The Tohoku Journal of Experimental Medicine
Online ISSN : 1349-3329
Print ISSN : 0040-8727
ISSN-L : 0040-8727
180 巻, 2 号
October
選択された号の論文の9件中1~9を表示しています
Regular Contributions
  • Catherine Sauvaget, Ichiro Tsuji, Jing Hua Li, Toru Hosokawa, Akira Fu ...
    1996 年 180 巻 2 号 p. 87-98
    発行日: 1996年
    公開日: 2006/05/02
    ジャーナル フリー
    Despite the wish of the Japanese people to spend their final moments at home, the percentage of deaths at home among elderly is decreasing. Moreover, large variations in this rate were observed over the country. The present ecological study analyzed the relationship between the percentage of deaths at home for decedents aged 70 and over, and demographic, medical and socioeconomic characteristics. The data published in 1990 by the Japanese National Government were analyzed by correlation, principal-component, and multiple linear regression analyses. The results showed that the percentage of deaths at home for decedents aged 70 and over was positively associated with the number of persons per household, and the area of floor space per house. The divorce rate, the national tax per capita, and the mean length of hospitalization for stroke showed a negative association with the percentage of deaths at home. In the prefectures where the crude death rates of stroke and senility were high, elderly were more likely to die at home. These results suggested the importance of the number of family caregivers, and the housing conditions for terminal care at home. This research may lead to improve home medical assistance which is still underdeveloped in Japan.
  • Shinichiro Shimbo, Chan-Seok Moon, Zuo-Wen Zhang, Takao Watanabe, Noor ...
    1996 年 180 巻 2 号 p. 99-114
    発行日: 1996年
    公開日: 2006/05/02
    ジャーナル フリー
    Nutrient intake was surveyed by the total food duplicate method in 49 adult ethnically Malay women (at the ages of 18 to 47 years and mostly at 30-39 years) working in Kuala Lumpur, Malaysia. Simultaneously, hematological examinations, serum biochemistry, anthropometry and clinical examination were conducted. Nutrient intakes were estimated in reference to the weight of each food item and the standard food composition tables. Lunch was the most substantial meal of the day with rice as a staple food. Compared with the Recommended Dietary Allowance (RDA) values, daily intakes of energy (1,917 kcal as an arithmetic mean), protein (62.2 g), vitamin B1 (0.83 mg) and vitamin B2 (1.18 mg) were sufficient, but intakes of minerals [i.e., calcium (347.8 mg) and iron (12.5 mg)] and some vitamins [i.e., vitamin A (equivalent to 627 μg retinol) and niacin (7.84 mg)] were less than RDA. When evaluated on an individual basis, the prevalence of those who took less than 80% RDA was highest for iron (92%), followed by niacin (80%), calcium (57%) and vitamin A (57%). The presence of 7 hypohemoglobinemia cases may be related to the insufficient iron intake. Overweight cases (14 women) were also detected, the prevalence of which increased at advanced ages. Lipid intake was rather high (28% of total food on energy basis), for which the major source was plants with limited contribution from fish/shellfish.
  • Mika Watanabe, Takashi Sawai, Hiroshi Nagura, Kyozo Suyama
    1996 年 180 巻 2 号 p. 115-130
    発行日: 1996年
    公開日: 2006/05/02
    ジャーナル フリー
    It is well known that the elastic property of human aorta decreases gradually with age. Since the cross-linking structures are responsible for this elasticity, age-related changes of cross-linking amino acids in human aorta were studied using a high-performance liquid chromatography (HPLC). Non-atherosclerotic areas of thoracic aorta of 27 autopsy cases which had no particular aortic disease were obtained. After acid hydrolysis, SEP-PAK™ silica-gel column and Fe3+/activated charcoal column pretreatment were carried out for analysis of desmosine (DES), isodesmosine (ISDES), neodesmosine (NEO), oxodesmosine (OXO) and isooxodesmosine (ISOXO), and for analysis of aldosine (ALD), respectively. These prepared samples were applied to the reversed-phase HPLC column. We also analyzed pyridinoline (PYR), a major cross-linking amino acid of collagen as an index of fibrosis. All cross-linking amino acids of elastin rapidly increased in infancy and then gradually decreased with age. In the middle- and old-age, the amount of OXO showed marked variety. PYR was little detected at 0 year-old, and then gradually increased with age. The crosslinks of elastin were rapidly formed in childhood and then decreased with age. These findings suggest that the relative increase of NEO, OXO or ISOXO to DES and ISDES is associated with age-related weakening and/or damage of elastin, and that the gradual shift from elastin- to collagen-dominant state is a possible cause of the loss of elasticity and the gain of stiffness in the aging aorta.
  • Tomio Narisawa, Yoko Fukaura, Noritoshi Tanida, Makiko Hasebe, Michiko ...
    1996 年 180 巻 2 号 p. 131-138
    発行日: 1996年
    公開日: 2006/05/02
    ジャーナル フリー
    Potential chemopreventive action of de-escalated doses of pravastatin (Pr), an HMG-CoA reductase inhibitor, on 1,2-dimethyihydrazine · 2HCl (DMH)-induced colon tumorigenesis was evaluated in ICR mice. Thirty mice each in 4 groups received an intraperitoneal injection of 20 mg DMH/kg body weight once weekly for 10 weeks, and were given drinking water dissolved Pr at the concentration of 10 ppm, 5 ppm, 1 ppm or 0 ppm (control) throughout the experiment. The incidence of colon tumors examined at week 35 was significantly lower in the Pr-treated groups than the control group: 20%, 21% and 23% vs. 55%. However, the tumor multiplicity/tumor-bearing animal was increased in the Pr-treated groups compared to the control group. Of all the tumors, 66 were adenocarcinomas in the distal colon and 5 were squamous cell carcinomas at the anus. The Pr treatment showed no hypocholesterolemic effect but did significant decrease of colonic mucosal cholesterol. The results seems to suggest that a small dose of Pr may reduce the incidence of colon cancers, perhaps being related, at least in part, to modulation of cholesterol synthesis in situ at the colonic mucosa.
  • Morihiko Satoh, Koji Kobayashi, Motoyasu Ishii, Takehiko Igarashi, Tak ...
    1996 年 180 巻 2 号 p. 139-152
    発行日: 1996年
    公開日: 2006/05/02
    ジャーナル フリー
    Concanavalin A (Con A) can induce an immune-mediated hepatitis. Since direct evidence of immune mechanism for this hepatitis is lacking, we employed adoptive transfer to study the mechanism of Con A-induced hepatitis. Intravenous administration of Con A (20 mg/kg) to Balb/c mice was accompanied by elevations of serum alanine aminotransferase (ALT) levels and midzonal necrosis with lymphocyte infiltration in the liver. None of the Balb/c nu/nu mice showed biochemical or pathologic hepatic abnormalities with the same dose of Con A. In the area of midzonal necrosis, CD4-positive T lymphocytes appeared at 24 hr after injection, and then both CD4-positive and CD8-positive T lymphocytes were found at the margin of zonal necrosis at 48 hr. Pretreatment with carrageenan, a potent inhibitor of macrophages, prevented these biochemical and pathologic changes. Mononuclear cells infiltrating in the liver of Balb/c mice 24 hr after priming with Con A were harvested and injected into Balb/c nu/nu mice injected with Con A 24 hr previously. Serum ALT levels were elevated and the same pathologic changes observed in Con A-treated Balb/c mice were observed. These changes were not observed when the splenic cells from Con A-treated Balb/ c mice were transferred to Con A-treated nude mice. These results suggest that Con A-induced hepatic injury is mediated by macrophages and T lymphocytes sensitized by Con A or its metabolites.
  • Takehiko Fujisawa, Yutaka Yamaguchi, Yokio Saitoh, Yasuo Sekine, Toshi ...
    1996 年 180 巻 2 号 p. 153-160
    発行日: 1996年
    公開日: 2006/05/02
    ジャーナル フリー
    The results of pulmonary resection and clinical factors relating to long-term survival were evaluated in 29 patients with histologically proven pulmonary metastasis from colorectal carcinoma. The patients were followed up from 4 months to 120 months, with an average of 43.7 months. Overall 5- and 10-year survival rates were 41% and 34%, respectively. The 5- and 10-year survival rates in patients with metastatic nodules 30 cm or less in diameter were 77% and 58%, respectively, a significantly better result than in those with metastatic nodules over 30 mm in diameter. Survival in patients without nodal involvement was significantly better than that in patients with lymph node metastases. Multivariate analysis according to Cox proportional hazards model demonstrated that the size of the metastasis was an independent prognostic factor.
  • Mariko Kambe, Daisaku Arita, Hiroaki Kikuchi, Tadao Funato, Fumiaki Te ...
    1996 年 180 巻 2 号 p. 161-171
    発行日: 1996年
    公開日: 2006/05/02
    ジャーナル フリー
    Electroporation was applied in vitro and in vivo in the treatment of human colorectal cancer cell lines to study whether it can enhance the effect of bleomycin (BLM), 5-fluorouracil (5-FU) and cis-platinum (CDDP). We used LS174T and Colo320 cells derived from human colon cancer as target cells in this study. When the LS174T cells were used as target cells, the IC50 of BLM decreased to 10−3 times, while that of 5-FU decreased to only about one fifth with the application of electric current. In the case of the Co1o320 cells, the IC50 of BLM and 5-FU were about one hundredth and a half, respectively. The effect of CDDP was not enhanced with electric current. In vivo experiments were also performed using LS174T cells transplanted subcutaneously (s.c.) into nude mice. By treatment with intravenously (i.v.) administrated BLM and simultaneous application of the electric current, tumors were markedly decreased in size after three weeks.
  • Kazuhiko Shibuya, Makoto Sunamura, Jun-Ichiro Yamauchi, Kazunori Taked ...
    1996 年 180 巻 2 号 p. 173-186
    発行日: 1996年
    公開日: 2006/05/02
    ジャーナル フリー
    In order to clarify the derangement of the pancreatic microcirculation in acute pancreatitis, the pancreatic microcirculation in caerulein pancreatitis was monitored intravitally and the roles of bradykinin and nitric oxide were examined using bradykinin B2 receptor antagonist, HOE140. Under an intravital microscope, the pancreatic microcirculation was observed 2 or 6 hr after the induction of acute pancreatitis. HOE140 was administered 30 mm before the induction of acute pancreatitis. The videoimages were taken into the computer, and the value of grayscale was measured with imaging software to quantify the degree of extravasation. Extravasation in the postcapillary venules was remarkable and the velocity in pancreatic terminal arterioles decreased significantly. However, the adherence of leukocytes was not observed until 6 hr after the induction. Both the extension of extravasation and the decrease of velocity were prevented by HOE140. The levels of nitric oxides in the pancreatic tissue declined and this decline was not influenced by HOE140. Bradykinin participates mainly in the regulation of vascular permeability in the early stage of caerulein pancreatitis. Further, the impairment of pancreatic microcirculation may play a key role in the onset and development of acute pancreatitis.
Case Report
  • Shinji Sato, Akira Yajima, Noriko Kimura, Tsuneo Namiki, Nobuyuki Furu ...
    1996 年 180 巻 2 号 p. 187-195
    発行日: 1996年
    公開日: 2006/05/02
    ジャーナル フリー
    We report here a case of peripheral neuroepithelioma arising in the uterine cervix. A 44-year-old female had complained of irregular genital bleeding for several months and was diagnosed as extraosseous Ewing's sarcoma (EOE) from biopsy specimens initially. The tumor cells, which were intensely stained by periodic acid-Schiff (PAS) and digested with diastase, were uniformly small and round, had hyperchromatic nuclei and scant, indistinct cytoplasm. The surgically-removed tumor cells were immunohistochemically stained with antisera against neuro-specific enolase (NSE), tyrosine hydroxylase. In ultrastructural study, neurosecretory granules were observed. Finally we diagnosed this case as peripheral neuroepithelioma (peripheral primitive neuroectodermal tumor; PNET).
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