脓毒症早期BMP-2和BMP-4的变化

目的 探讨骨形态发生蛋白-2(BMP-2)和骨形态发生蛋白-4(BMP-4)在脓毒症发病中的变化规律及作用机制.方法 收集入住重症医学科(ICU)24 h内的脓毒症患者(脓毒症组)、非脓毒症患者(非脓毒症组)和健康志愿者(对照组)的血清,ELISA测定血清BMP-2和BMP-4浓度.免疫印迹法检测经脂多糖(LPS)处理...     

前列腺癌骨转移灶中BMP-2、BMP-4、BMP-7的表达及临床意义

目的检测BMP-2、BMP-4、BMP-7在前列腺癌骨转移灶中的表达,探讨其在前列腺癌成骨性转移中的作用。方法采用免疫组化EnVision法检测28例前列腺癌骨转移病例及17例良性前列腺增生(benign prostate hyperplasia,BPH)病例中BMP-2、BMP-4、BMP-7的表达并对其进行对比分析。结果 BMP-2在所有前列腺癌骨转移灶及BPH病例中均表达,二者中其阳性率及表达强度无明显差异(P>0.05)。BMP-4在前列腺癌骨转移灶及BPH中的阳性率无明显差异(P>0.05),但在前者中BMP-4的表达强度明显高于后者(P<0.05)。BMP-7在前列腺癌骨转移灶中的阳性率及表达强度均明显高于BPH(P<0.05)。在BPH的阳性表达病例中,BMP-2、BMP-4、BMP-7细胞质与细胞核同时阳性的表达率分别为13.3%、7.1%和11.1%,在前列腺癌骨转移灶的阳性表达病例中,BMP-2、BMP-4、BMP-7细胞质与细胞核的同时阳性的表达率均为100%,且细胞核的表达强度明显高于细胞质。结论 BMP-4、BMP-7在前列腺癌骨转移灶中高表达,提示其在前列腺癌的成骨性转移中可能起重要作用。     

BMP-2和BMP-4基因结构及调控的研究进展

BMP-4基因组包括5个外显子,不同组织来源的BMP-4 cDNA采用不同的启动子,BMP-4基因上有COUP-TF1的调节作用位点。BMP-2基因组有2个外显子,不同组织来源的BMP-2 cDNA亦采用不同的启动子,BMP-2基因上有p53的作用位点。     

The effect of BMP-2 on the osteoconductive properties of β-tricalcium phosphate in rat calvaria defects

Bone formation in critical-sized calvaria defects is strongly dependent on the osteoconductive properties of grafts. It remains a matter of controversy whether biomaterials can replace autografts and whether the supplementation of biomaterials with Bone Morphogenetic Proteins (BMPs) is necessary to enhance bone formation. We examined rat calvaria critical-sized defects (5-mm-diameter) treated with β-tricalcium phosphate (TCP; Cerasorb? M), polylactic and polyglycolic acid gel (PLA/PGA; Fisiograft?) and calcium phosphate cement (CPC; Norian? CRS?), either alone or in the presence of 5 μg of BMP-2 after 45 days. Autografts and untreated defects served as controls. Bone formation was evaluated based on μCT analysis, histomorphometric analysis and fluorescence analysis. We report that TCP supported bone formation more efficiently than did autografts. Bone formation in the presence of TCP alone reached a maximal level, as BMP-2 supplementation failed to enhance bone formation. By contrast, no significant difference in bone formation was observed when PLA/PGA and CPC were compared to autografts. Moreover, the presence of BMP-2 did not substantially change the osteoconductive properties of PLA/PGA or CPC. We conclude that the osteoconductive properties of TCP are superior to those of autografts and that TCP does not require BMP-2 supplementation. Our findings also show that the decreased osteoconductive properties of PLA/PGA and CPC cannot be overcome by BMP-2 supplementation in rat calvaria defects.     

The Effects of One-Step Self-Etch Adhesives on the Induction of Oxidative Stress and Production of TGF-β1 and BMP-2 by Human Gingival Fibroblasts

The aim of this study was to evaluate and compare the effects of two self-etch adhesive materials on the induction of oxidative stress and production of transforming growth factor-β1 (TGF-β1) and bone morphogenetic protein-2 (BMP-2) by cultured human gingival fibroblasts (HGF). Inflammation-free attached gingiva was obtained from healthy donors under informed consent. Following 24- and 72-h exposure of HGF to two different elutes of the test materials, cell viability was determined using the 3-(4,5-dimethyl-2-thiazolyl)-2,5-diphenyl tetrazolium bromide (MTT) assay. Lipid peroxidation, a major indicator of oxidative stress, was measured by the thiobarbituric acid reactive substance (TBARS) assay. TGF-β1 and BMP-2 levels in cell-free culture media were determined by enzyme-linked immunosorbent assay (ELISA). Cell viability of the test groups was significantly lower than those of control at 24 and 72 h (P < 0.001), but showed an increase at 72 h (P < 0.001). The TBARS levels of both test groups were significantly greater than that of control (P < 0.05), and displayed similar values at 72 h (P > 0.05). For both materials, the levels of TGF-β1 and BMP-2 were significantly greater than that of control (P < 0.05). Both test groups showed increased TGF-β1 levels. These results indicate that the tested self-etch adhesives might be capable of inducing production of TGF-β1 and BMP-2 in cultured HGF, despite their cytotoxic and oxidative stress-producing potential.     

Combination of BMP-2-releasing gelatin/β-TCP sponges with autologous bone marrow for bone regeneration of X-ray-irradiated rabbit ulnar defects

The objective of this study is to evaluate the feasibility of gelatin sponges incorporating β-tricalcium phosphate (β-TCP) granules (gelatin/β-TCP sponges) to enhance bone regeneration at a segmental ulnar defect of rabbits with X-ray irradiation. After X-ray irradiation of the ulnar bone, segmental critical-sized defects of 20-mm length were created, and bone morphogenetic protein-2 (BMP-2)-releasing gelatin/β-TCP sponges with or without autologous bone marrow were applied to the defects to evaluate bone regeneration. Both gelatin/β-TCP sponges containing autologous bone marrow and BMP-2-releasing sponges enhanced bone regeneration at the ulna defect to a significantly greater extent than the empty sponges (control). However, in the X-ray-irradiated bone, the bone regeneration either by autologous bone marrow or BMP-2 was inhibited. When combined with autologous bone marrow, the BMP-2 exhibited significantly high osteoinductivity, irrespective of the X-ray irradiation. The bone mineral content at the ulna defect was similar to that of the intact bone. It is concluded that the combination of bone marrow with the BMP-2-releasing gelatin/β-TCP sponge is a promising technique to induce bone regeneration at segmental bone defects after X-ray irradiation.     

BMP-4在卵巢早衰小鼠卵巢中的变化

目的分析BMP-4在化疗后卵巢早衰(POF)小鼠卵巢中的表达,探索BMP-4与卵巢早衰卵巢中卵泡发育的关系,为卵巢早衰的发病机制及临床治疗的研究提供参考依据。方法选用48只4~5周龄具有正常动情周期的雌性昆明小鼠随机分为3组:POF组,腹腔注射环磷酰胺,皮下注射白消安建立卵巢早衰模型;对照组,腹腔注射0.9%的生理盐水;正常组。观察并记录小鼠的一般情况,应用HE染色、免疫组织化学技术和Western blot技术,观察卵巢形态学变化、各级卵泡数的变化及BMP-4的分布情况。结果 1POF组小鼠体重下降,卵巢体积缩小,HE染色显示卵泡数目减少,原始卵泡数目(15.44±2.16)与正常组(55.25±16.09)和对照组(53.37±18.11)相比明显减少(P0.05)。2免疫组化结果显示BMP-4在正常组卵巢和对照组卵巢中的表达比在POF组卵巢中的表达高。3免疫组化结果显示BMP-4在POF卵巢中的表达明显减少,其中原始卵泡(39.83±6.50)减少最为明显,与正常组(68.61±5.25)和对照组(66.72±6.26)相比差异有统计学意义(P0.05)。4Western blot结果显示POF卵巢中的BMP-4表达最低,约为正常组的0.6倍(P0.05)。结论 POF组的BMP-4表达降低明显,在原始卵泡中降低最为明显,推测其对原始卵泡的存活和发育及调控卵泡闭锁有促进作用。     

Assessment of airborne mycoflora in critical areas of the Principal Hospital of Cumaná, state of Sucre, Venezuela

The study of the nosocomial infections of fungic origin has attained importance in the last years, due to the rise in the number of patients that are inmunocompromised and susceptible to suffer this kind of infection. The objective of the present study was to evaluate the frequency of filamentous fungi and yeast, present in the environment of the Intensive Care Unit, operating and newborn children rooms of the Hospital Universitario "Antonio Patricio de Alcalá" (HUAPA) from the city of Cumaná. Suere State, Venezuela. The recount of colony forming units/plate (UCF/plate) of the filamentous fungi and yeast was done in Petri plates with Sabouraud dextrose agar, which were exposed in the different studied areas. Eventually, the fungus colonies found were isolated and identified. The area that presented the highest average of UCF/plate was the Intensive Care Unit (9 UCF/plate). The isolated genus of filamentous fungus in higher proportion were Aspergillus (46.80%), Penicillium (19.19%) and Fusarium (11.06%). The isolated species with more frequency were Aspergillus niger (24.80%), Aspergillus flavus (10.54%) and Fusarium solani (9.52%). Rhodotorula glutinis was the isolated yeast with most frequency and different species of the genus Candida and the genus Criptococcus were isolated as well.     

仙灵骨葆胶囊对骨质疏松症大鼠BMP-2、BMP-4、TGF-β1和PKC蛋白表达影响

目的探讨仙灵骨葆胶囊对骨质疏松症大鼠骨形成蛋白-2(BMP-2)、骨形成蛋白-4(BMP-4)、转化生长因子β1(TGF-β1)和蛋白激酶C(PKC)蛋白表达影响。方法 40只SD大鼠随机分为假手术组、模型组、对照组和实验组,每组大鼠10只。假手术组给予等剂量生理盐水灌胃;模型组:给予等剂量生理盐水灌胃;对照组:给予盖天力牡蛎钙0.3 g/kg灌胃;实验组:给予仙灵骨葆胶囊0.4 g/kg灌胃。各组大鼠灌胃均为每日1次,连续灌胃8周。采用双能X线骨密度仪检测股骨和腰椎骨密度;采用ELISA法检测血清Ca和P含量;采用免疫组化法检测骨组织BMP-2、BMP-4、TGF-β1和PKC蛋白表达。结果除假手术组,其余各组大鼠均造模成功。模型组、对照组、实验组股骨和腰椎骨密度低于假手术组(P0.05);对照组、实验组股骨和腰椎骨密度高于模型组(P0.05);实验组股骨和腰椎骨密度高于对照组(P0.05)。模型组、对照组、实验组血清Ca和P含量低于假手术组(P0.05);对照组、实验组血清Ca和P含量高于模型组(P0.05);实验组血清Ca和P含量高于对照组(P0.05)。模型组、对照组、实验组BMP-2、BMP-4和PKC蛋白表达高于假手术组,而TGF-β1蛋白表达低于假手术组(P0.05);对照组、实验组BMP-2、BMP-4和PKC蛋白表达低于模型组,而TGF-β1蛋白表达高于假手术组(P0.05);实验组BMP-2、BMP-4和PKC蛋白表达低于对照组,而TGF-β1蛋白表达高于对照组(P0.05)。结论仙灵骨葆胶囊可增加骨质疏松症大鼠骨密度,认为可能与下调BMP-2、BMP-4和PKC蛋白表达及上调TGF-β1蛋白表达相关。     

重组人BMP-2的基因克隆及原核表达

目的 构建重组人骨形态发生蛋白2(recombinant human bone morphogenetic protein-2,rhBMP-2)的原核表达质粒并在大肠埃希菌中诱导表达.方法 采用RT-PCR法,从骨髓细胞总RNA中扩增获得人BMP-2成熟肽cDNA,将其克隆入表达载体pBV220,构建BMP-2的重组原核表达质粒.重组质粒经酶切和测序鉴定后,在大肠埃希菌中诱导表达目的蛋白,表达产物采用Western印迹和ELISA进行鉴定.结果 测序表明,重组基因序列与人BMP-2成熟肽基因完全一致.Western印迹和ELISA检测显示,表达产物的相对分子量(Mr)与预期结果相符,与相应抗体有结合活性.结论 获得了人BMP-2成熟肽的编码基因,并构建了含有该基因的重组质粒pBV220/BMP-2,在大肠埃希菌中可高效表达人BMP-2.     

前列腺癌组织中BMP-4的表达及临床意义

目的探讨骨形态发生蛋白-4(bone morphogenetic protein-4,BMP-4)在前列腺癌组织中的表达,分析其表达下调对前列腺癌细胞增殖和侵袭的影响。方法采用免疫组化En Vision法检测58例前列腺癌及40例前列腺良性增生(benign prostatic hyperplasia,BPH)组织中BMP-4蛋白的表达;利用Western blot法检测前列腺癌细胞(LNcap、PC-3、Du145)和BPH细胞中BMP-4蛋白的表达;将BMP-4 siRNA和对照siRNA分别转染LNcap,分为未处理组、对照siRNA组和BMP-4 siRNA组,采用Western blot法检测三组LNcap细胞中BMP-4、MMP-2和MMP-9的表达量;利用CCK8分别检测三组细胞的增殖能力;采用Tanswell小室实验检测三组细胞的侵袭能力。结果前列腺癌组织中BMP-4蛋白阳性率高于BPH组织(P 0. 05),BMP-4蛋白在前列腺癌细胞中的表达量高于BPH细胞。BMP-4 siRNA组细胞中BMP-4蛋白表达低于未处理组和对照siRNA组; BMP-4 siRNA组细胞增殖能力及细胞侵袭能力均低于未处理组和对照siRNA组。BMP-4 siRNA组细胞中MMP-2和MMP-9蛋白表达量低于未处理组和对照siRNA组。结论 BMP-4高表达于前列腺癌组织中,与前列腺癌细胞增殖和侵袭相关,有望成为前列腺癌潜在的治疗靶点。     

Effects of flurbiprofen on CRP, TNF-α, IL-6, and postoperative pain of thoracotomy

Objective: The aims of this study were to evaluate serum levels of acute phase reactants, such as CRP and cytokines (TNF-α and IL-6) in patients who have undergone thoracotomy and to investigate the effects of flurbiprofen on postoperative inflammatory response.Methods: Forty patients undergoing posterolateral thoracotomy were randomly divided into 2 groups of 20 each. Control group received tramadol (4 x 100 mg) intravenously for four days, and flurbiprofen group received both tramadol (4 x 100 mg) and flurbiprofen (2 x 100 mg). Blood samples were collected before surgery and at the 3th and 168th hours after surgical procedure to measure serum CRP, IL-6, and TNF-α. Pain visual analog scales were recorded daily during the first four postoperative days. Spirometric measurement of forced expiratory volume in the first second (FEV 1) was done before and four days after the operation.Results: The serum CRP, IL-6, and TNF-α levels in both groups increased significantly at 3th hour after thoracotomy. Serum TNF-α levels did not differ significantly between the groups at postoperative 4th day. However, IL-6 and CRP were significantly lower in flurbiprofen group than in control group at the same day (p<0.05). Visual analog scale was significantly lower in flurbiprofen group at 6th, 12th, 48th, 72th, and 96th hours postoperatively (p<0.05). The patients receiving flurbiprofen had higher FEV 1 values when compared with control group at postoperative 4th day.Conclusions: Patients undergoing thoracotomy showed reduced postoperative pain, mean additional analgesic consumption, and serum IL-6 and CRP levels, when flurbiprofen was added to systemic analgesic therapy. Analgesia with anti-inflammatory drug may contribute to the attenuation of the postoperative inflammatory response and prevent postoperative pain in patients undergoing thoracotomy.     

Analysis of trajectories of eye,head, and hand movements for early diagnosis of Parkinson’s disease

Relationships between eye, head, and hand movements in patients with stages I–II Parkinson’s disease were studied using an original method. The tests for individual movements in patients and healthy individuals yielded similar results, while coordination test revealed significant differences. __________ Translated from Byulleten’ Eksperimental’noi Biologii i Meditsiny, Vol. 143, No. 5, pp. 484–486, May, 2007     

Integration of two models, or dominance of one?

Hobbis and Sutton attempted to integrate Cognitive Behavior Therapy (CBT) with the Theory of Planned Behavior (TPB). The possibility of such an integration portends exciting opportunities since behavioral interventions have had limited impact on behavior change. The integration, however, may more easily occur if Hobbis and Sutton had selected a formulation of the TPB that incorporated emotional variables, which is a primary focus of CBT. Furthermore, more work may be necessary to integrate the specific cognitive constructs between CBT and the TPB. Empirical research will be necessary to validate that the integration occurred in a meaningful way.     

BMP-2和VEGF在乳腺癌的表达及意义

目的探讨骨形成蛋白-2(BMP-2)和血管内皮生长因子(VEGF)在乳腺癌的表达及其与乳腺癌临床病理因素的关系。方法应用免疫组织化学S-P法检测68例乳腺浸润性导管癌组织BMP-2和VEGF的表达情况,应用WesternBlot方法检测30例乳腺癌、5例癌旁正常组织中BMP-2和VEGF的表达情况。结果BMP-2蛋白阳性信号位于乳腺癌细胞浆内,VEGF蛋白主要分布于乳腺癌与正常乳腺上皮细胞的胞浆内。有淋巴结转移的乳腺癌组织BMP-2和VEGF的表达明显高于无淋巴结转移者(<0.01);且BMP-2和VEGF表达与临床分期有关,与患者年龄、肿瘤大小无明显相关性。Western Blot结果显示BMP-2和VEGF在有淋巴结转移患者中表达高于无淋巴结转移者(<0.01)。结论BMP-2和VEGF在乳腺癌高表达与乳腺癌的淋巴结转移和临床分期有关。     

腺病毒载体介导BMP-2基因修复骨缺损的研究进展

腺病毒载体(Adv)介导的骨形态发生蛋白2(BMP-2)转基因方法被认为是目前最有效的转基因诱导成骨修复骨缺损的方法之一。进一步改造腺病毒载体,降低免疫原性,提高基因治疗的安全性,已成为目前研究工作的重点。在参考大量的相关文献基础上,现就腺病毒载体基因治疗骨缺损的研究概况、宿主免疫应答问题以及解决方案几个方面,对介导BMP-2基因修复骨缺损的腺病毒载体的研究进展作一综述。     

Identification and characterization of the ribosome-associated protein, HrpA, of Bacillus Calmette-Guérin

HrpA was found as a ribosome-associated protein which appeared in heat-stressed Mycobacterium bovis Bacillus Calmette-Guérin. Here, we have studied the function of HrpA in vitro. HrpA is a heat shock protein belonging to a small heat shock protein family. The putative molecular mass was 17784.86 kDa. Recombinant HrpA formed large complexes of nonamer or dodecamer. HrpA prevented the aggregation of enzymes under heat shock conditions, and it formed stable complexes with partially denatured enzymes. HrpA was induced temporarily by oxygen repletion after anaerobic condition.     

兔抗人BMP-2成熟肽抗血清的制备

目的利用在大肠杆菌中表达的人骨形成蛋白-2(hBMP-2)成熟肽,制备兔抗hBMP-2成熟肽抗血清.方法将含有hBMP-2成熟肽基因的表达载体pDH2m,转化大肠杆菌,热诱导表达hBMP-2成熟肽,经纯化、复性后,再用其免疫兔子,制备兔抗hBMP-2成熟肽抗血清.并以Western-blot和免疫组化方法对抗血清进行鉴定.结果Western-blot结果显示在对应于hBMP-2成熟肽位置有阳性条带,免疫组化结果显示人软骨细胞胞浆阳性着色.结论hBMP-2成熟肽在大肠杆菌中获得高表达,并成功制备了兔抗hBMP-2成熟肽抗血清.