Effect of basic fibroblast growth factor(bFGF) on the treatment of exposure of the orbital implants

Objective: To evaluate the efficacy and the indication of basic fibroblast growth factor (bFGF) in the treatment of exposure of orbital implants. Design: Retrospective and observational case series. Methods: We reviewed 41 patients (41 eyes) suffering exposure of orbital implants from Jan. 2000 to June 2006. The study group patients with mild exposure received com-bined treatment with bFGF and antibiotic drops, and while the control group patients with mild exposure were treated with anti-biotic drops only. The study group patients with moderate and severe exposure received combined treatment with bFGF and antibiotic drops, and after 2 months they were subjected to amniotic membrane transplantation, while the control group patients with moderate and severe exposure underwent amniotic membrane transplantation after using antibiotic drops. Observation of the growth of conjunctival epithelium and comparison of the healing rate of the two groups. Results: The healing rates of the mild, moderate and severe exposure study group were 100% and 92.3%. The healing rates of the mild, moderate and severe exposure control group were 55.6% and 66.7% respectively. The difference of the healing rates of the mild exposure study group and the control group was significant (P=0.033). And the difference of the healing rates of the moderate and severe exposure study group and the control group was not significant (P=0.167). Conclusion: bFGF may promote obviously the healing of orbital implant exposure, particularly it can be the first choice for the treatment of mild degree exposure. For the moderate and severe cases, it can be administered before surgical repair to enhance neovascularization and will tend to increase the success rate of surgical repair.

Usefulness of Basic Fibroblast Growth Factor (bFGF) Loaded Dissolving Microneedles for Local Therapy of Skin Wounds

Purpose: The usefulness of dissolving microneedles (DMs) for local skin therapy by basic fibroblast growth factor (bFGF) was studied in rats. Methods: We prepared four kinds of bFGF-loaded DMs, approximately 500 μm length and 300 μm diameter at the bottom. Long-term stability and dissolution studies were performed by HPLC method. Pharmacokinetic and pharmacological evaluations were performed after administration of bFGF loaded DMs to rats. Results: The bFGF contents were 2.15 ± 0.07, 1.07 ± 0.04, 0.56 ± 0.07 and 0.12 ± 0.03 μg. The 100.2 ± 3.4%, 100.2 ± 3.3%, 99.3 ± 1.4% and 100.4 ± 3.0% of bFGF were recovered after 1, 3 and 6 months and 1 year incubation at 40°C. The bFGF was released from DMs within 5 min. In a pharmacokinetic study using 2.0 and 1.0 μg bFGF-loaded DMs, no systemic exposure of bFGF was detected. The initial bFGF concentrations in the rat skin tissue after administration of bFGF-loaded DMs to the hair-removed rat abdominal skin were 510.2 ± 20.1 ng/g wet weight for 2 μg bFGF DMs and 264.2 ± 56.5 ng/g wet weight for 1 μg DMs, declining slowly thereafter to 226.3 ± 33.5 and 105.1 ± 27.4 ng/g wet weight at 6 hr after administration. Good dose-dependency was observed. Pharmacological evaluation of bFGF-loaded DMs of 2.0, 1.0, 0.5, and 0.1 μg, in the wound healing rat model, all used DMs, but 0.1 μg DMs, showed good healing effects. Considered collectively, these results suggest the usefulness of bFGF-loaded DMs for local therapy of skin wound disease.

THE EFFECT OF BASIC FIBROBLAST GROWTH FACTOR SLOW-RELEASE MICROCAPSULES ON ANGIOGENESIS IN INFARCTED RABBIT MYOCARDIUM

Objectives To observe the effect of basic fibroblast growth factor (bFGF) slow-release microcapsules on angiogenesis in infarcted myocardial regions. Methods.Myocardial infarction was induced in 24 New Zealand rabbits by ligating the root of left anterior descending coronary artery.Group Ⅰ(n=8) served as control, group Ⅱ(n=8) as a blank microcapsule group, group Ⅲ(n=8, each microcapsule contains 1μg bFGF) as micrpcapsule group.In group Ⅱ and Ⅲ, 5 blank microcapsules or bFGF slow-release microcapsules were implanted into myocardium underneath the epicardium between the left anterior descending coronary artery and left circumflex artery.Infarct size was evaluated by infarcted weight/left ventricle weight ratio and angiogenesis was evaluated by immunohistochemical examinations 5 weeks later. [WT5”BX] Results.As compared with group Ⅰ and Ⅱ, rabbits treated with bFGF slow-release microcapsules showed higher microvessel counts (group Ⅰ3775±450, group Ⅱ3837±498,vs.group Ⅲ 13550±481,P<0001) and less infarcted weight /left ventricle weight (group Ⅰ168%±04%,group Ⅱ167%±05%,vs.group Ⅲ 70%±02%,P<0001). Conclusions.Subepicardial administration of bFGF slow-release microcapsule in the infarcted rabbit model results in effective angiogenesis and reduction in infarct size.

EXPRESSION AND SIGNIFICANCE OF BASIC FIBROBLAST GWOWTH FACTOR AND FIBROBLAST GROWTH FACTOR RECEPTOR-1 IN OVARIAN EPITHELIAL NEOPLASM

Objective To study the relevance of expression of basic fibroblast growth factor (bFGF), fibroblast growth factor receptor 1 (FGFR 1) and carcinogenesis and progression of ovarian epithelial neoplasm. Methods Ten cases of normal ovarian tissues and 75 cases of ovarian epithelial neoplasm tissues were detected by immunohistochemical methods: S P for bFGF, FGFR 1,double immunohistochemistry Lab SA for Ki 67 antigen and bFGF. Results The expression level of bFGF, FGFR 1in ovarian epithelium and ovarian epithelial neoplasm showed a step wise increase in the following order:normal <benign <borderline <malignant; The expression level and intensity of bFGF and FGFR 1 were increased with the decrease of differentiation degree and increase of clinical stage in ovarian carcinoma; There was no statistical difference between the expression of bFGF, FGFR 1 in serous cystadenocarcinoma and that of mucinous cystadenocarcinoma; The expression of bFGF was correlated with that of FGFR 1 in neoplastic tissues; There were positive expression rates of bFGF and Ki 67 antigen in ovarian epithelial neoplasm. Conclusion As an important proliferative factor, bFGF plays an important role in carcinogenisis and progression of ovarian epithelial neoplasm.

EXPRESSION OF VASCULAR ENDOTHELIAL GROWTH FACTOR AND BASIC FIBROBLAST GROWTH FACTOR IN HUMAN NON-SMALL CELL LUNG CANCER AND THEIR CLINICAL SIGNIFICANCE

Objective: To explore the expression of vascular endothelial growth factor(VEGF) and basic fibroblast growth factor(bFGF) in non-small cell lung cancer(NSCLC) and theIR clinical significance. Methods: The expression of VEGF and bFGF was examined at the protein levels by immunohistochemical staining in 96 NSCLC patients, and in 36 of which at the mRNA levels by reverse transcription-PCR analysis. Results: VEGF mRNAs were expressed predominately as its secretory forms (VEGF121 and VEGF165) in NSCLC tissues. The positive ratios of VEGF121 and VEGF165 were 69.5%(25 of 36) and 41.7%(15 of 36) respectively. The positive ratio of bFGF was 52.8(19 of 36) in the same tumor specimens. The positive ratios of VEGF and bFGF at protein levels were 55.55%(20 of 36) and 58.33%(21 of 36) respectively. A significant positive correlation was observed between VEGF and bFGF expression in NSCLC tissues(P=0.002). No significant interrelationship between VEGF, bFGF expression and clinical data(age, sex, histological subtype differentiation, P-stage, metastasis and survival) was found. Conclusions: VEGF and bFGF may play an important role in angiogenesis and act in a synergistic manner in NSCLC.

Effect of the implant composite of poly lactide-co-glycolide and bone mesenchymal stem cells modified by basic fibroblast growth factor on injured spinal cord in rats

Objective To investigate the effect of the implant composite of poly lactide-co-glycolide(PLGA)and bone mesenchymal stem cells (BMSCs) modified by basic fibroblast growth factor (bFGF) on injured spinal cord in rats.Methods Two hundred and

原发性急性闭角型青光眼患者房水中CXCR2和bFGF表达与小梁切除术后预后的关系

目的:探讨原发性急性闭角型青光眼(APACG)患者的房水中趋化因子受体2(CXCR2)、碱性成纤维细胞生长因子(bFGF)水平与小梁切除术后预后的关系。方法:收集2020-06/2022-01期间本院收治的80例80眼行小梁切除术的APACG患者纳入病例组,依据术后疗效分为成功组60例60眼和失败组20例20眼;收集同期本院行白内障超声乳化术且眼压正常的白内障患者86例86眼纳入对照组。采用酶联免疫吸附法检测房水中CXCR2、bFGF水平;采用ROC曲线分析房水中CXCR2、bFGF水平预测APACG患者小梁切除术失败的价值;APACG患者小梁切除术失败的影响因素采用多因素Logistic回归分析。结果:病例组房水中CXCR2、bFGF水平显著高于对照组(P<0.05)。失败组房水中CXCR2、bFGF水平及术后浅前房发生患者比例显著高于成功组(P<0.05)。房水中CXCR2、bFGF水平单独及联合预测APACG患者小梁切除术后失败的AUC分别为0.885、0.883、0.953。CXCR2、bFGF是APACG患者小梁切除术后失败的危险因素(P<0.05)。结论:APACG患者房水中CXCR2、bFGF水平显著升高,且二者均是小梁切除术后失败的危险因素。

自拟补肺健脾益肾方治疗慢性阻塞性肺疾病稳定期患者的临床疗效及对血清TGF-β1、bFGF、SOD水平的影响

【目的】探讨自拟补肺健脾益肾方治疗慢性阻塞性肺疾病(COPD)稳定期患者的临床疗效及对血清转化生长因子β1(TGF-β1)、碱性成纤维细胞生长因子(bFGF)、超氧化物歧化酶(SOD)水平的影响。【方法】将86例COPD稳定期肺脾肾虚证患者随机分为对照组和观察组,每组各43例。对照组给予布地奈德吸入剂吸入治疗,并予以常规戒烟、预防呼吸道感染和呼吸功能锻炼。观察组在对照组的基础上联合自拟补肺健脾益肾方治疗,疗程为3个月。观察2组患者治疗前后临床症状评分、慢性阻塞性肺疾病评估测量表(CAT)评分、肺功能指标以及血清TGF-β1、bFGF、SOD水平的变化情况,评价2组患者的临床疗效,并采用改良呼吸困难量表(m MRC)评估患者治疗后的呼吸困难改善情况。【结果】(1)治疗3个月后,观察组的总有效率为95.35%(41/43),对照组为81.40%(35/43),组间比较,观察组的疗效明显优于对照组(P<0.05)。(2)治疗后,2组患者的中医临床症状评分(包括主症评分和次症评分)、CAT评分和急性加重次数均较治疗前降低(P<0.05),且观察组的降低作用均明显优于对照组(P<0.05或P<0.01)。(3)治疗后,2组患者的1秒用力呼气容积(FEV1)、用力肺活量(FVC)及FEV1/FVC等肺功能指标均较治疗前改善(P<0.05),且观察组的改善作用均明显优于对照组(P<0.05或P<0.01)。(4)治疗3个月后,观察组患者的呼吸困难改善程度明显优于对照组(P<0.05)。(5)治疗后,2组患者血清SOD水平均较治疗前升高(P<0.05),血清TGF-β1、b FGF水平均较治疗前降低(P<0.05),且观察组对血清SOD水平的升高作用及对血清TGF-β1、bFGF水平的降低作用均明显优于对照组(P<0.01)。【结论】自拟补肺健脾益肾方对COPD稳定期患者疗效显著,可有效改善患者呼吸困难等临床症状与肺功能,降低急性加重发作次数,提高患者生活质量,其机制可能与清除自由基、降低气道炎症反应及纤维化有关。

Dual growth factor-immobilized microspheres for tissue reinnervation

It has been reported that various progenitor cells or stem cells and continuously released bioactive molecules can enhance the regeneration of muscles and thus help to treat chronic degenerative diseases,such as urinary/fecal incontinence and erectile dysfunction.However,the regeneration ofmuscles alone cannot be a fundamental cure of chronic degenerative diseases,because regenerated muscles with insufficient nerve connections subsequently lead tomuscle atrophy[1].

bFGF基因转染促进股骨头坏死修复的实验研究

目的 :为临床治疗股骨头及其它骨缺血性坏死探索新方法。方法 :将碱性成纤维细胞生长因子 (bFGF)真核表达质粒pCD rbFGF与胶原混合植入坏死的兔股骨头内 ,术后RT PCR及免疫组化方法检测bFGF表达情况 ,组织切片及组织形态学分析股骨头内血管生长及新骨形成情况。结果 :术后 2周RT PCR及免疫组化证实转染bFGF基因的股骨头内有bFGF表达。术后 2周股骨头内血管生长与对照组相比 ,术后 8周股骨头内新骨形成与对照组相比 ,差异均有非常显著意义 (P <0 .0 1)。结论 :利用bFGF基因转染可刺激股骨头坏死内血管再生和新骨形成 。

bFGF、FGF受体I在HEp-2喉癌和MGE803胃癌细胞株中表达的检测

目的 通过对碱性成纤维细胞生长因子 (basicfibroblastgrowthfactor ,bFGF) ,成纤维细胞生长因子受体 1(fibroblastgrowthfactorreceptor 1,FGFR 1)的检测 ,揭示两者在体内外的表达以及与肿瘤形成的关系。 方法 采用免疫组织化学的检测方法 ,检测了体外培养的HEP 2喉癌细胞和MGE80 3胃癌细胞以及由两者在裸鼠皮下形成的实体瘤组织中bFGF和FGFR 1的表达情况。 结果 在体外培养的这两种肿瘤细胞中bFGF的阳性染色存在于整个细胞。FGFR 1的染色主要存在于细胞核。在两种肿瘤细胞形成的实体瘤组织中bFGF和FGFR 1阳性染色细胞主要是围绕于坏死区的肿瘤细胞。 结论 此两种肿瘤细胞在体内外均能表达bFGF和FGFR 1。bFGF与其高亲和力受体FGFR 1结合后进入细胞核 ,并在细胞核内发挥其生物功能 ,参与了肿瘤组织的形成和发展。

以纤维蛋白胶为载体复合BMP和bFGF的注射型骨修复材料诱导异位成骨的实验研究

目的 :了解以纤维蛋白胶 (Fibrinsealant,FS )为载体的注射型骨修复材料异位诱导成骨的作用 ,为其临床的应用提供实验依据。方法 :实验分组为 :实验组b (FS +bFGF+bBMP)、对照组b1(FS +bBMP)、对照组b2 (bBMP)、实验组r (FS +bFGF +rhBMP 2 )、对照组r1(FS +rhBMP)、对照组r2 (rhBMP)、对照组FS及空白对照组。将各组材料注射或植入小鼠肌袋内 ,采用放射学、形态学、碱性磷酸酶 (ALP)检测等方法对其成骨效应进行研究。结果 :在以bBMP为成骨因子的实验区中 ,实验组b具有高效的骨诱导活性 ,其成骨量显著高于对照组b1、对照组b2、对照组FS及空白对照组(P <0 .0 1) ;在以rhBMP 2为成骨因子的实验区中 ,实验组r同样具有高效的骨诱导活性 ,其成骨量也显著高于对照组r1、对照组r2、对照组FS及空白对照组 (P <0 .0 1)。结论 :以FS为载体复合BMP和bFGF的注射型骨修复材料具有高效的骨诱导活性 ,bFGF可明显增强BMP的骨诱导活性。

胶质瘤中hTERT、maspin和bFGF表达的相关性及意义

背景与目的:人端粒酶逆转录酶(human telomerase reverse transcriptase,hTERT)是端粒酶激活的决定因子,与肿瘤的形成和恶性程度有关,其表达受多种因素的调控。本研究检测胶质瘤中hTERT、maspin和碱性成纤维细胞生长因子(basic fibroblast growth factor,bFGF)蛋白的表达,并分析它们的相关性及其与临床病理因素之间的关系。方法:应用原位杂交法、免疫组织化学SP法分别检测128例胶质瘤和8例正常脑组织中hTERT及maspin、bFGF蛋白的表达;检测结果的半定量评定参照Gatalica的H-score(H=I×P)系统;两组间率的比较用χ2检验;不同级别胶质瘤中hTERT、maspin和bFGF的表达采用Spearman等级相关分析;hTERT与maspin和bFGF表达之间的关系采用直线相关分析。结果:(1)胶质瘤中hTERT、maspin、bFGF阳性率分别为51.6%(66/128)、46.9%(60/128)、62.5%(80/128)。8例正常脑组织均不表达hTERT、bFGF,7例表达maspin。Ⅱ、Ⅲ、Ⅳ级胶质瘤中,hTERT阳性率分别为32.6%(14/43)、54.5%(30/55)、73.3%(22/30);maspin阳性率分别为58.1%(25/43)、49.1%(27/55)、26.7%(8/30);bFGF阳性率分别为39.5%(17/43)、72.7%(40/55)、76.7%(23/30)。hTERT、maspin和bFGF在正常脑组织和不同级别胶质瘤中的表达差异均有显著性(P﹤0.05),hTERT和bFGF表达与病理分级呈正相关(ρ=0.515,P﹤0.01;ρ=0.611,P﹤0.01),maspin表达与病理分级呈负相关(ρ=-0.425,P﹤0.05)。(2)hTERT表达与maspin蛋白表达呈负相关(r=-0.658,P<0.01),与bFGF蛋白表达呈正相关(r=0.627,P<0.01);maspin和bFGF蛋白表达呈负相关(r=-0.501,P<0.01)。(3)hTERT表达与年龄、性别、肿瘤直径和细胞密度无关(P>0.05),与核分裂相、血管密度、坏死显著相关(P<0.05)。结论:hTERT、maspin和bFGF三者间的表达有相关性,均与胶质瘤恶性程度有关。

bFGF对大鼠脊髓前角运动神经元的保护作用

利用大鼠坐骨神经钳夹损伤模型，观察了碱性成纤维细胞生长因子（ｂＦＧＦ）对大鼠脊髓前角运动神经元的保护作用。ＳＤ成年大鼠４０只，分成实验组和对照组，钳夹损伤大鼠坐骨神经。在实验组损伤侧受损的神经周围放入浸有ｂＦＧＦ的明胶海绵，对照组则用生理盐水浸泡海绵置于受损神经处。以大鼠右侧坐骨神经为正常自身空白对照。术后隔日一次向损伤侧腓肠肌肌注ｂＦＧＦ，对照组注射等量生理盐水。术后２、３、４、５周分别对每只大鼠进行心脏灌注固定，切取脊髓腰４～６节段，恒冷箱冷冻切片，Ｎｉｓｌ染色，观察脊髓前角运动元的形态，计算其数目，将损伤侧与正常侧比较，将ｂＦＧＦ治疗组与非治疗组作比较，统计学处理。结果：术后３、４、５周治疗组的损伤侧脊髓前角运动神经元存活率均大于对照组，且统计差异有显著性意义（Ｐ＜０．０５）。表明ｂＦＧＦ对坐骨神经钳夹损伤所导致的脊髓前角运动神经元胞体死亡有保护作用，也许可能成为运动神经元新的神经营养因子。

噬菌体展示技术筛选bFGF抗原表位

目的:以抗-bFGF单克隆抗体GF22为目标,用噬菌体随机七肽库进行筛选。经三轮筛选后的噬菌体阳性克隆能特异地抑制bFGF与CF22结合。测序结果表明与CF22结合的序列高度保守,为LP(P/L)GH(F/I)K,LPPGHFK与bFGF分子(155氨基酸)上22-27位氨基酸一致,表明该序列在bFGF上是一个主要的抗原表位。用此序列的阳性噬菌体克隆免疫小鼠,发现此序列摸拟肽能诱导抗bFGF抗体反应,且序列LPLGHIK诱导的抗体反应比LPPCHFK序列强三倍,序列LPLGHIK可能作为一种有价值的肽疫苗诱导抗bFGF抗体的产生。

bFGF单克隆抗体对卵巢癌移植瘤血管生成的抑制作用

目的:探讨碱性成纤维细胞生长因子(bFGF)在卵巢上皮性肿瘤中的表达强度与肿瘤血管生成之间的关系,及其单克隆抗体bFGFMAb对人卵巢癌移植瘤血管生成和肿瘤生长的影响。方法:(1)应用免疫组化法和图像分析系统研究bFGF在正常卵巢组织,良性、交界性和恶性卵巢上皮性肿瘤中的表达部位和强度;以及bFGF的表达强度与肿瘤新生血管的关系;(2)利用卵巢癌裸鼠皮下移植瘤模型,每周2次将不同浓度的bFGFMAb注射于瘤体周围,连续8周,每周测量肿瘤体积,绘制移植瘤生长曲线;对移植瘤组织行Ⅷ因子的免疫组化染色,测定肿瘤内微血管密度(MVD)。结果:(1)bFGF主要在卵巢上皮性肿瘤细胞浆内表达,在交界性和恶性肿瘤中,部分细胞同时存在核表达;bFGF在正常卵巢组织,良性、交界性和恶性卵巢上皮性肿瘤中的表达强度逐步增强,同时MVD逐步增高,二者呈正相关(P<0.001);(2)30、20、10μgbFGFMAb组移植瘤体积分别是对照组的31.34%、49.20%和71.25%,MVD分别是对照组的27.80%、52.37%和81.86%(P<0.05),其作用呈浓度依赖性。结论:bFGFMAb能明显抑制卵巢癌的血管生成和肿瘤生长,有望成为卵巢癌生物治疗的新方法。

VEGF和bFGF在浅表膀胱移行细胞癌中的表达及意义

背景与目的:血管内皮生长因子(vascularendothelialgrowthfactor,VEGF)和碱性成纤维细胞生长因子(basicfibroblastgrowthfactor,bFGF)都能促进血管内皮细胞分裂和诱导血管形成,是肿瘤的生长、浸润、和转移过程中非常重要的物质。但它们在单发性和多发性浅表膀胱移行细胞癌中表达的差异则未见报道,本研究主要是探讨VEGF和bFGF在浅表膀胱移行细胞癌中的表达及意义。方法:采用免疫组化法对60例浅表膀胱移行细胞癌组织及10例正常膀胱组织进行VEGF和bFGF的检测,观察单发性和多发性浅表膀胱移行细胞癌组织中VEGF和bFGF表达的关系。结果:多发性浅表膀胱移行细胞癌的VEGF阳性率为55.6%、bFGF阳性率为50.0%,以及VEGF和bFGF共同表达阳性率为50.0%,均明显高于单发者的水平,而高水平表达的多发性肿瘤患者的术后复发率61.1%也明显高于单发组的复发率(单发组的复发率16.7%)。结论:VEGF和bFGF表达水平的高低与浅表膀胱移行细胞癌的生物学行为有关。

EGF与bFGF对体外大鼠巩膜成纤维细胞增殖的影响

目的研究表皮生长因子（EGF）和碱性成纤维生长因子（bFGF）在体外对大鼠巩膜成纤维细胞生长的影响。为进一步了解近视发生的分子机制提供依据。方法采用植块法培养大鼠巩膜成纤维细胞。细胞经传代纯化鉴定后，取第3～4代细胞加入不同浓度的EGF（0．1～200ng／mL）、bFGF（0．1～50ng／mL）。分别培养24、48、72h用四甲基偶氮唑盐（MTT）法检测细胞的增殖密度。观察不同浓度、时间下细胞增殖情况。结果发现0．1～100ng／mL的EGF和0．1～50ng／mL的bFGF对大鼠巩膜成纤维细胞均有明显的促增殖作用，且呈剂量相关性。结论一定浓度的EGF、bFGF对体外培养的大鼠巩膜成纤维细胞的生长具有促进作用。

bFGF、TGF-β对人牙髓干细胞增殖和分化能力的影响

目的 :探讨 b FGF和 TGF-β对体外培养的人牙髓干细胞增殖和分化能力的影响。方法 :采用 MTT法分别测定了 b FGF和 TGF-β作用不同浓度、不同时间单独或联合作用对人牙髓干细胞增殖能力的影响。通过碱性磷酸酶活性检测、细胞形态学观察及 DSP、DMP-1免疫组化染色来检测这两种因子对人牙髓干细胞分化能力的影响。结果 :0～ 40 ng/ m L范围内 ,b FGF单独作用能显著促进人牙髓干细胞的增殖 ,且具有浓度和时间依赖性 ,而 TGF-β促增殖作用较弱 ;两者联合作用 ,促增殖作用无显著提高 ,而促分化作用显著增强 ,不仅细胞形态明显改变 ,而且碱性磷酸酶活性显著提高 ,DSP、DMP-1呈阳性表达 ,向成牙本质细胞样细胞分化。结论 :b FGF和 TGF-β对体外培养的人牙髓干细胞增殖和分化具有重要作用 ,为对探讨影响人牙髓干细胞增殖和分化的因素提供参考依据。

bFGF-PLGA微球促进随意皮瓣早期断蒂

目的 :探讨碱性成纤维细胞生长因子 -聚乳酸 /聚乙醇酸 (bFGF PLGA)微球促进随意皮瓣早期断蒂。方法 :通过复乳溶剂挥发法制备bFGF PLGA微球 ,采用60 Co辐照灭菌。将bFGF PLGA微球注入大鼠背部随意皮瓣下方 ,4d后断蒂 ,断蒂后 10d观察皮瓣成活率、新生微血管数量。并与单独使用bFGF组进行对比。结果 :皮瓣成活率A组为 (89 2± 2 6 0 ) %,B组为 (85 6± 2 9 7) %,C组为 (76 6± 3 2 2 ) %。新生血管数A组为 2 9 7,B组为 2 4 6,C组为 12。经统计学分析 ,各组间存在显著差异。结论 :bFGF PLGA微球能够更好地促进随意皮瓣的早期断蒂。