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Cytochalasin B (CB) treatment induces or accelerates the capping phenomenon in some cells. In Ehrlich ascites tumor cells (EATC) CB treatment apparently induced the capping of Con A binding sites as observed under a fluorescent microscope. However, electron microscopic examinations revealed that the CB treatment did not induce a rearrangement of Con A binding sites, but rather it only induced a change in cell shape. On the contrary, CB treatment inhibited the capping phenomenon induced by treatment with Con A. Electron microscopic observations may give exact information on the distribution of lectin binding sites.

Differences in urinary excretion of monochlorobenzene between rats and humans were studied. Monochlorobenzene was administered to rats and humans intraperitoneally, orally or by inhalation. Urinary p-chlorophenylmercapturic acid and 4-chlorocatechol, after hydrolysis of its conjugate, were measured. The excretion of p-chlorophenylmercapturic acid was somewhat more than that of 4-chlorocatechol in rats which were administered monochlorobenzene orally or intraperitoneally. The excretion of p-chlorophenylmercapturic acid was markedly less than that of 4-chlorocatechol in humans who received monochlorobenzene orally or by inhalation. The results indicate that the 4-chlorocatechol conjugate is a suitable index of metabolites in the urine of workers exposed to monochlorobenzene.

Two cases of malignant melanoma arising in the maxillary sinus are reported. Cytological examination of the solution obtained by local washing through the sinus puncture identified numerous melanoma cells together with melanophages. The cases were then scheduled for well-planned, preoperative treatment. The cytological criteria for diagnosing malignant melanoma are outlined, and the cytological approach is stressed as a valuable diagnostic procedure for early detection of malignant tumors and surveillance of postoperative recurrence, especially in paranasal sinuses.

The amount of S-100 protein in rat brain embolized with carbon microspheres decreased in parallel with the development of cerebral edema as judged by water content, recovering to the normal range by 24h after embolization. These results suggest the participation of S-100 protein in the permeability characterisitics of nervous system capillaries known as the blood-brain barrier.

The effects of insulin and glucagon administration on serum amino acid levels were investigated in patients with severe liver disease, since simultaneous injection of pancreatic hormones has been recently introduced as a therapeutic approach. The changes in serum amino acid concentrations, as observed 3 h after ceasing a 3 h infusion of insulin and glucagon in 500 ml glucose solution, were an elevation of serum branched chain amino acid (BACA) levels and of the molar ratio of BCAA/aromatic amino acid (AAA) levels in patients with liver cirrhosis. Similar increases of serum BCAA levels during the infusion were also observed in patients with fulminant hepatitis. The results suggest that insulin-glucagon therapy for severe liver disease has no harmful side effects at least with respect to alterations in the serum aminogram.

Pretreatment laboratory parameters were analyzed as prognostic factors in patients with small cell lung cancer. Serum lactic dehydrogenase activity, serum albumin concentration, PPD skin reaction, and peripheral lymphocyte count were of prognostic importance. When these factors were evaluated by multivariate analysis together with performance status and disease extent, lactic dehydrogenase and albumin were the most influential factors related to survival.

The applicability and accuracy of isotachophoresis in measuring the concentrations of some of the intermediates of red cell metabolism during blood bank storage in acid-citrate-dextrose preservative was assessed. Preparative treatment consisted of washing with isotonic sucrose solution and centrifugation to remove serum, but white cells and platelets were not separated out from red blood cells. The results for 2,3-diphosphoglycerate, ATP, inorganic phosphate and lactate were also confirmed enzymatically. The technique had good reproducibility (variation less than 3%) and was extremely convenient compared to traditional enzyme assays of the same components. It enabled simultaneous measurement of components with concentrations greater than 1 mumole/red blood cell.

Paraquat is a broad spectrum herbicide known to be highly lethal to man and animals. Its toxicity is characterized by acute lung injury. Paraquat produces such toxic effects through the generation of the superoxide anion according to one proposed mechanism. The present experiment, methemoglobin formation was demonstrated after incubation of oxyhemoglobin with paraquat. The generation of the superoxide anion through the interaction of oxyhemoglobin with paraquat was suggested by chemiluminescence of luminol. Superoxide dismutase (SOD) and catalare inhibited methemoglobin formation. The generation of the superoxide anion is discussed in regard to methemoglobin formation by paraquat.

A total of 19 cases with bone tumors, including six osteosarcomas. three giant cell tumors of bone, one malignant fibrous histiocytoma, four nonossifying fibromas, four chondromas and one chondrosarcoma, were examined as to enzyme histochemistry; the enzymes consisted of alkaline phosphatase (ALPase), acid phosphatase (ACPase), nonspecific esterase (NSE), adenosine triphosphatase (ATPase), 5'-nucleotidase (5'-Nucl) and beta-glucuronidase (beta-Gl). Osteosarcoma was strongly positive for ALPase followed by 5'-Nucl. Giant cell tumor, malignant fibrous histiocytoma and nonossifying fibroma showed enzyme histochemistry similar to each other: multinucleated giant cells and round cells in these tumors were strongly positive for ACPase, NSE, ATPase and 5'-Nucl simulating osteoclasts and histiocytes, whereas spindle cells were positive for ATPase and 5'-Nucl in their cytoplasm and weakly positive for ACPase. Chondroma and chondrosarcoma were focally positive for ACPase and NSE; the ACPase was sensitive to tartaric acid treatment. These observations showed that ALPase activity is very characteristic to osteosarcoma, and is useful for its diagnosis. From enzyme histochemistry, giant cell tumor, malignant fibrous histiocytoma and nonossifying fibroma can be regarded as a histiocyte-derived tumor of bone in contrast to osteosarcoma and cartilaginous tumors.

The diameter of the mitral annulus as measured on the long axis by two-dimensional echocardiogram was found to correlate well with the size of the sewing ring used to replace the mitral valve in 35 consecutive patients. The size of the prosthesis which was used could be predicted within 1 mm of error in 83% of the mitral stenosis (MS) patients and in 76% of the mitral regurgitation (MR) patients in the study. Preoperative echocardiographic estimation of the size of the mitral valve annulus and prediction of the sewing ring size of the prosthetic valve used could reduce the incidence of valve prosthesis-patient mismatch.

Serum alpha-fetoprotein (AFP) concentrations were serially determined during the period following cessation of alcohol on thirty-five medical and psychiatric patients with histories of long-term excess drinking. In all except two cirrhotics with posttransfusion hepatitis and hepatocellular carcinoma, all AFP determinations for more than 2 months following abstinencewere negative(<40ng/ml). The results suggest that AFP elevations after abstinence from alcohol should raise the question of associated viral hepatitis or hepatoma in alcoholics.

Hepatic ornithine decarboxylase and aniline hydroxylase activities increased as early as 6h after a single dosing of azathioprine tomale rats and reached maximum levels at the 12th h after the treatment. However, aniline hydroxylase activity dropped to levels mu lower than the cintrols 48 h following azathioprine treatment. The results are discussed with regard to the role of azqathioprine during the promotion of hepatocarcinogenesis.

The activity and properties of cholinesterase (ChE) of the motor endplate and its fractions were studied in isolated human skeletal muscle. This preparation was used since the ChE activity of the membrane preparation was localized only in the motor endplate. The endplate ChE was stable in the isolated membrane for 4 weeks at 4 degrees C. The specific activity of the extracted ChE of human muscle membrane was 29.6% higher than that of the original membrane. Studies with specific substrates and ChE inhibitors indicated that most of the ChE of human muscle membrane and its fractions was acetylcholinesterase, and that the minor component was pseudocholinesterase. A Michaelis-Menten constant of 3.82 mM was estimated in the endplate ChE, and 0.88 mM in the extracted ChE of the endplate. The extracted human endplate ChE was separated into three fractions by Sephadex G-200 chromatography, and into two fractions by acrylamide gel electrophoresis.

<p>plasma tyramine concentrations ewre abnormally high in cirrhotic patients with hepatic encephalopathy. Oral administration of berberine hydrochloride corrected hyperyraminemia in cirrhotics and also prevented the elevation of plasma tyramine levels following the oral tyrosine load, probably because of berberine-inhibition of bacterial tyrosine decarboxylase in the intestine. This is a new approach as Anti-amine therapy for cirrhotic patients</p>

The microvasculature of peripheral nerves in dog and human samples was studied by an injection replica scanning electron microscope (SEM) method. The three-dimensional relationship of epineural and intraneural vessels was well demonstrated by this method. Epineural vessels were made of both longitudinal arterioles and venules and also a close meshwork of capillaries. In the intraneural microvasculature, longitudinal arterioles and venules made up the perineural vessels, and grouped capillaries corresponded to the fine vasculature of intrafascicular vessels. Between epineural and intraneural vessels, there was little anastomosis but nutrient arteries ran through the epineural vasculature into the intraneural vessels. There was little interconnection of vessels among the intraneural vasculature. It was postulated that the close meshwork of the epineural layer can resist pressure from outside the peripheral nerves but that longitudinal venules seemed to be affected by pressure and tension at the localized area.

A chronic epileptic focus not resulting in generalized convulsions was induced by a microinjection of FeCl3 solution into the left anterior cortex of rats. Cyclic AMP accumulation in response to adenosine was examined in incubated slices from the cerebral cortex of animals that showed bilateral spike and slow wave complex in an electrocorticogram (ECoG) 30 to 60 days after the microinjection. Cyclic AMP accumulation after incubation with adenosine was most marked in slices from the left anterior quadrant of the cortex including a FeCl3-injected site. A medium response was observed in both the left posterior and the right anterior quadrants, but little or no response in the right posterior quadrant of the cortex.

The local graft-versus-host (GvH) reaction in (C57BL/6 X BALB/c) F1 hybrid mice, assayed by popliteal lymph node enlargement, was specifically depressed by an injection of parental lymphocytes mixed with spleen cells from F1 mice pretreated with the same parental lymphocytes. Suppressor activity of CBF1 spleen cells was obtained 7 days after inoculation of parental lymphocytes, and peaked on day 10. The suppressive activity was induced by only spleen cells from CBF1 which was inoculated Balb/c lymphocytes, but not C57BL/6 lymphocytes. The lymphocyte subpopulation responsible for the suppressive activity was noticed in T cell population.

Unilateral cystic inner ear anomalies were diagnosed in two siblings, a 9 year old boy and a 6 year old girl. X-ray examination of the temporal bone was performed, together with audiological examinations and vestibular function tests. The common tomographic X-ray findings consisted of an enlarged solitary sac type deformity of the vestibule with narrowing of the internal auditory canal, severe hypoplasia of the anterior semicircular canal and no visualized cochlea. Pure-tone audiometry revealed severe mixed type of hearing loss in the right ear in both children. The test for vestibular function showed no response to caloric testing.

Volume-time (V-T) and flow-volume (F-V) curves were measured in all the subjects of nonsmoking young males (mean value 26.3 yrs. of age), healthy and asthmatics. Eleven parameters of pulmonary function tests composed of two V-T, six F-V, and three mean time constant (MTC) parameters, were calculated from the curves. These parameters were used in the two analyses through the all possible selection procedure (APSP) discriminating between healthy adults and mild asthmatics and also between healthy and moderate. Flow rate at 75% of FVC (V75) proved to be the most useful parameter and V50 the next best in both analyses. The probability of misclassification using all eleven parameters was 19.64% in the analysis of healthy adults and mild asthmatics, and 4.29% in the analysis of healthy adults and moderate asthmatics. There was a little difference in the parameters selected at every step. The discriminant analysis proved that the flow-volume patterns were different according to the severity of bronchial asthma. Thus flow-volume recognition was considered to be important in analyzing the severity of bronchial asthma.