[Epidemiologic study on physical activity and type 2 diabetes].
Explore the source record for details and available documents.
Aerobiosis↗
Biomedical subjects
T Muto
Publications and source records attributed to T Muto.
[Physical activity and health promotion].
Explore the source record for details and available documents.
Exercise↗
[Historical review of colorectal cancer surgery].
The classical standard surgical technique for rectal carcinoma, abdominoperineal excision (Miles operation), has been gradually replaced by sphincter-saving surgery and more than 70% of rectal carcinomas are treated by anterior resection in which autosuture machines have played a major role in recent years. Wide lateral lymphadenectomy has been replaced by autonomic nerve preservation because of the high frequency of sexual and urinary dysfunction. Total mesorectal excision (TME) proposed by Heald et al which ignores the lateral nodes of the pelvic wall is the most popular technique in Western countries. The concept of TME is contradictory to that of wide lateral lymphadenectomy and the true merits of the latter should be examined in the near future. Minimally invasive surgery, including various procedures of local excision of low rectal tumors and colonoscopic polypectomy, has given great benefits to many patients. In Japan there seems to have been a lack of interest in adjuvant radiotherapy and chemoradiotherapy in the past, but they should be more seriously considered for the adjuvant treatment of advanced rectal carcinoma in the future.
Colonoscopy↗
Antigraviceptive neck muscle responses to "moving up and moving down" in human.
The responses of neck muscle to sudden transit from one 'g' to hyper 'g', work to support the head and remain the relative position of head on trunk as common observed: i.e. in sudden acceleration or deceleration by car or ejection of pilot from aircraft. Accordingly it is highly possible that the neck muscle responses to moving up may be important to prevent the neck injury due to sudden linear acceleration such as moving up against gravity. However little is known about the evaluation of mechanism of this reflex. Therefore the present study was conducted with two aims. The first aim was to investigate the neck muscle responses to vertical linear acceleration bv 0.4 g produced with an electro-hydraulic servo-system. We chose the vertical linear acceleration because it activates mainly sacculus, from which afferents have been demonstrated to be connected directly to sternocleidomastoid muscle in animals and human. The second aim was to determine whether there is a difference of neck muscle response to moving down and moving up.
Acceleration↗
Cell-mediated graft rejection observed in two lines of human histocompatibility leukocyte antigen class I transgenic mice.
BACKGROUND: Human histocompatibility leukocyte antigen (HLA) class I molecules are essential for graft rejection. However, to determine the specific role of these molecules in clinical situations is difficult. We investigated the applicability of HLA class I transgenic mice (C3H.B35 and C3H.B51) for elucidation of the role of HLA class I molecules. METHODS: Skin or heart grafts were transplanted. Cytotoxic T cells (CTL) of C3H.B51 against C3H.B35 were generated and their cytotoxicity against various transfectant cell lines was determined. RESULTS: C3H.B35 skin and heart grafted to C3H.B51 were rejected within 17 and 28 days, respectively. Cytotoxic T cells generated from C3H.B51 showed cytotoxicity against a HLA-B*3501-transfectant cell line that did not express H-2 molecule, which indicates that these cytotoxic T cells recognize HLA-B35 molecules directly without H-2 restriction. CONCLUSION: Our results suggest that C3H.B51 recognize C3H.B35 grafts as allo-MHC class I-incompatible grafts, and these mice are valuable to elucidate the role of HLA class I molecules in transplantation.
Animals↗
Effects of exposure to repetitive pulsed magnetic stimulation on cell proliferation and expression of heat shock protein 70 in normal and malignant cells.
This study focused on the effects of repetitive pulsed magnetic stimulation (RPMS) on normal and malignant cells of humans. We used three human cell lines, HBL-100 (human normal breast epithelium), MCF-7 (human breast cancer), and HeLa (human cervical cancer). Cell proliferation at 37 degrees C and 40 degrees C and the expression of heat shock protein (HSP) 70 at 37 degrees C, 40 degrees C, and 42 degrees C, before and after the exposure to RPMS, was investigated. Cell proliferation showed no effects of exposure to RPMS in both normal and malignant cells; however, HSP70 expression was increased by RPMS exposure under thermal stress at 40 degrees C and 42 degrees C in HBL-100 and HeLa. We concluded that RPMS exposure potentiates the effect of thermal stress on both normal and malignant cells, and malignant cells derived from different organs respond differently to RPMS exposure.
Breast↗
Loss of transcription factor IRF-1 affects tumor susceptibility in mice carrying the Ha-ras transgene or nullizygosity for p53.
The transcription factor IRF-1 has been implicated in tumor suppression: IRF-1 suppresses cell transformation and mediates apoptosis in vitro. Here we show that the loss of IRF-1 alleles per se has no effect on spontaneous tumor development in the mouse but dramatically exacerbates previous tumor predispositions caused by the c-Ha-ras transgene or by nullizygosity for p53. Grossly altered tumor spectrum, as compared to p53-null mice, was also observed in mice lacking both IRF-1 and p53, and cells from these mice show significantly higher mutation rate. Our results suggest that IRF-1 is a new member of the tumor susceptibility genes.
Animals↗
Acquisition of glutamine synthetase expression in human hepatocarcinogenesis: relation to disease recurrence and possible regulation by ubiquitin-dependent proteolysis.
BACKGROUND: The authors previously reported increased ubiquitin (Ub) immunoreactivity in hepatocellular carcinomas (HCCs) and suggested a possible correlation between changes in ubiquitinated protein levels and multistep hepatocarcinogenesis. The current study was performed to identify one of these ubiquitinated proteins (42 kDa) and to analyze the clinical significance of its accumulation. METHODS: The protein was purified using two-dimensional gel electrophoresis and identified by amino acid sequence analysis. The authors studied the expression of this protein in 101 HCCs and 23 precancerous lesions by immunohistochemical methods and in 26 HCCs by immunoblot analysis. A survival analysis was performed on patients with advanced HCC using the Kaplan-Meier method with approximate chi-square statistics for the log rank test. RESULTS: The target protein for ubiquitination was identified as glutamine synthetase (GS). Accumulation of GS was found in 19 of 49 advanced HCCs (38.8%) by immunohistochemical methods and in 9 of 16 (56.3%) by immunoblot analysis, whereas the frequency was much lower in early HCCs (12.9% and 33.3%, respectively) and precancerous lesions (4.3% by immunostaining). In the Ub immunoblot analysis of strongly GS positive specimens, an intense 42-kDa ubiquitinated band was observed. Nine of 21 (42.9%) nodule-in-nodule type HCCs showed a GS positive, high-grade component within a GS negative, low-grade component, indicating the acquisition of GS expression during progression. Among 23 patients with a single advanced HCC nodule, the relapse free survival time was significantly shorter in the GS positive group than in the GS negative group. CONCLUSIONS: The results of this study demonstrate the acquisition of GS expression during hepatocarcinogenesis and the possible regulation of GS enzyme activity by a Ub-dependent proteolytic system. Moreover, GS might play a significant role in promoting the metastatic potential of HCC.
Amino Acid Sequence↗
Association between duration of obesity and risk of non-insulin-dependent diabetes mellitus. The Sotetsu Study.
The authors investigated the association between duration of obesity (ordinary obesity as body mass index (BMI) (kg/m2) > or = 25.0 and extreme obesity as BMI > or = 27.8) and the risk of diabetes mellitus. Male employees of a railway company, aged 30 years or older, observed for 10 years or more, free from serious disease conditions, with initial BMI <25.0, aged 30 years or more at the time diabetes was diagnosed, and with complete data, were examined by univariate and multivariate analyses (n = 1,598). Age-adjusted odds ratios for diabetes were significantly increased among males who were obese for 10-19.9 years and >20 years (odds ratios = 2.10 and 2.84 for ordinary obesity and 6.14 and 4.15 for extreme obesity, respectively). Additional adjustment for current obesity, physical activity, smoking, drinking, family history, and observation period did not change the findings remarkably. In conclusion, > or = 10 years duration of ordinary obesity or > or = 1 year of extreme obesity was an important predictor for diabetes independent of age, current obesity, physical activity, smoking, drinking, family history, and observation period.
Adult↗
CD8(+)NKR-P1A (+)T cells preferentially accumulate in human liver.
A unique subset of T cells that co-express NKR-P1, which is a lectin type of NK receptor and is thought to have a major role in triggering NK activity, has been identified. In mice, NK1.1 (mouse NKR-P1C)(+) T cells, called NKT cells, preferentially accumulate in the liver and bone marrow. They predominantly use invariant Valpha14 chain TCR and phenotypically are CD4(+)CD8(-) or CD4(-)CD8(-) T cells. In this study, we analyzed, phenotypically and functionally, the NKR-P1A (analogue of murine NKR-P1C)(+) T cells resident in the human liver. Here, we show that in complete contrast to the NKT cells in the mouse liver, the majority of NKR-P1A(+) T cells in the human liver are CD8(+) and their TCR repertoire is not skewed to Valpha24 TCR, the homologue of murine Valpha14 TCR. Almost all of the NKR-P1A(+) T cells in the human liver expressed CD69, suggesting that they were activated. Furthermore, the NKR-P1A(+) T cells in the human liver exhibited strong cytotoxicity against a variety of tumor cell lines including K562, Molt4 and some colonic adenocarcinoma cell lines.
Adenocarcinoma↗
Concomitant increase in neutrophil adhesion to inflammatory peritoneum and remote organs during peritonitis.
BACKGROUND: Neutrophils contribute to the host defense mechanism, but they can cause remote organ injury in peritonitis. The purpose of this study was to examine neutrophil adhesion to the peritoneum and remote organs simultaneously in peritonitis using a fluorescence microscopic method. STUDY DESIGN: Experiment 1: Sprague-Dawley rats (n = 16) were injected intraperitoneally (ip) with saline solution or 10(5), 10(7), or 10(9) Escherichia coli. Five hours after challenge, 1 x 10(6) fluorescein-labeled neutrophils were infused. Two minutes after neutrophil injection, five peritoneal samples (the greater omentum, mesentery, parietal peritoneum, colon, and ileum), both lungs, the liver, and the right kidney were harvested for counting of labeled neutrophils under epifluorescent microscopy. Lung myeloperoxidase (MPO) activity was also determined. Experiment 2: Rats (n = 23) were given 10(9) E. coli ip. Before challenge (0 h) or at 1, 5, or 10 h after challenge, labeled neutrophils were infused. Then, the labeled neutrophil numbers in organs and lung MPO activities were assessed as described for Experiment 1. Hemodynamic and arterial blood gas data were also obtained in another set of rats before and at 1, 5, 8 and 10 h after 10(9) E. coli ip challenge. RESULTS: Experiment 1: The labeled neutrophil numbers in the peritoneum, lungs, and kidney showed significant positive correlations with the injected bacterial numbers. Lung MPO also positively correlated with E. coli number and labeled neutrophil number in the lungs. Experiment 2: Labeled neutrophil numbers in the peritoneum and kidney peaked at 5 h. The pulmonary labeled neutrophil number rose, reaching a plateau at 5 h. No remarkable change was observed in the hepatic labeled neutrophil number. There was a positive correlation between lung MPO activity and pulmonary labeled neutrophil number. Hemodynamic and blood gas data reflected a hyperdynamic state. CONCLUSIONS: Concomitant dose-dependent increases in neutrophil adhesion in the peritoneum, lungs, and kidney were observed in this peritonitis model. Increased neutrophil adhesion was transient in the peritoneum and kidney but persistent in the lungs. Strategies modulating neutrophil adhesion in organs are anticipated to be useful for the treatment of peritonitis.
Animals↗
Giant solid cystic tumor of the pancreas with a fibrous septum caused by extracapsular growth in middle-aged woman: report of a case.
We report herein the case of a 57-year-old female who was admitted to our hospital for treatment of rectal carcinoma and incidentally found to have a giant cystic tumor, 20 cm in diameter, in the body and tail of the pancreas. Several imaging procedures, including ultrasonography, computed tomography, and magnetic resonance imaging, showed that this tumor was round and hypovascular, and had a septum with protuberant lesions. The capsule was 3-4 mm thick with partial calcification. A preoperative diagnosis of a solid cystic tumor (SCT) of the pancreas was made, even though these tumors are rarely found in females in their fifties. Moreover, few reports of SCT with a septum have been described. Distal pancreatectomy and splenectomy were performed, and the tumor was found to be filled with massive necrotic tissue. Microscopically, the tumor was confirmed to be a SCT with a fibrous septum. We present this case due to the atypical findings, including the age of the patient and the existence of a septum caused by extracapsular growth.
Biopsy, Needle↗
Exposure and dissection of the root of the right gastric artery during gastric surgery.
A technique, by which the root of the right gastric artery can be clearly exposed and the area of the right gastric artery can thus be completely dissected, is presented herein. In conventional procedures, the approach to the right gastric artery is performed from the lesser omentum, and a lymphadenectomy along the common hepatic artery is carried out after the division of the right gastric artery. Using the present technique, the common hepatic artery is exposed before the exposure of the right gastric artery and lymph node dissection is thus continued peripherally to the proper hepatic artery. During these procedures, the root of the right gastric artery arising from the hepatic artery can be easily identified. The lymphatic flow from the area of the right gastric artery to that of the common hepatic artery is transected using the conventional procedure, but not with the present technique. In addition, an en bloc dissection of the regional lymph nodes is also possible when using this procedure.
Arteries↗
Sigmoid colon cancer associated with primary hyperparathyroidism: report of a case.
We present herein a case of sigmoid colon cancer associated with primary hyperparathyroidism (PHP). PHP is known to be associated with malignancy, and decreased intracolonic calcium (Ca) resulting from increased vitamin D (VD) levels may play a role in colorectal carcinogenesis. PHP was diagnosed in this patient by preoperative screening blood chemistry examination. The blood level of intact parathyroid hormone (PTH) was elevated and a parathyroid gland scintigram demonstrated abnormal uptake near the right lower lobe of the thyroid. There was no evidence of bone metastasis, and a sigmoid colectomy was performed with curative intent. The patient had an uneventful postoperative course without a critical elevation of the serum Ca level. This case report suggests that a relationship exists between PHP and colon cancer, and the possible mechanisms of this association are presented in our discussion.
Adenocarcinoma↗
The occurrence of an abdominal wall abscess 11 years after appendectomy: report of a case.
Most complications after appendectomy occur within 10 days; however, we report herein the unusual case of a patient in whom a wound abscess was detected more than 10 years after an appendectomy. A 26-year-old woman presented to our hospital with nausea and vomiting, pain, and a mass in the right lower abdominal wall. She had undergone an appendectomy 11 years previously. Physical examination revealed a tender mass, 5 cm in diameter, under the appendectomy scar. An abdominal ultrasonography demonstrated a low-echoic mass lesion measuring 9.0 x 5.0 x 2.0 cm. Incision of the connective tissue revealed about 3 ml of cream-colored and odorless fluid in the abscess cavity. Fistulography revealed an abscess cavity not communicating with the bowel lumen. Floss was discovered in the connective tissue and removed. Debridement of the abscess wall was performed and a piece of the wall was sent for histologic examination. Pathological examination revealed panniculitis of the subcutaneous tissue, and panniculitis with granulation and granuloma of the abscess wall. This case report demonstrates that a preoperative diagnosis should be based not on one finding, but on all findings collected, inclusively.
Abdominal Abscess↗
Correlation of the therapeutic effect of activated tumor-draining lymph node cells with specific interferon-gamma production in vitro.
It has been established that lymphocytes obtained from tumor-draining lymph nodes (DLN) are sensitized to the tumor antigen in vivo. Moreover, after being activated in vitro, these cells can be utilized for adoptive immunotherapy. In the present study, DLN cells, obtained from C57BL/6 mice with fibrosarcoma (MC-1), were activated and expanded with anti-CD3 monoclonal antibody followed by culture with recombinant interleukin-2 (rIL-2). These CD4- CD8+ CD25+ CD44+ T-cells showed specific antitumor efficacy to the pulmonary micrometastases of an autologous tumor, against which lymphokine-activated killer cells were ineffective; however, they did not show cytolytic activity in vitro. The supernatant, obtained by coculturing the activated DLN cells with MC-1 cells, exhibited the specific production of interferon-gamma (IFN-gamma) which was enhanced by rIL-2. The therapeutic effect of the activated DLN cells correlated with the specific IFN-gamma production better than with the cytolytic activity.
Animals↗
Conservative management of a methicillin-resistant Staphylococcus aureus (MRSA)-infected aortobifemoral graft: report of a case.
A 63-year-old man was referred to our department for treatment of intermittent claudication in the right lower limb. The preoperative angiogram showed severe stenosis extending from the terminal aorta to the bilateral common femoral arteries, with occlusion of the right superficial femoral artery and the left popliteal artery. He underwent aortobifemoral bypass with thromboendarterectomy of the left common femoral artery, and right graft-popliteal artery bypass. The patient had an uneventful postoperative course; however, 14 days after the operation, a pulsatile mass suddenly appeared in the left groin. Emergency surgery revealed disruption of the left distal anastomosis of the aortobifemoral bypass and therefore, revision, in the form of graft-profunda femoris artery interposition with graft-superficial femoral artery bypass, was performed. Microscopic examination showed colonies of bacteria in the host artery adventitia adjacent to the anastomosis. Culture of the discharge from the right groin operative scar revealed methicillin-resistant Staphylococcus aureus (MRSA). The discharge resolved following the intravenous administration of vancomycin and the local application of vancomycin ointment. There were no operative complications other than the MRSA infection, and the patient was discharged 20 days after revision surgery. In the 14 months since the revision, all grafts have remained patent and there have been no further symptoms of graft infection.
Anti-Bacterial Agents↗
The development of a pancreatic abscess, suppurative pylethrombosis, and multiple hepatic abscesses after a pancreatojejunostomy for chronic pancreatitis: report of a case.
We present herein an autopsy case of 63-year-old Japanese man who died as a result of pancreatic abscess, suppurative pylethrombosis, and multiple liver abscesses that had developed 10 years after a pancreato- and cystojejunostomy with side-to-side anastomosis for chronic pancreatitis. Even after this operation, the patient had continued to consume excessive amounts of alcohol. He had first experienced back pain with leukocytosis 9 years after the operation, which relapsed the following year. Despite percutaneous transhepatic gallbladder drainage, his icterus had deteriorated into hepatic insufficiency. Computed tomographic scans of the abdomen had disclosed multiple liver abscesses. At autopsy, a pancreatic abscess and suppurative pylethrombosis as well as multiple liver abscesses were found. There have been few reported cases of such lethal complications developing after a pancreato- and cystojejunostomy for chronic pancreatitis. As the consumption of alcohol would have exacerbated the chronic pancreatitis, such patients should be strongly advised to abstain from drinking alcohol.
Alcohol Drinking↗