分子伴侣HSP40/DNAJ蛋白家族及其在神经退行性疾病中的作用

分子伴侣和辅助伴侣分子能够促进新合成多肽的组装以及帮助未折叠或错误折叠的蛋白质重新折叠形成正确折叠的蛋白质，从而维持细胞内蛋白系统的稳态。作为热休克蛋白（HSP）70的辅助伴侣分子，HSP40（DNAJ）蛋白家族是目前已知的最大分子伴侣家族，能够通过J结构域与HSP70结合，从而帮助蛋白质折叠。近年研究发现，DNAJ家族蛋白与阿尔茨海默病、帕金森病、亨廷顿病、脊髓小脑性共济失调、进行性神经性腓骨肌萎缩症、脊髓性肌萎缩、远端型遗传性运动神经病变、肢带型肌营养不良、神经元蜡样质脂褐质沉积症和特发性震颤等神经退行性疾病的发生和发展有密切关系，如DNAJA1可有效降解亨廷顿蛋白聚集体；DNAJB1可降解蛋白聚集体ataxin-3；DNAJB2能够抑制亨廷顿蛋白聚集体的形成；DNAJB6能够抑制Aβ₄₂和α-突触核蛋白的聚集；DNAJC5可以促进TDP-43、τ蛋白和α-突触核蛋白释放到细胞外空间；与特发性震颤相关的DNAJC13的突变可能阻碍核内体蛋白运输。本文就DNAJ蛋白家族在神经退行性疾病中的作用机制进行综述。     

热休克蛋白70在神经元可塑性中作用的研究进展

热休克蛋白(heat shock protein,HSP)是体内一族重要的蛋白质,不仅具有帮助蛋白质正确组装、折叠、转运的作用,也参与抑制凋亡,并与抗原提呈、甾体激素受体功能、细胞内运输、核受体结合有关。热休克蛋白包括小分子HSP家族、HSP60家族、HSP70家族、HSP90家族和HSP110家族,其中H     

热休克蛋白70与脑缺血

随着分子生物学研究手段的应用 ,人们已逐渐认识到在脑中存在着完善的适应机制 ,通过迅速诱导基因表达和蛋白质合成来阻止导致脑细胞死亡的病理生理变化。众多的研究表明脑缺血可诱导许多基因的表达 ,其中大多数参与脑的自我修复 [1 ]。热休克蛋白 (HSP)是机体在遭受各种应激刺激后诱导产生的一种应激蛋白 ,对细胞具有保护作用 ,与缺血型脑损伤等多种神经系统疾患关系密切。其中热休克蛋白 70(heat shock protein70 ,HSP70 )作为脑缺血所诱导的一种神经元保护性物质可阻止蛋白质在压力下发生聚集或错误折叠而日益受到医学界的广泛关注 ,…     

热休克蛋白70在神经元可塑性中作用的研究进展

热休克蛋白(heat shock protein,HSP)是体内一族重要的蛋白质,不仅具有帮助蛋白质正确组装、折叠、转运的作用,也参与抑制凋亡,并与抗原提呈、甾体激素受体功能、细胞内运输、核受体结合有关.热休克蛋白包括小分子HSP家族、HSP60家族、HSP70家族、HSP90家族和HSP110家族,其中HSP70家族包括HSC70、HSP72、Grp75、Grp78、HO-1.应激状态下,变性的蛋白质在胞浆中通过使已经和热休克因子(heat shock factor,HSF)结合的HSP解离下来,使HSF磷酸化,三聚体化,从而诱导HSP表达.     

热休克蛋白70及其抑制剂的研究进展

热休克蛋白70(heat shock protein 70,Hsp70)是一种在应激条件下诱导表达的伴侣蛋白,能帮助细胞内新生蛋白折叠,蛋白细胞内运输、蛋自装配和降解,并能在应激状态下维持蛋白质构象.研究表明,Hsp70与许多疾病有关,如癌症、神经退行性疾病、异源移植的排斥、感染等,有望成为新的药物作用靶点.本文综述了...     

急、慢性运动与骨骼肌热休克蛋白的表达

热休克蛋白(Heat shock protein，HSP)是应激后细胞内优先合成的一组蛋白质，又称为应激蛋白(Stress protein，SP)或分子伴侣(Chaperones)。它具有重要的细胞功能，其在体内控制蛋白质的折叠，调节蛋白质的成熟和跨膜转位，调节变性蛋白质的降解及亚基装配等细胞过程。本文对HSP70与运动的关系做一综述。     

磷酸化HSP27在恶性肿瘤中的研究进展

热休克蛋白(heat shock proteins,HSPs)是一类在热休克或其他应激状态下产生的序列高度保守的蛋白质。热休克蛋白27 (heat shock protein 27, HSP27)是该蛋白质家族中研究最为深入的成员之一,它作为不依赖ATP的分子伴侣在蛋白质的折叠中扮演着重要角色,同时也参与了包括癌症在内的多种疾病的病理过程。已有大量文献证明蛋白质的磷酸化与肿瘤的发生发展密切相关,HSP27的磷酸化在肿瘤发生发展中的作用是目前的研究热点之一,综述了磷酸化HSP27与恶性肿瘤发生发展的关系及其作为肿瘤治疗靶点的可能,期待为恶性肿瘤的防治提供新的诊治思路。     

热休克蛋白90在胃癌研究中的进展

胃癌(GC)是我国最常见的消化道肿瘤。热休克蛋白90(HSP90)被称为分子伴侣,其在合成多肽、控制蛋白质数量、蛋白折叠、活性和降解过程中发挥重要作用。HSP90在胃癌组织中高表达,并通过调节癌细胞生长、粘附、侵袭、转移、血管生成和细胞凋亡等,在胃癌发展过程中起重要作用。近年来HSP90 抑制剂成为重要的胃癌分子治疗靶点,但在抗肿瘤方面和临床应用上有待深入研究。本文就HSP90在胃癌发生发展中的作用机制与表达意义,及HSP90抑制剂在胃癌中的研究作一综述。     

内质网应激与乙型肝炎关系的研究进展

未折叠蛋白或者错误折叠蛋白在内质网内的大量聚集,影响内质网的稳态和正常功能,引发未折叠蛋白反应,称为内质网应激。许多研究表明,乙型肝炎患者肝细胞中都存在内质网应激。本文将以内质网应激作为切入点,阐明内质网应激的作用功能及其与乙型肝炎之间的关系。     

衰老、慢性应激与免疫细胞热休克蛋白70反应抑制

自然衰老和慢性应激都能导致免疫细胞对环境刺激的抵抗力降低。衰老和慢性应激影响免疫细胞功能的分子机制目前还不清楚。热休克蛋白(HSP)是一类在所有原核细胞和真核细胞中均有表达的高度保守的蛋白质。研究表明,HSP反应是细胞维持正常功能,对抗应激性损伤的基本保护性机制之一。在HSP家族中,热休克蛋白70(HSP70)对应激条件最敏感,且被认为是功能最重要的一类热休克蛋白[1]。本文综述衰老和慢性应激对免疫细胞HSP70表达的抑制作用及其调节机制。一、热休克蛋白70的细胞保护作用研究证实,HSP70通过“分子伴侣”作用广泛参与细胞周期…     

APPLICATION OF LORNOXICAM TO PATIENT-CONTROLLED ANALGESIA IN PATIENTS UNDERGOING ABDOMINAL SURGERIES

FOR anesthesiologis s ,treatingpostoperativepainhas alwaysbeen a problem.Althoughopioidshave been provedtobe effective,theirsideeffectscouldnotbeignored.With thedevelopmentofscienceand pharmacology,many drugs with aspectsof satisfactoryanalgesicefficacyand couldbe welltoleratedby patientshave been developed.And lornoxicamisone of them, which isa non-steroidalanti-inflammatorydrug (NSAID ), with analgesic, anti-infl-ammatory,andantipyreticproperties.Itseliminationhalf-time(3 to 5 hours) isle…     

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.     

Dr.Zhang Ren''''s Experience in the Acupuncture Treatment of Different Diseases with the Same Therapeutic Principle

Dr.Zhang Ren,the chief physician,is the chairman of Shanghai Acupuncture and Moxibustion Association.Having been engaged in medicine for about 40 years,he is experienced in treating various intractable diseases.In his long years of clinical practice,he advocates taking the TCM differentiation as the basis to seek for the acupuncture method for treatment of modern intractable diseases.The author of this essay had the fortune to follow Dr.Zhang in study.The following is a summary of Dr.Zhang's experience in the acupuncture treatment for different intractable diseases with the same therapeutic principle.     

Luo Lingjie''''s Experience in Treating Chronic Nephropathy

In treating chronic nephropathy,Luo Lingjie,a chief physician,pays attention to regulating the balance between yin and yang,treating infection if present,and removing pathogenic factors.He prescribes gentle drugs and uses carefully strongly warming-tonifying ones,emphasizes the importance of persuading the patient to persist in treatment with medication and nurse one's health for recuperation,and is good at combined use of TCM and western medicine therapy and brings the merits of various therapies into full play,with obvious theraoeutic effects.     

Acupuncture Combined with Spinal Tui Na for Treatment of Primary Dysmenorrhea in 30 Cases

Objective: To observe the therapeutic effects in acupunture treatment of primary dysmenorrhea combined with spinal Tui Na, and study its mechanism. Methods: Thirty cases of the treatment group were treated by acupuncture combined with spinal Tui Na, and thirty cases in the control group were treated by routine acupuncture. Results: The total effective rate was 93.3% in the treatment group, and 73.3% in the control group, with a significant difference between the two groups (P<0.05). Conclusions: Acupuncture combined with spinal Tui Na has good prospects for treatment of primary dysmenorrhea.