An Icelandic genome-wide association study that linked variants in a gene which regulates retinoic acid synthesis to severe osteoarthritis (OA) of the hands, has led on to the discovery of an anti-inflammatory role for the vitamin A metabolite and pointed to a new class of potentially disease-modifying drugs. A proof-of-concept clinical trial of talarozole, a retinoic acid metabolism blocking agent, is now taking place to assess if increasing retinoic acid production suppresses inflammation in the joint tissues of patients with OA.

The first in vivo cell atlas of senescent tissue in skeletal muscle has identified the damaging properties of these cells and explained why they block muscle regeneration. According to a study at Pompeu Fabra University led by scientists from Altos Labs Inc., cell damage caused the senescence of the cells, which secreted toxic substances into the surrounding microenvironment, causing fibrosis and preventing tissue regeneration.

To date, there are no current orally available compounds that promote bone formation for treating osteoporosis; most treatments act by inhibiting osteoclastic bone resorption, leading to increased bone mineral density and reduced hip fracture rate in a modest way. Analogues of parathyroid hormone (PTH) are the most frequently used bone anabolic agents, which even though effective, they require daily injections.

Silo Pharma Inc. plans to initiate a pilot study of SPU-21, its novel joint-homing peptide targeting rheumatoid arthritis (RA), in human synovial tissue surrounding joints and tendons.

Now, researchers at Stanford University School of Medicine have shown that by targeting CD47 – better known for its role as an innate immune checkpoint akin to PD-1 and CTLA-4 in the adaptive immune system – they were able to restore muscle stem cell function. Aged mice regained muscle strength comparable to younger animals after receiving an antibody treatment targeting CD47 signaling in muscle stem cells.