Emmanuel Profile picture
Apr 22 10 tweets 4 min read Read on X
𝗧𝗵𝗲𝗿𝗮𝗽𝗲𝘂𝘁𝗶𝗰 𝘁𝗮𝗿𝗴𝗲𝘁𝘀 𝗳𝗼𝗿 𝗖𝗢𝗩𝗜𝗗-19

2 𝘸𝘰𝘯𝘥𝘦𝘳𝘧𝘶𝘭 𝘴𝘵𝘶𝘥𝘪𝘦𝘴 𝘸𝘪𝘵𝘩 𝘨𝘳𝘦𝘢𝘵 𝘷𝘪𝘴𝘶𝘢𝘭𝘪𝘴𝘢𝘵𝘪𝘰𝘯𝘴, 𝘧𝘰𝘳 𝘢 𝘱𝘰𝘴𝘪𝘵𝘪𝘷𝘦 𝘰𝘶𝘵𝘭𝘰𝘰𝘬 🤗 Image
2)"Therapeutic targets and interventional strategies in COVID-19: mechanisms and clinical studies"

Current treatment strategies for COVID-19 can be classified into "target virus" and "target host" categories. Repurposing existing drugs, emerging drugs .. nature.com/articles/s4139…
Image
3) ...and promising potential targets fall under these categories.
For the host, ACE2 receptor, TMPRSS2 protease, inflammatory cytokines and their pathways, CD147, and HMGB1 are potential therapeutic targets based on their roles in viral entry/pathogenesis/excessive inflammation. Image
4) Future directions include focusing on more promising targets, strengthening multi-disciplinary cooperation, addressing gaps between preclinical/clinical research, and monitoring viral mutations. A combination of antiviral and immunomodulatory therapies may be most effective. Image
5) For vaccines ... Image
6) "Therapeutic strategies for COVID-19: progress and lessons learned"
nature.com/articles/s4157…
Image
7) Potential therapeutic targets include viral proteins like spike, protease, RNA polymerase, and host proteins involved in viral entry/ immunopathology. Various agents have shown anti-SARS-CoV-2 activity in preclinical/clinical studies, but most require further development. Image
8) Treatment strategies aim to administer antiviral drugs early to outpatients, while immunomodulators may benefit severely ill inpatients. Treating long COVID remains challenging due to its unclear mechanisms. Development of pan-coronavirus therapies is another priority area. Image
9) Overall, while progress has been made, more convenient and broadly effective antiviral therapies are still needed to effectively tackle COVID-19 and future coronavirus outbreaks, including those targeting key viral proteins and able to counter emerging variants. Image
10) Thanks for reading 🙏 and have a wonderful sunday 🤗 Image

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More from @ejustin46

Dec 11
POLYGENIC DETERMINANTS OF H5N1 ADAPTATION TO BOVINE CELLS

H5N1 avian influenza virus (lineage 2.3.4.4b, B3.13 genotype) has unexpectedly caused a large outbreak in dairy cattle in North America.

biorxiv.org/content/10.110…Image
2) The study focused on understanding how the internal genomic segments of this virus have adapted to bovine cells. The researchers generated 45 reassortant viruses and found that multiple segments of the B3.13 viruses contribute to their faster replicative fitness ... Image
3) ...in bovine cells, compared to other influenza A viruses. Additionally, the B3.13 recombinants were less susceptible to the bovine interferon response, but still restricted by the human MX1 protein. Image
Read 4 tweets
Dec 11
The SARS-COV-2 "HIJACKOME"
explained in a few figures
(Part 1)

The "hijackome" refers to the set of host cell components and processes that the SARS-CoV-2 virus exploits or "hijacks" to enable its own replication and spread within the infected cells. Image
2) The figure 1c shows the levels of key SARS-CoV-2 viral proteins (e.g. nucleocapsid, spike) over the course of infection in the host cells. The Omicron BA.1 and BA.5 variants had slower initial increases in viral protein levels compared to other variants, but ... Image
3)...reached similar high levels by the later 36-hour timepoint.

Potential explanation for slower early kinetics: The study suggests this slower early infection progression for Omicron BA.1 and BA.5 may be due to differences in their replication and entry mechanisms compared ...
Read 4 tweets
Dec 5
GENETIC FACTORS play a MAJOR ROLE in how the IMMUNE SYSTEM RESPONDS to COVID-19.
biorxiv.org/content/10.110…Image
2) The researchers found thousands of genetic variants that influence gene expression in immune cells, and many of these were specific to COVID-19 patients. They also discovered that the effects of these genetic variants depend on the functional state of the immune cells. Image
3) Importantly, the genetic risk factors for severe COVID-19 were linked to these patient-specific genetic effects on gene expression. Overall, the results highlight how an individual's genetics can significantly shape their immune response and ... Image
Read 5 tweets
Dec 2
How LONG can H5N1 REMAIN STABLE in RAW MILK?
Why does the widespread DETECTION of H5N1 in WASTEWATER NOT LEAD to a HIGH NUMBER of HUMAN CASES?

biorxiv.org/content/10.110…Image
2) The study found that H5N1 is remarkably stable in raw milk, with a half-life of 2.1 days at 4°C. This means infectious virus could persist for over a month in refrigerated raw milk from infected cows. Even at room temperature (22°C), the half-life was 0.74 days ... Image
3) ...retaining infectivity for up to 3 weeks. The high protein content of milk appears to stabilize the virus.

In contrast, H5N1 had a much shorter half-life of only 0.48 days (12 hours) at 22°C in wastewater. The rapid inactivation of the virus in wastewater likely ...
Read 4 tweets
Dec 1
UNDERSTANDING the EMERGENCE and SPREAD of NEW VARIANTS

Example of Dispersal history of SARS-CoV-2 variants Alpha, Delta, and Omicron (BA.1) in Spain
pmc.ncbi.nlm.nih.gov/articles/PMC11…Image
2) The dominant factors that contributed to the emergence and spread of new SARS-CoV-2 variants in Spain appear to be:

▶️ Relaxation of control measures: The study links the increased introductions and spread of Delta and Omicron-BA.1 to the "lifting of certain control measures" Image
3)..and "easing of travel restrictions," suggesting relaxed public health interventions were key.

▶️ Seasonal factors and human mobility: The Delta wave coincided with the "summer period, when Spain receives a considerable number of tourists," indicating seasonal changes and... Image
Read 6 tweets
Nov 27
The DANGER THEORY of IMMUNITY revisited
(A fascinating study 💯👍)

This theory proposed by Polly Matzinger in 1994, suggests that the immune system responds primarily to signs of tissue stress or damage rather than just recognizing foreign invaders.
nature.com/articles/s4157…Image
2) This means that for the immune system to react effectively, it needs two things: the ability to recognize harmful substances (antigenicity) and signals that indicate tissue damage (adjuvanticity). Image
3) Research shows that cancer cells and viruses can trick the immune system by hiding these damage signals. Additionally, imbalances in gut bacteria can weaken the immune system's response to infections. Image
Read 5 tweets

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