Evidence map›Paper›PMID 38965570›Full record

ArticleJournal of animal science and biotechnology2024

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

Jia Zeng, Diming Wang, Huizeng Sun, Hongyun Liu, Feng-Qi Zhao, Jianxin Liu

Abstract read
In one paragraph

Article in Journal of animal science and biotechnology, 2024. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 2 papers.

0numbers the graph read from it
0cells of the map it votes in
2citing papers in PubMed
–field-weighted citation impact
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

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Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

2 citing papers in PubMed.

  1. Article
  2. Article
4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

6 authors.

Jia ZengInstitute of Dairy Science, College of Animal Sciences, Zhejiang University, Hangzhou, China.
Diming WangInstitute of Dairy Science, College of Animal Sciences, Zhejiang University, Hangzhou, China.
Huizeng SunInstitute of Dairy Science, College of Animal Sciences, Zhejiang University, Hangzhou, China.
Hongyun LiuInstitute of Dairy Science, College of Animal Sciences, Zhejiang University, Hangzhou, China.
Feng-Qi ZhaoDepartment of Animal & Veterinary Sciences, University of Vermont, Burlington, VT, USA.
Jianxin LiuInstitute of Dairy Science, College of Animal Sciences, Zhejiang University, Hangzhou, China. liujx@zju.edu.cn.ORCID http://orcid.org/0000-0002-5812-5186

Funding

National Nature Science Foundation 31930101National Nature Science Foundation U23A20231
6 · The paper itself

Abstract

backgroundEnvironmental 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 ≤ THI ≤ 79), and moderate HS (Mod-HS, 79 < THI ≤ 88) in their natural environment. Our study focused on the changes in blood oxygen supply and mammary glucose uptake and utilization.

resultsCompared with No-HS, the MPF of dairy cows was greater (P < 0.01) under Mild-HS, but was lower (P < 0.01) in cows under Mod-HS. Oxygen supply and consumption exhibited similar changes to the MPF under different HS, with no difference in ratio of oxygen consumption to supply (P = 0.46). The mammary arterio-vein differences in glucose concentration were lower (P < 0.05) under Mild- and Mod-HS than under no HS. Glucose supply and 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.

conclusionsDegrees 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.

Indexed as

Dairy cowHeat stressMammary metabolismMammary plasma flow

Identifiers

PMID38965570
PMCPMC11225325

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Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.