No abstract available.
Hemorrhoidectomy* ; Mucous Membrane*

No abstract available.
Animals ; Anoxia* ; Brain* ; Dopamine* ; Norepinephrine* ; Rats* ; Serotonin*

It was well known that atrial myocytes systhesize atrial natriuretic peptide[ANP], and secrete it into the atrial lumen through the atrial endocardium. But the mechanism for regulation of ANP secretion has not been clearly elucidated, because there was little information of the atrial morphology concerning basal lamina. Basal lamina is surmised as one of barriers that control the movement of ANP, a large molecule. This study was attempted to elucidate the morphological characteristics of basal lamina and connective tissue fibers of atrial endocardial layer by scanning electron microscopy. Basal lamina was exposed by removal of the overlying endothelium. This was achieved by using OsO4 maceration, immersion in aqueous boric acid or EDTA treatment. After removal of the endothelial cell, the specimens were exposed to ultrasonic vibration in case of need. The external surface of basal lamina showed a fairly smooth appearance on the whole, although a few irregular folds are often encountered. Fenestrations, 0.1-1 micrometer in diameter, were randomly observed on the basal lamina, and they were circular to oval in shape. Margin of fenestrations was somewhat distinct and some was divided into two parts by linear structures. The structural differences of fenestrations between right and left atria were not found. The fibroreticular lamina under the basal lamina was revealed by removal of the endothelial cells and their basal lamina. This layer was consisted of interwoven fine fibers. These fine fibers were repeatedly divided and fused, forming reticular network. Some fine fibers connected with basal lamina. Some connective tissue fibers below fibroreticular layer were collected into thick bundles running parallel to myocytes. Above results may serve as a basis for the physiological and morphological studies of atrium.
Animals ; Atrial Natriuretic Factor ; Basement Membrane* ; Connective Tissue ; Edetic Acid ; Endocardium* ; Endothelial Cells ; Endothelium ; Immersion ; Microscopy, Electron, Scanning ; Muscle Cells ; Rats* ; Running ; Ultrasonics ; Vibration

In glaucoma filtering surgery, we conducted subconjunctival injection of Mitomycin-C(MMC) 12 hours before and after surgery, and examined histologic findings of the filtering bleb, and condition of the anterior chamber which ensued after the injection. We divided 15 full-grown rabbits into three groups, and for each group, administered subconjunctivally 0.1cc of 0.002%, 0.004%, and 0.008% MMC, respectively. The subconjunctival injection of MMC before surgery was given to the right eye and post-surgical injection to the left, and we examined the results 1, 2, 4, 7, and 14 days after the administration.In conclusion, subconjunctival injection of MMC 12 hours before glaucoma filtering surgery is shown to be more effective than the injection after the surgery.
Anterior Chamber ; Blister* ; Filtering Surgery* ; Glaucoma* ; Mitomycin* ; Rabbits

BACKGROUND: It has been reported that Cortex mori ( Morus alba L, Sangbaikpi ; CM ), the root bark of mulberry tree, plays a role in inhibiting mast cell activation. Human seminal plasma ( HSP ) modulates immune systems and activates rat peritoneal mast cells ( RPMC ). However, the inhibitory agents of HSP - induced mast cell activation have not been disclosed yet. OBJECTIVE AND METHOD: This study was undertaken to determine the effects of CM on HSP-induced mast cell activation by morphologic and functional methods. Morphological changes of RPMC by HSP alone or CM plus HSP were observed with the inverted light microscope. And the amounts of histamine and calcium were measured by radioisotopic enzymatic histamine and radioisotopic calcium assays. RESULTS: By inverted microscopy, HSP-induced RPMC degranulation occurred in a dose-dependent fashion. After pretreatment of RPMC with CM, there was no HSP-induced degranulation. Degranulation index (DI) of RPMC treated with Hanks balanced salt solution (HBSS), CM or HSP was 7.0+/-4.3, 9.0+/-6.2, 56.5+/-16.9, respectively. After pretreatment of RPMC with CM, HSP-induced DI was 11.0 +/-7.1. These results indicate that CM inhibited HSP-induced degranulation of RPMC. HSP-induced RPMC histamine release (HR) was dose-dependent. HR of RPMC treated with HBSS, CM or HSP was 0.18+/-0.10, 0.30+/-0.19, 4.48+/-0.86 ug/ml, respectively. After pretreatment of RPMC with CM, HSP-induced HR was 0.52+/-0.21 ug/ml. These results indicate that CM inhibited HSP-induced HR from RPMC. Intracellular calcium level ( ICL) of RPMC was also increased according to the concentration of HSP. ICL of RPMC treated with HBSS, CM or HSP was 6.1+/-1.0, 9.0+/-2.1, 30.2+/-6.5 pmole, respectively. After pretreatment of RPMC with CM, HSP-induced ICL of RPMC was 11.6 +/- 3.3 pmole. These results indicate that CM inhibited HSP-induced calcium uptake of RPMC. CONCLUSION: From these results, it is suggested that CM contains some substances which inhi-
Animals ; Calcium ; Histamine ; Histamine Release ; Humans* ; Immune System ; Mast Cells* ; Microscopy ; Morus ; Rats* ; Semen* ; Trees

No abstract available.
Ductus Arteriosus* ; Indomethacin*

This study was carried out to observe the ultrastructure of tongue mast cells in frog, Bombina orientalis. In the light microscopy, mast cells were round, oval, spindle-like and irregular shape and occasionally had one or more tail-like long cytoplasmic processes. Mast cells had many red granules stained with toluidine blue in the cytoplasm. In the electron microscopy, mast cells had membrane-bounded granules and poorly developed organelles. The granules were composed of two parts, low and dense electron density. In high magnification the dense part in the middle region of granule had honey comb-like crystalline structure.
Anura* ; Crystallins ; Cytoplasm ; Honey ; Mast Cells* ; Microscopy ; Microscopy, Electron ; Organelles ; Tolonium Chloride ; Tongue*

No abstract available.
Animals ; Humans ; Infant, Newborn* ; Intestines* ; Rats*

No abstract available.
Adult* ; Dental Pulp Cavity* ; Humans ; Incisor*

Renal cell carcinoma, intimately associated with a sarcomatous component, is a rare malignant renal tumor. There is disagreement whether these represent true sarcomas or are sarcomatoid metaplasia. Therefore, this sarcomatous component is at times still a troublesome problem for pathologists. In March, 1986, we experienced a case of renal cell carcinoma associated with rhabdomyosarcomatous component in 47 year-old woman who had a rapidly enlarged, palpable abdominal mass. Grossly, a spherical renal cell carcinoma, 17x14x10 cm, in upper and middle portions of the right kidney showed extension through the renal capsule into the perirenal fat. Area of myxoid change was evident in the reanl cell carcinoma, with extensive hemorrhagic necrosis. Microscopically, in the myxoid area, there was malignant spindle cell proliferation in which many rhabdomyoblasts showing distinct cross striation could be demonstrated. This rhabdomyosarcomatous component intermixed with renal cell carcinoma of clear cell type could be also identified in the focal area.
Female ; Humans