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1.
东亚腹链蛇消化道嗜银细胞的分布及形态学观察   总被引:2,自引:1,他引:1  
王淼  甄靓靓  李淑兰  赵文阁 《四川动物》2007,26(2):278-280,I0004
应用Grimelius银染法研究了东亚腹链蛇(Amphiesma vibakari)消化道嗜银细胞的分布密度及形态。结果表明:在东亚腹链蛇的消化道中嗜银细胞分布广泛,见于全消化道。其分布密度曲线大致呈波浪形,其中胃部是嗜银细胞分布密度的高峰,胃幽门次之,回肠分布密度最低。嗜银细胞形态多样,主要以锥体形为主,其次还有圆形、椭圆形。广泛分布于上皮细胞基部、上皮细胞之间、腺泡上皮细胞之间。结论:东亚腹链蛇消化道嗜银细胞分布型的形成与各部位消化功能有关;根据其形态,我们认为东亚腹链蛇消化道内嗜银细胞具有内分泌、外分泌、旁分泌3种功能。  相似文献   

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目的 对克氏原螯虾(Procambarus clarkii)消化道的嗜银细胞及5种内分泌细胞进行鉴别与定位。方法应用整块组织Grimelius银染法和过氧化物酶标记的链霉亲和素(SP法)免疫组织化学技术结合生物统计学分析。结果嗜银细胞在克氏原螫虾消化道除幽门胃外的各段均有分布,位于消化道上皮细胞间及结缔组织中。五羟色胺(5-HT)细胞在除幽门胃外的消化道各段均有分布。生长抑素(SS)细胞仅在食道和后肠中有分布。胃泌素(Gas)细胞分布于除幽门胃和中肠外的消化道各段。胰高血糖素(Glu)细胞在除幽门胃外的整个消化道均有分布,在食道和贲门胃中最多。胰多肽(PP)细胞仅在肠道中有较多分布。结论克氏原螫虾消化道中存在多种内分泌细胞,它们的分布情况与其它甲壳动物存在一定的共性,然而也有其一定的特异性。  相似文献   

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采用ABC免疫组织化学方法对东方蝾螈Cynops orientalis消化道内5-羟色胺免疫活性内分泌细胞的分布及形态进行观察.结果显示,5-羟色胺(5-HT)细胞从食管到直肠各段均有分布,其中十二指肠的分布密度最高,空肠次之,幽门和直肠部最低.5-HT细胞形态多样呈圆形、锥体形和梭形等,根据其形态认为东方蝾螈消化道5-HT免疫活性细胞具有内分泌、外分泌两种功能.  相似文献   

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乌龟胃肠胰系统内分泌细胞的免疫组织化学研究   总被引:15,自引:0,他引:15       下载免费PDF全文
应用过氧化物酶标记的链霉卵白素(Streptavidin peroxidase,简称S-P法)免疫组织化学技术,使用六种特异性胃肠激素抗血清对乌龟胃肠胰系统内分泌细胞的种类、定位、分布密度及形态进行了研究。在乌龟胰腺中检测出5-羟色胺、生长抑素、胰高糖素和胰多肽等4种内分泌细胞,生长抑素、胰高糖素细胞多成簇大量分布于胰岛中;5-羟色胺、胰多肽细胞多散在少量分布于胰腺腺泡之间。在乌龟消化道中共检测出5-羟色胺、生长抑素、胃泌素、胰高糖素和P物质等5种内分泌细胞:5-羟色胺细胞在消化道各段均有分布,以十二指肠处分布密度最高(30.7±4.2),空肠其次,回肠、直肠处最低(12.0±1.0/11.2±3.0);生长抑素细胞仅分布于食道和胃中各段;胃泌素细胞分布于胃幽门部和十二指肠处;胰高糖素细胞分布于胃体至空肠段,以胃幽门部分布密度较高(11.3±1.1);P物质细胞仅布于胃幽门部;消化道各段均未检出胰多肽细胞。与其他爬行动物比较,乌龟胃肠胰系统内分泌细胞的分布既存在着一定共同点,又显示了较大的种间差异。  相似文献   

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王海梅  陈霞 《动物学杂志》2020,55(2):222-228
为了研究循环饥饿投喂对大鼠(Rattus norvegicus)消化道内嗜银细胞的分布密度及形态功能的影响,本实验采用Grimelius银染法观察和测定循环饥饿投喂(饥饿1 d,投喂1 d,周期为14 d)期间大鼠消化道嗜银细胞形态功能及密度分布。结果表明,实验组(即循环饥饿投喂组)和对照组(正常喂食组)大鼠消化道嗜银细胞除食管外均有分布,形态上对照组嗜银细胞以椭圆形和锥体形为主,实验组嗜银细胞则主要以锥体形为主;两组大鼠消化道嗜银细胞的分布密度高峰都位于胃,密度低谷对照组位于空肠、盲肠、回肠和直肠,实验组位于空肠到直肠各段;实验组大鼠消化道嗜银细胞分布密度在贲门和幽门部极显著低于对照组(P 0.01),结肠显著低于对照组(P 0.05),说明循环饥饿投喂会明显改变消化道嗜银细胞的形态并降低细胞数量,这可能与内分泌细胞的功能改变有关。  相似文献   

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为了揭示凹耳蛙(Odorrana tormota)消化道的基本特征,运用石蜡切片法和龙桂开银浸法对凹耳蛙消化道组织学结构及嗜银细胞的形态与分布密度进行了观察。结果显示:①凹耳蛙的胃壁具明显的纵行皱襞和胃小凹,胃腺发达,小肠可分为十二指肠和回肠,杯状细胞分散在十二指肠上皮细胞之间,十二指肠中未见十二指肠腺分布。②凹耳蛙嗜银细胞见于消化道全长,呈毛笔头样、锥体形、梭形、椭圆形和长条形等;幽门腺上皮和十二指肠绒毛上皮中的嗜银细胞具指向腺泡腔或肠腔的突起,提示其可能具有腔分泌的功能。嗜银细胞的分布密度胃幽门部最高,十二指肠和胃体其次,食道最低。据此认为胃既是凹耳蛙的主要消化器官,也是消化道中主要的内分泌器官;十二指肠是凹耳蛙消化道中的主要吸收部位,同时也具有内分泌功能;消化道嗜银细胞具有内分泌的功能,还可能具有腔分泌的功能。  相似文献   

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为研究两栖类在冬眠期及其前后消化道嗜银细胞是否参与冬眠期的消化调节,本文以牛蛙(Rana catesbeiana)为实验对象,采用Grimelius银染法,对冬眠期前(n = 10)、冬眠期(n = 10)和冬眠期后(n = 10)牛蛙消化道嗜银细胞的形态及密度进行比较研究。结果表明,牛蛙消化道各部位均有嗜银细胞分布;牛蛙消化道嗜银细胞形态在冬眠期、冬眠期前及冬眠期后无差异,均为锥体型、梭型和椭圆型;牛蛙消化道各部位具有外分泌功能的锥体型和梭形嗜银细胞密度在3个时期均显著高于具有内分泌功能的椭圆型嗜银细胞密度(P < 0.01);3个时期牛蛙消化道嗜银细胞分布密度高峰均位于空肠处,但低谷有所不同,冬眠期前和冬眠期后牛蛙消化道嗜银细胞的分布密度低谷位于食管,而冬眠期其分布密度低谷位于贲门;3个时期相比,冬眠期前和冬眠期幽门处分布密度差异不显著(P > 0.05),其余部位均有差异,且食管、胃、十二指肠、空肠、回肠和直肠中嗜银细胞分布密度在冬眠期显著高于冬眠期前和冬眠期后(P < 0.05);冬眠期前和冬眠期后消化道嗜银细胞分布密度呈倒“U”型趋势,冬眠期分布密度呈现“~”型趋势。结合相关研究,推测牛蛙嗜银细胞分布密度的改变可能与机体适应不同生理状态及消化功能的调节有关。  相似文献   

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姚伟红  李淑兰 《四川动物》2008,27(2):280-283
应用Grimelius银染法观察了褐家鼠Arattus norvegicus消化道嗜银细胞的分布密度及形态.结果 显示,在褐家鼠的消化道除食管未见嗜银细胞外,其它部位均有嗜银细胞的分布,其分布密度为胃贲门部最高,回肠部最低.嗜银细胞多分布于消化道粘膜上皮细胞之间或腺泡上皮之间,有时可见于上皮基部和固有膜内.嗜银细胞形态多样,主要以锥体形为主,其次还有圆形、梭形和椭圆形.根据其嗜银细胞形态,认为褐家鼠消化道内嗜银细胞具有内、外分泌、旁分泌3种功能.  相似文献   

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应用Grimelius银染法对白条草蜥消化道嗜银细胞进行了染色和切片观察.结果 表明:在白条草蜥的消化道中嗜银细胞分布广泛,见于其全长.其嗜银细胞形态多样,主要有锥体形、椭圆形等;其嗜银细胞分布密度于胃幽门最高,胃体次之,十二指肠最低.其消化道嗜银细胞分布型的形成与生活环境和取食方式等有关;根据其形态,嗜银细胞具有内、外分泌两种功能.  相似文献   

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中华稻蝗消化道内分泌细胞的鉴别与定位   总被引:1,自引:0,他引:1  
采用整块组织Grimelius银染法和过氧化物酶标记的链霉亲和素免疫组织化学技术,结合生物统计学分析,对中华稻蝗Oxya chinensis消化道内分泌细胞进行鉴别与定位。结果表明:嗜银细胞分布于中华稻蝗的胃盲囊、中肠和后肠各段,以中肠和直肠中最多(P<0.05), 前肠中未见分布。免疫组织化学法检测出了五羟色胺(5-hydroxytryptamine, 5-HT)、 胃泌素(gastrin, Gas)、 胰高血糖素(glucagon, Glu)和胰多肽(pancreatic polypeptide, PP)细胞, 未检出生长抑素(somatostatin, SS)细胞。免疫阳性细胞分布于中肠和后肠中, 前肠中未见分布。5-HT细胞和Gas细胞均主要分布于胃盲囊、中肠及直肠中,且均以直肠中最多(P<0.05)。Glu细胞在胃盲囊及整个中、后肠均有分布, 在中肠和直肠中最多(P<0.05)。PP细胞主要分布于中肠、回肠和直肠中,中肠中分布密度最大(P<0.05)。本研究显示中华稻蝗消化道中存在多种内分泌细胞,它们的分布情况与其他节肢动物相比存在一定的共性,也有其一定的特异性,可能与中华稻蝗特定的消化道结构和消化生理功能有关。  相似文献   

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Summary By light and electron microscopy investigation of the human gastric mucosa five types of ultrastructurally different endocrine cells have been detected: 5-hydroxytryptamine storing enterochromaffin (EC) cells, gastrin storing G cells, and functionally undefined ECL, D and D1 cells. By direct application of Masson's argentaffin reaction as well as of Sevier-Munger's and Grimelius' argyrophil method to electron microscopy specimens, selective deposition of silver grains upon the endocrine granules of such cells was obtained. In particular, only EC cell granules reacted to the argentaffin method, granules of both EC and ECL cells heavily reacted to Sevier-Munger's technique, granules of EC, ECL, G and D1 cells reacted to Grimelius' technique, while D cell granules failed to react either to argentaffin or argyrophil methods. By the application of the same silver methods to paraffin sections as well as by other selective staining methods for endocrine granules (5-hydroxytryptamine techniques, lead-haematoxylin, HCl-basic dye method), at least four of the above cell types were also identified under light microscope. This opens the way for extensive studies of such cells in conventional histologie specimens.This investigation was supported in part by grant N.70.01022.04 from the Italian Consiglio Nazionale delle Ricerche.  相似文献   

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Summary The following histological methods, previously proved to be useful in selective light microscopic detection of endocrine cells, were applied to the cat gastrointestinal mucosa: for the identification of biogenic amines, diazonium, ammoniacal silver and xanthydrol methods; for granules identification, methyl green-red acid dyes, toluidine blue, HCl-basic dye, lead-haematoxylin, phosphotungstic haematein and argyrophil methods. Results were compared with those of an extensive electron microscopic investigation.Five types of endocrine cells were identified in the gastric mucosa. Three types were found in the pyloric mucosa: the previously described 5-hydroxytryptamine-producing enterochromaffin cell, the gastrin producing G cell and a cell with an unknown function, labelled in this paper the X cell. Four types were found in the fundic mucosa: enterochromaffin cells (rarely observed), enterochromaffin-like cells secreting a 5-hydroxyindole but showing some ultrastructural and staining differences from true enterochromaffin cells (numerously present), A-like cells (few), resembling A cells of the pancreatic islets, and X cells, resembling those in the pyloric mucosa.In the intestinal mucosa, at least three endocrine cell types were distinguished in its duodenal part: enterochromaffin cells and two types of polypeptide-producing cells — some with smaller granules (S cells) and others with larger granules (L cells). Only two types were found in the mucosa of terminal ileum: enterochromaffin cells and numerously-occurring cells with large granules resembling in part duodenal L cells. The possibility of a relationship between S and L cells and the production respectively of the intestinal hormones secretin and cholecystokinin-pancreozymin was discussed.This investigation was supported by a grant N. 115/1139/0/4715 of the Italian Consiglio Nazionale delle Ricerche.  相似文献   

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刘超  甄靓靓  李淑兰  赵文阁 《四川动物》2007,26(2):274-277,I0004
应用5-HT抗血清,以ABC(avidin-biotin-peroxidase complex)免疫组织化学方法,探究中华花龟消化道内5-HT免疫反应阳性内分泌细胞的分布及形态。结果表明,5-HT阳性细胞从食管到直肠的消化道各段均有分布,以十二指肠部位分布密度为最高,胃幽门部次之,食管部最低;5-HT阳性细胞广泛分布于上皮细胞之间、上皮基部、腺泡上皮细胞之间、腺泡之间以及固有膜内,形态多样呈圆形、椭圆形、锥体形、梭形等,以锥体形为主。认为中华花龟消化道5-HT阳性细胞具有内、外分泌两种作用途径,并且5-HT阳性细胞的密度分布可能与其食性、生活环境等有关。  相似文献   

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应用5-羟色胺特异性抗血清,对眼镜蛇和乌梢蛇消化道含5-HT的内分泌细胞进行了免疫组织化学定位和比较。5-HT细胞的形态在两种蛇中大致相同,消化道各部位都有呈圆形和长梭形(具胞突)的阳性细胞。食道和胃以圆形细胞为主,肠道段则以长梭形细胞为主。眼镜蛇5-HT细胞以十二指肠密度为最高,食道最低;乌梢蛇以幽门部密度为最高,直肠最低。肠道段两者分布特点相同,从十二指肠至直肠分布密度渐疏。本文还对两种蛇5-HT细胞分布型的原因、形态和功能相适应的特点进行了讨论。  相似文献   

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The ultrastructure of endocrine cells in the midgut of the adult mosquito, Aedes aegypti, resembled that of endocrine cells in the vertebrate gastro-intestinal tract. Midgut endocrine cells, positioned basally in the epithelium as single cells, were cone-shaped and smaller than the columnar digestive cells. The most distinctive characteristic of endocrine cells was numerous round secretory granules along the lateral and basal plasma membranes where contents of the granules were released by exocytosis. Secretory granules in each individual cell were exclusively of one type, either solid or 'haloed', and for all cells observed, the range in granule diameter was 60-120 nm. The cytoplasm varied in density from clear to dark. Lamellar bodies were prominent in the apical and lateral cellular regions and did not exhibit acid phosphatase activity. The basal plasma membrane was smooth adjacent to the basal lamina, whereas in digestive cells the membrane formed a labyrinth. Some endocrine cells reached the midgut lumen and were capped by microvilli; a system of vesicles and tubules extended from beneath the microvilli to the cell body. An estimated 500 endocrine cells were distributed in both the thoracic and abdominal regions of the adult midgut. In one midgut, we classified a sample of endocrine cells according to cytoplasmic density and granule type and size; endocrine cells with certain types of granules had specific distributions within the midgut.  相似文献   

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蛇岛蝮蛇消化道5-羟色胺细胞的形态与分布   总被引:2,自引:0,他引:2  
采用ABC(avidin-biotin-peroxidase complex)免疫组织化学方法,观察蛇岛蝮蛇(Gloydius shedaoensis)消化道内5-羟色胺(5-HT)免疫阳性内分泌细胞的分布及形态.结果显示,5-羟色胺细胞从食管到直肠各段均有分布.细胞分布密度呈波浪式,其中胃贲门部分布密度最高(7.15±2.38),直肠部次之(4.55±3.14),食管部最低(1.2±0.71).5-HT阳性细胞广泛分布于消化道上皮细胞之间、上皮基部、腺泡上皮细胞之间以及固有膜内.形态多样,呈圆形、锥体形、梭形等.分析认为蛇岛蝮蛇消化道5-HT细胞具有内、外分泌两种作用途径,并且其密度分布可能与其食性、生存环境有关.  相似文献   

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