7-Hydroxyflavone Mitigates Osteoporosis Via Key Signaling Pathways in a Dexamethasone-induced Rat Model.

IF 2.9 4区 医学 Q3 CHEMISTRY, MEDICINAL
Kadirvel Devi, Thukani Sathanantham Shanmugarajan, Velayutham Ravichandiran
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引用次数: 0

Abstract

Background: Osteoporosis is a deteriorating skeletal bone disorder that affects in a silent, asymptomatic way. On-demand for new therapeutic strategies, natural products have gained attention as a significant alternative for treating osteoporosis. 7-Hydroxyflavone (7HF) is one of the well-known natural flavones for its anti-inflammatory, anti-oxidant, anti-diabetic, and neuroprotective, which was investigated at the molecular level for restoring bone homeostasis against dexamethasone-induced osteoporosis in vivo with a focus on modulation of oxidative stress (caspase- 3), GATA-3, and NF-kB signaling along with in silico ADMET analysis.

Methods: Adult male rats were divided into four groups, containing six in each group. I- Control, II- Dexamethasone (Dexa)-treated disease control, III & IV - 7HF treated group (50, 100mg/kg). Animals in all groups, except the control, were injected with dexamethasone sodium phosphate at the dose level of 7mg/kg, intramuscularly, once a week for five weeks. The third and fourth group animals received 7HF-1 and 7HF-2 as a fine suspension with 2% carboxy methyl cellulose at a dose of 50 and 100mg/kg, respectively, by oral route once daily, starting from the second week of dexamethasone treatment. At the end of the 5th week, blood was collected from the femoral vein after anaesthesia, and the femur bones were dissected. Histopathology, immunohistochemistry of bone, biochemical serum analysis for ALP, TRAP 5b, RANKL, OPG, antioxidants and cytokines, as well as protein expression for RunX2, Bcl2 and Bax were performed. In addition, an analysis of absorption, distribution, metabolism, excretion, and toxicity (ADMET) was conducted for 7HF.

Results: Immunohistochemistry of GATA-3, NF-kB, and caspase-3 on femur bone sections evidenced the suppression of dexamethasone-induced osteoporosis by 7HF. It was found that 7HF lowered the serum levels of cytokines, ALP, TRAP 5b, and RANKL. 7HF elevated the serum level of antioxidants and OPG. In addition, the protein expression of RunX2, and anti-apoptotic Bcl2 was elevated, and the level of pro-apoptotic Bax in rat femur bone tissues was reduced through the use of 7HF. The aforementioned effects of 7HF were more prominent at the dose of 100mg/kg (p<0.001). 7HF exhibited good solubility and efficient absorption in the human intestine, though it showed limited permeability in MDCK cells. It demonstrated positive BBB permeability and Caco- 2 permeability values. 7HF interacted with P-glycoprotein, had an optimal VD, high PPB, and was a substrate and inhibitor of CYP450 enzymes. It functioned effectively as a hERG blocker without inducing human hepatotoxicity. Comprehensive toxicity assessments highlight 7HF as a more suitable option for drug development.

Conclusions: The study data confirmed that concurrent treatment of 7HF showed evident effects in the protection against dexamethasone-induced osteoporosis through the modulation of the GATA- 3/Caspase-3/NF-KB pathway. Collectively, the ADMET analysis suggests that 7HF possesses promising pharmacokinetic and toxicological attributes, making it a viable candidate for drug development.

在地塞米松诱导的大鼠模型中,7-羟黄酮通过关键信号通路减轻骨质疏松症
背景:骨质疏松症是一种恶化的骨骼骨骼疾病,以沉默、无症状的方式影响。对于新的治疗策略,天然产物作为治疗骨质疏松症的重要选择而受到关注。7-羟基黄酮(7-Hydroxyflavone, 7HF)是一种众所周知的天然黄酮,具有抗炎、抗氧化、抗糖尿病和神经保护作用。研究人员在分子水平上研究了7-羟基黄酮在地塞米松诱导的骨质疏松症中恢复骨稳态的作用,重点研究了氧化应激(caspase- 3)、GATA-3和NF-kB信号的调节以及硅ADMET分析。方法:将成年雄性大鼠分为4组,每组6只。ⅰ-对照组,ⅱ-地塞米松治疗组,ⅲ、ⅳ- 7HF治疗组(50、100mg/kg)。除对照组外,其余各组动物均以7mg/kg剂量肌肉注射地塞米松磷酸钠,每周1次,连用5周。第三组和第四组从地塞米松治疗第2周开始,分别口服7HF-1和7HF-2,以2%羧甲基纤维素为细悬液,剂量分别为50和100mg/kg,每日1次。第5周末,麻醉后股骨静脉采血,并解剖股骨骨。进行组织病理学、骨免疫组化、血清生化分析ALP、TRAP 5b、RANKL、OPG、抗氧化剂、细胞因子、RunX2、Bcl2、Bax蛋白表达。此外,对7HF进行了吸收、分布、代谢、排泄和毒性(ADMET)分析。结果:7HF对股骨骨切片GATA-3、NF-kB、caspase-3的免疫组化检测表明7HF对地塞米松所致骨质疏松有抑制作用。结果发现7HF降低了血清细胞因子、ALP、TRAP 5b和RANKL水平。7HF升高血清抗氧化剂和OPG水平。7HF可提高大鼠股骨骨组织中RunX2、抗凋亡Bcl2的蛋白表达,降低促凋亡Bax的水平。结论:本研究数据证实,7HF同时治疗通过调节GATA- 3/Caspase-3/NF-KB通路,对地塞米松所致骨质疏松具有明显的保护作用。总之,ADMET分析表明7HF具有良好的药代动力学和毒理学特性,使其成为药物开发的可行候选物。
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来源期刊
CiteScore
6.40
自引率
2.90%
发文量
186
审稿时长
3-8 weeks
期刊介绍: Current Topics in Medicinal Chemistry is a forum for the review of areas of keen and topical interest to medicinal chemists and others in the allied disciplines. Each issue is solely devoted to a specific topic, containing six to nine reviews, which provide the reader a comprehensive survey of that area. A Guest Editor who is an expert in the topic under review, will assemble each issue. The scope of Current Topics in Medicinal Chemistry will cover all areas of medicinal chemistry, including current developments in rational drug design, synthetic chemistry, bioorganic chemistry, high-throughput screening, combinatorial chemistry, compound diversity measurements, drug absorption, drug distribution, metabolism, new and emerging drug targets, natural products, pharmacogenomics, and structure-activity relationships. Medicinal chemistry is a rapidly maturing discipline. The study of how structure and function are related is absolutely essential to understanding the molecular basis of life. Current Topics in Medicinal Chemistry aims to contribute to the growth of scientific knowledge and insight, and facilitate the discovery and development of new therapeutic agents to treat debilitating human disorders. The journal is essential for every medicinal chemist who wishes to be kept informed and up-to-date with the latest and most important advances.
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