Application of Polymerase Chain Reaction to Analysis of Antigen Receptor Rearrangements to Support Endoscopic Diagnosis of Canine Alimentary Lymphoma

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概要

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• We evaluated the usefulness of polymerase chain reaction for antigen receptor gene rearrangement analysis (PARR) of endoscopic biopsy specimens for diagnosis of canine alimentary lymphoma. Two endoscopic biopsy specimens were obtained from each lesion in 78 dogs with gastrointestinal symptoms. One specimen was histopathologically examined by a pathologist, and the other was analyzed by PARR. All samples were categorized into three groups [lymphoma (n=4), adenocarcinoma (n=5) and enteritis groups (n=69)] based on the histopathological diagnosis. In the lymphoma group, one case was IgH major-positive, and three cases were TCRγ-positive, representing clonal expansion of B- and T-cells, respectively. PARR produced negative results for all cases in the adenocarcinoma group. In the enteritis group, six cases were TCRγ-positive. Two of the six TCRγ-positive enteritis cases were cytologically diagnosed as lymphoma by fine needle aspiration during a laparotomy. In the enteritis group, the survival times were compared between the TCRγ-positive and TCRγ-negative cases. The overall survival time of the TCRγ-positive enteritis cases was significantly shorter than that of the TCRγ-negative enteritis cases according to a log-rank test (p<0.0001). With regard to other factors, such as age, clinical signs and the serum albumin concentration, there were no significant differences between the TCRγ-positive and TCRγ-negative enteritis cases. In conclusion, PARR is capable of detecting alimentary lymphoma and latent alimentary lymphoma, which cannot be histopathologically diagnosed using endoscopic biopsy specimens. Furthermore, a TCRγ-positive result in PARR may imply a poor prognosis.

著者

• SHIMOKAWA MIYAMA

  Laboratory of Veterinary Internal Medicine, Department of Veterinary Medicine, Faculty of Agricultur

• HIRAOKA Hiroko

  Laboratory of Veterinary Internal Medicine, Department of Veterinary Medicine, Faculty of Agricultur

• OKUDA Masaru

  Laboratory of Veterinary Internal Medicine, Department of Veterinary Medicine, Faculty of Agricultur

• MIZUNO Takuya

  Laboratory of Veterinary Internal Medicine, Department of Veterinary Medicine, Faculty of Agricultur

• WATARI Toshihiro

  Laboratory Comprehensive Veterinary Clinical Studies, Nihon University School of Veterinary Medicine

• Kaneko Naoki

  Laboratory of Veterinary Internal Medicine, Faculty of Agriculture, Yamaguchi University

• Yamamoto Yoshifumi

  Laboratory of Veterinary Internal Medicine, Faculty of Agriculture, Yamaguchi University

• Wada Yuko

  Laboratory of Veterinary Internal Medicine, Faculty of Agriculture, Yamaguchi University

• ITAMOTO Kazuhito

  Laboratory of Veterinary Surgery, Faculty of Agriculture, Yamaguchi University

• NAKAICHI Munekazu

  Laboratory of Veterinary Radiology, Faculty of Agriculture, Yamaguchi University

• TAKAHASHI Tomoko

  Laboratory of Veterinary Radiology, Department of Veterinary Medicine, College of Bioresource Scienc

• Watari Toshihiro

  Laboratory Comprehensive Veterinary Clinical Studies Nihon University School Of Veterinary Medicine

• Yamaya Y

  Nihon Univ. Kanagawa Jpn

• Mizuno Takuya

  Laboratories Of Veterinary Internal Medicine Dep. Of Veterinary Medicine Fac. Of Agriculture Yamaguchi Univ. ...

• OKUDA Masaru

  Laboratories of Veterinary Internal Medicine, Department of Veterinary Medicine, Faculty of Agriculture, Yamaguchi University, 1677-1 Yoshida, Yamaguchi 753-8515, Japan

• HIRAOKA Hiroko

  Laboratories of Veterinary Clinical Pathology, Department of Veterinary Medicine, Faculty of Agriculture, Yamaguchi University, 1677-1 Yoshida, Yamaguchi 753-8515, Japan

• ITAMOTO Kazuhito

  Laboratories of Veterinary Clinical Diagnostics, Department of Veterinary Medicine, Faculty of Agriculture, Yamaguchi University, 1677-1 Yoshida, Yamaguchi 753-8515, Japan

• WADA Yuko

  Laboratories of Veterinary Internal Medicine, Department of Veterinary Medicine, Faculty of Agriculture, Yamaguchi University, 1677-1 Yoshida, Yamaguchi 753-8515, Japan

• OKUDA Masaru

  Laboratory of Veterinary Internal Medicine, Faculty of Agriculture, Yamaguchi University

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