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Vitamin B2 Operates by Dual Thermodynamic and Kinetic Mechanisms to Selectively Tailor Urate Crystallization.
J Am Chem Soc
January 2025
Department of Chemical and Biomolecular Engineering, University of Houston, Houston, Texas 77204, United States.
Here we demonstrate how a biologically relevant molecule, riboflavin (vitamin B2), operates by a dual mode of action to effectively control crystallization of ammonium urate (NHHU), which is associated with cetacean kidney stones. In situ microfluidics and atomic force microscopy experiments confirm a strong interaction between riboflavin and NHHU crystal surfaces that substantially inhibits layer nucleation and spreading by kinetic mechanisms of step pinning and kink blocking. Riboflavin does not alter the distribution of tautomeric urate isomers, but its adsorption on NHHU crystal surfaces does interfere with the effects of minor urate tautomer by limiting its ability to induce NHHU crystal defects while also suppressing NHHU nucleation and inhibiting crystal growth by 80% at an uncharacteristically low modifier concentration.
View Article and Find Full Text PDFUnlabelled: is a high-priority organism for the development of new antibacterial treatments. We found that the antimalarial medication mefloquine (MFQ) permeabilized the bacterial cell membrane of , decreased membrane fluidity, and caused physical injury to the membrane. MFQ also maintained activity across different pH conditions (PH range 5-8).
View Article and Find Full Text PDFMight Topical Heparin Help With Occlusion Emergencies After Accidental Intra-Arterial Hyaluronic Acid Injections?
Aesthet Surg J Open Forum
December 2024
Hyaluronic acid fillers rarely cause potentially devastating occlusive adverse events that require immediate hyaluronidase salvage infiltrations. An exploratory photographic investigation probed whether topical heparin's anticlotting and anti-inflammatory properties could synergize with and enhance the effectiveness of hyaluronidase. Based on heparin pharmacodynamics, the authors explored the rationale for associating topical heparins with hyaluronidase in treating occlusive side effects following accidental intra-arterial hyaluronic acid injections.
View Article and Find Full Text PDFSynergizing Digital and Physical Approaches: Experience Summary of the HIV PrEP Promotion Project.
China CDC Wkly
January 2025
National Center for AIDS/STD Control and Prevention, Chinese Center for Disease Control and Prevention, Beijing, China.
China's human immunodeficiency virus / acquired immune deficiency syndrome (HIV/AIDS) prevention and control efforts have entered a new stage, necessitating the exploration of more effective intervention strategies. HIV pre-exposure prophylaxis (PrEP) is a proven method to prevent HIV infection, but its promotion in China faces challenges such as low public acceptance and inadequate service capacity. To further promote PrEP, the "HIV PrEP Model Exploration Project" was launched, exploring three PrEP service models: PrEP clinics, Digital services and physical testing, and PrEP self-service vending machines.
View Article and Find Full Text PDFPifithrin-μ sensitizes mTOR-activated liver cancer to sorafenib treatment.
Cell Death Dis
January 2025
Department of Organ Transplantation and Hepatobiliary Surgery, Key Laboratory of Organ Transplantation of Liaoning Province, The First Hospital of China Medical University, Shenyang, China.
TSC2, a suppressor of mTOR, is inactivated in up to 20% of HBV-associated liver cancer. This subtype of liver cancer is associated with aggressive behavior and early recurrence after hepatectomy. Being the first targeted regimen for advanced liver cancer, sorafenib has limited efficacy in HBV-positive patients.
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