T cell rich,B cell lymphoma in the small colon of a yearling horse     

K. M. Smith  C. K. Clark  M. J. Dark  M. Kiupel  J. Gary 《Equine Veterinary Education》2013,25(2):74-78

A one‐year‐old, Thoroughbred colt presented for evaluation due to a one month history of fever of unknown origin and progressive weight loss. On initial presentation, the horse was febrile and showed signs localised to the respiratory tract. These included bilaterally increased bronchovesicular sounds and a moderate, diffuse interstitial pattern on thoracic radiographs. A transtracheal wash yielded mucopurulent debris, culture of which grew small numbers of Staphylococcus epidermidis and Aspergillus spp. The horse was discharged with a diagnosis of bronchointerstitial pneumonia and placed on antibiotic therapy. Ten days after initial presentation, he developed abdominal pain that was unresponsive to on‐farm treatment. The horse was febrile, displayed increased respiratory rate and effort, and showed moderate signs of abdominal pain. On rectal examination, a firm, 8–10 cm mass was palpated on midline. The colt was admitted to the hospital and scheduled for exploratory laparotomy, but died a short time later before surgery could be performed. This report describes the clinical, diagnostic and histopathological findings of a case of alimentary lymphoma in a yearling colt.  相似文献   

Caecal lipomatosis as a cause of colic in a 9‐year‐old gelding     

M. P. de Bont  A. J. Malbon  D. Sardon  D. C. Archer 《Equine Veterinary Education》2013,25(5):241-244

Lipomatosis is an uncommon cause of colic. This case report details the pre‐ and intraoperative findings of a 9‐year‐old gelding, presented with acute abdominal pain. Exploratory laparotomy revealed a massive fatty infiltrate involving an extensive portion of the base and mid‐body of the caecum. To the authors' knowledge, this is the first report of an infiltrative lipomatous lesion of the equine caecum.  相似文献   

Effect of a novel solution for organ preservation on equine large colon in an isolated pulsatile perfusion system     

Polyak MM  Morton AJ  Grosche A  Matyjaszek S  Freeman DE 《Equine veterinary journal》2008,40(4):306-312

REASONS FOR PERFORMING STUDY: Several therapeutic agents have been tested in models of ischaemia and reperfusion injury (IRI) in equine jejunum, with mixed results. This study was based on the use of an organ perfusion solution (OPS) designed to protect human allografts from IRI. HYPOTHESIS: A modified OPS can preserve the integrity of equine large colon during 12 h of isolated pulsatile perfusion, in the absence of oxygen and blood. METHODS: Segments of large colon were removed from anaesthetised horses, the contents removed and the mucosa rinsed with 0.9% saline. Experimental segments were perfused for 12 h with one litre modified OPS (n = 7) delivered by pulsatile flow through an extracorporeal circuit. Control segments (n = 4) were perfused on the same circuit with one litre of autologous blood. Vascular resistance, flow and pressure were measured serially, and aliquots of OPS and blood drawn hourly for routine biochemical analyses. Mucosal biopsies of the experimental and control segments were taken at 0, 6 and 12 h and in vivo mucosal tissue at 0 h for baseline comparison. All biopsies underwent histomorphometric analysis and immunohistochemical assessment of calprotectin activity. RESULTS: All colon segments were machine perfused without technical complications. Vascular and biochemical indices remained constant over 12 h in the OPS group, and were constant over 6 h in the control group, but deteriorated later. Mucosal integrity, expression of cyclooxygenases-1 and -2, and expression of mucosal calprotectin were unchanged in the OPS group compared with the baseline tissues, and mucosal integrity was superior to the control tissues. CONCLUSIONS: A modified OPS designed to target specific pathways of damage from IRI can preserve colonic mucosal integrity for 12 h in the absence of blood and oxygen.  相似文献   

Detection of calprotectin and its correlation to the accumulation of neutrophils within equine large colon during ischaemia and reperfusion     

Grosche A  Morton AJ  Polyak MM  Matyjaszek S  Freeman DE 《Equine veterinary journal》2008,40(4):393-399

REASON FOR PERFORMING STUDY: The cytosolic protein complex, calprotectin, is abundant in neutrophils and could be used to improve the ability to localise and assess neutrophil infiltration in the equine intestine during ischaemia and reperfusion (I/R), but further study is required. OBJECTIVES: To assess the number of calprotectin-containing cells by immunohistochemistry in correlation with direct counting and scoring of neutrophils in the equine colon during I/R. METHODS: One and 2 h ischaemia of the left dorsal colon were induced, followed by 30 min reperfusion under general anaesthesia or by 18 h reperfusion after anaesthetic recovery. Biopsies were processed for light microscopy and stained with H/E for detection of neutrophils. To identify calprotectin-containing cells, immunohistochemistry was performed on formalin-fixed tissues with the murine MAC 387 antibody and a biotin-free peroxidase staining procedure. The number of neutrophils within submucosal venules and the colonic mucosa were calculated and compared with the number of calprotectin-positive cells. RESULTS: The number of calprotectin-positive cells within submucosal venules and within the colonic mucosa correlated significantly with the accumulation of neutrophils within the corresponding tissue segments. Within the submucosal venules, both calprotectin-positive cells and H/E-stained neutrophils increased with duration of ischaemia and peaked after 30 min of reperfusion. After 18 h reperfusion the number of these cells declined within the vessels. After 2 h ischaemia, neutrophils started to migrate into the mucosa towards the epithelium, with a significant increase over time during reperfusion, and peak infiltration after 18 h reperfusion. CONCLUSIONS: Neutrophil infiltration into the colon after I/R is a time-dependent process, involving migration through the submucosa towards the epithelium.  相似文献   

The production of short chain fatty acid and colonic development in weaning piglets     

Zirui Zhou  Jie Zhang  Xianlian Zhang  Shilan Mo  Xian Tan  Lixia Wang  Jianzhong Li  Yali Li  Xueqin Ding  Xianyong Liu  Xingqun Ma  Huansheng Yang  Yulong Yin 《Journal of animal physiology and animal nutrition》2019,103(5):1530-1537

Weaning process widely affects the small intestinal structure and function in piglets, while the responses of large intestine to weaning stress are still obscure. The purpose of this study was to determine the developmental changes (i.e., short chain fatty acids (SCFAs) concentrations, growth parameters, crypt‐related indices and antioxidant capacity) in colon of piglet during weaning. Forty piglets were weaned at day 21 and euthanized to collect colonic tissues and digesta samples on day 0, 1, 3, 7 and 14 post‐weaning (n = 8). Piglet growth performance was improved (p < .001) on day 7 and 14 post‐weaning. The concentrations of acetate, propionate, butyrate, valerate, isobutyrate, isovalerate and total SCFAs were higher (p < .001) during the late post‐weaning period. The mRNA abundances of SCFAs transporters were greater (p < .001) on day 7 and 14. The absolute and relative weights, absolute length and perimeter of colon were greater (p < .001) on day 7 and 14. Similarly, post‐weaning increases (p < .001) in colonic crypt depth and Ki67 positive cells numbers per crypt were observed during the same period. Colonic crypt fission indices decreased (p < .01), while total crypt numbers increased (p < .001) on day 14 after weaning. Moreover, total SCFAs concentration was significantly associated with colonic growth parameters and Ki67 cells/crypt (p < .001). In addition, catalase content was decreased on day 3, 7, and 14, whereas, the concentrations of total superoxide dismutase (T‐SOD) and manganese‐containing superoxide dismutase (MnSOD) were higher (p < .05) on day 1 and 3 post‐weaning. These results showed that weaning process has a significant effect on colonic growth and development, which might be associated with the change of SCFAs concentrations in colon.  相似文献   

Apoptotic Activity of New Oxisterigmatocystin Derivatives from the Marine-Derived Fungus Aspergillus nomius NC06     

Muh. Ade Artasasta  Yanwirasti Yanwirasti  Muhammad Taher  Akmal Djamaan  Ni Putu Ariantari  Ru Angelie Edrada-Ebel  Dian Handayani 《Marine drugs》2021,19(11)

Sponge-derived fungi have recently attracted attention as an important source of interesting bioactive compounds. Aspergillus nomius NC06 was isolated from the marine sponge Neopetrosia chaliniformis. This fungus was cultured on rice medium and yielded four compounds including three new oxisterigmatocystins, namely, J, K, and L (1, 2, and 3), and one known compound, aspergillicin A (4). Structures of the compounds were elucidated by 1D and 2D NMR spectroscopy and by high-resolution mass spectrometry. The isolated compounds were tested for cytotoxic activity against HT 29 colon cancer cells, where compounds 1, 2, and 4 exhibited IC₅₀ values of 6.28, 15.14, and 1.63 µM, respectively. Under the fluorescence microscope by using a double staining method, HT 29 cells were observed to be viable, apoptotic, and necrotic after treatment with the cytotoxic compounds 1, 2, and 4. The result shows that compounds 1 and 2 were able to induce apoptosis and cell death in HT 29 cells.  相似文献   

Colonic volvulus with defects of the mesenteric attachments in a yearling Friesian colt     

E. J. Knowles  T. S. Mair 《Equine Veterinary Education》2009,21(8):396-400

This report describes an unusual case of colonic volvulus associated with multiple mesenteric abnormalities. A yearling Friesian colt presented with signs of colic that persisted despite analgesia. The colt showed signs of circulatory compromise and had abnormal findings on rectal palpation. An exploratory laparotomy was performed. A complete volvulus of the ascending colon was identified associated with multiple mesenteric anomalies of unknown aetiology. The colt was subjected to euthanasia due to the extent of the intestinal damage and the likelihood of recurrence. The authors speculate that the anomalies may have been of genetic aetiology associated with a restricted gene pool.  相似文献   

人乳腺癌细胞、结肠癌细胞和宫颈癌细胞生长曲线测定     

李鹏  马艳娇  宫鹏涛  李建华  欧阳红生  张西臣 《黑龙江八一农垦大学学报》2011,23(2):27-29

为检测比较人乳腺细胞(MDA-MB-231、MCF-7、HBL-100)、人结肠癌细胞(HCT-8)和人宫颈癌细胞(HeLa)生长曲线的差异性.本实验首先常规培养MDA-MB-231、MCF-7、HBL-100、HCT-8和HeLa细胞,然后应用MTT方法测定这几种细胞的生长曲线.在本实验条件下,这几种细胞生长速度从高...  相似文献   

姜黄素调控Notch1信号通路诱导结肠癌SW480细胞株凋亡     

刘少琼  杨芳  禹正杨  李春花  刘娅  刘婉莹 《勤云标准版测试》2015,35(8)

目的 从Notch1信号通路探讨姜黄素诱导结肠癌SW480细胞株凋亡的分子机制。方法 （1）利用流式细胞技术检测不同浓度姜黄素（0,7.5,15,30,60 μmol/L）处理结肠癌SW480株24 h和48 h后的细胞凋亡情况。（2）通过RT-PCR检测不同浓度姜黄素（0,7.5,15,30,60 μmol/L）处理结肠癌SW480细胞株24 h和48 h后,Notch1信号通路中膜受体基因Notch1及下游靶基因Hes-1 mRNA表达情况,观察姜黄素对Notch1信号通路中Notch1及Hes-1基因mRNA表达的影响。结果 （1）姜黄素能诱导结肠癌SW480细胞株凋亡;（2）姜黄素能一定程度上下调Notch1信号通路中Notch1及Hes-1基因mRNA的表达（P＜0.05）。结论 姜黄素能一定程度上诱导结肠癌SW480细胞株凋亡,这种对结肠癌SW480细胞毒性作用可能与调控Notch1信号通路中膜受体基因Notch1及下游靶基因Hes-1转录有关。  相似文献   

A case of a colocolic intussusception in a horse     

V. Albanese  B. Credille  A. Ellis  L. Baldwin  P. O. E. Mueller  A. Woolums 《Equine Veterinary Education》2011,23(6):281-285

The purpose of this report is to describe the clinical course and pathological findings in a horse admitted to the emergency service of the University of Georgia Large Animal Teaching Hospital for evaluation of colic, fever and diarrhoea of several days' duration. A presumptive historical diagnosis of colitis was made initially, but, due to the lack of faecal output during the first 12 h of hospitalisation and subsequent examination findings, an impaction of the ascending colon was suspected. Initial therapy consisted of rehydration with oral fluids and management of the abdominal pain with analgesic therapy. The horse did not respond to medical therapy and because of signs of persistent abdominal pain and financial constraints, the owner elected euthanasia after several days of supportive care. At necropsy, the horse was diagnosed with a colocolic intussusception.  相似文献