Refinar búsqueda
Resultados 181-190 de 777
Induction of apoptosis in mouse spleen cells by Ginsenoside Rp1
2013
Oh, Y., Jeju National University, Jeju, Republic of Korea | Joo, H.G., Jeju National University, Jeju, Republic of Korea
Ginsenoside Rp1 is one of ginseng saponins with chemotherapeutic activity. In this study, we investigated the effects of Rp1 on spleen cells. Spleen is a major immune organ consisted of crucial immune cells, such as T lymphocytes, B lymphocytes, natural killer cells, and some antigen-presenting cells. Although the anti-tumor potential of Rp1 was studied, the effects of Rp1 on immune cells have not investigated yet. A viability assay using 3-[4,5-dimethylthiazol-2-yl]-2,5- diphenyltetrazolium bromide (MTT), flow cytometric analysis, Western blot analysis were used to detect cellular changes on Rp1-treated spleen cells. MTT assay showed that Rp1 decreased the viability of spleen cells. To further investigate the effects of Rp1 on activated spleen cells, we treated lipopolysaccharide (LPS) as a representative inflammatory agent and Rp1 on spleen cells in a combination. The surface expression levels of activation markers for lymphocytes, CD25 and CD69 were measured. Apoptotic analysis revealed the cytotoxic effects of Rp1 on both na?e and activated cells, and the expression pattern of some apoptosis-related proteins was correlated to apoptotic events of cells. Taken together, ginsenoside Rp1 increases the cellular death of spleen cells and also inhibits the LPS-induced activation of spleen cells.
Mostrar más [+] Menos [-]Silhouette differences among cats do not suggest a general selection for paedomorphosis
2013
Pares-Casanova, P.M., University of Lleida, 25198 Lleida, Spain
Paedomorphosis is the retention of juvenile morphology at maturity and is important in generating evolutionary change in domestic species and species in the wild. This preliminary study compared morphological characteristics of seven domestic cat pure breeds and felid species from around the world. An original procedure based on elliptical Fourier (EF) methods was applied to head lateral views of specimens and were assessed in order to analyse head profile. For comparative purposes three domestic kittens of different ages and three species of genus Lynx were also used. EF descriptors, allowed for the quantification of the head profile. Using the Fourier transform, reconstruction of the mean head profile revealed that there was a general shape difference between wild cats, domestic cats and kittens. Results suggested that variability in head profile differentiate quite well between adult cats and kittens, but domestic and wild cats appeared grouped into a similar cluster. The similarity between breeds can thus be attributed more to the general head profile than to flatness, i.e. to the general conformation rather than facial profile. Therefore, no effect of paedomorphism on the studied breeds can be undertaken. The present approach opens interesting ethnological perspectives for the aloidic characterisation for domestic breeds.
Mostrar más [+] Menos [-]Immunohistochemical localization of galectin-3 in the brain with Theiler's murine encephalomyelitis virus (DA strain) infection
2013
Shin, T., Jeju National University, Jeju, Republic of Korea | Carrillo-Salinas, F.J., Instituto Cajal, CSIC, Madrid, Spain | Mart'nez, A.F., Instituto Cajal, CSIC, Madrid, Spain | Mecha, M., Instituto Cajal, CSIC, Madrid, Spain | Guaz,a C., Instituto Cajal, CSIC, Madrid, Spain
Galectin-3 is a β-galactoside-binding lectin that plays a role in neuroinflammation through cell migration, proliferation, and apoptosis. In the present study, regulation of galectin-3 was examined in the brain of mice infected with the Daniel strain of Theiler’s murine encephalomyelitis virus (TMEV) at days 7 and 81 post-infection by immunohistochemistry. Immunohistochemistry revealed that galectin-3 was mainly localized in ionized calcium-binding adapter 1-positive macrophages/activated microglia, but not in Iba-1-positive ramified microglia. Galectin-3 was also weakly detected in some astrocytes in the same encephalitic lesions, but not in neurons and oligodendrocytes. Collectively, the present findings suggest that galectin-3, mainly produced by activated microglia/macrophages, may be involved in the pathogenesis of virus induced acute inflammation in the early stage as well as the chronic demyelinating lesions in Daniel strain of TMEV induced demyelination model.
Mostrar más [+] Menos [-]Protective effects of a mineral aqueous solution on toxicity in mouse liver and kidney
2013
Park, I.J., Chonbuk National University, Jeonju, Republic of Korea | Cha, S.Y., Chonbuk National University, Jeonju, Republic of Korea | Kang, M., Chonbuk National University, Jeonju, Republic of Korea | So, Y.S., Chonbuk National University, Jeonju, Republic of Korea | Bahng, J.Y., Chonbuk National University, Jeonju, Republic of Korea | Jang, H.K., Chonbuk National University, Jeonju, Republic of Korea
We demonstrated that a mineral aqueous solution (MAS) administered to mice functionally and histologically protected against cisplatin-induced acute renal failure (ARF) and CCl4-induced acute liver failure (ALF). In ARF model, 0.4 and 0.2% MAS decreased mortality and the serum concentrations of blood urea nitrogen (BUN) and creatine in mice. Additionally, 0.4 and 0.2% MAS reduced contraction of distal convoluted tubules and suppressed expression of the proinflammatory cytokines interlukein-6 (IL-6) and tumor necrosis factor (TNF-α) in the kidney. In ALF model, 0.4 and 0.2% MAS decreased serum concentrations of alanine aminotransferase and aspartate aminotransferase in mice. Additionally, 0.4 and 0.2% MAS reduced necrotic areas and suppressed expression of IL-6 and TNF-α in the liver. These results indicate that a MAS might have protective effects against ARF and ALF.
Mostrar más [+] Menos [-]Flurbiprofen toxicity in 2 dogs
2013
Lee, Y., Seoul National University, Seoul, Republic of Korea | Nam, E.H., Seoul National University, Seoul, Republic of Korea | Park, S.H., Seoul National University, Seoul, Republic of Korea | Song, C.Y., Seoul National University, Seoul, Republic of Korea | Lee, Y.U., Seoul National University, Seoul, Republic of Korea | Lee, J.M., Seoul National University, Seoul, Republic of Korea | Park, J.H., Seoul National University, Seoul, Republic of Korea | Hwang, C.Y., Seoul National University, Seoul, Republic of Korea
Two dogs were presented with melena, vomiting and depression after accidental swallowing of candy form of Strepsils (flurbiprofen), which is one of non-steroidal anti-inflammatory drugs used in human medicine for controlling a sore throat. These dogs had common signs of anemia induced by gastrointestinal ulceration and hemorrhage with azotemia and leukocytosis. The dogs were treated with blood transfusion, fluid therapy, proton-pump inhibitor, antiemetics, mucus protectant and antibiotic. Although most of clinical signs of two dogs were resolved, azotemic problem with evidence of renal injury have remained.
Mostrar más [+] Menos [-]Clinical trial of diltiazem on dystrophic calcinosis cutis in a dog
2013
Cho, N.Y., Chungnam National University, Daejeon, Republic of Korea | Cho, D.H. | Choi, H.J. | Jeong, S.M. | Lee, Y.W. | Park, S.J.
Dystrophic calcinosis cutis associated with spontaneous hyperadrenocorticism was diagnosed in a 8-yearold female Chihuahua dog with erythematous, erosive, numerous papules, plaques, and crusts on the bilateral trunk, and inguinal region. Serum biochemical abnormalities included increases in alkaline phosphatase (ALP), alanine aminotransferase (ALT), gamma-glutamyl transpeptidase (GGT), and cholesterol. Radiographs showed mild hepatomegaly and subcutaneous lobulated calcific deposits. Histopathologic examination demonstrated diffuse deposition of basophilic calcified material in the dermis. Von Kossa’s stain confirmed calcium deposition. Therapy with diltiazem was useful in resolving calcinosis.
Mostrar más [+] Menos [-]Metastatic thyroid C-cell carcinoma in a beagle dog
2013
Lee, S., Irion Animal Hospital, Seoul, Republic of Korea | Lee, M., Irion Animal Hospital, Seoul, Republic of Korea | Youp, K., Irion Animal Hospital, Seoul, Republic of Korea | Lee, A., Irion Animal Hospital, Seoul, Republic of Korea | Won, S., Irion Animal Hospital, Seoul, Republic of Korea | Kim, M., Seoul National University, Seoul, Republic of Korea | Kim, S., Seoul National University, Seoul, Republic of Korea | Kim, Y., Seoul National University, Seoul, Republic of Korea
An adult beagle dog was presented with a cervical mass detected by palpation and computed tomography. Fine needle aspirates revealed numerous epithelial cells with plasmacytoid appearance and frequent naked nuclei. Histologically, the mass consists of multiple packets of neoplastic cells and extensive areas of necrosis and fibrosis. Neoplastic cells were also found in submandibular lymph nodes. Immunohistochemistry showed that neoplastic cells were positive for calcitonin and negative for thyroglobulin. Based on these findings, the cervical mass was diagnosed as thyroid C-cell carcinoma. Almost one year after the surgical excision, the dog remains healthy without any symptom of recurrence or metastasis.
Mostrar más [+] Menos [-]Development and evaluation of protective capacity of Salmonella Enteritidis polyphosphate kinase-deleted and temperature-sensitive mutant
2013
Kim, K., Kangwon National University, Chuncheon, Republic of Korea | Park, S., Kangwon National University, Chuncheon, Republic of Korea | Cho, Y., Kangwon National University, Chuncheon, Republic of Korea | Kwak, J.Y., Kangwon National University, Chuncheon, Republic of Korea | Kang, Z.W., Kangwon National University, Chuncheon, Republic of Korea | Kim, E.H., ChoongAng Vaccine Lab., DaeJeon, Republic of Korea | Choi, H.W., ChoongAng Vaccine Lab., DaeJeon, Republic of Korea | Won, H.K., ChoongAng Vaccine Lab., DaeJeon, Republic of Korea | Noh, Y.H., ChoongAng Vaccine Lab., DaeJeon, Republic of Korea | Hahn, T.W.
This study was focusing on evaluating the protection of polyphosphate kinase (ppk) deleted and/or temperature-sensitive (ts) Salmonella Enteritidis (SE) as an attenuated vaccine in chickens. We constructed SEppk, SEts and SEppk::ts mutants and screened those mutants by growth capability in vitro, protection study in mice model and antibody response in chickens. Among the mutants, SEppk::ts-3 was selected because it showed higher growth capability, good protection against highly virulent SE in mice model, and good antibody response in chickens. SEppk::ts-3 also showed good protection against highly virulent SE isolate because it decreased colonization of virulent SE challenge strain in spleen, liver and cecum compared with the non-vaccinated control. The SEppk::ts-3 mutant showed crossprotection against S. Gallinarum (SG) challenge although the its cross-protection rate was a little lower than that of SG9R, a commercial vaccine against SG infection. To use for live attenuated vaccine in chickens, it should further be characterized.
Mostrar más [+] Menos [-]Souvenir made of tiger part revealed to be Banteng (Bos javanicus): species identification using DNA sequence analysis
2013
Lee, S.J., Seoul National University, Seoul, Republic of Korea | Hyun, J.Y., Seoul National University, Seoul, Republic of Korea | Min, M.S., Seoul National University, Seoul, Republic of Korea | Lee, M.Y., Seoul National University, Seoul, Republic of Korea | Lee, H., Seoul National University, Seoul, Republic of Korea
Tigers are one of the most endangered species over the world and protected internationally or locally. However, they are still traded illegally for the Traditional East Asia Medicine or souvenirs / mementos as well as fake products. In the present study, to identify the species of the specimen known as the tiger’s genitalia that was sold for mementos in China, two approaches of genetic tools and morphological comparisons were applied. On the basis of the entire sequences of mitochondrial cytochrome b gene (1,140 bp), the result of nucleotide comparisons showed that the specimen examined here is matched with banteng, Bos javanicus (Identities = 1,138/1,140; 99%). In addition, the examination of external morphological characters revealed that the genitalia of the specimen is much more similar to the one of cows, not to tigers. The outcomes highlighted that there are still some fake products of tigers traded in market and molecular genetic tools could help identifying species of wildlife products.
Mostrar más [+] Menos [-]Palmar annular ligament desmitis in horses: retrospective study between desmotomy and desmectomy techniques
2013
Escodro, P.B., Federal University of Alagoas, Vicosa, Brazil | Lopes, P.F.R., Federal University of Alagoas, Vicosa, Brazil | Bruhn, F.R.P., Federal University of Alagoas, Vicosa, Brazil
This study evaluated two different surgical techniques for the treatment of palmar annular ligament desmitis (PAL) in horses. The group 1 (G1) consisted of 11 Thoroughbred submitted to desmotomy, and G2 of 22 horses that underwent PAL desmectomy. There was no statistically significant difference between mean palmar annular ligament thickness in both groups evaluated (p = 0.800). In this study, the horses of G1 had 12 times more chance to return to physical activity, when compared to animals of G2 (p = 0.033; O.R. = 12.0; C.I.95% = 1,142-126,122). Desmectomy was more efficient in promoting the resolution of the injury and the return to sports activity.
Mostrar más [+] Menos [-]