👤 Valerie Risson

IL-27, a cytokine with pleiotropic immunomodulatory functions, has garnered increasing attention in the context of tumor immunity, and its role in the tumor microenvironment (TME) is complex and just beginning to unravel. IL-27 is pivotal in polarizing immune responses toward an antitumor phenotype, promoting T-cell differentiation, enhancing cytotoxicity, and reducing the number of immunosuppressive elements within the tumor microenvironment. It also directly affects cancer cells, inducing apoptosis and inhibiting angiogenesis. However, IL-27 is a double-edged sword that can also promote mechanisms of action, inducing the expression of inhibitory molecules such as PD-L1 or IL-10 and inhibiting the maturation of dendritic cells. Here, we recapitulate the intricate mechanisms of IL-27, providing a comprehensive understanding of its immune-stimulating and immune-suppressing functions in the TME. This challenge is crucial for designing immunotherapies based on IL-27 in cancer. Show less

Skeletal muscles are composed of hundreds of multinucleated muscle fibers (myofibers) whose myonuclei are regularly positioned all along the myofiber's periphery except the few ones clustered underneath the neuromuscular junction (NMJ) at the synaptic zone. This precise myonuclei organization is altered in different types of muscle disease, including centronuclear myopathies (CNMs). However, the molecular machinery regulating myonuclei position and organization in mature myofibers remains largely unknown. Conversely, it is also unclear how peripheral myonuclei positioning is lost in the related muscle diseases. Here, we describe the microtubule-associated protein, MACF1, as an essential and evolutionary conserved regulator of myonuclei positioning and maintenance, in cultured mammalian myotubes, in Show less