Microbial dysbiosis in the gut–mammary axis as a mechanism for mastitis in dairy cows
Zhiwei Wang
College of Animal Science and Technology, Yangzhou University, Yangzhou, Jiangsu, 225009 China
Contribution: Writing - original draft
Search for more papers by this authorZheng Ma
College of Animal Science and Technology, Yangzhou University, Yangzhou, Jiangsu, 225009 China
Contribution: Supervision
Search for more papers by this authorZhichen Tian
College of Animal Science and Technology, Yangzhou University, Yangzhou, Jiangsu, 225009 China
Contribution: Supervision
Search for more papers by this authorHaoran Jia
College of Animal Science and Technology, Yangzhou University, Yangzhou, Jiangsu, 225009 China
Contribution: Investigation
Search for more papers by this authorLei Zhang
College of Animal Science and Technology, Yangzhou University, Yangzhou, Jiangsu, 225009 China
Contribution: Investigation
Search for more papers by this authorYongjiang Mao
College of Animal Science and Technology, Yangzhou University, Yangzhou, Jiangsu, 225009 China
Joint International Research Laboratory of Agriculture and Agri-Product Safety, the Ministry of Education, Yangzhou University, Yangzhou, Jiangsu, 225009 China
Contribution: Writing - review & editing
Search for more papers by this authorZhangping Yang
College of Animal Science and Technology, Yangzhou University, Yangzhou, Jiangsu, 225009 China
Joint International Research Laboratory of Agriculture and Agri-Product Safety, the Ministry of Education, Yangzhou University, Yangzhou, Jiangsu, 225009 China
Contribution: Writing - review & editing
Search for more papers by this authorXu Liu
College of Veterinary Medicine, Northwest A&F University, Yangling, Shanxi, 712100 China
Contribution: Writing - review & editing
Search for more papers by this authorCorresponding Author
Mingxun Li
College of Animal Science and Technology, Yangzhou University, Yangzhou, Jiangsu, 225009 China
Joint International Research Laboratory of Agriculture and Agri-Product Safety, the Ministry of Education, Yangzhou University, Yangzhou, Jiangsu, 225009 China
*Author for correspondence. E-mail: [email protected]
Contribution: Writing - review & editing
Search for more papers by this authorZhiwei Wang
College of Animal Science and Technology, Yangzhou University, Yangzhou, Jiangsu, 225009 China
Contribution: Writing - original draft
Search for more papers by this authorZheng Ma
College of Animal Science and Technology, Yangzhou University, Yangzhou, Jiangsu, 225009 China
Contribution: Supervision
Search for more papers by this authorZhichen Tian
College of Animal Science and Technology, Yangzhou University, Yangzhou, Jiangsu, 225009 China
Contribution: Supervision
Search for more papers by this authorHaoran Jia
College of Animal Science and Technology, Yangzhou University, Yangzhou, Jiangsu, 225009 China
Contribution: Investigation
Search for more papers by this authorLei Zhang
College of Animal Science and Technology, Yangzhou University, Yangzhou, Jiangsu, 225009 China
Contribution: Investigation
Search for more papers by this authorYongjiang Mao
College of Animal Science and Technology, Yangzhou University, Yangzhou, Jiangsu, 225009 China
Joint International Research Laboratory of Agriculture and Agri-Product Safety, the Ministry of Education, Yangzhou University, Yangzhou, Jiangsu, 225009 China
Contribution: Writing - review & editing
Search for more papers by this authorZhangping Yang
College of Animal Science and Technology, Yangzhou University, Yangzhou, Jiangsu, 225009 China
Joint International Research Laboratory of Agriculture and Agri-Product Safety, the Ministry of Education, Yangzhou University, Yangzhou, Jiangsu, 225009 China
Contribution: Writing - review & editing
Search for more papers by this authorXu Liu
College of Veterinary Medicine, Northwest A&F University, Yangling, Shanxi, 712100 China
Contribution: Writing - review & editing
Search for more papers by this authorCorresponding Author
Mingxun Li
College of Animal Science and Technology, Yangzhou University, Yangzhou, Jiangsu, 225009 China
Joint International Research Laboratory of Agriculture and Agri-Product Safety, the Ministry of Education, Yangzhou University, Yangzhou, Jiangsu, 225009 China
*Author for correspondence. E-mail: [email protected]
Contribution: Writing - review & editing
Search for more papers by this authorAbstract
Mastitis is a significant and costly disease in dairy cows, reducing milk production and affecting herd health. Recent research highlights the role of gastrointestinal microbial dysbiosis in the development of mastitis. This review focuses on how microbial imbalances in the rumen and intestines can compromise the integrity of the gastrointestinal barriers, allowing harmful bacteria and endotoxins, such as lipopolysaccharide, to enter the bloodstream and reach the mammary gland, triggering inflammation. This process links gastrointestinal health to mammary gland inflammation through the gut–mammary axis. Furthermore, disruptions in glucose metabolism and immune responses are implicated in the progression of mastitis. This review underscores the potential for non-antibiotic interventions aimed at restoring microbial balance to reduce mastitis incidence, providing new insights into improving dairy cow health and farm productivity. Our findings emphasise the critical need to explore preventive measures targeting the rumen and intestinal microbiota for effective mastitis control.
CONFLICT OF INTEREST
The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.
Open Research
DATA AVAILABILITY STATEMENT
Data sharing is not applicable to this article as no datasets were generated or analysed during the current study.
References
- Addis M F, Tanca A, Uzzau S, Oikonomou G, Bicalho R C and Moroni P (2016) The bovine milk microbiota: Insights and perspectives from omics studies. Molecular BioSystems 12 2359–2372.
- Ahmadzadeh A, Frago F, Shafii B, Dalton J C, Price W J and McGuire M A (2009) Effect of clinical mastitis and other diseases on reproductive performance of Holstein cows. Animal Reproduction Science 112 273–282.
- Ajose D J, Oluwarinde B O, Abolarinwa T O, Fri J, Montso K P, Fayemi O E, Aremu A O and Ateba C N (2022) Combating bovine mastitis in the dairy sector in an era of antimicrobial resistance: Ethno-veterinary medicinal option as a viable alternative approach. Frontiers in Veterinary Science 9 800322.
- Akhtar M, Guo S, Guo Y-f, Zahoor A, Shaukat A, Chen Y, Umar T, Deng P G and Guo M (2020) Upregulated-gene expression of pro-inflammatory cytokines (TNF-α, IL-1β and IL-6) via TLRs following NF-κB and MAPKs in bovine mastitis. Acta Tropica 207 105458.
- Akhtar M, Naqvi S U, Liu Q et al. (2022) Short chain fatty acids (SCFAs) are the potential immunomodulatory metabolites in controlling Staphylococcus aureus-mediated mastitis. Nutrients 14 3687.
- Andersen P H, Hesselholt M and Jarløv N (1994) Endotoxin and arachidonic acid metabolites in portal, hepatic and arterial blood of cattle with acute ruminal acidosis. Acta Veterinaria Scandinavica 35 223–234.
- Antanaitis R, Juozaitiene V, Jonike V, Baumgartner W and Paulauskas A (2021) Milk lactose as a biomarker of subclinical mastitis in dairy cows. Animals 11 1736.
- Aschenbach J R, Zebeli Q, Patra A K, Greco G, Amasheh S and Penner G B (2019) Symposium review: The importance of the ruminal epithelial barrier for a healthy and productive cow. Journal of Dairy Science 102 1866–1882.
- Baaske L, Gäbel G and Dengler F (2020) Ruminal epithelium: A checkpoint for cattle health. Journal of Dairy Research 87 322–329.
- Baldwin R L and Connor E E (2017) Rumen function and development. Veterinary Clinics of North America: Food Animal Practice 33 427–439.
- Begum R, Thota S, Abdulkadir A, Kaur G, Bagam P and Batra S (2022) NADPH oxidase family proteins: Signaling dynamics to disease management. Cellular & Molecular Immunology 19 660–686.
- Bickhart D M and Weimer P J (2018) Symposium review: Host-rumen microbe interactions may be leveraged to improve the productivity of dairy cows. Journal of Dairy Science 101 7680–7689.
- Buckley A and Turner J R (2018) Cell biology of tight junction barrier regulation and mucosal disease. Cold Spring Harbor Perspectives in Biology 10 a029314.
- Camperio C, Armas F, Biasibetti E, Frassanito P, Giovannelli C, Spuria L, D'Agostino C, Tait S, Capucchio M T and Marianelli C (2017) A mouse mastitis model to study the effects of the intramammary infusion of a food-grade Lactococcus lactis strain. Public Library of Science One 12 e0184218.
- Chow J C, Young D W, Golenbock D T, Christ W J and Gusovsky F (1999) Toll-like receptor-4 mediates lipopolysaccharide-induced signal transduction. Journal of Biological Chemistry 274 10689–10692.
- Ciesielska A, Krawczyk M, Sas-Nowosielska H, Hromada-Judycka A and Kwiatkowska K (2022) CD14 recycling modulates LPS-induced inflammatory responses of murine macrophages. Traffic 23 310–330.
- Dong G, Liu S, Wu Y, Lei C, Zhou J and Zhang S (2011) Diet-induced bacterial immunogens in the gastrointestinal tract of dairy cows: Impacts on immunity and metabolism. Acta Veterinaria Scandinavica 53 48.
- El-Sayed A and Kamel M (2021) Bovine mastitis prevention and control in the post-antibiotic era. Tropical Animal Health and Production 53 236.
- Emmanuel D G, Dunn S M and Ametaj B N (2008) Feeding high proportions of barley grain stimulates an inflammatory response in dairy cows. Journal of Dairy Science 91 606–614.
- Fu Y, He Y, Xiang K, Zhao C, He Z, Qiu M, Hu X and Zhang N (2022) The role of rumen microbiota and its metabolites in subacute ruminal acidosis (SARA)-induced inflammatory diseases of ruminants. Microorganisms 10 1495.
- Galli S J, Borregaard N and Wynn T A (2011) Phenotypic and functional plasticity of cells of innate immunity: Macrophages, mast cells and neutrophils. Nature Immunology 12 1035–1044.
- Gao J, Liu Y C, Wang Y, Li H, Wang X M, Wu Y, Zhang D R, Gao S and Qi Z L (2020) Impact of yeast and lactic acid bacteria on mastitis and milk microbiota composition of dairy cows. AMB Express 10 22.
- Gao X, Wang Z, Xu Y, Feng S, Fu S, Luo Z and Miao J (2024) PFKFB3-meditated glycolysis via the reactive oxygen species-hypoxic inducible factor 1α axis contributes to inflammation and proliferation of Staphylococcus aureus in epithelial cells. Journal of Infectious Diseases 229 535–546.
- Gonen E, Nedvetzki S, Naor D and Shpigel N Y (2008) CD44 is highly expressed on milk neutrophils in bovine mastitis and plays a role in their adhesion to matrix and mammary epithelium. Veterinary Research 39 29.
- Guo H, Xu Y, Huang W, Zhou H, Zheng Z, Zhao Y, He B, Zhu T, Tang S and Zhu Q (2016) Kuwanon G preserves LPS-induced disruption of gut epithelial barrier in vitro. Molecules 21 1597.
- Guo J, Xu L, Khalouei H, Fehr K, Senaratne V, Ghia J E, Yoon I, Khafipour E and Plaizier J C (2022) Saccharomyces cerevisiae fermentation products reduce bacterial endotoxin concentrations and inflammation during grain-based subacute ruminal acidosis in lactating dairy cows. Journal of Dairy Science 105 2354–2368.
- Guzmán-Luna P, Nag R, Martínez I, Mauricio-Iglesias M, Hospido A and Cummins E (2022) Quantifying current and future raw milk losses due to bovine mastitis on European dairy farms under climate change scenarios. Science of the Total Environment 833 155149.
- Hamel J, Zhang Y, Wente N and Krömker V (2021) Heat stress and cow factors affect bacteria shedding pattern from naturally infected mammary gland quarters in dairy cattle. Journal of Dairy Science 104 786–794.
- Haschemi A, Kosma P, Gille L et al. (2012) The Sedoheptulose kinase CARKL directs macrophage polarization through control of glucose metabolism. Cell Metabolism 15 813–826.
- Heumann D and Roger T (2002) Initial responses to endotoxins and gram-negative bacteria. Clinica Chimica Acta 323 59–72.
- Horst E A, Kvidera S K and Baumgard L H (2021) Invited review: The influence of immune activation on transition cow health and performance-a critical evaluation of traditional dogmas. Journal of Dairy Science 104 8380–8410.
- Hu X, Guo J, Zhao C, Jiang P, Maimai T, Yanyi L, Cao Y, Fu Y and Zhang N (2020) The gut microbiota contributes to the development of Staphylococcus aureus-induced mastitis in mice. The ISME Journal 14 1897–1910.
- Hu X, Li S, Mu R, Guo J, Zhao C, Cao Y, Zhang N and Fu Y (2022) The rumen microbiota contributes to the development of mastitis in dairy cows. Microbiology Spectrum 10 e0251221.
- Hu C, Zeng D, Huang Y, Deng Q, Liu S, Zhou W and Zhou W (2024) Sodium butyrate ameliorates atopic dermatitis-induced inflammation by inhibiting HDAC3-mediated STAT1 and NF-κB pathway. Inflammation 47 989–1001.
- Huang F, Teng K, Liu Y, Wang T, Xia T, Yun F and Zhong J (2022) Nisin Z attenuates lipopolysaccharide-induced mastitis by inhibiting the ERK1/2 and p38 mitogen-activated protein kinase signaling pathways. Journal of Dairy Science 105 3530–3543.
- Ikeda T, Nishida A, Yamano M and Kimura I (2022) Short-chain fatty acid receptors and gut microbiota as therapeutic targets in metabolic, immune, and neurological diseases. Pharmacology & Therapeutics 239 108273.
- Ivanov A I (2012) Structure and regulation of intestinal epithelial tight junctions: Current concepts and unanswered questions. Advances in Experimental Medicine and Biology 763 132–148.
- Jami E, Israel A, Kotser A and Mizrahi I (2013) Exploring the bovine rumen bacterial community from birth to adulthood. The ISME Journal 7 1069–1079.
- Jiang C, Hou X, Gao X et al. (2023) The 16S rDNA high-throughput sequencing correlation analysis of milk and gut microbial communities in mastitis Holstein cows. BMC Microbiology 23 180.
- Jin D, Chang G, Zhang K, Guo J, Xu T and Shen X (2016) Rumen-derived lipopolysaccharide enhances the expression of lingual antimicrobial peptide in mammary glands of dairy cows fed a high-concentrate diet. BMC Veterinary Research 12 128.
- Jing X, Wang W, Degen A et al. (2020) Tibetan sheep have a high capacity to absorb and to regulate metabolism of SCFA in the rumen epithelium to adapt to low energy intake. British Journal of Nutrition 123 721–736.
- Kamada N, Seo S U, Chen G Y and Núñez G (2013) Role of the gut microbiota in immunity and inflammatory disease. Nature Reviews Immunology 13 321–335.
- Khafipour E, Krause D O and Plaizier J C (2009) Alfalfa pellet-induced subacute ruminal acidosis in dairy cows increases bacterial endotoxin in the rumen without causing inflammation. Journal of Dairy Science 92 1712–1724.
- Kheirandish P, Petri R M, Sener-Aydemir A, Schwartz-Zimmermann H E, Berthiller F, Zebeli Q and Pacífico C (2022) Characterization of microbial intolerances and ruminal dysbiosis towards different dietary carbohydrate sources using an in vitro model. Journal of Applied Microbiology 133 458–476.
- Krawczyk C M, Holowka T, Sun J et al. (2010) Toll-like receptor-induced changes in glycolytic metabolism regulate dendritic cell activation. Blood 115 4742–4749.
- Lan Y, Sun Q, Ma Z et al. (2022) Seabuckthorn polysaccharide ameliorates high-fat diet-induced obesity by gut microbiota-SCFAs-liver axis. Food & Function 13 2925–2937.
- Li J, Zhao F, Wang Y et al. (2017) Gut microbiota dysbiosis contributes to the development of hypertension. Microbiome 5 14.
- Lima J, Auffret M D, Stewart R D, Dewhurst R J, Duthie C A, Snelling T J, Walker A W, Freeman T C, Watson M and Roehe R (2019) Identification of rumen microbial genes involved in pathways linked to appetite, growth, and feed conversion efficiency in cattle. Frontiers in Genetics 10 701.
- Liu C, Liu C and Fu R (2022) Research progress on the role of PKM2 in the immune response. Frontiers in Immunology 13 936967.
- Liu L, Wu P, Guo A, Yang Y, Chen F and Zhang Q (2023) Research progress on the regulation of production traits by gastrointestinal microbiota in dairy cows. Frontiers in Veterinary Science 10 1206346.
- Lodemann U and Martens H (2006) Effects of diet and osmotic pressure on Na+ transport and tissue conductance of sheep isolated rumen epithelium. Experimental Physiology 91 539–550.
- Luo S, Wang Y, Kang X, Liu P and Wang G (2022a) Research progress on the association between mastitis and gastrointestinal microbes in dairy cows and the effect of probiotics. Microbial Pathogenesis 173 105809.
- Luo Z, Yong K, Luo Q et al. (2022b) Altered fecal microbiome and correlations of the metabolome with plasma metabolites in dairy cows with left displaced abomasum. Microbiology Spectrum 10 e0197222.
- Luvizotto M J, Menezes-Silva L, Woronik V, Monteiro R C and Câmara N O S (2022) Gut-kidney axis in IgA nephropathy: Role on mesangial cell metabolism and inflammation. Frontiers in Cell and Developmental Biology 10 993716.
- Ma C, Sun Z, Zeng B, Huang S, Zhao J, Zhang Y, Su X, Xu J, Wei H and Zhang H (2018) Cow-to-mouse fecal transplantations suggest intestinal microbiome as one cause of mastitis. Microbiome 6 200.
- Mackie R I (2002) Mutualistic fermentative digestion in the gastrointestinal tract: Diversity and evolution. Integrative and Comparative Biology 42 319–326.
- Markowiak-Kopeć P and Śliżewska K (2020) The effect of probiotics on the production of short-chain fatty acids by human intestinal microbiome. Nutrients 12 1107.
- McDougall S, Parker K I, Heuer C and Compton C W (2009) A review of prevention and control of heifer mastitis via non-antibiotic strategies. Veterinary Microbiology 134 177–185.
- Medzhitov R (2009) Approaching the asymptote: 20 years later. Immunity 30 766–775.
- Medzhitov R, Preston-Hurlburt P, Kopp E, Stadien A, Chen C, Ghosh S and Janeway C A (1998) MyD88 is an adaptor protein in the hToll/IL-1 receptor family signaling pathways. Molecular Cell 2 253–258.
- Meyer W, Schoennagel B, Kacza J, Busche R, Hornickel I N, Hewicker-Trautwein M and Schnapper A (2014) Keratinization of the esophageal epithelium of domesticated mammals. Acta Histochemica 116 235–242.
- Michelucci A, Cordes T, Ghelfi J et al. (2013) Immune-responsive gene 1 protein links metabolism to immunity by catalyzing itaconic acid production. Proceedings of the National Academy of Sciences of the United States of America 110 7820–7825.
- Mills E and O'Neill L A (2014) Succinate: A metabolic signal in inflammation. Trends in Cell Biology 24 313–320.
- Mills E L, Ryan D G, Prag H A et al. (2018) Itaconate is an anti-inflammatory metabolite that activates Nrf2 via alkylation of KEAP1. Nature 556 113–117.
- Monteiro H F and Faciola A P (2020) Ruminal acidosis, bacterial changes, and lipopolysaccharides. Journal of Animal Science 98 skaa248.
- Mu Y, Qi W, Zhang T, Zhang J and Mao S (2022) Multi-omics analysis revealed coordinated responses of rumen microbiome and epithelium to high-grain-induced subacute rumen acidosis in lactating dairy cows. mSystems 7 e0149021.
- Myllys V, Honkanen-Buzalski T, Virtanen H, Pyörälä S and Müller H P (1994) Effect of abrasion of teat orifice epithelium on development of bovine staphylococcal mastitis. Journal of Dairy Science 77 446–452.
- Nagahata H, Mukai T, Natsume Y, Okuda M, Ando T, Hisaeda K, Gondaira S and Higuchi H (2020) Effects of intramammary infusion of Bifidobacterium breve on mastitis pathogens and somatic cell response in quarters from dairy cows with chronic subclinical mastitis. Animal Science Journal 91 e13406.
- Nagy C and Haschemi A (2015) Time and demand are two critical dimensions of Immunometabolism: The process of macrophage activation and the pentose phosphate pathway. Frontiers in Immunology 6 164.
- Narayanan K B and Park H H (2015) Toll/interleukin-1 receptor (TIR) domain-mediated cellular signaling pathways. Apoptosis 20 196–209.
- Nishitsuji K, Xiao J, Nagatomo R, Umemoto H, Morimoto Y, Akatsu H, Inoue K and Tsuneyama K (2017) Analysis of the gut microbiome and plasma short-chain fatty acid profiles in a spontaneous mouse model of metabolic syndrome. Scientific Reports 7 15876.
- Ohata A, Usami M and Miyoshi M (2005) Short-chain fatty acids alter tight junction permeability in intestinal monolayer cells via lipoxygenase activation. Nutrition 21 838–847.
- Oikonomou G, Bicalho M L, Meira E, Rossi R E, Foditsch C, Machado V S, Teixeira A G, Santisteban C, Schukken Y H and Bicalho R C (2014) Microbiota of cow's milk; distinguishing healthy, sub-clinically and clinically diseased quarters. Public Library of Science One 9 e85904.
- Oliveira L, Hulland C and Ruegg P L (2013) Characterization of clinical mastitis occurring in cows on 50 large dairy herds in Wisconsin. Journal of Dairy Science 96 7538–7549.
- O'Neill L A, Kishton R J and Rathmell J (2016) A guide to immunometabolism for immunologists. Nature Reviews Immunology 16 553–565.
- Park H Y, Kunitake Y, Hirasaki N, Tanaka M and Matsui T (2015) Theaflavins enhance intestinal barrier of Caco-2 cell monolayers through the expression of AMP-activated protein kinase-mediated Occludin, Claudin-1, and ZO-1. Bioscience, Biotechnology, and Biochemistry 79 130–137.
- Pérez-Figueroa E, Álvarez-Carrasco P, Ortega E and Maldonado-Bernal C (2021) Neutrophils: Many ways to die. Frontiers in Immunology 12 631821.
- Petersson-Wolfe C S, Leslie K E and Swartz T H (2018) An update on the effect of clinical mastitis on the welfare of dairy cows and potential therapies. Veterinary Clinics of North America. Food Animal Practice 34 525–535.
- Plaizier J C, Danesh Mesgaran M, Derakhshani H, Golder H, Khafipour E, Kleen J L, Lean I, Loor J, Penner G and Zebeli Q (2018) Review: Enhancing gastrointestinal health in dairy cows. Animal 12 s399–s418.
- Plaizier J C, Mulligan F J, Neville E W, Guan L L, Steele M A and Penner G B (2022) Invited review: Effect of subacute ruminal acidosis on gut health of dairy cows. Journal of Dairy Science 105 7141–7160.
- Potrykus M, Czaja-Stolc S, Stankiewicz M, Kaska Ł and Małgorzewicz S (2021) Intestinal microbiota as a contributor to chronic inflammation and its potential modifications. Nutrients 13 3839.
- Qiu M, Feng L, Yu Z, Zhao C, Gao S, Bao L, Zhang N, Fu Y and Hu X (2022) Probiotic enterococcus mundtii H81 inhibits the NF-κB signaling pathway to ameliorate Staphylococcus aureus-induced mastitis in mice. Microbial Pathogenesis 164 105414.
- Rainard P (2017) Mammary microbiota of dairy ruminants: Fact or fiction? Veterinary Research 48 25.
- Rodríguez J M (2014) The origin of human milk bacteria: Is there a bacterial entero-mammary pathway during late pregnancy and lactation? Advances in Nutrition 5 779–784.
- Rodríguez J M, Fernández L and Verhasselt V (2021) The gut-breast Axis: Programming health for life. Nutrients 13 606.
- Rodríguez-Prados J C, Través P G, Cuenca J, Rico D, Aragonés J, Martín-Sanz P, Cascante M and Boscá L (2010) Substrate fate in activated macrophages: A comparison between innate, classic, and alternative activation. Journal of Immunology 185 605–614.
- Saito N, Nguyen H M and Inaoka T (2021) Impact of activation of neotrehalosadiamine/kanosamine biosynthetic pathway on the metabolism of Bacillus subtilis. Journal of Bacteriology 203 e00603–e00620.
- Seki E and Brenner D A (2008) Toll-like receptors and adaptor molecules in liver disease: Update. Hepatology 48 322–335.
- Shabat S K, Sasson G, Doron-Faigenboim A, Durman T, Yaacoby S, Berg Miller M E, White B A, Shterzer N and Mizrahi I (2016) Specific microbiome-dependent mechanisms underlie the energy harvest efficiency of ruminants. The ISME Journal 10 2958–2972.
- Shihab I, Khalil B A, Elemam N M, Hachim I Y, Hachim M Y, Hamoudi R A and Maghazachi A A (2020) Understanding the role of innate immune cells and identifying genes in breast cancer microenvironment. Cancers 12 2226.
- Singh S V, Ganguly R, Jaiswal K, Yadav A K, Kumar R and Pandey A K (2023) Molecular signalling during cross talk between gut brain axis regulation and progression of irritable bowel syndrome: A comprehensive review. World Journal of Clinical Cases 11 4458–4476.
- Sintes G F, Bruckmaier R M and Wellnitz O (2020) Nonsteroidal anti-inflammatory drugs affect the mammary epithelial barrier during inflammation. Journal of Dairy Science 103 10742–10753.
- Smith K L, Hogan J S and Weiss W P (1997) Dietary vitamin E and selenium affect mastitis and milk quality. Journal of Animal Science 75 1659–1665.
- Sordillo L M (2018) Symposium review: Oxylipids and the regulation of bovine mammary inflammatory responses. Journal of Dairy Science 101 5629–5641.
- Sun X, Luo S, Jiang C, Tang Y, Cao Z, Jia H, Xu Q, Zhao C, Loor J J and Xu C (2020) Sodium butyrate reduces bovine mammary epithelial cell inflammatory responses induced by exogenous lipopolysaccharide, by inactivating NF-κB signaling. Journal of Dairy Science 103 8388–8397.
- Tannahill G M, Curtis A M, Adamik J et al. (2013) Succinate is an inflammatory signal that induces IL-1β through HIF-1α. Nature 496 238–242.
- Tomlinson J E and Blikslager A T (2004) Interactions between lipopolysaccharide and the intestinal epithelium. Journal of the American Veterinary Medical Association 224 1446–1452.
- Ushio-Fukai M, Ash D, Nagarkoti S, Belin de Chantemèle E J, Fulton D J R and Fukai T (2021) Interplay between reactive oxygen/reactive nitrogen species and metabolism in vascular biology and disease. Antioxidants & Redox Signaling 34 1319–1354.
- Verstak B, Nagpal K, Bottomley S P, Golenbock D T, Hertzog P J and Mansell A (2009) MyD88 adapter-like (mal)/TIRAP interaction with TRAF6 is critical for TLR2- and TLR4-mediated NF-kappaB proinflammatory responses. Journal of Biological Chemistry 284 24192–24203.
- Wall S K, Hernández-Castellano L E, Ahmadpour A, Bruckmaier R M and Wellnitz O (2016) Differential glucocorticoid-induced closure of the blood-milk barrier during lipopolysaccharide- and lipoteichoic acid-induced mastitis in dairy cows. Journal of Dairy Science 99 7544–7553.
- Wallis J K, Krömker V and Paduch J H (2019) Biofilm challenge: Lactic acid bacteria isolated from bovine udders versus staphylococci. Food 8 79.
- Wang J J, Wei Z K, Zhang X, Wang Y N, Fu Y H and Yang Z T (2017a) Butyrate protects against disruption of the blood-milk barrier and moderates inflammatory responses in a model of mastitis induced by lipopolysaccharide. British Journal of Pharmacology 174 3811–3822.
- Wang J, Wei Z, Zhang X, Wang Y, Yang Z and Fu Y (2017b) Propionate protects against lipopolysaccharide-induced mastitis in mice by restoring blood-Milk barrier disruption and suppressing inflammatory response. Frontiers in Immunology 8 1108.
- Wang H, He C, Liu Y, Zhao H, Long L, Gai X and Zhao H (2020) Soluble dietary fiber protects intestinal mucosal barrier by improving intestinal flora in a murine model of sepsis. Biomedicine & Pharmacotherapy 129 110343.
- Wang Y, Nan X, Zhao Y et al. (2021a) Rumen microbiome structure and metabolites activity in dairy cows with clinical and subclinical mastitis. Journal of Animal Science and Biotechnology 12 36.
- Wang Y, Nan X, Zhao Y et al. (2021b) Dietary supplementation of inulin ameliorates subclinical mastitis via regulation of rumen microbial community and metabolites in dairy cows. Microbiology Spectrum 9 e0010521.
- Wei Z, Yao M, Li Y, He X and Yang Z (2014) Dietary selenium deficiency exacerbates lipopolysaccharide-induced inflammatory response in mouse mastitis models. Inflammation 37 1925–1931.
- Wellnitz O and Bruckmaier R M (2021) Invited review: The role of the blood-milk barrier and its manipulation for the efficacy of the mammary immune response and milk production. Journal of Dairy Science 104 6376–6388.
- Wilson D J, González R N, Hertl J, Schulte H F, Bennett G J, Schukken Y H and Gröhn Y T (2004) Effect of clinical mastitis on the lactation curve: A mixed model estimation using daily Milk weights. Journal of Dairy Science 87 2073–2084.
- Wu H, Nguyen Q D, Tran T T M, Tang M T, Tsuruta T and Nishino N (2019) Rumen fluid, feces, milk, water, feed, airborne dust, and bedding microbiota in dairy farms managed by automatic milking systems. Animal Science Journal 90 445–452.
- Xu H, Lin C, Li T et al. (2022) N(6)-methyladenosine-modified circRNA in the bovine mammary epithelial cells injured by Staphylococcus aureus and Escherichia coli. Frontiers in Immunology 13 873330.
- Young W, Hine B C, Wallace O A, Callaghan M and Bibiloni R (2015) Transfer of intestinal bacterial components to mammary secretions in the cow. Peer Journal 3 e888.
- Yu W, Wang Z, Zhang K et al. (2019) One-carbon metabolism supports S-adenosylmethionine and histone methylation to drive inflammatory macrophages. Molecular Cell 75 1147–1160.
- Zhang K, Chang G, Xu T, Xu L, Guo J, Jin D and Shen X (2016) Lipopolysaccharide derived from the digestive tract activates inflammatory gene expression and inhibits casein synthesis in the mammary glands of lactating dairy cows. Oncotarget 7 9652–9665.
- Zhang Y, Lu J, Yan Y, Liu J and Wang M (2021) Antibiotic residues in cattle and sheep meat and human exposure assessment in southern Xinjiang, China. Food Science & Nutrition 9 6152–6161.
- Zhang Y, Xu Y, Chen B, Zhao B and Gao X J (2022) Selenium deficiency promotes oxidative stress-induced mastitis via activating the NF-κB and MAPK pathways in dairy cow. Biological Trace Element Research 200 2716–2726.
- Zhao C, Bao L, Qiu M, Wu K, Zhao Y, Feng L, Xiang K, Zhang N, Hu X and Fu Y (2022a) Commensal cow Roseburia reduces gut-dysbiosis-induced mastitis through inhibiting bacterial translocation by producing butyrate in mice. Cell Reports 41 111681.
- Zhao C, Hu X, Bao L et al. (2022b) Gut dysbiosis induces the development of mastitis through a reduction in host anti-inflammatory enzyme activity by endotoxemia. Microbiome 10 205.
- Zhao C J, Hu X Y, Qiu M et al. (2023) Sialic acid exacerbates gut dysbiosis-associated mastitis through the microbiota-gut-mammary axis by fueling gut microbiota disruption. Microbiome 11 78.
- Zhong Y, Xue M Y, Sun H Z, Valencak T G, Guan L L and Liu J (2020) Rumen and hindgut bacteria are potential indicators for mastitis of mid-lactating Holstein dairy cows. Microorganisms 8 2042.