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在组织培养和细胞杂交工作中,培养细胞的保种十分重要。目前保存细胞的唯一途径是液氮冻存。我们试用简易冷冻技术和不同的冻存液,对数种细胞株/系进行了冻存、复苏试验,现报告如下。 相似文献
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牛胎儿成纤维细胞的分离培养 总被引：1，自引：0，他引：1
研究了牛胎儿组织成纤维细胞的分离、培养、纯化方法和生长特征,并对培养细胞的冷冻保存和复苏进行了观察.采取组织块培养法进行原代培养,在接种第5天到第6天成纤维细胞生长旺盛;用0.25%胰蛋白酶消化,传代培养细胞生长状态良好;用液氮冷冻法保存传代细胞,解冻后持续传代至第12代仍生长良好,第8代细胞冻存前和复苏后的活率分别为97.0% 和94.3%,无显著差异(P>0.05);分离纯化的胎牛成纤维细胞的生长曲线都正常;成功地建立了牛胎儿成纤维细胞系.该细胞可经多次传代培养和冷冻保存. 相似文献
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将ＰＫ－１５和ＳＴ细胞通过普通冰箱冷藏室（４℃）１５分钟；普通冰箱冷冻室（－４℃）５分钟，低落曙冰箱（－２０℃）２０分钟；气态液氮３０分钟后沉入液氮中，经一段时间后复苏，冻存细胞状态良好。全部冻存过程在７０分钟内完成，比常规冻存方法节省时间，简便易行。 相似文献
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成年小鼠生精小管及睾丸的冷冻保存 总被引：1，自引：0，他引：1
采用含不同浓度抗冻剂二甲基亚砜(DMSO)、乙二醇(EG)、丙二醇(PG)及丙三醇(G)的DMEM培养基作为冻存液,对成年小鼠生精小管及完整睾丸进行慢速冷冻,液氮保存,37 ℃水浴复苏,并测定细胞复苏率。结果表明,成年小鼠生精小管在50 mL/L、100 mL/L 及150 mL/L DMSO冻存液中的细胞复苏率分别为92.6%、93.4%及69.4%,在50 mL/L、100 mL/L及150 mL/L PG 冻存液中的细胞复苏率分别为94.2%,93.3%及66. 9%,在50 mL/L、100 mL/L 及150mL/L EG 冻存液中的细胞复苏率分别为87.2%、91. 0%及62. 6%,在50 mL/L、100mL/L及150 mL/L G冻存液中的细胞复苏率分别为90.0%、90.5%及67.1%。各种抗冻剂的最高细胞复苏率之间差异不显著(P> 0. 05 )。成鼠完整睾丸在含100 mL/LDMSO、PG、EG或G的冻存液中的细胞复苏率分别为56.0%、50.0%、50.2%及50.2%。结果显示,DMSO、PG、EG 及G 均适宜用作成年小鼠生精小管的抗冻剂,最佳使用浓度均为50 mL/L~100 mL/L。完整睾丸冷冻后的细胞复苏率低于60%,仍需进一步研究。 相似文献
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荷斯坦奶牛耳组织成纤维细胞分离培养及冷冻保存方法研究 总被引：5，自引：0，他引：5
试验对荷斯坦奶牛耳组织成纤维细胞的分离、体外培养及5种冷冻保存方法进行了研究。结果表明:用DMEM/F12 20%胎牛血清 100IU/mL双抗的完全培养液进行组织块培养,能获得良好的荷斯坦奶牛耳组织成纤维细胞原代培养物;成纤维细胞混合培养物经TrypsinEDTA(0.25%Trypsin,1mmol/LEDTA.4Na)消化所收集到的细胞主要为成纤维细胞,经2~3代传代,可得到纯化的荷斯坦奶牛耳组织成纤维细胞。纯化培养的成纤维细胞在冷冻保护剂和血清成分相同的条件下,选用5种不同的冷冻保存方法进行冷冻保存,其中使用70%细胞悬液 20%胎牛血清 10%DMSO的冷冻保存悬液,先在4℃预冷平衡0.5h,接着在液氮罐口的气态氮中悬挂4h,然后沉入液氮的方法冻存的细胞,解冻后,经台盼蓝染色后进行细胞活力分析,活细胞率为86.68%;培养48h后细胞贴壁率为86.40%,明显高于其他几种方法。 相似文献
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《黑龙江畜牧兽医》2017,(19)
为了研究敖汉细毛羊毛囊细胞的培养方法,建立敖汉细毛羊毛囊细胞系,保存毛囊细胞便于后续细胞水平毛囊相关基因的深入研究,试验采用胰蛋白酶消化法对初生40日龄以内的敖汉细毛羊皮肤组织进行原代培养,通过原代培养、细胞传代、冷冻保存、复苏等方式成功分离并纯化出敖汉细毛羊毛囊细胞,然后对细胞进行了形态学观察,冻存、复苏活力检测,生长动力学分析,核型分析和微生物污染检测等分析。结果表明:原代毛囊细胞经胰蛋白酶消化及差速离心分离培养出毛囊细胞,冻存前细胞活力为94.19%,冻存1个月复苏后细胞活力为91.96%。细胞生长呈S型,经历潜伏期、指数生长期和平台期三个阶段。细胞的细菌、真菌、病毒和支原体检测均为阴性。试验成功分离了敖汉细毛羊毛囊细胞并建立了敖汉细毛羊毛囊细胞系。 相似文献
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旨在筛选适合生物反应器悬浮培养BHK21细胞的无血清培养基,并利用该技术培养伪狂犬病毒。通过筛选市售的无血清培养基,以细胞形态、细胞活率和增殖倍数作为驯化指标,对BHK21细胞进行无血清驯化;对使用10 L和40 L生物反应器无血清悬浮培养BHK21细胞的参数进行研究;同时利用筛选的无血清培养基和悬浮细胞进行伪狂犬病毒增殖测试。结果表明,市售培养基Ⅰ符合筛选要求,其培养的细胞形态比较均一,结团少,细胞生长2 d的增殖倍数为3.5倍,细胞活率在95%以上;生物反应器悬浮培养BHK21细胞的最适参数为转速80 r/min、pH值7.2、DO 60%;利用该工艺技术培养伪狂犬病毒,当接种细胞密度为6×106 cells/mL,接毒剂量为0.3%时,48 h收获的病毒液滴度可达109.5 TCID50/mL。该试验实现了伪狂犬病毒的无血清悬浮生产,为其生产工艺的优化提供了可能。 相似文献
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就细胞的冷冻密度和复苏温度对细胞活力的影响做了分析。取处于对数生长期的细胞以0．5×107～4．0×107／mL之间的4个细胞密度分别进行冷冻,2周之后复苏细胞,检验其复苏活力;又分别在37℃、38℃和39℃的水温复苏同一批细胞,复苏后检验细胞的活力。结果表明,随着冷冻密度的升高,复苏活力逐渐下降;在38℃水温复苏细胞的平均活力比在37℃和39℃水温复苏细胞的平均活力高,而且稳定。因此,细胞的冷冻密度和复苏活力之间存在显著负相关性,38℃的水温更适于复苏细胞。 相似文献
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Acosta TJ Yoshioka S Komiyama J Lee SH Grazul-Bilska AT Skarzynski DJ Okuda K 《The Journal of reproduction and development》2007,53(3):473-480
To establish a storage system for isolated bovine luteal endothelial cells (LECs), we investigated the basal and tumor necrosis factor (TNF) alpha-stimulated production of endothelin-1 (ET-1) and prostaglandin (PG) F2alpha in unfrozen and frozen-thawed LECs until passage 10. LECs were obtained from developing corpora lutea (CL; days 5-7 of the estrous cycle) using enzymatic digestion and magnetic beads coated with lectin BS-1. The LECs were frozen at -80 C or further cultured and/or passaged until passage 10 in DMEM/Ham's F-12 supplemented with 10% calf serum. The hormonal productions of unfrozen and frozen/thawed LECs were compared through passages 2-10. When both the unfrozen and frozen/thawed cells reached confluence, the culture medium was replaced with fresh medium containing 0.1% bovine serum albumin (BSA), and the cells were incubated with TNFalpha (50 ng/ml) for 12 h. The basal productions of ET-1 and PGF2alpha by the unfrozen and frozen/thawed LECs were similar at passage 2. The basal production of PGF2alpha by LECs was not altered by passage and storage at -80 C, whereas the basal production of ET-1 decreased from passage 2 and 3 to passage 4 in the unfrozen LECs and from passage 2 to passage 3 in the frozen/thawed LECs. However, production of ET-1 by the unfrozen and frozen/thawed LECs was similar between passages 4-10 and passages 3-10, respectively. Exposure of LECs to TNFalpha increased (P<0.05) ET-1 and PGF2alpha production by the unfrozen and frozen-thawed LECs in all passages examined. Thus, LECs obtained from developing CLs and stored until passage 10 can be used for study of the physiology of LECs in vitro. 相似文献
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BHK21 (clone 13S) cells of high (BHK-SH) and low (BHK-SL) passage number were infected with foot-and-mouth disease virus (FMDV) subtypes A24, A25 and C3. While the amount of virus specific RNA produced in BHK-SH cells was 25% of that in BHK-SL cells and the virion production was 27% (C3) to 53% (A24) lower, the synthesis of viral proteins was comparable, associated with an accumulation of procapsids in BHK-SH cells. The results suggest that changes in viral infection pattern with increasing BHK21 cell passage number should be considered in FMDV vaccine production. 相似文献
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Turkey meningo-encephalitis virus was adapted to BHK21 cell culture. Cytopathic effects were characterized by rounding and detachment of cells within 48 hours. Attenuation was achieved by 41 successive passages in BHK21 cell cultures. Turkeys and Japanese quail (Coturnix coturnix japonica), kept under laboratory conditions and inoculated with the attenuated virus, did not develop symptoms of turkey meningo-encephalitis but reacted by the production of haemagglutination inhibition antibody. They resisted intracerebral challenge with pathogenic strains of turkey meningo-encephalitis virus. 相似文献
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ER da Cunha CF Martins CG Silva HC Bessler SN Báo 《Reproduction in domestic animals》2014,49(5):806-812
The objective of this work was to study cellular types that did not participated in the gastrulation process, amniotic fluid cells (AFCs) and umbilical cord cells (UCCs), in conditions of long‐term culture and cryopreserved with different solutions. The AFCs and UCCs were used in a comparative study with ear fibroblast cells (EFCs) that were cultured in vitro until 20 cellular passages and cryopreserved in 10% dimethylsulphoxide (DMSO), 5% dimethyl formamide (DMF) and 7% glycerol (Gly) solutions. The cellular viability, ultrastructure, DNA fragmentation and chromosome stability were evaluated to determine the cellular type most resistant. In all cell types, it was possible to evaluate the AFCs until 15 passages and UCCs until 20 passages with different periods of cellular growth to reach the confluence phase. Solutions containing 10% DMSO ensured viability of 90.33 ± 5.58%, 90.56 ± 4.40% and 81.90 ± 3.31%, respectively for EFCs, AFCs and UCCs, being significantly more efficient and with less variation than other cryoprotectant solutions. The AFCs were more sensitive to cryopreservation and presented low viability rate at the passage 20 (17.2 ± 8.87%). There was no change in karyotype and nuclear fragmentation was low in all cellular passages studied. With the scanning electron analysis was possible the characterization of AFCs and UCCs in suspension. The three cellular types of cells presented different shapes and characteristics on the surface. The results demonstrate that bovine AFCs and UCCs can be isolated, cultured in vitro and cryopreserved in 10% DMSO, not causing damage to DNA and chromosomes. The UCCs were more resistant than AFCs in all aspects. 相似文献
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从动物耳皮肤组织采样 ,采用将组织块剪碎后直接贴附于培养瓶底部的方法进行原代培养 ,该方法使原代细胞出现率及可传代率均达到 10 0 %。根据上皮样细胞和成纤维样细胞贴壁紧实程度的不同 ,用 0 .0 5 %的胰蛋白酶-EDTA对其进行消化 ,可将两种不同类型的细胞进行分离和纯化。通过脂质体介导 ,以BLG -hINS(含乳球蛋白调控基因的人胰岛素原基因 )基因作为目的基因、GFP(绿色荧光蛋白 )基因作为标记基因共转染绵羊成纤维细胞 ,经G - 4 18筛选后 ,得到转染细胞。对转染的细胞分别用单细胞显微操作法和有限稀释法进行细胞克隆 ,两种方法均可得到克隆细胞。选形态正常、生长均匀的 5个细胞克隆进行PCR检测 ,结果 5个克隆均转有GFP基因 ,其中两个转有BLG -hINS基因。高代培养细胞、转染细胞和克隆细胞经核型分析后 ,染色体数目均为 2 7对 ,表明绵羊耳的成纤维细胞建立细胞株后 ,可以作为外源基因转染的有效供体细胞。 相似文献
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Comparison of Optisol-GS and neomycin-polymyxin B-gramicidin ophthalmic solution for corneal storage in the dog 总被引：1，自引：0，他引：1
The objective of the research was to compare the efficacy of Optisol-GS (OGS, Bausch & Lomb Surgical, Irvine, CA, USA) with triple antibiotic ophthalmic solution (neomycin-polymyxin B-gramicidin, NPG; Bausch & Lomb, Tampa, FL, USA) in preserving the viability of corneal endothelial cells. The study subjects were thirty young to middle-aged dogs with no gross corneal pathology that had been euthanized by pentobarbital overdose for reasons unrelated to this project. Corneal tissues were harvested, analyzed, and randomly assigned to treatment groups: one of two media (OGS or NPG), and one of five storage times (1, 7, 14, 21, or 35 days). Six corneas were stored in each medium for each time period. Corneal endothelial cell viability was evaluated pre- and poststorage by vital staining (trypan blue and alizarin red S), and endothelial cell morphology was evaluated with scanning electron microscopy. Storage in NPG caused significant loss (100%) of endothelial cells after all storage times. OGS storage maintained a high level of endothelial cell viability up to 21 days (98.9% ± 1.3% viability). A significant decrease in percentage viability was also found for OGS-stored corneas between 21 and 35 days, when endothelial cell viability decreased to 61.4% ± 45.9%. The conclusions are that NPG storage at −20 °C is a very poor choice of media for corneal tissue banking if graft clarity is the goal. Storage in Optisol-GS at 4 °C for up to 21 days resulted in significantly higher percentages of viable endothelial cells. Optisol-GS storage should facilitate corneal preservation for canine keratoplasty patients. 相似文献
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Evidence of Damage in Cryopreserved and Fresh Bovine Embryos Using the Tunel Technique 总被引：1，自引：0，他引：1
YC Márquez-Alvarado CS Galina B Castilla H León N Moreno-Mendoza 《Reproduction in domestic animals》2004,39(3):141-145
The objective of the present study was to evaluate the quality of bovine embryos cryopreserved in different years in Chiapas, Mexico. The embryos were obtained from a government institution (FIMEGEN) dedicated to promoting embryo transfer among dual-purpose cattle farmers. Forty-three embryos frozen in 1988, 1989, 2000 and 2002 were analysed with the Tunel technique to detect programmed cell death (apoptosis). Eleven fresh embryos were used as controls. Analysis of variance was used in embryos stored in the different years with averages tested using Tukey's test. Student's t-test was employed to compare fresh and frozen cells. Embryos with shorter storage time presented a lower number (p < 0.001) of Tunel-positive cells compared with embryos stored for longer time. On the contrary, when comparing the number of apoptotic cells between frozen and fresh embryos a higher number of positive cells (p < 0.05) were found in the former. The present results suggest that the cryopreservation per se caused damage that compromises the viability of the embryo. Another explanation for the lower pregnancy rate found in the tropics could be irreversible damage caused by poor storage technique in these large operations. 相似文献