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Inhibition of nitric oxide synthase transforms carotid occlusion-mediated benign oligemia into large cerebral infarction.
Theranostics
January 2025
Department of neurology, Dongguk University Ilsan Hospital, Goyang 10326, Republic of Korea.
It remains unclear why unilateral proximal carotid artery occlusion (UCAO) causes benign oligemia in mice, yet leads to various outcomes (asymptomatic-to-death) in humans. We hypothesized that inhibition of nitric oxide synthase (NOS) both transforms UCAO-mediated oligemia into full infarction and expands pre-existing infarction. Using 900 mice, we i) investigated stroke-related effects of UCAO with/without intraperitoneal administration of the NOS inhibitor (NOSi) N-nitro-L-arginine methyl ester (L-NAME, 400 mg/kg); ii) examined the rescue effect of the NO-donor, molsidomine (200 mg/kg at 30 minutes); and iii) tested the impact of antiplatelet medications.
View Article and Find Full Text PDFNatural small molecule hinokitone mitigates NASH fibrosis by targeting regulation of FXR-mediated hepatocyte apoptosis.
J Adv Res
December 2024
Department of Pharmacology, School of Basic Medical Sciences, Peking University Health Science Center, 38 Xueyuan Road, Haidian District, Beijing 100191, China; State Key Laboratory of Vascular Homeostasis and Remodeling, State Key Laboratory of Natural and Biomimetic Drugs, NHC Key Laboratory of Cardiovascular Molecular Biology and Regulatory Peptides, Peking University, Beijing 100191, China; Beijing Key Laboratory of Molecular Pharmaceutics and New Drug Delivery Systems, Beijing 100191, China. Electronic address:
Introduction: Liver fibrosis is the common fate of NASH and poses a major health threat with very limited pharmacological treatments.
Objectives: This study aims to investigate the preventive effect of hinokitone (HO), an isolated compound from Agathis dammara, on NASH fibrosis and its underlying mechanism.
Methods: To investigate the effect of HO on NASH fibrosis, C57BL/6 mice were either fed a high-fat diet (HFD) in conjunction with intraperitoneal injection of CCl for 8 weeks or single CCl for 14 days to establish mouse liver fibrosis model, and HO was administered by gavage simultaneously.
Bacteria-specific modified nucleoside is released and elevated in urine of patients with bacterial infections.
mBio
January 2025
Department of Molecular Physiology, Faculty of Life Sciences, Kumamoto University, Kumamoto, Japan.
Unlabelled: Over 170 types of chemical modifications have been identified in cellular RNAs across the three domains of life. Modified RNA is eventually degraded to constituent nucleosides, and in mammals, modified nucleosides are released into the extracellular space. By contrast, the fate of modified nucleosides in bacteria remains unknown.
View Article and Find Full Text PDFOvarian tumor cells gain competitive advantage by actively reducing the cellular fitness of microenvironment cells.
Nat Biotechnol
December 2024
Department of Surgery, Virginia Commonwealth University School of Medicine, Richmond, VA, USA.
Article Synopsis
- The study investigates how cancer cells influence the fitness of surrounding tumor microenvironment (TME) cells through a mechanism involving a long non-coding RNA called Tu-Stroma, which alters the expression of Flower isoforms, impacting their growth advantage.
- The expression of Flower Win isoforms in cancer cells enhances their dominance over TME cells that express Flower Lose isoforms, leading to reduced fitness in the TME.
- Targeting Flower proteins with a humanized monoclonal antibody in mice has shown promising results, significantly reducing cancer growth and metastasis while improving survival rates and protecting organs from potential lesions.
Size-dependent translocation and lymphatic transportation of polymeric nanocarriers post intraperitoneal administration.
J Control Release
December 2024
School of Pharmacy, Fudan University, Key Laboratory of Smart Drug Delivery, Ministry of Education, Shanghai 201203, China. Electronic address:
Intraperitoneal (i.p.) administered nanomedicine has been widely applied in the clinical treatment of intra-abdominal diseases and preclinical pharmacological investigations.
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