Fibroblasts play a central role in maintaining healthy tissue structures, as well as in the development and progression of diseases. For a long time, these specialised connective tissue cells were thought to represent a single, uniform cell type. A recent publication by researchers at the University of Leipzig Medical Center shows that fibroblasts in human tissue actually consist of distinct populations with specialised functions. This heterogeneity is key to developing targeted therapies in regenerative medicine and in the treatment of diseases. The findings have been published in the renowned journal Nature Cell Biology.
#Mitochondria are flinging their #DNA into our #brain_cells, study shows.
#mtDNA #genome_transfer #insertions #fibroblasts
https://phys.org/news/2024-08-mitochondria-dna-brain-cells.html
New #mechanobiology paper on #cancer #microenvironment. The authors show that cancer-associated #fibroblasts (CAFs) compress tumors with actomyosin supracellular contractility supported by #fibronectin deposition. This induces #YAP nuclear exit in cancer cells, limits cancer growth, and induces tumor reorganization.
Cancer-associated fibroblasts (CAFs) can produce ECM and form a physical barrier around the tumour. Here, the authors show in transgenic mouse models and in vitro systems that CAFs are able to actively compress cancer cells using actomyosin contractility and this leads to a modulation of cancer cell mechanosensing and tumour reorganisation.
`Tail blastema, but not limb, #fibroblasts express sulf1 and form #cartilage under Hedgehog signaling regulation. Depletion of phagocytes inhibits blastema formation, but treatment with pericytic phagocyte-conditioned media rescues blastema chondrogenesis and cartilage formation in amputated limbs... These properties..indicate potential actionable targets for inducing #regeneration in other species, including humans`
Lizards are the closest known relatives of mammals capable of epimorphic tail regrowth. Here, single-cell analysis of regenerating lizard tails reveals a phagocyte-induced fibroblast population contributing to blastema formation and chondrogenesis.