2 0 0 0 日本馬醫ノ盛衰
- 著者
- 池田 音次郎
- 出版者
- JAPANESE SOCIETY OF VETERINARY SCIENCE
- 雑誌
- 中央獸醫會雑誌 (ISSN:18839096)
- 巻号頁・発行日
- vol.3, pp.85-91, 1890
- 著者
- 矢用 健一 武田 眞記夫 局 博一 菅野 茂 土井 邦雄
- 出版者
- JAPANESE SOCIETY OF VETERINARY SCIENCE
- 雑誌
- Journal of Veterinary Medical Science (ISSN:09167250)
- 巻号頁・発行日
- vol.55, no.2, pp.341-342, 1993
- 被引用文献数
- 10
DBA/2およびBALB/cマウスを用いて, 脳心筋炎ウイルスD変異株(EMC-D)が, 水迷路における運動能, 方向認知記憶能および作業記憶能に及ぼす影響を検討した. 全個体において, 作業達成までの潜時は漸次短縮されたが, テスト初日と比べて有意な短縮がみられたのは, 両系統とも対照群に比べて感染群の方が遅かった. 従って, EMC-D感染マウスにおける水迷路学習の阻害には, 脊髄病巣起因の後肢麻痺による運動能の低下の他に, 海馬病巣起因の方向認知記憶及び作業記憶の障害が関与していることが示唆された.
- 著者
- Akihiko SUGIYAMA Sayaka HATA Kengo SUZUKI Eriko YOSHIDA Ryohei NAKANO Sharbanee MITRA Ryo ARASHIDA Yuta ASAYAMA Yukinori YABUTA Takashi TAKEUCHI
- 出版者
- JAPANESE SOCIETY OF VETERINARY SCIENCE
- 雑誌
- Journal of Veterinary Medical Science (ISSN:09167250)
- 巻号頁・発行日
- vol.72, no.6, pp.755-763, 2010 (Released:2010-07-04)
- 参考文献数
- 49
- 被引用文献数
- 54 88
Paramylon is a β-1,3-D-glucan isolated from Euglena gracilis Z. This study was designed to evaluate the suppressive effects of the oral administration of paramylon on the development of atopic dermatitis (AD)-like skin lesions induced by repeated application of 2,4,6-trinitrochlorobenzene (TNCB) in sensitized NC/Nga mice. The effects of paramylon were assessed by measuring macroscopical and histopathological findings of skin, ear swelling, serum levels of total IgE, interleukin-4 (IL-4) and interferon-γ (IFN-γ) and IL-18 and IL-12 contents in the skin lesions. Oral administration of paramylon inhibited the development of AD-like skin lesions as exemplified by a significant decrease in dermatitis scores for the back, ear swelling and hypertrophy of the skin, infiltration of inflammatory cells in the skin, and serum IgE levels. Oral administration of paramylon reduced serum levels of both IL-4 and IFN-γ and IL-18 and IL-12 contents in the skin lesions. Oral administration of paramylon did not cause weight loss, as was observed with prednisolone. These results suggest that paramylon inhibits the development of AD-like skin lesions in NC/Nga mice by suppressing both the T-helper (Th) 1 and Th 2 cell responses. Our results indicate that paramylon treatment could provide an effective alternative therapy for the management of AD.
- 著者
- Satoshi NOZAWA Hitomi ODA Ran AKIYAMA Kaori UEDA Kaori SAEKI Saori SHONO Natsuki MARUYAMA Atsuki MURATA Hiroyuki TAZAKI Akihiro MORI Yutaka MOMOTA Daigo AZAKAMI Toshinori SAKO Katsumi ISHIOKA
- 出版者
- JAPANESE SOCIETY OF VETERINARY SCIENCE
- 雑誌
- Journal of Veterinary Medical Science (ISSN:09167250)
- 巻号頁・発行日
- pp.14-0033, (Released:2014-05-15)
- 被引用文献数
- 2 5
Hyperadrenocorticism (HAC) is a common endocrine disorder in dogs, in which excess glucocorticoid causes insulin resistance. Disturbance of insulin action may be caused by multiple factors, including transcriptional modulation of insulin signal molecules which lie downstream of insulin binding to insulin receptors. In this study, gene expressions of insulin signal molecules were examined using neutrophils of the HAC dogs (the untreated dogs and the dogs which had been treated with trilostane). Insulin receptor substrate (IRS)-1, IRS-2, phosphatidylinositol 3-kinase (PI3-K), protein kinase B/Akt kinase (Akt)-2 and protein kinase C (PKC)-lambda were analyzed in the HAC dogs and compared with those from normal dogs. The IRS-1 gene expressions decreased by 37% and 35% of the control dogs in the untreated and treated groups, respectively. The IRS-2 gene expressions decreased by 61% and 72%, the PI3-K gene expressions decreased by 47% and 55% and the Akt-2 gene expressions decreased by 45% and 56% of the control dogs, similarly. Collectively, gene expressions of insulin signal molecules are suppressed in the HAC dogs, which may partially contribute to the induction of insulin resistance.
- 著者
- Shingo MAEDA Koichi OHNO Kazuyuki UCHIDA Hirotaka IGARASHI Yuko GOTO-KOSHINO Yasuhito FUJINO Hajime TSUJIMOTO
- 出版者
- JAPANESE SOCIETY OF VETERINARY SCIENCE
- 雑誌
- Journal of Veterinary Medical Science (ISSN:09167250)
- 巻号頁・発行日
- pp.14-0060, (Released:2014-05-15)
- 被引用文献数
- 7 19
Serine proteases elicit cellular responses via protease-activated receptor-2 (PAR-2) which is known to regulate inflammation and the immune response. Although the gastrointestinal tract is exposed to large amounts of proteolytic enzymes, the role of PAR-2 in canine inflammatory bowel disease (IBD) remains unclear. The objective of this study was to investigate the effects of PAR-2 activation on inflammatory cytokine/chemokine gene expression in canine intestine and the expression of intestinal PAR-2 and fecal serine protease activity in dogs with IBD. Duodenal biopsies from healthy dogs were cultured and treated ex vivo with trypsin or PAR-2 agonist peptide, and inflammatory cytokine/chemokine gene expression in the tissues was then quantified by real-time PCR. PAR-2 mRNA and protein expression levels in the duodenal mucosa were examined by real-time PCR and immunohistochemistry, respectively. Fecal serine protease activity was determined by azocasein assay. In ex vivo-cultured duodenum, trypsin and PAR-2 agonist peptide induced significant up-regulation of mRNA expression levels of interleukin-1 β (IL-1β), IL-8, mucosae-associated epithelial chemokine (MEC) and fractalkine, and this up-regulation was inhibited by a serine protease inhibitor. Duodenal PAR-2 mRNA and protein expression levels were higher in dogs with IBD than in healthy control dogs. Fecal serine protease activity was significantly elevated in dogs with IBD, and the level of activity correlated positively with the clinical severity score. These results suggest that PAR-2 may contribute to the pathogenesis of canine IBD by inducing expression of inflammatory mediators in response to luminal serine proteases.
- 著者
- Hiroki KAWABATA Ai TAKANO Teruki KADOSAKA Hiromi FUJITA Yoshiki NITTA Mutsuyo GOKUDEN Toshiro HONDA Junko TOMIDA Yoshiaki KAWAMURA Toshiyuki MASUZAWA Fubito ISHIGURO Nobuhiro TAKADA Yasuhiro YANO Masako ANDOH Shuji ANDO Kozue SATO Hideyuki TAKAHASHI Makoto OHNISHI
- 出版者
- JAPANESE SOCIETY OF VETERINARY SCIENCE
- 雑誌
- Journal of Veterinary Medical Science (ISSN:09167250)
- 巻号頁・発行日
- pp.13-0162, (Released:2013-05-13)
- 被引用文献数
- 4 7
Lyme disease Borrelia spp. are transmitted by Ixodes ticks, and more than 10 species of borreliae have been identified around the world. Recently another Borrelia sp. has been reported in Asia (Japan, Korea, China, Taiwan and Thailand) as Borrelia valaisiana-related sp. In the present study, we obtained and genetically characterized 19 B. valaisiana-related sp. strains from mammals and ticks. Genetic analyses showed that the Borrelia strains were distinct from B. valaisiana found in Europe. Multilocus sequencing typing revealed that these Borrelia isolates formed a monophyletic group with B. yangtze strains in China. Some of strains were isolated from the bladders of small mammals, and also two strains were experimentally confirmed to be infectious to C3H/HeN mice. We observed that the Borrelia sp. was maintained in Ixodes granulatus tick after molting. These results suggested that small mammals and I. granulatus were possible reservoir hosts and vector tick for the Borrelia sp., respectively. B. valaisiana, originally found in Europe, was transmitted mainly by I. ricinus, and birds were mainly thought to be reservoir hosts. Our results suggested Japanese isolates of B. yangtze (formerly B. valaisiana-related sp.) were distinguishable from B. valaisiana according to the reservoir host and its vector tick. In this study, we also deposited borrelia strain Okinawa-CW62 to bioresource centers as a reference strain of the B. yangtze (=DSM 24625, JCM 17189).
- 著者
- Masanori KOBAYASHI Tatsuya HORI Eiichi KAWAKAMI
- 出版者
- JAPANESE SOCIETY OF VETERINARY SCIENCE
- 雑誌
- Journal of Veterinary Medical Science (ISSN:09167250)
- 巻号頁・発行日
- pp.13-0053, (Released:2013-04-30)
- 被引用文献数
- 4 7
In healthy male dogs, peripheral plasma testosterone (T), prostaglandin E2 (PGE2), and seminal plasma PGE2 levels were measured before, during, and after ejaculation and semen quality was examined after oral administration of PGE2. Plasma T and PGE2 levels did not change during these periods, but seminal plasma PGE2 level in the first and second fraction was significantly higher than that at 0–5 and 5–10 min after the start of ejaculation of the third fraction. Semen volume but not quality increased after PGE2 administration. In conclusion, large amounts of PGE2 are released from the prostate gland during the early part of ejaculation and that PGE2 plays an essential role in secretion of seminal plasma.
2 0 0 0 OA In Vitro Activities of Antifungal Agents against Clinical Isolates of Dermatophytes from Animals
- 著者
- Sayuri ITOI Rui KANO Atsuhiko HASEGAWA Hiroshi KAMATA
- 出版者
- JAPANESE SOCIETY OF VETERINARY SCIENCE
- 雑誌
- Journal of Veterinary Medical Science (ISSN:09167250)
- 巻号頁・発行日
- pp.1203280801, (Released:2012-04-02)
- 被引用文献数
- 3 25
Although the susceptibility of dermatophytes to antifungal drugs is well documented in humans, the effectiveness in animals has not been previously investigated. The in vitro susceptibility of 54 clinical isolates from animal dermatophytoses to ketoconazole (KTZ), itaconazole (ITZ) and terbinafine (TFN) was measured using microdilution assay (CLSI M38-A2 test) and by the E-test (KTZ and ITZ). All 3 drugs showed antifungal activity, while KTZ displayed the broadest minimum inhibition concentration (MIC) range (0.125–16 μg/ml) against M. canis and M. gypseum. The MIC of KTZ and ITZ was almost the same for human and animal isolates of T. mentagrophytes and T. rubrum. The MIC of TFN was almost the same for dermatophytes isolated from humans and animals.
- 著者
- Hidetaka NISHIDA Hiroshi TANAKA Masahiko KITAMURA Shingo HATOYA2 Kikuya SUGIURA2 Toshio INABA2 Masanari NAKAYAMA
- 出版者
- JAPANESE SOCIETY OF VETERINARY SCIENCE
- 雑誌
- Journal of Veterinary Medical Science (ISSN:09167250)
- 巻号頁・発行日
- pp.1203280802, (Released:2012-04-02)
- 被引用文献数
- 3 9
Progressive ataxia and paralysis in three Miniature Dachshunds were found to be caused by idiopathic sterile pyogranulomatous inflammation of epidural fat between T5 and L4. All dogs were managed by hemilaminectomy and removal of epidural compressive material. Surgical findings and histopathological evaluation were necessary to diagnose epidural pyogranulomatous inflammation. A dog did not regain motor and sensor function after the surgery. Two dogs had exhibited improved neurological function after the surgery, but they recurred. Oral cyclosporine treatment was useful for their long remission. Idiopathic sterile pyogranulomatous inflammation of epidural fat can be considered to be a cause of thoracolumbar myelopathy in dogs.
- 著者
- Yoshinori TAKEUCHI Masashi TAKAHASHI Masaya TSUBOI Yasuhito FUJINO Kazuyuki UCHIDA Koichi OHNO Hiroyuki NAKAYAMA Hajime TSUJIMOTO
- 出版者
- JAPANESE SOCIETY OF VETERINARY SCIENCE
- 雑誌
- Journal of Veterinary Medical Science (ISSN:09167250)
- 巻号頁・発行日
- pp.1203220798, (Released:2012-03-28)
- 被引用文献数
- 6 20
A Japanese domestic long-hair cat of about 8 years of age was presented with vomiting and hematochezia and was found to have significant hypereosinophilia. Bone marrow aspiration revealed moderate increases of eosinophilic lineages. Histopathological examination revealed mild eosinophilic and epitheliotropic T-lymphocytic infiltrations in the duodenum. Although the cat remained asymptomatic with only prednisolone administration, the cat presented with hematemesis, weight loss, and severe anorexia 512 days after the initial presentation. Subsequently, gastrointestinal perforation developed, and the cat died on Day 536. Histopathological examination of autopsy specimens revealed mixed cellular infiltration including eosinophils and neoplastic lymphocytes in the intestinal lymph nodes, intestine, liver, spleen, and pancreas. Immunohistochemical examination supports a diagnosis of intestinal T-cell lymphoma with severe hypereosinophilic syndrome.
2 0 0 0 OA Extraskeletal Myxoid Chondrosarcoma with Systemic Metastasis in a Five-Month-Old Irish Setter Dog
- 著者
- Daisuke KOJIMA Hitoshi HATAI Toshifumi OYAMADA Chun-Ho PARK
- 出版者
- JAPANESE SOCIETY OF VETERINARY SCIENCE
- 雑誌
- Journal of Veterinary Medical Science (ISSN:09167250)
- 巻号頁・発行日
- pp.1203160794, (Released:2012-03-22)
- 被引用文献数
- 6 9
Extraskeletal myxoid chondrosarcoma was found in a five-month-old male Irish setter dog. At necropsy, the largest mass, measuring 15 × 13 × 13 cm, was found in the right caudal lobe of the lung, and metastatic small masses were observed in multiple organs. Microscopically, the tumor comprised mainly atypical mesenchymal cells and myxoid stroma, which stained positively with Alcian blue. Immunohistochemically, the tumor cells stained positively for vimentin, S-100 protein, neuron-specific enolase, calretinin, and chromogranin A. Ultrastructurally, the cytoplasm of the tumor cells was comprised abundant rough endoplasmic reticulum, mitochondria, Golgi complex, free ribosomes and short irregular microvillous processes extending from the cytoplasm. Based on these pathological findings, this tumor was diagnosed as extraskeletal myxoid chondrosarcoma.
- 著者
- Kyohei ISHIGAKI Masahiko NOYA Yumiko KAGAWA Kazunori IKE Hiromitsu ORIMA Soichi IMAI
- 出版者
- JAPANESE SOCIETY OF VETERINARY SCIENCE
- 雑誌
- Journal of Veterinary Medical Science (ISSN:09167250)
- 巻号頁・発行日
- pp.1203180796, (Released:2012-03-26)
- 被引用文献数
- 5 8
A one-month male Greyhound dog presented with a swinging gait of the hindlimbs, and later developed muscular atrophy of the femoral region and hyperextension of hindlimbs. The dog had positive serum IFAT titers to Neospora caninum, but a negative titer in the cerebrospinal fluid (CSF). N. caninum-specific DNA was amplified from the CSF using a semi-nested polymerase chain reaction assay. Clusters of protozoa in biopsied muscle fibers were subsequently confirmed as N. caninum tachyzoites by immunohistochemical examination. Early recognition and treatment are necessary for effective recovery of clinical canine neosporosis, but antemortem diagnosis is difficult. We suggest that the detection of parasite deoxyribonucleic acid in the CSF is a useful antemortem diagnostic method in facilitating treatment of this disease.
- 著者
- Tsuyoshi KIMURA Machiko SEKIDO Naoki CHIMURA Sanae SHIBATA Naho KONDO Harumi KAMISHINA Hiroaki KAMISHINA Sadatoshi MAEDA
- 出版者
- JAPANESE SOCIETY OF VETERINARY SCIENCE
- 雑誌
- Journal of Veterinary Medical Science (ISSN:09167250)
- 巻号頁・発行日
- pp.1203070790, (Released:2012-03-16)
- 被引用文献数
- 6 12
House dust mite (HDM) allergens are the most common allergens for induction of IgE-mediated hypersensitivity. Recently, epicutaneous sensitization with HDM allergens has been emphasized in the development of atopic dermatitis (AD) by producing various soluble factors in keratinocytes. Among the soluble factors, GM-CSF is a key molecule that activates Langerhans cells, antigen-presenting cells in the epidermis. In the present study, we investigated the effects of Dermatophagoides farinae 1 (Der f 1) on GM-CSF production in a canine keratinocyte cell line, CPEK. CPEKs were found to produce GM-CSF upon stimulation by Der f 1. The GM-CSF production was suppressed by addition of a cysteine protease inhibitor. The present results suggest that cysteine protease-derived Der f may be an initiator of allergic inflammation by inducing the production of GM-CSF in keratinocytes.
2 0 0 0 OA MRI Examination of Trachea and Bronchi in the Ganges River Dolphin (Platanista gangetica)
- 著者
- Hideki ENDO Daishiro YAMAGIWA Kazuyoshi ARISHIMA Masako YAMAMOTO Motoki SASAKI Yoshihiro HAYASHI Toshio KAMIYA
- 出版者
- JAPANESE SOCIETY OF VETERINARY SCIENCE
- 雑誌
- Journal of Veterinary Medical Science (ISSN:09167250)
- 巻号頁・発行日
- vol.61, no.10, pp.1137-1141, 1999-10-25 (Released:2000-04-12)
- 参考文献数
- 16
- 被引用文献数
- 5 7
The MRI examination was carried out in a formalin-fixed specimen of the Ganges River dolphin (Platanista gangetica), one of the evolutionary primitive species of cetaceans. We could morphologically elucidate the tracheobronchial ramification in the intact whole body. We demonstrated from the MRI sections that the characteristic tracheal bronchus branches from the trachea at the cranial portion. These findings suggest the phylogenetic relationships between cetaceans and artiodactyls. The left bronchus is obviously larger in diameter than the right one. We suggest that the right bronchus has smaller capacity of gas exchange than the left one, because the dolphin possesses the tracheal bronchus in the right lung. The MRI method will be important in the non-invasive study of the anatomy in endangered animal carcass as Ganges River dolphin.
- 著者
- Aki OHMI Koichi OHNO Kazuyuki UCHIDA Hiroyuki NAKAYAMA Yuko KOSHINO-GOTO Kenjiro FUKUSHIMA Masashi TAKAHASHI Ko NAKASHIMA Yasuhito FUJINO Hajime TSUJIMOTO
- 出版者
- JAPANESE SOCIETY OF VETERINARY SCIENCE
- 雑誌
- Journal of Veterinary Medical Science (ISSN:09167250)
- 巻号頁・発行日
- vol.73, no.1, pp.1-5, 2011 (Released:2011-01-29)
- 参考文献数
- 19
- 被引用文献数
- 7 12
We retrospectively studied the clinical and laboratory features and outcomes of chronic enteropathy in Shiba dogs. Among 99 dogs with chronic enteropathy, 21 Shiba dogs (21%) were included in the study (odds ratio, 7.14). No significant differences were seen in signalment, clinical signs, symptoms or laboratory profiles between the Shiba and non-Shiba groups. Severe histopathological lesions in the duodenum were a common finding in the Shiba group. The median overall duration of survival in the Shiba group was 74 days, while that of the dogs in the non-Shiba group could not be determined because more than half of the cases remained alive at the end of this study. The difference between the groups was statistically significant (P<0.0001). The 6-month and 1-year survival rates for the Shiba group were 46% and 31%, respectively. Conversely, the 6-month, 1-year and 3-year survival rates for the non-Shiba group were 83%, 74% and 67%. The results obtained here demonstrated that the Shiba dog is predisposed to chronic enteropathy and shows severe duodenum lesions and poor outcomes, indicating a breed-specific disease.
1 0 0 0 OA Analysis of occurrence and risk factors associated with pet rabbits’ tumors in Central Thailand
- 著者
- Suchawan PORNSUKAROM Pansawut SUDJAIDEE Nattaya RATIPUNYAPORNKUM Thaveesuph TUNGJITPEANPONG Apaporn CHETTANAWANIT Chana AMORNTEPARAK Thanida SANANMUANG
- 出版者
- JAPANESE SOCIETY OF VETERINARY SCIENCE
- 雑誌
- Journal of Veterinary Medical Science (ISSN:09167250)
- 巻号頁・発行日
- vol.85, no.12, pp.1341-1347, 2023 (Released:2023-12-27)
- 参考文献数
- 36
Rabbit oncology is gaining more attention as more pet rabbits are surviving beyond their normal lifespans. Due to the limited epidemiological information on pet rabbits’ tumors in Thailand, this study aimed to report the prevalence and the potential risk factors associated with tumors in pet rabbits in Thailand. From 2018 to 2022, 93 tissue biopsies from tumor-suspected lesions on pet rabbits were gathered from animal hospitals in Bangkok and Chonburi provinces, Thailand. According to histopathology confirmation, tumors and tumor-like lesions were diagnosed. In this study, the overall tumors were 67.74% (n=63) out of the submitted cases (n=93). The most commonly affected organ systems were reproduction (65.08%) and integumentary (22.22%). Rabbits older than 5 years were 3.85 times more likely to have reproductive tumors than younger rabbits (95% confidence interval (CI): 1.45–10.27, P≤0.01), and the most frequently occurring tumor type was uterine adenocarcinoma. Furthermore, male rabbits had a 17.02 times higher probability of developing cutaneous tumors than female rabbits (95% CI: 4.19–69.11, P≤0.001), and the most frequently occurring tumor type was soft tissue sarcoma. The results of this study thus suggested that the age and sex of the rabbits were potential risk factors for tumor development in Thailand. The knowledge gained from our study also provided the recommendation for owners to monitor their rabbits’ health annually, particularly after late middle age, and rendered guidance for tumor detection in practical clinics.
- 著者
- Ayumi SUMI James K CHAMBERS Soma ITO Kazuhiro KOJIMA Tetsuo OMACHI Masaki DOI Kazuyuki UCHIDA
- 出版者
- JAPANESE SOCIETY OF VETERINARY SCIENCE
- 雑誌
- Journal of Veterinary Medical Science (ISSN:09167250)
- 巻号頁・発行日
- vol.86, no.1, pp.39-48, 2024 (Released:2024-01-10)
- 参考文献数
- 58
Merkel cell carcinoma (MCC) is a cutaneous neuroendocrine tumor, and more than 90% of feline MCC cases test positive for Felis catus papillomavirus type 2 (FcaPV2). In the present study, basal cell markers p40, p63, and p73 and the stem cell marker SOX2 and cytokeratin 14 (CK14) were immunohistochemically examined in normal fetal, infant, and adult feline skin tissues. The expression of these proteins was examined in tumors positive for FcaPV2, including MCC, basal cell carcinoma (BCC), Bowenoid in situ carcinoma (BISC), and squamous cell carcinoma (SCC). Infant and adult feline skin tissues had mature Merkel cells, which were CK14-, CK18+, CK20+, SOX2+, synaptophysin+ and CD56+, while fetal skin tissue had no mature Merkel cells. MCC was immunopositive for p73, CK18, and SOX2 in 32/32 cases, and immunonegative for CK14 in 31/32 cases and for p40 and p63 in 32/32 cases. These results indicate that MCC exhibits different immunophenotypes from Merkel cells (p73-) and basal cells (p40+, p63+, and SOX2-). In contrast, all 3 BCCs, 1 BISC, and 2 SCCs were immunopositive for the basal cell markers p40, p63, and p73. The life cycle of papillomavirus is closely associated with the differentiation of infected basal cells, which requires the transcription factor p63. Changes in p63 expression in FcaPV2-positive MCC may be associated with unique cytokeratin expression patterns (CK14-, CK18+, and CK20+). Furthermore, SOX2 appears to be involved in Merkel cell differentiation in cats, similar to humans and mice.
- 著者
- Hiroto TOYODA Akiyoshi TANI Yuko GOTO-KOSHINO Tomoki MOTEGI Mika SAKAMOTO Takako MOCHIZUKI Kei HARADA Tetsuya KOBAYASHI Asuka SETOGUCHI Yohei SHIZUTA Takuya MIZUNO Mitsuhiro IRIE Jun NAKAMICHI Hajime TSUJIMOTO Aki OHMI Ray FUKUOKA Yasukazu NAKAMURA Hirotaka TOMIYASU
- 出版者
- JAPANESE SOCIETY OF VETERINARY SCIENCE
- 雑誌
- Journal of Veterinary Medical Science (ISSN:09167250)
- 巻号頁・発行日
- vol.86, no.1, pp.18-27, 2024 (Released:2024-01-10)
- 参考文献数
- 49
- 被引用文献数
- 1
Although chemotherapy using CHOP-based protocol induces remission in most cases of canine multicentric high-grade B-cell lymphoma (mhBCL), some cases develop early relapse during the first induction protocol. In this study, we examined the gene expression profiles of canine mhBCL before chemotherapy and investigated their associations with early relapse during the first whole CHOP-based protocol. Twenty-five cases of mhBCL treated with CHOP-based protocol as first induction chemotherapy were included in this study. Sixteen cases completed the first whole CHOP-based protocol without relapse (S-group), and nine developed relapse during the chemotherapy (R-group). RNA-seq was performed on samples from neoplastic lymph nodes. Differentially expressed genes (DEGs) were extracted by the comparison of gene expression profiles between S- and R-groups, and the differences in the expression levels of these genes were validated by RT-qPCR. Extracted 179 DEGs included the genes related to chemokine CC motif ligand, T-cell receptor signaling pathway, and PD-L1 expression and PD-1 checkpoint pathway. We focused on chemokine CC motif ligand, and CCL4 was confirmed to be significantly downregulated in the R-group (P=0.039). We also focused on the genes related to T-cell signaling pathway, and CD3E (P=0.039), ITK (P=0.023), and LAT (P=0.023) genes were confirmed to be significantly upregulated in the R-group. The current results suggest that both changes in tumor cells and the interactions between tumor cells and immune cells are associated with the efficacy of the chemotherapy for first remission induction.
- 著者
- Naruki FUJIMOTO Yoshiki TANIGUCHI Hiroko SONODA Yasuyuki KANEKO Toshiyuki MATSUZAKI Teruo ITOH Takuya HIRAI Kazuyuki UCHIDA Masahiro IKEDA
- 出版者
- JAPANESE SOCIETY OF VETERINARY SCIENCE
- 雑誌
- Journal of Veterinary Medical Science (ISSN:09167250)
- 巻号頁・発行日
- pp.23-0278, (Released:2023-12-20)
Aquaporins (AQPs) are water channel proteins, and the expression of AQPs in carcinoma cells has received much attention over the last 15 years. In the veterinary field, however, little is known about the expression of AQPs. In the present study using immunohistochemistry, we examined the expression of AQP1, AQP3, and AQP5 in canine mammary gland carcinomas. The 27 samples comprised 10 grade I, 12 grade II, and 5 grade III samples (See Materials and Methods section for grade classification method). AQP1 was expressed in only 2 of the grade III carcinomas, and the expression was limited to spindle-shaped cells in the solid structure and on the outside of the solid mass. AQP3-positive cells were observed in 20 of 22 grade I and II samples. On the other hand, among grade III carcinomas, AQP3 was expressed only in spindle-shaped cells in 1 sample. AQP5 was expressed in all grade I and II carcinomas but not in the grade III tumors. In addition, enhanced expression of basolateral AQP3 and apical AQP5 was observed in lobular hyperplastic cells. These results suggest that the expression patterns of AQP3 and AQP5 can be of help for judging the grading of canine mammary tumors and that AQP1 is likely to be involved in metastasis. Moreover, AQP3 and AQP5 might be relevant to lactation in female dogs.
1 0 0 0 OA Application of automated machine learning for histological evaluation of feline endoscopic samples
- 著者
- Tatsuhito II James K CHAMBERS Ko NAKASHIMA Yuko GOTO-KOSHINO Kazuyuki UCHIDA
- 出版者
- JAPANESE SOCIETY OF VETERINARY SCIENCE
- 雑誌
- Journal of Veterinary Medical Science (ISSN:09167250)
- 巻号頁・発行日
- pp.23-0299, (Released:2023-12-18)
Differentiating intestinal T-cell lymphoma from chronic enteropathy (CE) in endoscopic samples is often challenging. In the present study, automated machine learning systems were developed to distinguish between the two diseases, predict clonality, and detect prognostic factors of intestinal lymphoma in cats. Four models were created for four experimental conditions: experiment 1 to distinguish between intestinal T-cell lymphoma and CE; experiment 2 to distinguish large cell lymphoma, small cell lymphoma, and CE; experiment 3 to distinguish granzyme B+ lymphoma, granzyme B- lymphoma, and CE; and experiment 4 to distinguish between T-cell receptor (TCR) clonal population and TCR polyclonal population. After each experiment, a pathologist reviewed the test images and scored for lymphocytic infiltration, epitheliotropism, and epithelial injury. The models of experiments 1–4 achieved area under the receiver operating characteristic curve scores of 0.943 (precision, 87.59%; recall, 87.59%), 0.962 (precision, 86.30%; recall, 86.30%), 0.904 (precision, 82.86%; recall, 80%), and 0.904 (precision, 81.25%; recall, 81.25%), respectively. The images predicted as intestinal T-cell lymphoma showed significant infiltration of lymphocytes and epitheliotropism than CE. These models can provide evaluation tools to assist pathologists with differentiating between intestinal T-cell lymphoma and CE.