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Activated kynurenine pathway metabolism by YKL-40 establishes an inhibitory immune microenvironment and drives glioblastoma development.
Cell Mol Life Sci
December 2024
Shanghai Key Laboratory of Biliary Tract Disease Research, Xinhua Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, 200092, China.
Background: Glioblastoma (GB) is the stage IV of glioma and mesenchymal GB represents the most common and malignant subtype characterized with elevated expression of a mesenchymal marker YKL-40 and resistance to immune drug therapy. Here, we determined if YKL-40 regulates kynurenine (Kyn) pathway (KP) metabolism that contributes to establishing an immune suppressive microenvironment in GB.
Methods: Tumor cells expressing YKL-40 from GB patients were isolated and activated cellular metabolisms were identified via gene microarray analysis.
Quercetin attenuates the symptoms of osteoarthritis and by suppressing ferroptosis via activation of AMPK/Nrf2/Gpx4 signaling.
Mol Med Rep
March 2025
Department of Orthopedics, Beijing University of Chinese Medicine Third Affiliated Hospital, Beijing 100029, P.R. China.
Osteoarthritis (OA) is a common joint disorder involving the cartilage and other joint tissues. Quercetin (QCT) serves a protective role in the development of OA. However, to the best of our knowledge, the regulatory mechanisms of QCT in the progression of OA have not yet been fully elucidated.
View Article and Find Full Text PDFMacrophage Notch1 signaling modulates regulatory T cells via the TGFB axis in early MASLD.
JHEP Rep
January 2025
Department of Pharmacology, Wuhan University TaiKang Medical School (School of Basic Medical Sciences), Wuhan 430071, China.
Background & Aims: Hepatic immune imbalance is crucial for driving metabolic dysfunction-associated steatotic liver disease (MASLD) progression. However, the role of hepatic regulatory T cells (Tregs) in MASLD initiation and the mechanisms responsible for their change are not completely understood.
Methods: A mouse model subjected to a short-term high-fat diet (HFD) to mimic early steatosis, along with liver biopsy samples from patients with simple steatosis, and macrophage-specific Notch1-knockout mice (Notch1), were used to investigate the role of Tregs in early MASLD and the effect of hepatic macrophage Notch1 signaling on Treg frequency.
CXCL16/CXCR6/TGF-β Feedback Loop Between M-MDSCs and Treg Inhibits Anti-Bacterial Immunity During Biofilm Infection.
Adv Sci (Weinh)
December 2024
Guangdong Provincial Clinical Research Center for Orthopedic Diseases, The First Affiliated Hospital of Sun Yat-sen University, Guangzhou, Guangdong, 510080, China.
Staphylococcus aureus (S. aureus) is a leading cause of Periprosthetic joint infection (PJI), a severe complication after joint arthroplasty. Immunosuppression is a major factor contributing to the infection chronicity of S.
View Article and Find Full Text PDFCalmodulin enhances mTORC1 signaling by preventing TSC2-Rheb binding.
J Biol Chem
December 2024
Graduate School of Bioagricultural Sciences, Nagoya University, Furo-cho, Chikusa, Nagoya, Japan. Electronic address:
The mechanistic target of rapamycin complex 1 (mTORC1) functions as a master regulator of cell growth and proliferation. We previously demonstrated that intracellular calcium ion (Ca) concentration modulates the mTORC1 pathway via binding of the Ca sensor protein calmodulin (CaM) to tuberous sclerosis complex 2 (TSC2), a critical negative regulator of mTORC1. However, the precise molecular mechanism by which Ca/CaM modulates mTORC1 activity remains unclear.
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