In an attempt ultrastructural study of alcohol-induced gastric mucosal change, we selected sixty Sprague-Dawley rats. The rats were administrated with 4 ml of 10% and 40% ethanol enterically and examined by light and electron microscopy. Light microscopically, the thickness of the mucus layer of both 10% and 40% ethanol groups was decreased. The antral mucosa revealed focal inflammatory infiltrates, disturbed glandular arrangements, and significant decrease of mucosal thichness and proper glands. On scanning electron microscopy, flattened or swollen mucosal epithelium and irregularly distributed gastric pits were seen in both experimental groups, and these changes were more severe in the groups of higher concentration and longer duration. On transmission electron microscopy, mitochondrial abnormalities with myelin-like materials and dilatation of endoplasmic reticulum and cytoplasmic blebs were observed. Also the mucus cells show significantly decreased mucus globules, increased fat vacuoles, and large autophagic vacuoles. These alterations were similar to those produced by ethanol in the liver and small intestine. This study indicates that, prolonged administration of ethanol induced chronic gastritis, especially chronic atrophic gastritis.
Rats ; Animals

Urethral stricture usually follows the urethral rupture and periodical urethral soundation, which is an annoying procedure for. patients, is the usual method of treatment throughout their life. A case of urethral stricture who was successfully treated with modified Cecil's Operation, is presented.
Humans ; Rupture ; Urethral Stricture*

Echocardiographic evaluation of left ventricular function permits the demonstration of preclinical diabetic cardiomyopathy. In order to define the relationship between diabetic retinopathy and precence of myocardial dysfunction, M-mode echocardiograms were recorded in three groups of diabetics ; group 1, no retinopathy, group 2, background retinopathy, group 3, proliferative retinopathy, and normal controls without evidence fo coronary heart disease. The resultant traces were digitized, and systolic and diastolic parameters were evaluated. None of parameters fo systolic function was modified. however peak velocity of posterior wall thinning was decreased in group 3(p<0.005), peak velocity of left ventricular demension increase was decreased in all three groups(p<0.005, P<0.001, P<0.001 respectively), duration of rapid thinning of posterior wall increased in group 2 and 3(p<0.001, p<0.001 respectively), and duration of rapid inflow of left ventricle was increased in group 3(p<0.005). These results indicate a diminution of myocardial compliance and relaxation in diabetics with retinopathy. It is concluded that abnormalities of left ventricular diastolic function is present in diabetics when left ventricular systolic function is normal and that more severe abnormalities of left ventricular diastolic function in diabetics with proliferative retinopathy reflect a subclinical diabetic cardiomyopathy due to small vessel disease.
Compliance ; Coronary Disease ; Diabetes Mellitus ; Diabetic Cardiomyopathies ; Diabetic Retinopathy ; Echocardiography* ; Heart Ventricles ; Relaxation ; Ventricular Function, Left*

No abstract available.
Hearing* ; Humans ; Tinnitus*

The pulmonary microvasculatures of rats were studied by injection replicas prepared from Mercox. This medium enabled us to easily obtain consistent, stable, and complete injected replicas of the pulmonary vasculature. In order to investigate the three dimensional structures of the tributaries of the bronchial artery, such as the capillary plexus and vasa vasorum, we performed a scanning electron microscopic(SEM) study of the vascular casts, using Mercox CL-2B as a media. The alveolar capillaries revealed hexagonal or pentagonal rings of vascular networks. In some areas, the vascular rings composed a square network, The bronchial tree was supplied by the bronchial arteries which form a coarse capillary extending as far as the terminal bronchioles. Occasionally the capillary plexus was connected with adjacent capillary networks in and around the alveolar walls. The walls of the pulmonary artery revealed only a single layer of the vasa vasorum, but those of the pulmonary vein were surrounded by more complicated and well developed vasa vasorum than the pulmonary arterial side. The mean diameters of the venous vasa vasorum are greater than the arterial vasa vasorum.
Rats ; Animals

This study was carried out to investigate the morphologic characteristics and localization of antigenic molecules of Pneumocystis carinii in experimentally induced P. carinii pneumonia in rats. After six weeks of administration of low protein diet and dexamethasone, Sprague-Dawley rats were sacrificed to submit lungs or bronchoalveolar lavage for the study. Monoclonal (092, 900, 902, and 904) and polyclonal (SP-D) antibodies were used for immunohistochemistry and immunoelectron microscopy (ITEM and ISEM). Immunohistochemically P. carinii organisms were well identified as clusters or separated forms in the alveolar spaces being frequently attached to the alveolar walls. Immunoelectron microscopically the adherences of gold particles were observed on the surface of all stages of the P. carinii. Occasionally positive immunogold labeling was observed in the cytoplasm of the trophozoites and on the pellicle of the intracystic bodies within the cysts. The monoclonal antibodies 092, 900, 902, and 904 reacted mainly with pellicles of P. carinii, whereas SP-D labeled on the pellicles, intracystic bodies, cytoplasms of the alveolar macrophages, and free floated surfactant material in the alveolar spaces. The immunogold particles were observed more diffusely and intensely in the cysts than in the trophozoites. These results indicate that antigen is mainly localized on the pellicles, and accumulated during development from the trophozoite to the cyst stages.
Animals ; Antibodies ; Antibodies, Monoclonal ; Bronchoalveolar Lavage ; Cytoplasm ; Dexamethasone ; Diet, Protein-Restricted ; Immunohistochemistry ; Lung ; Macrophages, Alveolar ; Microscopy, Electron ; Microscopy, Immunoelectron ; Pneumocystis carinii* ; Pneumocystis* ; Pneumonia ; Pulmonary Surfactant-Associated Protein D ; Rats ; Rats, Sprague-Dawley ; Trophozoites

This study was carried out to investigate the mechanisms of interstitial pulmonary fibrosis of rats after the intratracheal administration of bleomycin. Both lungs after bleomycin injection were examined by light and electron microscopy. The results are as follows: Light microscopically, 1 or 2 weeks after bleomycin injection acute and chronic inflammatory infiltrates and edema in the interstitium and alveolar spaces were observed. Proliferation of alveolar type II pneumocytes was also found at 4 to 6 weeks after bleomycin injection, chronic inflammatory infiltrates with interstitial fibrous thickening were noted. Electron microscopically, the number of type II pneumocytes and irregular lamellar bodies were increased and blunted microvilli were noted at 2 weeks. 4 to 8 weeks, proliferation of fibroblasts with deposition of abundant collagen fibrils in the thickened interstitium revealing irregular or collapsed alveolar spaces were observed. Based on these findings, it can be concluded that bleomycin-induced interstitial pulmonary fibrosis is considered to pass from an early acute inflammation of the interstitium and alveolar spaces to an interstitial fibroblast proliferation and collagen deposition to the length of the period after injection.
Rats ; Animals

No abstract available.
Biopsy, Fine-Needle* ; Endoderm* ; Endodermal Sinus Tumor* ; Mediastinum*

BACKGROUND AND OBJECTIVES: According to our previous study Ginkgo biloba extract (EGb 761) induces inhibition of cell proliferation and apoptosis in SCC 1483 oral cavity cancer cells. On the other hand, in lipopolysaccharide-stimulated RAW 264.7 cells, activation of mitogen activated protein kinase (MAPK) is the key event in the inhibition of inflammation by EGb 761. Therefore, we have investigated whether MAPK pathway is involved in the apoptotic process by EGb 761 in oral cavity cancer cell lines or not. SUBJECTS AND METHOD: In SCC 1483 oral cavity cancer cell lines, Western blot analysis, Fluorescence-activated cell sorter (FACS) analysis, and transient transfection using MAPK-dominant negative constructs were used. RESULTS: When SCC 1483 oral cavity cancer cell lines were treated with the concentration of 250 microgram/ml EGb 761, activation of extracellular signal-regulated kinase (ERK) and apoptosis were noted. This apoptosis was inhibited by the treatment with ERK inhibitor (PD 98059). In the transiently transfected cells by MAPK/ERK kinase 1 (MEK1)-dominant negative construct, phosphorylations of ERK and p90 ribosomal S 6 protein kinase (RSK1) were inhibited which led to the inhibition of apoptosis by EGb 761. The inhibition of apoptosis was also noted in the transfected cells by RSK1 dominant negative construct and cAMP response element binding protein (CREB)-dominant negative construct. CONCLUSION: In conclusion, the apoptosis of SCC 1483 oral cavity cancer cell lines by EGb 761 is linked to the activation of ERK and it can happen via ERK MAPK/RSK1/CREB signal transduction pathway.
Apoptosis* ; Blotting, Western ; Cell Line* ; Cell Proliferation ; Cyclic AMP Response Element-Binding Protein ; Ginkgo biloba* ; Hand ; Inflammation ; Mouth Neoplasms ; Mouth* ; Phosphorylation ; Phosphotransferases ; Protein Kinases ; Signal Transduction ; Transfection

Early correction of congenital cardiac defects has been facilitated by the use of deep hypothermia and cardiorespiratory arrest. Simple deep hypothermia has a number of advantages for infant open heart surgery, such as a quiet heart and bloodless operative field, reduced blood requirement, elimination of pulmonary and coagulation problems following cardiopulmonary bypass, elimination of cannulation, simple anesthetic technique, no neccessity of complicated facilities, and stable postoperative course. Deep ether anesthesia is the ideal agent for induction of deep hypothermia by surface cooling, especially when combined with ganglionic blocking agents in large quantities to elimiminate some of the undesirable effects of ether, thus improving and maintaining good peripheral perfusion. We have performed a total correction of TOF on March, 1979. Anesthesia was induced with intravenous thiopental and succinylcholine for intubation and maintained by a tight closed circuit system with ether. As soon as routine EKG, direct intra-arterial pressure, esophageal and rectal temperature monitoring devices were installed, slow intravenous administration of triflupromazine was followed by surface cooling. Surface cooling was done by the technique of covering the child with bags of crushed ice after placing the infant on an ice water blanket. After cooling, the intracardiac procedure was performed under circulatory occlusion and cardiac arrest, following cardioplegic infusion, for 45 minutes. After the intracardiac procedure, cardiac resuscitation and rewarming were accomplished by cardiopulmonary bypass technique. The patient recovered satisfactorily and was discharged on POD14 without any complication.
Administration, Intravenous ; Anesthesia ; Cardiopulmonary Bypass ; Catheterization ; Child ; Electrocardiography ; Ether ; Ganglionic Blockers ; Heart ; Heart Arrest ; Humans ; Hypothermia* ; Ice ; Infant ; Intubation ; Perfusion ; Resuscitation ; Rewarming ; Succinylcholine ; Tetralogy of Fallot* ; Thiopental ; Thoracic Surgery ; Triflupromazine ; Water