HPLC法测定雷奈酸锶干混悬剂的含量

目的建立雷奈酸锶干混悬剂含量的高效液相色谱测定方法 .方法采用Angilent Zorbax C18(4.6mm×250mm,5μm)色谱柱,流动相为0.2%(v/v)磷酸溶液-甲醇(85∶15)用三乙胺调节pH5.0,流速为1.0mL·min-1,检测波长234nm.结果在该色谱条件下,雷奈酸锶在4.96~248.00μg·mL-1浓度范围内线性关系良好,重复性试验RSD为0.71%,平均回收率为99.15%(RSD=0.57%).结论本法灵敏、准确、重复性好,可用于雷奈酸锶干混悬剂的质量控制.     

锶矿泉水联合格列美脲对2型糖尿病大鼠血脂的影响

目的探讨格列美脲联合饮用锶矿泉水对2型糖尿病大鼠血糖血脂的影响及肝脏的保护作用。方法以链脲佐菌素诱导2型糖尿病大鼠模型,同时设空白对照组、模型组、高锶矿泉水组、自来水&格列美脲组、高锶&格列美脲组。实验期间每周监测大鼠空腹血糖,每2周分别从各组随机抽取6只大鼠,腹主动脉取血检测总胆固醇(TC)和甘油三酯(TG),取肝脏组织做病理切片观察。结果 2型糖尿病模型组空腹血糖升高,TC、TG含量显著增加,格列美脲治疗组血糖下降,总胆固醇、甘油三酯含量降低;单纯饮用锶矿泉水组血糖无明显下降,TC、TG含量降低;而格列美脲联合饮用锶矿泉水组显示降糖、降脂效果更加显著。实验各组的肝细胞与空白对照组相比,均有不同程度的病理改变,而格列美脲联合饮用锶矿泉水组肝细胞形态结构基本恢复至正常水平。结论 2型糖尿病大鼠饮用锶矿泉水可降低TC和TG,且联合格列美脲治疗者效果更佳,可能对延缓2型糖尿病的进程及预防脂肪肝的形成有一定作用。     

Strontium ranelate,a promising disease modifying osteoarthritis drug

Introduction: The articular cartilage and subchondral bone may have potential crosstalk in the development and progression of osteoarthritis (OA). Strontium ranelate (SrR) has the ability to dissociate the bone remodeling process and to change the balance between bone resorption and bone formation. Its effect on subchondral bone makes it a potential disease- modifying osteoarthritis drug (DMOAD) in the treatment of OA. The aim of the current review is to summarize up-to-date pharmacological and clinical data of SrR for OA treatment.

Areas covered: A literature search was performed on PubMed and European Medicines Agency (EMA) website for all publications and documents related to SrR and OA. References of related studies were searched by hand. Treatment with SrR, especially at the dosage of 2 g/day, was associated with reduced radiographic knee OA progression, and with meaningful clinical improvement. It was also significantly associated with decreased MRI-assessed cartilage volume loss (CVL) and bone marrow lesions (BMLs).

Expert opinion: SrR could be a promising DMOAD particularly for OA patients with bone phenotypes. The clinical efficacy and side effects of SrR for OA treatment need to be further investigated in future clinical trials before clinical application.     

雷奈酸锶:翻开了治疗骨质疏松的新篇章

雷奈酸锶是一个新型抗骨质疏松制剂,它和以前所用治疗骨质疏松的药物不同,其对骨代谢具有双重作用,即抑制骨吸收和促进骨的形成.尽管其机制尚不清楚,但在组织和细胞培养中,雷奈酸锶可以促进前成骨细胞的增生和分化,促进骨基质的合成.同时雷奈酸锶还可以抑制破骨细胞分化和破骨细胞活性并刺激破骨细胞凋亡.在体内,雷奈酸锶可使正常的大鼠和小鼠骨形成增强和骨吸收降低,并可改善骨的微细结构.在卵巢切除大鼠,雷奈酸锶在保持高水平骨形成的同时抑制骨吸收,增加骨量和骨的强度.在临床实验中,雷奈酸锶不仅可以增加血清碱性磷酸酶(骨的形成指标)的水平,并可降低血清C-交联端肽I型胶原(骨的吸收指标)的水平.组织测量学研究显示,雷奈酸锶可以使成骨细胞的表面和骨的矿物质沉积率增加,而骨吸收的参数下降.雷奈酸锶可降低椎骨以及非椎骨新发骨折的危险性.这些前临床和临床实验结果 显示雷奈酸锶是安全、有效的抗骨质疏松药物,其刺激骨形成和抑制骨吸收的双重作用使其有可能成为抗骨质疏松的理想药物.     

含锶/锌钙磷涂层对RAW264.7破骨细胞体外影响的研究

目的:研究锶或锌加入电化学沉积钙磷涂层后对类破骨细胞增殖和分化的影响。方法:以电化学沉积钙磷涂层为对照组,与加入锶或锌的电化学沉积钙磷涂层相比较。3种涂层分别接种RAW264.7细胞培养8 d,采用细胞计数试剂盒 (cell counting kit-8,CCK-8)检测细胞培养6 d后的增殖情况,同时检测细胞培养8 d后的抗酒石酸酸性磷酸酶 (tartrate resistant acid phosphatase,TRAP)活性。结果:3种涂层接种RAW264.7细胞后,使用CCK-8试剂盒检测,结果显示第4小时时加入锌的钙磷涂层其吸光度值明显高于其他两组,但第2天时的细胞增殖指数低于其他两组(P<0.05)。第14天的TRAP酶活性检测结果显示3组间比较差异无统计学意义。结论:含锌电化学沉积钙磷涂层促进破骨细胞的粘附,但加入锶或锌对类破骨细胞在电化学沉积钙磷涂层表面的增殖和分化无影响。     

89SrCl联合依班膦酸钠治疗多发性骨转移癌疼痛

目的 观察89SrCl2联合依班膦酸钠治疗多发性骨转移癌疼痛与单独应用依班膦酸钠或89SrCl2治疗的临床疗效。方法84例骨转移癌疼痛患者,分为3个治疗组,其中30例采用89SrCl,联合依班膦酸钠方法,26例采用单纯89SrCl2治疗,28例采用依班膦酸钠治疗。用SPSS13．0统计软件,疗效比较采用行×列表资料的r检验。结果联合治疗组骨痛缓解总有效率为96．6％（29／30）,依班膦酸钠组及89SrCl2治疗组总有效率分别为71．4％（20／28）和73．1％（19／26）。联合用药组与单独用药组治疗后骨痛缓解有效率（X2=7．497）,全身状况Kamofsky评分提高率[80．0％（24／30）与50．0％（14／28）,53．8％（14／26）,X2=35．476]和病灶治疗有效率[47．6％（50／105）与11．2％（11／98）,22．2％（20／90）,X2=6．564]间比较差异有统计学意义（P均〈0．05）。结论89SrCl2联合依班膦酸钠是治疗骨转移性癌疼痛较为有效和可行的方法。联合用药临床疗效优于单独用药。     

海阳核电站周围居民饮用水中锶-90放射性水平调查与卫生学评价

目的 调查海阳核电站周围居民饮用水中锶-90的活度浓度,分析枯水期和丰水期的放射性水平的变化规律,评价周围居民由饮水所致待积有效剂量。方法 海阳核电站周围30 km内,选择10个采样点,每年按丰水期及枯水期分别采集样品2次,两年共8次,共计样品87个。样品预处理和制备采用国家标准(GB 12375-90)方法,使用FJ2603G低本底β测量仪测量。结果 饮用水中锶-90活度浓度均值为(4.96±1.6)mBq·L^-1,范围为1.21~9.12mBq·L^-1。经配对t检验,发现海阳核电站周围饮用水中锶-90在枯水期与丰水期放射性水平差异无统计学意义(P> 0.05)。各类水体锶-90活度浓度从大到小,枯水期依次为自来水 > 水井水 > 地表水,而丰水期依次为水井水 > 自来水 > 地表水。其所致居民待积有效剂量顺序为水井水 > 自来水 > 地表水,分别为0.104、0.103、0.095 μSv·a^-1。结论 海洋核电站周围居民饮用水中锶-90活度浓度处于本底水平;周围居民饮水所致待积有效剂量远低于《电离辐射防护与辐射防护安全基本标准》(GB 18871-2002)所规定的限值(1 mSv),因此居民所受剂量为本底水平。     

Successful delivery following intracytoplasmic sperm injection with calcium ionophore A23187 oocyte activation in a partially globozoospermic patient

Purpose

To describe a successful pregnancy outcome following intracytoplasmic sperm injection (ICSI) with assisted oocyte activation (AOA) in a case of partial globozoospermia.

Methods

AOA was accomplished with calcium ionophore A23187. Sperm morphology was observed via light, fluorescent and electron microscopy following a Diff-Quik stain and fluorescein isothiocyanate-labeled peanut agglutinin (FITC-PNA) staining. An activation ability test was employed using a mouse oocyte exposed to strontium chloride.

Results

Via light microscopy, it was found that a large number of sperm possessed deficient acrosomes and a sharply rounded head; however, we observed both normal and the aforementioned abnormal sperm via FITC-PNA staining of a semen specimen. Mouse oocyte activation was 87.5?% via natural activation without AOA. With AOA after ICSI, 100?% oocyte activation was observed. Five oocytes were retrieved, and AOA with A23187 after ICSI resulted in a high fertilization rate (4 of 5, 80?%). Two embryos developed and the patient subsequently delivered a healthy female infant without any congenital abnormalities.

Conclusions

We report a successful pregnancy outcome using an early stage embryo, which developed following ICSI using sperm from a partially globozoospermic patient who possessed temporary potential oocyte activation.     

雷奈酸锶对大鼠骨髓间充质干细胞成软骨分化的影响

目的:探讨雷奈酸锶(strontium ranelate,SrR)对大鼠骨髓间充质干细胞(bone mesenchymal stem cells,BMSCs)增殖及成软骨分化的作用.方法:体外分离培养大鼠BMSCs,以含0.25～2.0 mmol/L的SrR软骨诱导分化培养基培养,CCK-8法检测细胞增殖状态,甲苯胺蓝...