No abstract available.
Oncogene Proteins* ; Oncogenes* ; Teratocarcinoma*

OBJECTIVES: Recent basic science studies continue to further our understanding of the fundamental mechanisms that likely underlie the therapeutic benefits of hyaluronan derivatives. The purpose of this study is to elucidate the effects of hyaluronan on ATDC5 proliferation and differentiation. METHODS: ATDC5 cells derived from mouse teratocarcinoma have the capacity to differentiate along a number of connective tissue pathways and are an attractive source of chondrocyte precursor cells. In this study, hyaluronan influencing ATDC5 chondrogenesis were investigated using an bone block culture system. The cell proliferation was analyzed by MTT assay. To validate ATDC5 differentiation we studied ALP activity, collagen content and western blot of Hsp40. RESULTS: In cell proliferation, ATDC5 cells didn't show significant difference between controls and hyaluronan-treated cultures. But hyaluronan induced ALP activity and increased collagen accumulation. Hyaluronantreated ATDC5 cells expressed Hsp40 mRNA and protein within 24 hours. CONCLUSIONS: Hyaluronan-induced chondrogenic differentiation was not associated with ATDC5 cell proliferation. Hyaluronan-induced Hsp40 in cells can protect the cell function from damaged protein. These data provide new insights into regulatory mechanism defining pharmacological effects of hyaluronan.
Animals ; Blotting, Western ; Cell Proliferation ; Chondrocytes* ; Chondrogenesis ; Collagen ; Connective Tissue ; Hyaluronic Acid* ; Mice ; RNA, Messenger ; Teratocarcinoma

Spatially and temporally programmed expression of the Hox genes along the antero-posterior (A-P) axis is essential for correct pattern formation during embryonic development. An accumulating body of evidence indicates the pivotal role of spatial chromatin organization for the coordination of gene regulation. Recently, chromosome conformation capture (3C) technique has been developed and opened a new way to study chromosomal interactions in the nucleus. In this study, we describe 3C method we applied in F9 embryonic teratocarcinoma cells and demonstrate that the chromosomal interactions at Hox loci are successfully detected. Interestingly, at Hoxc loci, the abundance of intrachromosomal interactions with neighboring fragments was drastically decreased when the genes are expressed. These results indicate the possibility of the dynamic pattern of chromosomal interaction in association with the transcriptional regulation of Hox genes.
Axis, Cervical Vertebra ; Chromatin ; Embryonic Development ; Female ; Gene Expression ; Genes, Homeobox ; Pregnancy ; Teratocarcinoma ; Transcriptional Activation

Many drugs can result in a variety of pathologic reactions in the lung, especially the cytotoxic drugs. Amongcytotoxic drugs bleomycin is a prototype. Bleomycin-related pulmonary toxicity is usually known as dose-dependent and can be enhanced with concurrent oxygen therapy, irradiation, or other chemotherapeutic agents. The incidence of bleomycin-induced pulmonary toxicity has been reported as varying from 2 to 46%, and 1% of fatal lung disease. We describe the radiographic and HRCT findings of bleomycin-related pulmonary toxicity developed in two patients: one in ovarian teratocarcinoma, the other malignant lymphoma patient. Chest radiographs and HRCT of these patients showed ground-glass opacities, consolidation, linear and reticular opacities, and interlobular septal thickening. These abnormalities were bilateral, and symmetrical and were found predominantly in the area of mid-and lower-lung zone.
Bleomycin ; Humans ; Incidence ; Lung Diseases ; Lung* ; Lymphoma ; Oxygen ; Radiography, Thoracic ; Teratocarcinoma

The relative rarity and anatomical position of presacral tumors may lead to difficulty in diagnosis and surgical treatment. The clinical features and surgical approach of 4such tumors(teratocarcinoma 1, endodermal sinus tumor 1, chordoma 1, neurilemmoma 1) have therefore reviewed. Low back pain or sacral pain was present in 3patients although all tumors were palpable on rectal examination. Surgical resection was carried out using the posterior transverse approach in Kraske's prone position. Complete surgical excision was performed in 3cases(chordoma, teratocarcinoma, neurilemmoma) and incomplete excision in 1 case(endodermal sinus tumor). A review of literature concerning these tumors and the surgical approach are presented.
Chordoma ; Diagnosis ; Endodermal Sinus Tumor ; Low Back Pain ; Neurilemmoma ; Prone Position ; Teratocarcinoma

Follow-up study was made on 14 patients of testicular who were treated at Severance hospital since 1972. The results are summarized as follows: 1. Among the 14 cases of testicular tumors, there were 7 cases of seminoma and 7 cases of nonseminomatous germ cell tumors(3 cases of embryonal cell carcinoma, 1 case of teratoma, 1 case of teratocarcinoma, 1 case of malignant lymphoma and 1 case of reticulum cell sarcoma.) 2. The median survival periods of 7 patients of seminoma was 35 months(range 6 to 113 months). the median survival periods of 7 patients of nonseminomatous germ cell tumor was 25 months (range 7 to 102 months). 3. The clinical stage of patient was stage A in 9, B in 3 and C in 1, The median survival periods of clinical stage A was 27.3 months, B in 51.3 months and C in 8 months. 4. Preoperative evaluation of serum AFB & HCG was made by radioimmunoassay. Only 1 case of non-seminomatous germ cell tumor had elevated serum AFB, but 2 cases of seminoma & 1 case of non-seminomatous germ cell tumor had elevated serum HCG. 5. The average survival periods according to treatment modalities was 40 months in radiation therapy(6 cases of seminoma), 10 months in chemotherapy only(3 cases of non-seminomatous germ cell tumor), 14 months in RPLND(3 cases of non-seminomatous germ cell tumor) and 16 month in RP LND with chemotherapy(2 cases of nonseminomatous germ cell tumor).
Drug Therapy ; Follow-Up Studies* ; Germ Cells ; Humans ; Lymphoma ; Neoplasms, Germ Cell and Embryonal ; Radioimmunoassay ; Reticulum ; Seminoma ; Teratocarcinoma ; Teratoma ; Testicular Neoplasms

The first case of testicular teratocarcinoma in Korea, found in 24 year old service man was reported. Complication of the metastases to various organs, gynecomastia and hydrocele was seen at the first examination and simple orchiectomy and delayed x-ray deep therapy were not effective to survive this case. The patient died 3 months after the affliction. Autopsy revealed matastases were to lung, spleen, lower poles of both Kidneys, mediastinal and lumbar paraaortic lymph nodes and histopathological examination showed the teratocarcinoma composed of seminoma, embryonic carcinoma and chorioepitheliomatous elements. Additionally, 13 cases of testis tumors reported in literatures of recent years in-country have peen reviewed.
Autopsy ; Gynecomastia ; Humans ; Kidney ; Korea ; Lung ; Lymph Nodes ; Male ; Neoplasm Metastasis ; Orchiectomy ; Seminoma ; Spleen ; Teratocarcinoma* ; Testis* ; Young Adult

Forty-six patients with testicular tumor were treated at our hospital From 1971 to 1990. There were 25 children (13 yolk sac tumors, 10 teratomas, 1 teratocarcinoma and 1 acute lymphocytic leukemia) and 21 adults(11 seminomas, 4 non-seminomatous germ cell tumors and 6 non-germ cell tumors). Testicular lumors with clinical evidence of cryptorchidism were 4 seminomas and 2 non seminomts. Serum AFP or HCG were observed in 8 patients of 8 seminomas, 1 of 5 teratomas, 7 of 9 yolk sac tumors and 4 or 5 non-seminomatous germ cell tumors(NSGCT). Four stage 1 seminomas and 1 NSGCT were tumor free of 2 years after radical orchiectomy and 2 of 4 seminomas were received prophylactic radiotherapy. Two stage II seminomas and 1 NSGCF treated with PVB nomas and radiotherapy were tumor free of 2 years but stage III seminomas and NSGCT died during chemotherapy. All stage 1 yolk sac tumors and teratomas were tumor Free of 2 years by surveillance only following radical orchiectomy but stage II and III yolk sac tumors died during chemotherapy. We have suggested that poor result of stage III testicular tumors can be attributed to few cases with more aggressive and more toxic chemotherapy in the unfavorable prognosis disease(advanced extent) and poor compliance of patient of therapy.
Child ; Compliance ; Cryptorchidism ; Drug Therapy ; Endodermal Sinus Tumor ; Germ Cells ; Humans ; Male ; Neoplasms, Germ Cell and Embryonal ; Noma ; Orchiectomy ; Prognosis ; Radiotherapy ; Seminoma ; Teratocarcinoma ; Teratoma ; Testicular Neoplasms ; Testis*

A Clinical observation was made of 20 cases of testicular tumor admitted to the Department of Urology, Kei-myung University Medical College and Hospital during the period from May 1971 through July 1982. Among the 20 cases, 4 cases were transferred to this department for further treatment and tumor recurrence following orchiectomy. The results of clinical observation are summarized as below: 1. Age distribution was between 9 months and 57 years old, showing the highest incidence below 10 years old (65%). 2. There were 7 cases of teratoma, 5 cases of seminoma, 5 cases of embryonal carcinoma, 1 case of teratocarcinoma and 2 cases of metastatic neoplasm. 3. Stages of primary germ cell tumors; stage A 6 cases, stage B 2 cases and stage C 3 cases. 4. These patients were managed by surgery, radiation therapy and chemotherapy according to the histologic findings and clinical stages.
Age Distribution ; Carcinoma, Embryonal ; Child ; Drug Therapy ; Humans ; Incidence ; Middle Aged ; Neoplasms, Germ Cell and Embryonal ; Orchiectomy ; Recurrence ; Seminoma ; Teratocarcinoma ; Teratoma ; Urology

PURPOSE: We reviewed clinical features and survival rates of nonseminomatous germ cell testicular tumors(NSGCTs) and analyzed pathological risk factors of relapse in stage I group under surveillance program. MATERIALS AND METHODS: Forty one patients were treated for primary NSGCTs from February 1983 to April 1998. 20(48.8%) patients were stage I and 19 of them were followed up under surveillance program after orchiectomy and 1 underwent orchiectomy and adjuvant therapy(RPLND and PVB chemotherapy). 11(26.8%) were stage II and 10(24.4%) stage III and all stage II and III patients underwent orchiectomy and adjuvant therapy. Statistical analysis with Fisher`s exact test was performed to identify that pathological risk factors affected relapse rate. RESULTS: Mean age at diagnosis was 26 years(range 16-47) and mean follow-up period was 58 months(range 5-163). According to histopathological types, embryonal carcinoma, teratoma, teratocarcinoma and mixed type represented 19.5%, 26.8%, 7.3% and 46.3%, respectively. Among 41 patients, 33 showed significant elevation of tumor markers at diagnosis. The 5-year survival rates of stage I, II and III were 95%, 80% and 56%, respectively and overall 5-year survival rate was 82%. Among stage I patients under surveillance program, there was statistically significant increase of relapse rate in the patients with pathological risk factors(presence of embryonal elements, local stage T2 or higher, presence of lymphovascular invasion) as compared to those without. CONCLUSIONS: In stage I NSGCT patients, if there are pathological risk factors after orchiectomy, aggressive therapy such as early retroperitoneal lymph node dissection or chemotherapy is selectively needed.
Carcinoma, Embryonal ; Diagnosis ; Drug Therapy ; Follow-Up Studies ; Germ Cells* ; Humans ; Lymph Node Excision ; Orchiectomy ; Recurrence ; Risk Factors* ; Survival Rate* ; Teratocarcinoma ; Teratoma ; Biomarkers, Tumor