寿光黑鸡成纤维细胞的体外培养与冷冻保存

[目的]建立鸡成纤维细胞的体外培养体系。[方法]用组织块法和消化法分别分离培养鸡皮肤成纤维细胞;比较细胞生长速率及冻存复苏率。[结果]酶消化培养的成纤维细胞原代生长较快,约5 d便可形成单层;2种方法传代细胞的生长速度相似,仅需2~3 d就可形成单层;使用酶消化法和反复贴壁法,经3~4代后,可获得纯化的成纤维细胞;成纤维细胞经冷冻复苏后有75%~80%存活;分离纯化的胚胎和皮肤成纤维细胞的生长曲线均正常,可传至12代,传代后染色体数目不变。[结论]采用组织块法及酶消化法培养鸡成纤维细胞均可获得ES细胞建系所需的饲养层细胞。该研究为ES细胞系的成功建立奠定了基础。     

两种奶牛真皮成纤维细胞分离培养方法的比较

为了比较两种体外分离和培养奶牛真皮成纤维细胞方法，采集奶牛蹄部真皮组织，通过组织块贴壁法和双酶消化法（胰蛋白酶-Ⅰ型胶原酶）分离原代奶牛真皮成纤维细胞，通过传代培养进一步纯化并扩增。利用显微镜观察细胞形态及生长特性，MTT法用于绘制细胞生长曲线，利用细胞免疫荧光技术检测其表面标志物，鉴定细胞纯度。倒置显微镜下观察，贴壁后第6天有细胞爬出，形态多呈长梭形，排列紧密呈漩涡状或束状；双酶消化组第2天有长梭形细胞生长，混杂少量上皮细胞生长。生长曲线图表示，组织块贴壁组细胞生长速度较快。免疫化学荧光检测第四代奶牛真皮成纤维细胞，波形蛋白呈阳性表达，角蛋白-18呈阴性表达，表示细胞纯度较高。两种方法均能分离出奶牛真皮成纤维细胞，与双酶消化法相比，组织块贴壁法分离的细胞纯度更高，活性更佳，增殖周期更短，提示组织块贴壁法是分离培养奶牛真皮成纤维细胞的首选方法。     

小鼠胎儿成纤维细胞的分离培养及饲养层制备

对不同日龄小鼠胎儿的成纤维细胞及在不同细胞浓度下成纤维细胞体外培养生长状况和制备饲养层的差异,选择最佳条件。结果表明,分离培养不同日龄（１１ｄ、１４ｄ、１７ｄ）小鼠胎儿成纤维细胞,细胞生长状况无明显差异,由其制备的ＥＳ细胞饲养层生长状况亦无明显差异,成纤维细胞的培养以１×１０＾６个／ｍｌ细胞浓度为好,达寺或过小都不利于细胞生长。     

血清体积分数对培养黑山羊成纤维细胞的影响

为了建立并完善吕梁黑山羊耳缘成纤维细胞培养体系,为进一步的克隆试验提供最佳生长状态的供体细胞,在常规培养液的基础上添加不同浓度的新生牛血清(0,5%,10%,20%,40%),每天在倒置显微镜下观察培养细胞的生长状态,并用台盼蓝染色法统计细胞数目,连续观察7 d,绘制生长曲线,比较不同血清体积分数的培养液对吕梁黑山羊耳缘成纤维细胞体外培养的影响。结果表明,吕梁黑山羊耳缘成纤维细胞虽然在不同血清体积分数的5组中均有生长增殖,但生长状态不同,差距较大;其中,10%的血清培养液试验组培养的细胞生长状况最好,细胞形态完整清晰,增殖快,数量多,更适合此细胞的生长。不同体积分数血清的培养液对成纤维细胞的生长具有一定影响,10%血清体积分数的培养液最适合吕梁黑山羊耳缘成纤维细胞的培养。结果可为进一步研究克隆、基因转染、构建基因文库等提供生物学材料。     

广西巴马小型猪成纤维细胞体外培养体系的建立

为建立广西巴马小型猪腹部成纤维细胞、耳成纤维细胞、睾丸成纤维细胞、肺部成纤维细胞及脾成纤维细胞体外培养体系,以新生巴马小型猪为试验材料,使用微量液体组织块贴壁法原代培养分离几种成纤维细胞,进行常规传代培养、冷冻和复苏;根据细胞的形态、生长特性等观察其体外生长能力和增殖寿命.结果显示,广西巴马小型猪腹部成纤维细胞、耳成纤维细胞、睾丸成纤维细胞、肺部成纤维细胞及脾成纤维细胞获得成功分离,体外可以传代和冷冻;冷冻复苏后仍可以正常培养和传代;腹部成纤维细胞免疫荧光检测结果显示波形蛋白表达阳性,角形蛋白表达阴性.研究成果可为显微操作核移植、手工核移植和转基因相关操作等提供不同类型的供体材料.     

不同日龄鹅胚成纤维细胞的分离培养及活力研究

选择发育良好的9、11、13和15胚龄的马岗鹅鹅胚各3枚,分离鹅胚成纤维细胞并培养,于24、48、72、96、120和144 h分别进行细胞计数绘制不同胚龄成纤维细胞的生长曲线、检测细胞活力及细胞增殖率.结果显示,9、11日龄鹅胚成纤维细胞状态更好,死细胞和杂细胞较少;11日龄鹅胚成纤维细胞的细胞生长曲线最理想,活细胞比例为4个日龄中最高;9、11和13日龄鹅胚成纤维细胞的增殖率均保持在较高的水平.11日龄鹅胚更适合用于分离培养成纤维细胞.     

山羊成纤维细胞体外培养研究

分别采用组织块法与消化法对山羊耳成纤维细胞进行原代培养,比较两种方法的培养效果.结果表明,组织块法培养的细胞生长稳定,5～7d有细胞生长,15～18d长满单层;消化法培养的细胞,通过简化酶作用时间及用量的调控,可得到较为单一的成纤维细胞,且经过4～7d生长后能形成单层.同时对细胞培养过程中常遇到的污染问题及解决方法进行了探讨,为动物组织培养研究提供了实验依据.     

南阳牛成纤维细胞的体外培养及生物学特性研究

建立了南阳牛成纤维细胞系,旨在为制备转基因克隆牛提供核供体细胞。以南阳牛耳缘组织作为试验材料,通过组织块法培养分离南阳牛成纤维细胞,并进行生物学特性分析。结果表明,含有15%FBS的DMEM/F12培养基较适合原代牛成纤维细胞的体外培养。分析了细胞冻存前和复苏后的活率,分别为95.9%和90.2%,差异不显著;生长曲线表明细胞生长正常。南阳牛成纤维细胞传至第6代时,细胞核型正常。流式细胞仪检测结果显示,G0-G1期的F4和F8代细胞占细胞总数的64.35%和64.53%,F11代细胞占细胞总数的81.90%。在S期,F4代细胞占细胞总数的30.69%,F11代细胞占细胞总数的16.37%。结果表明,所培养的南阳牛成纤维细胞可作为体细胞核移植的供体细胞进行转基因克隆牛方面的研究。     

甜菜碱对三黄鸡胚胎原代成纤维细胞生长和增殖的影响

【研究目的】研究了不同剂量甜菜碱对三黄鸡胚胎原代成纤维细胞微核和增殖的影响,在细胞水平上揭示甜菜碱对三黄鸡生长影响的机理,为甜菜碱在动物生产中的应用提供依据。【方法】体外分离培养三黄鸡胚胎成纤维细胞,在培养液中添加不同剂量甜菜碱,观察细胞生长及分裂。【结果】①在基础培养液(DMEM 15%NBS)中添加10mM,20mM甜菜碱对三黄鸡胚胎原代成纤维细胞微核率无显著影响;添加30mM,40mM,50mM甜菜碱显著提高三黄鸡胚胎原代成纤维细胞的微核率。②在基础培养液(DMEM 15%NBS)中添加10mM、20mM甜菜碱能促进三黄鸡胚胎原代成纤维细胞的生长和增殖,以在培养液中添加20mM甜菜碱时三黄鸡原代成纤维细胞增殖速度最快。添加50mM甜菜碱时抑制了三黄鸡胚胎原代成纤维细胞的生长和增殖。【结论】低剂量甜菜碱可促进三黄鸡胚胎原代成纤维细胞的生长和增殖,高剂量甜菜碱对细胞分裂构成危害。     

延边奶山羊耳成纤维细胞体外培养的研究

为了给延边奶山羊转基因核移植及乳腺生物反应器研究提供足够且状态良好的细胞,采取延边奶山羊耳部组织块,利用组织块贴壁法进行原代培养和传代培养,对于纯化了的成纤维细胞观察其生长状态,并对4代以后的成纤维进行生长曲线、核型分析,并对细胞进行冷冻复苏试验,检测细胞活力.结果表明,4～13代体外培养成纤维细胞的细胞形态及核型基本正常,13代以后,细胞染色体变异比例增加,15代以后,细胞生长速度减慢;冷冻复苏后的细胞除生长速度减慢外,其它细胞生物学特征均正常,基本符合体细胞克隆、转基因等试验的基本要求,可以用于试验研究.     

Cellular senescence in aging primates

The aging of organisms is characterized by a gradual functional decline of all organ systems. Mammalian somatic cells in culture display a limited proliferative life span, at the end of which they undergo an irreversible cell cycle arrest known as replicative senescence. Whether cellular senescence contributes to organismal aging has been controversial. We investigated telomere dysfunction, a recently discovered biomarker of cellular senescence, and found that the number of senescent fibroblasts increases exponentially in the skin of aging baboons, reaching >15% of all cells in very old individuals. In addition, the same cells contain activated ataxia-telangiectasia mutated kinase and heterochromatinized nuclei, confirming their senescent status.     

Cellular localization of somatomedin (insulin-like growth factor) messenger RNA in the human fetus

The somatomedins or insulin-like growth factors (IGFs) are synthesized in many organs and tissues, but the specific cells that synthesize them in vivo have not been defined. By in situ hybridization histochemistry, IGF I (somatomedin C) and IGF II messenger RNAs were localized to connective tissues or cells of mesenchymal origin in 14 organs and tissues from human fetuses. IGF messenger RNAs were localized to perisinusoidal cells of liver, to perichondrium of cartilage, to sclera of eye, and to connective tissue layers, sheaths, septa, and capsules of each organ and tissue. All of the hybridizing regions are comprised predominantly of fibroblasts or other cells of mesenchymal origin. Because these cells are widely distributed and anatomically integrated into tissues and organs, they are ideally located for production of IGFs, which may exert paracrine effects on nearby target cells.     

陕北白绒山羊Lhx2毛囊表达载体构建及转染成纤维细胞的研究

以陕北白绒山羊毛囊生长期皮肤组织cDNA为模板,扩增出Lhx2基因的CDS区,成功构建了以KAP6.1为启动子表达Lhx2基因的绿色荧光表达载体pIRES2-KAP-LHX-EGFP.并利用脂质体介导转染绒山羊胎儿成纤维细胞,通过G418筛选获得了稳定转染的细胞系,经PCR检测显示外源基因已整合到细胞基因中.研究结果为进一步开展Lhx2基因对绒山羊毛囊发育的影响和转Lhx2基因绒山羊的生产提供了前期研究基础.     

寿光黑鸡成纤维细胞的体外培养与冷冻保存(英文)

[Objective] The aim of this study was to establish the in vitro culture system of chicken fibroblasts.[Method] Tissue explant method and enzymatic digestion method were used to separate and culture chicken skin fibroblasts respectively.The rate of cell growth,cryopreservation and recovery were compared.[Result] The primary chicken fibroblasts prepared by enzymatic digestion grew faster and converged together to form monolayer on 5 d post preparation;the passage cells prepared by these 2 methods grew at similar speed and formed monolayer within 2-3 d;homogeneous fibroblasts could be obtained by trypsin digestion and repeated attachment for 3-4 passages;there were 75%-80% of cells survived after cryopreservation and recovery;the growth curves of embryonic fibroblasts and skin fibroblasts were all normal and the two kind of cells still retained the normal number of chromosomes even at the twelfth passage.[Conclusion] The feeder layer cells needed for establishing ES cell lines could be obtained by culturing chicken fibroblasts through both tissue explant method and enzymatic digestion method.This study provided a basis for the successful establishment of ES cell lines.     

慢病毒载体介导成纤维细胞高效稳定表达绿色荧光蛋白

 试验尝试建立稳定表达外源基因的人成纤维细胞系。取成年男性包皮皮肤的皮下组织,分离培养人皮肤成纤维细胞,分别采用脂质体和慢病毒载体介导转染人皮肤成纤维细胞表达绿色荧光蛋白。结果显示,来自成年人包皮皮下组织的成纤维细胞呈梭形,具有快速的增殖和稳定的生长性能。脂质体介导转染的人皮肤成纤维细胞绿色荧光蛋白表达不稳定,阳性细胞表达率低,转染后的人成纤维细胞变得更为细长,细胞生长速度降低。慢病毒载体介导人皮肤成纤维细胞高效稳定表达绿色荧光蛋白,转染后细胞生长性能和形态没有变化,经过多次传代和冻存复苏对人皮肤成纤维细胞绿色荧光蛋白的表达没有影响,通过流式细胞仪对慢病毒介导表达绿色荧光蛋白的人皮肤成纤维细胞检测显示,绿色荧光蛋白表达阳性率为99.85%,并且表达绿色荧光蛋白的人皮肤成纤维细胞细胞均一程度为76.05%。试验证实了慢病毒载体能够高效稳定介导人皮肤成纤维细胞表达绿色荧光蛋白。     

拟胚体对成体细胞参与胚胎嵌合的影响

试验尝试构建成体细胞同小鼠早期胚胎的嵌合共生胚胎.取成年人皮肤组织的成纤维细胞,慢病毒转染皮肤成纤维细胞标记EGFP荧光蛋白,同小鼠早期8-细胞胚胎进行嵌合.结果显示慢病毒高效标记人皮肤成纤维细胞表达EGFP荧光蛋白,通过皮肤成纤维细胞与小鼠胚胎干细胞形成的拟胚体环境作用后,皮肤成纤维细胞成功与小鼠胚胎形成嵌合胚,嵌合囊胚形成率为38.08%,表达EGFP荧光蛋白的皮肤成纤维细胞能够嵌合到小鼠胚胎的不同部位.嵌合胚在胚胎干细胞分离培养环境下进行培养,嵌合到小鼠内细胞团的皮肤成纤维细胞参与小鼠内细胞团的组成,参与小鼠内细胞团组成的胚胎占嵌合胚比率为1.74%.小鼠胚胎干细胞拟胚体环境作用可以成功介导人皮肤成纤维细胞同小鼠早期胚胎形成嵌合共生体系.     

Enhanced dexamethasone resistance in cystic fibrosis cells: potential use for heterozygote detection and prenatal diagnosis

Cultured skin fibroblasts from patients with cystic fibrosis (CF) are more resistant to dexamethasone toxicity than are normal cells. We now report that, when fibroblasts cultured from obligate CF heterozygotes are exposed to dexamethasone, they have an intermediate survival compared to normal and homozygous CF cells. When dexamethasone survival was tested on cells from four patients undergoing amniocentesis, cells from a woman at risk of producing a child with CF showed significant dexamethasone resistance, similar to that of fibroblasts derived from lnown CF homozygotes; the other amniotic cell specimens showed dexamethasone sensitivity similar to that of normal skin fibroblasts. These data suggest that the dexamethasone resistance previously observed in skin fibroblasts may also be useful in the prenatal diagnosis of CF.     

兔成纤维细胞的分离与体外培养

用Ⅰ型、Ⅳ型胶原酶消化分离兔皮肤细胞,Ⅰ型胶原酶消化皮肤块获得的细胞数显著高于Ⅳ型胶原酶。用组织块直接培养法,也可以得到皮肤的原代培养细胞。２．５ｇ／Ｌ胰酶消化胎儿组织,可获得足够原代培养的细胞量。结合使用酶消化法和反复贴壁法,经２～３代后,可获得纯化的成纤维细胞。分离纯化的胎儿和皮肤成纤维细胞的生长曲线都正常且相似。胎儿和皮肤成纤维细胞可分别传至第１３代与第１１代,传代后染色体数目不变。     

Human chromosome 21 dosage: effect on the expression of the interferon induced antiviral state

Human primary skin fibroblasts trisomic for chromosome 13, 18, or 21 and diploid human skin fibroblasts were induced for an antiviral response with human interferon. The cells that were trisomnic for chromosome 21 were three to seven times more sensitive to protection by human interferon than the normal diploid or trisomic 18 or 13 fibroblasts. The differential response in trisomnic 21 cells is consistent with the known assignment of the human antiviral gene to chromosome 21.     

Perineurium originates from fibroblasts: demonstration in vitro with a retroviral marker

A cellular sheath, the perineurium, forms a protective barrier around fascicles of nerve fibers throughout the peripheral nervous system. In a study to determine the cellular origin of perineurium, a culture system was used in which perineurium forms after purified populations of sensory neurons, Schwann cells, and fibroblasts are recombined. Before recombination, the Schwann cells or the fibroblasts were labeled by infection with a defective recombinant retrovirus whose gene product, beta-galactosidase, is histochemically detectable in the progeny of infected cells. Perineurial cells were labeled when fibroblasts had been infected but not when Schwann cells had been infected. Thus, perineurium arises from fibroblasts in vitro and, by implication, in vivo as well.