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E Kajiwara

Publications and source records attributed to E Kajiwara.

At least 19 recordsLinked to original sources
PubMed1996

Parallel evolution in radiation of Ohomopterus ground beetles inferred from mitochondrial ND5 gene sequences.

Molecular phylogenetic analyses using mitochondrial NADH dehydrogenase subunit 5 (ND5) gene sequences representing all 15 species and the majority of subspecies or races of the Ohomopterus ground beetles from all over the Japanese archipelago have uncovered a remarkable evolutionary history. Clustering of the species in the molecular phylogenetic tree is linked to their geographic distribution and does not correlate with morphological characters. Taxonomically the "same" species or the members belonging to the same species-group fall out in more than two different places on the ND5 tree. Evidence has been presented against a possible participation of ancestral polymorphism and random lineage sorting or of hybrid individuals for the observed distribution of mitochondrial DNA haplotypes. The most plausible explanation of our results is that parallel evolution took place in different lineages. Most notably, O. dehaanii, O. yaconinus, and O. japonicus in a lineage reveal almost identical morphology with those of the "same" species (or subspecies) but belonging to the phylogenetically remote lineages.

Animals↗
PubMed1995

Evidence for an immunological pathogenesis of thrombocytopenia in chronic liver disease.

OBJECTIVES: To elucidate the role of platelet-associated IgG (PA-IgG) in the mechanism of thrombocytopenia associated with chronic liver disease. METHODS: Platelet count in blood, PA-IgG, and scintigraphic spleen/liver ratio as a marker of splenomegaly was examined in 214 individuals, including 16 controls showing nonspecific reactive change in liver biopsy and 198 patients with chronic liver disease. RESULTS: The mean blood platelet count decreased significantly according to severity of liver disease, from control to liver cirrhosis. PA-IgG levels increased significantly in relation to severity of liver disease, as did spleen/liver ratio. In chronic hepatitis or liver cirrhosis, an inverse correlation was found between platelet counts and PA-IgG levels. An inverse correlation was also observed between platelet count and spleen/liver ratio in liver cirrhosis. The splenic embolization resulted in a significant rise in platelet count and a significant fall in PA-IgG in the 14 cirrhotic patients. CONCLUSIONS: These results may give support to evidence for an immunological mechanism mediated by PA-IgG for the thrombocytopenia occurring in chronic liver disease. In the case of liver cirrhosis, this mechanism would act in addition to platelet pooling in the spleen on thrombocytopenia. PA-IgG may also have an important role in thrombocytopenia associated with chronic hepatitis, in which splenic platelet pooling is less marked.

Adult↗
PubMed1993

[An autopsy case of severe portal hypertensive gastropathy associated with a large shunt from superior mesenteric to left renal vein in a patient with alcoholic liver cirrhosis].

We report an autopsy case of severe portal hypertensive gastropathy with a large shunt from the superior mesenteric to left renal vein in a patient with alcoholic liver cirrhosis. A 60-year-old man with alcoholic cirrhosis was admitted for tarry stool and ascites. Endoscopic finding revealed multiple red spots and hemorrhagic gastritis at prepylorus of the stomach. Angiography showed a large shunt vessel originating from the superior mesenteric to left renal vein. He died of hepatic failure and DIC following frequent gastrointestinal bleeding. At autopsy, the stomach showed marked congestion of the capillary vessels in the tunica propria mucosa. This finding showed that the gastropathy resulted in the congestion of the gastric veins connecting with the large shunt vessel.

Disseminated Intravascular Coagulation↗
PubMed1992

Exposure to hepatitis B virus in the general population of Hisayama, Japan: significance of isolated antibody to hepatitis B surface antigen in general population.

Cross-sectional survey on the prevalence of hepatitis B serological markers was performed in 2,411 residents who accounted for 74.4% of the population aged 40 and over and living in Hisayama Town, Japan, in 1983. Overall prevalences were 40.7% for both anti-HBs and anti-HBc, 6.1% for isolated anti-HBs and 5.4% for isolated anti-HBc. The condition with isolated anti-HBs was different from those with isolated anti-HBc and both anti-HBc and anti-HBs as follows. The titer of anti-HBs in isolated anti-HBs positive samples was significantly lower than that in both anti-HBs and anti-HBc positive ones (46.2 +/- 5.4 vs. 83.2 +/- 2.8, mean +/- SE, p less than 0.001). The presence of isolated anti-HBs was neither significantly more frequent in males nor related to the risk of liver damages in contrast with that of anti-HBc with or without anti-HBs. These findings suggest that isolated anti-HBs pattern with the absence of anti-HBc in general population was not due to prior HBV infection, but due to natural immunization with HBsAg.

Adult↗
PubMed1992

Prevalences of hepatitis B surface antigen carriers and liver damages in the general population of Hisayama, Japan.

The prevalences of hepatitis B surface antigen (HBsAg) carriers and liver damages were studied in 2,411 residents aged 40 and over and living in Hisayama, Japan in 1983. Hepatitis B virus (HBV) associated markers were all measured by radioimmunoassay. HBsAg carriers were found in 2.3 per cent of the residents. Hepatitis B e antigen and antibody to hepatitis B e antigen were positive in 8.9 per cent and 80.4 per cent, respectively, of HBsAg carriers. The prevalences of liver damages in HBsAg carriers were compared with 1095 who had none of HBV markers (neither anti-HBc nor anti-HBs). The prevalences of abnormal aminotransferase level in sera were not different between HBsAg carriers and those who had none of HBV markers. A history of jaundice and/or hepatitis was evident in 32.3 per cent of male carriers and 24.0 per cent of female ones, being significantly more than those without HBV markers (13.1 per cent and 5.8 per cent, p less than 0.05 and p less than 0.005, respectively). These results indicate that, among HBsAg carriers aged 40 and over, few have active clinical signs of hepatitis, although about 20 per cent of them have histories of symptomatic hepatitis due to hepatitis B.

Adult↗
PubMed1991

Low activity of gamma-glutamyl transpeptidase in serum of acute intrahepatic cholestasis.

Low gamma-glutamyl transpeptidase (gamma-GTP) activity in serum was observed in 11 patients with acute intrahepatic cholestasis (cholestatic hepatitis and fulminant hepatitis), despite a marked increase in bilirubin levels. Inhibitors of gamma-GTP were not detected in sera of these patients. Their gamma-GTP levels in the liver were significantly higher than those in chronic liver diseases. An electrophoretic study of liver gamma-GTP in acute intrahepatic cholestasis showed the same mobility as in chronic liver diseases. These results suggest that the low serum gamma-GTP activity in acute intrahepatic cholestasis is due to factors inhibiting the release of the enzyme from the liver.

Alkaline Phosphatase↗
PubMed1991

[The effect of partial splenic embolization (PSE) on liver function test in patients with liver cirrhosis].

Five patients with hypersplenism associated with liver cirrhosis were treated by PSE and the changes of peripheral blood cells and liver function tests were observed. After PSE, all patients had a high fever and abdominal pain continued for a few weeks without severe complications. Peripheral blood cell counts improved soon after PSE and liver function tests (hepaplastin test and ICGR15) grew transiently worse, but they also improved within two months. During 4.5 to 10 months, the levels of albumin and total cholesterol of three patients increased, although the changes of bilirubin level and HPT were not shown. For other two patients, it was difficult to estimate the effect of PSE, because one patient was treated at the same time with lipiodol chemoembolization for HCC and another patient had a progress of nephrotic syndrome. On the other hand, ICG levels were stable after PSE but RI-uptake on liver scintigram increased in the liver. These results suggest that PSE may be able to improve not only hypersplenism but also liver function in the patients with compensated liver cirrhosis without severe complication.

Blood Cell Count↗
PubMed1989

Biochemical properties of media conditioned by simian virus 40-induced hamster tumor cells: correlation with distinct cell phenotypes but not with oncogenicity.

Hamster cells, transformed in vitro by SV40, have been reported to secrete an unidentified factor(s) that inhibits thymidine uptake (TU) by various normal cell types, including activated lymphocytes. It has been postulated that this apparent antiproliferative effect may play an in vivo role in the high tumorigenic capacity of SV40-transformed hamster cells. In keeping with this hypothesis, Adenovirus type 2-transformed hamster cells, which are only weakly tumorigenic, do not inhibit TU by indicator cells in vitro. To study the biological relevance of this phenomenon, we assayed 11 cell lines derived from different fibrosarcomas, induced in Syrian hamsters by SV40, for their ability to inhibit TU by normal rabbit kidney indicator cells. In contrast to cells transformed in vitro by SV40, media conditioned by 6 of 11 tumor-derived cell lines did not inhibit TU. Our results do not support the hypothesis that an antiproliferative factor secreted by SV40-transformed cells promotes the tumor-inducing capacity of these cells. Furthermore, inhibition of TU does not appear to be due to the production of a specific antimitotic peptide, but rather to other biochemical properties of the media conditioned by transformed cells. Finally, these biochemical properties do appear to correlate with specific morphological and growth characteristics of the tumor cells, but probably as an effect and not a cause.

Animals↗
PubMed1988

Prevalence and long-term prognosis of mild hypertensives and hypertensives in a Japanese community, Hisayama.

The prognosis and outcome for mild hypertensives (90 mmHg less than or equal to diastolic pressure less than or equal to 104 mmHg) and hypertensives (diastolic pressure greater than or equal to 105 mmHg) was prospectively studied in Hisayama, Japan, and compared between 1621 subjects aged 40 years or over, recruited in 1961, and 2053 subjects recruited in 1974. Each cohort was studied in a follow-up which lasted 10 years. The pharmacological treatment of hypertension proved effective among residents recruited in 1974: the survival rate had favorably improved, and the rates of mortality from cerebral stroke and morbidity from intracerebral stroke and morbidity from intracerebral hemorrhage declined significantly in mild hypertensives and hypertensives in the more recently recruited population. The management of mild hypertension was considered more likely to be effective in reducing stroke than in reducing coronary heart disease in the Japanese general population.

Adult↗
PubMed1987

Thyroid function in "yusho" patients exposed to polychlorinated biphenyls (PCB).

Thyroid function was investigated in 123 yusho patients who were exposed to toxic levels of polychlorinated biphenyls (PCBs) 16 years ago. In yusho patients, compared with the patients without evidence of yusho or normal controls, the serum triiodothyronine (T3) and thyroxine (T4) levels were significantly higher, while thyroid stimulating hormone (TSH) levels measured by sensitive assay were normal. There was no difference in serum levels of albumin, alkaline phosphatase, total cholesterol, and thyroxine binding globulin (TBG) between the two groups and the prevalence of positive antithyroid autoantibodies was almost the same, suggesting that hyperthyroxinemia in yusho patients was not due to increased TBG binding or abnormal autoimmune mechanism. Serum free T4 levels, however, were not elevated, although T4/TBG ratio was significantly higher. The thyroid hormone levels were higher than normal value in 4 of 123 yusho patients but only 1 case had clinical symptoms such as excessive perspiration. Despite higher serum PCBs in yusho patients, there was no correlation between PCB levels and levels of T3, T4, or TSH. The present results suggest hyperthyroxinemia without obvious clinical symptoms in yusho patients long after exposure to PCBs.

Adult↗