No abstract available.

OBJECTIVE: To determine the significance of high risk human papilloma virus (HPV) infection and involvement of the resection margins of cervical cone biopsy specimens removed by loop electrosurgical excision procedure (LEEP) in the management of cervical intraepithelial neoplasia (CIN III). METHODS: Records of 506 LEEP procedures performed due to abnormal Pap result between December 1995 and December 1998 were reviewed. Among them, 232 cases with histologically proven as CIN III in LEEP and follow-up Pap smear more than 6 months was available were assessed. All patients were assigned according to HPV infection and resection margin involvement in LEEP, and recurrence rate in the follow-up was compared with reference to post-LEEP treatment regimen, observation or hysterectomy in each group. RESULTS: Of 232 cases reviewed, 10 cases(4.3%) were ASCUS, 19 cases(8.2%) were LSIL, 199 cases(85.8%) were HSIL, and 4 cases(1.7%) were invasive cancer in initial Pap smear. Abnormal Pap result in the follow-up was as follows: 4 cases of ASCUS, no case of LSIL, and 6 cases of HSIL. Excluding ASCUS, the overall recurrence rate in the follow-up was 2.6%(6/232). HPV positive was 164(70.7%) and HPV negative was 68(29.3%) in the LEEP specimen. Of 164 HPV positive, 41 were followed up without further treatment and 123 with hysterectomy. There was no significant difference in the recurrence rate between the two groups(P=0.41). Of 68 HPV negative, 27 were only followed up and in 41, hysterectomy was done. And also, there was no significant difference(P=0.32). Of 232 cases, resection margin was positive in 167(72.0%) and negative in 65(28.0%). Of 65 margin negative, 29 were followed up without further treatment and 36 with hysterectomy. There was no significant difference in the recurrence rate between the two groups(P=0.36). Among 167 margin positive, 39 were only followed up and in 128 hysterectomy was done. Recurrence rate was significantly higher in followed up only group(P=0.04). CONCLUSION: HPV infection in LEEP specimen was not helpful in deciding post LEEP treatment modality in CIN III patient. But, when resection margin was positive, hysterectomy should be performed because by doing so, recurrence rate was significantly lower than when only follow up was done.
Biopsy ; Cervical Intraepithelial Neoplasia ; Follow-Up Studies ; Humans ; Hysterectomy ; Papilloma ; Recurrence

Ouarian tumors of low malignant potential(OTLMP) or borderline tumors account for approximately 10% of all ovarian neaplasms. Borderline tumors have some but not all of the histologic characteristics af ma lignancy : stratification of epitheliial cells, with some degree of nuclear atypia a,nd inereased mitotic actitity but. without stromal invasion. We reviwed 20 published Rnglish written articlea from 1978 to 1992 and Korean gynecologic cancer regestry of 1990. In this review, we tried to concentrate on several debating is sues in OTLMP: 1) What kind of surgery is needed for each stages?, 2) Is postoperative adjuvant t.herapy needed?, 3) Jf needed, which type? Following result were obtained from the besis of 1516 patients with OTLMP. Patients withh OTLMIP are younger than those with invasive ovarian cancers', mean age was in their forties. The majority of patients(74.5%) had stage I disease, and the incidence dropped ahruptly to 9.4% for stage ll, 15.7% for stage III and 0.4% for stage IV. The most cammon histologic subtype was serous(56.7%), followed by muci noua(38.1%), However, interestingly in Korea and Japan, the mucinous type was the most common one. The primary treatment for OTLMP was surgery, and the conservative surgery to preserve fertility in young women was sufficient for stage I disease with careful follow-up. The majority of patients(79.1%) with stage I disease were treated by surgery alone. Adjuvant such as chemotherapy (CT) and/or radiotherapy(RT) could prolong the recurrence of disease a little later, but failed to increase diaease-free survival significantly in stage I disease. In stageII disease, the surgery should be a total abdominal hysterectomy and bilateral salpingo-oophorectomy with multiple sampling of the peritoneal cavity. About a third of patients with stageII disease received no adjuvant therapy and the others received CT and/or RT, however, there was no difference in outcome of recurrence and survival. In advanced stage. 15% of patients received no adjuvant therapy after initial debulking surgery, and the rest of patients received CT and/or RT. No differences in recurrence and survival between each groups were noticed , too. The status of second-look laparotomy(SLL) did not depend on the stage of the disease. Positive rate of SLL for stage I diaease was not statistically different from that for the combined stages II-IV. Survival for stage I at 5 years was reported to range from 80 to 100%, and even stage III had survival ranging from 64 to 96%. Long-term survival at 15~20 years was also good. Although it is quite difficult to make conclusions because of the lack of prospective randomized studies from this review, it appears clear that surgical removal of the tumor and careful follow-up of patients are all that are necessary in stage I disease and further multi-center prospective study for the effect of adjuvant therapy in advanced disease is definitely needed.
Drug Therapy ; Female ; Fertility ; Follow-Up Studies ; Humans ; Hysterectomy ; Incidence ; Japan ; Korea ; Mucins ; Peritoneal Cavity ; Prospective Studies ; Recurrence

No abstract available.
Classification*

No abstract available.
Cystadenocarcinoma*

Skin photoaging occurs due to chronic exposure to solar ultraviolet radiation (UV), the main factor contributing to extrinsic skin aging. Clinical signs of photoaging include the formation of deep, coarse skin wrinkles and hyperpigmentation.Although melanogenesis and skin wrinkling occur in different skin cells and have different underlying mechanisms, their initiation involves intracellular calcium signaling via calcium ion channels. The ORAI1 channel initiates melanogenesis in melanocytes, and the TRPV1 channel initiates MMP-1 production in keratinocytes in response to UV stimulation. We aimed to develop a drug that may simultaneously inhibit ORAI1 and TRPV1 activity to help prevent photoaging. We synthesized nootkatol, a chemical derivative of valencene. TRPV1 and ORAI1 activities were measured using the whole-cell patch-clamp technique. Intracellular calcium concentration [Ca2+ ] i was measured using calcium-sensitive fluorescent dye (Fura-2 AM). UV-induced melanin formation and MMP-1 production were quantified in B16F10 melanoma cells and HaCaT cells, respectively. Our results indicate that nootkatol (90 μM) reduced TRPV1 current by 94% ± 2% at –60 mV and ORAI1 current by 97% ± 1% at –120 mV. Intracellular calcium signaling was significantly inhibited by nootkatol in response to ORAI1 activation in human primary melanocytes (51.6% ± 0.98% at 100 μM). Additionally, UV-induced melanin synthesis was reduced by 76.38% ± 5.90% in B16F10 melanoma cells, and UV-induced MMP-1 production was reduced by 59.33% ± 1.49% in HaCaT cells. In conclusion, nootkatol inhibits both TRPV1 and ORAI1 to prevent photoaging, and targeting ion channels may be a promising strategy for preventing photoaging.

Skin photoaging occurs due to chronic exposure to solar ultraviolet radiation (UV), the main factor contributing to extrinsic skin aging. Clinical signs of photoaging include the formation of deep, coarse skin wrinkles and hyperpigmentation.Although melanogenesis and skin wrinkling occur in different skin cells and have different underlying mechanisms, their initiation involves intracellular calcium signaling via calcium ion channels. The ORAI1 channel initiates melanogenesis in melanocytes, and the TRPV1 channel initiates MMP-1 production in keratinocytes in response to UV stimulation. We aimed to develop a drug that may simultaneously inhibit ORAI1 and TRPV1 activity to help prevent photoaging. We synthesized nootkatol, a chemical derivative of valencene. TRPV1 and ORAI1 activities were measured using the whole-cell patch-clamp technique. Intracellular calcium concentration [Ca2+ ] i was measured using calcium-sensitive fluorescent dye (Fura-2 AM). UV-induced melanin formation and MMP-1 production were quantified in B16F10 melanoma cells and HaCaT cells, respectively. Our results indicate that nootkatol (90 μM) reduced TRPV1 current by 94% ± 2% at –60 mV and ORAI1 current by 97% ± 1% at –120 mV. Intracellular calcium signaling was significantly inhibited by nootkatol in response to ORAI1 activation in human primary melanocytes (51.6% ± 0.98% at 100 μM). Additionally, UV-induced melanin synthesis was reduced by 76.38% ± 5.90% in B16F10 melanoma cells, and UV-induced MMP-1 production was reduced by 59.33% ± 1.49% in HaCaT cells. In conclusion, nootkatol inhibits both TRPV1 and ORAI1 to prevent photoaging, and targeting ion channels may be a promising strategy for preventing photoaging.

It has been held that excessive mechanical forces to the osseous and soft tissues of the TMJ result in joint dysfunction. Understanding the stress pattern on TMJ is very important in TMJ research. But, it is very difficult to measure directly the biomechanical stress distribution in the TMJ during functional movement was studied through animal experiment or mathematical model . It was observed and compared the stress distribution occuring in the working and balancing condyle when lower right canine, lower right first molar and lower right second molar were clenched by the three dimensional finite element analysis. Also, stress distribution in the working and balancing condyles were observed and compared when 20 forward and buccal bite forces were applied to the first molar The results were as follows : 1. Stress distribution in the condyles during unilateral clenching of the first molar, second molar, canine showed no difference. In the working condyle, tensile force was concentrated on the lateral aspect of the condylar articular surface and condylar neck. And compressive force was concentrated on the anteromedial and lateral aspect of condyle. In the balancing condyle, tensile and compressive force was concentrated on the lateral aspect of the condylar articular surface and stress transmission to the temporal bone was not observed. 2. When lateral force were applied to the first molar, tensile force were concentrated on the medial aspect of the condylar neck and condylar posterior surface in working and balancing condyle. Compressive force was concentrated on the anteromedial and lateral surface of condyle and stress transmission to the temporal bone was not observed. 3. During unilateral clenching, stress in the working condyle decreased as the occlusal load moved posteriorly while the stress in the balancing condyle increased when lateral forces were applied to the first molar, the incremental amount of stress was greater than vertical load. 4. During unilateral clenching, the average balancing/ working stress ratio was 2.52. There was a greater concentration of stress in the balancing condyle. The ratio increased at the occlusal load moved posteriorly and decreased considerably when lateral forces were applied to the first molar
Animal Experimentation ; Bite Force ; Finite Element Analysis ; Joints ; Mandibular Condyle* ; Models, Theoretical ; Molar ; Neck ; Temporal Bone ; Temporomandibular Joint

No abstract available.
Membranes* ; Pregnancy* ; Rupture*

Tumor DNA content measured by flow cytometry may be a predictor in the prognosis of epithelial ovarian cancer, but the results have been inconsistent. It is recognized that these conflicting results are at least partly due to the variation of DNA content between the samples from the same patient(i.e., intratumoral DNA heterogeneity). The purposes of this retrospective study were to investigate the frequency and the nature of DNA heterogeneity in epithelial ovarian cancer and to evaluate the prognostic significance of DNA heterogenetiy itself. Thirty-two patients with stage II to IV epithelial ovarian cancer who were managed at Asan Medical Center between May 1993 and April 1996 were analysed. Measurements of the nuclear DNA content were performed on samples from primary and metastatic lesion using paraffin embedded archival tissues by Epics(Coulter Inc.) flow cytometry. In two cases, the metastatic tumor was minute and did not reveal a separable peak on repeated examination. DNA heterogeneity was defined as different ploidy pattern or difference of the DNA indices than 0.15 between primary and metastatic tumors. DNA heterogeneity was found in 11 cases(36.7%), and the number of cases with homogeneous diploid and that with homogeneous aneuploid tumor were 5(16.7%) and 14(46.7%) respectively. In evaluation of prognostic significance of DNA heterogeneity using correlation with serum CA 125 level after second course of chemotherapy and residual tumor size after cytoreductive surgery among these three groups, the patients with DNA heterogeneity were considered to show intermediate prognosis between those with homogeneous diploid and homogeneous aneuploid tumor. In conclusion, DNA heterogeneity in epithelial ovarian cancer is considerable in frequency and may have prognostic value.
Aneuploidy ; Chungcheongnam-do ; Diploidy ; DNA* ; Drug Therapy ; Flow Cytometry ; Humans ; Neoplasm, Residual ; Ovarian Neoplasms* ; Paraffin ; Ploidies* ; Population Characteristics* ; Prognosis ; Retrospective Studies