PURPOSE: Insulin-like growth factor-I (IGF-I) is an important mitogen in many types of malignancies. The purpose of this study was to evaluate the role of the IGF system on cell proliferation and cell death in mouse lung cancer cell lines (3LL). MATERIALS AND METHODS: Northern analysis was performed in 3LL cells. We evaluated the phosphorylation of IGF-I receptor (IGF-IR) with IGF-I stimulation. MTT assay was performed after treating 3LL cells with IGF-I and the treatment effect on cell death in the presence of anticancer drug was investigated. RESULTS: Northern analysis revealed the presence of IGF-I and IGF-IR mRNA expression in 3LL cells. IGF-I increased cellular proliferation in serum free media. IGF-I also stimulated the tyrosine phosphorylation of two proteins: one, with a molecular mass of 95 kDa, was the beta-subunit of IGF-IR; the other, with an approximate molecular mass of 185 kDa, was originally identified as the insulin receptor substrate-I (IRS-I). IGF-I at a low concentration inhibited the cell death induced by adriamycin. CONCLUSION: IGF-I, a mitogen through the phosphorylation of the IGF-IR beta-subunit, acts as a survival factor to inhibit cell death. Therefore, these findings suggest that IGF-I and IGF-IR are involved in both the cell proliferation and cell death associated with cancer cell growth.
Animals ; Cell Death ; Cell Line ; Cell Proliferation ; Culture Media, Serum-Free ; Doxorubicin ; Insulin-Like Growth Factor I ; Lung Neoplasms* ; Lung* ; Mice* ; Phosphorylation ; Receptor, IGF Type 1 ; Receptor, Insulin ; RNA, Messenger ; Tyrosine

BACKGROUND: IGF-I is an important mitogen in many types of malignancies. Tumors also express many IGF binding proteins, which modulate IGF action. The purpose of this study was to evaluaste the effect of IGF-I and IGFBP on cell proliferation in mouse lung cancer cells (3LL). METHODS: The cellular proliferation of 3LL with the treatment of growth factors was evaluated using MTT assay. Western ligand blot was performed in order to determine whether 3LL cells secrete IGFBPs and we evaluated the effect of IGFBP on cellular proliferation. RESULTS: The treatment of 3LL cells with IGF-I increased cellular proliferation in a serum free media. Western ligand blot of conditioned medium of 3LL with 125I-IGF-I demonstrated one single major band with an estimated molecular mass of 24 kDa. This band was identified as IGFBP-4 with immunoblot analysis using antisera. The addition of anti-IGFBP-4 antibody to abrogate the effect of IGFBP-4 resulted in increased cellular prolife ration suggesting that IGFBP-4 inhibits cell growth. CONCLUSION: IGF-I increases cellular proliferation, however the secreted IGFBP- 4 has an ingibitory function on cell growth in 3LL. These findings suggest that IGF-I and IGFBP are involved in the cell proliferation.
Animals ; Carrier Proteins* ; Cell Proliferation ; Culture Media, Conditioned ; Culture Media, Serum-Free ; Immune Sera ; Insulin-Like Growth Factor Binding Protein 4 ; Insulin-Like Growth Factor Binding Proteins ; Insulin-Like Growth Factor I ; Intercellular Signaling Peptides and Proteins ; Lung Neoplasms* ; Lung* ; Mice*

Effects of thoracentesis on thoracic impedance and cardiac performance were studied in patients with uncomplicated unilateral tuberculous pleural effusion. The speed of the removal of the pleural effusion in thoracentesis was essentially similar to that of a generally used for therapeutic purpose in daily practice. Thoracic impedance was measured in 23 cases before, 4 and 10 minutes after thoracentesis to the amount of pleural effusion aspirated was observed. In 11 cases out of 23, the changes in cardiac performance as assessed by stroke volume, cardiac output, heart rate, heather index and ratio of pre-ejection period to left ventricular ejection time(PEP/LVET) were observed 4 minutes after 150 ml to 1,000 ml of thoracentesis. In these cases, stroke volume, cardiac output, and Heather index were determined from impedance cardiograms, and PEP/LVET from mechanocardiograms recorded simultaneously with the former. A significant increase in thoracic impedance was observed both 4 and 10 minutes after thoracentesis. There was a slight but a significant correlation between the changes in thoracic impedance and the amount of pleural fluid aspirated only 4 minutes after thoracentesis. Thoracentesis showed no consistent influence on cardiac performance as reflected to stroke volume, cardiac output, heart rate, heart index and PEP/LVET. These facts suggest that measurement of thoracic impedance may be a useful method reflecting alterations in pleural fluid volumes, particularly when it occurs in a relatively short period of time, and the effects of thoracentesis of less than one liter on the cardiac functions as determined by the above-mentioned parameters were variable.
Cardiac Output ; Electric Impedance* ; Heart ; Heart Rate ; Humans ; Pleural Effusion ; Stroke Volume

Double primary cancer is defined as the case of primary malignant tumors, which must be arise in different sites and have a different histologic appearences. The number of reported cases of double primary malignant tumors has increased in recent and the occurrence of multiple primary cancers in the same individuals is one of the interesting subjects for investigation and research in relation to the carcinogenic mechanism and/or genetic factors. We have experienced a case with double primary malignant tumors of different site origins such as stomach adenocarcinoma and rectal adenocarcinoma, which were diagnosed by biopsies with gastro and colono fiberscopy. For its great rarity, we report this case with review of literatures.
Adenocarcinoma ; Biopsy ; Rectum* ; Stomach*

No abstract available.
Eosinophilic Granuloma* ; Eosinophils* ; Lymph Nodes*

No abstract available.
Lung Neoplasms* ; Lung* ; Neoplasm Metastasis* ; Toes*

No abstract available.
Bronchoscopes*

No abstract available.
Lasers, Solid-State* ; Papilloma*

In situ follicular lymphoma is a newly defined entity among the lymphoid neoplasms and is defined as architecturally normal-appearing lymph nodes and other lymphoid tissues that have one or more follicles that demonstrate bcl-2 overexpressing centrocytes and centroblasts, with or without a monomorphic cytologic appearance suggestive of follicular lymphoma. Here we present a case of in situ follicular lymphoma diagnosed during the follow-up after a complete response to the treatment of lymphocyte-rich classical Hodgkin's lymphoma. In our case, because only a few germinal centers contained bcl-2 overexpressing cells, we missed the diagnosis of in situ follicular lymphoma in the initial histological examination. We could establish the diagnosis only after performing bcl-2 immunostaining in the sequential biopsy. Therefore, we recommend that careful histological examination along with bcl-2 immunostaining is needed in patients with suspicious clinical findings.
Biopsy ; Follow-Up Studies ; Germinal Center ; Hodgkin Disease ; Humans ; Lymph Nodes ; Lymphoid Tissue ; Lymphoma ; Lymphoma, Follicular ; Precancerous Conditions

We report the case of a 56-year-old man with a prostatic mass that extended into the rectal mucosa. He experienced constipation and anal bleeding for 6 months. He underwent surgical ablation for an approximately 5-cm, benign, subepithelial cystic mass in the rectum, which was adjacent to a 5-cm solid mass located on the prostatic gland seen on computed tomography and magnetic resonance imaging (MRI) of the pelvis. One year after the surgery, the patient had recurrent anal bleeding with difficulty defecating. The pelvic MRI scan showed a solid mass with heterogeneous enhancement that was compressing the rectum. The sigmoidoscopic exam showed a 4-cm mass protruding through the anterior rectal mucosa 7-cm above the anal verge. Ultra-low anterior resection with ileostomy and prostatectomy was performed for curative resection of the mass with extension into the rectum. However, the pathologic report showed massive benign prostatic hyperplasia involving the rectum, but not penetrating into the rectal mucosa. The patient did not complain of any symptoms including constipation and anal bleeding, until 18 months after the surgical resection. This is the first reported case of benign prostatic hyperplasia mimicking a rectal submucosal tumor in a patient presenting with anal bleeding and constipation.
Constipation ; Gastrointestinal Hemorrhage ; Hemorrhage ; Humans ; Ileostomy ; Magnetic Resonance Imaging ; Middle Aged ; Mucous Membrane ; Pelvis ; Prostatectomy ; Prostatic Hyperplasia* ; Rectal Neoplasms ; Rectum