Proliferating cell nuclear antgen(PCNA) plays an important role in DNA synthesis in nucleoli and is highly conserved non-histone nuclear protein composed of 261 amino acid. and is considered to correlated with the cells proliferative state, because it is synthesized particulary during the proliferative period of late Gland S-phase. Therefore, PCNA index meaningfully increases in the active or proliferative kinetic cells. By the use of recently developed monoclonal antibodies against PCNA, the immunohistochemical staining methods can make possible. These staining methods are the useful and productive one for ascertaining the cell's proliferating abillity. Moreover, immunohistochemical staining method with a antiPCNA antibody has particulrar advantages as follows. By means of these methods, we can stain the tissue that was already fixed in formalin or paraffin wax. We can see with naked eye that which cell is, where is differentiated through a microscope. Lastly, it maintains the whole tissue architecture and makes a search for the correlation. As we have seen above, the immunohistochemical staining methods for PCNA have been studied as an impotant factor that can find the cell proliferative kinetics in malignancy and biologic behavior of tumors. To investigate of the proliferative activity in thyroid nodule, Authors evaluated cell proliferative activity by immunostaing for PNCA in 45 pathologically confirmed solitary thyroid nodule. The results were as follows. 1) The benign nodules were 25 cases(Adenomatous Goiter: 20 cases, Follicular adenoma: 5 cases) and malignant nodules were 20 cases(Papillary Ca : 14 cases, Follicular Ca : 4 cases, Anaplastic Ca : 2 cases). 2) The Most prevalent age groups were 4th decade(11 cases), and the next group was 5th decade. 3) The average PCNA labelling indices were as follows. Adenomatous goiter(I6.9%), Follicular adenoma(37.6%), papillary Ca(26.3%), Follicular Ca(8.8%) and Anaplastic Ca(86.7%). There were no significant differences in benign(20.4) and malignant nodules (28.8%) except anaplastic Ca(p=0.3226). 4) When the average tumor size 2cm in papillary Ca, the PCNA indices were 26.0% (below 2cm) : 26.6% (above 2cm) (p=0.9642). The PCNA incidies were 23.9% (with lymphatic spread) : 28.7% (without lymphatic spread) (p=0.7056). There were no signlficant differences in the above cases. In conclusion, there were no significant differences in cell proliferative activity by staining for PCNA between benign and malignat nodules except anaplastic Ca.
Kim, Hyun-Jung;Kang, La-Mi;Ahn, Jin-Young;Han, Jung-Soon;Kim, Seung-U.;Lee, Kwang-Woo;Kim, Man-Ho
Journal of Ginseng Research
/
v.28
no.1
/
pp.39-44
/
2004
The present study is to determine whether the Red-ginseng extract has a proliferative or cytotoxic effect on the human neuronal stem cells(hNSCs). The hNSCs were grown and incubated with different doses of Red-ginseng extract. We tested the proliferative or cytotoxic effects by MTT and FACS analysis. Cell viability cell cycle analysis, DNA fragmentation, and bax or PARP expressions were evaluated. The hNSCs showed a proliferafe trend with its peak concentration at 0.3 $\mu\textrm{g}$/$m\ell$. Beyond this point, higher doses decreased viabilities and showed a cytotoxic effect at 10 $\mu\textrm{g}$/$m\ell$. There was a tendency of increased S and G2/M phases during cell proliferation. In a cytotoxic condition, decreased S phase and increased G0/G1 phases were noted, suggesting cell cycle arrest. The cytotoxic effect was associated with increase DNA fragmentation in a dose-dependent manner, However PARP cleavage or bax expression was not detected. Our results suggest that Red-ginseng extract has dual effects, the cell proliferative or cytotoxic effect, on hNSCs in vitro with dose-dependent manner.
Zamani, Afiqah;Jusoh, Siti Asmaa Mat;Al-Jamal, Hamid Ali Nagi;Sul'ain, Mohd Dasuki;Johan, Muhammad Farid
Asian Pacific Journal of Cancer Prevention
/
v.17
no.11
/
pp.4857-4861
/
2016
Background: Imatinib mesylate, a tyrosine kinase inhibitor specifically targeting the BCR/ABL fusion protein, induces hematological remission in patients with chronic myeloid leukemia (CML). However, the majority of CML patients treated with imatinib develop resistance with prolonged therapy. Dendrophthoe pentandra (L.) Miq. is a Malaysian mistletoe species that has been used as a traditional treatment for several ailments such as smallpox, ulcers, and cancers. Methods: We developed a resistant cell line (designated as K562R) by long-term co-culture of a BCR/ABL positive CML cell line, K562, with imatinib mesylate. We then investigated the anti-proliferative effects of D. pentandra methanol extract on parental K562 and resistant K562R cells. Trypan blue exclusion assays were performed to determine the IC50 concentration; apoptosis and cell cycle analysis were conducted by flow cytometry. Results: D. pentandra extract had greater anti-proliferative effects towards K562R ($IC50=192{\mu}g/mL$) compared to K562 ($500{\mu}g/mL$) cells. Upon treatment with D. pentandra extract at the IC50. concentration: K562 but not K562R demonstrated increase in apoptosis and cell cycle arrest in the G2/M phase. Conclusion: D. pentandra methanol extract exerts potent anti-proliferative effect on BCR/ABL positive K562 cells.
Park, Dong-Yeop;Park, Ae-Ra;Jung, Eun-Hee;Bae, Jae-Hyeong;Lee, Guk-Cheon;Hwang, Bo-Won;Lee, Min-Kwon
Korean Journal of Veterinary Service
/
v.32
no.4
/
pp.361-368
/
2009
Porcine proliferative enteritis (PPE) is a transmissible gastroenteric disease caused by Lawsonia intracellularis. Clinically, PPE causes hemorrhagic diarrhea and sometimes death in growing pigs, but when the disease progresses to a chronic phase, the infected pig no longer displays significant symptoms. The purpose of the present studies were carried out to determine L. intracellularis in the pig farms and slaughter house, in Gyeongnam area. A survey of proliferative enteritis in pig was conducted using polymerase chain reaction (PCR) testing method, total 1,495 samples. PCR products showed a specific band at the 210bp, 329bp in the specimens of feces and mucosal scraping. Of 420 fecal specimens, 113 (26.9%) were identified as positive to PPE. Of 1,075 mucosal scraping specimens, 109 (10.1%) were identified as positive to PPE. Of total 1,495 specimens, 222 (14.8%) were identified as positive to PPE.
Objectives: To investigate the distribution of $ER{\alpha}$, $ER{\beta}$, c-fos and c-jun in the uterine myoma and myometrium in oder to know how the tamoxifen cause the growth of myoma. Methods: Myoma and myometrial tissue were obtained from the postmenopausal women treated with tamoxifen in the patients with breast cancer and in the premenopausal patients, who were undergoing myoma of uterus from 1998 through 2000. The espression of each gene was quantitated with quantitative RT-PCR. Results: The expression of $ER{\alpha}$ was slightly increased in the myoma than the myometrium in the proliferative phase, and was slightly decreased in the myometrium than the myoma in the secretory phase. However it was not significant statistically. In the postmemopausal women treated with tamoxifen, $ER{\alpha}$ was expressed in all myoma and myome1rial tissues and the expression was not statistically significant. The expression ofER~ was slightly increased in the myome1rium than the leiomyoma in the proliferative and secretory phase, but it was not significant statistically. In the postmemopausal women treated with tamoxifen, the expression of ER~ was significantly incresed in the myome1rium than the leiomyoma. The expression of c-fos was significantly increased in the myome1rium than the leiomyoma in the proliferative and secretory phase. In the postmemopausal women treated with tamoxifen, the expression of c-fos was slightly increased in the leiomyoma than the myomelrium, however, it was not statistically significant. Conclusion: Tamoxifen may cause the growth of leiomyoma by $ER{\alpha}$ with AP-l pathway reducing the counteraction of 6$ER{\beta}$ to $ER{\alpha}$.
The maintenance of a viable pregnancy has long been viewed as an immunological paradox. The deveolping embryo and trophoblast are immunologically foreign to the maternal immune system due to their maternally inherited genes products and tissue-specific differentiation antigens (Hill & Anderson, 1988). Therefore, speculation has arisen that spontaneous abortion may be caused by impaired maternal immune tolerance to the semiallogenic conceptus (Hill, 1990). Loss of recall antigen has been reported in immunosuppressed transplant recipients and is associated with graft survival (Muluk et al., 1991; Schulik et al., 1994). Progesterone $(10^{-5}M)$ has immunosuppressive capabilities (Szekeres-Bartho et al., 1985). Previous study showed that fertile women, but not women with unexplained recurrent abortion (URA), lose their immune response to recall antigens when pregnant (Bermas & Hill, 1997). Therefore, we hypothesized that immunosuppressive doses of progesterone may affect proliferative response of lymphocytes to trophoblast antigen and alloantigen. Proliferative responses using $^3H$-thymidine ($^3H$-TdR) incorporation of peripheral blood mononuclear cells (PBMCs) to the irradiated allogeneic periperal blood mononuclear cells as alloantigen, trophoblast extract and Flu as recall antigen, and PHA as mitogen were serially checked in 9 women who had experienced unexplained recurrent miscarriage. Progesterone vaginal suppositories (100mg b.i.d; Utrogestan, Organon) beginning 3 days after ovulation were given to 9 women with unexplained RSA who had prior evidence of Th1 immunity to trophoblast. We checked proliferation responses to conception cycle before and after progesterone supplementation once a week through the first 7 weeks of pregnancy. All patients of alloantigen and PHA had a positive proliferation response that occmed in the baseline phase. But 4 out of 9 patients (44.4%) of trophoblast antigen and Flu antigen had a positive proliferative response. The suppression of proliferation response to each antigen were started after proliferative phase and during pregnancy cycles. Our data demonstrated that since in vivo progesterone treated PBMCs suppressed more T-lymphocyte activation and $^3H$-TdR incorporation compare to PBMCs, which are not influenced by progesterone. This data suggested that it might be influenced by immunosuppressive effect of progesterone. In conclusion, progesterone may play an important immunological role in regulating local immune response in the fetal-placental unit. Furthermore, in the 9 women given progesterone during a conception cycle, Only two (22%) repeat pregnancy losses occured in these 9 women despite loss of antigen responsiveness (one chemical pregnancy loss and one loss at 8 weeks of growth which was karyotyped as a Trisomy 4). These finding suggested that pregnancy loss due to fetal aneuploidy is not associated with immunological phenomena.
The increased potential for vascular smooth muscle cell (VSMC) growth is a key abnormality in the development of atherosclerosis and post-angioplasty restenosis. Abnormally high activity of platelet-derived growth factor (PDGF) is believed to play a central role in the etiology of these pathophysiological situations. Here, we investigated the anti-proliferative effects and possible mechanism(s) of murrayafoline A, a carbazole alkaloid isolated from Glycosmis stenocarpa Guillamin (Rutaceae), on PDGF-BB-stimulated VSMCs. Murrayafoline A inhibited the PDGF-BB-stimulated proliferation of VSMCs in a concentration-dependent manner, as measured using a non-radioactive colorimetric WST-1 assay and direct cell counting. Furthermore, murrayafoline A suppressed the PDGF-BB-stimulated progression through $G_0/G_1$ to S phase of the cell cycle, as measured by [$^3H$]-thymidine incorporation assay and cell cycle progression analysis. This anti-proliferative action of murrayafoline A, arresting cell cycle progression at $G_0/G_1$ phase in PDGF-BB-stimulated VSMCs, was mediated via down-regulation of the expression of cyclin D1, cyclin E, cyclin-dependent kinase (CDK)2, CDK4, and proliferating cell nuclear antigen (PCNA), and the phosphorylation of retinoblastoma protein (pRb). These results indicate that murrayafoline A may be useful in preventing the progression of vascular complications such as restenosis after percutaneous transluminal coronary angioplasty and atherosclerosis.
Retinoic acid (RA) and dibutyryl cyclic AMP (dbcAMP) induce the differentiation of the multipotent embryonic carcinoma cell line, F9 cells, into parietal endoderm like cell. The F9 cells are highly proliferative doubling approximately 12 hourse. S Phase is predominant, lasting 10 hours and G2/M phase occupies most of the remaining cycle (2 hours) and G1 phase is nearly non-existent. In this study, we showed the effect of RA and dbcAMPon the cell cycle associated molecules (especially around G1 phase) during F9 cell differentiation. Differentiation of F9 cells was induced by the combined addition of RA ($10^{-7}M$) and dbcAMP (0.5mM), and cells were harvested daily up to 4 days. Flow cytometric analysis showed the prolongation of G1 phase around 30 hours after induction. Western blot analysis revealed that the amount of cyclin D1 and cdk2 were increased at day 4. However, histone H1 kinase activity of cdk2 was decreased. These data strongly suggest that RA and dbcAMP induce the growth arrest of F9 cells at G1 phase by decreasing the activity of cdk2, although they have increased the protein contents of cyclin D1 and cdk2. The reason for the discrepancy between the H1 kinase activity and protein contents are not clear yet.
Objective: To investigate the distribution of BCL-2, BAX proteins and DNA fragmented cells in the normal human endometrium during at each menstrual cycle in order to find out whether apoptosis regulates cyclic endometrial change. Methods: Normal endometrial tissues were obtained from 40 patients, $32{\sim}45$ year of age, all with regular menstrual cycle, who were undergoing abdominal hysterectomy for myoma of uterus or cervical intraepithelial neoplasia for the period from 1992 through 1997. Immunohistochemical staining was used to determine the expression of BCL-2 and BAX protein with paraffin-embedded tissues. Results: BCL-2 was expressed on the glandular epithelial cells and stromal cells during the proliferative phase. The intensity of BCL-2 was increased predominantly on the basal layer than the functional layer in late proliferative phase. However, BCL-2 immunoreactivity was decreased in the secretory phase. BAX was expressed predominantly during the secretory phase. The intesity was increased in late secretory phase rather than early secretory phase. DNA fragmented cells were detected in a few cells at each phase. However, it was increased during the late secretory phase. Conclusion: Apoptosis-related genes, BCL-2 and BAX, may play a role in the regulation of cyclic endometrial change.
Incidence of estrum or abortions in pregnant cows may be affected by large follicles developed together with corpus luteum in pair ovaries of pregnant cows. But the follicles of pregnant phase were not assessed about histological findings. Determination of the healthy and atretic follicles by presence of proliferative cells or apoptotic cells and histological compositions of follicles would be used as important data on measurements of ovarian functions. This study was focussed mainly to investigate macroscopical, histological and immunohistochemical findings of ovarian follicles of pregnant Korean native cows and dairy cows (Holstein). In immunohistochemical methods, assessments of proliferative cells using PCNA antibody and apoptotic cells using TUNEL methods were performed. The follicles were observed on all 24 pregnant cows (17 Korean native cows and 7 Holstein cows). Follicles of greater than 10 mm in daimeter were developed in 37.5% (9/24 heads) of these pregnant cows. largest follicles from in these cows were $16.0{\times}15.0mm$ in diameter in a Korean native cow(l20 days of gestation), $13.4{\times}10.1mm$ in a Korean native cow(50 days of gestation), $12.9{\times}11.5mm$ in a Holstein cow (120 days of gestation). 40.5% among all follicles having diameter of greater than 1.0 mm in pregnant cows were assessed as atretic follicles and in addition, healthy follicles also showed less in number and smaller in size and thinner in wall layer compared with those of cyclic phase ovaries. In immunohistochemical findings, also proliferative positive cells and apoptotic positive cells on the granulosa cell layers in the healthy follicles of pregnant cows appeared less than on those of cyclic follicles. So these follicles were assessed as weakly active follicles. In large follicles, above positive cells were not nearly appeared but granulosa cell debris were more appeared among the granulosa cells. So these large follicles were assessed as inactvie or atretic follicles. The above findings suggest that small follicles of pregnant phase were weakly active or atretic and large follicles were inactive or atretic.
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