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排序方式: 共有1064条查询结果,搜索用时 15 毫秒
11.
Keisuke Yoshihama Hideki Mutai Mariko Sekimizu Fumihiro Ito Shin Saito Shintaro Nakamura Takuya Mikoshiba Ryoto Nagai Akiko Takebayashi Fuyuki Miya Kenjiro Kosaki Hiroyuki Ozawa Tatsuo Matsunaga 《Clinical genetics》2023,103(4):466-471
Carotid body tumor (CBT) is classified as a paraganglioma (PGL). Here, we report the genetic background, protein expression pattern, and clinical findings of 30 Japanese CBT cases. Germline pathogenic or likely pathogenic (P/LP) variants of genes encoding succinate dehydrogenase subunits (SDHs) were detected in 15 of 30 cases (50%). The SDHB variants were the most frequently detected, followed by SDHA and SDHD variants. One case with SDHAF2 variant was bilateral CBT, and other two multiple PGL cases were not detected P/LP variants. The three cases with germline variants that could be tested did not have somatic P/LP variants of the same genes. Immunohistochemical analysis showed negative SDHB signals in CBT tissues in five cases with germline P/LP variants of SDHB, SDHD, or SDHA. In addition, SDHB signals in CBT tissues were negative in four of nine cases without germline P/LP variants of SDHs. These findings suggest the involvement of unidentified molecular mechanisms affecting SDHs. 相似文献
12.
Matrix metalloproteinase-2 status in stromal fibroblasts, not in tumor cells, is a significant prognostic factor in non-small-cell lung cancer. 总被引:5,自引:0,他引:5
Shinya Ishikawa Kazumasa Takenaka Kazuhiro Yanagihara Ryo Miyahara Yozo Kawano Yosuke Otake Seiki Hasegawa Hiromi Wada Fumihiro Tanaka 《Clinical cancer research》2004,10(19):6579-6585
PURPOSE: The purpose is to assess clinical significance of matrix metalloproteinase (MMP)-2 and MMP-9 status, especially MMP-2 status, in stromal cells in non-small-cell lung cancer (NSCLC) because experimental studies have revealed that stromal MMP-2 plays important roles in progression of malignant tumors, but most clinical studies focused on tumoral MMP-2 expression, not stromal MMP-2 expression. EXPERIMENTAL DESIGN: We conducted a retrospective study on MMP-2 and MMP-9 expression as evaluated immunohistochemically in a total of 218 consecutive patients with completely resected pathological stage I-IIIA, NSCLC. RESULTS: Strong MMP-2 expression in tumor cells and stromal fibroblasts were documented in 54 (24.8%) and 132 (60.6%) patients, respectively. Strong MMP-2 expression in stromal fibroblasts was more frequently seen in squamous cell carcinoma (72.7%) than in adenocarcinoma (54.9%; P = 0.016). Tumors showing strong MMP-2 expression in stromal fibroblasts showed a significantly higher intratumoral microvessel density (IMVD) than weak stromal MMP-2 tumors (mean intratumoral microvessel density, 50.9 versus 32.4, P = 0.003). In addition, postoperative prognosis of strong stromal MMP-2 patients was significantly poorer than that of weak stromal MMP-2 patients (5-year survival rate, 77.5 versus 60.2%, P = 0.032), and the prognostic significance was enhanced in squamous cell carcinoma patients but disappeared in adenocarcinoma patients. Multivariate analyses confirmed that strong stromal MMP-2 expression was a significant factor to predict a poor prognosis in squamous cell carcinoma patients, not in adenocarcinoma patients. In contrast, MMP-2 or MMP-9 status in tumor cells was not a significant prognostic factor. CONCLUSIONS: MMP-2 status in stromal fibroblasts, not in tumor cells, was a significant prognostic factor associated with angiogenesis in NSCLC. 相似文献
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Consumption of wild boar linked to cases of hepatitis E 总被引:9,自引:0,他引:9
Tamada Y Yano K Yatsuhashi H Inoue O Mawatari F Ishibashi H 《Journal of hepatology》2004,40(5):869-870
16.
Hidenobu Kusuhara Fumihiro Hirayama Hirofumi Matsuyuki Masao Hisadome Yoshifumi Ikeda 《Journal of gastroenterology》1998,33(1):14-17
Mongolian gerbils are a laboratory host for gastric colonization with Helicobacter pylori, showing gastritis followed by typical gastric ulcer after infection with H. pylori. In such gerbils, we evaluated combined therapies of amoxicillin (AMPC) and clarithromycin (CAM) as antibiotics, and omeprazole
(OPZ) as a H+/K+ adenosine triphosphatase (ATPase) inhibitor. The gerbils were orally inoculated with 2 × 108 bacilli of H. pylori ATCC 43504. Four weeks after inoculation, the infected gerbils were orally treated singly with OPZ, AMPC, and CAM, and their
insufficient efficacy on bacterial clearance was confirmed by a polymerase chain reaction technique, and by a culture method.
In contrast, combined therapy of OPZ plus either AMPC or CAM showed significant bacterial clearance, demonstrating the efficacy
of this combined therapy in the gerbil model. Mongolian gerbils are suggested to be useful for the pharmacological evaluation
of anti-H. pylori compounds.
Received Mar. 11, 1997; accepted June 27, 1997 相似文献
17.
Masayuki Itoh Koji Kishi Hiroyuki Nakamura Hidekazu Hatao Kiwamu Kioi Akihiko Sudou Katsuyuki Kobayasi Fumihiro Tuchida Hideki Adachi Hisanaga Yagyuu Shuji Oh-ishi Takeshi Matsuoka 《Nihon Kokyūki Gakkai zasshi》2002,40(7):617-621
In this case, a 30-year-old man had been treated for chronic sinusitis and bronchiectasis since 2000, and presented at our outpatient clinic in May 2001 with chief complaints of massive yellow sputum expectoration and dyspnea. After he was admitted by our hospital, Pseudomonas aeruginosa bacteria were isolated at the rate of 10(8)/ml from his sputum culture. In electron-microscopic observation, the cilia of the bronchial epithelium were found to lack dynein arms. Semen examination revealed decreased sperm motility. Thus, the following diagnosis was made: diffuse bronchiectasis associated with the immotile-dyskinetic cilia syndrome, complicated with a P. aeruginosa infection. After the airway infection was ameliorated, 40 mg/day of clenbuterol hydrochloride was administered in combination with 250 mg of azithromycin, which was given twice a week, and which led to a markedly decreased frequency of exacerbation of airway infection. Moreover, chest CT scanning and respiratory function testing also indicated improvements. It was hypothesized that the decreased cilia motility due to P. aeruginosa-produced pyocyanin would be ameliorated with a b2 stimulant, and the inhibitory effect of a macrolide on the P. aeruginosa biofilm and production of pyocyanin would also be involved in the improvement of this case. 相似文献
18.
Nakae T Hirayama F Hashimoto M 《Kansenshōgaku zasshi. The Journal of the Japanese Association for Infectious Diseases》2002,76(3):195-202
Human intravenous immunoglobulin (IVIG) preparation containing a variety of antibodies is widely used against severe infectious diseases. Although IVIG is supposed to promote phagocytosis of opsonized bacteria and neutralize several bacterial toxins, it is unclear what antibodies are responsible for the effect in clinical use. In this study, we found that IVIG showed neutralizing activity against toxic shock syndrome toxin-1 (TSST-1), produced by methicillin-resistant Staphylococcus aureus (MRSA). Whereas intravenous inoculation with culture medium of MRSA 1945 strain into ICR mice causes immediate death, all of the mice survived in case of previous administration of IVIG. Such effect might be attributed to neutralization of TSST-1. Murine splenocytes incubated with TSST-1 (1.0 ng/mL) for 48 hours produced IFN-gamma. By addition of IVIG at 100 micrograms/mL into culture medium, production of IFN-gamma was completely inhibited. From IVIG, anti-TSST-1 antibody was purified by affinity chromatography as one of the effective antibodies. MRSA 1945 mixed with dextran-based microcarrier beads and injected subcutaneously into mice resulted in the formation of abscess and excretion of TSST-1 in serum for 14 days. IVIG and anti-TSST-1 antibody neutralized TSST-1 in blood 24 hours after infection, although bacterial count was kept constant. Experimental rabbit TSS model was established by synergism with lipopolysaccharide (LPS) of Escherichia coli. Anti-TSST-1 antibody protected NZW rabbits from lethal challenge with TSST-1 (1 microgram/kg, i.v.) 4 hours before LPS in a dose-dependent manner (10 micrograms/kg, i.v.), whereas all of the NZW rabbits died in the control group. Thus, IVIG may be a useful tool in the prevention and perhaps therapy of staphylococcal infections and TSS. 相似文献
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20.
Haemophagocytic lymphohistiocytosis, interferon-gamma-naemia and Epstein-Barr virus involvement 总被引:7,自引:0,他引:7
Shinsaku Imashuku Shigeyoshi Hibi Fumihiro Fujiwara Satoshi Ikushima Shinjiro Todo 《British journal of haematology》1994,88(3):656-658
Summary. To clarify the correlation between Epstein-Barr virus (EBV) involvement and hypercytokinaemia in haemophagocytic lymphohistiocytosis (HLH), we analysed serum interferon-gamma levels and EBV-DNA in biological specimens obtained from 25 HLH cases (23 children and two adults). We found that HLH patients showed a wide range of serum IFN-gamma levels from 0.2 to 1300 U/ml, with a median 126U/ml for EBV-DNA-positive (n = 9) and 4.5 U/ml for EBV-DNA-negative (n = 16) groups. The latter group could be classified further into a group with hyper-IFN-gamma-naemia (> 4.5 U/ml) (n = 8) and a group without hyper-IFN-gamma-naemia (n = 8). The survival of the hyper-IFN-gamma-naemic cases was significantly poorer than non-hyper-IFN-gamma-naemic cases. We conclude that EBV is probably involved in one third of the HLH cases, all of whom show hyper-IFN-gamma-naemia, and in the half of the HLH cases with hyper-IFN-gamma-naemia who have a rapidly fatal outcome. 相似文献