基本情報
- 所属
- 自治医科大学 消化器外科 教授
- 学位
- 医学博士(東京大学)
- J-GLOBAL ID
- 201801007452437948
- researchmap会員ID
- B000314953
Professor of Jichi Medical University
Department of Surgical Oncology
Research field is Tumor Biology and main clinical work is the treatment of peritoneal metastasis of gastric cancer (intraperitoneal chemotherapy).
Department of Surgical Oncology
Research field is Tumor Biology and main clinical work is the treatment of peritoneal metastasis of gastric cancer (intraperitoneal chemotherapy).
研究分野
1論文
601-
Cancer gene therapy 2024年10月10日This study explores a novel therapeutic approach for peritoneal metastasis (PM) using AAV-mediated delivery of tumor suppressor microRNA-29b (miR-29b) to peritoneal mesothelial cells (PMC). AAV serotypes 2 and DJ demonstrate high transduction efficiency for human and murine PMC, respectively. In vitro analysis indicates that AAV vectors encoding miR-29b precursor successfully elevate miR-29b expression in PMC and their secreted small extracellular vesicle (sEV), thereby inhibiting mesothelial mesenchymal transition and reducing subsequent attachment of tumor cells. A single intraperitoneal (IP) administration of AAV-DJ-miR-29b demonstrates robust and sustained transgene expression, suppressing peritoneal fibrosis and inhibiting the development of PM from gastric and pancreatic cancers. Additionally, AAV-DJ-miR-29b enhances the efficacy of IP chemotherapy using paclitaxel, restraining the growth of established PM. While conventional gene therapy for cancer encounters challenges targeting tumor cells directly but delivering miRNA to the tumor stroma offers a straightforward and efficient means of altering the microenvironment, leading to substantial inhibition of tumor growth. AAV-mediated miR-29b delivery to peritoneum via IP route presents a simple, minimally invasive, and promising therapeutic strategy for refractory PM.
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Cancers 16(16) 2841-2841 2024年8月14日Despite advances in systemic chemotherapy, patients with gastric cancer (GC) and peritoneal metastases (PMs) continue to have poor prognoses. Intraperitoneal (IP) administration of Paclitaxel (PTX) combined with systemic chemotherapy shows promise in treating PMs from GC. However, methods of drug administration need to be optimized to maximize efficacy. In this study, we utilized a mouse model with PMs derived from a human GC cell line, administering PTX either IP or intravenously (IV), and Carboplatin (CBDCA) IV 0, 1, and 4 days after PTX administration. The PMs were resected 30 min later, and concentrations of PTX and CBDCA in resected tumors were measured using liquid chromatography–tandem mass spectrometry (LC-MS/MS). Results indicated that PTX concentrations were higher with IP administration than with IV administration, with significant differences observed on days 0 and 1. CBDCA concentrations 4 days post-IP PTX administration were higher than with simultaneous IV PTX administration. These findings suggest that IP PTX administration enhances CBDCA concentration in peritoneal tumors. Therefore, sequential IV administration of anti-cancer drugs appears more effective than simultaneous administration with IP PTX, a strategy that may improve prognoses for patients with PMs.
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World Journal of Surgery 2024年6月24日Abstract Background Osteopenia reflects frailty and has been shown to be associated with outcomes in cancer patients. This study was undertaken to examine whether osteopenia is an independent prognostic factor in patients with esophageal cancer after resection. Methods A total of 214 patients who underwent surgery for esophageal cancer were analyzed retrospectively. Bone mineral density (BMD) of the 11th thoracic vertebra was measured by computed tomography scan, and patients classified into osteopenia and normal BMD groups with BMD <160 Hounsfield units as the cutoff. Clinicopathological data and prognosis were analyzed. Results The 5‐year survival rate was 55.4% for the osteopenia group and 74.7% for the normal BMD group with a significantly worse prognosis in the osteopenia group (p = 0.0080). In multivariable analysis, osteopenia was a significant independent risk factor associated with overall survival (hazard ratio [HR] 1.90, 95% confidence interval [CI] 1.27–3.34, and p = 0.0151) along with R1/2 resection (HR 3.02, 95% CI 1.71–5.18, and p = 0.0002). Conclusion In patients with esophageal cancer undergoing resection, osteopenia may be a surrogate marker for frailty and an independent predictor of prognosis.
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Cancers 16(11) 2087-2087 2024年5月30日Background: Osteopenia is a well-known risk factor for survival in patients with hepatocellular carcinoma; however, it is unclear whether osteopenia can apply to both genders and how osteopenia is associated with cancer progression. The aim of this study was to elucidate whether osteopenia predicts reduced survival in regression models in both genders and whether osteopenia is associated with the pathological factors associated with reduced survival. Methods: This study included 188 consecutive patients who underwent hepatectomy. Bone mineral density was assessed using computed tomography (CT) scan images taken within 3 months before surgery. Non-contrast CT scan images at the level of the 11th thoracic vertebra were used. The cutoff value of osteopenia was calculated using a threshold value of 160 Hounsfield units. Overall survival (OS) curves and recurrence-free survival (RFS) were constructed using the Kaplan–Meier method, as was a log-rank test for survival. The hazard ratio and 95% confidence interval for overall survival were calculated using Cox’s proportional hazard model. Results: In the regression analysis, age predicted bone mineral density. The association in females was greater than that in males. The OS and RFS of osteopenia patients were shorter than those for non-osteopenia patients. According to univariate and multivariate analyses, osteopenia was an independent risk factor for OS and RFS. The sole pathological factor associated with osteopenia was microvascular portal vein invasion. Conclusion: Models suggest that osteopenia may predict decreased OS and RFS in patients undergoing resection of hepatocellular carcinoma due to the mechanisms mediated via microvascular portal vein invasion.
MISC
331-
CANCER RESEARCH 83(7) 2023年4月
講演・口頭発表等
1163-
日本外科系連合学会誌 2018年12月 日本外科系連合学会症例は48歳,女性.数日前からの血便を主訴に当院を受診した.腹部造影CTでは,腹腔内に腹水貯留やfree airは認められなかった.両側の卵巣には嚢胞成分を含む腫瘤性病変を認め,特に右卵巣は内部に高吸収域を有し直腸に近接していた.卵巣腫瘍による直腸浸潤もしくは直腸腫瘍による卵巣浸潤が疑われ,精査目的に同日緊急入院となった.下部消化管内視鏡を施行したところ,直腸Raに毛髪が付着した腫瘤が穿通している所見を認めた.卵巣奇形腫の直腸穿通が疑われたが腹膜炎所見を認めなかったため,待機的手術の方針とした.良悪性の鑑別が困難であったため,術中迅速病理所見により切除範囲を検討する方針とし,入院第9日目に手術を施行した.術中所見では両側の卵巣・直腸・子宮が一塊となっており両側附属器切除術・低位前方切除術・子宮全摘術を施行した.迅速病理では卵巣成熟嚢胞性奇形腫の診断であり,リンパ節郭清は行わず,手術終了とした.経過良好で術後10日目に退院となった.卵巣成熟嚢胞性奇形腫による消化管穿通例の報告は比較的稀である.良性症例だけでなく悪性症例も存在し,手術対応が異なるため,正確な術前術中診断が必要である.(著者抄録)
共同研究・競争的資金等の研究課題
51-
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日本学術振興会 科学研究費助成事業 2022年4月 - 2025年3月