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Researchers have developed an injectable new drug that blocks HIV from entering cells which offers long-lasting protection from the infection with fewer side effects.
The drug, which was tested in non-human primates, could eventually replace or supplement components of combination drug “cocktail” therapies currently used to prevent or treat the virus.
“This is an exciting new HIV therapeutic option for both prevention and treatment, with a unique mechanism of action compared to other approved drugs,” said study author Michael S. Kay from the University of Utah in the US.
“It has great potential to help patients who suffer from drug resistance as well as those who would benefit from a longer-acting, injectable anti-HIV drug cocktail,” Kay added.
In this new study, published in the journal Proceedings of the National Academy of Sciences (PNAS), the researchers tested a unique drug called CPT31, based on a D-peptide that targets a critical pocket on HIV’s fusion machinery that rarely mutates.
D-peptides are mirror images of naturally occurring peptides.
“To imagine it, think of right and left hands. The building blocks and overall structure of natural peptides are analogous to our left hand versus our right hand for D-peptides,” the researchers said.
Because of that, CPT31 and other D-peptides are not degraded in the body. Therefore, they last much longer than natural peptides, making them especially suitable for a long-acting injectable formulation.
To see if CPT31 could prevent HIV infection, the research team first injected the drug into healthy macaque monkeys starting several days prior to exposure to a hybrid simian-human form of HIV called SHIV.
The monkeys were completely protected from this very high SHIV exposure, much higher than what humans typically encounter, and never developed signs of infection.
Subsequently, the scientists identified the minimum dose of CPT31 needed to confer complete protection, information that will help inform clinical trials.
“We think this drug could be used by itself to prevent HIV infection because initial HIV exposure typically involves a relatively small amount of virus,” Kay said.
This study showed that the vast majority of circulating HIV strains from around the world are potently blocked by CPT31.
“But what about later stages of the disease when there are billions of copies of the virus circulating in the body?” the team asked.
To find out, the researchers gave CPT31 to monkeys with untreated SHIV infections and high viral loads. Over the course of 30 days, the drug significantly lowered the presence of SHIV in their bloodstreams.
In this study, CPT31 by itself effectively kept the virus at an undetectable level for months (until drug administration was discontinued).
“Upcoming human trials, scheduled for later this year, will help determine whether CPT31 is safe and effective in humans,” the team noted. (IANS)
Hackers have stolen crypto tokens worth $120 million from Blockchain-based decentralised finance (DeFi) platform BadgerDAO. Several crypto wallets were drained before the platform could stop the cyber attack. In a tweet, Badger said it has received reports of unauthorised withdrawals of user funds. "As Badger engineers investigate this, all smart contracts have been paused to prevent further withdrawals. Our investigation is ongoing and we will release further information as soon as possible," the company said late on Thursday.
According to the blockchain security and data analytics Peckshield, the various tokens stolen in the attack are worth about $120 million, reports The Verge. According to reports, someone inserted a malicious script in the user interface (UI) of their website. Badger has retained data forensics experts Chainalysis to explore the full scale of the incident and authorities in both the US and Canada have been informed. "Badger is cooperating fully with external investigations as well as proceeding with its own," it said. DeFi is a collective term for financial products and services that are open, decentralised and accessible to anyone. DeFi products open up financial services to anyone with an internet connection and they are largely owned and maintained by their users. While the attack didn't reveal specific flaws within Blockchain tech itself, it managed to exploit the older "web 2.0" technology that most users need to use to perform transactions, according to reports. (IANS/ MBI)
(Keywords: crypto wallets, BadgerDAO, decentralised finance, Blockchain, 120 million, crypto tokens, Hackers)
A total of 120 top Bollywood and other celebrities are expected to attend the wedding of film stars Katrina Kaif and Vicky Kaushal which is scheduled on December 9 in Rajasthan, said Rajendra Kishan, the District Collector (DC) of Sawai Madhopur district of the state on Friday. The District Collector told mediapersons: "These 120 guests shall follow all COVID-19 protocols and fully vaccinated guests will get entry in the much-hyped celebrity wedding."
Kishan said that the organisers have been asked to strictly follow all Covid-19 protocols. Also, those who are not vaccinated, will not be allowed without the negative RT-PCR test report, he added. "We have been informed by organisers that a total of 120 guests are invited to the wedding and the events will take place between December 7 to December 10," he added.
Earlier at 10.30 a.m., Kishan called a meeting which was attended by administrative, police and forest department officials, hotel and event managers to ensure adequate arrangements for crowd control, smooth regulation of traffic, and law and order situation amid the VIP movement. The wedding venue Fort Barwara, that has been converted into a heritage hotel, is situated in the panchayat samiti Chauth Ka Barwara. The venue is around 22 km away from Sawai Madhopur and is around 174 km from Jaipur. Sawai Madhopur district is famous for the Ranthambore National Tiger Reserve and as per reports, the guests are likely to be taken for a tiger safari. (IANS/ MBI)
(Keywords: Rajasthan, December 9, Vicky Kaushal, Katrina Kaif, film stars, celebrities, Bollywood, Katrina-Vicky)
The National Centre for Biological Sciences (NCBS), which confirmed the first two cases of the Omicron variant in Bengaluru on Thursday, is continuously monitoring the situation in four cities - Bengaluru, Hyderabad, New Delhi, and Pune. The NCBS is a part of a consortium of national laboratories performing genomic surveillance across four city clusters. The consortium was established four months ago with support from The Rockefeller Foundation's Pandemic Prevention Institute, and is led by the Centre for Cellular and Molecular Biology (CCMB) in Hyderabad.
Dr Rakesh Mishra at the CCMB said on Friday that the consortium is continuously monitoring the situation in all the four cities and has upscaled its efforts to sequence as many samples as possible Apart from the CCMB and the NCBS, the consortium includes CSIR-Institute of Genomics and Integrative Biology - IGIB in New Delhi and the Pune Knowledge Cluster, Indian Institute of Science Education and Research (IISER), Pune, and CSIR-National Chemical Laboratory in Pune.
The first case of the Omicron variant was detected in South Africa and reported to the World Health Organization on November 24. | Unsplash
The consortium is focused on upscaling genomic surveillance as part of national efforts led by the INSACOG - Indian SARS-CoV-2 Genomics Consortium - to respond to the Covid-19 pandemic. The consortium intensified its sequencing efforts after the World Health Organisation announced Omicron as a Variant of Concern. Such an intensified effort enabled the Bengaluru team at the NCBS, a member laboratory of INSACOG, in collaboration with Strand Life Sciences and the Bruhat Bengaluru Mahanagara Palike (BBMP), to detect, rapidly sequence and verify the existence of the omicron variant in samples from two Covid-19 infected individuals.
They hope this will aid in a rapid response to contain the spread of variants of concern. Prof Satyajit Mayor from the NCBS conveyed the information to local and national authorities, and the Indian government released a statement on December 2, all within four days of receiving the samples. Both SARS-CoV-2 genomes have also been uploaded to the global repository for SARS-CoV-2 sequences, GISAID, so that they can be publicly available to the scientific community, the NCBS said. (IANS/ MBI)
(Keywords: Hyderabad, New Delhi, Pune, Bengaluru, The National Centre for Biological Sciences, Situation, NCBS, Omicron)