Metal-metal bonds are not essential for multiply bridging hydride ligands. A tetranuclear μ -hydride complex [(μ -H)Rh (PNNP) (CO) ] (PNNP=3,5-bis(diphenylphosphanylmethyl)pyrazolate), in which the quadruply bridging hydrido ligand holds the four isolated metal centers together to form a tetrahedral metal array, has been prepared and characterized by spectroscopic methods and single-crystal X-ray diffraction.
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http://dx.doi.org/10.1002/1521-3773(20010803)40:15<2865::AID-ANIE2865>3.0.CO;2-5 | DOI Listing |
Nat Commun
December 2024
Department of Urology, Weill Cornell Medicine, New York, NY, USA.
The androgen receptor (AR) is central in prostate tissue identity and differentiation, and controls normal growth-suppressive, prostate-specific gene expression. It also drives prostate tumorigenesis when hijacked for oncogenic transcription. The execution of growth-suppressive AR transcriptional programs in prostate cancer (PCa) and the potential for reactivation remain unclear.
View Article and Find Full Text PDFCancer Discov
October 2024
Department of Obstetrics and Gynecology, Weill Cornell Medicine, New York, New York.
Iron accumulation in tumors contributes to disease progression and chemoresistance. Although targeting this process can influence various hallmarks of cancer, the immunomodulatory effects of iron chelation in the tumor microenvironment are unknown. Here, we report that treatment with deferiprone, an FDA-approved iron chelator, unleashes innate immune responses that restrain ovarian cancer.
View Article and Find Full Text PDFNat Microbiol
July 2024
Department of Physiology and Biophysics, Weill Cornell Medicine, New York, NY, USA.
Maintenance of astronaut health during spaceflight will require monitoring and potentially modulating their microbiomes. However, documenting microbial shifts during spaceflight has been difficult due to mission constraints that lead to limited sampling and profiling. Here we executed a six-month longitudinal study to quantify the high-resolution human microbiome response to three days in orbit for four individuals.
View Article and Find Full Text PDFNat Commun
June 2024
Buck Institute for Research on Aging, Novato, CA, 94945, USA.
Microgravity is associated with immunological dysfunction, though the mechanisms are poorly understood. Here, using single-cell analysis of human peripheral blood mononuclear cells (PBMCs) exposed to short term (25 hours) simulated microgravity, we characterize altered genes and pathways at basal and stimulated states with a Toll-like Receptor-7/8 agonist. We validate single-cell analysis by RNA sequencing and super-resolution microscopy, and against data from the Inspiration-4 (I4) mission, JAXA (Cell-Free Epigenome) mission, Twins study, and spleens from mice on the International Space Station.
View Article and Find Full Text PDFNature
August 2024
Department of Physiology and Biophysics, Weill Cornell Medicine, New York, NY, USA.
Spaceflight induces molecular, cellular and physiological shifts in astronauts and poses myriad biomedical challenges to the human body, which are becoming increasingly relevant as more humans venture into space. Yet current frameworks for aerospace medicine are nascent and lag far behind advancements in precision medicine on Earth, underscoring the need for rapid development of space medicine databases, tools and protocols. Here we present the Space Omics and Medical Atlas (SOMA), an integrated data and sample repository for clinical, cellular and multi-omic research profiles from a diverse range of missions, including the NASA Twins Study, JAXA CFE study, SpaceX Inspiration4 crew, Axiom and Polaris.
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