Hesperidin ameliorates H <sub>2</sub>O <sub>2</sub>-induced bovine mammary epithelial cell oxidative stress via the Nrf2 signaling pathway

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Abstract

Background

Hesperidin is a citrus flavonoid with anti-inflammatory and antioxidant potential. However, its protective effects on bovine mammary epithelial cells (bMECs) exposed to oxidative stress have not been elucidated.

Results

In this study, we investigated the effects of hesperidin on H ₂O ₂-induced oxidative stress in bMECs and the underlying molecular mechanism. We found that hesperidin attenuated H ₂O ₂-induced cell damage by reducing reactive oxygen species (ROS) and malondialdehyde (MDA) levels, increasing catalase (CAT) activity, and improving cell proliferation and mitochondrial membrane potential. Moreover, hesperidin activated the Keap1/Nrf2/ARE signaling pathway by inducing the nuclear translocation of Nrf2 and the expression of its downstream genes NQO1 and HO-1, which are antioxidant enzymes involved in ROS scavenging and cellular redox balance. The protective effects of hesperidin were blocked by the Nrf2 inhibitor ML385, indicating that they were Nrf2 dependent.

Conclusions

Our results suggest that hesperidin could protect bMECs from oxidative stress injury by activating the Nrf2 signaling pathway, suggesting that hesperidin as a natural antioxidant has positive potential as a feed additive or plant drug to promote the health benefits of bovine mammary.

Graphical Abstract

Supplementary Information

The online version contains supplementary material available at 10.1186/s40104-024-01012-9.

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The transcription factor Nrf2, which normally exists in an inactive state as a consequence of binding to a cytoskeleton-associated protein Keap1, can be activated by redox-dependent stimuli. Alteration of the Nrf2-Keap1 interaction enables Nrf2 to translocate to the nucleus, bind to the antioxidant-responsive element (ARE) and initiate the transcription of genes coding for detoxifying enzymes and cytoprotective proteins. This response is also triggered by a class of electrophilic compounds including polyphenols and plant-derived constituents. Recently, the natural antioxidants curcumin and caffeic acid phenethyl ester (CAPE) have been identified as potent inducers of haem oxygenase-1 (HO-1), a redox-sensitive inducible protein that provides protection against various forms of stress. Here, we show that in renal epithelial cells both curcumin and CAPE stimulate the expression of Nrf2 in a concentration- and time-dependent manner. This effect was associated with a significant increase in HO-1 protein expression and haem oxygenase activity. From several lines of investigation we also report that curcumin (and, by inference, CAPE) stimulates ho-1 gene activity by promoting inactivation of the Nrf2-Keap1 complex, leading to increased Nrf2 binding to the resident ho-1 AREs. Moreover, using antibodies and specific inhibitors of the mitogen-activated protein kinase (MAPK) pathways, we provide data implicating p38 MAPK in curcumin-mediated ho-1 induction. Taken together, these results demonstrate that induction of HO-1 by curcumin and CAPE requires the activation of the Nrf2/ARE pathway.

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In recent years, more attention has been paid to natural sources of antioxidants. Flavonoids are natural substances synthesized in several parts of plants that exhibit a high antioxidant capacity. They are a large family, presenting several classes based on their basic structure. Flavonoids have the ability to control the accumulation of reactive oxygen species (ROS) via scavenger ROS when they are formed. Therefore, these antioxidant compounds have an important role in plant stress tolerance and a high relevance in human health, mainly due to their anti-inflammatory and antimicrobial properties. In addition, flavonoids have several applications in the food industry as preservatives, pigments, and antioxidants, as well as in other industries such as cosmetics and pharmaceuticals. However, flavonoids application for industrial purposes implies extraction processes with high purity and quality. Several methodologies have been developed aimed at increasing flavonoid extraction yield and being environmentally friendly. This review presents the most abundant natural flavonoids, their structure and chemical characteristics, extraction methods, and biological activity.

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Researches dedicated to reactive oxygen species (ROS) had been performed for decades, yet the outcomes remain controversial. With the relentless effort of studies, researchers have explored the role of ROS in biosystem and various diseases. ROS are beneficial for biosystem presenting as signalling molecules and enhancing immunologic defence. However, they also have harmful effects such as causing tissue and organ damages. The results are controversial in studies focusing on ROS and ROS-related diseases by regulating ROS with inhibitors or promotors. These competing results hindered the process for further investigation of the specific mechanisms lying behind. The opinions presented in this review interpret the researches of ROS from a different dimension that might explain the competing results of ROS introduced so far from a broader perspective. This review brings a different thinking to researchers, with the neglected features and potentials of ROS, to relate their works with ROS and to explore the mechanisms between their subject and ROS.

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Author and article information

Contributors

Xuefeng Han: xfhan@isa.ac.cn

Journal

Journal ID (nlm-ta): J Anim Sci Biotechnol

Journal ID (iso-abbrev): J Anim Sci Biotechnol

Title: Journal of Animal Science and Biotechnology

Publisher: BioMed Central (London )

ISSN (Print): 1674-9782

ISSN (Electronic): 2049-1891

Publication date (Electronic): 9 April 2024

Publication date PMC-release: 9 April 2024

Publication date Collection: 2024

Volume: 15

Electronic Location Identifier: 57

Affiliations

[1 ]GRID grid.9227.e, ISNI 0000000119573309, CAS Key Laboratory for Agro-Ecological Processes in Subtropical Region, National Engineering Laboratory for Pollution Control and Waste Utilization in Livestock and Poultry Production, Hunan Provincial Key Laboratory of Animal Nutritional Physiology and Metabolic Process, Institute of Subtropical Agriculture, , Chinese Academy of Sciences, ; Changsha, 410125 Hunan China

[2 ]GRID grid.464332.4, State Key Laboratory of Animal Nutrition and Feeding, , Institute of Animal Sciences, Chinese Academy of Agricultural Sciences, ; Beijing, 100193 China

Article

Publisher ID: 1012

DOI: 10.1186/s40104-024-01012-9

PMC ID: 11003082

PubMed ID: 38589950

SO-VID: 47765dbe-c46b-4faf-b5c9-c3879ec67db7

License:

Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/. The Creative Commons Public Domain Dedication waiver ( http://creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated in a credit line to the data.

History

Date received : 9 October 2023

Date accepted : 7 February 2024

Funding

Funded by: Strategic Priority Research Program of the Chinese Academy of Sciences

Award ID: XDA26040304

Award Recipient : Xuefeng Han

Custom metadata

ScienceOpen disciplines: Animal science & Zoology

Keywords: bovine mammary epithelial cell,hesperidin,nrf2 signaling pathway,oxidative stress

Data availability:

ScienceOpen disciplines: Animal science & Zoology

Keywords: bovine mammary epithelial cell, hesperidin, nrf2 signaling pathway, oxidative stress