| 100023 北京市2345信箱 | 世界华人消化杂志 2000年4月15日;8(4):400-402 |
| Email: wcjd@public.bta.net.cn | 世界华人消化杂志 ISSN 1009-3079 CN 14-1260/R |
| http:// www.wjgnet.com | 版权归世界胃肠病学杂志社 |
⊙研究原著⊙
胃癌和癌前病变中树突状细胞的免疫组化研究
罗治彬
罗元辉
鲁
荣
晋华源
张朋彬
徐采朴
中国人民解放军第三军医大学西南医院消化科
重庆市 400038
罗治彬,男,1968-06-13生,重庆市垫江县人,汉族.
1992年临床医学本科毕业,1997年医学硕士,医师,主要从事消化系疾病的免疫病理及其防治研究,发表论文16篇.
项目负责人
罗治彬,400038,中国人民解放军第三军医大学西南医院消化科.
Department of Gastroenterology, Southwest Hospital, Third Military Medical
University, Chongqing 400038, China
Correspondence to Dr.
Zhi-Bin Luo, Department of Gastroenterology, Southwest Hospital, Third Military Medical
University,
Chongqing 400038, China
Tel. 0086-23-68754000 Ext.73094
Email. zhibinluo@usa.net
收稿日期 1999-11-25
接收日期
2000-01-12
Immunohistochemical study on dendritic cells in
gastric mucosa of patients with gastric cancer and precancerous lesions
Zhi-Bin Luo, Yuan-Hui Luo, Rong Lu, Hua-Yuan Jin,
Peng-Bin Zhang and Cai-Pu Xu
Abstract
AIM To
investigate the effect of dendritic cell (DC) on gastric mucosal immunity from expressions of S100, HLA-DR,
CD4 and CD8 in human gastric mucosa.
METHODS A
total of 236 patients had gastric cancer (GC,n=143), chronic atrophic gastritis (CAG,n=41),
dysplasia (Dys,n=15) and intestinal metaplasia (IM, n=27),
and normal control group (n=10). All subjects were diagnosed with endoscopy and
histopathology. The number, mean area and absorbance of S100+, HLA-DR+,
CD4+ and CD8+ cells were detected by HE
and immunohistochemical (SP method) staining and image analysis.
RESULTS The
number of S100+ (0.6μm2±0.2μm2) and HLA-DR+ (0.9μm2±0.2μm2) cells in gastric mucosa was
significantly higher in patients with GC, CAG, Dys and IM than in normal control
group (P<0.05). The number of CD4+ cells (0.7μm2±0.2μm2) were
markedly lower in GC than in normal
control (2.3μm2±0.4μm2)
and its mean absorbance (P<0.01).
The number of CD8+ cells (1.1μm2±0.3μm2) and its mean area and absorbance had
no abvious difference between GC and normal (P>0.05),
but the number of CD8+
cells was higher in CAG, Dys and IM than in normal
(P<0.05). The ratio of CD4 to CD8
was lower in GC (0.65), CAG (0.81), IM (0.59) and Dys (0.56) than in normal (1.94), P<0.05.
CONCLUSION The
number of DC in gastric mucosa of precancerous lesions is increased and its function is enhanced,
but they are positively correlated to the degree of differentiation in gastric
cancer. Inhibited function of DC in gastric mucosa is one of important factors
making immunity of gastric mucosa decrease and precancerous lesions change into
cancer.
Subject headings
dendritic cell; gastric mucosal immunity; stomach neoplasms; precancerous lesions
Luo ZB, Luo YH, Lu R, Jin HY, Zhang PB, Xu CP.
Immunohistochemical study on dendritic cells in gastric mucosa of patients with
gastric cancer and precancerous lesions. Shijie Huaren Xiaohua Zazhi,
2000;8(4):400-402
摘要
目的
通过研究胃粘膜中S100+,HLA-DR+,CD4+和CD8+产物的表达情况,以了解DC细胞在胃粘膜免疫中的作用.
方法
胃癌(143例)、慢性萎缩性胃炎(41例)、不典型增生(15例)、肠上皮化生(27例)和正常对照组(10例)共236例,都经内镜和病理诊断明确. 采用HE染色、SP免疫酶标抗体组化染色法与图象分析技术相结合,观察胃粘膜中S-100+,HLA-DR+,CD4+和CD8+细胞数量、平均面积和平均吸光度的变化.
结果
胃癌患者胃粘膜中S-100+(0.6±0.2)μm2,
HLA-DR+ (0.9±0.2)细胞数量明显多于正常胃粘膜(P<0.05);CD4+细胞(0.7±0.2)μm2及其平均吸光度显著减少(P<0.01);CD8+细胞数量(1.1±0.3)μm2、面积及其平均吸光度约有减少,但与正常组比较无显著差异(P>0.05);CD4+/CD8+比值为0.7,显著低于正常胃粘膜(P<0.01).
慢性萎缩性胃炎、肠上皮化生和不典型增生胃粘膜中S-100+分别为(1.8±0.3)μm2,
(2.2±0.6)μm2和(2.2±0.5)μm2,HLA-DR+分别为(2.4±0.6)μm2,
(3.0±0.8)μm2和(2.8±0.6)μm2细胞数量显著增加(P<0.01);CD8+细胞数量分别为(1.8±0.2)μm2,
(1.9±0.2)μm2,
(1.8±0.2)μm2均明显高于正常胃粘膜(P<0.05);CD4+/CD8+比值分别为0.8,
0.6, 0.6,均显著低于正常胃粘膜(P<0.05).
结论
癌前状态胃粘膜中DC数量显著增多,功能增强;而胃癌患者胃粘膜中DC数量随分化程度的降低而减少. 胃粘膜中DC细胞功能的抑制是导致胃粘膜免疫功能低下和癌前状态发生癌变的重要原因之一.
主题词 DC细胞;胃粘膜免疫;胃肿瘤;癌前病变
罗治彬,罗元辉,鲁荣,晋华源,张朋彬,徐采朴. 胃癌和癌前病变中树突状细胞的免疫组化研究. 世界华人消化杂志,2000;8(4):400-402
0 引言
树突状细胞(dendritic cells,DC)是启动机体免疫应答的一组形态和功能特异的抗原提呈细胞(antigen presenting cell,APC).
近来国外学者开始研究DC和肿瘤发生发展的关系,但对在胃粘膜尤其是在癌前状态(precancerous condition)中DC的研究甚少.
我们采用HE染色、SP免疫酶标抗体组化染色法与图象分析技术相结合,观察胃癌、胃癌前状态和正常胃粘膜的免疫状况,探讨胃癌发生过程中胃粘膜免疫功能的变化及DC在其中所起的作用.
1 材料和方法
1.1 材料
西南医院消化内科1998年经内镜和病理诊断明确病变者共236例,包括胃癌组(gastric
cancer, GC)143例(中分化腺癌74例,低分化腺癌32例,未分化癌37例),慢性萎缩性胃炎(chronic atrophy gastritis, CAG)41例(中度萎缩性胃炎29例,重度萎缩性胃炎12例),不典型增生(dysplasia, Dys)15例,肠上皮化生(intestinal
metaplasia, IM)27例和正常对照组(normal, Nor)10例.
1.2 方法
HE染色:全部切片重新评价,确认原诊断无误. 4μm连续切片,分别作HE染色.
免疫组化染色用SP法,抗人S100, HLA-DR, CD4, CD8 mAb和SP试剂盒为DAKO公司产品,用PBS替代一抗作空白对照. 结果判定:S100阳性染色位于细胞质内,HLA-DR,CD4,
CD8阳性染色位于细胞膜上,阳性结果为棕黄色.
染色结果用MD-20型图象分析仪(德国徕卡)测定粘膜层中阳性细胞数量(/μm2)、平均吸光度和平均面积(μm2).
统计学处理
采用第三军医大学数学教研室编制的数理统计程序包作方差分析,结果以均数及标准差(x±s)表示,P<0.05为相差显著,P<0.01为相差极为显著.
2 结果
2.1 DC细胞质呈S100+阳性反应,正常胃粘膜中仅见少量散在分布于间质中. CAG,IM,Dys胃粘膜中DC均成簇状分布,阳性细胞数分别为(1.8±0.3)μm2, (2.2±0.6)μm2和(2.2±0.5)μm2,显著多于正常胃粘膜(0.2±0.1)μm2, P<0.01),其平均面积明显大于正常组(P<0.05).
胃癌组织内有较多DC散在分布,数量(0.6±0.2)μm2明显多于正常组(P<0.05),但随着分化程度的降低而有逐渐减少的趋势.
各组S100阳性细胞计数、平均面积和平均吸光度(表1).
HLA-DR+细胞分布、图象分析及统计结果与S100+细胞类似(表2).
表1 各组胃粘膜S-100+阳性细胞计数、平均面积和平均吸光度变化(x±s)
| 组别 | n | number/μm2 | Area/μm-2 | Absorbance△ |
| Nor | 10 | 0.2±0.1 | 45.6±9.0 | 1.2±0.2 |
| CAG | 41 | 1.8±0.3b | 67.6±11.4a | 1.9±0.2a |
| IM | 27 | 2.2±0.6b | 68.5±10.5a | 1.7±0.2a |
| Dys | 15 | 2.2±0.5b | 67.5±15.2a | 1.6±0.2a |
| GC | 143 | 0.6±0.2a | 48.2±9.6 | 0.9±0.1a |
aP<0.05, bP<0.01,
vs Nor.△:A(Absorbance)=IOD÷Area
表2 各组胃粘膜HLA-DR+阳性细胞计数、平均面积和平均吸光度变化(x±s)
| 组别 | n | number/μm2 | Area/μm-2 | Absorbance△ |
| Nor | 10 | 0.5±0.1 | 45.7±15.8 | 1.2±0.1 |
| CAG | 41 | 2.4±0.6b | 66.4±10.6a | 1.5±0.1 |
| IM | 27 | 3.0±0.8b | 67.9±12.9a | 1.7±0.1a |
| Dys | 15 | 2.8±0.6b | 64.8±15.1a | 1.4±0.2 |
| GC | 143 | 0.9±0.2a | 40.1±17.4 | 1.0±0.1a |
aP<0.05, bP<0.01,
vs Nor.
2.2 CD4+细胞散在分布于胃粘膜固有层中,阳性产物主要呈现在细胞膜上. 正常组CD4+细胞数为(2.3±0.4)μm2,
CAG,IM,Dys各组细胞数量分别为(1.4±0.2)μm2,(1.1±0.2)μm2,(1.0±0.1)μm2,均明显低于正常组(P<0.05);而胃癌组细胞计数(0.7±0.2)μm2与平均吸光度显著低于正常组(P<0.01,表3).
表3 各组胃粘膜CD4+阳性细胞计数、平均面积和平均吸光度变化(x±s)
| 组别 | n | number/μ |