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Establishment of a canine mammary gland tumor cell line and characterization of its miRNA expression
Tomohiro Osaki,Yuji Sunden,Akihiko Sugiyama,Kazuo Azuma,Yusuke Murahata,Takeshi Tsuka,Norihiko Itoh,Tomohiro Imagawa,Yoshiharu Okamoto 대한수의학회 2016 Journal of Veterinary Science Vol.17 No.3
Canine mammary gland tumors (CMGTs), which are the most common neoplasms in sexually intact female dogs, have been suggested as a model for studying human breast cancer because of several similarities, including relative age of onset, risk factors, incidence, histological and molecular features, biological behavior, metastatic pattern, and responses to therapy. In the present study, we established a new cell line, the SNP cell line, from a CMGT. A tumor formed in each NOD.CB17-Prkdcscid/J mouse at the site of subcutaneous SNP cell injection. SNP cells are characterized by proliferation in a tubulopapillary pattern and are vimentin positive. Moreover, we examined miRNA expression in the cultured cells and found that the expression values of miRNA-143 and miRNA-138a showed the greatest increase and decrease, respectively, of all miRNAs observed, indicating that these miRNAs might play a significant role in the malignancy of SNP cells. Overall, the results of this study indicate that SNP cells might serve as a model for future genetic analysis and clinical treatments of human breast tumors.
Plasma free amino acid profiles of canine mammary gland tumors
Kazuo Azuma,Takeshi Tsuka,Tomohiro Imagawa,Saburo Minami,Yoshiharu Okamoto,Tomohiro Osaki 대한수의학회 2012 JOURNAL OF VETERINARY SCIENCE Vol.13 No.4
The purpose of this study was to elucidate the relationship between plasma free amino acid (PFAA) levels and the clinical stages of mammary gland tumors (MGT) in dogs. PFAA levels in canines with malignant mammary tumors were decreased compared to those of healthy animals. The levels of aspartate and ornithine, in the dogs with tumor metastasis were significantly decreased when compared to those of dogs that did not have metastases. Results of this study indicate that PFAA levels could be a risk factor or biomarker for canine MGT metastasis.
Masaki Onoyama,Takeshi Tsuka,Tomohiro Imagawa,Tomohiro Osaki,Saburo Minami,Kazuo Azuma,Kazuhiko Kawashima,Hiroshi Ishi,Takahiro Takayama,Nobuhiko Ogawa,Yoshiharu Okamoto 대한수의학회 2014 JOURNAL OF VETERINARY SCIENCE Vol.15 No.1
Sixteen cases of malignant soft tissue sarcoma (STS; 10canines and six felines) were treated with a novel tripletherapy that combined photodynamic therapy, hyperthermiausing indocyanine green with a broadband light source, andlocal chemotherapy after surgical tumor resection. This tripletherapy was called photodynamic hyperthermal chemotherapy(PHCT). In all cases, the surgical margin was insufficient. Inone feline case, PHCT was performed without surgicalresection. PHCT was performed over an interval of 1 to 2 weeksand was repeated three to 21 times. No severe side effects,including severe skin burns, necrosis, or skin suture rupture,were observed in any of the animals. No disease recurrence wasobserved in seven out of 10 (70.0%) dogs and three out of six(50.0%) cats over the follow-up periods ranging from 238 to1901 days. These results suggest that PHCT decreases the riskof STS recurrence. PHCT should therefore be considered anadjuvant therapy for treating companion animals with STS inveterinary medicine.
Gastric Adenocarcinoma with Thymic Metastasis after Curative Resection: A Case Report
Tomoyuki Matsunaga,Hiroaki Saito,Kozo Miyatani,Seigo Takaya,Yoji Fukumoto,Tomohiro Osaki,Masahide Ikeguchi 대한위암학회 2014 Journal of gastric cancer Vol.14 No.3
The peritoneum is the most frequent site of recurrence for gastric cancer after gastrectomy, followed by the liver and lymph nodes. Incontrast, metastasis to the thymus is rare. Annual surveillance with computed tomography was performed on a 67-year-old man whopreviously underwent a distal gastrectomy and D2 lymph node dissection for gastric cancer at Tottori University. Five years after theinitial operation, an anterior mediastinal tumor was detected by computed tomography. The patient underwent video-assisted thoracicsurgery to remove the tumor. Histopathology revealed adenocarcinoma cells similar to those of the gastric cancer resected 5 years previously. Thymic metastasis was considered likely based on the location of the tumor. The recognition that gastric cancer can metastasizeto unusual anatomic locations, such as the thymus, can facilitate an accurate, prompt diagnosis and appropriate treatment.
Masahide Ikeguchi,Keisuke Goto,June Watanabe,Shoichi Urushibara,Tomohiro Osaki,Kanenori Endo,Shigeru Tatebe,Seiichi Nakamura 한국간담췌외과학회 2019 Annals of hepato-biliary-pancreatic surgery Vol.23 No.4
Backgrounds/Aims: The prognostic nutritional index (PNI) is based on the albumin concentration and absolute lymphocyte count and is designed to assess the nutritional and immunological status of patients. In this study, we evaluated the prognostic importance of the preoperative and postoperative PNI in patients who underwent curative resection of pancreatic ductal adenocarcinoma (PDAC). Methods: From 2006 to 2017, 50 patients with PDAC underwent curative resection at our hospital. We performed distal pancreatectomy (DP) with splenectomy in 15 patients, pancreaticoduodenectomy (PD) in 27 patients, PD combined with portal vein partial resection in 6 patients, and total pancreatectomy with splenectomy in 2 patients. We compared the preoperative PNI and postoperative PNI (1 and 2 months postoperatively) and analyzed the prognostic importance for these patients. Results: The mean PNI significantly decreased from 45.5 preoperatively to 39.8 at 1 month postoperatively (p<0.001), but recovered to 42.7 at 2 months postoperatively. In 23 patients, the PNI at 2 months postoperatively recovered to the preoperative level (recovered group), but in the remaining 27 patients, the PNI at 2 months postoperatively did not reach the preoperative level (non-recovered group). The overall median survival time in the recovered group (29 months) was significantly longer than that in the non-recovered group (12 months, p=0.003). The multivariate overall analysis demonstrated that good recovery of the postoperative PNI was strongly correlated with a better prognosis. Conclusions: Effective postoperative nutrition may have a prognostic benefit for patients with operable PDAC.
Gastric Adenocarcinoma with Thymic Metastasis after Curative Resection: A Case Report
Matsunaga, Tomoyuki,Saito, Hiroaki,Miyatani, Kozo,Takaya, Seigo,Fukumoto, Yoji,Osaki, Tomohiro,Ikeguchi, Masahide The Korean Gastric Cancer Association 2014 Journal of gastric cancer Vol.14 No.3
The peritoneum is the most frequent site of recurrence for gastric cancer after gastrectomy, followed by the liver and lymph nodes. In contrast, metastasis to the thymus is rare. Annual surveillance with computed tomography was performed on a 67-year-old man who previously underwent a distal gastrectomy and D2 lymph node dissection for gastric cancer at Tottori University. Five years after the initial operation, an anterior mediastinal tumor was detected by computed tomography. The patient underwent video-assisted thoracic surgery to remove the tumor. Histopathology revealed adenocarcinoma cells similar to those of the gastric cancer resected 5 years previously. Thymic metastasis was considered likely based on the location of the tumor. The recognition that gastric cancer can metastasize to unusual anatomic locations, such as the thymus, can facilitate an accurate, prompt diagnosis and appropriate treatment.
Unilateral rostral mandibulectomy for gingival vascular hamartoma in two calves
Takeshi Tsuka,Yoshiharu Okamoto,Naoki Yamamoto,Keiji Hayashi,Takehito Morita,Yuji Sunden,Yusuke Murahata,Kazuo Azuma,Tomohiro Osaki,Norihiko Ito,Tomohiro Imagawa 대한수의학회 2018 Journal of Veterinary Science Vol.19 No.4
A 2-month-old female Holstein calf and a 5-month-old female Japanese black calf presented with gingival vascular hamartoma located in the interdental space between the second and third mandibular incisors in the right and left mandibles, respectively. On radiographic or computed tomographic images, osteolytic changes appeared within the mandibular bones adjacent to the masses. The masses were removed along with affected mandibular bone by using unilateral rostral mandibulectomy. After surgery, both cases exhibited a normal appetite and grew normally, with no cosmetic changes or recurrences. Unilateral rostral mandibulectomy can be applied for invasive gingival vascular hamartomas associated with osteolytic changes.