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激光扫描共聚焦显微术在生物医学中的研究 总被引:1,自引:0,他引:1
激光扫描共聚焦显微技术的发展,为形态学、分子细胞生物学、神经科学、肿瘤医学、药理学、遗传学等领域的研究提供了新的先进研究方法和手段。本文对激光扫描共聚焦显微术在粘附细胞分选,动态荧光分析测定,显微细胞外科和光陷阱技术,荧光光漂白恢复技术以及三维图像重建功能等方面的研究进展进行了综述。 相似文献
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激光扫描共聚焦显微镜与普通光学显微镜相比,其分辨率高,同时具有可对样品进行非侵入性无损伤断层扫描,以及对样品形貌进行三维成建等特点,因此,可作为研究晶体生长强有利的工具。本文介绍了其在定量测量晶体的个数,重组三维图像以获得晶体生长的过程信息及测定晶体生长台阶动态变化等方面的应用。还对激光扫描共聚焦显微镜在晶体生长研究的其它方面应用前景作了展望。 相似文献
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目的:建立激光扫描共聚焦显微镜观察生物膜形成过程的方法,为进一步研究生物膜的形成机制奠定基础。方法:以临床分离金葡菌X428为研究对象,在盖玻片上形成生物膜,分别于接种后的4、8、12、16、24和48h取出玻片,采用免疫荧光技术标记多糖和细菌,激光扫描共聚焦显微镜(CLSM)观察生物膜形成情况。结果:取得了生物膜形成过程的不同时间点的CLSM图像,4h时细菌在盖玻片上粘附形成小菌落,8h和12h细菌聚集成簇,多糖基质产生并逐渐增多,至16h形成成熟生物膜结构;24h和48h生物膜已经播散,其结构变小。结论:应用免疫荧光技术和激光扫描共聚焦显微镜技术研究生物膜形成过程是一种简便可行的方法。 相似文献
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《中国细胞生物学学报》2017,(7)
激光扫描共聚焦显微镜的原理和使用是本科生细胞生物学实验教学中的重要内容。目前,在细胞生物学实验教学中常使用绿色新鲜的植物叶片作为实验材料,在激光扫描共聚焦显微镜下对叶绿体的自发荧光进行观察。叶绿体的自发荧光信号强而且范围广,使学生难以清晰地理解特异性的荧光信号。该文通过对转p35S::Naa10-GFP基因拟南芥幼苗的根尖进行活体染色[碘化丙啶(propidium iodide,PI)和4′,6-二脒基-2-苯基吲哚(4′,6-diamidino-2-phenylindole,DAPI)染色],在不同的激发光下,收集相应的荧光信号,通过计算机辅助成像,获得不同颜色叠加的特异荧光信号图像。该实验设计简单可行,获得的图像清晰且便于观察,能够使初学者直观并且深刻理解激光扫描共聚焦显微镜的原理和使用方法,适合在高校细胞生物学实验教学中推广,同时也为研究其他蛋白质亚细胞定位提供技术参考。 相似文献
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激光扫描共聚焦显微镜在医学研究中的应用 总被引:1,自引:0,他引:1
激光扫描共聚焦显微镜(Confocal laser scanning microscope,CLSM)具有高分辨率、高灵敏度、三维重建、动态分析等优点,使图像更为精确清晰和数字化。该仪器现已广泛应用于细胞生物学、生理学、病理学、遗传学和药理学等研究领域中。本文简述了激光扫描共聚焦显微镜的结构、工作原理并归纳了其在医学各领域研究中的应用。 相似文献
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共聚焦激光扫描显微镜以高空间分辨率、非介入无损伤性连续光学切片、实时动态观察等优越性,应用于生物医学众多领域中。本文主要论述共聚焦激光扫描显微镜在发育生物学中的应用。 相似文献
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Recent advances in the study of Kaposi's sarcoma-associated herpesvirus replication and pathogenesis
It has now been over twenty years since a novel herpesviral genome was identified in Kaposi's sarcoma biopsies. Since then, the cumulative research effort by molecular biologists, virologists, clinicians, and epidemiologists alike has led to the extensive characterization of this tumor virus, Kaposi's sarcoma-associated herpesvirus(KSHV; also known as human herpesvirus 8(HHV-8)), and its associated diseases. Here we review the current knowledge of KSHV biology and pathogenesis, with a particular emphasis on new and exciting advances in the field of epigenetics. We also discuss the development and practicality of various cell culture and animal model systems to study KSHV replication and pathogenesis. 相似文献
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RICHARD E. NORRIS 《Botanical journal of the Linnean Society. Linnean Society of London》1991,106(1):1-40
Comprises species occurring mostly in subtidal habitats in tropical, subtropical and warm-temperate areas of the world. An analysis of the type species, V. spiralis (Sonder) Lamouroux ex J. Agardh, a species from Australia, establishes basic characters for distinguishing species in the genus. These characters are (1) branching patterns of thalli, (2) flat blades that may be spiralled on their axis, (3) width of the blade, (4) primary or secondary derivation of sterile and fertile branchlets and (5) position of sterile and fertile branchlets on the thalli. Application of the latter two characters provides an important basic method for separation of species into three major groups. Osmundaria , a genus known only in southern Australia, was studied in relation to Vidalia , and its separation from the Vidalia assemblage is not accepted. Species of Vidalia therefore are transferred to the older genus name, Osmundaria. Two new species, Osmundaria papenfussii and Osmundaria oliveae are described from Natal. Confusion in the usage of the epithet, Vidalia fimbriala Brown ex Turner has been clarified, and Vidalia gregaria Falkenberg, described as an epiphyte on Osmundaria pro/ifera Lamouroux, is revealed to be young branches of the host, Osmundaria prolifera. 相似文献
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JOAN VALUÈS MONTSERRAT TORRELL NÚRIA GARCIA JACAS 《Botanical journal of the Linnean Society. Linnean Society of London》2001,137(4):399-407
Fifteen chromosome counts of six Artemisia taxa and one species of each of the genera Brachanthemum, Hippolytia, Kaschgaria, Lepidolopsis and Turaniphytum are reported from Kazakhstan. Three of them are new reports, two are not consistent with previous counts and the remainder are confirmations of very scarce (one to four) earlier records. All the populations studied have the same basic chromosome number, x = 9, with ploidy levels ranging from 2x to 6x. Some correlations between ploidy level, morphological characters and distribution are noted. 相似文献
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肝癌中HBV和HCV基因和抗原的分布及意义 总被引:1,自引:0,他引:1
采用原位分子杂交方法检测HCV
RNA及HBV X基因;采用免疫组织化学方法研究HCV核心抗原,非结构区C33c抗原及HBxAg在肝细胞肝癌中的定位及分布.结果表明(1)HCV
RNA、HBV X基因在肝细胞肝癌组织检出率分别为40%(55/136)和82%(112/136).HCV
RNA定位于癌细胞的胞浆内,阳性细胞呈散在、灶状及弥漫分布三种形式;HBV
X基因在肝癌细胞中的分布呈胞浆型、核型及核浆型,阳性细胞也呈上述三种分布形式;(2)HCV
C33c抗原、核心抗原在肝细胞肝癌中的阳性率为81%(133/164)及86%(141/164).C33c抗原定位于癌细胞及肝细胞的胞浆内;核心抗原既定位于癌细胞核中,又可定位于胞浆中.C33c抗原阳性细胞以灶状分布为主;而核心抗原阳性细 相似文献
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H.-R. GREGORIUS 《Biological journal of the Linnean Society. Linnean Society of London》1984,23(2-3):157-165
For a plant selection model with frequency-independent viabilities, fertilities and selfing rates, it is shown that apart from global fixation, for certain parameter combinations a protected polymorphism and facultative fixation (either allele may become fixed according to initial frequencies) may both occur. Facultative fixation requires different selling rates for the dominant and recessive type. Protection of the polymorphism requires resource allocation for male and female function. In this connection the problem of purely genetically caused population extinction is discussed.
For general frequency dependence and regular segregation, the chances for establishment of a completely recessive gene are compared to those of a completely dominant gene. It is proven that the process of establishment of the recessive gene, despite a fitness advantage, may be considerably endangered by drift effects if random mating prevails. The recessive gene may reach the same effectivity in establishment as a dominant gene, only if the recessive homozygote mates exclusively with its own type during the period of establishment. 相似文献
For general frequency dependence and regular segregation, the chances for establishment of a completely recessive gene are compared to those of a completely dominant gene. It is proven that the process of establishment of the recessive gene, despite a fitness advantage, may be considerably endangered by drift effects if random mating prevails. The recessive gene may reach the same effectivity in establishment as a dominant gene, only if the recessive homozygote mates exclusively with its own type during the period of establishment. 相似文献