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Biomedical subjects

Y Sugai

Publications and source records attributed to Y Sugai.

At least 37 records · Page 2Linked to original sources
PubMed1999

[Evaluation of the liver uptake rate measured by 99mTc-GSA SPECT to assess liver function].

Whether the global liver uptake rate of 99mTc-GSA directly measured by SPECT is useful as a new index of liver function was evaluated in comparison with biochemical test results (PT%, ChE, Alb, ICG R15, KICG) and Child classification. 99mTc-GSA SPECT was performed in 157 patients with diffuse hepatic disease or hepatobiliary tumor, and two indices, namely the global liver uptake rate measured by SPECT 15 minutes after intravenous injection of 99mTc-GSA (LUS 15) and liver uptake per volume (liver uptake density) were examined. Both LUS 15 and liver uptake density were significantly correlated with biochemical test results and Child classification. In particular, close relationships between LUS 15 and ICGR15 (r = -0.720, p < 0.0001), LUS 15 and KICG (r = -0.750, p < 0.0001), and between LUS 15 and ChE (r = 0.720, p < 0.0001), indicate that LUS 15 is a useful index to evaluate liver function. Moreover, the local liver uptake rate measured by SPECT represented regional liver function and was considered a useful index to predict the function of the remnant liver after invasive treatment such as surgery.

Adult↗
PubMed1999

[The calculated reference value of the tubular extraction rate in infants and children: an attempt to use a new regression equation].

This study was designed to investigate the empirical tubular extraction rate (TER) of the normal renal function in childhood and then propose a new equation to obtain TER theoretically. The empirical TER was calculated using Russell's method for determination of single-sample plasma clearance and 99mTc-MAG3 in 40 patients with renal disease younger than 10 years of age who were classified as having normal renal function using diagnostic criteria defined by the Paediatric Task Group of EANM. First, we investigated the relationships of the empirical value of absolute TER to age, body weight, body surface area (BSA) and distribution volume. Next we investigated the relationships of the empirical value of BSA corrected TER to age, body weight, BSA and distribution volume. Linear relationship was indicated between the absolute TER and each body dimensional factors, especially regarding to BSA, its correlation coefficient was 0.90 (p value). The BSA-corrected TER showed a logarithmic relationship with BSA, but linear regression did not show any significant correlation. Therefore, it was thought that the normal value of TER could be calculated theoretically using the body surface area, and here we proposed the following linear regression equation: Theoretical TER (ml/min/1.73 m2) = (-39.8 + 257.2 x BSA)/BSA/1.73 The theoretical TER could be one of the reference values of the renal function in the period of the renal maturation.

Body Surface Area↗
PubMed1999

[The efficacy of SEMS for malignant upper gastrointestinal stenosis, evaluated by a "home index"].

We used a self expandable metalic stent (SEMS) on 24 patients (average age 68.6 years, 20 males, 4 females) with malignant upper gastrointestinal stenosis from August, 1997 to March, 1999. The primary diseases of the 24 patients were gastric cancer (13 cases: 54%), esophageal cancer (10 cases: 42%) and paraesophageal lymph node metastasis of breast cancer (one case: 4%). In this study, we present a "Home Index" as an indicator to evaluate a patient's quality of life, and investigated the efficacy and problem of SEMS.

Adult↗
PubMed1998

Familial spinocerebellar ataxia with cerebellar atrophy, peripheral neuropathy, and elevated level of serum creatine kinase, gamma-globulin, and alpha-fetoprotein.

Here, we report a familial spinocerebellar ataxia (FSCA), which has clinical features similar to Friedreich's ataxia, an ataxia with isolated vitamin E deficiency, and ataxia telangiectasia. However, the serum levels of creatine kinase, gamma-globulin, and alpha-fetoprotein were elevated, and biochemical and genetic analyses ruled out diagnosis of these three ataxias as well as other FSCAs. Thus, this family is thought to have a new type of FSCA.

Adult↗
PubMed1998

[Study of the validity of ADL assessment by Minsei-iin of bed ridden elderly cared for at home].

We studied the validity of assessment of activities of daily living (ADL) by minsei-iins of the bed ridden elderly cared for at home. The cases, 66 male and 128 female elderly in a county of Gunma Prefecture, had been registered by minsei-iins (non-professional district welfare commissioners) as bed ridden cared for at home. Minsei-iins interviewed the case and the caregiver at home, asking them about the term of care, the levels of independence in their daily living, and seven items of ADL. Out of the 194 cases registered, PTs or OTs interviewed 136 cases, 42 male and 94 female, and calculated the Barthel index score. The Quantification method of the first type was applied to the data to predict the Barthel index score. The independent variables were five items of ADL assessed by the minsei-iins. The relation was close between the assessment of all items of ADL by the minsei-iins and the Barthel index calculated by the PTs or OTs. The Quantification method of the first type revealed that bathing, excreting and walking contributed most to the measured Barthel index. The multiple correlation coefficient was 0.687. There were three cases who scored 100 in the Barthel index.

Activities of Daily Living↗
PubMed1998

[Discrepancy between 99mTc-HMPAO and 99mTc-ECD in Alzheimer's disease: does the retention mechanism depend on the disease?].

The discrepancy between 99mTc-hexamethyl-propyleneamine oxime (HMPAO) and 99mTc-ethyl cysteinate dimer (ECD) in Alzheimer's disease (AD) was investigated and compared with in cerebral ischemic disease (CID). The subjects were fourteen AD and thirty-one CID patients with clinically reasonable rCBF reduced lesion on 133Xe SPECT. The subjects did not include the cases of acute and subacute CID. These SPECT were performed within two weeks by ring-type dynamic SPECT (HEADTOME, Shimadzu, Japan). In the CID group, both of HMPAO and ECD SPECT could hardly detect the mildly reduced rCBF lesion on 133Xe SPECT but normal on X-CT. In the case of AD group, the rCBF-reduced lesion on 133Xe SPECT could be detected well by ECD SPECT, but the HMPAO hardly detected the reduced lesion. This discrepancy between HMPAO and ECD may be due to the difference of the retention mechanism. In the case of AD, the injury of esterase activity that participates with the ECD retention may be more notable than that of glutathione activity for the HMPAO retention. These results suggest suggest that the reduction of ECD or HMPAO density depends directly on the insufficiency of retention mechanism rather the than rCBF reduction. And the insufficiency of this retention mechanism depends on also type of the disease i.e. AD or CID.

Alzheimer Disease↗
PubMed1997

GB virus C and hepatitis C virus infections in hemodialysis patients in eight Japanese centers.

RNA of a putative non-A to E hepatitis virus, designated GB virus C (GBV-C), was detected in 40 (6.2%) of 645 hemodialysis patients, at a frequency significantly higher than in 3 (0.9%) of 336 blood donors in Japan (p < 0.001). A history of transfusion was more frequent (88 vs. 58%, p < 0.001), the duration of dialysis was longer (13.2 +/- 7.9 vs. 7.9 +/- 6.5 years, p < 0.001), and the detection of hepatitis C virus RNA was more often (38 vs. 18%, p < 0.01) in the 40 patients with GBV-C RNA than in the 605 patients without it. The prevalence of GBV-C RNA varied widely from 0 to 10% among the 8 dialysis centers. These results indicate that hemodialysis patients would be at increased risk of GBV-C transmitted by transfusions. The detection of GBV-C RNA in the 5 patients without a history of transfusion and a high prevalence restricted to certain dialysis centers would reflect nosocomial infection.

Alanine Transaminase↗
PubMed1997

[HGBV-C infection in patients with chronic liver disease].

Infection with HGBV-C was surveyed in 286 patients with chronic liver disease. HGBV-C RNA was detected in 19 patients (6.6%), by nested RT-PCR with 5'UTR-derived primers. There were no appreciable differences in clinical and virological features between patients with and without HGBV-C RNA in serum. HGBV-C RNA was detected in three of 83(4%) patients with HBV infection, 15(8%) of 188 patients with HCV infection, and one of 12(8%) patients without evidence of ongoing infection with HBV or HCV, suggesting that the contribution of HGBV-C to non-B non-C hepatitis would not be high. HGBV-C RNA was detected more frequently in the patients with liver cirrhosis or hepatocellular carcinoma than in those with chronic hepatitis. This could reflect a possible role of HGBV-C in aggravating liver disease in co-operation with the other hepatitis viruses.

Adult↗
PubMed1997

Infection with GB virus C in patients with chronic liver disease.

Infection with putative non-A to E hepatitis virus, designated GB virus C (GBV-C), was surveyed in 286 patients with chronic liver disease in Japan. RNA of GBV-C was detected, by reverse-transcription polymerase chain reaction with nested primers from the 5'-noncoding region, in 19 patients (6.6%) at a frequency higher (P < 0.001) than in three of 275 (1.1%) normal controls. It was detected in three of 83 (4%) patients with hepatitis B virus infection, 15 of 188 (8%) patients with hepatitis C virus infection, and one of 12 (8%) patients without evidence of ongoing infection with hepatitis B or C virus. GBV-C RNA was detected in nine of 186 (5%) patients with chronic hepatitis aged 51.2 +/- 13.3 years, six of 64 (9%) with liver cirrhosis aged 62.9 +/- 11.4 years, and four of 36 (11%) with hepatocellular carcinoma aged 62.0 +/- 11.1 years. Nucleotide sequences of 100 base pairs in the helicase region of GBV-C isolates from the 19 patients varied up to 21%, while sequences of 33 deduced amino acids were conserved and differed only by up to 6%. These results indicate that infection with GBV-C in patients with non-B, non-C chronic liver disease would not be frequent, although the sensitivity of the detection method could be improved. Coinfection of GBV-C with hepatitis B or C virus, as well as the duration of infection, might accelerate the progression of chronic liver disease.

Amino Acid Sequence↗
PubMed1996

[Glucose metabolism and Alzheimer's dementia].

Blood glucose levels are abnormally low in Alzheimer's dementia. We therefore examined glucose metabolism before death in relation to Alzheimer's dementia as determined at autopsy in 106 men and 161 women. The mean age was 81.8 +/- 8.6 years for men and 85.8 +/- 7.9 years for women (p < 0.001). The fasting plasma glucose level and hemoglobin Alc levels did not differ by sex. Alzheimer's dementia was detected in 88 patients (25.5%). More women than men had the disease, but the difference was not significant. Only 8.8% (3/34) of patients with diabetes mellitus had Alzheimer's dementia, as compared with 27.9% of patients without diabetes mellitus (65/233, p < 0.03). The fasting plasma glucose level was 89.9 +/- 13.4 mg/dl in patients with Alzheimer's dementia and 102.9 +/- 34.5 mg/dl in those without the disease. The hemoglobin Alc level was 5.7 +/- 0.8% in patients with Alzheimer's dementia and 6.4 +/- 1.5% in those without the disease. Both the fasting glucose level and hemoglobin Alc level were significantly lower in patients with Alzheimer's dementia than in those without the disease, p < 0.01. These data suggest that the development of Alzheimer's dementia is suppressed by the high plasma glucose levels in patients with diabetes mellitus.

Aged↗
PubMed1994

Hepatitis C virus infection in spouses of patients with type C chronic liver disease.

OBJECTIVE: Survey for markers of hepatitis C virus (HCV) infection in spouses of patients with HCV-related chronic liver disease. DESIGN: Cross-sectional clinical, serologic, and molecular biological study of spouses of patients with HCV viremia and chronic liver disease. SETTING: University and city hospitals. PARTICIPANTS: Spouses (52 men and 102 women; mean age, 56 +/- 11 years) of 154 patients with HCV viremia (102 men and 52 women; mean age, 58 +/- 10 years), of whom 66 had chronic hepatitis, 49 had liver cirrhosis, and 39 had primary hepatocellular carcinoma. METHODS: Tests for HCV-associated antibodies were done using a second-generation enzyme immunoassay and immunoassays with synthetic oligopeptides deduced from the HCV core gene. Hepatitis C virus RNA was detected by polymerase chain reaction with primers deduced from the 5'-noncoding region and HCV genotypes by reaction with type-specific primers deduced from the HCV core gene. RESULTS: Hepatitis C virus-associated antibodies were detected in 42 (27%) spouses, of whom 25 were also positive for HCV RNA. Of 112 (73%) spouses without detectable antibodies, 2 had chronic liver disease. The development of markers of HCV infection in spouses increased with the duration of marriage, ranging from 1 to 60 years (30 +/- 11 years). CONCLUSIONS: Spouses of patients with HCV viremia and chronic liver disease have an increased risk for acquiring HCV, which is proportional to the duration of marriage. They should be followed routinely for markers of HCV infection and liver disease.

Aged↗
PubMed1994

Hepatitis B virus with mutations in the core promoter for an e antigen-negative phenotype in carriers with antibody to e antigen.

Hepatitis B virus (HBV) DNA clones were propagated from 57 carriers with antibody to hepatitis B e antigen (HBeAg) and sequenced within nucleotides (nt) 1685 to 1926 including the core promoter (nt 1742 to 1849) and the pre-C region (nt 1814 to 1900). Mutations in the core promoter or those in the pre-C region, or both, were detected in 328 (97.9%) of 335 clones from them. Five carriers were infected with HBV mutants with mutations in the core promoter alone, while 20 carriers were infected only with those in the pre-C region to abort the translation of HBeAg precursor; the remaining 32 carriers were infected with HBV mutants with mutations in both the core promoter and pre-C region. Some carriers infected with HBV with mutations in the core promoter exclusively had high HBV DNA titers, comparable with those in carriers infected with wild-type HBV, thereby indicating that such mutations would not affect the transcription of the HBV pregenome extensively. Two point mutations in the core promoter, from A to T at nt 1762 and from G to A at nt 1764, were most prevalent. The other mutations included a point mutation at either of the two nucleotides and their deletion. All of these mutations involved the TTAAA sequence (nt 1758 to 1762) at 28 bp upstream of the initiation site for shorter pre-C mRNAs (nt 1790 +/- 1). The ATAAATT sequence (nt 1789 to 1795) at 23 bp upstream of the initiation site for the pregenome RNA (nt 1818), however, remained intact in all 335 HBV DNA clones. HBV mutants with mutations in the core promoter, unaccompanied by pre-C mutations, prevailed and replaced wild-type HBV in two carriers as they seroconverted from HBeAg to the corresponding antibody. These results indicate that HBV mutants with an HBeAg- phenotype would be generated by mutations in the core promoter which might abort the transcription of pre-C mRNA but do not seriously affect that of pregenome RNA.

Adult↗
PubMed1994

[Angiographical frequency of unruptured incidental intracranial aneurysms].

We reviewed cerebral angiograms studied between May 1985 and December 1992 focusing on unruptured incidental intracranial aneurysms. In a total of 605 cases of cerebral angiograms except for patients with SAH, 43 patients (7.1%) were found to have unruptured aneurysms. In the 72 patients with headache, 11 patients (15.3%) were found to have unruptured aneurysms. This high frequency of unruptured aneurysms in headache patients is significant as a factor showing that headache may be due to unruptured aneurysms. The result of this observation is that as a screening study for headache patients, cerebral angiography may be required in spite of the invasive and high-risk method. But we think that MR angiography is, at present, a useful screening study only for detecting cerebral aneurysms with a diameter of over 5mm, and which are considered to need an operation.

Age Factors↗