Thailand Medical News - For All The Latest Breaking Medical News, Health News, Research News, COVID-19 News, Outbreak News, Dengue News, Glaucoma News, Diabetes News, Herb News, Phytochemical News, Heart And Cardiology News, Epigenetic News, Cancer News,

Source: SARS-CoV-2 Coronavirus  May 07, 2021  2 years, 11 months, 1 week, 19 hours, 1 minute ago

BREAKING NEWS: New Research By MIT And NCI Provides Further Evidence Of Controversial Claims That SARS-Cov-2 Genes Can Integrate With Human DNA!

BREAKING NEWS: New Research By MIT And NCI Provides Further Evidence Of Controversial Claims That SARS-Cov-2 Genes Can Integrate With Human DNA!
Source: SARS-CoV-2 Coronavirus  May 07, 2021  2 years, 11 months, 1 week, 19 hours, 1 minute ago
BREAKING NEWS:  Researchers from Massachusetts Institute of Technology-Cambridge, National Cancer Institute-Maryland and the Whitehead Institute for Biomedical Research-Cambridge, have in a new study found further evidence supporting the controversial claims that the SARS-CoV-2 genes is able to integrate into the Human Host DNA.

The study findings were published in the peer reviewed journal: PNAS (Proceedings of the National Academy of Sciences).
When Thailand Medical News covered an initial study done in December 2020 by researchers from Harvard and MIT, a number of ignorant researchers worldwide dismissed the study as being not credible and even as fake.
The study team consisting of prominent scientists has doubled down on its controversial hypothesis that genetic bits of the pandemic coronavirus can integrate into our chromosomes and stick around long after the infection is over.
Interestingly the Viral gene insertions could explain the rare finding that people can recover from COVID-19 but then test positive for SARS-CoV-2 again months later.
Leading stem cell biologist Dr udolf Jaenisch and gene regulation specialist Dr Richard Young of the Massachusetts Institute of Technology, who led the work, triggered a Twitter storm in December 2020, when their team first presented the idea in a preprint on.
Both of them along with their research colleagues emphasized that viral integration did not mean people who recovered from COVID-19 remain infectious.
However ignorant critics charged them with stoking unfounded fears that COVID-19 vaccines based on messenger RNA (mRNA) might somehow alter human DNA.
These so called ‘experts’ cum  critics also presented a brace of scientific criticisms, some of which the team addresses in the new study findings.
Dr Jaenisch told Thailand Medical News, “We now have unambiguous evidence that coronavirus sequences can integrate into the human genome.”
The SARS-CoV-2 has genes composed of RNA, and Jaenisch, Young, and co-authors contend that on rare occasions an enzyme in human cells may copy the viral sequences into DNA and slip them into our chromosomes.

Dr Zhang, Dr Jaenisch and colleagues then examined the DNA flanking the small viral sequences for clues to the mechanism by which they got there. In these surrounding sequences, the researchers found the hallmark of a genetic feature called a retrotransposon.
Sometimes called "jumping genes," transposons are sections of DNA that can move from one region of the genome to another. They are often activated to "jump" in conditions of high stress or during cancer or aging, and are powe rful agents of genetic change.
One common transposon in the human genome is called the LINE1 retrotransposon, which is made up of a powerhouse combination of DNA-cutting machinery and reverse transcriptase, an enzyme that creates DNA molecules from an RNA template (like the RNA of SARS-CoV-2).

The cellular  enzyme, reverse transcriptase, is encoded by LINE-1 elements, sequences that litter 17% of the human genome and represent artifacts of ancient infections by retroviruses. In their original preprint, the researchers presented test tube evidence that when human cells spiked with extra LINE-1 elements were infected with the coronavirus, DNA versions of SARS-CoV-2’s sequences nestled into the cells’ chromosomes.
Numerous genomic and cell biologists who specialize in LINE-1 elements and other “retrotransposons” thought the data were too thin to support the claim.
An ex-critic from Cornell University, Dr Cedric Feschotte, who studies endogenous retrovirus chunks in the human genome regrets, “If I would have had this data, I would have not submitted to any publication at that point.”
Many like him had said when the first study came out that they expected higher quality work coming from scientists of the caliber of Dr Jaenisch and Dr Young.
In two subsequent studies, both posted on bioRxiv, critics presented evidence that the supposed chimeras of human and viral DNA traces are routinely created by the very technique the group used to scan for them in chromosomes.
As one report concluded, the human-virus sequences “are more likely to be a methodological product, [sic] than the result of genuine reverse transcription, integration and expression.”
Dr Jaenisch, Dr Young, and colleagues in this news study acknowledge that the technique they used accidentally creates human-viral chimeras. “I think it’s a valid point,” Dr Jaenisch says.
He adds that when they first submitted the paper to a journal, they knew it needed stronger data, which they hoped to add during the review process. But the journal, like many, requires authors to immediately post all COVID-19 results to a preprint server. “I probably should have said screw you, I won’t put it on bioRxiv. It was a misjudgment,” Dr Jaenisch says.
The study team in this new paper provides evidence that artifacts alone can’t explain the detected levels of virus-human chimeric DNA.
The researchers also show that portions of LINE-1 elements flank the integrated viral genetic sequence, further supporting their hypothesis. And they have collaborated with one of the original skeptics, Dr Stephen Hughes of the National Cancer Institute, who suggested an experiment to clarify whether the integration was real or noise, based on the orientation of the integrated viral sequences relative to the human ones.
The study results support the original hypothesis, says Hughes, a co-author of the new paper. “That analysis has turned out to be important,” he says.
“Significantly the integration data in cell culture is much more convincing than what was presented in the preprint, but it’s still not totally clean,&