检索结果-南通市图书馆

Heat stress affects mammary metabolism by influencing the plasma flow to the glands

JOURNAL OF ANIMAL SCIENCE AND BIOTECHNOLOGY 2024年第1期15卷 1-10页

作者： Zeng, Jia Wang, Diming Sun, Huizeng Liu, Hongyun Zhao, Feng-Qi Liu, Jianxin Zhejiang Univ Inst Dairy Sci Coll Anim Sci Hangzhou Peoples R China Zhejiang Univ Zhejiang Key Lab Dairy Cow Genet Improvement & Mil Hangzhou Peoples R China Univ Vermont Dept Anim & Vet Sci Burlington VT USA

Background Environmental heat stress (HS) can have detrimental effects on milk production by compromising the mammary function. Mammary plasma flow (MPF) plays a crucial role in nutrient supply and uptake in the mammary gland. In this experiment, we investigated the physiological and metabolic changes in high-yielding cows exposed to different degrees of HS: no HS with thermal-humidity index (THI) below 68 (No-HS), mild HS (Mild-HS, 68 blood oxygen supply and mammary glucose uptake and utilization. Results Compared with No-HS, the MPF of dairy cows was greater (P flow were significantly increased (P < 0.01) under Mild-HS but significantly decreased (P < 0.01) under Mod-HS compared to No-HS. Glucose uptake (P < 0.01) and clearance rates (P < 0.01) were significantly reduced under Mod-HS compared to those under No-HS and Mild-HS. Under Mild-HS, there was a significant decrease (P < 0.01) in the ratio of lactose yield to mammary glucose supply compared to that under No-HS and Mod-HS, with no difference (P = 0.53) in the ratio of lactose yield to uptaken glucose among different HS situations. Conclusions Degrees of HS exert different influences on mammary metabolism, mainly by altering MPF in dairy cows. The output from this study may help us to develop strategies to mitigate the impact of different degrees of HS on milk production.

关键词： Dairy cow Heat stress Mammary metabolism Mammary plasma flow AMINO-ACID UTILIZATION blood-flow DAIRY-COWS MILK-PRODUCTION GLUCOSE INSULIN LACTATION TRANSPORT SYSTEMS

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

HEMODYNAMIC EFFECTS AND THE EFFECTIVE TREATMENT OF NALOXONE ON EXPERIMENTAL ACUTE PANCREATITIS IN DOGS

引用

中华医学杂志(英文版) 1992年第11期105卷 957-963页

作者：沈骥黄懋魁伍福乐汤文浩曹红勇张辉骆明德 210009

Dog model of acute pancreatitis,induced byintrapancreatoductal injection of fresh trypsin-bilemixture,was used to investigate the effects ofnaloxone on hemodynamic changes in *** the control group,acute pancreatitiswas induced and characterized hemodynamically bythe decrease in maximum positive and negative dP/dt(±dP/dt),cardiac output（CO）and cardiac index（CI）,and increase in pulmonary vascular resistance（PVR）and systemic vascular resistance（SVP）,as wellas early reduction of pancreatic blood flow（PBF）.Inthe naloxone treated group,naloxone was givenintravenously 10 minutes after the induction of acutepancreatitis（80μg/kg as a bolus+80μg/kg/h for3 hours）.It was found that naloxone significantly in-creased PBF and the ±dP/dteffectively pre-vented the significant decrease in CO,CI and increasein PVR,SVR observed in untreated acute pancreatitis;and significantly reduced the severity of pancreatitis,as assessed by both histological staging and *** results suggest that naloxone appears tolimit the progression from edmatous to hemorrhagicpancreatitis through preserving PBF and improvingsystemic hemodynamics at the early phase of acutepancreatitis;hence the hypothesis that endogenousopioid peptides may play a role in the pathophysiologyof acute pancreatitis.

关键词： blood-flow ISCHEMIA

来源：

同方期刊数据库评论

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：