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This page is a stub. Work in progress!
Sub-page items, like info boxes.
Whole-page layout boilerplate.
This page is a stub. Work in progress!
This page is a stub. Work in progress!
Yes, after a few months we finally found the answer. Sadly, Mike is on vacations right now so I'm afraid we are not able to provide the answer at this point.
The contents needlessly aided confusion or clutter in current context.
The contents are no longer sufficiently synchronized to remain accurate, public notes.
The contents previously discussed publication-centric information. This content is of no public interest at this time. The authors have elected not to maintain indefinite public access — at least for now. Note that the lead authors are committed to maximal transparency and accessibility. All of the gLAMP Review's dependencies have been selected with open access in mind. Further, all published content tied to the review's process is being archived for public use. These web archives are a comprehensive snapshot of the LAMP landscape c. 2020-2021. They will be published in 2021 and remain available indefinitely thereafter. (One author directs a preservation nonprofit applying synbio technologies to 'GLAM')
id
string
ID of the cake to get, for free of course.
recipe
string
The API will do its best to find a cake matching the provided recipe.
gluten
boolean
Whether the cake should be gluten-free or not.
Authentication
string
Authentication token to track down who is emptying our stocks.
{ "name": "Cake's name", "recipe": "Cake's recipe name", "cake": "Binary cake"}{ "message": "Ain't no cake like that."}$ give me super-powers# Ain't no code for that yet, sorry
echo 'You got to trust me on this, I saved the world'lamp.bio is the overall homepage.
docs.lamp.bio is the documentation hub.
LAMP Resources is a Google Drive folder currently housing miscellaneous documents.
Other resources will be added to this list over time.
Zotero is a reference manager with a web app, desktop apps, and group libraries.
A shared library is located here: zotero.org/groups/2644850/glamp_consortium.
TODO: add protocols group mention.
Mailing List / Forum
groups.google.com/g/glamp is a Google Group.
This group currently serves as the collaborative's primary email-based hub.
Note: institutional and disciplinary overlap means this is not the only list!
Chat
is a Slack Chat.
This chat currently serves as the primary chat-based review hub.
Call
Usual Day
Usual Time
(Zoom)
Mondays
11:00 - 12:00 ET (US)
Wednesdays
12:15 - 13:15 ET (US)
(Zoom)
Thursdays
12:00 - 13:00 ET (US)
Since March 2021, gLAMP R&D calls have been reduced in frequency.
Calls were previously on a weekly schedule. They're now monthly.
Calls are on the first Thursday of the month, unless announced otherwise.
Since March 2021, gLAMP Review calls no longer occur on any fixed schedule.
The review has been submitted. Routine writing calls are no longer needed!
The standing zoom link remains available for miscellaneous use.
gLAMP Members: please feel free to use the 'Writing Call' zoom link for impromptu meets.
The 'Regular Call' zoom link is also Chris Mason's general lab meeting link!
So please prefer the otherwise-unused Writing link over that one, to avoid gatecrashing.
The Global LAMP (gLAMP) Consortium was founded in April 2020, in the midst of the COVID-19 pandemic as a diverse group of stakeholders including scientists, engineers, physicians, educators, government officials, philanthropists, and more, who came together to address the global challenges in detecting SARS-CoV-2. As new results kept being reported on pre-prints posted on bioRxiv and medRxiv, it quickly became clear that LAMP technology showed great potential in providing rapid, accurate, and scalable diagnostics. Indeed, there are several different applications and approaches to LAMP methods that can be modified and adapted to various testing goals such as point-of-care clinical testing, community screening, monitoring city sewage samples, or swabbing urban spaces. gLAMP currently has over 300 members spanning academic labs, industry teams, non-profit, community biology, and government agencies. The group meets virtually every week to share IRB protocols, best practices, latest results from pilot experiments, reagent suppliers, and logistic experiences. The goal is to create an open environment where results can be shared to accelerate research as fast as possible and deploy the most optimal testing methods to the field.
gLAMP Central refers to planning around the creation of companion infrastructure to benefit ongoing gLAMP calls, in the spirit of "rough consensus and working code".
The gLAMP review is the first project resulting from gLAMP Central planning discussion. It is a collaborative synopsis of the key methods and developments shared over the course of 2020.
There are multiple ways to get involved in gLAMP's ongoing efforts.
This documentation page has been minimized and/or subpages have been pruned. This happens for one of, or a combination of, the following reasons:
The contents needlessly aided confusion or clutter in current context.
The contents are no longer sufficiently synchronized to remain accurate, public notes.
The contents previously discussed publication-centric information. This content is of no public interest at this time. The authors have elected not to maintain indefinite public access — at least for now. Note that the lead authors are committed to maximal transparency and accessibility. All of the gLAMP Review's dependencies have been selected with open access in mind. Further, all published content tied to the review's process is being archived for public use. These web archives are a comprehensive snapshot of the LAMP landscape c. 2020-2021. They will be published in 2021 and remain available indefinitely thereafter. (One author directs a preservation nonprofit applying synbio technologies to )
Core Information for Ron Orlando, PhD and other JBT staff.
3D set (posable)
Description
Format, Style
Title
Characters wearing masks / social distancing
3D, realistic
masked_1012_01
Render of scene from masked_1012_01
3D, realistic
masked_1012_02
Additional previews of masked_1012
3D, realistic
masked_1012_03
Additional previews of masked_1012
Rights: JC/Metamer
Description
Format, Style
Title
bottle + virions
vector, flat, cartoon
cute antiseptic bottle fight flat
earth + virions
vector, flat, cartoon
cute earth and coronavirus characters
doctor + virions
vector, flat, cartoon
doctor fight against coronavirus
scientist + virions
cute antiseptic bottle fight flat
cute earth and coronavirus characters
doctor fight against coronavirus
medical scientist cleaning
cute coronavirus characters
This page is a preview for JBT.
This page lists the annotated references of the manuscript. Annotations emphasize a subset of the bibliography entries. Each annotated entry receives:
Prioritization on a 3-point scale as one of the following:
a work of interest (•)
a work of special interest (••)
a work of outstanding interest (•••)
The 3-point scale takes after the conventions of series such as Annual Reviews and Current Opinions. The descriptions follow an Elsevier Highlights rubric.
An earlier FAQ, detailing further information, is available.
See: .
The Typesetting Sample subpage here describes the source material and desired output. See:
The Items subpage here contains the fullest non-.bib draft of all annotated references.
See:
This page documents the editorial aims that steered the writing process.
| Description | Format, Style | Title |
|:------------|:--------------|:------|
| | | |The contents needlessly aided confusion or clutter in current context.
The contents are no longer sufficiently synchronized to remain accurate, public notes.
The contents previously discussed publication-centric information. This content is of no public interest at this time. The authors have elected not to maintain indefinite public access — at least for now. Note that the lead authors are committed to maximal transparency and accessibility. All of the gLAMP Review's dependencies have been selected with open access in mind. Further, all published content tied to the review's process is being archived for public use. These web archives are a comprehensive snapshot of the LAMP landscape c. 2020-2021. They will be published in 2021 and remain available indefinitely thereafter. (One author directs a preservation nonprofit applying synbio technologies to 'GLAM')
Minimize reliance on time-sensitive information related to the COVID-19 pandemic.
Refer readers to reliable resources which we anticipate will continue to receive ongoing updates.
Identify the set of time-sensitive claims which we consider to be irreducible.
Plan to update those facts and figures from [3] at time of publication.
Ultimately, we reduced the list of items in updates at publication time to two items:
EUA Metadata: quantity, typological characteristics, and performance data for LAMP-based IVDs.
Variant Analysis: VOCs, 'topline' summaries on primer impacts, etc.
We have taken great care to be inclusive with respect to the work's many authors. We strongly feel that the breadth and depth of the authors' demographic and viewpoint diversity is to the work's ultimate benefit.
Brief characterization of major findings and significance.
As Of Date
Reviewers
Rounds
Headings
2021-06-01
2
1
2021-05-25
1
1
General Remarks
Inline Comments
0
60
General Remarks
Inline Comments
1
0
Recommendation: publish without scientific revision.
It's a damn good paper. The manuscript is really beautiful – it's like they walk you step by step through each parameter! I'm jealous and wish I could write this well!!
3D, realistic
masked_1012_04
vector, flat, cartoon
medical scientist cleaning
virions (multiple expressions)
vector, flat, cartoon
cute coronavirus characters
This is a changelog.
Frontmatter?
Bodymatter?
Topics?
Backmatter?
Added the platypus. That should keep them second-guessing for a while.
Animals are now super cute, all of them.
Patched a bug where humans would develop language & tools, organize, and destroy each other.
Removed deadly solar radiation.
Files accompanying this revision/release will be found below:
| Notation | Description | Examples |
| -------- | ----------------------- | ------------------- |
| XX.YY | Reviewer.Round | 01.01 , 02.01 |
| XX.YY.00 | Reviewer.Round.Overview | 01.01.00 , 02.01.00 |
| XX.YY.ZZ | Reviewer.Round.Comment | 01.01.01 , 01.01.19 |
Existing content has been removed.
FIXED
Existing content has been fixed.
Key
Value
VERSION
An identifier of the form D.D
DATE
The release date, written YYYY-MM-DD.
AFFECTS
The part has been modified in some way.
ADDED
There is new content.
CHANGED
There is a change to existing content.
REMOVED
# VERSION - DATE
## Affects
| Does this version affect... | TRUE or FALSE |
|:----------------------------|:--------------|
| Front Matter? | - [ ] FALSE |
| Body Matter? | - [ ] FALSE |
| Topic Matter? | - [x] TRUE |
| Back Matter? | - [ ] FALSE |
## Added
## Changed
## Removed
## FixedEnd of ChangelogAnnotation Typesetting Sample for JBT
For illustrative purposes, we have selected Maranhao2020.
Our bibliography is a .bib database.
Each entry is structured data in bibtex format.
An annotated entry's source is stored like so:
In this source, the annote field contains the annotations.
\onestar is priority 1 on the 1-3 scale, where 3 is highest.
\\ is a line-separator.
Further lines are highlight bullets on the cited work.
We cite Maranhao2020 by its citekey, Maranhao2020.
We do this using the \cite command, as in:
Lorem ipsum dolor sit amet.\cite{Maranhao2020}
Once rendered, this turns into a numeric value in brackets. If Maranhao2020 is reference number 4, for instance, the output is:
Lorem ipsum dolor sit amet.[4]
In our working draft's References section, Maranhao2020 renders like so:
[4] Andre Maranho, Sanchita Bhadra, Inyup Paik, David Walker, and Andrew D. Ellington. 2020. An improved and readily available version of Bst DNA Polymerase for LAMP, and applications to COVID-19 diagnostics. (oct 2020). We can change this ourselves to achieve the desired appearance. Our understanding is that the publisher will not be retaining LaTeX-based styles, however.
We would like to see the priority (● - ●●●) prefixed prior to the reference's author(s) field. Additionally, we ask that the highlight bullets not make use of a circular item label, for clarity. An alternative shape, such as a diamond or square, would assist in providing contrast:
[4] ● Andre Maranho, Sanchita Bhadra, Inyup Paik, David Walker, and Andrew D. Ellington. 2020. An improved and readily available version of Bst DNA Polymerase for LAMP, and applications to COVID-19 diagnostics. (oct 2020). ◇ Protein engineering fusion improves function of Bst DNA polymerase in LAMP ◇ Modifying Bst DNA polymerase significantly improves reverse transcriptase activity ◇ Further improves LAMP-OSD detection in pre-heated saliva without RNA extraction
If the is not possible:
Styles closer to the Current Opinions style are acceptable to us.
These styles are well-suited to flowing prose annotations.
[4] Andre Maranho, Sanchita Bhadra, Inyup Paik, David Walker, and Andrew D. Ellington. 2020. An improved and readily available version of Bst DNA Polymerase for LAMP, and applications to COVID-19 diagnostics. (oct 2020). ● Protein engineering fusion improves function of Bst DNA polymerase in LAMP Modifying Bst DNA polymerase significantly improves reverse transcriptase activity Further improves LAMP-OSD detection in pre-heated saliva without RNA extraction
Annotations contain two parts: a priority and outline-style highlights. Therefore there are two rubrics.
3-5 bullets
85 character limit, including whitespace
no end punctuation
Metastases mostly disseminate late from primary breast tumors, keeping most drivers
Drivers at relapse sample from a wider range of cancer genes than in primary tumors
Code, an interactive citation graph, and other goodies used in this process will appear.
Each reference contains provenance tagging by section.
This group field allows us to analyze our citations.
We fetched further informative metadata via:
We then tabulated two levels of citation analysis:
First, we looked at descriptive statistics.
Next, we calculated a few nontrivial measures.
Finally, we did a qualitative rundown of known-significant works and how we cited them.
Descriptive stats of relevance include:
citation frequency,
citation centrality,
between-section differences, and so forth.
Statistical measures of relevance include:
mutual and interaction information,
graphical properties — especially cliques and skew partitions,
"standard" citation analysis benchmarks, and so forth.
Finally, we
This ultimately the combined multi-bibliography by factors like:
citation frequency,
citation centrality, and
This section is a stub. Notes on how we arrived at these outcomes to appear.
See: About § gLAMP Review
2020 schedules were not carried over from prior docs.
‘Football team’ of co-authors and supporting contributors.
Co-authors help to write, collate, and synthesize contributions.
Sections prioritize topics of importance to the collective.
Section Leads are corresponding authors for their respective sections.
Volunteering Contributors write one or more elements for inclusion (½-¾ page each). We expect these contributions to be ‘close to home’ for the contributor and hence not a significant overhead to write. These can be a cliff note summary of a contributor’s presentation to a Thursday gLAMP, of a preprint, or a summary of an aspect of LAMP testing literature that they have particularly focused on.
Solicited Contributors are individuals that section leads will contact with a request for ½-¾ page on a particular topic for which we currently do not have coverage. If subsequent encouragement is needed, please let us know.
Everyone who contributes to the review will receive authorship credit.
For various other matters, refer to journal guides:
[ , ]
[ , ]
[]
Biorender and any visualization tool you might require.
Yes.
Early notes were collated at .
We have everything from the duration of the gLAMP review writing period. Are you looking for something that seems to be missing? Let Jeremy and Keith know. We'll make it more visible.
Mutational processes similar in primary and relapse; radiotherapy can damage genome
Learning and Instruction, Volume 21, Issue 6, December 2011, 746-756
Fading of a script alone does not foster domain-general strategy knowledge
Performance of the strategy declines during the fading of a script
Monitoring by a peer keeps performance of the strategy up during script fading
Performance of a strategy after fading fosters domain-general strategy knowledge
Fading and monitoring by a peer combined foster domain-general strategy knowledge
Distributed those items with scores on a 1-3 scale, in a matter we found reasonable.
So, full disclosure: this information is under-documented for now. It's also only relevant for internal purposes at this point, if at all.
third-party machine-learning platforms, and
third-party query services such as Crossref.
citation mutual / interaction information wit
What Changes
These styles place the priority marker inline with the first line of annotation text.
@Article{Maranhao2020,
author = {Andre Maranhao and Sanchita Bhadra and Inyup Paik and David Walker and Andrew D. Ellington},
title = {An improved and readily available version of Bst {DNA} Polymerase for {LAMP}, and applications to {COVID}-19 diagnostics},
year = {2020},
month = {oct},
doi = {10.1101/2020.10.02.20203356},
groups = {04-target-amplification, has-annotation, 10.08-bst-polymerase-biology},
publisher = {Cold Spring Harbor Laboratory},
timestamp = {2020-12-17},
annote = {%
\onestar\\
Protein engineering fusion improves function of Bst DNA polymerase in LAMP\\
Modifying Bst DNA polymerase significantly improves reverse transcriptase activity\\
Further improves LAMP-OSD detection in pre-heated saliva without RNA extraction\\
%}
}The gLAMP Review is a multi-component project. It consists of a variety of files and moving parts. We have used certain conventions to aid in tracking these parts.
The overall assembly is partitioned into four (4) parts.
Each part contains sections.
Every element has an index in a sectioning scheme.
This scheme consists of indices of the form DD.DD.DD.
Front Matter
00 Metadata
00.01 People

00.03 Usage
01 Opening Remarks
01.01 Dedication
01.02 Preface
Body Matter
02 Tour
02.01 Outlines
02.01.01 Table of Contents
02.01.02 List of Figures
02.01.03 List of Tables
02.02 Tips For Readers
02.02.01
02.02.02
02.02.03
03 Introduction
04 Samples
05 Amplification
06 Detection
07 Infrastructure
08 Regulations
09 Discussion
Topics
10A Review Highlights and Takeaways
10.01 Take Away Summary
10.02 Mental Models
10.03 Cold Spring Harbor
10B LAMP in the 'Real World'
10.04 Schools
10.05 LMIC
10.05.01 ASSURED/REASSURED
10C Emerging Protocols and Methods
10.07 Variants and Sequencing
10.07.01 On Mutations
10D Biotechnology
10.10 LAMP Reader App
10.11 BioRanger
10.12 GeneMe
Back Matter
11.01 Index
11.02 Glossary
11.03 References
11.04 Supplement
11.04.01 Code
11.04.02 Data
11.04.03 Tables
11.05 Web Resources
11.05.01 Accessibility (Audio)
11.05.02 Interactives
11.05.03 Updates
Part
Sections
Front Matter
00 - 01
Body Matter
02 - 09
Topic Matter
10
Back Matter
11





10.05.02 SE Asia Case Study
10.06 Wastewater Surveillance
10.08 Bst polymerase biology
10.09 LAMP on Paper
10.13 Axxin Fluorimeter



Extended details of authorship and structure.
Item
Description
Front Matter
JC and KM are the main authors of the front matter.
CM and ST have provided additional input/suggestions.
Body Matter
*Emerging Technologies
What happened to the Emerging Technologies section?
The following sections merged, forming Infrastructure:
Emerging Technologies
Copyright, Permissions
01 Opening Remarks
Dedication
Preface
Introductory remarks of a broad-ranging nature. Placement: standalone item preceding the review.
02 Tour
Outlines
Provides standard introductory outlines, ex.
Table of Contents
List of Figures
List of Tables
Tips For Readers
Provides reader guide to using the work
TOC For Topics
Provides call-out text (preview) for Topic Matter.
Layout: textbook 'box' style.
Placement: directly preceding introduction.
03 Introduction
Content (cf. editorial) introduction. Discusses COVID-19 and LAMP.
04 Samples
Discusses samples and preanalytic processing.
05 Amplification
Discusses amplification with LAMP.
06 Detection
Discusses detection methods and techniques.
07 Infrastructure
Discusses technical and social infrastructure, incl.
bioware ('wet' biotechnology)
hardware & software ('dry')
organizations.
08 Regulations
Discusses regulatory landscape for SARS-CoV-2.
09 Discussion
Provides closing remarks for Body Matter. Discusses normative recommendations.
10 Topics
Discusses specialist topics in four clusters.
11 Back Matter
Pertains to all end matter, 'extras', and SI.
Index
Provides an index of terms used in the work.
Glossary
Provides definitions of terms used in the work.
References
Provides details of cited works, including
annotations
priorities
standard bibliometric information.
Supplement
Provides code, data, tables, and other SI.
Web Resources
Provides links to external SI, including:
narration of the work
interactive versions of figures
updating locations.
12 Other
Annotated Bibliography FAQ
Explains the premise of annotated references.
Provides samples of annotated references.
Glossary FAQ
Explains the premise of the glossary.
Provides samples of glossary contents.
Provides samples of glossary layouts.
Homebrew Corner
We have maintained the original section numbering for continuity.
All of these sections have been subject to extensive coauthorship.
Each section has 2 or more co-lead authors ("Section Leads").
Section Leads are responsible for steering their respective sections.
Section Leads directed the contributions of coauthors ("Section Contributors").
Topics
The items within Section 10 have not been open to comingling of coauthors.
Exclusivity has been enforced with respect to primary authors.
JC and KM have 100% confidence in the attribution of each contribution herein.
The items within Section 10 have, however, all received editing.
JC and KM have performed this editing.
Whenever possible, pains have been taken to minimize modifications.
Certain items within Section 10 have received more substantial alterations.
JC and KM have, in a few instances, notably refactored or expanded items.
These cases are explicitly noted in submitted revisions.
Back Matter
JC and KM are the main authors of most items of the back matter.
JS, ST, and RR provided additional contributions.
Some SI is authored exclusively by other contributors.
Item
Sub-Item
Description
00 Metadata
Information about the work, authors, and rights.
People
Authors, Acknowledgements
Publication
Abstract, Keywords, Title
Usage
There are 36 annotated items in total.
Alekseenko, A., Barrett, D., Pareja-Sanchez, Y., Howard, R. J., Strandback, E., Ampah-Korsah, H., Rovšnik, U., Zuniga-Veliz, S., Klenov, A., Malloo, J., Ye, S., Liu, X., Reinius, B., Elsässer, S. J., Nyman, T., Sandh, G., Yin, X., & Pelechano, V. (2021). Direct detection of SARS-CoV-2 using non-commercial RT-LAMP reagents on heat-inactivated samples. Scientific reports, 11(1), 1820. https://doi.org/10.1038/s41598-020-80352-8
STARS: 2
ANNOTE
RT-LAMP detects medium-high viral loads in swabs without RNA extraction and purification
Describes homebrew production of B.stearothermophilus Bst-LF ‘v5.9’ from Ellington et al
Provides an alternative to commercial reagents for RT-LAMP based SARS-COv2 detection.
Becherer, L N. Borst, M. Bakheit, S. Frischmann, R. Zengerle, and F. von Stetten, “Loop-mediated isothermal amplification (LAMP) – review and classification of methods for sequence-specific detection,” Analytical Methods, vol. 12, no. 6, pp. 717–746, 2020.
STARS: 2
ANNOTE
LAMP has a propensity to create non-specific amplicons caused by mis-priming
Sequence-specific amplicon detection can significantly increase LAMP specificity
Ben-Assa, N et al. , “Direct on-the-spot detection of SARS-CoV-2 in patients,” Experimental Biology and Medicine; , vol. 245, no. 14, pp. 1187–1193, jul 2020.
STARS: 1
ANNOTE
An early report of the use of saliva (cf. UTM/VTM) in pH-based colourimetric RT-LAMP
Simplified sample processing with proteinase K prior to heating and the RT-LAMP test
Bektas, A., Covington, M., Aidelberg, G., Arce, A., Matute, T., N\'u\~nez, I., Walsh, J., Boutboul, D., Lindner, A., Federici, F., & Jayaprakash, A. (2021). Accessible LAMP-Enabled Rapid Test (ALERT) for detecting SARS-CoV-2. medRxiv.
STARS: 3
ANNOTE
ALERT: a streamlined process that improves overall LAMP performance and usability
Separating RT reaction from LAMP significantly improves limit of detection
Bhadra, S., Riedel, T., Lakhotia,S., Tran, N.D., and Ellington, A. High-surety isothermal amplification and detection of SARS-CoV-2, including with crude enzymes bioRxiv 2020.04.13.039941; doi: ; Now accepted for publication in mSphere
STARS: 3
ANNOTE
Converts three assays using non-specific to a sequence-specific fluorescence readout
One-strand displacement (OSD) creates a stable, multicolor readout for saliva LAMP
Broughton, J et al. , “CRISPR–cas12-based detection of SARS-CoV-2,” Nature Biotechnology , vol. 38, no. 7, pp. 870–874, apr 2020.
STARS: 1
ANNOTE
The CRISPR-Cas system detects E and N gene sequences by using specific guide RNA
Once bound to cDNA amplified by RT-LAMP, collateral Cas12 ssDNase activity is activated
Corman, V. M., Landt, O., Kaiser, M., Molenkamp, R., Meijer, A., Chu, D. K., Bleicker, T., Brünink, S., Schneider, J., Schmidt, M. L., Mulders, D. G., Haagmans, B. L., van der Veer, B., van den Brink, S., Wijsman, L., Goderski, G., Romette, J. L., Ellis, J., Zambon, M., Peiris, M., … Drosten, C. (2020). Detection of 2019 novel coronavirus (2019-nCoV) by real-time RT-PCR. Euro surveillance : bulletin Europeen sur les maladies transmissibles = European communicable disease bulletin, 25(3), 2000045.
STARS: 2
ANNOTE
Early reference paper, endorsed by the WHO, on which many RT-qPCR tests were based
Created a workflow for detecting SARS-CoV-2 vs. other human respiratory viruses
de Oliveira Coelho, B., Sanchuki, H., Zanette, D. L., Nardin, J. M., Morales, H., Fornazari, B., Aoki, M. N., & Blanes, L. (2021). Essential properties and pitfalls of colorimetric Reverse Transcription Loop-mediated Isothermal Amplification as a point-of-care test for SARS-CoV-2 diagnosis. Molecular medicine (Cambridge, Mass.), 27(1), 30.
STARS: 2
ANNOTE
Diagnostic comparison (94% sensitivity, 90% specificity) using RNA extracted from NPS
Highlights an intermediate orange result when using a pH sensitive readout (red or yellow)
Ding, Sheng, et al. “Sequence-Specific and Multiplex Detection of COVID-19 Virus (SARS-CoV-2) Using Proofreading Enzyme-Mediated Probe Cleavage Coupled with Isothermal Amplification.” Biosensors & Bioelectronics, vol. 178, Apr. 2021, p. 113041. .
STARS: 1
ANNOTE
Addresses the false positives arising from lack of sequence-specificity in many LAMP readouts
Uses Pfu proof-reading enzyme-mediated probe cleavage (RT-Proofman-LAMP)
Maranhao, Andre, et al. An Improved and Readily Available Version of Bst DNA Polymerase for LAMP, and Applications to COVID-19 Diagnostics. preprint, Infectious Diseases (except HIV/AIDS), 5 Oct. 2020. .
STARS: 1
ANNOTE
Protein engineering fusion improves function of Bst DNA polymerase in LAMP
Modifying Bst DNA polymerase significantly improves reverse transcriptase activity
Fowler, V. L., Armson, B., Gonzales, J. L., Wise, E. L., Howson, E., Vincent-Mistiaen, Z., Fouch, S., Maltby, C. J., Grippon, S., Munro, S., Jones, L., Holmes, T., Tillyer, C., Elwell, J., Sowood, A., de Peyer, O., Dixon, S., Hatcher, T., Patrick, H., Laxman, S., … Kidd, S. P. (2021). A highly effective reverse-transcription loop-mediated isothermal amplification (RT-LAMP) assay for the rapid detection of SARS-CoV-2 infection. The Journal of infection, 82(1), 117–125.
STARS: 2
ANNOTE
Reports a novel RT-LAMP assay with 97% and 99% clinical sensitivity and specificity, respectively
Almost perfect agreement with RNA RT-LAMP (extracted RNA) and RT-qPCR
Ganguli, A., Mostafa, A., Berger, J., Aydin, M., Sun, F., Valera, E., Cunningham, B. T., King, W. P., & Bashir, R. (2020). Rapid Isothermal Amplification and Portable Detection System for SARS-CoV-2. bioRxiv : the preprint server for biology, 2020.05.21.108381.
STARS: 1
ANNOTE
Introduces an RNA extraction-free method from patient swab samples via heat-lysis
Microfluidic-phone camera example of portable hardware system for biosurveillance
Garneret, P., Coz, E., Martin, E., Manuguerra, J. C., Brient-Litzler, E., Enouf, V., González Obando, D. F., Olivo-Marin, J. C., Monti, F., van der Werf, S., Vanhomwegen, J., & Tabeling, P. (2021). Performing point-of-care molecular testing for SARS-CoV-2 with RNA extraction and isothermal amplification. PloS one, 16(1), e0243712.
STARS: 1
ANNOTE
COVIDISC, a paper-based fabricated portable device for point-of-care testing
Combines RNA extraction and running RT-LAMP reactions in one device
James, P., Stoddart, D., Harrington, E., Beaulaurier, J., Ly, L., Reid, S., Turner, D., & Juul, S. (2020). LamPORE: rapid, accurate and highly scalable molecular screening for SARS-CoV-2 infection, based on nanopore sequencing. medRxiv.
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LAMPoreTM combines triplexed SARS-CoV-2 detection and nanopore DNA sequencing
Performs 96 reactions in two hours with good concordance with RT-qPCR using swab samples
Jureka, A. S., Silvas, J. A., & Basler, C. F. (2020). Propagation, Inactivation, and Safety Testing of SARS-CoV-2. Viruses, 12(6), 622.
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Important methods and considerations for live viral manipulation/inactivation
Propagation of SARS-CoV-2 in different cell lines to augment supply of control RNA
Kahl, L., Molloy, J., Patron, N. et al. Opening options for material transfer. Nat Biotechnol 36, 923–927 (2018).
STARS: 2
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Introduces the principles of Open Material Transfer Agreements in the open bioeconomy
Relaxes the outdated restrictions on redistribution and commercial use of biological materials
Kellner, M., Ross, J., Schnabl, J., Dekens, M., Heinen, R., Grishkovskaya, I., Bauer, B., Stadlmann, J., Menéndez-Arias, L., Fritsche-Polanz, R., Traugott, M., Seitz, T., Zoufaly, A., Födinger, M., Wenisch, C., Zuber, J., , Pauli, A., & Brennecke, J. (2020). A rapid, highly sensitive and open-access SARS-CoV-2 detection assay for laboratory and home testing. bioRxiv.
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Introduces an extraction-free pH buffered Hydroxynapthol blue (HNB)-based RT-LAMP
Highlights the use of the dUTP/UDG system to prevent carryover contamination
Larremore, D., Wilder, B., Lester, E., Shehata, S., Burke, J., Hay, J., Tambe, M., Mina, M., & Parker, R. (2020). Test sensitivity is secondary to frequency and turnaround time for COVID-19 surveillance. medRxiv.
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Challenges the assumption that clinical sensitivity is paramount for effective surveillance
Highlights the importance of testing frequency and reporting speed
Mina, M. J., Parker, R., & Larremore, D. B. (2020). Rethinking Covid-19 Test Sensitivity - A Strategy for Containment. The New England journal of medicine, 383(22), e120.
STARS: 3
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Reframes and challenges the current predominant view on COVID-19 testing sensitivity
Highlights that analytical sensitivity and clinical sensitivity are not the same
Moehling, T. J., Choi, G., Dugan, L. C., Salit, M., & Meagher, R. J. (2021). LAMP Diagnostics at the Point-of-Care: Emerging Trends and Perspectives for the Developer Community. Expert review of molecular diagnostics, 21(1), 43–61.
STARS: 1
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Complementary review providing valuable insights on development of LAMP diagnostics
Describes advantages and disadvantages of different human samples
Natoli, M., Kundrod, K., Chang, M., Smith, C., Paul, S., Eldin, K., Patel, K., Baker, E., Schmeler, K., & Richards-Kortum, R. (2021). Reverse transcription loop-mediated isothermal amplification (Rt-lamp) for point-of-care detection of SARS-CoV-2: A clinical study to evaluate agreement with RT-qPCR. The Lancet. Global Health, 9, S3.
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Evaluates the clinical performance of NPS-based but extraction-free RT-LAMP test
Performance (92% sensitivity, 91% specificity) was maintained using a lower-cost reader
Notomi, T., Okayama, H., Masubuchi, H., Yonekawa, T., Watanabe, K., Amino, N., & Hase, T. (2000). Loop-mediated isothermal amplification of DNA. Nucleic acids research, 28(12), E63.
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Pioneer LAMP paper: introduces LAMP as a novel DNA amplification method
Highly specific and sensitive isothermal amplification with a strand-displacing polymerase
Rabe, B. A., & Cepko, C. (2020). SARS-CoV-2 detection using isothermal amplification and a rapid, inexpensive protocol for sample inactivation and purification. Proceedings of the National Academy of Sciences of the United States of America, 117(39), 24450–24458.
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Pivotal paper for low-cost RNA extraction-free methods from human samples
A basis for many succeeding papers that uses heat/TCEP/EDTA to inactivate RNases
Sherrill-Mix, S., Duyne, G., & Bushman, F. (2021a). Molecular beacons allow specific RT-LAMP detection of B.1.1.7 variant SARS-CoV-2. medRxiv.
STARS: 2
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Demonstrates the ability of hybridisation-based molecular beacons to detect variants
Pilot study on variant-discrimination for SARS-CoV-2 (S1∆69-70 deletion)
Sherrill-Mix, S., Hwang, Y., Roche, A., Glascock, A., Weiss, S., Li, Y., Haddad, L., Deraska, P., Monahan, C., Kromer, A., Graham-Wooten, J., Taylor, L., Abella, B., Ganguly, A., Collman, R., Van Duyne, G., & Bushman, F. (2021b). LAMP-BEAC: Detection of SARS-CoV-2 RNA Using RT-LAMP and Molecular Beacons. medRxiv.
STARS: 3
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Excellent example of use of molecular beacons for sequence-specific amplicon detection
Addresses the false positives arising LAMP to improve reliability and sensitivity of a test
Snodgrass, R., Gardner, A., Semeere, A., Kopparthy, V. L., Duru, J., Maurer, T., Martin, J., Cesarman, E., & Erickson, D. (2018). A portable device for nucleic acid quantification powered by sunlight, a flame or electricity. Nature biomedical engineering, 2(9), 657–665.
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Addresses poor diagnostic infrastructure due unreliable access to electricity in Africa
TINY: portable microfluidic LAMP device, operating with electricity and alternative power sources
Tan, S. H.; Allicock, O.; Armstrong-Hough, M. & Wyllie, A. L. Saliva as a gold-standard sample for SARS-CoV-2 detection The Lancet Respiratory Medicine, Elsevier BV, 2021, 9, 562-564
STARS: 3
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Mini-review summarising the potential and pitfalls of using saliva as a biospecimen
Focus is on collection, handling, transport, and storage of saliva relative to NPS
Tanner, N. A., Zhang, Y., & Evans, T. C. (2012). Simultaneous multiple target detection in real-time loop-mediated isothermal amplification. BioTechniques, 53(2), 81–89. https://doi.org/10.2144/0000113902
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First report of ‘DARQ’ fluorescent LAMP for multiplexed detection of four targets
Initial reports of the widely-used Bst 2.0 and WarmStart Bst 2.0 DNA polymerases
Vogels, C., Watkins, A. E., Harden, C. A., Brackney, D. E., Shafer, J., Wang, J., Caraballo, C., Kalinich, C. C., Ott, I. M., Fauver, J. R., Kudo, E., Lu, P., Venkataraman, A., Tokuyama, M., Moore, A. J., Muenker, M. C., Casanovas-Massana, A., Fournier, J., Bermejo, S., Campbell, M., … Grubaugh, N. D. (2021). SalivaDirect: A simplified and flexible platform to enhance SARS-CoV-2 testing capacity. Med (New York, N.Y.), 2(3), 263–280.e6.
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First saliva-based SARS-CoV-2 detection to be granted EUA by the FDA
Led to increased awareness and interest in saliva as a biospecimen type
Wang, Rui, et al. “OpvCRISPR: One-Pot Visual RT-LAMP-CRISPR Platform for SARS-Cov-2 Detection.” Biosensors and Bioelectronics, vol. 172, Jan. 2021, p. 112766. .
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CRISPR incorporates gRNA for specificity with enzymatic amplification to increase sensitivity.
Incorporating CRISPR-Cas12a improves LAMP sensitivity by a factor of 10
Wölfel, R., Corman, V.M., Guggemos, W. et al. Virological assessment of hospitalized patients with COVID-2019. Nature 581, 465–469 (2020).
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Early report monitoring the viral load, replication rates and clinical symptoms from nine COVID cases
Respiratory samples with < 10^6 copies per mL did not yield a replicative isolate
Yan, C., et al. “Rapid and Visual Detection of 2019 Novel Coronavirus (SARS-CoV-2) by a Reverse Transcription Loop-Mediated Isothermal Amplification Assay.” Clinical Microbiology and Infection, vol. 26, no. 6, June 2020, pp. 773–79. .
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Thorough description of primer design strategy to create primer sets for orf1ab and S genes.
First to demonstrate 100% sensitivity and 100% specificity on clinical samples via visual readout
Yang, Q., Meyerson, N. R., Clark, S. K., Paige, C. L., Fattor, W. T., Gilchrist, A. R., Barbachano-Guerrero, A., Healy, B. G., Worden-Sapper, E. R., Wu, S. S., Muhlrad, D., Decker, C. J., Saldi, T. K., Lasda, E., Gonzales, P., Fink, M. R., Tat, K. L., Hager, C. R., Davis, J. C., … Sawyer, S. L. (2021). Saliva TwoStep for rapid detection of asymptomatic SARS-CoV-2 carriers. ELife, 10, e65113. .
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Saliva-based detection of SARS-CoV-2 in asymptomatic individuals at 94% sensitivity
Neutralising saliva stabilisation solution with Proteinase K for saliva-based RT-LAMP
Yaren, O., McCarter, J., Phadke, N., Bradley, K. M., Overton, B., Yang, Z., Ranade, S., Patil, K., Bangale, R., & Benner, S. A. (2021). Ultra-rapid detection of SARS-CoV-2 in public workspace environments. PloS one, 16(2), e0240524.
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Development of a sequence-specific method for amplicon detection (displaceable probe, DP)
Reports successful use of two COVID-19 primer sets with Rnase P and DP in a single tube assay
Zhang, Y., Odiwuor, N., Xiong, J., Sun, L., Nyaruaba, R., Wei, H., & Tanner, N. (2020). Rapid Molecular Detection of SARS-CoV-2 (COVID-19) Virus RNA Using Colorimetric LAMP. medRxiv.
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An early paper demonstrating the feasibility of SARS-CoV-2 detection using RT-LAMP
Vital study that designed five LAMP primer sets targeting SARS-CoV-2 RNA
Zhang, Yinhua, and Nathan A. Tanner. Development of Multiplexed RT-LAMP for Detection of SARS-CoV-2 and Influenza Viral RNA. preprint, Epidemiology, 27 Oct. 2020. .
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Describes application of DARQ for sequence-specific detection of SARS-CoV2 amplicons
Multiplexing of SARS-CoV2 and influenza virus as pathogens leading to similar symptoms
The Review provides a systematic, comprehensive summary to the analytical options
Several of the fluorescent methods described have been applied to SARS-CoV2 LAMP
We foresee an ever-increasing proportion of multiplexed, multicolour LAMP tests
Clinical testing yielded acceptable sensitivity equivalent to RT-qPCR cut-off Ct ≲ 29
Provides a good example of method development and initial clinical validation
Sequence-specific QUASR probe improves specificity, reducing false positive rates
Co-detection with other respiratory viruses by multiplexing with QUASR fluorescent probes
Use of wax layers to lengthen reagent shelf-life of ready-to-use mixes at room temperature
One-pot reactions assembled using ‘homebrew’ enzyme reagents
Highly versatile multiplex method well-suited to primary screening in resource limited settings
One of a core of ~ 5-6 sequence-specific methods which we foresee to increase in use
The ssDNase activity can be readily monitored by quenched fluorescence or lateral flow
With a LoD ~ 10 copies/uL, the DETECTR system demonstrated 95% sensitivity/100% specificity
CRISPR has potential to increase specificity and sensitivity albeit at the cost of complexity
RNA controls are made available through European Virus Archive (EVAg)
Research and RNA controls made possible by widespread coordination across the EU.
Orange readout is characteristic of samples with corresponding RT-qPCR ≥ 30 Ct.
Insight into a range of low/indeterminate viral load where confirmatory testing is required.
Real-time or end-point monitoring in a closed-tube format suitable for point-of-care testing
Sequence-specificity enables multiplexing COVID-19 genes and internal control amplicons
Recent addition to the list of multiplexed, sequence specific detection methods for LAMP
Further improves LAMP-OSD detection in pre-heated saliva without RNA extraction
Proposes replacing RT-qPCR with RNA RT-LAMP for higher throughput
Suggests using direct RT-LAMP (1:20 VTM dilution) for screening the highly infectious
With VTM, comparable analytical sensitivity and specificity vs RT-qPCR
Cost-effective at $2-4 per device, removing the need for complex instruments.
Example of the potential for integrating sequencing with LAMP e.g for variant detection.
Lists various viral Inactivation methods to allow research be done at lower biosafety levels
Better adapted to current research practices allowing broder sharing of materials and technology
Improves LAMP sensitivity through RNA purification via use of magnetic beads
Compares commercial and homebrew LAMP enzymes to develop lower-cost test
A comprehensive and highly cited paper from the influential Vienna group
High frequency and large scale testing is more effective than high sensitivity
Clinical sensitivity cannot be simply be defined by the limit of analytical detection
Provides rationale for widespread use of LAMP with more rapid reporting than qPCR.
Recommends that clinical sensitivity be contextualized and defined as fit-for-purpose
Highlights mispriming in saliva-based LAMP as a source of false positives
Emphasizes the need for sequence-specific detection, e.g QUASR, to increase specificity.
An example of many such studies reporting comparable performance of LAMP vs qPCR
Initial paper describes use of 4 primers; later extended to include 2 Loop primers
Methodology is operationally simple but mechanistically and bioinformatically complex
Bead-based and extraction-free (‘direct’) RT-LAMP methods are described in detail.
Demonstrates that NaI-based inactivation and purification system improves LAMP sensitivity
Targeted approach that aids in managing and containing the spread of the COVID-19 variants
Unique and characteristic melt curves provide additional level of specificity
Demonstrated multiplexed detection with extraction-free saliva RT-LAMP.
94% agreement between TINY and commercial PCR for the detection of herpesvirus
Example of small, simple devices for PCR that can be applied to LAMP.
Comprehensive Supplementary Information tabulating large number of comparative studies
Discusses points of disagreement regarding performance of saliva- vs NPS-based tests
A balanced minireview but with clear advocacy for saliva if carefully collected and processed.
Bst 2.0 speeds up the LAMP reaction signal by 50% over wild-type Bst DNA polymerase
Using RT-qPCR, SalivaDirect and nasopharyngeal swabs have high positive agreement (94%)
Early example of a viable cost-effective alternative method to improve accessibility
opvCRISPR combines RT-LAMP and CRISPR-Cas12a with a colorimetric readout in a single well
Clinically, 100% positive agreement between RT-qPCR and opvCRISPR
Alternative CRISPR methods use Cas13 rather than Cas12.
Discharge is proposed for patients beyond day 10 or with < 100000 viral RNA copies / mL.
Both criteria predict low residual risk of infectivity based on cell culture.
Analytical LoD of RT-qPCR far exceeds the clinically relevant viral loads for many patients
Provides data to determine what is a functionally important sensitivity for LAMP tests.
The LAMP assay discriminates SARS-CoV-2 from 60 other respiratory pathogens
Highlights value of having multiple primer sets to discriminate related viruses
Good example of a design to method development to clinical validation study
Example of addressing need for simple and portable yet reliable test for biosurveillance
Simplified cost-effective RNA extraction-free method suitable for large scale testing
Highlights the value of widespread, frequent testing of asymptomatics - ‘test often, test quickly’.
The primers could reliably detect 120 copies/reaction using colorimetric (pH-based) LAMP
Served as foundation for many succeeding (colorimetric) RT-LAMP COVID-19 papers
Related to another sequence-specific detection method (QUASR, Betkas et al., 2021)
Enables real-time fluorescence monitoring c.f end-point measurement for QUASR