1.Study of the role of spleen in idiopathic portal hypertension.
Li WANG ; Wei HAN ; Tao ZHOU ; Meng-biao YUAN
Chinese Journal of Hepatology 2006;14(2):133-134
2.Prognostic significance of proliferating cell nuclear antigen-positive growth fraction in gastric adenomas.
Woo Ho KIM ; Ghee Young CHOI ; Yong Il KIM
Journal of Korean Medical Science 1992;7(3):199-203
The proliferative activity of gastric adenomas from 18 patients (42 endoscopic procedures) was compared with follow-up results. These cases were gastric adenomas proven by follow-up with repeated endoscopic procedures for more than 2 years, or were confirmed as gastric adenocarcinoma thereafter by histopathologic examination. Among the eighteen cases, nine showed carcinoma in the subsequent biopsies (group 1) and the remaining nine did not result in carcinoma (group 2). The proliferating cell nuclear antigen (PCNA) positivity rates of the two groups were significantly different (P < 0.01). The average PCNA positivity in group 1 was 33.1%, while it was 10.0% in group 2. The risk of developing carcinoma increased as the PCNA positivity increased: 0% in the low PCNA positivity group, 41% in the mid-positivity group and 89% in the high positivity group. We concluded that growth fraction could be taken into account as one of the most important prognostic factors for gastric adenoma, and accordingly repeated endoscopic biopsies with close follow-up should be carried out especially in the high PCNA positivity group.
Adenoma/*immunology
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Antigens, Neoplasm/immunology/*metabolism
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Carcinoembryonic Antigen/metabolism
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Cell Cycle
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Follow-Up Studies
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Gastroscopy
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Humans
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Nuclear Proteins/*metabolism
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Prognosis
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Proliferating Cell Nuclear Antigen
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Stomach Neoplasms/*immunology
5.Effect of scrotal reconstruction with flap on rabbit generation function.
Da-Li WANG ; Guang-Feng SUN ; Zai-Rong WEI ; Hong-Wang CUI ; Li LI
Chinese Journal of Plastic Surgery 2008;24(6):455-459
OBJECTIVETo explore the apoptosis and the express of proliferating cell nuclear antigen (PCNA) in spermatogenic cells, and study generation function of the rabbit after scrotal reconstruction with flaps.
METHODSThe 48 New Zealand white rabbits were randomly divided into three groups as experimental group (the scrotum reconstructed with flaps, n = 48), the control group (the sham operated group, n = 24) and the blank group (n = 18). The apoptosis and the expression of PCNA in the spermatogenic cells were detected with TUNEL and the immunohistochemistry from the 3rd to the 8th week after operation. 8 weeks later, 12 animals in each group were fed respectively with one female rabbit to observe the procreation.
RESULTSThe apoptotic index of the spermatogenic cells in blank group was 7.73 +/- 4.95. 3 weeks after operation, the apoptotic index of spermatogenic cells was 22.59 +/- 3.04 in the experimental group, and 21.13 +/- 1.68 in control group, showing no significant difference between the two groups (P > 0.05). 8 weeks after operation, the apoptotic index of spermatogenic cells was 71.85 +/- 2.69 in the experimental group, and 13.64 +/- 2.09 in control group, show a significant difference between them (P < 0.05). The apoptotic index in experimental group increased gradually from the 3rd to 8th week after scrotal reconstruction , which was markedly higher than that in the blank group (P < 0.05). The apoptotic index in control group was higher than that in the blank group at the 3rd week (P < 0.05), but not at the 8th week (P > 0.05). The proliferation index of spermatogenic cells was 9.32 +/- 9.30 and 12.52 +/- 3.87 in experimental group at the 3rd and 4th week, respectively, which was significantly lower than that in blank group (43.07 +/- 2.25) and control group (45.69 +/- 4.98) at the 3rd week (P < 0.05). The proliferation index of spermatogenic cells was 46.98 +/- 18.92 and 49.53 +/- 9.79 in experimental group at the 7th and 8th week, respectively, 39.90 +/- 5.10 in control group at the 8th week, showing no difference between the two groups (P > 0.05). The proliferation index of spermatogenic cells in control group at the 3rd and 8th week was not different from that in the blank group (P > 0.05). The female pairing rabbits in the blank and control group were all pregnant, and the average childbirths were 6.0 +/- 1.28 and 5.92 +/- 1.31 respectively, with no difference between the two groups (P > 0.05). All the female pairing rabbits in the experimental group were not pregnant, showing a significant difference from those in the blank and control group (P < 0.05).
CONCLUSIONSThe rabbit generation functional disturbance after scrotal reconstruction with flaps is due to the excessive apoptosis of spermatogenic cell. The spermatogenic cell proliferation is affected only in the early postoperative period, but can recover later.
Animals ; Apoptosis ; Cell Proliferation ; Male ; Proliferating Cell Nuclear Antigen ; metabolism ; Rabbits ; Scrotum ; surgery ; Seminiferous Epithelium ; cytology ; Skin Transplantation ; Surgical Flaps
6.The characteristics of PCNA expression in hypertrophic scars and chronic ulcers and implication of the expression.
Tongzhu SUN ; Xiaobing FU ; Xiaoman GU ; Yinhui YANG ; Xiaoqing SUN
Chinese Journal of Plastic Surgery 2002;18(4):232-233
OBJECTIVETo investigate the characteristics of PCNA expression in hypertrophic scars and chronic ulcers and to discuss its relation to their formation.
METHODSThe expressive quantity and sites of PCNA were detected with the immunohistochemical SP method.
RESULTSPCNA was expressed in all samples. The expressive quantity in hypertrophic scars was higher than chronic ulcers(P < 0.01). The expressive sites of all samples were in the nucleus of fibroblasts and capillary endothelial cells.
CONCLUSIONSThe expressive quantity of PCNA was more in hypertrophic scars and less n chronic ulcers. The quantitative difference of expression between hypertrophic scars and chronic ulcers may be correlated to their formation.
Adult ; Cicatrix, Hypertrophic ; metabolism ; pathology ; Female ; Humans ; Male ; Proliferating Cell Nuclear Antigen ; biosynthesis ; Skin Ulcer ; metabolism ; pathology
7.Influence of hypoxia on the proliferation and activity of human umbilical vein endothelial cells.
Guang-Ping LIANG ; Yong-Yue SU ; Jian CHEN ; Wei CHEN ; Xiang-Dong LUO ; Zong-Cheng YANG
Chinese Journal of Burns 2007;23(2):130-132
OBJECTIVETo investigate the influence of hypoxia on the proliferation and activity of human umbilical vein vascular endothelial cells (EA. hy926).
METHODSEA. hy926 cells were cultured in vitro and divided into normal control and hypoxia groups. The cells in hypoxia group were placed into hypoxic jar and treated with mixed gases(94% N2 +5% CO2 + 1% O2) for 1,3,6 and 12 hours. Then the total proteins were extracted for the determination of the expression of vascular endothelial growth factor (VEGF) and proliferation cell nuclear antigen (PCNA). The cell cycle and growth curve were determined with flow cytometry and MTT method, respectively.
RESULTSThe expression of PCNA protein began to increase at 3 post-hypoxia hour (PHH), peaked at 6 PHH, but without obvious difference compared with that at 12 PHH. The expression of VEGF began to increase at 1 PHH, peaked at 6 PHH, and decreased at 12 PHH, though it was still markedly higher than that of normoxia at 12 PHH. MTT results showed that the cell activity began to increase at 1 PHH, and it was still to increased at 3 PHH, then decreased at 6 PHH, and it was lower than that in control group at 12 PHH. The number of cells in G0/G1 phase was decreased, but the cells in S and G2/M phase was increased at 1, 3, 6 PHH when compared with those in normal controls. The proliferation index (PI) of cells in hypoxia group at 1PHH (43 +/- 9)%, 3PHH (39 +/- 11)%, 6 PHH (40 +/- 11))% were higher than that before hypoxia (32 +/- 9)% and 3 (39 +/- 11) % and 6 hours (40 +/- 11)% after hypoxia (P < 0.05). The PI was obviously lower at 12 PHH (27 +/- 4))% compared with that of cells under normoxic condition (P < 0.05).
CONCLUSIONShort-term hypoxia is beneficial to promote the proliferation of the cells, but this effect will be inhibited with the prolongation of hypoxia.
Cell Hypoxia ; Cell Proliferation ; Cells, Cultured ; Endothelial Cells ; metabolism ; Humans ; Hypoxia ; metabolism ; pathology ; Proliferating Cell Nuclear Antigen ; metabolism ; Umbilical Veins ; cytology ; Vascular Endothelial Growth Factor A ; metabolism
8.The effect of shRNA targeting hTERT on telomerase and the expression of PCNA and Caspase-3 in nasopharyngeal carcinoma cells.
Yongzhong SHEN ; Yan WANG ; Shiming CHEN ; Bokui XIAO ; Jun SU ; Zezhang TAO
Journal of Clinical Otorhinolaryngology Head and Neck Surgery 2008;22(9):411-415
OBJECTIVE:
Analysis of the correlation between telomerase and expression of its related proteins may provide insight into the molecular mechanism of nasopharyngeal carcinogenesis. Here, we investigate the effect of short hairpin RNA (shRNA) specific for human telomerase reverse transcriptase (hTERT) mRNA on the expression of proliferating cell nuclear antigen (PCNA) and Caspase-3 in nasopharyngeal carcinoma (CNE) cells.
METHOD:
shRNA expression vectors targeting the mRNA of hTERT were constructed. Cells were treated with the constructed expression vectors and telomerase activity was measured by telomeric repeat amplification ELISA (TRAP-ELISA). Cell viability was examined using the MTT assay. Cell apoptosis was detected by TUNEL method. The expression of PCNA and Caspase-3 proteins, was determined by Western blotting.
RESULT:
shRNA specific for hTERT mRNA significantly inhibited telomerase activity, suppressed cell viability and induced apoptosis in CNE cells. In addition, the expression of PCNA was inhibited, while the expression of Caspase-3 was up-regulated.
CONCLUSION
Our results suggest that shRNA directed against hTERT inhibits cell viability by regulating telomerase activity and its related protein expression in NPC cells. Therefore, RNA-interfering technology may be a promising strategy for the treatment of nasopharyngeal cancer.
Caspase 3
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metabolism
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Cell Line, Tumor
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Cell Survival
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Humans
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Nasopharyngeal Neoplasms
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genetics
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metabolism
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Proliferating Cell Nuclear Antigen
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metabolism
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RNA, Small Interfering
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Telomerase
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genetics
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Transfection
9.Expression and significance of survivin and PCNA in sinonasal inverted papilloma.
Lina PENG ; Chunguang SHAN ; Zhixing FENG ; Lihui YANG
Journal of Clinical Otorhinolaryngology Head and Neck Surgery 2013;27(5):264-266
OBJECTIVE:
To explore the expression and significance of survivin and proliferating cell nuclear antigen (PCNA) on the occurrence, proliferation, recurrence and carcinogenesis of the sinonasal inverted papilloma (SNIP).
METHOD:
Immunohistochemical method was used to detect the expression of survivin and PCNA in 10 cases of nasal cavity mucosal (NM), 45 cases of SNIP and 9 cases of canceration SNIP.
RESULT:
The positive expression of survivin and PCNA increased gradually in NM,SNIP and canceration PCNA group, and there were significant difference between the three groups. But there was no correlation between survivin and PCNA in the tissue of SNIP (r = 0.135, P > 0.05).
CONCLUSION
Survivin and PCNA are involved in the growth and carcinogenesis of SNIP.
Humans
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Inhibitor of Apoptosis Proteins
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metabolism
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Nose Neoplasms
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metabolism
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pathology
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Papilloma, Inverted
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metabolism
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pathology
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Paranasal Sinus Neoplasms
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metabolism
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pathology
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Proliferating Cell Nuclear Antigen
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metabolism
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Repressor Proteins
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metabolism
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Survivin