Bacteria inflaming the meninges have developed an immunosuppressive mechanism that contributes to their ability to attack the brain. Researchers found that, by activating pain receptors (nociceptors) to release chemical substances that block an immune cell receptor, Streptococcus pneumoniae and Streptococcus agalactiae deactivated the protective function of macrophages and weakened brain defenses. This, in turn, enabled them to invade the brain.
Cocrystal Pharma Inc., Merck Sharp & Dohme Corp. and MSD R&D (China) Co. Ltd. have jointly patented new cap-dependent endonuclease (CEN) (influenza virus) inhibitors that are reported to be useful for the treatment of influenza.
Even its name is a testament to how enigmatic the tingible macrophage has been. Tingible, which means stainable, certainly gives no clues to its functions – but was, at least, one thing that was known about the cells. Now, scientists at the Garvan Institute of Medical Research have tracked the lifecycle and function of tangible macrophages in the lymph nodes, with implications for understanding autoimmune disorders, which are still poorly understood. Published March 2, 2023, in the journal Cell, the study highlights intravital imaging techniques the scientists used to observe how macrophages formed within the lymph nodes and how they behaved in real time.
Shanghai Aryl Pharmtech Co. Ltd. and Zhejiang Hisun Pharmaceutical Co. Ltd. have jointly patented aromatic acetylene derivatives acting as UDP-3-O-(R-3-hydroxymyristoyl)-N-acetylglucosamine deacetylase (LpxC) (bacterial) inhibitors and reported to be useful for the treatment of gram-negative bacterial infections.
An ongoing outbreak of mpox, a viral disease of zoonotic origin, was confirmed in May 2022 and has affected many countries worldwide. The spread of the virus is due to human-to-human transmission, but it remains unclear whether the responsible mpox strain is adapting to a new host.
A new study found that nebulized mRNA therapy could be an effective approach to treating acute respiratory distress syndrome (ARDS), a rapidly progressing lung disease that can lead to respiratory failure and death. This work focused on two genes, nuclear factor kappaB (NF-κB) inhibitor α super-repressor (IκBα-SR) and superoxide dismutase 3 (SOD3), previously shown to reduce the severity of pneumonia when delivered prophylactically by viral vectors.
Crestone Inc. and the University of Colorado have reported efflux pump (bacterial) inhibitors potentially useful for the treatment of Gram-negative bacterial infections.
Prior to the COVID-19 pandemic, tuberculosis ranked as the leading cause of infectious disease deaths worldwide; the increase of multidrug-resistant Mycobacterium tuberculosis puts some pressure on the search for new tuberculosis therapeutic approaches. Researchers from Sanofi SA and their collaborators have published preclinical results on a sequanamycin – sequanamycin 9 (SEQ-9) – for the potential treatment of tuberculosis.
The intestinal microbiota could protect against HIV infection. At the 30th Conference on Retroviruses and Opportunistic Infections (CROI) last week, a group of scientists from Duke University presented data showing a preventive effect of two bacteria from the Lachnospiraceae family, the species Clostridium immunis and Ruminococcus gnavus against HIV. These microorganisms strongly inhibited HIV replication in vitro through the metabolic pathway of tryptophan and the aryl hydrocarbon receptor.
HIV research is a winding road where one obstacle leads to another, slowing down success. The first barrier to getting the cure starts before one can even talk about it. “Cure may be too powerful and promising a term. Remission is probably better,” said John Mellors, whose work led to the universal use of plasma HIV-1 RNA and CD4+ T-cell counts in HIV-1 infection.
“Cure means maintaining an undetectable viral load off antiretroviral treatment. That means you cannot transmit it to people. Within that definition, there are people that have complete eradication of every single virus. And then, you have people that have a low level of virus that are able to keep under control without drugs,” Sharon Lewin told BioWorld. “Remission is maintaining a viral load less than 50 copies per milliliter in the absence of any retroviral. But there is still virus detectable,” she explained. Lewin is the director of The Peter Doherty Institute for Infection and Immunity in Melbourne, and the president of the International AIDS Society (IAS).
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