Biomedical subjects

H Ide

Publications and source records attributed to H Ide.

At least 37 records · Page 2Linked to original sources

PubMed1999

Analysis of postoperative complications after esophagectomy for esophageal cancer in patients receiving neoadjuvant therapy.

Postoperative complications were investigated in 72 patients who received neoadjuvant therapy with esophagectomy. Preoperative chemotherapy consisted of 5-fluorouracil (700 mg/m2/day, on days 1 to 5), cisplatinum (70 mg/m2/day, on day 1) and leucovorin (20 mg/m2/day, on days 1 to 5). Preoperative chemoradiotherapy consisted of cisplatinum combined chemotherapy and radiotherapy (total dosage of 30-70 Gy). The incidence of postoperative pneumonia (16%) and anastomotic leakage (24%) in the preoperative chemotherapy group was slightly higher than that in the control group (n = 506), and mortality (6.0%) after esophagectomy in the preoperative chemotherapy group was higher than that (2.4%) of the control group. Postoperative morbidity and mortality were observed more frequently in patients who received two cycles of the chemotherapy than those receiving only one cycle. Postoperative complications occurred more frequently in patients suffering high grade toxicities due to the preoperative chemotherapy. The highest preoperative serum creatinine value correlated to that of postoperative period (r = 0.6494). The use of the preoperative chemoradiotherapy with a total exposure dosage of 60 Gy or more significantly increased the postoperative pneumonia rate (67%; p < 0.05) compared to the group receiving 40 Gy or less. The mortality rate (33%) also increased. The second cycle of the preoperative chemotherapy should be cancelled if patients suffer high grade toxicities during or after the first cycle, and the total exposure dosage of the preoperative chemoradiotherapy should be limited to 40 Gy or less.

Antineoplastic Combined Chemotherapy Protocols↗

PubMed1999

Cloning of bovine LYST gene and identification of a missense mutation associated with Chediak-Higashi syndrome of cattle.

An inheritable bleeding disorder with light coat color caused by an autosomal recessive gene has been reported in a population of Japanese black cattle. The disease has been diagnosed as Chediak-Higashi Syndrome (CHS) of cattle which correspond to a human inheritable disorder caused by mutation in LYST gene. To characterize the molecular lesion causing CHS in cattle, cDNAs encoding bovine LYST were isolated from a bovine brain cDNA library. The nucleotide and deduced amino acid sequences of bovine LYST had 89.6 and 90.2% identity with those of the human LYST gene, respectively. In order to identify the mutation within the LYST gene causing CHS in cattle, cDNA fragments of the LYST gene were amplified from an affected animal by RT-PCR and their nucleotide sequences were completely determined. Notably, a nucleotide substitution of A to G transition, resulting in an amino acid substitution of histidine to arginine (H2015R) was identified in the affected animal. The presence of the substitution was completely corresponding with the occurrence of the CHS phenotype among 105 members of pedigrees of the Japanese black cattle and no cattle of other populations had this substitution. These findings strongly suggested that H2015R is the causative mutation in CHS of Japanese black cattle.

Amino Acid Sequence↗

PubMed1999

Immunohistochemical demonstration of inter-alpha-trypsin inhibitor light chain (bikunin) in human mast cells.

We recently reported that the rat mast cell proteinase inhibitor trypstatin is genetically identical with the second half of inter-alpha-trypsin inhibitor light chain (ITI-LC), also known as bikunin or urinary trypsin inhibitor (UTI). In this study, therefore, immunoreactivities of mast cells of various human tissues were examined with three antibodies, anti-human ITI-LC, anti-ITI, which recognizes mainly heavy chains or the sugar moiety of ITI, and anti-alpha 1-microglobulin (alpha1mG). ITI-LC immunoreactivity was strongly found in mast cells in the connective tissues of various organs except for those of the propria mucosae of small intestine. Neither anti-ITI antibody nor anti-alpha1mG antibody reacted with mast cells in various tissues. By reverse transcription-polymerase chain reaction (RT-PCR) analysis, alpha1mG/ITI-LC mRNA was not detected in the skin and tongue, and only weakly in small intestine, although ITI-LC immunoreactivity was strongly detected in these tissues. Furthermore, the mRNA was not expressed in cultured human mast cells. These results suggest that ITI-LC protein is stored in the granules of human connective tissue mast cells, though is not produced by them.

Alpha-Globulins↗

PubMed1999

Evaluation of the accuracy of preoperative staging in thoracic esophageal cancer.

BACKGROUND: Exact clinical staging before treatment of esophageal cancer has become increasingly important in the evaluation and comparison of the results of different treatment modalities, including surgery, chemotherapy, and radiotherapy. METHODS: The accuracy of preoperative tumor staging by using an esophagography, esophagoscopy, percutaneous and endoscopic ultrasonography, and computed tomography was assessed in 224 patients with resectable esophageal cancer. The results of tumor staging by these tests were compared prospectively with the pathologic stage of the esophagectomy specimens with respect to the T and N categories defined by the International Union Against Cancer TNM classification. RESULTS: For the T category, the overall accuracy was 80%. For the N category, overall accuracy was 72%, with a sensitivity of 78%, a specificity of 60%, and a positive predictive value of 78%. Overall, the accuracy of stage grouping was 56%. CONCLUSIONS: Either the T or N categories can be predicted reliably by clinical staging techniques. However, the preoperative stage grouping might not be valid in resectable, localized esophageal cancer.

Adult↗

PubMed1999

Retroperitoneal bronchogenic cyst: report of a case and literature review.

A large cystic mass was found in the subdiaphragmatic region of a 46-year-old woman who had complained of continuous pain in the left flank . The cyst was located in the retroperitoneum just below the diaphragm and was adhered to the diaphragmatic skeletal muscle and abdominal aorta, but was separate from the spleen, pancreas, left adrenal gland and left kidney. The surgically resected cyst measured 8 x 8 x 7 cm and was filled with protein-rich fluid, which contained amylase and embryonal proteins such as carcinoembryonic antigen, CA125 and CA19-9. Histologically, the cyst wall was composed of a fibrovascular connective tissue containing thin smooth muscle layers and mucus-secreting glands and was lined by a ciliated pseudostratified or tall columnar epithelium without dysplastic changes. Thus, a diagnosis of bronchogenic cyst, which is usually discovered in the posterior part of the mediastinum, was made. A rare case of bronchogenic cyst and a literature review is presented.

Biomarkers↗

PubMed1999

Cellular repair mechanism of 5-formyluracil.

5-Formyluracil (fU) is an oxidative DNA base damage. This damage has been suggested to be mutagenic and but enzymatic repair of the damage is little known. In this study, repair enzymes that recognize fU have been studied. Kinetic analysis of the repair activity of E. coli 3-methyladenine DNA glycosylase II (AlkA) showed that fU was removed by AlkA with the efficiency comparable to 7-methylguanine. We also examined the participation of the methyl-directed mismatch repair system. The affinity of MutS to the fU:G mispair was essentially similar to that of the T:G mispair that was most efficiently recognized by the MutSLH system. These results suggest two distinct repair pathways of fU in E. coli.

Base Pair Mismatch↗

PubMed1999

Preparation of DNA containing 7-methylguanine as unique lesions.

The predominant adduct produced by both endogenous and exogenous methylating agents is 7-methylguanine(m7G). Most studies on the repair of m7G reported so far used methylated DNA as substrates which contained other unintended lesions. In the presented study, DNA substrates containing m7G as unique lesions were prepared by DNA polymerase reactions. Using these substrates, damage recognition of E. coli 3-methyladenine DNA glycosylase II (AlkA) was analyzed. The obtained results suggested that the repair rate of m7G by AlkA was affected by the flanking sequence context of the lesion.

Cloning, Molecular↗

PubMed1999

Binding analysis of Xenopus laevis translation initiation factor 4E (eIF4E) in initiation complex formation.

A translation initiation factor, eIF4E, of Xenopus laevis was purified by affinity column chromatography after the gene expression as a full-length protein in a baculovirus-insect cell system. Interaction between X. laevis eIF4E and 4E-BP2 was analyzed by affinity column chromatography, gel permeation chromatography (GPC), and surface plasmon resonance (SPR). It was found that the interaction of eIF4E with an mRNA cap-analogue enhanced the binding activity of eIF4E with 4E-BP2. Furthermore, the SPR analysis showed that the eIF4E-cap-analogue interaction was very weak regardless of complex formation of 4E-BP2 with eIF4E; the dissociation constant of eIF4E for the cap-analogue was estimated to be 10(-2)-10(-4) M. These results suggest that the participation of another initiation factor is required for eIF4E to recognize the cap structure in vivo. The results reported in this paper support "the performed complex model" of Lee et al., in which eIF4E binds to the mRNA cap structure after the initiation factors have formed the initiation complex eIF4F.

Amino Acid Sequence↗

PubMed1999

Macrophage inflammatory protein 1 alpha expression by synovial fluid neutrophils in rheumatoid arthritis.

OBJECTIVE: To determine the contribution made by synovial fluid (SF) neutrophils to the augmented expression of macrophage inflammatory protein 1 alpha (MIP-1alpha) in rheumatoid arthritis (RA). METHODS: Neutrophils were isolated from samples of SF from RA patients and peripheral blood (PB) samples from RA patients and healthy controls. Cell associated MIP-1alpha was visualised immunohistochemically, and cell associated MIP-1alpha as well as MIP-1alpha secreted into the SF was assayed by ELISA. Steady state expression of MIP-1alpha mRNA was assessed by reverse transcription polymerase chain reaction (RT-PCR). RESULTS: Freshly isolated SF neutrophils contained significantly higher concentrations of both MIP-1alpha protein and its transcript than PB neutrophils from either RA patients or healthy controls; incubation in the absence or presence of tumour necrosis factor alpha for 24 hours resulted in a significant increase in MIP-1alpha secretion by RA SF neutrophils compared with neutrophils obtained from either normal PB or RA PB; and expression of MIP-1alpha by SF neutrophils was well correlated with both RA disease activity and SF mononuclear cell (MNC) counts. CONCLUSION: Expression and secretion of MIP-1alpha by SF neutrophils may be indicative of local and systemic inflammation in RA. Moreover, this C-C chemokine may contribute to the recruitment of MNCs from the bloodstream into synovial joints and tissues.

Adult↗

PubMed1999

Regulation of pulmonary circulation by alveolar oxygen tension via airway nitric oxide.

The effects of airway (AH) and vascular hypoxia (VH) on the production of nitric oxide (NO; VNO) were tested in isolated buffer-perfused (BFL) and blood-perfused rabbit lungs (BLL). To produce AH and/or VH, the lung was ventilated with 1% O(2) gas, and/or the perfusate was deoxygenated by a membrane oxygenator located on the inlet limb to the pulmonary artery. We measured exhaled NO (VNO), accumulation of perfusate NOx, and pulmonary arterial pressure (Ppa) during AH (inspired O(2) fraction = 0.01) and/or VH (venous PO(2) = 26 Torr). In BFL, a pure AH without VH caused decreases in VNO and NOx accumulation with a rise in Ppa. However, neither VNO, NOx accumulation, nor Ppa changed during VH. Similarly, in BLL, only AH reduced VNO, although NOx accumulation was not measurable because of Hb. When alveolar PO(2) was gradually reduced from 152 to 0 Torr for 20 min, AH reduced VNO curvilinearly from 73.9 +/- 8 to 25.6 +/- 8 nl/min in BFL and from 26.0 +/- 2 to 5. 2 +/- 1 nl/min in BLL. This plot was analogous to that of a substrate-velocity curve for an enzyme obeying Michaelis-Menten kinetics. The apparent Michaelis-Menten constant for O(2) was calculated to be 23.2 microM for BLL and 24.1 microM for BFL. These results indicate that the VNO in the airway epithelia is dependent on the level of inspired O(2) fraction, leading to the tentative conclusion that epithelial NO synthase is O(2) sensitive over the physiological range of alveolar PO(2) and controls pulmonary circulation.

Animals↗

PubMed1999

Carcinoembryonic antigen and carbohydrate antigen 19-9-producing adenocarcinoma of the prostate: report of an autopsy case.

Prostate-specific antigen (PSA) and prostatic acid phosphatase (PAP) are well known as specific tumor markers of prostate cancer, but carcinoembryonic antigen (CEA)- and carbohydrate antigen 19-9 (CA19-9)-producing adenocarcinoma originating in the prostate is rare. We report here a case of prostatic adenocarcinoma positive for these 4 tumor markers in a 50-year-old man who had initially complained about chest pain due to metastatic bone tumor. In spite of the extensive treatment involving hormone and radiation therapy, the patient died of rapid tumor extension only 4 months after initial diagnosis. Autopsy revealed multiple metastases to the bone, liver, lungs and lymph nodes. Histologically, two types of adenocarcinoma were involved in both primary prostate and metastatic sites: one was a poorly differentiated adenocarcinoma positive for PSA and PAP but not CEA or CA19-9, and the other one was a less differentiated adenocarcinoma partially positive for CEA and CA19-9 but not for PSA or PAP. Based on this case and previous cases by review of the literature, CEA- and CA19-9-producing adenocarcinoma of the prostate was suggested to rapidly progress with multiple metastases and to show poor prognosis with strong resistance to any treatment.

Acid Phosphatase↗

PubMed1999

[Effects of isatin, an endogenous MAO inhibitor, on dopamine (DA) and acetylcholine (ACh) concentrations in rats].

Isatin (indole-2,3-dione), an endogenous inhibitor of monoamine oxidase (MAO), has several physiological properties for stress and anxiety. We previously identified isatin in the brain of stroke-prone spontaneously hypertensive rats (SHRSP) using gas-chromatography mass spectrometry. This study elucidated the effects of isatin on the ACh and DA levels of brain tissues in rats. Furthermore, we evaluated the effect of isatin on DA levels in a rat model of Parkinson's disease induced by Japanese encephalitis virus. Striatal ACh and DA levels significantly increased at 2 hours after isatin (50-200 mg/kg, i.p.) administration. Perfused through a microdialysis probe, isatin (10(-6)-10(-4) M) also produced a significant and concentration-dependent increase in the ACh and DA concentrations in the perfusate from the rat striatum. Furthermore, urinary isatin concentrations in patients with Parkinson's disease tend to increase according to the severity of disease. Isatin (100 mg/kg, i.p.) significantly increased striatal DA levels in a rat model of Parkinson's disease. These results suggest that urinary isatin may become a diagnostic marker for the clinical severity of Parkinson's disease and that endogenous isatin, a new biological modulator, may play a role in the regulation of the brain levels of ACh by increasing the level of DA under stress.

Acetylcholine↗

PubMed1999

Downregulation of intercellular adhesion molecule-1 expression on human synovial fibroblasts by endothelin-1.

OBJECTIVE: To study the effect of endothelin-1 (ET-1) on the expression of intercellular adhesion molecule-1 (ICAM-1) by synovial fibroblasts derived from individuals with rheumatoid arthritis (RA) or osteoarthritis (OA). METHODS: The expression of ICAM-1 protein and the abundance of ICAM-1 mRNA in synovial fibroblasts derived from individuals with RA or OA, or healthy controls, was assessed by flow cytometry and Northern blot analysis, respectively. mRNA expression of ET type A (ETA) and ET type B (ETB) receptors was assessed by reverse transcription polymerase chain reaction. RESULTS: Tumor necrosis factor-alpha (TNF-alpha) increased the expression of ICAM-1 by RA and OA fibroblasts. While ET-1 alone had no significant effect on ICAM-1 expression by either cell type, it inhibited the TNF-alpha induced increase in ICAM-1 expression, and this effect was more marked in RA fibroblasts. TNF-alpha also increased the amount of ICAM-1 mRNA in both cell types, and ET-1 inhibited this increase to a greater extent in RA fibroblasts than in OA fibroblasts. This inhibitory effect of ET-1 was reversed by addition of specific antagonist of ETA receptor. mRNA expression of ETA and ETB receptors was significantly greater in RA fibroblasts stimulated with TNF-alpha or even medium alone than in OA fibroblasts. CONCLUSION: These results suggest that ICAM-1 expression by fibroblasts is regulated not only by proinflammatory cytokines such as TNF-alpha and interleukin-1beta, but also by the vasoactive peptide ET-1, and that ET-1 may play an important role in inflammatory responses, especially in rheumatoid synovitis.

Aged↗

PubMed1999

[Imipenem/cilastatin sodium and other beta-lactams for respiratory tract infections: clinical benefit and treatment days for cure].

Therapeutic efficacy and the treatment days for cure of imipenem/cilastatin sodium (IPM/CS) in treatment of pulmonary infections were prospectively determined in comparison with those of beta-lactams other than carbapenems mainly ceftazidime (CAZ) or sulbactam/cefoperazone (SBT/CPZ). The overall response rate was 84.9% (62/73) in the IPM/CS group and 74.7% (56/75) in the beta-lactam group, the difference not being significant. In the subjects having underlying respiratory diseases, the response rate was 91.1% (41/45) and 73.9% (34/46) in the IPM/CS and beta-lactam groups, respectively. In patients with infections secondary to chronic respiratory disease, the rate was 91.2% (31/34) in the former group and 66.7% (24/36) in the latter group, respectively. The differences were significant for both stratified analyses. The treatment days for cure judged by the attending physician were 12.9 +/- 0.6 days in the IPM/CS group, and 14.5 +/- 0.7 days in the beta-lactam group. The difference was not, however, significant. In patients with mild to moderate infections, the treatment days for cure was 12.0 +/- 0.6 days (n = 64) in the IPM/CS group and 14.3 +/- 0.7 days (n = 70) in the beta-lactam group. In patients with underlying respiratory disease, the treatment days for cure were 11.8 +/- 0.7 days (n = 45) and 14.7 +/- 0.9 days (n = 46) in the IPM/CS and beta-lactam groups, respectively. In patients with infections secondary to chronic respiratory disease, the days were 11.1 +/- 0.7 days (n = 34) and 14.7 +/- 1.1 days (n = 36), respectively. Thus, IPM/CS therapy significantly reduced the number of treatment days until cure. There was, however, no significant difference between the two therapy groups in treatment of the patients with severe infections, those without underlying respiratory disease, or those with pneumonia and/or lung abscess. The treatment days for cure were also assessed by the members of review committee taking into consideration of body temperature, leukocyte count, and C-reactive protein. As the result, it was 6.9 +/- 0.5 days in the IPM/ CS and 10.3 +/- 0.7 days in the beta-lactam groups; respectively, and the difference was significant. Time (days) until cure was also compared between the two groups using survival time analysis, confirming a more rapid response in the IPM/CS group. Although IPM/CS therapy was associated with a shorter response time as assessed by both the attending physicians and the review committee, there were considerable differences between the results of these judgements. Thus, the duration of treatment with injectable antibiotics requires reevaluation in the future. No significant differences were observed between the groups with respect to parameters indicating side effects and laboratory abnormalities. There were no severe symptoms or laboratory findings, and symptoms and changes in laboratory values, if any resolved during the course of therapy or after the withdrawal of treatment. In conclusion, IPM/CS seems to be very useful as first-line therapy for respiratory tract infections and for shortening the duration of treatment.

Adult↗

PubMed1999

Pulmonary embolectomy for acute massive pulmonary embolism under percutaneous cardiopulmonary support.

Portable percutaneous cardiopulmonary support (PCPS) with heparin-coated circuits and a biopump was employed in a patient who had a massive pulmonary embolism with circulatory collapse after stripping of varicosities of the leg. Emergency pulmonary embolectomy was successfully performed. The main pulmonary incision was facilitated by cross-clamping of the main pulmonary arterial root. The bypass circuit was kept closed, and used with the normothermic beating heart without converting to conventional total cardiopulmonary bypass. Blood flow from the lung was removed by pump suction, stored in the reservoir, and intermittently returned to the venous circulation. Heparin was added to the circuits to keep the activated clotting time greater than 300 sec. In massive pulmonary embolism, PCPS is useful for preoperative, intraoperative, and postoperative support.

Acute Disease↗

PubMed1999

[A case report of diabetic scleredema in a patient with non-insulin-dependent diabetes mellitus].

A 70-year-old Japanese man with non-insulin-dependent diabetes mellitus showed scleredema diabeticorum. The patient complained of edematous feelings on his hands, both arms and face. The time of onset of these symptoms was not known. He had typical clinical and histopathological findings of diabetic scleredema. His diabetic control was poor and HbA1c level was 8.2% under insulin treatment. The patient had many complications such as diabetic retinopathy, diabetic nephropathy with benign nephrosclerosis, hyperlipidemia accompanied with a low level of high density lipoprotein cholesterol, hypertension and coronary heart disease. There were no abnormal laboratory findings except the diabetic controls and mild abnormal renal functions; however erythrocyte sedimentation rate was high.

Aged↗

PubMed1999

Expression of cholesterol 7alpha-hydroxylase and delta(4)-3-ketosteroid 5beta-reductase genes in rat pancreatic hepatocyte-like cells.

Hepatocyte-like cells have been observed in the pancreas of the rat. We examined the bile acid biosynthetic function of these cells to determine whether they were real hepatocytes. This study investigated the existence of two liver-specific enzymes involved in bile acid biosynthesis (cholesterol 7alpha-hydroxylase and delta(4)-3-ketosteroid 5beta-reductase) in the hepatocyte-like cells. We could demonstrate cholesterol 7alpha-hydroxylase activity and its circadian rhythm in the hepatocyte-like cells. Northern blot analysis demonstrated the expression of messenger RNA for the 7alpha-hydroxylase and delta(4)-3-ketosteroid 5beta-reductase in the pancreatic hepatocyte-like cells. To measure the amount of the messenger RNA, we used the competitive polymerase chain reaction method for the 7alpha-hydroxylase. This quantitation revealed the existence of a circadian rhythm of cholesterol 7alpha-hydroxylase messenger RNA in the hepatocyte-like cells. These results indicated that bile acid biosynthesis was performed in the pancreatic hepatocyte-like cells as noted as in the liver parenchymal cells.

Animals↗

PubMed1999

[Implication of health checkups of students from developing countries in Japan].

We investigated the prevalence of peripheral blood abnormalities, parasitic infestation, and hepatitis virus infection, by using the results of the primary screening health checkups for 423 students (male: 317, female: 106, average age +/- SD: 34.2 +/- 5.5 year-old) from abroad. Most of them were from Southeast Asia, Africa, Central and South America, and other developing countries in tropical or subtropical areas. Thalassemia-like hematological disorders, showing microcytic peripheral red blood cells without any anemia, were seen in 7.6 percent of the students, and intestinal parasites were revealed in 12.7 percent of them. The positive rate for anti-hepatitis A virus antibodies (84.3%) and the exposure rate of hepatitis B viruses (35.3%) were similar to previous reports. Compared with the positive rate for anti-hepatitis C virus antibodies (anti-HCVAb) of students from other regions (1.5%), a significantly high seropositivity for anti-HCVAb was encountered in Egyptian participants (21.1%). In recent years, population shifts and rapid transportation have facilitated the spread of certain infectious diseases from endemic to non-endemic areas. International preventive strategies, education of people regarding infectious diseases, and sufficient medical staffs for this purpose are urgently recommended.

Adult↗