10,000 Matching Annotations
  1. Aug 2022
  2. Jul 2022
  3. Jun 2022
    1. Using this method, we show white/grey hairs that naturally regain pigmentation across sex, ethnicities, ages, and body regions, thereby quantitatively defining the reversibility of greying in humans. Molecularly, grey hairs upregulate proteins related to energy metabolism, mitochondria, and antioxidant defenses. Combining HPP profiling and proteomics on single hairs, we also report hair greying and reversal that can occur in parallel with psychological stressors. To generalize these observations, we develop a computational simulation, which suggests a threshold-based mechanism for the temporary reversibility of greying.

      https://elifesciences.org/articles/67437

      Researchers have shown that some types of greying hair are reversible.

  4. May 2022
  5. Apr 2022
  6. Mar 2022
  7. Feb 2022
    1. The coronavirus S-protein mediates receptor binding and fusion of the viral and host cell membranes. In HCoV-229E, its receptor binding domain (RBD) shows extensive sequence variation but how S-protein function is maintained is not understood. Reported are the X-ray crystal structures of Class III-V RBDs in complex with human aminopeptidase N (hAPN), as well as the electron cryomicroscopy structure of the 229E S-protein. The structures show that common core interactions define the specificity for hAPN and that the peripheral RBD sequence variation is accommodated by loop plasticity. The results provide insight into immune evasion and the cross-species transmission of 229E and related coronaviruses. We also find that the 229E S-protein can expose a portion of its helical core to solvent. This is undoubtedly facilitated by hydrophilic subunit interfaces that we show are conserved among coronaviruses. These interfaces likely play a role in the S-protein conformational changes associated with membrane fusion.
  8. Jan 2022
    1. Such opportunities and challenges, best illustrated during the pandemic, lie ahead as medicine moves towards the goal of providing evidence-based care to patients no matter where they live. This trajectory also opens up real opportunities for speed, transparency and rich evaluation across peer review in medicine.

      呼吁医学界提供更为快速、透明、评估更为全面的同行评审创造需求

    2. But even as the pandemic has demonstrated the potential for rapid, author-driven publication to democratize access and accelerate research, it has exposed the challenges of this model of scholarly communication

      作者驱动的快速出版 面向大众开放 促进研究

  9. Dec 2021