The Nobel Prize in Physiology or Medicine 2022 was awarded to Svante Pääbo today "for his discoveries concerning the genomes of extinct hominins and human evolution." Pääbo, who is currently the director of the Max Planck Institute for Evolutionary Anthropology in Leipzig, Germany, and his colleagues overcame extreme technical challenges to sequence the DNA of ancient hominids – because after tens of thousands of years, there is no such thing as aging well for DNA.
Cancer-associated fibroblasts (CAF) expressing the LRRC15 protein (leucine-rich repeat-containing protein 15) could be responsible for the suppression of antitumor immunity, according to a study using mouse models of pancreatic cancer. Scientists from Roche Holding AG subsidiary Genentech Inc. demonstrated in vivo that TGF-β type 2 receptor signaling in healthy universal fibroblasts produces cancer-associated LRRC15+ myofibroblasts.
A Mayo Clinic study demonstrated how the deficiency of the enzyme CDK12 or its regulation by cyclin K causes the expression of mutations related to resistance to endocrine therapy in prostate cancer. Prostate tumors with CDK12 deficiency are more aggressive, recurrent, produce metastases and are associated with castration-resistant prostate cancer (CRPC). CDK12 deficiency impairs DNA repair and increases genomic instability, causing an effect known as homologous recombination deficiency or BRCAness.
The coagulation factor XI (FXI) from the liver acts as an endocrine molecule in the heart, protecting it from heart failure. Scientists at the University of California, Los Angeles (UCLA) found that this communication between the two organs is mediated by the interaction between FXI and a heart protein. This interaction activated genes in cardiomyocytes that reduced inflammation, fibrosis and diastolic dysfunction, protecting the heart from a heart attack. That FXI participates in preventing heart failure suggests the possibility of using it as a therapeutic target.
A simple injection of muscle tissue could control glucose in patients with type 2 diabetes (T2D). Genetic modification of skeletal muscle and subsequent intramuscular implantation could increase blood sugar absorption and become an effective and long-lasting treatment for this pathology. “We took mice satellite cells and we genetically altered to overexpress GLUT4,” Hagit Shoyhet, researcher at the Levenberg lab of stem-cell and tissue engineering, Technion (Israel), said at the European Association for the study of Diabetes (EASD) 58th Annual Meeting.
Synthetic cells (SCs) armed with recombinant growth factors could contribute to tissue regeneration and healing by promoting angiogenesis. This technology opens the door to its application in other therapies such as transplants that require the remodeling or formation of new blood vessels. In addition, they mark the way to produce intracorporeal biological drugs or the inhibition of the angiogenesis process itself when it comes to blocking the irrigation of a tumor.
Scientists from the University of Lisbon have described how telomeres can establish the maximum damage that a cancer cell can suffer. Above this threshold, the cell would stop dividing and die. The damage comes from the transcription of the telomeres themselves of an RNA molecule called TERRA. When TERRA’s levels increase, the cell can no longer multiply. This mechanism occurs in ALT (alternative lengthening of telomeres) cells, which do not elongate their telomeres through telomerase.
Sex differences at the cellular level could explain why men respond less well to glioblastoma (GBM) treatments, according to a study led by the Washington University School of Medicine in St. Louis (WUSTL). The researchers found that male and female GBM tumor cells had different metabolic needs. GBM cells from male surgical samples absorbed more glutamine and had different nutritional preferences for amino acids.
A new study has unveiled the signaling cascade involved in the progression of brain metastasis from breast cancer. A family of connexins participates in the process that regulate the expression of laminins that favor metastatic cells to colonize the brain.
The design of genetically modified exosomes that combine multiple targets killed cancer cells and conferred immunity against them. Scientists at the University of Southern California (USC) applied bioengineering techniques to introduce up to four antitumor functions in the same type of extracellular vesicles and destroy EGFR-positive triple-negative breast cancer (TNBC) tumor cells.
