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PubMed2026

Efficacy and Safety of Ultra-Low Starting Dose Febuxostat Titration in Male Patients With Primary Gout.

BACKGROUND: Since gout is a common metabolic arthritis caused by urate crystal deposition, urate-lowering therapy (ULT) is clearly indicated, but the initiation of ULT frequently causes paradoxical acute flares that in turn impair patient adherence. OBJECTIVE: This study sought to assess the effectiveness and safety of an ultra-low-dose initiation strategy for febuxostat (10 mg/day) compared to the standard starting dose (20 mg/day) in reducing initiation-related flares while maintaining long-term urate control. METHODS: 120 male patients with primary gout presenting with acute arthritis were randomly assigned to initiate febuxostat at 10 mg/day (Group A) or 20 mg/day (Group B), with protocol-mandated biweekly titration. The primary outcomes were gout flare frequency over 24 weeks (assessed using Poisson regression), serum uric acid (SUA) target attainment, and the incidence of adverse events. RESULTS: Although both groups achieved comparable target SUA levels by week 24, Group A demonstrated a significantly lower overall flare incidence (36.7% vs. 70.0%; p < 0.001), along with a greater percentage of flare-free patients (70.0% vs. 46.7%; p = 0.016). Multivariable Poisson regression revealed that Group B had an approximately twofold higher risk of flares compared to Group A (Incidence Rate Ratio = 1.95; p = 0.012), with obese patients deriving the most pronounced benefit from the ultra-low-dose approach. To avert one additional flare, the calculated number needed to treat was 4.3. Additionally, the occurrence of clinically significant liver injury (ALT/AST > 3× ULN) was low in both groups, with 3.3% in Group A and 1.7% in Group B. Multivariable regression analysis confirmed that LDL-C is an independent predictor of ALT (β = 12.90, p = 0.009), while febuxostat dosage was not linked to hepatotoxicity. CONCLUSION: Initiating febuxostat at a dose of 10 mg/day with gradual titration demonstrates a superior safety profile by effectively reducing early acute flares without compromising long-term urate control, which is particularly advantageous for high-risk cohorts, including obese patients.

Humans↗

PubMed2025

Network pharmacology combined with ultra-high-performance liquid chromatography-quadrupole time-of-flight mass spectrometry method to explore the mechanism of Shizhi Fang in treating uric acid nephropathy mice.

OBJECTIVE: To elucidate the potential mechanisms of Shizhi Fang (SZF, ) in the treatment of uric acid nephropathy (UAN). METHODS: SZF-containing serum was prepared from six male rats and analyzed using ultra-high-performance liquid chromatography-quadrupole time-of-flight mass spectrometry (UPLC-Q-TOF-MS). Network pharmacology was employed was integrated with UPLC-Q-TOF-MS to predict SZF targets for the treatment of UAN, which were subsequently validated through in vivo experiments. Sixty male Bagg Albino Laboratory-Bred Mouse, substrain c mice were randomly allocated into six groups: Normal, Model, Febuxostat, and three SZF dosage groups. Except for the Normal group, all mice were administered potassium oxonate (250 mg/kg) and adenine (50 mg/kg) via gavage to induce UAN. Four hours post-administration, the Febuxostat group received Febuxostat (6 mg/kg), while the SZF groups received low (0.234 g/kg), medium (0.468 g/kg), or high (0.936 g/kg) doses of SZF. The Normal and Model groups were given an equivalent volume of saline. All treatments were conducted over a period of four weeks. Urine and blood samples were collected for biochemical analysis, and kidney tissues were subjected to histopathological examination and Western blot analysis. RESULTS: Nine prototype compounds and 30 metabolites were identified in SZF serum. Network pharmacology analysis revealed 195 drug targets and 1608 disease targets, with 76 common drug-disease targets, including signal transducer and activator of transcription 3 (STAT3), proto-oncogene tyrosine-protein kinase Src (SRC), matrix metalloproteinase-9 (MMP9), Caspase 3, and toll-like receptor 4 (TLR4) as key targets. Gene Ontology analysis identified 325 biological processes, 48 cellular components, and 72 molecular functions, while Kyoto Encyclopedia of Genes and Genomes analysis identified 113 pathways. Molecular docking demonstrated strong binding affinities between active compounds and their targets. In the animal study, SZF treatment alleviated pathological damage and improved serum and urine biochemical markers compared to the Model group (P < 0.05, P < 0.01, P < 0.001). Western blot analysis showed a significant reduction in phosphorylated-STAT3, phosphorylated-SRC, MMP9, TLR4, and Caspase3 expression in renal tissues of SZF-treated mice (P < 0.001). CONCLUSION: SZF may exert therapeutic effects on UAN through multiple targets and pathways.

Animals↗