釉基质衍生物促进牙周再生及创面愈合的生物学作用

釉基质衍生物是近年来生物医学研究的热点之一,它对促进牙周再生、创面愈合有广阔的应用前景。该文对其在这方面近期国内外研究成果作综述。     

舒芬太尼在口腔颌面外科手术麻醉中的应用与研究

舒芬太尼是芬太尼N-4位取代的衍生物,镇痛效果是芬太尼的5~10倍,并具有起效快、心血管系统功能稳定、无组胺释放等特点[1]。本研究将舒芬太尼用于颌面外科患者,评价其镇痛效果和安全性。1资料与方法1.1一般资料60例颌面外科择期全麻手术患者,男,36例,女24例,年龄17~66岁,,平均年龄39.4岁,ASAⅠ~Ⅱ级,既往无药物成瘾史、癫痫病史和肝肾功能损害。病种包括颌面部骨折、颌面部畸形、颌面部肿瘤、颞颌关节病等。随机分为舒芬太尼(Suf)组和芬太尼(Fen)组,每组30例。1.2麻醉方法麻醉前30min肌肉注射哌替啶1mg/kg、异丙嗪0.5mg/kg和阿托品0.01mg…     

UPLC-MS/MS法测定大鼠血浆中抗耐多药结核活性化合物macozinone(PBTZ 169)浓度及其药代动力学研究

目的:建立UPLC-MS/MS法测定抗耐多药结核新型活性化合物macozinone (PBTZ 169)在大鼠血浆中的浓度,并应用于大鼠体内的药代动力学研究。方法:以卡马西平为内标,经乙腈沉淀蛋白后,采用XBridge?BEH C₁₈(100 mm×2.1 mm, 2.5μm)色谱柱,以乙腈-0.1%甲酸水为流动相,进行梯度洗脱分离,流速0.5 mL·min^-1,进样量10μL;采用电喷雾离子源(ESI),正离子扫描,分别以m/z 457.2→344.1和m/z 237.2→194.2作为PBTZ 169和内标(卡马西平)的质谱检测条件。大鼠灌服20 mg·kg^-1 PBTZ 169后,不同时间点取样测定其血浆浓度,计算药代动力学参数并进行统计分析。结果:PBTZ 169质量浓度在0.7～740.0 ng·mL^-1范围内线性关系良好(r>0.996 0);PBTZ 169和内标的提取回收率在99.5%～110.2%;日内、日间的RSD范围为1.3%～4.2%;PBTZ 169血浆样品在室温下放...     

海洋来源 (+)-sclerotiorin衍生物的半合成、抗结核活性与初步构效关系研究

目的 结核病仍然是世界范围内一个重要的公共卫生问题,因此迫切需要寻找新型抗结核分子。以海洋天然产物(+)-sclerotiorin为原料半合成一系列衍生物,其中包含18个新化合物,通过考察它们的抗结核等活性,探究其初步构效关系。方法 利用Mycobacterium marinum 和 Mycobacterium tuberculosis 菌株对衍生物的生物活性进行测定。结论 衍生物4, 5, 8?10和12的抗海分枝杆菌活性与阳性药相当,MIC90值在16.1?18.9 μM之间。此外,衍生物9, 11, 12和15也显示出中等的抗结核活性。初步构效关系表明喹啉、异喹啉、联苯和联苯醚等基团有利于提升(+)-sclerotiorin衍生物的抗结核活性。衍生物12在结核杆菌蛋白酪氨酸磷酸酶B抑制试验中显示出最强的活性,分子对接的结果表明,它与蛋白的Phe98残基之间存在苯环与苯环间的π-π相互作用。该研究证实了(+)-sclerotiorin衍生物作为抗结核候选药物的潜力。     

Synthesis of matrine derivative ZS10 and its mechanism of apoptosis induced by PI3K/AKT signaling pathway in human hepatocellular carcinoma cell line BEL-7402北大核心CSCD

Aim To explore the signaling pathway of matrine derivative ZS10 in inhibiting proliferation and inducing apoptosis of BEL-7402 cells. Methods ZS10 was synthesized by organic synthesis. The inhibitory effect of ZS10 on the proliferation of BEL-7402 cells was analyzed by MTT method at the time of 24 h, 48 h and 72 h, respectively, and IC50 was calculated. DAPI staining was used to observe the state of BEL-7402 cells. Clone formation method was used to observe the colony formation of BEL-7402 cells, flow cytometry was used to observe the cell cycle arrest and apoptosis of BEL7402 cells, and Western blot was used to detect the expression level of PI3K/AKT pathway and related proteins. Results MTT results showed that the IC50 was(6.62±1.11)μmol·L-1; DAPI staining showed that the cell state changed significantly with the increase of drug concentration, and the results of colony formation showed that ZS10 significantly inhibited the colony formation of BEL-7402 cells. The results of flow cytometry showed that ZS10 induced S phase arrest and cycle apoptosis of BEL-7402 cells. Western blot showed that ZS10 at the concentration of 0～8 μ mol·L-1 could regulate the PI3K/AKT pathway and its related proteins in a dose-dependent manner. Compared with the control group, the expression of PI3K, AKT, P-AKT and anti-apoptotic protein Bcl-2 significantly decreased, the expression of pro-apoptotic protein Bax significantly increased, the expression of Cyclin D1 and CDK2 significantly decreased, and the expression of EGFR and N-cadherin, Vimentin significantly decreased in the treatment group. The expression of E-cadherin increased. Conclusions Matrine derivative ZS10 can inhibit the growth and proliferation of hepatocellular carcinoma cell line BEL-7402. © 2023 Publication Centre of Anhui Medical University. All rights reserved.     

Molecular mechanism of a Matijin-su derivative for inhibiting proliferation,invasion and migration of prostate cancer cells北大核心CSCD

目的探讨马蹄金素衍生物HXL130对前列腺癌PC3细胞的增殖、侵袭及迁移的影响及其分子机制。方法采用MTT法检测HXL130对PC3细胞增殖的影响,Hoechst 33258染色和流式细胞术检测对癌细胞凋亡以及对其细胞周期的影响,运用Transwell法检测对癌细胞侵袭与迁移的影响;运用蛋白组学测序技术检测化合物处理癌细胞引起的差异表达蛋白(DEPs),分析DEPs的功能及其调控的相关信号通路,并运用Western blot进行验证。结果PC3细胞成活率随着HXL130浓度和时间的增加而降低,且可明显的诱导细胞凋亡和阻滞G 2期,并可明显的抑制PC3细胞的侵袭和迁移能力;蛋白质组学分析表明,HXL130处理癌细胞引起67个蛋白发生差异表达,包括51个上调蛋白和16个下调蛋白,其主要参与PI3K-AKT、MAPK、细胞凋亡及内质网蛋白处理相关信号通路;Western blot结果研究表明HXL130可明显促进细胞中上述信号通路中的关键蛋白PERK、p-elF2α、CHOP、Bax蛋白表达,抑制Bcl-2、MMP1和VEGF的蛋白表达。结论马蹄金素衍生物HXL130可抑制PC3细胞的增殖和转移,其分子机制主要涉及到PI3K-AKT、MAPK、细胞凋亡及内质网蛋白处理相关信号通路的调控。     

Pharmacokinetics and blood-brain barrier penetration of a novel salidroside derivative pOBz in rats北大核心CSCD

Aim To develop a ultra-high performance liquid chromatography electrospray-ionization tandem mass spectrometry ( UPLC-MS/MS ) method for the simultaneous determination of salidroside derivative pOBz in rat plasma and brain tissue, and to study the pharmacokinetic profile and penetration of the blood-brain barrier in rats after a single dose intravenous administration of pOBz. Methods SD rats were administered pOBz at a dose of 50 mg • kg -1via tail vein, and plasma and brain tissue samples were collected at different time points. UPLC-MS/MS method was used to determine the concentration of pOBz in plasma and brain tissue. The plasma concentration-time curve was fitted by DAS 2. 1. 1 software to calculate the pharmacokinetic parameters of pOBz. Results The linear regression equation of pOBz in plasma was: Y = 0.062 3X + 0.024 8 , r2=0.999, and the linear range was 0. 2 ~ 200 mg • L-1; the linearity regression equation in brain homogenate was : Y = 0.065 1X + 0.0317 , r2= 0.997, and the linear range was 0.2 ~ 200 mg • L -1. The half-life T1/2 of pOBz in plasma was 1.03 h,the area under the drug-time curve AUC0_twas 198.4 h • mg • L -1the mean residence time MRT0_twas 0.87 h, and the clearance rate CL was 0. 246 L • h-1• kg-1. 5 min after administration, pOBz could be detected in brain tissue at a concentration of 1.21 mg • L-1; it was not completely eliminated 3 h after administration. Conclusions The UPLC-MS/MS method is accurate and applicable for the pharmacokinetic study of pOBz in plasma and brain homogenate. pOBz can penetrate the blood-brain barrier and exert pharmacological effects in central nervous system. © 2023 Publication Centre of Anhui Medical University. All rights reserved.     

小檗碱及其衍生物的抗肥胖作用

肥胖是长期能量摄入与消耗不平衡而引起的一种慢性代谢性疾病,与脂肪组织的异常增殖与肥大密切相关,抑制前脂肪细胞的增殖和分化也是抑制肥胖的一种方法。近些年,小檗碱（BBR）被发现具有抑制脂肪细胞增殖分化和脂质积累的能力,并通过PI3K-AKT、Ucp1、AMPK、AMPK-PGC1α轴影响脂肪细胞分化的进程。本篇综述介绍了BBR对脂肪细胞增值分化、脂质积累和脂肪产热的影响,从而为BBR如何通过脂肪产热帮助预防和管理肥胖的干预策略提供新的见解。     

治疗黑色素瘤的新型二芳基衍生物04022a在不同种属肝微粒体中的稳定性及代谢产物分析

目的 采用SD大鼠、人、比格犬的肝微粒体酶,考察新型二芳基衍生物04022a在3个种属肝微粒体中的代谢稳定性,比较代谢的种属差异,并对产生的代谢产物进行筛选与结构表征。方法 将04022a溶解在由NADPH启动的肝微粒体孵育体系中,孵育0 、15 、30 、60 、90 、120 min后,加入等体积的冰甲醇终止反应。采用高效液相色谱法测定04022a的质量浓度,计算各个时间点的剩余药物百分比、体外半衰期（t_1/2）和固有清除率（CL_int）。采用超高效液相色谱串联飞行时间质谱法对04022a在肝微粒体中的代谢产物进行检测与分析。结果 孵育120 min时,04022a在大鼠、人、比格犬肝微粒体中的剩余药物百分比分别为88.30%、82.15%、98.63%。t_1/2分别为770、364、3 465 min,CL_int分别为0.001 8、0.003 8、0.000 4 mL•（min•mg）^-1。初步判断04022a在3个种属共有5个体外代谢产物。结论 04022a在各种肝微粒体中的代谢稳定性良好,主要代谢转化途径包括脱烷基化、羟基化、脱氢。     

蛇床子素/壳聚糖衍生物胶束对去卵巢骨质疏松大鼠骨微结构和骨吸收的影响

目的观察蛇床子素/壳聚糖衍生物胶束(Osthole-loaded N-octyl-O-sulfonyl chitosan micelles,NSC-OST)对去卵巢骨质疏松大鼠骨微结构和骨吸收的影响,初步探讨其抗骨质疏松的分子机制。方法将40只雌性SD大鼠按照随机原则分为5组:假手术组(Sham)、模型组(Ovx)、尼尔雌醇组(Nil)、蛇床子素(OST)、蛇床子素/壳聚糖衍生物胶束组(NSC-OST),除了假手术组以外均通过摘除双侧卵巢形成骨质疏松模型,连续给药12周后,通过HE染色和Micro-CT检测分别从二维、三维形态学角度观察药物对骨微结构的影响;通过抗酒石酸酸性磷酸酶染色观察药物对体内破骨细胞生成和分化的影响;通过免疫组化手段检测药物对破骨特异分子NFATc1、c-fos、CTSK表达的影响。结果 HE染色结果显示药物组均能明显改善造模引起的组织骨质疏松样改变,其中Nil组改善骨微结构的效果最明显,其次为NSC-OST组,最后是OST组;通过Micro-CT分析发现NSC-OST可显著提高大鼠股骨的BMD和BV/TV(P0.05),并明显改善Tb.N、Tb.Sp、Tb.Th三项指标(P0.05),效果要优于OST组,但略逊于Nil组; TRAP染色提示NSC-OST可以明显抑制N.Oc/BS和Oc.S/BS两项破骨生成参数(P0.05),效果要优于OST组,但略逊于Nil组;免疫组化实验提示:NSC-OST可以抑制大鼠骨组织中的破骨特异分子NFATc1、c-fos、CTSK的表达,前两项指标NSC-OST与Nil抑制作用相当,抑制CTSK时NSC-OST的作用要弱于Nil,均强于OST。结论 NSC-OST可以显著改善去卵巢大鼠的骨微结构,其抗骨质疏松作用的发挥可能与其抑制破骨细胞的生成和分化相关。