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Biomedical subjects

Peng-Hui Wang

Publications and source records attributed to Peng-Hui Wang.

At least 19 recordsLinked to original sources
PubMed2007

A simple method to accurately position Port-A-Cath without the aid of intraoperative fluoroscopy or other localizing devices.

BACKGROUND: To evaluate the efficacy and acceptability of the Port-A-Cath (PAC) insertion method with (conventional group as II) and without (modified group as I) the aid of intraoperative fluoroscopy or other localizing devices. METHODS: A total of 158 women with various kinds of gynecological cancers warranting PAC insertion (n = 86 in group I and n = 72 in group II, respectively) were evaluated. Data for analyses included patient age, main disease, dislocation site, surgical time, complications, and catheter outcome. RESULTS: There was no statistical difference between the two groups in terms of age, main disease, complications, and the experiencing of patent catheters. However, appropriate positioning (100% in group I, and 82% in group II) in the superior vena cava (SVC) showed statistical differences between the two groups (P = 0.001). In addition, the surgical time in group I was statistically shorter than that in group II (P < 0.001). CONCLUSIONS: The modified method for inserting the PAC offered the following benefits: including avoiding X-ray exposure for both the operator and the patient, defining the appropriate position in the SVC, and less surgical time.

Anesthesia, Local↗
PubMed2006

Efficacy of combined laparoscopic uterine artery occlusion and myomectomy via minilaparotomy in the treatment of recurrent uterine myomas.

OBJECTIVE: To evaluate the therapeutic efficacy of laparoscopic uterine artery occlusion combined with myomectomy through a minilaparotomy in the treatment of recurrent uterine myomas, compared with myomectomy alone. DESIGN: Controlled, nonrandomized clinical study. SETTING: University-affiliated tertiary care referral center. PATIENT(S): Eighty-two women with symptomatic, recurrent myomas warranting surgical treatment, who expressed a strong desire to retain their uterus. Fifty-two patients (63.4%) underwent laparoscopic uterine artery occlusion and subsequent minilaparotomy and myomectomy (group I) and 30 patients (36.6%) underwent myomectomy alone (group II). INTERVENTION(S): Occlusion of the uterine arteries was performed with a laparoscopic approach before minilaparotomy and myomectomy. MAIN OUTCOME MEASURE(S): The efficacy of combined laparoscopic uterine artery occlusion and myomectomy via minilaparotomy in the treatment of recurrent uterine myomas was measured by comparing blood loss, need for blood transfusion, postoperative febrile morbidity, recurrence rate of the uterine myomas, and fertility rate in the treatment (group I) and control (group II) groups. RESULTS: The average blood loss was 125 +/- 72.6 and 550 +/- 394.8 mL in groups I and II, respectively. The recurrence rate of uterine myomas was 5.8% (3 of 52) in group I and 36.7% (11 of 30) in group II during an average follow-up period of 42.5 months. Of the sexually active patients who did not use contraception, 19.2% (5 of 26) and 22.4% (4 of 18) became pregnant in groups I and II, respectively (no statistical significance). CONCLUSION(S): This study has demonstrated the superiority of laparoscopic uterine artery occlusion when combined with repeat myomectomy in treating recurrent symptomatic myomas.

Adult↗
PubMed2006

Improved cervical cancer screening in premenopausal women by combination of Pap smear and speculoscopy.

OBJECTIVE: This study was done to evaluate the efficacy of the Pap smear, speculoscopy, and a combination of Pap smear and speculoscopy (PapSure examination) in pre- and postmenopausal women. STUDY DESIGN: All women were screened using the Pap smear and speculoscopy and combination of both (PapSure examination) in the multicenter trial. Final diagnosis of each patient was based on a histological evaluation of the colposcopic target biopsy. Results were analyzed using a proportional comparison test, sensitivity, specificity, and predictive value with significance determined at p<0.05. RESULTS: Of 1813 women screened, 1701 were eligible for analysis. Two hundred and fourteen women (12.6%) received at least one positive screening test result. Of the 1084 colposcopic biopsy specimens obtained, 24 showed low-grade squamous intraepithelial lesion (LSIL) and 19 high-grade SIL (HSIL). HSIL were considered test-positive. Rate of colposcopy was 21.5% (125/582) in the premenopausal group and 63.9% (321/502) in the postmenopausal group (p<0.001). For premenopausal women, speculoscopy (75.0%) or PapSure (91.7%) provided higher sensitivity than Pap smear (50%) (p<0.05). In postmenopausal women, no statistical significance in sensitivity existed between PapSure (85.7%) and Pap smear (57.1%). Speculoscopy (96.8%) or PapSure (96.5%) had lower specificity than Pap smear (99.6%) (p<0.001). CONCLUSION: PapSure was an accurate alternative screening method to Pap smear or speculoscopy for cervical intraepithelial lesions because of a significantly higher sensitivity along with adequate specificity for premenopausal women; however, PapSure was not a more effective cervical screening method for postmenopausal women.

Adult↗
PubMed2006

Uterine artery ligation for treatment of pregnant women with uterine leiomyomas who are undergoing cesarean section.

OBJECTIVE: To evaluate the therapeutic effects of uterine artery ligation for pregnant women with uterine leiomyomas, who are undergoing cesarean section. DESIGN: Prospective clinical study without randomization. SETTING: University-affiliated tertiary referral center. PATIENT(S): Forty-eight women with uterine leiomyomas undergoing cesarean section for obstetric reasons were enrolled into the study. Diagnosis was established with ultrasound before or during early pregnancy. INTERVENTION(S): Ligation of the bilateral uterine arteries was performed immediately after closure of the uterine incision wound. MAIN OUTCOME MEASURE(S): Blood loss during cesarean section, dominant leiomyoma size, and future surgical intervention for symptomatic leiomyoma. RESULT(S): Twenty-six (54%) of 48 patients underwent uterine artery ligation during cesarean section (group I), and 22 (46%) received cesarean section only (group II). The average follow-up time was 38.5 months. The average blood loss during surgery was 254 +/- 92.3 mL for group I and 278 +/- 160.5 mL for group II. Hemoglobin on the first postoperative day was 11.2 +/- 0.9 g/dL for group I and 10.4 +/- 1.1 g/dL for group II. One patient in group II required blood transfusion due to hemorrhage. Two patients (7.7%) in group I and 9 (40.9%) in group II underwent myomectomy or hysterectomy for symptomatic leiomyomas within 6-38 months after cesarean section. Reductions in the dominant myoma size (average: 45%) were demonstrated in group I patients postoperatively. Four patients (15.4%) in group I and three (13.6%) in group II had a repeat cesarean section during the follow-up period. CONCLUSION(S): Uterine artery ligation appears to be a promising method for treating pregnant women with uterine leiomyomas, who are undergoing cesarean section, because it is able to reduce postpartum blood loss and minimize the necessity of future surgery. Fertility is apparently not compromised by this treatment, which offers obstetricians with another choice between observation and myomectomy for pregnant women with leiomyomas who are undergoing cesarean section.

Adult↗
PubMed2006

Soyasaponin I decreases the expression of alpha2,3-linked sialic acid on the cell surface and suppresses the metastatic potential of B16F10 melanoma cells.

The transfer of sialic acids to the non-reducing terminal positions on sugar chains of glycoconjugates is catalyzed by sialyltransferases (STs). Increased sialylation is correlated with oncogenic transformation and metastatic potential. ST inhibitors may be potentially valuable as anti-cancer and anti-metastatic agents. In this study, we evaluated the effects of soyasaponin I (Ssa I), a known inhibitor of STs, on tumor metastasis through studying a highly metastatic cancer cell line B16F10. Ssa I specifically inhibited the expression of alpha2,3-linked sialic acids without affecting other glycans on the B16F10 cell surface. We also found that Ssa I decreased the migratory ability of cells, enhanced cell adhesion to extracellular matrix proteins. Finally, a pulmonary metastasis assay demonstrated that alteration of glycosylation in this way significantly reduced the ability of tumor cells to distribute to the lungs of mice. Collectively, these findings suggested that alpha2,3-linked sialic acids may play an important role in metastasis potential of B16F10 cells.

Animals↗
PubMed2006

Cyclooxygenase-2 expression is higher in ovarian cancer tissue adjacent to endometriosis than in ovarian cancer without comorbid endometriosis.

OBJECTIVES: The purpose of this study was to examine if COX-2, CK7 and CK20 are involved in the malignant transformation of endometriosis. METHODS: We compared COX-2, CK7 and CK20 expressions between isolated endometriosis lesions and endometriosis lesions adjacent to ovarian carcinoma and between isolated ovarian carcinoma and ovarian carcinoma with implants of endometriosis. Immunoreactivity was quantified using an immunohistochemical scoring system that corresponds to an image analysis-based system. RESULTS: There was no difference in COX-2, CK7 and CK20 expressions between the isolated endometriosis lesions and the endometriosis lesions adjacent to ovarian carcinoma. Similarly, CK7 and CK20 were equally expressed between the isolated ovarian carcinoma and the ovarian carcinoma with implants of endometriosis. The COX-2 over-expression rate was greater in ovarian carcinoma that was associated with endometriosis than in isolated ovarian carcinoma (27.8% versus 5.6%, P = 0.083). In endometrioid type ovarian carcinoma, the difference in COX-2 expression was statistically significant (50% versus 0%, P = 0.023). CONCLUSIONS: COX-2 over-expression may be a result of the malignant transformation of endometriosis to endometrioid type ovarian cancer or may represent an interaction between the two cellular components. With respect to cytokeratins, neither CK7 nor CK20 appear to be involved in the malignant transformation of endometriosis.

Carcinoma, Endometrioid↗
PubMed2006

Vaginal expulsion of a submucosal myoma during treatment with long-acting gonadotropin-releasing hormone agonist.

OBJECTIVE: Gonadotropin-releasing hormone agonist (GnRH agonist) therapy has been useful as an adjunct before myomectomy or hysterectomy for uterine myoma. CASE REPORT: A 26-year-old woman without sexual exposure was diagnosed with a submucosal myoma and treated with long-acting GnRH agonist. This patient exhibited heavy menstruation and severe anemia for 2 years and consulted our outpatient department. Transabdominal ultrasound demonstrated a 3.5-cm submucosal myoma within the endometrial cavity. The patient showed a marked suppression of serum estradiol concentrations throughout the treatment (< 20 pg/mL at the second dose injection). The volume of the uterus and uterine myoma decreased to two-thirds of the original size at the end of the second dose injection. However, a sudden onset of severe abdominal cramping pain occurred on the 76th day and a ping-pong sized mass was expelled from the vagina. She visited our outpatient department for evaluation, where ultrasound failed to detect the previous submucosal uterine myoma. A 3-year follow-up has been uneventful. CONCLUSION: Spontaneous expulsion of submucosal myomas might occur after the administration of GnRH agonist; hence, it may be an acceptable alternative for symptomatic females without sexual exposure.

Adult↗
PubMed2006

Poor prognosis of intraoperative rupture of mature cystic teratoma with malignant transformation.

OBJECTIVE: To present the phenomenon of the postoperative rapid progression of mature cystic teratoma (MCT) with malignant transformation (MT) when intraoperative spillage occurs during operation. CASE REPORTS: Two patients with MCT were treated, one with total hysterectomy plus bilateral salpingo-oophorectomy in an exploratory laparotomy, and the other with cystectomy with laparoscopy, respectively. Tumor spillage occurred during both operations. The postoperative pathology showed MCT with MT (squamous cell carcinoma type). Both patients were referred to our hospital and underwent treatment (3 months and 8 days, respectively, after the initial operation). At the secondary laparotomy for staging surgery, tumor dissemination was observed in both patients. CONCLUSION: Whether or not tumor dissemination is correlated with tumor rupture during operation, we emphasize that any patient with a preoperative diagnosis of MCT should have it removed intact to avoid the possibly catastrophic event of tumor dissemination.

Abscess↗
PubMed2006

Recurrent breast cancer presents as a single solid ovarian mass and ascites.

OBJECTIVE: Ovarian malignancy is highly suspected when patients present with an ovarian cystic mass lesion accompanied with ascites. However, aside from the primary origin, a metastatic lesion should be considered, since the ovary is frequently metastasized from cancers of other organs, such as the genital tract, gastrointestinal tract, and breast. Herein, we report the case of a patient with a left adnexal mass and ascites to emphasize consideration of metastatic ovarian tumors from non-gynecologic organs. CASE REPORT: A 47-year-old woman with a history of right breast infiltrating lobular carcinoma, T3N0M0, grade 3, was treated with modified radical mastectomy and axillary lymph-node dissection in July 2001. Tumor recurrence was noted in December 2003. Therefore, she underwent palliative radiotherapy and various kinds of chemotherapy. In March 2006, she experienced poor appetite and abdominal fullness, and was found to have a 12-cm adnexal mass accompanied with ascites. Ovarian cancer was suspected, and exploratory laparotomy was performed. However, metastatic carcinoma of the ovary of breast origin was finally diagnosed. CONCLUSION: In cases of pelvic tumors in patients who have a history of other primary cancers, metastasis should be suspected initially. Although the prognoses of these patients seem to be worse, intensive cytoreductive surgery would improve quality of life and offer a chance of better survival in highly selected patients.

Ascites↗
PubMed2006

Umbilicus as the only site of metastasis in recurrent ovarian cancer.

We present 2 rare cases of umbilical metastases (Sister Mary Joseph's nodule) as the first sign of late recurrent ovarian cancer. Two patients with ovarian cancer treated with optimal debulking surgery plus chemotherapy were regularly followed up postoperatively. An isolated umbilical nodule was noted accidentally 8 years and 3 years, respectively, after the initial operation. Abdominal computed tomography (CT) for both patients showed a 1.8-cm mass and a 2.3-cm mass with negative peritoneal tumor seeding. Other tumor surveys, including CA125, showed negative findings. Both patients had exploratory laparotomy and complete excision of the umbilical tumor. The pathology showed an isolated metastatic adenocarcinoma without evidence of other metastases. Both patients were treated with 4-course postoperative adjuvant chemotherapy of carboplatin and paclitaxel. Both patients have been in complete clinical remission for 22 months and 12 months, respectively. In addition to tumor marker CA125, a careful and thorough physical examination, assisted by modern imaging evaluation, is the best method for detecting early recurrence in patients with previously treated ovarian cancer. Although an umbilical metastasis usually indicates advanced disease with disseminating peritoneal spread, it does not always imply inoperable or incurable disease. Intensive treatment can improve the outcome.

Adenocarcinoma↗
PubMed2006

Single-dose sertaconazole vaginal tablet treatment of vulvovaginal candidiasis.

BACKGROUND: Vulvovaginal candidiasis (WC) is a bothersome disease in women. Poor compliance with the continuous use of antifungal vaginal drugs often results in treatment failure. The aim of the present study was to evaluate the efficacy, acceptability, and safety of single-dose sertaconazole vaginal tablet (500 mg) treatment compared with conventional 3-dose econazole vaginal tablet (150 mg) treatment for VVC. METHODS: In this open, randomized, and comparative study, 40 symptomatic patients with VVC confirmed by the smear method were enrolled. Patients in group A were treated with single-dose sertaconazole vaginal tablet and those in group B were treated continuously with econazole vaginal tablet for 3 days. RESULTS: The characteristics of the patients in both groups were comparable and without statistical difference. Group A showed a significantly better clearance rate for candidiasis than group B (100% vs. 72.2% on day 7, p = 0.013; 100% vs. 77.8% on day 14, p = 0.030), based on smear method results. Group A showed a more rapid response for symptom relief than group B on day 7, but there was no difference in overall symptom relief between group A and group B on day 14. CONCLUSION: Single-dose sertaconazole proved to be a more convenient and symptom-relieving treatment for VVC. The advantages of such management are worthy of further study in women with relapse VVC.

Administration, Intravaginal↗
PubMed2005

Altered mRNA expressions of sialyltransferases in ovarian cancers.

OBJECTIVE: Aberrant glycosylation occurs in essentially all types of experimental and human cancers, and many glycosyl epitopes constitute tumor-associated antigens (for example, CA125). Many recent studies have indicated that some, if not all, aberrant glycosylation is a result of altered sialyltransferase (ST) expression; however, there is little known of the role of the altered mRNA expression of ST in ovarian cancers. METHODS: Alterations in ST mRNA expression in postmenopausal ovarian tissues, including those of normal controls (n=24) and malignant serous ovarian cancers (n=24), were examined by means of real-time quantitative reverse transcription-polymerase chain reaction (RTQ-PCR). Maackia Amurensis Agglutinin type 2 (MAA) specific foralpha2,3-linked NeuNAc was used for immunohistochemical staining. RESULTS: Among these five STs, the mRNA expressions of three STs, including ST3Gal III, ST3Gal IV, and ST3Gal VI, were significantly decreased in patients with ovarian cancers, compared to the normal controls (P<0.001). By contrast, the mRNA expressions of ST3Gal I and ST6Gal I were increased in ovarian cancer tissues, compared to those of the normal controls (P<0.001). The ovarian epithelial carcinoma part showed strong positivity for MAA, whereas MAA staining in the stromal part was negative. Both the epithelial part and the stromal part of postmenopausal ovarian tissue showed negativity for MAA staining. However, clinico-pathological parameters, including stage, differentiation, amount of ascites, and serum levels of CA125, did not show any correlation to mRNA expression of any given-type ST. CONCLUSIONS: Our results suggest that altered mRNA expressions of alpha2,3-sialyltransferase ST3Gal I, ST3Gal III, ST3Gal IV, ST3Gal VI, andalpha2,6-sialyltransferase ST6Gal I are of importance in malignant ovarian cancers. An increased expression of ST3Gal I may contribute directly to increased alpha2,3-linked sialylation in ovarian serous carcinoma.

Female↗
PubMed2005

Attitudes toward menopause among middle-aged women: a community survey in an island of Taiwan.

OBJECTIVES: The purpose of this report is to explore the attitudes toward menopause of middle-aged women in Taiwan as well as to examine related factors. METHODS: A large community-based sample of Taiwanese women aged 40-54 years who are living on the islet of Kinmen were recruited for this study. Attitudes toward menopause were collected with a self-administered questionnaire. RESULTS: Of a targeted population of 1429 individuals, 1113 (78%) participated in the study. The mean age was 48.5+/-4.0 years (range, 43-57 years) and 434 women (39%) were premenopausal. The rate of current hormone use was 13.5%. Compared to premenopausal women, fewer postmenopausal women agreed that menopause depressed them, and that interests distracted their attention from menopause (p<0.01, Mann-Whitney test). Postmenopausal women did not believe that menopause would change their lives, and not having periods made women feel regretful. Compared with the illiterate women, higher educated women were more regretful about menopause (p<0.05, Mann-Whitney test). Women who experienced vasomotor symptoms within 2 weeks of the study expressed a more negative attitude regarding menopause. CONCLUSIONS: Women in Taiwan held a more positive attitude toward menopause as compared to prior studies in other countries. They had a more positive attitude when they actually faced menopause. Education and vasomotor symptoms had a significantly negative impact on menopausal perceptions. This report provides more insight on the perception of menopause in Taiwanese women that will guide future public health initiatives.

Adult↗
PubMed2005

Soyasaponin-I-modified invasive behavior of cancer by changing cell surface sialic acids.

OBJECTIVE: Sialylation involving tumor formation and invasive behavior goes along with altered sialyltransferase (ST) activity. A potent ST inhibitor, soyasaponin I (SsaI), was discovered to selectively inhibit the cellular alpha2,3-sialyltranserase activity. In this study, we further test the effects of SsaI on modifying the metastatic and invasive behaviors of cancer cell lines. METHODS: Nonmetastatic breast cancer cell line, MCF-7, and highly metastastic breast cancer cell line, MDA-MB-231, were used to investigate the effects of SsaI on tumor cells. RESULTS: SsaI did not affect cell growth cycle and also failed to inhibit cell growth in this study (the concentration of SsaI < or=100 muM). SsaI was as predicted to successfully inhibit cellular alpha2,3-ST activity and depressed the dose-dependent tumor cell surface alpha2,3-sialic acid expression. In addition, different concentrations of SsaI did stimulate MCF-7 cell adhesion to collagen type I linearly and significantly enhanced cell adhesion to the Matrigel-matrix. Furthermore, SsaI significantly decreased MDA-MB-231 cell migration. Reverse transcriptase polymerase chain reaction for evaluating mRNA expression of ST3Gal I, III and IV showed that SsaI also down-regulated the expression of ST3Gal IV but did not affect the other two. CONCLUSIONS: The results showed that SsaI was implicated in the invasive behavior of tumor cells, suggesting that altered alpha2,3-sialylation pathway played a crucial role in the adhesion and tumor metastases. SsaI is a good candidate for studying the biological roles of ST, and might provide a new preventive strategy in tumor metastasis.

Breast Neoplasms↗
PubMed2005

Overexpression of dihydrodiol dehydrogenase is associated with cisplatin-based chemotherapy resistance in ovarian cancer patients.

OBJECTIVE: Results of a recent study on human ovarian cancer cell lines indicated that overexpression of dihydrodiol dehydrogenase (DDH) was associated with resistance to cisplatin and disease progression. We examined the relationships between DDH expression and chemotherapy resistance in ovarian cancer patients. METHODS: Using immunohistochemistry, expression of DDH was measured in 41 patients with epithelial ovarian cancers. All patients underwent primary debulking surgery, followed with six cycles of cisplatin-based chemotherapy. Normal ovarian tissues were obtained from patients with benign gynecologic diseases (n = 14). Expression of DDH was confirmed by reverse transcription-polymerase chain reaction. The correlation between DDH expression and clinico-pathological parameters was analyzed by statistical analysis. Difference of progression-free survivals between different groups was compared by a log-rank test. RESULTS: Eighteen ovarian cancer samples (43.9%) expressed DDH at a moderate to strong level. This marked a significant difference from the negligible expression (1/14, 7.1%) found in the control group (P = 0.02). Of interest, the clear cell adenocarcinoma revealed DDH overexpression (75%) and mucinous adenocarcinoma revealed low DDH expression (16.7%), although DDH expression did not show any significant variation according to different histotypes. DDH overexpression was found in a statistically significantly higher percentage of cisplatin-resistant cases (n = 8/11; 72.7%) than in cisplatin-sensitive cases (n = 9/27; 33.3%) (P = 0.037). Using multivariate analysis, only DDH retained as an independent role in predicting a poor chance of response to cisplatin-based treatment. DDH overexpression cases (median 12 months, 95% confidence interval 4-20) demonstrated a shorter progression-free survival than DDH-negative cases (median 28 months, 95% confidence interval 23-33), but this result did not reach the statistical significance (P = 0.1742). In the advance stage, the DDH-positive group has a shorter PFS as compared with DDH-negative group, and this result closely approaches the statistical significance (P = 0.0669). CONCLUSIONS: DDH is expressed in a high percentage of primary ovarian tumors and its expression may be associated with cisplatin-based chemotherapy resistance. The possible prognostic role of DDH in ovarian carcinoma deserves further study.

Adult↗
PubMed2005

A randomized, parallel, comparative study of the efficacy and safety of nafarelin versus danazol in the treatment of endometriosis in Taiwan.

BACKGROUND: The purpose of this study was to evaluate the efficacy and safety of nafarelin, a gonadotropin-releasing hormone (GnRH) analogue, versus danazol in the treatment of women with endometriosis in Taiwan. METHODS: Fifty-nine women with laparoscopically and pathologically confirmed endometriosis were randomized to receive nafarelin or danazol for 180 days. Efficacy was assessed from mean changes in laparoscopy score (LS) and total symptom severity score (TSSS). Adverse events (AEs) and laboratory parameters, including hematology, hepatic function, blood pressure, and lipid levels, were monitored for safety evaluations. RESULTS: All demographic and baseline factors, except body weight, were comparable between the 2 treatment groups. Both nafarelin and danazol satisfactorily resolved pelvic tenderness, induration, pelvic pain, dysmenorrhea and dyspareunia. No significant differences were noted in efficacy endpoints between nafarelin and danazol regarding LS and TSSS at 90 and 180 days of treatment. No significant difference was observed between the 2 groups regarding the overall incidence of AEs, except for laboratory-related AEs. However, nafarelin tended to have less impact than danazol on aspartate transaminase and alanine transaminase, and nafarelin was better tolerated than danazol regarding changes in lipid profiles. Both treatments had little or no effect on hematologic parameters. CONCLUSION: Nafarelin and danazol demonstrated similar clinical efficacy, but nafarelin was associated with fewer laboratory changes and a stable lipid profile, relative to danazol. Moreover, intranasally administered nafarelin is noninvasive, and may be a more comfortable and safer alternative to slow-release injectable GnRH agonists. Based on this study, we suggest that nafarelin, like other GnRH analogues, may be a treatment of choice for Taiwanese women with endometriosis. However, direct comparative studies of nafarelin with slow-release injectable GnRH agonists are now required.

Adult↗
PubMed2005

Role of estrogen and progesterone in the survival of ovarian tumors--a study of the human ovarian adenocarcinoma cell line OC-117-VGH.

BACKGROUND: The role of estrogen and progesterone in ovarian carcinogenesis and the growth and survival of ovarian cancer cells is controversial. In this study, we tested the effects of various concentrations of estrogen and progesterone on the survival of an ovarian cancer cell line. METHODS: The ovarian adenocarcinoma cell line, OC-117-VGH, is deficient in the following receptors: estrogen receptor (ER)alpha, ERbeta, and progesterone receptor (PR). Serial concentrations of estrogen and progesterone were used to evaluate the effects of estrogen and progesterone on the survival of ovarian cancer cells. The apoptosis-related genes Bcl-2 and Bax were used to check the possible mechanism of an estrogen or progesterone effect on survival of the cancer cell line. RESULTS: Estrogen 0.01-1.0 microM and progesterone 0.1-10.0 microM affected cell survival. As predicted, progesterone successfully downregulated anti-apoptotic Bcl-2 expression, and dose-dependently suppressed Bcl-2 expression in tumor cells. Paradoxically, estrogen showed the same effects. In addition, both hormones downregulated proapoptotic Bax expression. The net effect confirmed the role of downregulated Bcl-2 in reducing the survival of ovarian cancer cells. CONCLUSION: Based on the findings of decreased survival and/or growth in OC-117-VGH ovarian adenocarcinoma cells treated with either estrogen or progesterone, we suspect that both hormones act effectively against ER-negative and PR-negative ovarian cancer cells. These findings should lead to a reassessment of hormone therapy for ovarian cancers.

Adenocarcinoma↗