姜黄素固体脂质纳米粒制备及体外释放的研究

[目的]以单硬脂酸甘油酯为载体材料制备姜黄素固体脂质纳米粒及其体外释放行为的研究。[方法]采用乳化蒸发-低温固化法制备姜黄素固体脂质纳米粒,高速离心法测其包封率,激光粒径仪测定其粒径、电位,用差示扫描量热仪(DSC)表征其性质,采用透析法考察固体脂质纳米粒中姜黄素的体外释放行为。[结果]姜黄素固体脂质纳米粒的平均粒径为(89.24±2.06)nm,Zeta电位为(-18.77±1.27)m V,药物平均包封率为(89.55±1.84)%,DSC结果表明其理化性质稳定可靠,体外12 h累计释放率为(43.12±1.02)%。[结论]制备的姜黄素固体脂质纳米粒粒径小且分布均匀,具有良好的缓释作用。     

高压乳匀法制备中药固体脂质纳米粒

目的采用高压乳匀法将中药有效成分包载于固体脂质纳米粒(SLN),并研究制备的纳米粒的主要性质。方法选择水飞蓟宾(SIL)和汉防己甲素(TET)为模型药物,采用高压乳匀法将其分别包载于SLN。在电镜下观察其形态,以粒度分析仪和Zeta电位分析仪测定其粒径和Zeta电位,用葡聚糖凝胶柱层析法和HPLC测定其包封率和载药量,还观察了SLN的稳定性。结果高压乳匀法制备的SIL-SLN呈球状,形态规则,平均粒径为(157±8)nm,Zeta电位为(-35.36±2.68)mV,包封率为95.64%,载药量为4.63%;TET-SLN呈片状存在,不规则,粒径较小,平均粒径为(47±3)nm,Zeta电位为(-32.99±2.54)mV,包封率为97.82%,载药量为4.76%。SIL-SLN和TET-SLN有较高稳定性。结论高压乳匀法适于制备包载中药的SLN。     

胰岛素多肽固体脂质纳米粒的制备与理化性质研究

目的该课题选用水溶性多肽类药物,以生物相容性好的脂质为主体材料,制备固体脂质纳米粒。方法采用溶剂扩散法制备单硬脂酸甘油脂纳米粒,以胰岛素(ISULIN)为模型药物。研究纳米粒的理化性质,以微粒粒度与zeta电位测定仪测定其粒径分布、表面电位;高效液相法测定了药物包封率;考察载药纳米粒的体外释放特性;以4种不同比例的硬脂酸、油酸和单硬脂酸甘油脂,通过溶剂扩散法制备混合脂质纳米粒,考察混合脂质纳米粒的理化性质、包封率和体外释放特性。结果用水性溶剂扩散法可简便快速制备得到单硬脂酸甘油酷固体脂质纳米粒,纳米粒粒径呈单峰分布,体均粒径(435.3±121.6)nm,表面电位-(20.7±1.6)mV。采用HPLC测定,药物的包封率68.2%。体外释放研究结果显示,INSULIN-SLN在前8h快速释放了纳米粒所载药物的28.4%,随后每天以3.7%的速率持续释放。结论采用单硬脂酸甘油醋、硬脂酸、油酸混合脂质处方,并不显著影响纳米粒的粒径、表面电位和药物的包封率。油酸的加入,可在一定程度上增加药物的释放。     

甘草酸固体脂质纳米粒的处方及制备工艺

目的 制备甘草酸固体脂质纳米粒(GL-SLN).方法 用旋转蒸发薄膜超声法制备GL-SLN,在单因素考察的基础上,通过正交设计优选该纳米粒的处方及制备工艺,并对优化条件下制备的GL-SLN进行质量评价.结果 制备的GL-SLN大小较均匀,平均粒径为75.8 nm,zeta电位-19.7 mV,载药量8.27%,包封率91.76%.结论 薄膜超声分散法优化工艺制备得到的GL-SLN包封率较高,稳定性好,方法可靠.     

麦角甾苷眼用固体脂质纳米粒制备及其体外释药的研究

[目的] 研究麦角甾苷眼用固体脂质纳米粒的制备方法及其体外释放的情况。[方法] 采用乳化蒸发-低温固化法制备麦角甾苷固体脂质纳米粒,超滤离心法测其包封率,并对其粒径、电位、进行进一步考察,用差示扫描量热仪(DSC)表征其性质,采用透析法考察固体脂质纳米粒中麦角甾苷的体外释放行为。[结果] 麦角甾苷固体脂质纳米粒的平均粒径为85.56 nm,Zeta 电位约为-20.97 mV,药物平均包封率为88.31 %,DSC 表明其理化性质稳定可靠,体外12 h 累计释放率62.46 %。[结论] 制备的麦角甾苷固体脂质纳米粒包封率较高,粒径小且分布均匀,有良好的缓释作用。     

固体脂质纳米粒的研究进展

固体脂质纳米粒（solid lipid nanoparticles,SLN）是由天然存在或人工合成的固态类脂为载体,将药物镶嵌于类脂核或和黏附于类脂表面制备而成的固体胶粒给药系统,粒径在10~1 000 nm 之间。固体脂质纳米粒所用的载体均为无毒或低毒性、生物相容性好、生物可降解的类脂,是20 世纪90 年代初发展起来的新一代亚微粒给药系统。固体脂质纳米粒具有控制药物释放、避免药物的降解或泄漏以及良好的靶向性等优点。该文对固体脂质纳米粒基本组成成分、制备方法、影响载药量（drug loading,DL）和包封率（entrapment efficiency,EE）的因素、载药系统的释放以及固体脂质纳米粒的应用、优势等方面进行综述。     

药脂比对米非司酮固体脂质纳米粒性能的影响

目的:将堕胎药物米非司酮载入固体脂质纳米粒(SLNs)中,研究药脂比对该体系性能的影响.方法:选用相同用量的4种表面活性剂,对SLN体系的平均粒径、Zeta电和包封率进行了测定,同时采用差示扫描量热法检测药物在载体中存在的晶型形态.结果:当脂质质量不变,SLN系统的平均粒径随所载药物量增加而增加.在载药量为50 mg,脂质质量为1 g时,包封率最高.同时,Zeta电位与胶体系统中游离药物量相关.DSC分析发现所有载药SLN试样均未出现米非司酮约190 ℃熔点附近的吸热峰.结论:载体所载模型药会影响系统的平均粒径和Zeta电位,即使在250 mg/1 g(脂质)的高载药量下,原本结晶性药物也是以无定形或者分子状态分散在SLN载体系统中的,目前尚未见到在如此高载药量下载体物理性状的相关报道.模型药米非司酮可以影响纳米系统的性能,另一方面,所加入药物的性能也被纳米尺度载体系统改变了.     

丹参酮ⅡA长循环固体脂质纳米粒的制备及其理化性质研究

制备丹参酮ⅡA长循环固体脂质纳米粒（TA-LSLN）并考察其理化性质。方法：以乳化，溶剂挥发法制备丹参酮ⅡA固体脂质纳米粒，测定其粒径、Zeta电位和药物包封率，以透射电镜观察纳米粒形态，考察了纳米粒的稳定性，并进行TA-LSLN的体外释放试验。结果：纳米粒平均粒径为107．6nm，Zeta电位为-34．5mV，包封率为82．3％。4℃放置1个月粒径和包封率无变化。体外释药试验表明TA-LSLN开始阶段释放较快，10h时释放了41％，之后缓慢释放；体外释药结果符合Weibull方程。结论：制备的TA-LSLN平均粒径和包封率较为理想，能使药物缓慢释放。     

黄豆苷元固体脂质纳米粒的制备及其性质考察

目的 制备黄豆苷元固体脂质纳米粒并考察其性质。方法 采用正交实验法优化黄豆苷元固体脂质纳米粒的最佳处方,并测定黄豆苷元固体脂质纳米粒的粒径、ζ电位、包封率、稳定性和累积释放百分率。结果 黄豆苷元固体脂质纳米粒的最佳处方组合为：单硬脂酸甘油酯用量为2.0%,黄豆苷元用量为2.0 mg·mL^-1,豆磷脂的用量为0.4%, Pluronic F68的用量为1.2 %。所制得的纳米粒包封率为84.7%、平均粒径为170 nm、ζ电位为-35.8 mV、72 h累积释放百分率为90.3%。结论 新制黄豆苷元固体脂质纳米粒的粒度分布范围窄,包封率较高,稳定性良好。     

鬼臼毒素硬脂酸固体脂质纳米粒的制备

目的为提高鬼臼毒素(PPT)制剂的疗效,降低毒副作用,以硬脂酸为载体材料制备PPT固体脂质纳米粒。方法采用改良的微乳技术制备PPT固体脂质纳米粒;用透射电镜考察了纳米粒的形态;用高效液相色谱法测定PPT固体脂质纳米粒的包封率。结果PPT固体脂质纳米粒基本呈圆球状或椭圆球状,粒径为(56.5±25.8)nm,包封率85.6%。结论PPT固体脂质纳米粒包封率高,粒径分布较均匀,具有较好的稳定性,是有希望的表皮靶向制剂。     

Acupuncture Treatment of Vomiting

CASE HISTORY A female patient, 46 years old, head of the foreign affairs department of a certain university in Beijing, paid her first visit on October 9, 2006, with the chief complaint of vomiting for one month. She got vomiting after meals in early September. Before that, she had discomfortable sensation in the stomach due to angry with others, but she didn't pay much attention. Later, it developed into vomiting after eating. After the vomiting, the discomfort would be relieved, but with slight hypodynamia. She was once diagnosed as having 'neurogenic vomiting'. Having taken some western and Chinese drugs, the above symptoms were a little bit improved, but she would have nausea upon eating and with regurgitation. Because of the fear for vomiting, she did not dare to have food intake, with body weight reduction of 6 kilos in one month.     

Qiu Baoguo''''s Experience in Treating Consumptive Syndromes after Radio-Chemotherapies

Radiotherapy and chemotherapy are the important modern medical therapies for malignant tumors,yet they can also bring about serious local and systemic toxic side reactions so to decrease the patient;'s life quality,manifested by a series of consumptive symptoms.Having engaged in the combined work of Chinese and western medicine for nearly 50 years,the research fellow Qiu Baoguo in Henan Provincial Academy of TCM has developed his unique views on the TCM study of consumptive syndromes.The author of this essay had once the fortune tO follow Dr.Qiu in clinic,and specially would like to introduce in the following Dr.Qiu's experience in treating consumptive syndromes after radio-chemotherapies for patients with malignant tumor.     

Insomnia Due to Deficiency of Both the Heart and Spleen Treated by Acupuncture-Moxibustion and Chinese Tuina

OBJECTIVE: To observe therapeutic effects of the comprehensive therapy of acupuncture-moxibustion and Chinese Tuina for treatment of insomnia due to deficiency of both the heart and spleen. METHODS: 92 cases were divided randomly into the treatment group (treated by acupuncture-moxibustion and Chinese Tuina) and the control group (treated by acupuncture-moxibustion). RESULTS: The therapeutic effect of the treatment group was obviously superior to that of the control group (the CHI2 test showed P < 0.01). CONCLUSIONS: The comprehensive therapy of acupuncture-moxibustion and Chinese Tuina can give marked therapeutic effects for treatment of insomnia due to deficiency of both the heart and spleen.     

Analysis of CK-19,PDX-1,Nestin,Ngn3 in different donor islet purity in rats

Objective: To investigate if there are the CK-19, PDX-1, Nestin, Ngn3 positive cells in the donor islets of different purity in rats. Methods: Thirty male adult SD rats were randomly divided into 3 groups. Islets were isolated using digestion by ductal injection of collagenase. Group Ⅰ (n=10): Separating cell preparations were not purified, Group Ⅱ(n=10): Islet sediment was purified with 25% Ficoll400 ,Group Ⅲ (n=10): Islet sediment was purified with 25% and 11% Ficoll-400. The levels of protein of CK-19, PDX-1, Nestin and Ngn3 were detected by immunohistochemistry and the mRNA of CK-19, PDX-1, Nestin, Ngn3 was amplified by RT-PCR. Results: After two different purification methods applied, three islet preparations of different purities were obtained. The difference of islet purity was significant among various groups (P＜0.05). Compared with group Ⅱ and group Ⅲ,the protein and mRNA of CK-19, PDX-1, Nestin,Ngn3 were both higher in group Ⅰ; group Ⅲ was poorly expressed. Conclusions: The three different islet purity donor islet have different CK-19, PDX-1, Nestin, Ngn3 positive cells within them, indicating that there are some islet stem cells in the purified donor islet.     

A preliminary screening study on the associated proteins in human psoriasis vulgaris by serum proteomics technologies

Objective：To investigate the optimum screening conditions of associated proteins in human psoriasis vulgaris by serum proteomics technique, and to screen the different expression proteins related with psoriasis vulgaris. Methods：Serum samples of peripheral blood were collected from newly diagnosed psoriasis vulgaris patients in the clinic, and 20 matched healthy persons. Serum albumin IgG was removed by filtering with ProteoExtract Albumin/IgG. After comparative proteomics analysis the different protein spots were identified using 2-DE and MS. Results ：Electrophoresis figures with high resolution and reproducibility were obtained. Three different expression proteins were found only in the serum from psoriasis vulgaris patients, while nine other different proteins expressing from healthy volunteers. Conclusion：The protein expression was different in the serum between the psoriasis vulgaris patients and healthy volunteers. It was hoped that we could find the biomarkers related to psoriasis vulgaris by using proteomics.     

A CASE OF HUGE GASTRIC DISOPYROBEZOAR

PYTOBEZOARS are common bezoars in gastrontestinal tract, commonly seen in stomach and mall intestine,1but huge disopyrobezoars are     

Acupuncture Treatment of Chest Bi Syndrome

CASE HISTORY A male,a retired officer of 61 years old,paid his first visit on May 12,2006.The patient stated that 2 weeks before he suddenly got paroxysmal precordial choking pain,with irregular attacks.Each attack would last several seconds to several minutes.The attack was accompanied with heavy oppressed sensation in the precordial region,palpitation,lassitude,and in severe cases,sweating,which was once diagnosed by a hospital as'coronary heart disease'.Recalling the case history,the patient said that several days before he got angry with others because of some affairs in work,and he was not so used to the life pattern since he had just retired from his busy working post.At usual times,he was quick tempered and peevish.In recent days,he had poor appetite,and loose stool.     

Instructions to Contributors

The English edition of Chinese Journal of Integrative Medicine is edited and published by the Chinese Journal of Integrated Traditional and Western Medicine Press.Original scientific papers of advanced clinical and experimental medicine in the field of complementary/alternative medicine or integrative medicine are expected.