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Showing 1–16 of 16 results
Advanced filters: Author: "Michael Ohh" Clear advanced filters
  • Cancer cells thrive owing to different means of survival and proliferation. But despite growing understanding of the biology of cancer and the mechanism of tumorigenesis, complete knowledge of what causes cancer is still lacking. There are multiple hypotheses as to what drives cells to become malignant. One of them is the Warburg effect, which supports that an increase in glycolysis over oxidative respiration, even in the presence of oxygen, may be the cause of cancer. But this premise has not yet been confirmed. In 'Bench to Bedside', Michael Ohh peruses a recent study showing a common mutation in people with renal cell carcinoma and melanoma that may rekindle the debate as to whether a metabolic switch is a major driver in cancer and whether it has potential as a therapeutic target. Every so often, an 'old' drug seems to work for a condition that was not previously known. Two recent human studies show that aspirin can prevent colorectal cancer in people genetically predisposed to this disease after several years after treatment. In 'Bedside to Bench', Patrick Maxwell discusses the possible mechanisms of action of aspirin in decreasing the risk of developing colorectal cancer.

    • Michael Ohh
    Comments & Opinion
    Nature Medicine
    Volume: 18, P: 30-31
  • Biophysical analyses based on the crystal structure of PHD2 in complex with HIF2α peptide show that the strength of the interaction between Pacak-Zhuang syndrome-causing HIF2α mutants and PHD2 correlates with disease severity.

    • Fraser G. Ferens
    • Cassandra C. Taber
    • Michael Ohh
    ResearchOpen Access
    Communications Biology
    Volume: 7, P: 1-14
  • Paralogs HIF1α and HIF2α are important modulators regulating cellular transcriptional profile following hypoxia. Here, the authors investigate evolutionary substitutions that fine tune the interaction between HIFα and their regulator VHL in the vertebrate and invertebrate lineages.

    • Daniel Tarade
    • Jeffrey E. Lee
    • Michael Ohh
    ResearchOpen Access
    Nature Communications
    Volume: 10, P: 1-12
  • Deregulation of the RAS GTPase cycle due to mutations in RAS genes is commonly associated with cancer development. Here authors use NMR and mass spectrometry to shows that KRAS phosphorylation via Src alters the conformation of switch I and II regions and thereby impacts the GTPase cycle.

    • Yoshihito Kano
    • Teklab Gebregiworgis
    • Michael Ohh
    ResearchOpen Access
    Nature Communications
    Volume: 10, P: 1-14
  • SHP2 promotes RAS-driven MAPK signalling, but it is unclear why cancer cells with distinct KRAS mutations exhibit differential sensitivity to SHP2 inhibition. Here the authors show that KRAS Q61H is decoupled from SHP2- mediated upstream regulation, thus Q61H pancreatic cancer cells maintain MAPK signalling and are refractory to SHP2 inhibitors.

    • Teklab Gebregiworgis
    • Yoshihito Kano
    • Mitsuhiko Ikura
    ResearchOpen Access
    Nature Communications
    Volume: 12, P: 1-15
  • Aberrant Ras signalling resulting in downstream Mek/Erk pathway activation is found in many cancers. Here, the authors show that the phosphatase SHP2 dephosphorylates Ras resulting in increased Ras activity, and that increased SHP2 activity is found in glioblastomas.

    • Severa Bunda
    • Kelly Burrell
    • Michael Ohh
    ResearchOpen Access
    Nature Communications
    Volume: 6, P: 1-12
  • Hypoxia inducible factor (HIF)-2α transcription factor is mutated in polycythemia and various neuroendocrine tumors. Here the authors present the crystal structure of a HIF-2α peptide bound to the pVHL-elongin B-elongin C (VBC) heterotrimeric complex and propose a classification scheme for HIF-2α mutations that helps to predict disease phenotype outcome.

    • Daniel Tarade
    • Claire M. Robinson
    • Michael Ohh
    ResearchOpen Access
    Nature Communications
    Volume: 9, P: 1-11
  • Individuals with Chuvash polycythemia have an increased red blood cell count and are prone to developing blood clots. Although mutations affecting the VHL protein are known to be causative, the underlying molecular mechanisms have been unclear. Ryan C Russell et al. now show that VHL targets the key signaling molecule JAK2 for degradation by forming a complex with the SOCS1 protein. The authors also show that JAK2 inhibition has beneficial effects in a mouse model of this disease, pointing to a new therapeutic strategy.

    • Ryan C Russell
    • Roxana I Sufan
    • Michael Ohh
    Research
    Nature Medicine
    Volume: 17, P: 845-853
  • Hypoxia promotes tumor growth by stimulating angiogenesis, glycolysis, resistance to apoptosis and cell invasion. Wang et al. now report that hypoxia also increases the duration of growth factor signaling in tumor cells. They show that hypoxia-inducible factor downregulates the expression of an effector of early endosome fusion, slowing the endocytic recycling of epidermal growth factor receptor and thereby extending its activation and potential to enhance tumor cell proliferation and survival (pages 246–247).

    • Yi Wang
    • Olga Roche
    • Michael Ohh
    Research
    Nature Medicine
    Volume: 15, P: 319-324