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排序方式: 共有3218条查询结果,搜索用时 15 毫秒
1.
Kazuko Sakai Takayuki Takahama Mototsugu Shimokawa Koichi Azuma Masayuki Takeda Terufumi Kato Haruko Daga Isamu Okamoto Hiroaki Akamatsu Shunsuke Teraoka Akira Ono Tatsuo Ohira Toshihide Yokoyama Nobuyuki Yamamoto Kazuhiko Nakagawa Kazuto Nishio 《Molecular oncology》2021,15(1):126
The WJOG8815L phase II clinical study involves patients with non‐small cell lung cancer (NSCLC) that harbored the EGFR T790M mutation, which confers resistance to EGFR tyrosine kinase inhibitors (TKIs). The purpose of this study was to assess the predictive value of monitoring EGFR genomic alterations in circulating tumor DNA (ctDNA) from patients with NSCLC that undergo treatment with the third‐generation EGFR‐TKI osimertinib. Plasma samples of 52 patients harboring the EGFR T790M mutation were obtained pretreatment (Pre), on day 1 of treatment cycle 4 (C4) or cycle 9 (C9), and at diagnosis of disease progression or treatment discontinuation (PD/stop). CtDNA was screened for EGFR‐TKI‐sensitizing mutations, the EGFR T790M mutation, and other genomic alterations using the cobas EGFR Mutation Test v2 (cobas), droplet digital PCR (ddPCR), and targeted deep sequencing. Analysis of the sensitizing—and T790M—EGFR mutant fractions (MFs) was used to determine tumor mutational burden. Both MFs were found to decrease during treatment, whereas rebound of the sensitizing EGFR MF was observed at PD/stop, suggesting that osimertinib targeted both T790M mutation‐positive tumors and tumors with sensitizing EGFR mutations. Significant differences in the response rates and progression‐free survival were observed between the sensitizing EGFR MF‐high and sensitizing EGFR MF‐low groups (cutoff: median) at C4. In conclusion, ctDNA monitoring for sensitizing EGFR mutations at C4 is suitable for predicting the treatment outcomes in NSCLC patients receiving osimertinib (Clinical Trial Registration No.: UMIN000022076).
Abbreviations
- CIs
- confidence intervals
- ctDNA
- circulating tumor DNA
- ddPCR
- droplet digital PCR
- EGFR
- epidermal growth factor receptor
- MFs
- mutant fractions
- NGS
- next‐generation sequencing
- NSCLC
- non‐small cell lung cancer
- ORR
- overall response rate
- OS
- overall survival
- PD
- progressive disease
- PFS
- progression‐free survival
- PR
- partial response
- SD
- stable disease
- TKI
- tyrosine kinase inhibitor
2.
Comparative safety study on severe anemia by simeprevir versus telaprevir‐based triple therapy for chronic hepatitis C 下载免费PDF全文
Eiichi Ogawa Norihiro Furusyo Eiji Kajiwara Hideyuki Nomura Akira Kawano Kazuhiro Takahashi Kazufumi Dohmen Takeaki Satoh Koichi Azuma Makoto Nakamuta Toshimasa Koyanagi Kazuhiro Kotoh Shinji Shimoda Jun Hayashi The Kyushu University Liver Disease Study Group 《Journal of gastroenterology and hepatology》2015,30(8):1309-1316
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Incidence of urethral stricture after bipolar transurethral resection of the prostate using TURis: results from a randomised trial 下载免费PDF全文
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This study was designed to examine human subjects' ability to discriminate between spatially different bite pressures. We measured actual bite pressure distribution when subjects simultaneously bit two silicone rubber samples with different hardnesses using their right and left incisors. They were instructed to compare the hardness of these two rubber samples and indicate which was harder (right or left). The correct-answer rates were statistically significant at P < 0.05 for all pairs of different right and left silicone rubber hardnesses. Simultaneous bite measurements using a multiple-point sheet sensor demonstrated that the bite force, active pressure and maximum pressure point were greater for the harder silicone rubber sample. The difference between the left and right was statistically significant (P < 0.05) for all pairs with different silicone rubber hardnesses. We demonstrated for the first time that subjects could perceive and discriminate between spatially different bite pressures during a single bite with incisors. Differences of the bite force, pressure and the maximum pressure point between the right and left silicone samples should be sensory cues for spatial hardness discrimination. 相似文献
8.
The study of teeth,dentition and occlusion is helpful to guide oral medical clinic and the study of anthropology.Our department of Osaka Dental University and had many items of research work about teeth,dentition and occlusion between Chinese and Japanese students.This article reports the study of Carabelli cusp.The results revealed:(1)the rate of Carabelli cusp is higher in Japanese than in Chinese and is higher in male than in female.(2)the rate of Carabelli cusp of the first maxillary molar of both side is very high.(3)The rate of Carabelli cusp is related to the height and the type of cusp numbers.These all illustrated the occurence of Carabeiil cusp were influenced by race, individual and the development of teeth. 相似文献
9.
Kusano H Tomofuji T Azuma T Sakamoto T Yamamoto T Watanabe T 《American journal of dentistry》2006,19(1):7-10
PURPOSE: To evaluate the effects of ultrasonic and/or vibration toothbrushes on cell proliferation and collagen synthesis. METHODS: In eight dogs, teeth and gingivae were stimulated once a day as follows: the first quadrant with an ultrasonic toothbrush (1.6 MHz); the second one with a mechanical vibratory toothbrush (141 Hz); and the third one with a toothbrush generating both the ultrasound and the vibration. The fourth quadrant served as a control. Proliferative activity and collagen synthesis of gingival cells were evaluated by assaying the expression of proliferating cell nuclear antigen (PCNA) and procollagen type I C-peptide (PIP), respectively. RESULTS: After 5 weeks, ultrasonic or vibratory toothbrushes increased the numbers of PCNA-positive fibroblasts and PIP-positive fibroblasts. Toothbrushing with a combination of ultrasound and mechanical vibration increased the numbers of PIP-positive fibroblasts, total fibroblasts and vascular endothelial cells to a greater extent than the one with only ultrasound alone. Vibratory toothbrush, but not the ultrasonic one, induced an increase in collagen density without gingival overgrowth. 相似文献
10.
Irie K Tomofuji T Tamaki N Sanbe T Ekuni D Azuma T Maruyama T Yamamoto T 《Journal of dental research》2008,87(5):456-460
Studies suggest a correlation between ethanol consumption and periodontal disease. We hypothesized that elevated levels of blood reactive oxygen species following ethanol consumption may increase inflammation in periodontal tissue. Rats were divided into 4 groups (6-7 rats/group). Two groups were fed an ethanol-containing liquid diet, and 2 groups were fed a pair-fed control diet. In one of each dietary group, periodontitis was ligature-induced, while the other group was left unligated. Chronic ethanol feeding alone decreased the ratio of reduced/oxidized glutathione and increased 8-hydroxydeoxy-guanosine and tumor necrosis factor (TNF)-alpha levels in the gingiva. Blood hydroperoxides were also increased. In ligature-induced periodontitis lesions, ethanol feeding enhanced polymorpho-nuclear leukocyte infiltration and TNF-alpha expression. The results suggest that chronic alcohol consumption increased periodontal inflammation, oxidative damage, and TNF-alpha production and had an additive effect on polymorphonuclear leukocyte infiltration and gingival oxidative damage, increasing the severity of periodontal inflammation in the ligature model. 相似文献