Orbital Therapeutics Inc. has presented preclinical results supporting the development of OTX-201, a potential best-in-class in vivo CAR T therapy that comprises an optimized circular RNA encoding a CD19-targeted CAR delivered via targeted lipid nanoparticles.

We all look different to HIV, a virus that destroys the immune system. The defensive cells record every interaction with foreign agents, infections from viruses and bacteria, but also with mechanisms occurring within the body, such as microbiome metabolism, the effects of aging, or the development of diseases. At a preconference session at the 13th IAS Conference on HIV Science (IAS 2025), scientists explained the interactions of different microorganisms with HIV.

Graves disease (GD)-associated hyperthyroidism is an autoimmune disorder characterized by the presence of autoantibodies that stimulate the thyroid-stimulating hormone receptor (TSHR), leading to excessive production of thyroid hormones.

There is still no effective vaccine or cure for HIV. Scientists are considering options ranging from longer-term antiretroviral therapy (ART) that space out injections by several years to long-lasting pre-exposure prophylaxis (PrEP) that acts as a vaccine while immunization is achieved. What else can be done? The “Innovations in HIV virology: Translating discoveries into novel therapies” symposium in basic science at the 13th IAS Conference on HIV Science (IAS 2025), which took place from July 13 to 17, 2025, in Kigali, Rwanda, showcased some of the new ideas that the scientific community are developing.

The U.S. FDA has cleared Genetic Leap’s IND application for GL-IL2-138, a small-molecule RNA drug that modulates natural IL-2, allowing for downregulating or upregulating of the immune system to fight diseases.

Illimis Therapeutics Inc. raised ₩58 billion (US$42 million) in a series B financing round. The funds will support development of ILM-01, its lead bispecific fusion protein candidate, into preclinical development for Alzheimer’s disease by the second half of 2025, along with the company’s neuroimmunology portfolio.

While people living with HIV can lead virtually normal lives thanks to antiretroviral therapy (ART), HIV persists in a latent state within cellular reservoirs that scientists do not know how to eliminate. “Transcription is a critical step in the viral life cycle. … But there are currently no drugs suppressing HIV transcription, and that may be one of the reasons why current antiretroviral therapy is not curative,” Melanie Ott told the audience at the 13th IAS Conference on HIV Science this week in Kigali, Rwanda.

The OX40/OX40L costimulatory pathway is crucial for effective T-cell activation and is inducibly expressed in response to immunological stimulation. Targeting OX40L has demonstrated safety and efficacy in preclinical studies using nonhuman primate models of kidney and heart transplantation.

Degradation is a therapeutic strategy that could offer possibilities to get at currently undruggable target proteins. In targeted degradation, compounds induce interactions between a target protein and a protein that can tag the target for degradation. In principle, there are several pathways that could be used for such tagging; the most attention has gone to ubiquitin ligases, in particular cereblon, a protein that is part of a ubiquitin ligase complex and the target of several approved drugs.