AIM: To evaluate the relation of cluster of differentiation 44 (CD44) expression with clinicopathological features of gastric adenocarcinoma, and also its effect on prognosis with an emphasis on the differences betwee...AIM: To evaluate the relation of cluster of differentiation 44 (CD44) expression with clinicopathological features of gastric adenocarcinoma, and also its effect on prognosis with an emphasis on the differences between intestinal and diffuse types. METHODS: From 2000 to 2006, 100 patients with gastric adenocarcinoma, who had undergone total or subtotal gastrectomy without any prior treatment, were studied. Haematoxylin & eosin (HE) staining was used for histological evaluation, including the type (Lauren's classifi cation) and grading of the tumor. The expression of CD44 in the gastric adenocarcinoma mucosa and the adjacent mucosa were determined by immunohistochemistry. The survival analysis was obtained using the Kaplan-Meier test. RESULTS: Of 100 patients, 74 (74%) patients were male. The tumors were categorized as intestinal type (78%) or diffuse type (22%). Sixty-five percent of patients were CD44-positive. CD44 expression was not detected in normal gastric mucosa. Rather, CD44 was more commonly expressed in the intestinal subtype (P = 0.002). A signifi cant relation was seen between the grade of tumor and the expression of CD44 (P = 0.014). The survival analysis showed a poor prognosis of patients with CD44-positive tumors (P = 0.008); and this was more prominent in the intestinal (P = 0.001) rather than diffuse type. CONCLUSION: Cell adhesion molecule CD44 is highly expressed in gastric adenocarcinoma. CD44 expression is correlated with a poor prognosis in patients with the intestinal type of gastric adenocarcinoma. CD44 can, therefore, be utilized as a prognostic marker for this group of patients.展开更多
AIM: To reveal the correlation between the functional differentiation phenotypes of gastric carcinoma cells and the invasion and metastasis by a new way of cell-function classification.METHODS:Surgically resected spec...AIM: To reveal the correlation between the functional differentiation phenotypes of gastric carcinoma cells and the invasion and metastasis by a new way of cell-function classification.METHODS:Surgically resected specimens of 361 gastric carcinomas(GC) were investigated with enzyme-, mucin-, and tumor-related marker immunohistochemistry. According to the direction of cell-function differentiation, stomach carcinomas were divided into five functionally differentiated types. RESULTS: (1) Absorptive function differentiation type (AFDT): there were 82 (22.7%) patients including 76 (92.7%) aged 45 years. Sixty-nine (84.1%) cases belonged to the intestinal type. Thirty-eight (46.3%) expressed CD44v6 and 9 (13.6%) of 66 male patients developed liver metastasis.The 5-year survival rate of patients in this group (58.5%) was higher than those with the other types (P【0.01). (2) Mucin secreting function differentiation type (MSFDT): 54 (15%) cases. Fifty-three (98.1%) tumors had penetrated the serosa, 12 (22.2%) expressed ER and 22 (40.7%) expressed CD44v6. The postoperative 5-year survival rate was 28.6%. (3) Absorptive and mucin-producing function differentiation type (AMPFDT): there were 180 (49.9%) cases, including 31 (17.2%) aged younger than 45 years. The tumor was more common in women (62, 34.4%,) and expressed more frequently estrogen receptors (ER) (129, 81.7%) than other types (P【0.01). Ovary metastasis was found in 12 (19.4%) out of 62 female subjects. The patients with this type GC had the lowest 5-year survival rate (24.7%) among all types. (4) Specific function differentiation type (SFDT): 13 (3.6%) cases. Nine (69.2%) tumors of this type derived from APUD system, the other 4 (30.7%) were of different histological differentiation. Sixty per cent of the patients survived at least five years. (5) Non-function differentiation type (NFDT): 32 (8.9%) cases. Nineteen (59.4%) cases had lymph node metastases but no one with liver or ovary metastasis. The 5-year survival rate was 28.1%. CONCLUSION: This new cell-function classification of GC is helpful in indicating the characteristics of invasion and metastasis of GC with different cell-function differentiation phenotypes. Further study is needed to disclose the correlation between the cell-functional differentiation phenotypes and the relevant genotypes and the biological behavior of gastric carcinoma.展开更多
目的:探讨miR⁃492对恶性胶质瘤细胞迁移的影响及分子机制。方法:利用miRNA芯片检测恶性胶质瘤组织中miRNAs的表达谱,real time RT⁃PCR验证miR⁃492在恶性胶质瘤组织中的表达;用miR⁃492 mimics转染人恶性胶质瘤细胞系U87细胞,Transwell试...目的:探讨miR⁃492对恶性胶质瘤细胞迁移的影响及分子机制。方法:利用miRNA芯片检测恶性胶质瘤组织中miRNAs的表达谱,real time RT⁃PCR验证miR⁃492在恶性胶质瘤组织中的表达;用miR⁃492 mimics转染人恶性胶质瘤细胞系U87细胞,Transwell试验检测U87细胞迁移能力;利用生物信息学方法筛选miR⁃492的下游靶基因并在U87细胞中验证;Western Blot检测恶性胶质瘤中白细胞分化抗原44(CD44)蛋白的表达,并用皮尔逊相关系数分析恶性胶质瘤组织中miR⁃492和CD44的表达的相关性。结果:与癌旁组织相比,恶性胶质瘤组织中miR⁃492表达下调。miR⁃492 mimics转染可抑制U87细胞转移,同时降低CD44的表达;恶性胶质瘤组织中miR⁃492和CD44的表达呈负相关。结论:我们鉴定了miR⁃492及其靶分子CD44作为对恶性胶质瘤转移有重要作用的调节因子。miR⁃492有望成为恶性胶质瘤的一个有前途的新治疗靶点和生物标志物。展开更多
CD44 is highly expressed in human acute myeloid leukemia （AML） cells. Some experiments had shown that it was possible to reverse differentiation blockage in AML cells by CD44 ligation with specific antibodies, indic...CD44 is highly expressed in human acute myeloid leukemia （AML） cells. Some experiments had shown that it was possible to reverse differentiation blockage in AML cells by CD44 ligation with specific antibodies, indicating that CD44 was closely related to the differentiation of leukemia cells. The differentiation of acute promyelocytic leukemia cell line HL-60 cells could be induced by all trans-retinoic acid （ATRA） and hexamethylene bisacetamide （HMBA）, but so far the mechanism was not demonstrated clearly. In the present study, we investigated whether ATRA or HMBA induced the growth arrest of HL-60 cells by down-regulating the expression of CD44. The results indicated that the proliferation of HL-60 cells was obviously inhibited and the differentiation was induced by both ATRA and HMBA. The decreased expression of CD44 and cyclin E mRNA, and the increased expression of p27 and p21 at mRNA levels were observed. Furthermore, there was a negative correlation between the expression of CD44 and p27. It was concluded that ATRA and HMBA played a role in the differentiation induction of HL-60 cells, which was mediated by the down-regulation of CD44, accompanied by down-regulation of cyclin E, and up-regulation of p27 and p21 mRNA. Cellular ＆ Molecular Immunology. 2007;4（1）：59-63.展开更多
目的:探讨过表达细胞黏附样分子(close homologue of L1,CHL1)基因对乳腺癌细胞增殖、凋亡及侵袭的影响及其可能的作用机制。方法:细胞实验分为正常组(细胞常规培养,不进行外界干预)、对照组(细胞转染pcDNA3.1-CHL1-mimic-NC后,常规培养...目的:探讨过表达细胞黏附样分子(close homologue of L1,CHL1)基因对乳腺癌细胞增殖、凋亡及侵袭的影响及其可能的作用机制。方法:细胞实验分为正常组(细胞常规培养,不进行外界干预)、对照组(细胞转染pcDNA3.1-CHL1-mimic-NC后,常规培养)、实验组(细胞转染pcDNA3.1-CHL1-mimic后,常规培养);流式细胞术检测各组细胞的凋亡率,Transwell小室检测细胞的侵袭能力。Western blot检测各组细胞中CHL1、分化抗原44(CD44)表达的水平。结果:单因素方差分析显示,正常组、对照组和实验组细胞凋亡率、侵袭细胞个数及CHL1、CD44表达水平的差异均具有统计意义(F=2698.000,P=0.000;F=655.973,P=0.000;F=914.107,P=0.000;F=3653.000,P=0.000)。流式细胞结果显示实验组细胞的凋亡率明显高于对照组(P=0.000);Transwell小室显示实验组细胞的细胞侵袭个数明显少于对照组(P=0.000);Western blot检测显示实验组细胞中CHL1的表达明显高于正常组和对照组(P=0.000),CD44表达明显低于正常组和对照组(P=0.000)。结论:过表达CHL1能够抑制乳腺癌细胞增殖与侵袭能力,促使其凋亡,这可能与特异性结合CD44有关。展开更多
基金Supported by A research grant offered by Mashhad University of Medical Sciences, No. 85017
文摘AIM: To evaluate the relation of cluster of differentiation 44 (CD44) expression with clinicopathological features of gastric adenocarcinoma, and also its effect on prognosis with an emphasis on the differences between intestinal and diffuse types. METHODS: From 2000 to 2006, 100 patients with gastric adenocarcinoma, who had undergone total or subtotal gastrectomy without any prior treatment, were studied. Haematoxylin & eosin (HE) staining was used for histological evaluation, including the type (Lauren's classifi cation) and grading of the tumor. The expression of CD44 in the gastric adenocarcinoma mucosa and the adjacent mucosa were determined by immunohistochemistry. The survival analysis was obtained using the Kaplan-Meier test. RESULTS: Of 100 patients, 74 (74%) patients were male. The tumors were categorized as intestinal type (78%) or diffuse type (22%). Sixty-five percent of patients were CD44-positive. CD44 expression was not detected in normal gastric mucosa. Rather, CD44 was more commonly expressed in the intestinal subtype (P = 0.002). A signifi cant relation was seen between the grade of tumor and the expression of CD44 (P = 0.014). The survival analysis showed a poor prognosis of patients with CD44-positive tumors (P = 0.008); and this was more prominent in the intestinal (P = 0.001) rather than diffuse type. CONCLUSION: Cell adhesion molecule CD44 is highly expressed in gastric adenocarcinoma. CD44 expression is correlated with a poor prognosis in patients with the intestinal type of gastric adenocarcinoma. CD44 can, therefore, be utilized as a prognostic marker for this group of patients.
基金Project supported by the National Natural Science Foundation of China, No. 39270300. No. 39370772Training Program for Trans-Century Talents by the State Education Commission of China
文摘AIM: To reveal the correlation between the functional differentiation phenotypes of gastric carcinoma cells and the invasion and metastasis by a new way of cell-function classification.METHODS:Surgically resected specimens of 361 gastric carcinomas(GC) were investigated with enzyme-, mucin-, and tumor-related marker immunohistochemistry. According to the direction of cell-function differentiation, stomach carcinomas were divided into five functionally differentiated types. RESULTS: (1) Absorptive function differentiation type (AFDT): there were 82 (22.7%) patients including 76 (92.7%) aged 45 years. Sixty-nine (84.1%) cases belonged to the intestinal type. Thirty-eight (46.3%) expressed CD44v6 and 9 (13.6%) of 66 male patients developed liver metastasis.The 5-year survival rate of patients in this group (58.5%) was higher than those with the other types (P【0.01). (2) Mucin secreting function differentiation type (MSFDT): 54 (15%) cases. Fifty-three (98.1%) tumors had penetrated the serosa, 12 (22.2%) expressed ER and 22 (40.7%) expressed CD44v6. The postoperative 5-year survival rate was 28.6%. (3) Absorptive and mucin-producing function differentiation type (AMPFDT): there were 180 (49.9%) cases, including 31 (17.2%) aged younger than 45 years. The tumor was more common in women (62, 34.4%,) and expressed more frequently estrogen receptors (ER) (129, 81.7%) than other types (P【0.01). Ovary metastasis was found in 12 (19.4%) out of 62 female subjects. The patients with this type GC had the lowest 5-year survival rate (24.7%) among all types. (4) Specific function differentiation type (SFDT): 13 (3.6%) cases. Nine (69.2%) tumors of this type derived from APUD system, the other 4 (30.7%) were of different histological differentiation. Sixty per cent of the patients survived at least five years. (5) Non-function differentiation type (NFDT): 32 (8.9%) cases. Nineteen (59.4%) cases had lymph node metastases but no one with liver or ovary metastasis. The 5-year survival rate was 28.1%. CONCLUSION: This new cell-function classification of GC is helpful in indicating the characteristics of invasion and metastasis of GC with different cell-function differentiation phenotypes. Further study is needed to disclose the correlation between the cell-functional differentiation phenotypes and the relevant genotypes and the biological behavior of gastric carcinoma.
文摘CD44 is highly expressed in human acute myeloid leukemia （AML） cells. Some experiments had shown that it was possible to reverse differentiation blockage in AML cells by CD44 ligation with specific antibodies, indicating that CD44 was closely related to the differentiation of leukemia cells. The differentiation of acute promyelocytic leukemia cell line HL-60 cells could be induced by all trans-retinoic acid （ATRA） and hexamethylene bisacetamide （HMBA）, but so far the mechanism was not demonstrated clearly. In the present study, we investigated whether ATRA or HMBA induced the growth arrest of HL-60 cells by down-regulating the expression of CD44. The results indicated that the proliferation of HL-60 cells was obviously inhibited and the differentiation was induced by both ATRA and HMBA. The decreased expression of CD44 and cyclin E mRNA, and the increased expression of p27 and p21 at mRNA levels were observed. Furthermore, there was a negative correlation between the expression of CD44 and p27. It was concluded that ATRA and HMBA played a role in the differentiation induction of HL-60 cells, which was mediated by the down-regulation of CD44, accompanied by down-regulation of cyclin E, and up-regulation of p27 and p21 mRNA. Cellular ＆ Molecular Immunology. 2007;4（1）：59-63.
