MCC950 Improves Growth Performance, Ｕric Acid Metabolism and Kidney Injury of Goslings Fed High Protein Diet by Inhibiting Nucleotide Binding Oligomerization Domain-Like Receptor 3 Inflammasome北大核心CSCD

The aim of this study was to evaluate the effects of MCC950 on growth performance, uric acid metabolism, serum inflammatory factor contents and kidney injury of goslings a fed high protein diet, and explore the potential mechanism of nucleotide binding oligomerization domain-like receptor 3 (NLRP3) / cysteine aspartase-1 (Caspase-1) signaling pathway in gosling gout. A total of 120 Yangzhou goslings of 1-day-old were randomly divided into 3 groups, which were control group, high protein group (HP group) and high protein+ MCC950 group (HP+MCC950 group), with 5 replicates in each group and 8 goslings in each replicate. The control group was fed a normal protein diet with 16.5% crude protein, and the HP group and HP+MCC950 group were fed a high protein diet with 24.0% crude protein. The HP+MCC950 group was intraperitoneally injected with MCC950 every 3 days at a dose of 10 mg / kg BW, and the other two groups were injected with the same amount of normal saline. The experiment lasted for 15 days. The results showed as follows: 1) compared with the control group, the average body weight of goslings at 15 days of age in the HP group was significantly decreased (P<0.05); the serum contents of uric acid (UA), creatinine (Cr), urea nitrogen (UN), C-reactive protein (CRP), interleukin-1β (IL-1β), interleukin 18 (IL-18), interleukin 6 (IL-6), tumor necrosis factor α (TNF-α) and transforming growth factor β1 (TGF-β1) in the HP group were significantly increased (P<0.05); the mRNA relative expression levels of NLRP3, Caspase-1, IL-1β and IL-18 and the protein relative expression levels of NLRP3, Caspase-1 and IL-1β in kidney tissues in the HP group were significantly increased (P<0.05). 2) Compared with the HP group, the average body weight of goslings at 10 and 15 days of age in the HP+MCC950 group was significantly increased (P<0.05); the serum contents of UA, Cr, UN, CRP, IL-1β, IL-18, IL-6, TNF-α and TGF-β1 were significantly decreased (P<0.05), while the mRNA relative expression levels of NLRP3, Caspase-1, IL-1β and IL-18 and the protein relative expression levels of NLRP3, Caspase-1 and IL-1β in kidney tissues in the HP+MCC950 group were significantly decreased (P< 0.05). 3) Histological findings showed that the renal tubules of goslings were dilated, and vacuolar degeneration and necrosis occurred in the HP group, while the structure of renal tubules was relatively normal in the HP+MCC950 group. The urate deposition area in kidney tissues of goslings in the HP group was significantly larger than that in the control group (P<0.05), and which in the HP+MCC950 group was significantly smaller than that in the HP group (P<0.05). Moreover, the urate deposition area in kidney tissues of goslings was significantly positively correlated with the protein relative expression level of NLRP3 (r = 0.681, P<0.05). In conclusion, MCC950 can promote the growth of goslings fed a high protein diet and reduce the serum uric acid content, which may be related to the reduction of inflammatory response and kidney injury through its inhibition of NLRP3 / Caspase-1 signaling pathway. © 2023 Authors. All rights reserved.     

丘北县半夏无公害栽培技术

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响应面法优化川西獐牙菜中三种环烯醚萜苷的提取工艺研究

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本试验旨在研究大黄素对慢性肾衰竭(CRF)宠物犬氧化应激和微炎症状态的影响，选取47例犬慢性肾衰竭临床病例，随机分为常规治疗组(UT组，n=8)、低剂量大黄素治疗组(LRT组，n=12)、中剂量大黄素治疗组(MRT组，n=12)和高剂量大黄素治疗组(HRT组，n=15),同时选择10例健康犬作为对照组(CG组)。UT组患犬治疗方案为口服复方α-酮酸片(1片/次，2次/d)+自由采食肾脏处方粮，LRT组、MRT组和HRT组分别在UT组治疗基础上按25、50 mg/(kg·bw·d)和100 mg/(kg·bw·d)口服大黄素。试验前后分别采集血液、尿液，测定肾功能指标、氧化应激指标和炎症指标。结果显示：各治疗组的血清肌酐(Scr)、尿素氮(BUN)和尿肾脏损伤因子-1(KIM-1)均显著低于治疗前(P<0.05);治疗后，HRT组Scr、BUN和KIM-1均低于MRT组、LRT组和UT组(P<0.05);与UT组比较，HRT组丙二醛(MDA)、尿8-羟基脱氧鸟苷(8-OH-dG)、C反应蛋白(CRP)、白细胞介素6(IL-6)和肿瘤坏死因子α(TNF-α)均显著降低(P<...     

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本研究对浙江省湖州市德清县的青虾养殖塘进行虾血细胞虹彩病毒(SHIV)的监测工作。2020年7—10月分别在2个青虾养殖户中检出感染SHIV的青虾,2021年在对德清县6个乡镇共计12个监测点中发现,50%养殖户的青虾有感染SHIV的情况。对SHIV阳性的青虾肝胰腺进行组织病理学染色分析表明,肝胰腺组织中存在核固缩的现象,同时透射电镜可以观察到疑似SHIV病毒粒子的结构。本研究初步探究了SHIV在日本沼虾中的流行情况,为SHIV与青虾病害的相关性提供了研究基础。     

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