1
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Shioi I, Ogawa H, Hosoi N, Yamaguchi A, Watanabe T, Nakazawa N, Shibasaki Y, Shiraishi T, Osone K, Okada T, Sano A, Sakai M, Sohda M, Shirabe K, Saeki H. Two-Team Transanal Total Mesorectal Excision and En Bloc Resection of the Lateral Pelvic Lymph Nodes, Main Iliac Vessels, and Pelvic Plexus for Locally Advanced Rectal Cancer With Lateral Lymph Node Metastasis. Surg Laparosc Endosc Percutan Tech 2024; 34:237-241. [PMID: 38421177 DOI: 10.1097/sle.0000000000001268] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2023] [Accepted: 01/18/2024] [Indexed: 03/02/2024]
Abstract
BACKGROUND Here, we describe the precise surgical technique for a novel procedure involving 2-team transanal total mesorectal excision with en bloc lateral pelvic lymph node (LPLN) dissection combined with resection of the involved main internal iliac vessels and pelvic plexus. METHODS From September 2020 to May 2023, 4 patients underwent the procedure at our hospital. RESULTS The operation time and blood loss were 272 to 412 minutes and 10 to 124 mL, respectively. No patients required conversion to open surgery or exhibited Clavien-Dindo grade III or worse postoperative complications, although 2 developed grade II urinary dysfunction. All surgical margins were negative. CONCLUSIONS Our novel 2-team method can facilitate safe and satisfactory surgery, even for highly advanced rectal cancer. The transanal approach offers excellent visibility and operability, even during LPLN and adjacent structure dissection. Furthermore, initial dissection of the distal branches of the iliac vessels prevents excessive lymphatic tissue congestion, facilitating easier, and clearer dissection.
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Affiliation(s)
- Ikuma Shioi
- Department of General Surgical Science, Gunma University Graduate School of Medicine, Maebashi, Gunma, Japan
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2
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Uchida S, Sohda M, Tateno K, Watanabe T, Shibasaki Y, Nakazawa N, Kuriyama K, Sano A, Yokobori T, Sakai M, Ogawa H, Shirabe K, Saeki H. Usefulness of the preoperative inflammation-based prognostic score and the ratio of visceral fat area to psoas muscle area on predicting survival for surgically resected adenocarcinoma of the esophagogastric junction. Esophagus 2024; 21:157-164. [PMID: 38112929 DOI: 10.1007/s10388-023-01034-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/07/2023] [Accepted: 11/17/2023] [Indexed: 12/21/2023]
Abstract
BACKGROUND Sarcopenic obesity is associated with gastrointestinal cancer prognosis through systemic inflammation. However, in patients with adenocarcinoma of the esophagogastric junction (AEG), the relationship between the inflammation-based prognostic score (IBPS), muscle loss, visceral fat mass, and prognosis has not been sufficiently evaluated. We investigated the prognostic value of the preoperative IBPS and the visceral fat area ratio to the psoas muscle area (V/P ratio) in patients with AEG undergoing surgery. METHODS We retrospectively analyzed 92 patients with AEG who underwent surgery. The prognostic value of the preoperative neutrophil-to-lymphocyte ratio, platelet-to-lymphocyte ratio (PLR), lymphocyte-to-monocyte ratio, systemic inflammation response index, C-reactive protein-to-albumin ratio, prognostic nutritional index, modified Glasgow Prognostic Score, and V/P ratio at the third lumbar vertebra was investigated using univariate and multivariate survival analyses. RESULTS Multivariate analysis revealed that a high pathological stage (p = 0.0065), high PLR (p = 0.0421), and low V/P ratio (p = 0.0053) were independent prognostic factors for poor overall survival (OS). When restricted to patients with body mass index (BMI) ≥ 25 kg/m2, a high V/P ratio was a poor prognostic factor (p = 0.0463) for OS. Conversely, when restricted to patients with BMI < 25 kg/m2, a low V/P ratio was a poor prognostic factor (p = 0.0021) for OS. CONCLUSIONS Both PLR and V/P ratios may be useful prognostic biomarkers in surgical cases of AEG. V/P ratio and BMI may provide an accurate understanding of the muscle and fat mass's precise nature and may help predict AEG prognosis.
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Affiliation(s)
- Shintaro Uchida
- Department of General Surgical Science, Gunma University Graduate School of Medicine, 3-39-22 Showa-machi, maebashi-shi, Gunma-ken, 371-8511, Japan
| | - Makoto Sohda
- Department of General Surgical Science, Gunma University Graduate School of Medicine, 3-39-22 Showa-machi, maebashi-shi, Gunma-ken, 371-8511, Japan.
| | - Kohei Tateno
- Department of General Surgical Science, Gunma University Graduate School of Medicine, 3-39-22 Showa-machi, maebashi-shi, Gunma-ken, 371-8511, Japan
| | - Takayoshi Watanabe
- Department of General Surgical Science, Gunma University Graduate School of Medicine, 3-39-22 Showa-machi, maebashi-shi, Gunma-ken, 371-8511, Japan
| | - Yuta Shibasaki
- Department of General Surgical Science, Gunma University Graduate School of Medicine, 3-39-22 Showa-machi, maebashi-shi, Gunma-ken, 371-8511, Japan
| | - Nobuhiro Nakazawa
- Department of General Surgical Science, Gunma University Graduate School of Medicine, 3-39-22 Showa-machi, maebashi-shi, Gunma-ken, 371-8511, Japan
| | - Kengo Kuriyama
- Department of General Surgical Science, Gunma University Graduate School of Medicine, 3-39-22 Showa-machi, maebashi-shi, Gunma-ken, 371-8511, Japan
| | - Akihiko Sano
- Department of General Surgical Science, Gunma University Graduate School of Medicine, 3-39-22 Showa-machi, maebashi-shi, Gunma-ken, 371-8511, Japan
| | - Takehiko Yokobori
- Department of General Surgical Science, Gunma University Graduate School of Medicine, 3-39-22 Showa-machi, maebashi-shi, Gunma-ken, 371-8511, Japan
| | - Makoto Sakai
- Department of General Surgical Science, Gunma University Graduate School of Medicine, 3-39-22 Showa-machi, maebashi-shi, Gunma-ken, 371-8511, Japan
| | - Hiroomi Ogawa
- Department of General Surgical Science, Gunma University Graduate School of Medicine, 3-39-22 Showa-machi, maebashi-shi, Gunma-ken, 371-8511, Japan
| | - Ken Shirabe
- Department of General Surgical Science, Gunma University Graduate School of Medicine, 3-39-22 Showa-machi, maebashi-shi, Gunma-ken, 371-8511, Japan
| | - Hiroshi Saeki
- Department of General Surgical Science, Gunma University Graduate School of Medicine, 3-39-22 Showa-machi, maebashi-shi, Gunma-ken, 371-8511, Japan
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Naito R, Shiraishi T, Hosoi N, Watanabe T, Shioi I, Shibasaki Y, Nakazawa N, Osone K, Okada T, Sano A, Sakai M, Ogawa H, Sohda M, Shirabe K, Saeki H. Squamous cell carcinoma of the anus successfully treated with multidisciplinary therapy for metachronous metastatic and local recurrences after DCF chemotherapy: a case report. Surg Case Rep 2024; 10:71. [PMID: 38526705 DOI: 10.1186/s40792-024-01873-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2023] [Accepted: 03/18/2024] [Indexed: 03/27/2024] Open
Abstract
BACKGROUND Docetaxel, cisplatin, and 5-fluorouracil (DCF) chemotherapy is reportedly an effective treatment strategy for squamous cell carcinoma of the anus (SCCA). However, studies regarding its use in Japanese patients remain scarce. CASE PRESENTATION Here, we present the case of an 82-year-old woman with SCCA, cStage IIIB. Chemoradiotherapy was initiated after colostomy of the anorectal mass; however, para-aortic lymph node recurrence was observed 3 months after treatment completion. Five courses of DCF chemotherapy were subsequently administered, resulting in a complete response (CR). Two years and 1 month later, the aortic lymph node was enlarged again, and the patient achieved CR again after radiotherapy. Nine months later, local recurrence was detected in the anal canal, and laparoscopic perineal rectal amputation was performed. The patient remains progression-free 5 years and 10 months after the initial treatment and 1 year and 7 months after the final treatment. CONCLUSIONS Our findings suggest that complementary treatment after DCF chemotherapy may be efficacious in Japanese patients with SCCA and help achieve CR. Despite occasional local recurrences, this approach may help achieve long-term progression-free survival.
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Affiliation(s)
- Ryozan Naito
- Department of General Surgical Science, Gunma University Graduate School of Medicine, 3-39-15, Showa-Machi, Maebashi, Gunma, 371-8511, Japan
| | - Takuya Shiraishi
- Department of General Surgical Science, Gunma University Graduate School of Medicine, 3-39-15, Showa-Machi, Maebashi, Gunma, 371-8511, Japan.
| | - Nobuhiro Hosoi
- Department of General Surgical Science, Gunma University Graduate School of Medicine, 3-39-15, Showa-Machi, Maebashi, Gunma, 371-8511, Japan
| | - Takayoshi Watanabe
- Department of General Surgical Science, Gunma University Graduate School of Medicine, 3-39-15, Showa-Machi, Maebashi, Gunma, 371-8511, Japan
| | - Ikuma Shioi
- Department of General Surgical Science, Gunma University Graduate School of Medicine, 3-39-15, Showa-Machi, Maebashi, Gunma, 371-8511, Japan
| | - Yuta Shibasaki
- Department of General Surgical Science, Gunma University Graduate School of Medicine, 3-39-15, Showa-Machi, Maebashi, Gunma, 371-8511, Japan
| | - Nobuhiro Nakazawa
- Department of General Surgical Science, Gunma University Graduate School of Medicine, 3-39-15, Showa-Machi, Maebashi, Gunma, 371-8511, Japan
| | - Katsuya Osone
- Department of General Surgical Science, Gunma University Graduate School of Medicine, 3-39-15, Showa-Machi, Maebashi, Gunma, 371-8511, Japan
| | - Takuhisa Okada
- Department of General Surgical Science, Gunma University Graduate School of Medicine, 3-39-15, Showa-Machi, Maebashi, Gunma, 371-8511, Japan
| | - Akihiko Sano
- Department of General Surgical Science, Gunma University Graduate School of Medicine, 3-39-15, Showa-Machi, Maebashi, Gunma, 371-8511, Japan
| | - Makoto Sakai
- Department of General Surgical Science, Gunma University Graduate School of Medicine, 3-39-15, Showa-Machi, Maebashi, Gunma, 371-8511, Japan
| | - Hiroomi Ogawa
- Department of General Surgical Science, Gunma University Graduate School of Medicine, 3-39-15, Showa-Machi, Maebashi, Gunma, 371-8511, Japan
| | - Makoto Sohda
- Department of General Surgical Science, Gunma University Graduate School of Medicine, 3-39-15, Showa-Machi, Maebashi, Gunma, 371-8511, Japan
| | - Ken Shirabe
- Department of General Surgical Science, Gunma University Graduate School of Medicine, 3-39-15, Showa-Machi, Maebashi, Gunma, 371-8511, Japan
| | - Hiroshi Saeki
- Department of General Surgical Science, Gunma University Graduate School of Medicine, 3-39-15, Showa-Machi, Maebashi, Gunma, 371-8511, Japan
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4
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Dorjkhorloo G, Erkhem-Ochir B, Shiraishi T, Sohda M, Okami H, Yamaguchi A, Shioi I, Komine C, Nakazawa N, Ozawa N, Shibasaki Y, Okada T, Osone K, Sano A, Sakai M, Ogawa H, Yokobori T, Shirabe K, Saeki H. Prognostic value of a modified‑immune scoring system in patients with pathological T4 colorectal cancer. Oncol Lett 2024; 27:104. [PMID: 38298428 PMCID: PMC10829066 DOI: 10.3892/ol.2024.14237] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2023] [Accepted: 12/13/2023] [Indexed: 02/02/2024] Open
Abstract
Tumor-infiltrating immune cells, such as lymphocytes and macrophages, have been associated with tumor aggressiveness, prognosis and treatment response in colorectal cancer (CRC). An immune scoring system, Immunoscore (IS), based on tumor-infiltrating T cells in stage I-III CRC, was used to predict prognosis. An alternative immune scoring signature of immune activation (SIA) reflects the balance between anti- and pro-tumoral immune components. The present study aimed to evaluate the prognostic value of modified IS (mIS) and modified SIA (mSIA) in locally advanced pathological T4 (pT4) CRC, including stage IV CRC. Immunohistochemical staining for immune cell markers, such as CD3 (pan-T cell marker), CD8 (anti-tumoral cytotoxic T cell marker) and CD163 (tumor-supportive macrophage marker), in specimens from patients with radically resected pT4 CRC at stages II-IV was performed. mIS levels in the T4 CRC cohort were not associated with prognosis. However, low mSIA levels were associated with low survival. Furthermore, low mSIA was an independent predictor of recurrence in patients with radically resected pT4 CRC. In patients with CRC who did not receive postoperative adjuvant chemotherapy, low mSIA was a major poor prognostic factor; however, this was not observed in patients receiving adjuvant chemotherapy. Evaluation of the tumor-infiltrating immune cell population could serve as a valuable marker of recurrence and poor prognosis in patients with locally advanced CRC. mSIA assessment after radical CRC resection may be promising for identifying high-risk patients with pT4 CRC who require aggressive adjuvant chemotherapy.
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Affiliation(s)
- Gendensuren Dorjkhorloo
- Department of General Surgical Science, Graduate School of Medicine, Gunma University, Maebashi, Gunma 371-8511, Japan
| | - Bilguun Erkhem-Ochir
- Division of Integrated Oncology Research, Gunma University Initiative for Advanced Research, Maebashi, Gunma 371-8511, Japan
| | - Takuya Shiraishi
- Department of General Surgical Science, Graduate School of Medicine, Gunma University, Maebashi, Gunma 371-8511, Japan
| | - Makoto Sohda
- Department of General Surgical Science, Graduate School of Medicine, Gunma University, Maebashi, Gunma 371-8511, Japan
| | - Haruka Okami
- Department of General Surgical Science, Graduate School of Medicine, Gunma University, Maebashi, Gunma 371-8511, Japan
| | - Arisa Yamaguchi
- Department of General Surgical Science, Graduate School of Medicine, Gunma University, Maebashi, Gunma 371-8511, Japan
| | - Ikuma Shioi
- Department of General Surgical Science, Graduate School of Medicine, Gunma University, Maebashi, Gunma 371-8511, Japan
| | - Chika Komine
- Department of General Surgical Science, Graduate School of Medicine, Gunma University, Maebashi, Gunma 371-8511, Japan
| | - Nobuhiro Nakazawa
- Department of General Surgical Science, Graduate School of Medicine, Gunma University, Maebashi, Gunma 371-8511, Japan
| | - Naoya Ozawa
- Department of General Surgical Science, Graduate School of Medicine, Gunma University, Maebashi, Gunma 371-8511, Japan
| | - Yuta Shibasaki
- Department of General Surgical Science, Graduate School of Medicine, Gunma University, Maebashi, Gunma 371-8511, Japan
| | - Takuhisa Okada
- Department of General Surgical Science, Graduate School of Medicine, Gunma University, Maebashi, Gunma 371-8511, Japan
| | - Katsuya Osone
- Department of General Surgical Science, Graduate School of Medicine, Gunma University, Maebashi, Gunma 371-8511, Japan
| | - Akihiko Sano
- Department of General Surgical Science, Graduate School of Medicine, Gunma University, Maebashi, Gunma 371-8511, Japan
| | - Makoto Sakai
- Department of General Surgical Science, Graduate School of Medicine, Gunma University, Maebashi, Gunma 371-8511, Japan
| | - Hiroomi Ogawa
- Department of General Surgical Science, Graduate School of Medicine, Gunma University, Maebashi, Gunma 371-8511, Japan
| | - Takehiko Yokobori
- Division of Integrated Oncology Research, Gunma University Initiative for Advanced Research, Maebashi, Gunma 371-8511, Japan
| | - Ken Shirabe
- Department of General Surgical Science, Graduate School of Medicine, Gunma University, Maebashi, Gunma 371-8511, Japan
| | - Hiroshi Saeki
- Department of General Surgical Science, Graduate School of Medicine, Gunma University, Maebashi, Gunma 371-8511, Japan
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5
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Sohda M, Hara K, Kuriyama K, Tateno K, Uchida S, Watanabe T, Shibasaki Y, Saito H, Nakazawa N, Sano A, Sakai M, Yokobori T, Ogawa H, Shirabe K, Saeki H. Effectiveness of Combination Chemotherapy With Docetaxel, Nedaplatin, and 5-Fluorouracil for Advanced and Recurrent Esophageal Cancer. Anticancer Res 2024; 44:1309-1315. [PMID: 38423646 DOI: 10.21873/anticanres.16926] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/27/2023] [Revised: 02/04/2024] [Accepted: 02/05/2024] [Indexed: 03/02/2024]
Abstract
BACKGROUND/AIM Chemotherapy and immunotherapy have been recently developed as potentially useful first-line treatments for unresectable, advanced, or recurrent esophageal cancer. We performed a retrospective study of the therapeutic effectiveness of triplet chemotherapy with docetaxel, nedaplatin, and 5-fluorouracil therapy for advanced, recurrent, and unresectable advanced esophageal cancer at our hospital and compared the regimen's results with those of current and possible future treatment options. PATIENTS AND METHODS The study cohort comprised 101 patients who received docetaxel, nedaplatin, and 5-fluorouracil for advanced or recurrent esophageal cancer at Gunma University from May 2008 to December 2017. We retrospectively evaluated the results of this combination chemotherapy and postulated future treatment strategies. RESULTS The overall response and disease control rates, the latter including stable disease, for docetaxel, nedaplatin, and 5-fluorouracil were 33.6% and 61.4%, respectively. The median overall survival and progression-free survival were 12.26 months and 5.1 months, respectively. In patients with recurrence, the median overall and progression-free survivals were 14.97 months (449 days) and 5.1 months (152 days), respectively. No study patients developed acute kidney injury and there were no treatment-related deaths. However, leukopenia and neutropenia were frequent hematologic toxicities. CONCLUSION Treatment with docetaxel, nedaplatin, and 5-fluorouracil for advanced or recurrent esophageal cancer is particularly useful for recurrent cases and has the advantage of not causing severe renal dysfunction.
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Affiliation(s)
- Makoto Sohda
- Department of General Surgical Science, Gunma University Graduate School of Medicine, Maebashi, Japan
| | - Keigo Hara
- Department of General Surgical Science, Gunma University Graduate School of Medicine, Maebashi, Japan
| | - Kengo Kuriyama
- Department of General Surgical Science, Gunma University Graduate School of Medicine, Maebashi, Japan
| | - Kouhei Tateno
- Department of General Surgical Science, Gunma University Graduate School of Medicine, Maebashi, Japan
| | - Shintaro Uchida
- Department of General Surgical Science, Gunma University Graduate School of Medicine, Maebashi, Japan
| | - Takayoshi Watanabe
- Department of General Surgical Science, Gunma University Graduate School of Medicine, Maebashi, Japan
| | - Yuta Shibasaki
- Department of General Surgical Science, Gunma University Graduate School of Medicine, Maebashi, Japan
| | - Hideyuki Saito
- Department of General Surgical Science, Gunma University Graduate School of Medicine, Maebashi, Japan
| | - Nobuhiro Nakazawa
- Department of General Surgical Science, Gunma University Graduate School of Medicine, Maebashi, Japan
| | - Akihiko Sano
- Department of General Surgical Science, Gunma University Graduate School of Medicine, Maebashi, Japan
| | - Makoto Sakai
- Department of General Surgical Science, Gunma University Graduate School of Medicine, Maebashi, Japan
| | - Takehiko Yokobori
- Department of General Surgical Science, Gunma University Graduate School of Medicine, Maebashi, Japan
| | - Hiroomi Ogawa
- Department of General Surgical Science, Gunma University Graduate School of Medicine, Maebashi, Japan
| | - Ken Shirabe
- Department of General Surgical Science, Gunma University Graduate School of Medicine, Maebashi, Japan
| | - Hiroshi Saeki
- Department of General Surgical Science, Gunma University Graduate School of Medicine, Maebashi, Japan
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6
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Naito R, Nakazawa N, Zennyoji D, Shimizu T, Hosoi N, Watanabe T, Shioi I, Shibasaki Y, Osone K, Okada T, Shiraishi T, Sano A, Sakai M, Ogawa H, Sohda M, Uraoka T, Shirabe K, Saeki H. Retrograde drainage for duodenal stump leakage using ileal decompression tube guided by double-balloon endoscopy: a novel case report. Surg Case Rep 2024; 10:44. [PMID: 38368309 PMCID: PMC10874345 DOI: 10.1186/s40792-024-01842-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2023] [Accepted: 02/08/2024] [Indexed: 02/19/2024] Open
Abstract
BACKGROUND Duodenal stump leakage is a serious post-gastrectomy complication, and there have been no reports on endoscopic drainage. CASE PRESENTATION We report a case of duodenal stump leakage after laparoscopic gastrectomy with Roux-en-Y reconstruction in a 68-year-old man. First-line conservative management was ineffective. Reoperation was performed because of severe abdominal pain and increased ascites. After reoperation, duodenal stump leakage recurred with bleeding from the anterior superior pancreaticoduodenal artery. Coil embolization and pigtail catheter insertion were performed. Furthermore, we retrogradely inserted an ileal tube for tube decompression near the duodenal stump using double-balloon endoscopy for effective drainage. After tube insertion, duodenal stump leakage decreased; on the 47th primary postoperative day, the patient was discharged. The primary postoperative course was uneventful after 1 year and 9 months of follow-up. CONCLUSIONS This is the first successful case of duodenal stump leakage treated with retrograde decompression tube insertion near the duodenal stump using double-balloon endoscopy.
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Affiliation(s)
- Ryozan Naito
- Department of General Surgical Science, Gunma University Graduate School of Medicine, 3-39-15, Showa-Machi, Maebashi, Gunma, 371-8511, Japan
| | - Nobuhiro Nakazawa
- Department of General Surgical Science, Gunma University Graduate School of Medicine, 3-39-15, Showa-Machi, Maebashi, Gunma, 371-8511, Japan.
| | - Dan Zennyoji
- Department of Gastroenterology and Hepatology, Gunma University Graduate School of Medicine, Maebashi, Japan
| | - Takehiro Shimizu
- Department of Gastroenterology and Hepatology, Gunma University Graduate School of Medicine, Maebashi, Japan
| | - Nobuhiro Hosoi
- Department of General Surgical Science, Gunma University Graduate School of Medicine, 3-39-15, Showa-Machi, Maebashi, Gunma, 371-8511, Japan
| | - Takayoshi Watanabe
- Department of General Surgical Science, Gunma University Graduate School of Medicine, 3-39-15, Showa-Machi, Maebashi, Gunma, 371-8511, Japan
| | - Ikuma Shioi
- Department of General Surgical Science, Gunma University Graduate School of Medicine, 3-39-15, Showa-Machi, Maebashi, Gunma, 371-8511, Japan
| | - Yuta Shibasaki
- Department of General Surgical Science, Gunma University Graduate School of Medicine, 3-39-15, Showa-Machi, Maebashi, Gunma, 371-8511, Japan
| | - Katsuya Osone
- Department of General Surgical Science, Gunma University Graduate School of Medicine, 3-39-15, Showa-Machi, Maebashi, Gunma, 371-8511, Japan
| | - Takuhisa Okada
- Department of General Surgical Science, Gunma University Graduate School of Medicine, 3-39-15, Showa-Machi, Maebashi, Gunma, 371-8511, Japan
| | - Takuya Shiraishi
- Department of General Surgical Science, Gunma University Graduate School of Medicine, 3-39-15, Showa-Machi, Maebashi, Gunma, 371-8511, Japan
| | - Akihiko Sano
- Department of General Surgical Science, Gunma University Graduate School of Medicine, 3-39-15, Showa-Machi, Maebashi, Gunma, 371-8511, Japan
| | - Makoto Sakai
- Department of General Surgical Science, Gunma University Graduate School of Medicine, 3-39-15, Showa-Machi, Maebashi, Gunma, 371-8511, Japan
| | - Hiroomi Ogawa
- Department of General Surgical Science, Gunma University Graduate School of Medicine, 3-39-15, Showa-Machi, Maebashi, Gunma, 371-8511, Japan
| | - Makoto Sohda
- Department of General Surgical Science, Gunma University Graduate School of Medicine, 3-39-15, Showa-Machi, Maebashi, Gunma, 371-8511, Japan
| | - Toshio Uraoka
- Department of Gastroenterology and Hepatology, Gunma University Graduate School of Medicine, Maebashi, Japan
| | - Ken Shirabe
- Department of General Surgical Science, Gunma University Graduate School of Medicine, 3-39-15, Showa-Machi, Maebashi, Gunma, 371-8511, Japan
| | - Hiroshi Saeki
- Department of General Surgical Science, Gunma University Graduate School of Medicine, 3-39-15, Showa-Machi, Maebashi, Gunma, 371-8511, Japan
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7
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Sano A, Sohda M, Hosoi N, Tateno K, Watanabe T, Nakazawa N, Shioi I, Shibasaki Y, Okada T, Osone K, Shiraishi T, Sakai M, Ogawa H, Okabe H, Shirabe K, Saeki H. A Novel Method for Thoracoscopic Overlap Esophagogastric Reconstruction With Pleural Closure following Minimally Invasive Ivor-Lewis Esophagectomy for Esophagogastric Junction Cancer. Surg Laparosc Endosc Percutan Tech 2024; 34:108-112. [PMID: 38091490 DOI: 10.1097/sle.0000000000001250] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2023] [Accepted: 11/09/2023] [Indexed: 02/04/2024]
Abstract
BACKGROUND Intrathoracic esophagogastric anastomosis following minimally invasive Ivor-Lewis esophagectomy is a technically demanding surgical technique that can result in serious intrathoracic infections when anastomotic leakage occurs. Herein, we report a novel side-overlap esophagogastric anastomosis with pleural closure for esophagogastric junction cancer. METHODS The 3 key points of our novel technique were the following: (1) overlap esophagogastric anastomosis and closure of the entry hole were all performed using a linear stapler; (2) the pleura was closed to separate the anastomotic site from the thoracic cavity; and (3) the mediastinal drain was inserted transhiatally from the abdominal cavity. RESULTS This modified anastomosis procedure was performed on 8 consecutive patients at our institution. The median overall/thoracoscopic operating time and estimated blood loss were 652.5/241.5 min and 89 mL, respectively. No mortality or serious postoperative complications occurred, and the median postoperative hospital stay was 22 days (range, 17 to 37 d). CONCLUSION This novel thoracoscopic overlap esophagogastric reconstruction procedure with pleural closure is safe and feasible.
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Affiliation(s)
- Akihiko Sano
- Department of General Surgical Science, Gunma University Graduate School of Medicine, Gunma, Japan
| | - Makoto Sohda
- Department of General Surgical Science, Gunma University Graduate School of Medicine, Gunma, Japan
| | - Nobuhiro Hosoi
- Department of General Surgical Science, Gunma University Graduate School of Medicine, Gunma, Japan
| | - Kohei Tateno
- Department of General Surgical Science, Gunma University Graduate School of Medicine, Gunma, Japan
| | - Takayoshi Watanabe
- Department of General Surgical Science, Gunma University Graduate School of Medicine, Gunma, Japan
| | - Nobuhiro Nakazawa
- Department of General Surgical Science, Gunma University Graduate School of Medicine, Gunma, Japan
| | - Ikuma Shioi
- Department of General Surgical Science, Gunma University Graduate School of Medicine, Gunma, Japan
| | - Yuta Shibasaki
- Department of General Surgical Science, Gunma University Graduate School of Medicine, Gunma, Japan
| | - Takuhisa Okada
- Department of General Surgical Science, Gunma University Graduate School of Medicine, Gunma, Japan
| | - Katsuya Osone
- Department of General Surgical Science, Gunma University Graduate School of Medicine, Gunma, Japan
| | - Takuya Shiraishi
- Department of General Surgical Science, Gunma University Graduate School of Medicine, Gunma, Japan
| | - Makoto Sakai
- Department of General Surgical Science, Gunma University Graduate School of Medicine, Gunma, Japan
| | - Hiroomi Ogawa
- Department of General Surgical Science, Gunma University Graduate School of Medicine, Gunma, Japan
| | - Hiroshi Okabe
- Department of Gastroenterological Surgery, New Tokyo Hospital, Chiba, Japan
| | - Ken Shirabe
- Department of General Surgical Science, Gunma University Graduate School of Medicine, Gunma, Japan
| | - Hiroshi Saeki
- Department of General Surgical Science, Gunma University Graduate School of Medicine, Gunma, Japan
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8
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Shiraishi T, Ogawa H, Naomi S, Shioi I, Shibasaki Y, Ozawa N, Osone K, Okada T, Sano A, Sakai M, Sohda M, Shirabe K, Saeki H. Surgical Techniques and Stoma-related Complications Associated With Emergency Stoma Creation. Anticancer Res 2023; 43:4189-4195. [PMID: 37648315 DOI: 10.21873/anticanres.16610] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2023] [Revised: 07/10/2023] [Accepted: 07/19/2023] [Indexed: 09/01/2023]
Abstract
BACKGROUND/AIM Determination of risk factors for stoma-related complications associated with emergency stoma creation may impact on reducing complications and improving the quality of life of ostomy patients; however, there are only few reports on stoma-related complications associated with emergency stoma creation. Our study aimed to identify risk factors associated with stoma-related complications after emergency surgery, and evaluate surgical techniques for good stoma creation in the emergency setting. PATIENTS AND METHODS A retrospective analysis of patient and surgical characteristics was performed in 104 consecutive patients who underwent ileostomy or colostomy as emergency surgery between January 2020 and December 2022 at the Gunma University Hospital. RESULTS Preoperative stoma site marking was performed in 70 (67.3%) patients. Colostomies and ileostomies were performed in 78 (75.0%) and 26 (25.0%) patients, respectively. The skin bridge technique was used in 13 (12.5%) patients. Stoma-related complications were diagnosed in 62 (59.6 %) patients, with peristomal skin disorders (47.1%) as the most common complication, followed by mucocutaneous separation (31.7%), and stoma retraction (19.2%). In the multivariate analysis, body mass index (BMI) [odds ratio (OR)=5.570, 95% confidence interval (CI)=1.233-25.167, p=0.026], skin bridge technique (OR=0.144, 95% CI=0.031-0.670, p=0.014), and stoma height (OR=0.134, 95% CI=0.038-0.469, p=0.002) were independent risk factors for stoma-related complications after emergency stoma creation. CONCLUSION In emergency stoma creation, higher BMI and lower stoma height are associated with stoma-related complications. Using the skin bridge technique could reduce the risk of stoma-related complications after emergency stoma creation.
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Affiliation(s)
- Takuya Shiraishi
- Department of General Surgical Science, Gunma University Graduate School of Medicine, Maebashi, Japan
| | - Hiroomi Ogawa
- Department of General Surgical Science, Gunma University Graduate School of Medicine, Maebashi, Japan
| | - Satoh Naomi
- Department of Nursing, Gunma University Hospital, Maebashi, Japan
| | - Ikuma Shioi
- Department of General Surgical Science, Gunma University Graduate School of Medicine, Maebashi, Japan
| | - Yuta Shibasaki
- Department of General Surgical Science, Gunma University Graduate School of Medicine, Maebashi, Japan
| | - Naoya Ozawa
- Department of General Surgical Science, Gunma University Graduate School of Medicine, Maebashi, Japan
| | - Katsuya Osone
- Department of General Surgical Science, Gunma University Graduate School of Medicine, Maebashi, Japan
| | - Takuhisa Okada
- Department of General Surgical Science, Gunma University Graduate School of Medicine, Maebashi, Japan
| | - Akihiko Sano
- Department of General Surgical Science, Gunma University Graduate School of Medicine, Maebashi, Japan
| | - Makoto Sakai
- Department of General Surgical Science, Gunma University Graduate School of Medicine, Maebashi, Japan
| | - Makoto Sohda
- Department of General Surgical Science, Gunma University Graduate School of Medicine, Maebashi, Japan;
| | - Ken Shirabe
- Department of General Surgical Science, Gunma University Graduate School of Medicine, Maebashi, Japan
| | - Hiroshi Saeki
- Department of General Surgical Science, Gunma University Graduate School of Medicine, Maebashi, Japan
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9
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Shiraishi T, Ogawa H, Yamaguchi A, Shioi I, Shibasaki Y, Komine C, Ozawa N, Osone K, Okada T, Sano A, Sakai M, Sohda M, Shirabe K, Saeki H. Two-team Total Mesorectal Excision and Lateral Pelvic Lymph Node Dissection Using Transanal Approach for Rectal Cancer: A Retrospective Study. Anticancer Res 2023; 43:3311-3319. [PMID: 37351984 DOI: 10.21873/anticanres.16507] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2023] [Revised: 05/15/2023] [Accepted: 05/16/2023] [Indexed: 06/25/2023]
Abstract
BACKGROUND/AIM Lateral lymph node dissection is a locally advanced rectal cancer treatment option. Despite its complexities, such as prolonged operative time and increased blood loss, a transanal approach with an abdominal approach may help mitigate these drawbacks. PATIENTS AND METHODS Between July 2013 and June 2022, 40 patients underwent radical laparoscopic surgery with lateral lymph node dissection for rectal cancer. Among them, 29 and 11 patients underwent total mesorectal excision and lateral lymph node dissection without transanal approach (conventional surgery) and with transanal approach (two-team surgery), respectively. The clinical findings, surgical outcomes, pathology results, and prognoses of conventional and two-team surgeries were retrospectively compared. RESULTS Compared to conventional surgery, two-team surgery involves increased organ and nerve resections, shorter operation time (286 vs. 548 min, p<0.001), and less blood loss (20 vs. 158 ml, p<0.001). Although postoperative complications were similar between groups, the two-team surgery group had a shorter hospital stay (p=0.006). Pathologically, all patients who underwent two-team surgery had a distal resection margin of at least 20 mm, and no recurrence was observed. With conventional surgery, 63.6% of patients had a 10-19 mm margin, and 36.4% had a margin of ≥20 mm, except for abdominoperineal resection. CONCLUSION Total mesorectal excision and lateral lymph node dissection with the transanal approach as a two-team surgery are safe and feasible. Two-team surgery resulted in better outcomes than conventional surgery regarding operative time, blood loss, shorter postoperative hospital stay, and adequate distal resection margin.
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Affiliation(s)
- Takuya Shiraishi
- Department of General Surgical Science, Gunma University Graduate School of Medicine, Maebashi, Japan
| | - Hiroomi Ogawa
- Department of General Surgical Science, Gunma University Graduate School of Medicine, Maebashi, Japan
| | - Arisa Yamaguchi
- Department of General Surgical Science, Gunma University Graduate School of Medicine, Maebashi, Japan
| | - Ikuma Shioi
- Department of General Surgical Science, Gunma University Graduate School of Medicine, Maebashi, Japan
| | - Yuta Shibasaki
- Department of General Surgical Science, Gunma University Graduate School of Medicine, Maebashi, Japan
| | - Chika Komine
- Department of General Surgical Science, Gunma University Graduate School of Medicine, Maebashi, Japan
| | - Naoya Ozawa
- Department of General Surgical Science, Gunma University Graduate School of Medicine, Maebashi, Japan
| | - Katsuya Osone
- Department of General Surgical Science, Gunma University Graduate School of Medicine, Maebashi, Japan
| | - Takuhisa Okada
- Department of General Surgical Science, Gunma University Graduate School of Medicine, Maebashi, Japan
| | - Akihiko Sano
- Department of General Surgical Science, Gunma University Graduate School of Medicine, Maebashi, Japan
| | - Makoto Sakai
- Department of General Surgical Science, Gunma University Graduate School of Medicine, Maebashi, Japan
| | - Makoto Sohda
- Department of General Surgical Science, Gunma University Graduate School of Medicine, Maebashi, Japan
| | - Ken Shirabe
- Department of General Surgical Science, Gunma University Graduate School of Medicine, Maebashi, Japan
| | - Hiroshi Saeki
- Department of General Surgical Science, Gunma University Graduate School of Medicine, Maebashi, Japan
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10
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Ozawa N, Yokobori T, Osone K, Katayama C, Suga K, Komine C, Shibasaki Y, Shiraishi T, Okada T, Kato R, Ogawa H, Sano A, Sakai M, Sohda M, Ojima H, Miyazaki T, Motegi Y, Ide M, Yao T, Kuwano H, Shirabe K, Saeki H. PD-L1 upregulation is associated with activation of the DNA double-strand break repair pathway in patients with colitic cancer. Sci Rep 2021; 11:13077. [PMID: 34158547 PMCID: PMC8219733 DOI: 10.1038/s41598-021-92530-3] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2021] [Accepted: 06/11/2021] [Indexed: 02/07/2023] Open
Abstract
Ulcerative colitis (UC) is a DNA damage-associated chronic inflammatory disease; the DNA double-strand break (DSB) repair pathway participates in UC-associated dysplasia/colitic cancer carcinogenesis. The DSB/interferon regulatory factor-1 (IRF-1) pathway can induce PD-L1 expression transcriptionally. However, the association of PD-L1/DSB/IRF-1 with sporadic colorectal cancer (SCRC), and UC-associated dysplasia/colitic cancer, remains elusive. Therefore, we investigated the significance of the PD-L1/DSB repair pathway using samples from 17 SCRC and 12 UC patients with rare UC-associated dysplasia/colitic cancer cases by immunohistochemical analysis. We compared PD-L1 expression between patients with SCRC and UC-associated dysplasia/colitic cancer and determined the association between PD-L1 and the CD8+ T-cell/DSB/IRF-1 axis in UC-associated dysplasia/colitic cancer. PD-L1 expression in UC and UC-associated dysplasia/colitic cancer was higher than in normal mucosa or SCRC, and in CD8-positive T lymphocytes in UC-associated dysplasia/colitic cancer than in SCRC. Moreover, PD-L1 upregulation was associated with γH2AX (DSB marker) and IRF-1 upregulation in UC-associated dysplasia/colitic cancer. IRF-1 upregulation was associated with γH2AX upregulation in UC-associated dysplasia/colitic cancer but not in SCRC. Multicolour immunofluorescence staining validated γH2AX/IRF-1/PD-L1 co-expression in colitic cancer tissue sections. Thus, immune cell-induced inflammation might activate the DSB/IRF-1 axis, potentially serving as the primary regulatory mechanism of PD-L1 expression in UC-associated carcinogenesis.
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Affiliation(s)
- Naoya Ozawa
- Department of General Surgical Science, Graduate School of Medicine, Gunma University, Maebashi, Gunma, Japan
| | - Takehiko Yokobori
- Division of Integrated Oncology Research, Gunma University Initiative for Advanced Research (GIAR), 3-39-22 Showa-machi, Maebashi, Gunma, 371-8511, Japan.
| | - Katsuya Osone
- Department of General Surgical Science, Graduate School of Medicine, Gunma University, Maebashi, Gunma, Japan
| | - Chika Katayama
- Department of General Surgical Science, Graduate School of Medicine, Gunma University, Maebashi, Gunma, Japan
| | - Kunihiko Suga
- Department of General Surgical Science, Graduate School of Medicine, Gunma University, Maebashi, Gunma, Japan
| | - Chika Komine
- Department of General Surgical Science, Graduate School of Medicine, Gunma University, Maebashi, Gunma, Japan
| | - Yuta Shibasaki
- Department of General Surgical Science, Graduate School of Medicine, Gunma University, Maebashi, Gunma, Japan
| | - Takuya Shiraishi
- Department of General Surgical Science, Graduate School of Medicine, Gunma University, Maebashi, Gunma, Japan
| | - Takuhisa Okada
- Department of General Surgical Science, Graduate School of Medicine, Gunma University, Maebashi, Gunma, Japan
| | - Ryuji Kato
- Department of General Surgical Science, Graduate School of Medicine, Gunma University, Maebashi, Gunma, Japan
| | - Hiroomi Ogawa
- Department of General Surgical Science, Graduate School of Medicine, Gunma University, Maebashi, Gunma, Japan
| | - Akihiko Sano
- Department of General Surgical Science, Graduate School of Medicine, Gunma University, Maebashi, Gunma, Japan
| | - Makoto Sakai
- Department of General Surgical Science, Graduate School of Medicine, Gunma University, Maebashi, Gunma, Japan
| | - Makoto Sohda
- Department of General Surgical Science, Graduate School of Medicine, Gunma University, Maebashi, Gunma, Japan
| | - Hitoshi Ojima
- Department of Gastroenterological Surgery, Gunma Prefectural Cancer Center, Ohta, Gunma, Japan
| | - Tatsuya Miyazaki
- Department of Gastroenterological Surgery, Maebashi Red Cross Hospital, Maebashi, Gunma, Japan
| | - Yoko Motegi
- Department of Gastroenterological Surgery, Maebashi Red Cross Hospital, Maebashi, Gunma, Japan
| | - Munenori Ide
- Department of Pathology Diagnosis, Maebashi Red Cross Hospital, Maebashi, Gunma, Japan
| | - Takashi Yao
- Department of Human Pathology, Graduate School of Medicine, Juntendo University, Bunkyo City, Tokyo, Japan
| | - Hiroyuki Kuwano
- Department of General Surgical Science, Graduate School of Medicine, Gunma University, Maebashi, Gunma, Japan
| | - Ken Shirabe
- Department of General Surgical Science, Graduate School of Medicine, Gunma University, Maebashi, Gunma, Japan
| | - Hiroshi Saeki
- Department of General Surgical Science, Graduate School of Medicine, Gunma University, Maebashi, Gunma, Japan
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11
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Shibasaki Y, Sohda M, Ogawa H, Katayama C, Ozawa N, Komine C, Suga K, Osone K, Okada T, Shiraishi T, Katoh R, Yokobori T, Sano A, Sakai M, Shirabe K, Saeki H. Bowel obstruction due to Chlamydia trachomatis: a case report and review of literature. Surg Case Rep 2021; 7:47. [PMID: 33590344 PMCID: PMC7883945 DOI: 10.1186/s40792-021-01130-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2020] [Accepted: 02/02/2021] [Indexed: 11/11/2022] Open
Abstract
Background Chlamydial infection is a difficult-to-diagnose type of sexually transmitted disease that occurs mainly in young people. We report a case of bowel obstruction caused by intrapelvic adhesions formed by chlamydial infection. Case presentation This patient was a 23-year-old woman who had been suffering from acute abdominal pain. She had been previously treated several times for intrapelvic abscesses and had a history of chlamydial infection. Endometriosis was thought to be the cause of her pelvic abscess based on endoscopic findings. Computed tomography demonstrated a small bowel obstruction caused by a pelvic abscess. However, the diagnosis could not be confirmed. She underwent laparoscopic surgery and was diagnosed with bowel obstruction due to adhesion of chlamydial infection based on the intraoperative findings and Chlamydia trachomatis antibody test. She was discharged 5 days after surgery. Conclusions It is necessary to consider the possibility of chlamydial infection as a cause for lower abdominal pain and unexplained bowel obstruction in female patients.
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Affiliation(s)
- Yuta Shibasaki
- Department of General Surgical Science, Division of Hepatobiliary and Pancreatic Surgery, Graduate School of Medicine, Gunma University, 3-39-22 Showa-Machi, Maebashi, Gunma, 371-8511, Japan
| | - Makoto Sohda
- Department of General Surgical Science, Division of Hepatobiliary and Pancreatic Surgery, Graduate School of Medicine, Gunma University, 3-39-22 Showa-Machi, Maebashi, Gunma, 371-8511, Japan.
| | - Hiroomi Ogawa
- Department of General Surgical Science, Division of Hepatobiliary and Pancreatic Surgery, Graduate School of Medicine, Gunma University, 3-39-22 Showa-Machi, Maebashi, Gunma, 371-8511, Japan
| | - Chika Katayama
- Department of General Surgical Science, Division of Hepatobiliary and Pancreatic Surgery, Graduate School of Medicine, Gunma University, 3-39-22 Showa-Machi, Maebashi, Gunma, 371-8511, Japan
| | - Naoya Ozawa
- Department of General Surgical Science, Division of Hepatobiliary and Pancreatic Surgery, Graduate School of Medicine, Gunma University, 3-39-22 Showa-Machi, Maebashi, Gunma, 371-8511, Japan
| | - Chika Komine
- Department of General Surgical Science, Division of Hepatobiliary and Pancreatic Surgery, Graduate School of Medicine, Gunma University, 3-39-22 Showa-Machi, Maebashi, Gunma, 371-8511, Japan
| | - Kunihiko Suga
- Department of General Surgical Science, Division of Hepatobiliary and Pancreatic Surgery, Graduate School of Medicine, Gunma University, 3-39-22 Showa-Machi, Maebashi, Gunma, 371-8511, Japan
| | - Katsuya Osone
- Department of General Surgical Science, Division of Hepatobiliary and Pancreatic Surgery, Graduate School of Medicine, Gunma University, 3-39-22 Showa-Machi, Maebashi, Gunma, 371-8511, Japan
| | - Takuhisa Okada
- Department of General Surgical Science, Division of Hepatobiliary and Pancreatic Surgery, Graduate School of Medicine, Gunma University, 3-39-22 Showa-Machi, Maebashi, Gunma, 371-8511, Japan
| | - Takuya Shiraishi
- Department of General Surgical Science, Division of Hepatobiliary and Pancreatic Surgery, Graduate School of Medicine, Gunma University, 3-39-22 Showa-Machi, Maebashi, Gunma, 371-8511, Japan
| | - Ryuji Katoh
- Department of General Surgical Science, Division of Hepatobiliary and Pancreatic Surgery, Graduate School of Medicine, Gunma University, 3-39-22 Showa-Machi, Maebashi, Gunma, 371-8511, Japan
| | - Takehiko Yokobori
- Department of General Surgical Science, Division of Hepatobiliary and Pancreatic Surgery, Graduate School of Medicine, Gunma University, 3-39-22 Showa-Machi, Maebashi, Gunma, 371-8511, Japan.,Innovative Medical Research Center, Gunma University Hospital, Graduate School of Medicine, Gunma University, 3-39-22 Showa-Machi, Maebashi, Gunma, 371-8511, Japan
| | - Akihiko Sano
- Department of General Surgical Science, Division of Hepatobiliary and Pancreatic Surgery, Graduate School of Medicine, Gunma University, 3-39-22 Showa-Machi, Maebashi, Gunma, 371-8511, Japan
| | - Makoto Sakai
- Department of General Surgical Science, Division of Hepatobiliary and Pancreatic Surgery, Graduate School of Medicine, Gunma University, 3-39-22 Showa-Machi, Maebashi, Gunma, 371-8511, Japan
| | - Ken Shirabe
- Department of General Surgical Science, Division of Hepatobiliary and Pancreatic Surgery, Graduate School of Medicine, Gunma University, 3-39-22 Showa-Machi, Maebashi, Gunma, 371-8511, Japan
| | - Hiroshi Saeki
- Department of General Surgical Science, Division of Hepatobiliary and Pancreatic Surgery, Graduate School of Medicine, Gunma University, 3-39-22 Showa-Machi, Maebashi, Gunma, 371-8511, Japan
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12
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Osone K, Ogawa H, Katayama C, Shibasaki Y, Suga K, Komine C, Ozawa N, Okada T, Shiraishi T, Katoh R, Sakai M, Sano A, Yokobori T, Matsumura N, Sohda M, Shirabe K, Saeki H. Outcomes of surgical treatment in patients with anorectal fistula cancer. Surg Case Rep 2021; 7:32. [PMID: 33496838 PMCID: PMC7838223 DOI: 10.1186/s40792-021-01118-6] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2020] [Accepted: 01/18/2021] [Indexed: 01/02/2023] Open
Abstract
Background No standard treatment for anorectal fistula cancer, such as multidisciplinary therapy, has been established due to the rarity of the disease. Herein, we investigated patients with cancer associated with anorectal fistula who underwent surgery to clarify the clinicopathological characteristics and to propose future perspectives for treatment strategies. Case presentation Seven patients with cancer associated with anorectal fistula who underwent rectal amputation in our institute were analyzed with regard to clinical characteristics, pathological findings, surgical results, and prognosis. Four cases had Crohn's disease as an underlying cause. All seven cases were diagnosed as advanced stage. Preoperative [18F]-fluoro-2-deoxy-d-glucose (FDG)-positron emission tomography/computed tomography (FDG-PET/CT) showed abnormal FDG accumulation in six cases including four mucinous adenocarcinomas. Three cases that received preoperative hyperthermo-chemoradiotherapy achieved pathological R0 resection. Postoperative recurrence was observed in four cases including three with Crohn's disease and one resulting in death. Conclusions Anorectal fistula cancer is rare and difficult to be diagnosed at early stages. Mucinous adenocarcinoma associated with anorectal fistula tends to exhibit abnormal FDG accumulation by FDG-PET/CT unlike common colorectal mucinous adenocarcinoma. Preoperative hyperthermo-chemoradiotherapy may be effective in obtaining pathological complete resection.
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Affiliation(s)
- Katsuya Osone
- Department of General Surgical Science, Graduate School of Medicine, Gunma University, 3-39-22 Showa-machi, Maebashi, 371-8511, Japan
| | - Hiroomi Ogawa
- Department of General Surgical Science, Graduate School of Medicine, Gunma University, 3-39-22 Showa-machi, Maebashi, 371-8511, Japan
| | - Chika Katayama
- Department of General Surgical Science, Graduate School of Medicine, Gunma University, 3-39-22 Showa-machi, Maebashi, 371-8511, Japan
| | - Yuta Shibasaki
- Department of General Surgical Science, Graduate School of Medicine, Gunma University, 3-39-22 Showa-machi, Maebashi, 371-8511, Japan
| | - Kunihiko Suga
- Department of General Surgical Science, Graduate School of Medicine, Gunma University, 3-39-22 Showa-machi, Maebashi, 371-8511, Japan
| | - Chika Komine
- Department of General Surgical Science, Graduate School of Medicine, Gunma University, 3-39-22 Showa-machi, Maebashi, 371-8511, Japan
| | - Naoya Ozawa
- Department of General Surgical Science, Graduate School of Medicine, Gunma University, 3-39-22 Showa-machi, Maebashi, 371-8511, Japan
| | - Takuhisa Okada
- Department of General Surgical Science, Graduate School of Medicine, Gunma University, 3-39-22 Showa-machi, Maebashi, 371-8511, Japan
| | - Takuya Shiraishi
- Department of General Surgical Science, Graduate School of Medicine, Gunma University, 3-39-22 Showa-machi, Maebashi, 371-8511, Japan
| | - Ryuji Katoh
- Department of General Surgical Science, Graduate School of Medicine, Gunma University, 3-39-22 Showa-machi, Maebashi, 371-8511, Japan
| | - Makoto Sakai
- Department of General Surgical Science, Graduate School of Medicine, Gunma University, 3-39-22 Showa-machi, Maebashi, 371-8511, Japan
| | - Akihiko Sano
- Department of General Surgical Science, Graduate School of Medicine, Gunma University, 3-39-22 Showa-machi, Maebashi, 371-8511, Japan
| | - Takehiko Yokobori
- Division of Integrated Oncology Research, Gunma University Initiative for Advanced Research (GIAR), Maebashi, Gunma, Japan
| | - Nozomi Matsumura
- Department of Human Pathology, Gunma University Graduate School of Medicine, Maebashi, Gunma, Japan
| | - Makoto Sohda
- Department of General Surgical Science, Graduate School of Medicine, Gunma University, 3-39-22 Showa-machi, Maebashi, 371-8511, Japan.
| | - Ken Shirabe
- Department of General Surgical Science, Graduate School of Medicine, Gunma University, 3-39-22 Showa-machi, Maebashi, 371-8511, Japan
| | - Hiroshi Saeki
- Department of General Surgical Science, Graduate School of Medicine, Gunma University, 3-39-22 Showa-machi, Maebashi, 371-8511, Japan
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13
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Sasaki H, Kotaki T, Fujimori A, Tsukamoto T, Suzuki E, Oishi Y, Shibasaki Y. Excellent performance of aromatic polyguanamines induced by multiple hydrogen bondable tetraazacalix[2]arene[2]-triazine ring in their main chain. RSC Adv 2020; 10:1361-1370. [PMID: 35494688 PMCID: PMC9047533 DOI: 10.1039/c9ra09136j] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2019] [Accepted: 12/19/2019] [Indexed: 11/21/2022] Open
Abstract
A series of poly(guanamine) (c-PG)s containing tetraazacalix[2]arene[2]-triazine (mPDA2CyC2) were successfully prepared by solution polycondensation of mPDA2CyC2 with various aromatic diamines in an aprotic organic solvent with a lithium chloride additive (5 wt%) at 150 °C for 6 hours. The number-average molecular weights (Mn)s of these c-PG polymers reached up to 31 500, with a relatively broad molecular weight distribution (Mw/Mn) of 5.3. They showed good solubility in aprotic organic solvents, such as N-methylpyrrolidone and N,N-dimethylacetamide at a concentration of 2 mg mL−1. The glass transition temperatures (Tg) of the c-PG polymers were in the range 359 °C–392 °C, approximately 160 °C higher than those of counterpart polymers (i.e., with no aza-calixarene-based PG (l-PG)). The coefficients of thermal expansion (CTEs) of the c-PG polymers were 29.7–48.1 ppm K−1 (at 100 °C–150 °C), much lower than those of l-PG samples, i.e., 59.1–85.1 ppm K−1. Transparent and almost colorless c-PG films were successfully prepared by a solution casting method, showing maximum tensile strength (σS), modulus (Eγ), and elongation at break (Eb) values of 151 MPa, 6.3 GPa, and 4.4%, respectively, for the c-PG polymer from mPDA2CyC2 and 4,4′-oxydianiline monomers. The corresponding l-PG film exhibited σS, Eγ, and Eb values of just 76 MPa, 5.4 GPa, and 1.6%, respectively. These outstanding thermal and mechanical properties of the c-PG polymers can be attributed to their multiple hydrogen bonding interaction between mPDA2CyC2 residues in the polymer backbone. This interaction was identified by infrared spectroscopy measurements at the broad absorption band around 3000–3400 cm−1. Poly(guanamine)s containing tetraazacalix[2]arene[2]triazine ring within the polymer main-chain show outstanding thermal and mechanical properties arisen from the multiple-hydrogen bond.![]()
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Affiliation(s)
- H Sasaki
- Department of Chemistry & Biological Sciences, Faculty of Science & Engineering, Iwate University 4-3-5 Ueda Morioka Iwate 020-8551 Japan
| | - T Kotaki
- Department of Chemistry & Biological Sciences, Faculty of Science & Engineering, Iwate University 4-3-5 Ueda Morioka Iwate 020-8551 Japan
| | - A Fujimori
- Graduate School of Science and Engineering, Saitama University 255 Shimo-okubo, Sakura-ku Saitama 338-8570 Japan
| | - T Tsukamoto
- Department of Chemistry & Biological Sciences, Faculty of Science & Engineering, Iwate University 4-3-5 Ueda Morioka Iwate 020-8551 Japan
| | - E Suzuki
- Department of Chemistry & Biological Sciences, Faculty of Science & Engineering, Iwate University 4-3-5 Ueda Morioka Iwate 020-8551 Japan
| | - Y Oishi
- Department of Chemistry & Biological Sciences, Faculty of Science & Engineering, Iwate University 4-3-5 Ueda Morioka Iwate 020-8551 Japan
| | - Y Shibasaki
- Department of Chemistry & Biological Sciences, Faculty of Science & Engineering, Iwate University 4-3-5 Ueda Morioka Iwate 020-8551 Japan
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14
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Yamaguchi S, Shida Y, Ihara K, Ogata H, Masuda N, Takita J, Shibasaki Y, Haga N, Nakajima M, Sasaki K, Tsuchioka T. Early Experiences of Transanal Endoscopic Microsurgery Using a Wound Retractor with Stable Pneumorectum for Rectal Neoplasia. Am Surg 2019. [DOI: 10.1177/000313481908500310] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Affiliation(s)
| | - Yosuke Shida
- Department of Surgery I Dokkyo Medical University Mibu, Japan
| | - Keisuke Ihara
- Department of Surgery I Dokkyo Medical University Mibu, Japan
| | - Hideo Ogata
- Department of Surgery I Dokkyo Medical University Mibu, Japan
| | - Norihiro Masuda
- Department of Surgery National Hospital Organization Utsunomiya Hospital Utsunomiya, Japan
| | - Junko Takita
- Department of Surgery National Hospital Organization Utsunomiya Hospital Utsunomiya, Japan
| | - Yuta Shibasaki
- Department of Surgery National Hospital Organization Utsunomiya Hospital Utsunomiya, Japan
| | - Norihiro Haga
- Department of Surgery National Hospital Organization Utsunomiya Hospital Utsunomiya, Japan
| | | | - Kinro Sasaki
- Department of Surgery I Dokkyo Medical University Mibu, Japan
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15
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Yamaguchi S, Shida Y, Ihara K, Ogata H, Masuda N, Takita J, Shibasaki Y, Haga N, Nakajima M, Sasaki K, Tsuchioka T. Early Experiences of Transanal Endoscopic Microsurgery Using a Wound Retractor with Stable Pneumorectum for Rectal Neoplasia. Am Surg 2019; 85:e142-e144. [PMID: 30947790] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
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16
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Ishijima A, Minamihata K, Yamaguchi S, Yamahira S, Ichikawa R, Kobayashi E, Iijima M, Shibasaki Y, Azuma T, Nagamune T, Sakuma I. Selective intracellular vaporisation of antibody-conjugated phase-change nano-droplets in vitro. Sci Rep 2017; 7:44077. [PMID: 28333127 PMCID: PMC5363066 DOI: 10.1038/srep44077] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2016] [Accepted: 01/31/2017] [Indexed: 12/25/2022] Open
Abstract
While chemotherapy is a major mode of cancer therapeutics, its efficacy is limited by systemic toxicities and drug resistance. Recent advances in nanomedicine provide the opportunity to reduce systemic toxicities. However, drug resistance remains a major challenge in cancer treatment research. Here we developed a nanomedicine composed of a phase-change nano-droplet (PCND) and an anti-cancer antibody (9E5), proposing the concept of ultrasound cancer therapy with intracellular vaporisation. PCND is a liquid perfluorocarbon nanoparticle with a liquid–gas phase that is transformable upon exposure to ultrasound. 9E5 is a monoclonal antibody targeting epiregulin (EREG). We found that 9E5-conjugated PCNDs are selectively internalised into targeted cancer cells and kill the cells dynamically by ultrasound-induced intracellular vaporisation. In vitro experiments show that 9E5-conjugated PCND targets 97.8% of high-EREG-expressing cancer cells and kills 57% of those targeted upon exposure to ultrasound. Furthermore, direct observation of the intracellular vaporisation process revealed the significant morphological alterations of cells and the release of intracellular contents.
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Affiliation(s)
- A Ishijima
- Department of Precision Engineering, School of Engineering, The University of Tokyo, Tokyo 113-8656, Japan
| | - K Minamihata
- Department of Applied Chemistry, Kyushu University, Fukuoka 819-0395, Japan.,Department of Chemistry &Biotechnology, School of Engineering, The University of Tokyo, Tokyo 113-8656, Japan
| | - S Yamaguchi
- Research Center for Advanced Science and Technology, The University of Tokyo, Tokyo 153-8904, Japan
| | - S Yamahira
- Department of Chemistry &Biotechnology, School of Engineering, The University of Tokyo, Tokyo 113-8656, Japan
| | - R Ichikawa
- Department of Precision Engineering, School of Engineering, The University of Tokyo, Tokyo 113-8656, Japan
| | - E Kobayashi
- Department of Precision Engineering, School of Engineering, The University of Tokyo, Tokyo 113-8656, Japan
| | - M Iijima
- Research Center for Advanced Science and Technology, The University of Tokyo, Tokyo 153-8904, Japan
| | - Y Shibasaki
- Research Center for Advanced Science and Technology, The University of Tokyo, Tokyo 153-8904, Japan
| | - T Azuma
- Center for Disease Biology and Integrative Medicine, The University of Tokyo, Tokyo 113-8656, Japan
| | - T Nagamune
- Department of Chemistry &Biotechnology, School of Engineering, The University of Tokyo, Tokyo 113-8656, Japan.,Department of Bioengineering, The University of Tokyo, Tokyo 113-8656, Japan
| | - I Sakuma
- Department of Precision Engineering, School of Engineering, The University of Tokyo, Tokyo 113-8656, Japan.,Department of Bioengineering, The University of Tokyo, Tokyo 113-8656, Japan.,Medical Device Development and Regulation Research Center, School of Engineering, The University of Tokyo, Tokyo 113-8656, Japan
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17
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Mori T, Masukawa S, Kikkawa T, Fujimori A, Satoh A, Matsumoto K, Jikei M, Oishi Y, Shibasaki Y. Rapid synthesis and properties of segmented block copolymers based on monodisperse aromatic poly(N-methyl benzamide) and poly(propylene oxide). RSC Adv 2017. [DOI: 10.1039/c7ra05161a] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Monodisperse aromatic N-methyl benzamide-based molecules (Mw/Mn = 1.02–1.04) with terephthalic acid at both sides (MABx–x) were rapidly prepared by a step-wise reaction using the reported one-pot dendrimer synthetic method.
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Affiliation(s)
- T. Mori
- Department of Chemistry & Biological Sciences
- Faculty of Science & Engineering
- Iwate University
- Iwate 020-8551
- Japan
| | - S. Masukawa
- Department of Chemistry & Biological Sciences
- Faculty of Science & Engineering
- Iwate University
- Iwate 020-8551
- Japan
| | - T. Kikkawa
- Graduate School of Science and Engineering
- Saitama University
- Saitama 338-8570
- Japan
| | - A. Fujimori
- Graduate School of Science and Engineering
- Saitama University
- Saitama 338-8570
- Japan
| | - A. Satoh
- Department of Applied Chemistry
- Akita University
- Akita-shi
- Japan
| | - K. Matsumoto
- Department of Applied Chemistry
- Akita University
- Akita-shi
- Japan
| | - M. Jikei
- Department of Applied Chemistry
- Akita University
- Akita-shi
- Japan
| | - Y. Oishi
- Department of Chemistry & Biological Sciences
- Faculty of Science & Engineering
- Iwate University
- Iwate 020-8551
- Japan
| | - Y. Shibasaki
- Department of Chemistry & Biological Sciences
- Faculty of Science & Engineering
- Iwate University
- Iwate 020-8551
- Japan
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18
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Kotaki T, Nishimura N, Ozawa M, Fujimori A, Muraoka H, Ogawa S, Korenaga T, Suzuki E, Oishi Y, Shibasaki Y. Synthesis of highly refractive and highly fluorescent rigid cyanuryl polyimines with polycyclic aromatic hydrocarbon pendants. Polym Chem 2016. [DOI: 10.1039/c5py01920f] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A series of rigid cyanuryl polyimines, polyguanamines (PGs) bearing polycyclic aromatic hydrocarbon pendants were successfully synthesized from 2-substituted 4,6-dichloro-1,3,5-triazine and aromatic diamine monomers.
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19
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Kawamoto K, Shibasaki Y, Sato S, Nemoto H, Takizawa J, Narita M, Tsuchida M, Sone H, Masuko M. Fatal tracheal aspergillosis during rituximab combined chemotherapy for diffuse large B-cell lymphoma that developed after lung transplantation. Transpl Infect Dis 2015; 17:872-5. [PMID: 26369902 DOI: 10.1111/tid.12458] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2015] [Revised: 08/11/2015] [Accepted: 08/18/2015] [Indexed: 12/20/2022]
Abstract
Invasive tracheal aspergillosis (ITA) is an infection that is unique to patients who have undergone lung transplantation (LT). Although the activity of this disease often appears on imaging, we encountered a case of ITA that became exacerbated, despite few computed tomography (CT) findings, during rituximab combined chemotherapy for diffuse large B-cell lymphoma. ITA developed during immunosuppressive therapy after LT. Because CT findings may show false-negative results, bronchoscopy is recommended for such cases.
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Affiliation(s)
- K Kawamoto
- Department of Hematology, Endocrinology and Metabolism, Faculty of Medicine, Niigata University, Niigata, Japan
| | - Y Shibasaki
- Division of Stem Cell Transplantation, Niigata University Medical and Dental Hospital, Niigata, Japan
| | - S Sato
- Department of Thoracic and Cardiovascular Surgery, Faculty of Medicine, Niigata University, Niigata, Japan
| | - H Nemoto
- Department of Hematology, Endocrinology and Metabolism, Faculty of Medicine, Niigata University, Niigata, Japan
| | - J Takizawa
- Department of Hematology, Endocrinology and Metabolism, Faculty of Medicine, Niigata University, Niigata, Japan
| | - M Narita
- Department of Hematology, Endocrinology and Metabolism, Faculty of Medicine, Niigata University, Niigata, Japan
| | - M Tsuchida
- Department of Thoracic and Cardiovascular Surgery, Faculty of Medicine, Niigata University, Niigata, Japan
| | - H Sone
- Department of Hematology, Endocrinology and Metabolism, Faculty of Medicine, Niigata University, Niigata, Japan
| | - M Masuko
- Division of Stem Cell Transplantation, Niigata University Medical and Dental Hospital, Niigata, Japan
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Sugiyama N, Murata T, Morishima Y, Fukuma Y, Shibasaki Y, Marshall L. THU0359 Treatment Pattern and Direct Cost of Biologics for Rheumatoid Arthritis (RA) Patients: A Real-World Analysis of Nationwide Japanese Claims Data. Ann Rheum Dis 2015. [DOI: 10.1136/annrheumdis-2015-eular.2980] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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21
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Yabu T, Shiba H, Shibasaki Y, Nakanishi T, Imamura S, Touhata K, Yamashita M. Stress-induced ceramide generation and apoptosis via the phosphorylation and activation of nSMase1 by JNK signaling. Cell Death Differ 2014; 22:258-73. [PMID: 25168245 PMCID: PMC4291487 DOI: 10.1038/cdd.2014.128] [Citation(s) in RCA: 78] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2013] [Revised: 07/14/2014] [Accepted: 07/15/2014] [Indexed: 12/20/2022] Open
Abstract
Neutral sphingomyelinase (nSMase) activation in response to environmental stress or inflammatory cytokine stimuli generates the second messenger ceramide, which mediates the stress-induced apoptosis. However, the signaling pathways and activation mechanism underlying this process have yet to be elucidated. Here we show that the phosphorylation of nSMase1 (sphingomyelin phosphodiesterase 2, SMPD2) by c-Jun N-terminal kinase (JNK) signaling stimulates ceramide generation and apoptosis and provide evidence for a signaling mechanism that integrates stress- and cytokine-activated apoptosis in vertebrate cells. An nSMase1 was identified as a JNK substrate, and the phosphorylation site responsible for its effects on stress and cytokine induction was Ser-270. In zebrafish cells, the substitution of Ser-270 for alanine blocked the phosphorylation and activation of nSMase1, whereas the substitution of Ser-270 for negatively charged glutamic acid mimicked the effect of phosphorylation. The JNK inhibitor SP600125 blocked the phosphorylation and activation of nSMase1, which in turn blocked ceramide signaling and apoptosis. A variety of stress conditions, including heat shock, UV exposure, hydrogen peroxide treatment, and anti-Fas antibody stimulation, led to the phosphorylation of nSMase1, activated nSMase1, and induced ceramide generation and apoptosis in zebrafish embryonic ZE and human Jurkat T cells. In addition, the depletion of MAPK8/9 or SMPD2 by RNAi knockdown decreased ceramide generation and stress- and cytokine-induced apoptosis in Jurkat cells. Therefore the phosphorylation of nSMase1 is a pivotal step in JNK signaling, which leads to ceramide generation and apoptosis under stress conditions and in response to cytokine stimulation. nSMase1 has a common central role in ceramide signaling during the stress and cytokine responses and apoptosis.
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Affiliation(s)
- T Yabu
- Nihon University, College of Bioresource Sciences, 1866 Kameino, Fujisawa, Kanagawa 252-0880, Japan
| | - H Shiba
- Nihon University, College of Bioresource Sciences, 1866 Kameino, Fujisawa, Kanagawa 252-0880, Japan
| | - Y Shibasaki
- Nihon University, College of Bioresource Sciences, 1866 Kameino, Fujisawa, Kanagawa 252-0880, Japan
| | - T Nakanishi
- Nihon University, College of Bioresource Sciences, 1866 Kameino, Fujisawa, Kanagawa 252-0880, Japan
| | - S Imamura
- Food Safety Assessment Research Group, National Research Institute of Fisheries Science, 12-4 Fukuura 2, Kanazawa-ku, Yokohama, Kanagawa 236-8648, Japan
| | - K Touhata
- Food Safety Assessment Research Group, National Research Institute of Fisheries Science, 12-4 Fukuura 2, Kanazawa-ku, Yokohama, Kanagawa 236-8648, Japan
| | - M Yamashita
- Food Safety Assessment Research Group, National Research Institute of Fisheries Science, 12-4 Fukuura 2, Kanazawa-ku, Yokohama, Kanagawa 236-8648, Japan
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Sugiyama N, Murata T, Morishima Y, Fukuma Y, Shibasaki Y, Bidad C, Harnett J, Marshall L, Coindreau J. FRI0217 Cost-Effectiveness of BIOLOGICS for Rheumatoid Arthritis Patients: A Real-World Analysis of Nationwide Japanese Claims Data. Ann Rheum Dis 2014. [DOI: 10.1136/annrheumdis-2014-eular.2920] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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24
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Abstract
ACI-rats are considered as a model for studying urogenital abnormalities. In order to recognise cytogenetic changes related to these abnormalities 50 male ACI/Seg rats were examined by means of gross macroscopic, histological, and karyotypical investigations. In six of the examined animals (12%) unilateral agenesis of the kidney and ipsilateral hypoplasia of the testes and seminal vesicles were observed. Isochromosome 8 and trisomy 8 (i8, +8) were observed in 26.5% of karyotypes from the animals with kidney agenesis. Chromosome heteromorphisms such as 1p+, 3p+, 11p+, 12p+ were found in animals with and without apparent pathology. Because of the similarity between the phenotypical changes found in ACI-rats and in patients with familial renal agenesis (Potter's syndrome) and hereditary renal agenesis and aplasia (HRA), rat and human chromosomes associated with manifested renal malformations were examined by comparative cytogenetics and gene mapping.
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Affiliation(s)
- M Kneidl
- Department of Histodiagnostic, German Cancer Research Center, Heidelberg, FRG
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25
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Affiliation(s)
- Y Shibasaki
- Human Genetics Unit, Western General Hospital, Edinburgh, Scotland
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26
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Sugawara Y, Kadono E, Suzuki A, Yukuta Y, Shibasaki Y, Nishimura N, Kameyama Y, Hirota M, Ishida C, Higuchi N, Haramoto K, Sakai Y, Soda H. Hemichrome formation observed in human haemoglobin A under various buffer conditions. Acta Physiol Scand 2003; 179:49-59. [PMID: 12940938 DOI: 10.1046/j.1365-201x.2003.01142.x] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
AIM To observe hemichrome formation in human haemoglobin A under various buffer conditions. METHOD Hemichrome formation of human oxyhaemoglobin A (HbO2) was studied spectrophotometrically in 0.1 m buffer at various temperatures and pH values. RESULTS Following autoxidation in ferrous HbO2, it was evident that formation of hemichrome, which tends to precipitate, occurred at various stages during the course of the autoxidation reaction namely at initial, intermediate or final stages, depending on temperature and pH of the solution. By varying temperature of the solution from 35 to 55 degrees C and pH from 4.5 to 10.5, it is shown here that HbO2 exhibits high susceptibility for hemichrome formation and its occurrence is a function of pH, temperature and progress of autoxidation of HbO2. Unlike HbO2 and its separated haemoglobin chains, monomeric bovine heart myoglobin (MbO2) did not easily form hemichrome. CONCLUSION These findings provide a clue on the crucial role of haemoglobin molecule for senescent cell recognition or homeostasis in the blood circulation.
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Affiliation(s)
- Y Sugawara
- Department of Health Science, Hiroshima Prefectural Women's University, Health Science, Hiroshima, Japan
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27
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Nakano H, Watahiki J, Kubota M, Maki K, Shibasaki Y, Hatcher D, Miller AJ. Micro X-ray computed tomography analysis for the evaluation of asymmetrical condylar growth in the rat. Orthod Craniofac Res 2003; 6 Suppl 1:168-72; discussion 179-82. [PMID: 14606552 DOI: 10.1034/j.1600-0544.2003.252.x] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
OBJECTIVES To investigate the influence of forced lateral bite on mandibular growth, micro X-ray computed tomography (CT) was used for the purpose evaluating condylar cartilage and cancellous bone formation in 10 male Wister rats (3 weeks of age). SETTINGS AND SAMPLE POPULATION: The rats were divided into two groups--experimental and control. In experimental group, an inclined crown was cemented onto the maxillary incisors to produce 2.5 mm shift toward the left side during mastication. Right-left differences in whole mandibular length, mandibular height, condylar size, trabecular structure of the condylar head and three-dimensional (3-D) finite element analysis were assessed using 3-D images reconstructed from micro X-ray CT scans when the mice had reached 21 weeks. MEASUREMENTS AND RESULTS Asymmetrical growth was found in the experimental group, in which the left condylar head became thicker and shorter than the right condylar head during development. When comparing the left and right condyles of the experimental animals, histomorphometric analysis from micro X-ray CT showed that the bone volume (BV) of the cancellous bone, the surface area of the cancellous bone (BS), the BS/BV ratio, the BV fraction (BV/TV), and the trabecular thickness and trabecular number were less for the right condyle than for the left condyle. CONCLUSIONS These findings suggested that artificial changes in the mastication do influence the growth of condylar head, condylar bone trabecular structure, and mineralization.
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Affiliation(s)
- H Nakano
- Department of Orthodontics, Showa University, Tokyo, Japan.
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Usui T, Maki K, Toki Y, Shibasaki Y, Takanobu H, Takanishi A, Hatcher D, Miller A. Measurement of mechanical strain on mandibular surface with mastication robot: influence of muscle loading direction and magnitude. Orthod Craniofac Res 2003; 6 Suppl 1:163-7; discussion 179-82. [PMID: 14606551 DOI: 10.1034/j.1600-0544.2003.250.x] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
OBJECTIVES To investigate the mechanical effects of mastication on the mandible, we developed computational controlled mastication robot system with human dry skull and analyzed the strain distribution on the mandibular bone surface. DESIGN In the mastication robot, the mandible was suspended by eight wires, which simulated masticatory muscles. A non-linear spring damper generated viscoelastic properties, and tension sensors for simulation of jaw reflection to avoid unusual biting force were applied as a biological feedback mechanism. By using this robot system, various patterns of muscle loading (change of wire direction and magnitude) were performed. RESULTS From the results, significant differences in the amount of principal strain and its distribution were demonstrated in each condition (ANOVA, post hoc test, and p < 0.05). The value of maximum principal strain ranged from 79.66 x 10(-6) [at anterior border of ramus (Buccal side), 128 N] to -1.42 x 10(-6) [at foramen mentale (Buccal side), 32 N]. CONCLUSION These results suggested that the muscle loading generated the mechanical strain on the mandibular bone surface and it was affected by the changes in loading direction and magnitude.
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Affiliation(s)
- T Usui
- Department of Orthodontics, Showa University, Tokyo, Japan.
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Kishimoto N, Mori Y, Nishiue T, Shibasaki Y, Iba O, Nose A, Uchiyama-Tanaka Y, Masaki H, Matsubara H, Iwasaka T. Renal blood flow measurement with contrast-enhanced harmonic ultrasonography: evaluation of dopamine-induced changes in renal cortical perfusion in humans. Clin Nephrol 2003; 59:423-8. [PMID: 12834173 DOI: 10.5414/cnp59423] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
BACKGROUND An accessible non-invasive method for evaluating renal regional blood flow in real time is highly desirable in the clinical setting. Recent progress in ultrasonography with microbubble contrast has allowed quantification of regional blood flow in animal models. AIMS Goal ofthis study was to establish a convenient contrast--enhanced harmonic ultrasonography (CEHU) method for evaluating renal cortical blood flow in humans. METHODS We carried out intermittent second harmonic imaging in 9 healthy volunteers. Pulse interval was progressively decreased from 4 s - 0.2 s during continuous venous infusion of the microbubble contrast agent. RESULTS Pulse interval versus CEHU-derived acoustic intensity plots provided microbubble velocity (MV) and fractional vascular volume (FVV) during renal cortical perfusion in humans. Low-dose dopamine infusion (2 microg/min/kg) resulted in a significant increase in MV which correlated well with the increase in total renal blood flow (RBF) determined by a conventional study of p-aminohippurate clearance (C(PAH)) (r = 0.956, p < 0.0001). Although FVV was not significantly increased, alterations in CEHU-derived renal cortical blood flow calculated by the products of MV and FVV were also correlated with alterations in total RBF (r = 0.969, p < 0.0001). Thus, low-dose dopamine infusion increases renal cortical blood flow observed in CEHU, mainly by increasing MV. CONCLUSIONS The present study shows that renal cortical blood flow in humans can be measured non-invasively by CEHU and that CEHU can be used for quantitatively evaluating changes induced by a therapeutic agent such as dopamine in flow velocity and in FVV.
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Affiliation(s)
- N Kishimoto
- Renal Division, Department of Medicine II, Kansai Medical University, Osaka, Japan
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Ishii M, Okazaki M, Shibasaki Y, Ueda M, Teranishi T. Convenient synthesis of aliphatic polyesters by distannoxane-catalyzed polycondensation. Biomacromolecules 2003; 2:1267-70. [PMID: 11777402 DOI: 10.1021/bm015576a] [Citation(s) in RCA: 82] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A convenient synthesis of aliphatic polyesters by the distannoxane-catalyzed polycondensation of aliphatic dicarboxylic acids and aliphatic diols in solvents under azeotropic conditions was developed. To determine the optimum conditions for polycondensation of succinic acid with 1,4-butandiol, the effect of various types of catalyst and their concentration was investigated. By choosing the appropriate solvent, the polymerization was made to proceed in a two-phase system of solvent and molten polymer, and in the presence of 0.001 mol % of 1-chloro-3-hydroxy-1,1,3,3-tetrabutyldistannoxane (CHTD), poly(butylene succinate) (PBS) with a weight-average molecular weight of 277,000 was obtained. This method was then successfully applied to the synthesis of various aliphatic polyesters, such as poly(ethylene succinate), poly(1,4-cyclohexanedimethylene succinate), and poly(ethylene sebacate).
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Affiliation(s)
- M Ishii
- Department of Organic and Polymeric Materials, Graduate School of Science and Engineering, Tokyo Istitute of Technology, Japan
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31
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Iimori H, Ando S, Shibasaki Y, Ueda M, Kishimura S, Endo M, Sasago M. A New Photoresist Materials for 157nm Lithography-3: Poly [2-hydroxy-3-pinanyl vinyl sulfonate-co-4-(1,1,1,3,3,3-hexafluoro-2-hydroxypropyl)styrene]. J PHOTOPOLYM SCI TEC 2003. [DOI: 10.2494/photopolymer.16.601] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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32
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Iimori H, Shibasaki Y, Ueda M, Ishii H. A New Positive-working Alkaline developable Photoresist Based on Partially O-tert-butoxycarbonylmethylated-tetra-C-methylcalix[4]resorcinarene and a Photoacid Generator. J PHOTOPOLYM SCI TEC 2003. [DOI: 10.2494/photopolymer.16.685] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Nagai K, Shibasaki Y, Hasegawa K, Davies TA, Jacobs MR, Ubukata K, Appelbaum PC. Evaluation of PCR primers to screen for Streptococcus pneumoniae isolates and beta-lactam resistance, and to detect common macrolide resistance determinants. J Antimicrob Chemother 2001; 48:915-8. [PMID: 11733479 DOI: 10.1093/jac/48.6.915] [Citation(s) in RCA: 102] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Pneumococcal isolates (n = 148) from various countries (mostly from the USA) were tested by a primer set for PCR. Thirty-eight (86.4%) of the 44 penicillin G-susceptible isolates (MIC < or = 0.06 mg/L) had unaltered pbps, while six isolates (13.6%) had either one or two alterations in pbps. Of 47 penicillin G-resistant strains (MIC > or = 2 mg/L), 41 isolates (87.2%) had all three pbps altered, six isolates (12.8%) had altered pbp1a + 2x. Various combinations of altered pbp were seen in penicillin G-intermediate isolates. Prevalence of macrolide resistance genes mef(A) and erm(B) in isolates was clearly reflected by their MICs. All isolates were positive for lytA. The primers were useful for screening for Streptococcus pneumoniae and beta-lactam resistance, and for detection of common macrolide resistance determinants.
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Affiliation(s)
- K Nagai
- Department of Pathology (Clinical Microbiology), Hershey Medical Center, 500 University Drive, Hershey, PA 17033, USA.
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35
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Uchiyama-Tanaka Y, Matsubara H, Nozawa Y, Murasawa S, Mori Y, Kosaki A, Maruyama K, Masaki H, Shibasaki Y, Fujiyama S, Nose A, Iba O, Hasagawa T, Tateishi E, Higashiyama S, Iwasaka T. Angiotensin II signaling and HB-EGF shedding via metalloproteinase in glomerular mesangial cells. Kidney Int 2001; 60:2153-63. [PMID: 11737589 DOI: 10.1046/j.1523-1755.2001.00067.x] [Citation(s) in RCA: 67] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
BACKGROUND Angiotensin II (Ang II) has been implicated in the development of glomerulosclerosis by stimulating fibronectin (FN) synthesis. The processing and release of heparin binding-endothelin growth factor (HB-EGF) are activated by protein kinase C (PKC) and Ca2+ signaling. We studied the roles of HB-EGF and endothelial growth factor (EGF) receptor (EGFR) in Ang II-induced FN expression using mesangial cells. METHODS Mesangial cells were prepared from mouse kidneys by the explant method and cells were used at passages 4 and 5. RESULTS Ang II stimulated FN mRNA levels dose-dependently with a maximal increase (3.4-fold) after 12 hours of incubation. This action was completely inhibited by PKC inhibitors and slightly blocked by Ca2+ chelating agents. FN mRNA accumulation by Ang II was abolished by tyrosine kinase inhibitors, a specific inhibitor for EGFR (AG1478) and extracellular signal-regulated kinase (ERK) inactivation. Addition of neutralizing anti-HB-EGF antibody, as well as pretreatment with heparin or the metalloproteinase inhibitor batimastat abolished induction of FN expression by Ang II. In mesangial cells stably transfected with a chimeric construct containing HB-EGF and alkaline phosphatase (ALP) genes, ALP activity in incubation medium was rapidly increased by Ang II (1.7-fold at 0.5 min) and reached a 4.1-fold increase at two minutes. Ang II phosphorylated EGFR (maximal at 2 min) and ERK (maximal at 8 min) in a PKC- and metalloproteinase-dependent manner. Ang II stimulated the expression and release of transforming growth factor-beta (TGF-beta) via EGFR-mediated signaling, and the released TGF-beta also contributed to Ang II-mediated FN expression via EGFR transactivation. CONCLUSIONS Ang II-mediated FN expression was regulated by autocrine effects of HB-EGF and TGF-beta, suggesting a novel paradigm for cross-talk between Ang II and growth factor receptor signaling pathways.
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36
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Oshiro T, Shibasaki Y, Martin TJ, Sasaki T. Immunolocalization of vacuolar-type H+-ATPase, cathepsin K, matrix metalloproteinase-9, and receptor activator of NFkappaB ligand in odontoclasts during physiological root resorption of human deciduous teeth. Anat Rec 2001; 264:305-11. [PMID: 11596012 DOI: 10.1002/ar.1127] [Citation(s) in RCA: 62] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
To investigate the cellular mechanisms of physiological root resorption in human deciduous teeth, the authors examined the immunocytochemical localization of vacuolar-type H+-ATPase, a lysosomal cysteine proteinase, cathepsin K, matrix metalloproteinase-9 (MMP-9), and receptor activator of NFKB ligand (RANKL) in odontoclasts. H+-ATPase, cathepsin K, and MMP-9 are the most important enzymes for decalcification of apatite crystals and degradation of type-I collagen. In addition, RANKL is one of the key regulatory molecules in osteoclast formation and functions. Odontoclasts developed extensive ruffled borders and clear zones apposed to the resorbing root dentine surfaces. On immunoelectron microscopy, the expression of vacuolar-type H+-ATPase was detected along the limiting membranes of pale vacuoles and the ruffled border membranes of odontoclasts. Cathepsin K in odontoclasts was localized within pale vacuoles, lysosomes, the extracellular canals of ruffled borders, and the underlying resorbing dentine surfaces. MMP-9 localization in odontoclasts was similar to those of cathepsin K. RANKL was detected in both mononuclear stromal cells and odontoclasts located on resorbing dentine surfaces. These results suggest that (1) odontoclasts are directly involved in decalcification of apatite crystals by active extrusion of proton ions mediated by H+-ATPase and (2) extracellular degradation of dentine type-I collagen by both cathepsin K and MMP-9, and (3) odontoclast differentiation and activity are regulated, at least in part, by RANKL, possibly produced by mononuclear stromal cells and odontoclasts themselves in the resorbing tissues. Thus, the cellular mechanisms of physiological root resorption appear to be quite similar to those of osteoclastic bone resorption.
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Affiliation(s)
- T Oshiro
- Department of Orthodontics, Showa University School of Dentistry, 2-1-1 Kitasenzoku, Ohta-ku, Tokyo 145-8515, Japan
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37
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Goto S, Aoike I, Shibasaki Y, Morita T, Miyazaki S, Shimizu T, Suzuki M. A successfully treated case of disseminated tuberculosis-associated hemophagocytic syndrome and multiple organ dysfunction syndrome. Am J Kidney Dis 2001; 38:E19. [PMID: 11576906 DOI: 10.1053/ajkd.2001.27727] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
We report the case of a patient who presented with disseminated tuberculosis-associated hemophagocytic syndrome (HPS). A 40-year-old man was admitted because of fatigue, fever, and renal dysfunction. Chest radiograph and computed tomography scan showed diffuse reticulonodular shadow, and Mycobacterium tuberculosis was identified. Peripheral blood counts decreased rapidly, and bone marrow aspiration revealed hemophagocytosis by macrophages. Despite antituberculous and steroid pulse therapy, multiple organ dysfunction syndrome developed. After plasma exchange and continuous hemodiafiltration were started, hypercytokinemia and vital signs improved dramatically. Although disseminated tuberculosis-associated HPS carries a poor prognosis, acute blood purification may be an effective means of treating HPS involving multiple organ dysfunction syndrome.
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Affiliation(s)
- S Goto
- Departments of Medicine, Pathology, and Surgery, Shinrakuen Hospital, Niigata, Japan.
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38
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Ubukata K, Shibasaki Y, Yamamoto K, Chiba N, Hasegawa K, Takeuchi Y, Sunakawa K, Inoue M, Konno M. Association of amino acid substitutions in penicillin-binding protein 3 with beta-lactam resistance in beta-lactamase-negative ampicillin-resistant Haemophilus influenzae. Antimicrob Agents Chemother 2001; 45:1693-9. [PMID: 11353613 PMCID: PMC90533 DOI: 10.1128/aac.45.6.1693-1699.2001] [Citation(s) in RCA: 212] [Impact Index Per Article: 9.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
The affinity of [(3)H]benzylpenicillin for penicillin-binding protein (PBP) 3A was reduced in 25 clinical isolates of beta-lactamase-negative ampicillin (AMP)-resistant (BLNAR) Haemophilus influenzae for which the AMP MIC was > or =1.0 microg/ml. The affinities of PBP 3B and PBP 4 were also reduced in some strains. The sequences of the ftsI gene encoding the transpeptidase domain of PBP 3A and/or PBP 3B and of the dacB gene encoding PBP 4 were determined for these strains and compared to those of AMP-susceptible Rd strains. The BLNAR strains were classified into three groups on the basis of deduced amino acid substitutions in the ftsI gene, which is thought to be involved in septal peptidoglycan synthesis. His-517, near the conserved Lys-Thr-Gly (KTG) motif, was substituted for Arg-517 in group I strains (n = 9), and Lys-526 was substituted for Asn-526 in group II strains (n = 12). In group III strains (n = 4), three residues (Met-377, Ser-385, and Leu-389), positioned near the conserved Ser-Ser-Asn (SSN) motif, were replaced with Ile, Thr, and Phe, respectively, in addition to the replacement with Lys-526. The MICs of cephem antibiotics with relatively high affinities for PBP 3A and PBP 3B were higher than those of AMP and meropenem for group III strains. The MICs of beta-lactams for H. influenzae transformants into which the ftsI gene from BLNAR strains was introduced were as high as those for the donors, and PBP 3A and PBP 3B showed decreased affinities for beta-lactams. There was no clear relationship between 7-bp deletions in the dacB gene and AMP susceptibility. Even though mutations in another gene(s) may be involved in beta-lactam resistance, these data indicate that mutations in the ftsI gene are the most important for development of resistance to beta-lactams in BLNAR strains.
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Affiliation(s)
- K Ubukata
- Pharmaceutical Research Center, Meiji Seika Kaisha, Ltd., 760 Morookacho, Kohoku-ku, Yokohama, Japan.
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39
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Shibasaki Y, Matsubara H, Nozawa Y, Mori Y, Masaki H, Kosaki A, Tsutsumi Y, Uchiyama Y, Fujiyama S, Nose A, Iba O, Tateishi E, Hasegawa T, Horiuchi M, Nahmias C, Iwasaka T. Angiotensin II type 2 receptor inhibits epidermal growth factor receptor transactivation by increasing association of SHP-1 tyrosine phosphatase. Hypertension 2001; 38:367-72. [PMID: 11566906 DOI: 10.1161/01.hyp.38.3.367] [Citation(s) in RCA: 34] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Angiotensin (Ang) II has 2 major receptor isoforms, Ang type 1 (AT(1)) and Ang type (AT(2)). AT(1) transphosphorylates epidermal growth factor receptor (EGFR) to activate extracellular signal-regulated kinase (ERK). Although AT(2) was shown to inactivate ERK, the action of AT(2) on EGFR activation remains undefined. Using AT(2)-overexpressing vascular smooth muscle cells from AT(2) transgenic mice, we studied these undefined actions of AT(2). Maximal ERK activity induced by Ang II was increased 1.9- and 2.2-fold by AT(2) inhibition, which was abolished by orthovanadate but not okadaic acid or pertussis toxin. AT(2) inhibited AT(1)-mediated EGFR tyrosine phosphorylation by 63%. The activity of SHP-1 tyrosine phosphatase was significantly upregulated 1 minute after AT(2) stimulation and association of SHP-1 with EGFR was increased, whereas AT(2) failed to tyrosine phosphorylate SHP-1. Stable overexpression of SHP-1-dominant negative mutant completely abolished AT(2)-mediated inhibition of EGFR and ERK activation. AT(1)-mediated c-fos mRNA accumulation was attenuated by 48% by AT(2) stimulation. Induction of fibronectin gene containing an AP-1 responsive element in its 5'-flanking region was decreased by 37% after AT(2) stimulation, corresponding to the results of gel mobility assay with the AP-1 sequence of fibronectin as a probe. These findings suggested that AT(2) inhibits ERK activity by inducing SHP-1 activity, leading to decreases in AP-1 activity and AP-1-regulated gene expression, in which EGFR dephosphorylation plays an important role via association of SHP-1.
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MESH Headings
- Angiotensin II/pharmacology
- Animals
- Cells, Cultured
- ErbB Receptors/metabolism
- Fibronectins/genetics
- Gene Expression Regulation/drug effects
- Imidazoles/pharmacology
- Intracellular Signaling Peptides and Proteins
- Mice
- Mice, Transgenic
- Mitogen-Activated Protein Kinases/drug effects
- Mitogen-Activated Protein Kinases/metabolism
- Muscle, Smooth, Vascular/cytology
- Muscle, Smooth, Vascular/drug effects
- Muscle, Smooth, Vascular/metabolism
- Phosphorylation/drug effects
- Phosphotyrosine/drug effects
- Phosphotyrosine/metabolism
- Protein Binding/drug effects
- Protein Tyrosine Phosphatase, Non-Receptor Type 1
- Protein Tyrosine Phosphatase, Non-Receptor Type 11
- Protein Tyrosine Phosphatase, Non-Receptor Type 6
- Protein Tyrosine Phosphatases/metabolism
- Proto-Oncogene Proteins c-fos/genetics
- Pyridines/pharmacology
- RNA, Messenger/drug effects
- RNA, Messenger/genetics
- RNA, Messenger/metabolism
- Receptor, Angiotensin, Type 1
- Receptor, Angiotensin, Type 2
- Receptors, Angiotensin/genetics
- Receptors, Angiotensin/physiology
- Transcription Factor AP-1/drug effects
- Transcription Factor AP-1/metabolism
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Affiliation(s)
- Y Shibasaki
- Department of Medicine II, Kansai Medical University, Moriguchi, Osaka, Japan
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40
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Mori Y, Matsubara H, Nose A, Shibasaki Y, Masaki H, Kosaki A, Okigaki M, Fujiyama S, Tanaka-Uchiyama Y, Hasegawa T, Iba O, Tateishi E, Amano K, Iwasaka T. Safety and availability of doxazosin in treating hypertensive patients with chronic renal failure. Hypertens Res 2001; 24:359-63. [PMID: 11510747 DOI: 10.1291/hypres.24.359] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Hypertension accelerates the progression of renal disease in patients with chronic renal failure. Doxazosin, an alpha1-antagonist, is an antihypertensive agent with a long half-life. In this study, 15 patients with chronic renal failure were treated only with doxazosin and diuretics for 6 months and their blood pressure, renal parameters and lipid profile were measured. The initial dose of doxazosin was 2 mg/day and it was titrated until blood pressure was normalized. The average dose was 5.6 mg/day. As expected, systolic and diastolic blood pressure were decreased with treatment (165/91 mmHg to 135/73 mmHg). The drop in blood pressure was associated with an increase in glomerular filtration and a decrease in plasma BUN and creatinine levels. Reduction in mean blood pressure and decrease in proteinuria had a significant positive correlation (r=0.048, p=0.007). Proteinuria was decreased from 1.8 mg/day to 1.3 mg/day with doxazosin treatment and triglycerides also decreased, while HDL-cholesterol was increased. No side effects were observed. These results indicate that doxazosin is an efficient depressor agent with renal protective actions and that higher doses of doxazosin can be safely given to patients with chronic renal failure.
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Affiliation(s)
- Y Mori
- Department of Medicine II and Cardiovascular Center, Kansasi Medical University, Moriguchi, Japan
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41
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Maki K, Miller AJ, Okano T, Shibasaki Y. A three-dimensional, quantitative computed tomographic study of changes in distribution of bone mineralization in the developing human mandible. Arch Oral Biol 2001; 46:667-78. [PMID: 11369322 DOI: 10.1016/s0003-9969(01)00006-1] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
The three-dimensional distribution of highly mineralized cortical bone on the buccal surface of the mandible was evaluated using quantitative computed tomography. The study was completed in 34 living persons (21 females and 13 males) between the ages of 9 and 32 yr of age with symmetrical mandibles. The geometrical distribution of the highly mineralized areas (>1250 mg/cm(3)) was determined by three-dimensional reconstruction of images. The pattern of distribution was evaluated by superimposing a 9 by 9-mesh grid over the lateral view of the mandible and adapting it to the same anatomical landmarks for different aged participants. Individuals demonstrated four different patterns of distribution of highly mineralized buccal cortical bone. The youngest had highly mineralized bone in the corpus of the mandible and along the anterior ramal border. In older individuals, the mineralization changed to include the mid- and posterior ramus. Highly mineralized bone was not found within the condylar, coronoid, or gonial angle regions of any participant. A comparison of the mineralization pattern between the left and right lateral mandibular views showed bilateral symmetry with similar patterns of distribution. Comparison of the number of grids occupied by highly mineralized cortical bone with the age of the participant, mandibular length, gonial angle, and cross-sectional area of the masseter muscle produced the highest correlation coefficient with the size of the masseter muscle.
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Affiliation(s)
- K Maki
- Department of Growth and Development, School of Dentistry, University of California at San Francisco, San Francisco, CA 94143-0438, USA
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42
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Maki K, Miller AJ, Okano T, Hatcher D, Yamaguchi T, Kobayashi H, Shibasaki Y. Cortical bone mineral density in asymmetrical mandibles: a three-dimensional quantitative computed tomography study. Eur J Orthod 2001; 23:217-32. [PMID: 11471265 DOI: 10.1093/ejo/23.3.217] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022]
Abstract
The three-dimensional distribution (3D) of the highest mineralized cortical bone was evaluated in 32 subjects between the ages of 8 and 30 years with asymmetrical mandibles using quantitative computed tomography (QCT). The geometrical distribution of the highest mineralized areas (> 1250 mg/cm3) representative of mandibular cortical bone was determined by 3D reconstruction of the images. The length of the mandible on each side was determined by defining a new linear measurement from the centre of the 3D reconstructed condyle to the midline of the symphysis as identified from a submental view. The cross-sectional areas of the masseter and medial pterygoid muscles were assessed from bilateral axial views through the middle of the muscles parallel to the Frankfort-Horizontal plane. Comparison between the lengths of the two mandibular sides (right-left = mm) indicated a range of asymmetries with an equal number of subjects with the left and right mandible longer. Comparison of the area of highest mineralized cortical bone between the right and left sides (R/L) to the ratio of the mandibular length (R/L) showed a high correlation coefficient (r = 0.629) suggesting that the shortest mandibular side had more highly mineralized bone. A comparison of the area of highest mineralized cortical bone between the right and left sides (R/L) to the ratio of cross-sectional areas of the muscles showed the highest correlation coefficient (r = 0.724) with the ipsilateral masseter muscle. These findings indicate that asymmetrical mandibles are associated with asymmetrical distributions of the highest mineralized cortical bone and that this is age dependent.
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Affiliation(s)
- K Maki
- Department of Orthodontics, Showa University, Tokyo, Japan
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43
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Abstract
This study was aimed at quantitatively evaluating the relationship between craniofacial morphology and the Pro561Thr (P56IT) variant in the growth hormone receptor gene (GHR), which is considered to be an important factor in craniofacial and skeletal growth. The subjects were unrelated individuals in a normal Japanese population and consisted of 50 men and 50 women. With the use of genomic DNA extracted from whole blood, the GHR gene P56IT variant was detected by the polymerase chain reaction-restriction fragment length polymorphism method (with the restriction enzyme StuI). The relationships of the genotypes to body height and 5 linear measurements from lateral cephalograms were examined for evaluation of craniofacial morphology. The normal Japanese population without P56IT had a significantly greater mandibular ramus length (condylion-gonion) than did those with P56IT. This suggests that the GHR gene P56IT variant may be associated with mandibular height growth and can be a genetic marker for it. Further studies about such genetic markers may expand our understanding of the genetic control in craniofacial morphological determinants and help in the prediction of craniofacial growth.
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Affiliation(s)
- T Yamaguchi
- Department of Orthodontics, School of Dentistry, Showa University, Tokyo, Japan.
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44
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Ohmae M, Saito S, Morohashi T, Seki K, Qu H, Kanomi R, Yamasaki KI, Okano T, Yamada S, Shibasaki Y. A clinical and histological evaluation of titanium mini-implants as anchors for orthodontic intrusion in the beagle dog. Am J Orthod Dentofacial Orthop 2001; 119:489-97. [PMID: 11343020 DOI: 10.1067/mod.2001.114300] [Citation(s) in RCA: 135] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
The aim of this study was to determine the anchorage potential of the titanium mini-implant for orthodontic intrusion of the mandibular posterior teeth. Six mini-implants were surgically placed around the mandibular third premolars on each side in 3 adult male beagle dogs. On the buccal site, three mini-implants were placed distal to the apex of the distal root of the third premolar, at the interradicular septa of the third premolar, and mesial to the apex of the mesial root of the third premolar, as linearly as possible. The same procedure was performed at the lingual site on both sides of the mandibular third premolars in each dog. Bilateral interradicular mini-implants on both the buccal and the lingual sites were used as the anchorage for the intrusion of the third premolars (loaded implants) and the other mini-implants were used as control (unloaded) implants. In 6 weeks, an intrusive force (150 g) was applied between the interradicular implants on the buccal and the lingual sites by closed coil springs run across the crowns of the third premolars. After 12 to 18 weeks of orthodontic intrusion, the animals were killed and their mandibles were dissected and prepared for histologic and fluorescent observation. The results indicated that the mandibular third premolars intruded 4.5 mm, on average, after 12 to 18 weeks of orthodontic force application, with mild root resorption at the furcation area as well as the root apex. All the mini-implants remained stable during orthodontic tooth movement without any mobility or displacement. The morphometrical findings indicated that the calcification of the peri-implant bone on the loaded implants was equal to or slightly greater than those of the controls. In addition, 6 of the 36 mini-implants were removed after tooth movement, and all of them were easily removed with a screwdriver. These findings suggest that mini-implants are effective tools for the anchorage of orthodontic intrusion in beagle dogs.
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Affiliation(s)
- M Ohmae
- Department of Orthodontics, School of Dentistry, Showa University, Tokyo, Japan
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45
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Matsubara H, Shibasaki Y, Okigaki M, Mori Y, Masaki H, Kosaki A, Tsutsumi Y, Uchiyama Y, Fujiyama S, Nose A, Iba O, Tateishi E, Hasegawa T, Horiuchi M, Nahmias C, Iwasaka T. Effect of angiotensin II type 2 receptor on tyrosine kinase Pyk2 and c-Jun NH2-terminal kinase via SHP-1 tyrosine phosphatase activity: evidence from vascular-targeted transgenic mice of AT2 receptor. Biochem Biophys Res Commun 2001; 282:1085-91. [PMID: 11302725 DOI: 10.1006/bbrc.2001.4695] [Citation(s) in RCA: 35] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Angiotensin II (Ang II) has two major receptor isoforms, AT1 and AT2. AT1 transphosphorylates Ca(2+)-sensitive tyrosine kinase Pyk2 to activate c-Jun NH2-terminal kinase (JNK). Although AT2 inactivates extracellular signal-regulated kinase (ERK) via tyrosine phosphatases (PTP), the action of AT2 on Pyk2 and JNK remains undefined. Using AT2-overexpressing vascular smooth muscle cells (AT2-VSMC) from AT2-transgenic mice, we studied these undefined actions of AT2. AT1-mediated JNK activity was increased 2.2-fold by AT2 inhibition, which was abolished by orthovanadate. AT2 did not affect AT1-mediated Pyk2 phosphorylation, but attenuated c-Jun mRNA accumulation by 32%. The activity of src-homology 2 domain-containing PTP (SHP-1) was significantly upregulated 1 min after AT2 stimulation. Stable overexpression of SHP-1 dominant negative mutant in AT2-VSMC completely abolished AT2-mediated inhibition of JNK activation and c-Jun expression. These findings suggest that AT2 inhibits JNK activity by affecting the downstream signal of Pyk2 in a SHP-1-dependent manner, leading to a decrease in c-Jun expression.
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MESH Headings
- Angiotensin Receptor Antagonists
- Animals
- Calcium/metabolism
- Cells, Cultured
- Enzyme Inhibitors/pharmacology
- Focal Adhesion Kinase 2
- Genes, Dominant
- Intracellular Fluid/metabolism
- Intracellular Signaling Peptides and Proteins
- JNK Mitogen-Activated Protein Kinases
- Mice
- Mice, Transgenic
- Mitogen-Activated Protein Kinases/antagonists & inhibitors
- Mitogen-Activated Protein Kinases/genetics
- Mitogen-Activated Protein Kinases/metabolism
- Muscle, Smooth, Vascular/cytology
- Muscle, Smooth, Vascular/metabolism
- Phosphorylation/drug effects
- Protein Tyrosine Phosphatase, Non-Receptor Type 1
- Protein Tyrosine Phosphatase, Non-Receptor Type 6
- Protein Tyrosine Phosphatases/antagonists & inhibitors
- Protein Tyrosine Phosphatases/genetics
- Protein Tyrosine Phosphatases/metabolism
- Protein-Tyrosine Kinases/metabolism
- RNA, Messenger/metabolism
- Receptor, Angiotensin, Type 1
- Receptor, Angiotensin, Type 2
- Receptors, Angiotensin/genetics
- Receptors, Angiotensin/metabolism
- Signal Transduction/drug effects
- Signal Transduction/genetics
- Vanadates/pharmacology
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Affiliation(s)
- H Matsubara
- Department of Medicine II, Kansai Medical University, Moriguchi, Osaka, 570, Japan.
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46
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Shibasaki Y, Ubukata K. [Beta-lactam and macrolide resistance in Streptococcus pneumoniae]. Nihon Rinsho 2001; 59:681-6. [PMID: 11304989] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/19/2023]
Abstract
The resistance of beta-lactam antibiotics in penicillin-resistant Streptococcus pneumoniae (PRSP) is due to alterations in penicillin-binding proteins(PBPs). Recently, highly beta-lactam-resistant strains(MIC: > or = 4 micrograms/ml for penicillin, > or = 8 micrograms/ml for ampicillin, and > or = 4 micrograms/ml for cefotaxime) have been isolated. High resistance of these strains is caused by further alterations in pbp2x and pbp2b genes adjacent to conserved amino acid motifs, in addition to that detected in common PRSP. The resistant mechanisms of macrolides in S. pneumoniae is recognized as production of a 23s rRNA methylase encoded by ermB and efflux system mediated by mefA gene. We detected these genes by PCR in clinical isolates, and showed the relationship between the presence of each gene and the susceptibilities of 14-, 15-, 16-membered macrolides.
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Affiliation(s)
- Y Shibasaki
- Pharmaceutical Research Center, Meiji Seika Kaisha, Ltd
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47
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Shiotani A, Shibasaki Y, Sasaki T. Localization of receptor activator of NFkappaB ligand, RANKL, in periodontal tissues during experimental movement of rat molars. QJM 2001; 50:365-9. [PMID: 11592682 DOI: 10.1093/jmicro/50.4.365] [Citation(s) in RCA: 49] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 04/17/2023] Open
Abstract
The receptor activator of NFkappaB ligand, RANKL, is one of the key regulatory molecules in osteoclast formation and function. We examined RANKL localization in the periodontal tissues during experimental movement of rat molars. To produce orthodontic force, an elastic band was inserted between the upper first and second molars for 4 days, and the dissected maxillae were subjected to light and electron microscopic immunocytochemical examination for RANKL. Expression of RANKL protein was detected in osteoblasts, osteocytes, fibroblasts, and osteoclasts mostly located in resorption lacunae. In osteoblasts, osteocytes, and fibroblasts, RANKL localization was mainly observed in the cytoplasm, the cisternae of rough endoplasmic reticulum and along plasma membranes. In osteoclasts, RANKL was expressed along the ruffled, border membranes and in the cytoplasm, including the clear zone. These results suggest that during tooth movement, osteoclast differentiation and activation are regulated, at least in part, by RANKL, possibly produced by osteoblasts/stromal cells and osteoclasts themselves in the periodontal tissues.
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48
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Saito S, Sugimoto N, Morohashi T, Ozeki M, Kurabayashi H, Shimizu H, Yamasaki K, Shiba A, Yamada S, Shibasaki Y. Endosseous titanium implants as anchors for mesiodistal tooth movement in the beagle dog. Am J Orthod Dentofacial Orthop 2000; 118:601-7. [PMID: 11113792 DOI: 10.1067/mod.2000.110636] [Citation(s) in RCA: 34] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
The purpose of this study was to determine the anchorage potential of titanium implants (Branemark; 3.75 x 7 mm) with the use of a sectional arch wire technique for orthodontic mesiodistal tooth movement, as assessed by the osseointegration of implants and tooth movement. Two implants were surgically placed in healed mandibular extraction sites of the second and third premolars on each side in 4 adult male beagle dogs. The implants were surgically uncovered 18 weeks later, and second-stage abutments with soldered edgewise tubes were attached. Segmented edgewise rectangular archwires (0.017 x 0. 025 inch) with a T-loop or an L-loop were placed between the implants and the fourth premolars on both sides as the anchorage unit. One segment in each dog served as a loaded side, and the archwire was calibrated to produce 200 g of lateral force on the fourth premolar. The contralateral segment served as an unloaded side and was not subjected to orthodontic force. Sectional wires were activated biweekly 24, 28, 28, and 32 weeks, respectively, depending on the magnitude and the appearance of mesial tipping movement of the fourth premolar. After mandibular impressions were taken to measure the distance between the first molar and the fourth premolar, the animals were euthanized and dissected mandibles were prepared. The specimens were then embedded in polyester resin and cut to take backscattered electron images. On the basis of these images, the percentage of peri-implant bone volume was calculated and defined as an index of osseointegration. The differences between the initial and final fourth premolar to first molar distances varied (7.40, 8.85, 10.50, and 3.30 mm) on the loaded side, whereas the unloaded side showed no movement. Not only was there no statistical difference in the percent of peri-implant bone volume between the loaded and unloaded sides, but there was also no statistical difference between the compression and tension sides in both loaded and unloaded implants, which suggests that the implants maintained rigid osseointegration. In conclusion, the present study demonstrated that endosseous titanium implants can function as anchors for long-term orthodontic mesiodistal movement.
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Affiliation(s)
- S Saito
- Department of Orthodontics. School of Dentistry, Showa University, Tokyo, Japan.
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Shibasaki Y, Kamasawa N, Shibasaki S, Zou W, Murai T, Ueda M, Tanaka A, Osumi M. Cytochemical evaluation of localization and secretion of a heterologous enzyme displayed on yeast cell surface. FEMS Microbiol Lett 2000; 192:243-8. [PMID: 11064202 DOI: 10.1111/j.1574-6968.2000.tb09389.x] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022] Open
Abstract
A starch-utilizing Saccharomyces cerevisiae strain was constructed by cell surface engineering. Distribution of the heterologous glucoamylase-alpha-agglutinin fusion protein on the yeast cell was analyzed by indirect fluorescence microscopy using an anti-glucoamylase antibody. Most of the intense fluorescence was first localized in the small bud, then observed on the entire cell wall of the daughter and mother cells. Fluorescence also accumulated at the neck region. These observations suggest that the display of the heterologous protein on the cell surface is carried with other cell wall components to the areas in which the cell wall is newly synthesized; the distribution is controlled by the cell cycle. Then, the heterologous protein-encoding gene was expressed in a sec1 mutant, in which secretory vesicles accumulate under restrictive temperature, and the produced protein was detected by immunoelectron microscopy. Most of the gold particles that reacted with the fusion protein were not localized in vesicles but in expanding endoplasmic reticulum. This phenomenon may be due to overproduction of the heterologous protein which was designed to be displayed on the cell wall. Artificial production of heterologous protein may have caused a relative shortage of glycosyl phosphatidylinositol anchors.
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Affiliation(s)
- Y Shibasaki
- Division of Material and Biological Sciences, Graduate School of Science, Japan Women's University, Bunkyo-ku, Tokyo, Japan
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Fukuda K, Shibasaki Y, Nakahara H, Liu MH. Spontaneous formation of polypeptides in the interfacial thin films of amphiphilic amino acid esters: acceleration of the polycondensation and control of the structure of resultant polymers. Adv Colloid Interface Sci 2000; 87:113-45. [PMID: 11185796 DOI: 10.1016/s0001-8686(99)00041-x] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
For the purpose of elucidating the effects of molecular arrangements on the reaction rates and the structure of products, polycondensation of long-chain esters of alpha-amino acids in the monolayer on the water surface and the LB multilayers deposited on CaF2 plates were investigated by monitoring changes of the IR spectra. Spontaneous formation of the polypeptides occurs in the mono- and multilayers at room temperature without any catalyst. The rates of polycondensation in the monolayers are markedly influenced by the degree of molecular packing. Maximum polymerizability is obtained in the vicinity of the transition region from expanded to condensed films. The rates of polycondensation in the LB films are much higher than those in the bulk solids and the molten states. The polycondensation seems to be accelerated by regular arrangements of the monomer molecules in the LB films, where the functional groups are concentrated and situated more effectively for the reaction than in the bulk states. However, the polycondensation rates in the LB films are considerably slower when compared with those in the monolayers on the water surface kept at the optimum area or surface pressure, because the molecules in the LB films deposited under high compression are packed more closely than the optimum condition. Thus, suitably close packing of the monomer molecules, retaining a particular orientation together with some conformational freedom in the monolayer, is most favorable for the polycondensation. Two probable mechanisms for the polycondensation in the Y-type multilayers have been proposed. In the assembly of head-to-head double layers of the monomer molecules, the interlayer reaction propagates by sewing up the functional groups facing each other in the adjacent layers, and the polypeptide of a helical structure or random coil can be obtained. In contrast, for the alternating assembly of the amino acid ester and non-polymerizable octadecyl acetate, the polycondensation should proceed only in each single layer (intralayer reaction) and the polypeptide of the extended beta-form can be formed. In the case of dioctadecyl glutamate LB films, as well as the monolayer on water, the resultant polypeptide is the comb-like polymer with unreacted long-alkyl ester groups as side chains and abundant in the beta-form, indicating the dominant intralayer reaction. On the other hand, in the Y-type multilayer of the equimolar mixture of dioctadecyl glutamate (with two ester groups) and octadecyl ester of lysine (with two amino groups), both of the intra- and interlayer reactions occur effectively, resulting in a two-dimensional network structure of the polypeptide. In conclusion, not only the rate of polycondensation but also the higher-order structure of the resultant polypeptides can be controlled by organized arrangements of the monomer molecules in the interfacial thin films.
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Affiliation(s)
- K Fukuda
- Department of Chemistry, Faculty of Science, Saitama University, Urawa, Japan
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