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Gut Microbial Metabolites Fuel Host Antibody Responses
Open accessAbstract
Antibody production is a metabolically demanding process that is regulated by gut microbiota, but the microbial products supporting B cell responses remain incompletely identified. We report that short-chain fatty acids (SCFAs), produced by gut microbiota as fermentation products of dietary fiber, support host antibody responses. In B cells, SCFAs increase acetyl-CoA and regulate metabolic sensors to increase oxidative phosphorylation, glycolysis, and fatty acid synthesis, which produce energy and building blocks supporting antibody production. In parallel, SCFAs control gene expression to express molecules necessary for plasma B cell differentiation. Mice with low SCFA production due to reduced dietary fiber consumption or microbial insufficiency are defective in homeostatic and pathogen-specific antibody responses, resulting in greater pathogen susceptibility. However, SCFA or dietary fiber intake restores this immune deficiency. This B cell-helping function of SCFAs is detected from the intestines to systemic tissues and conserved among mouse and human B cells, highlighting its importance.
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“Since microbial metabolites can be utilized by T cells for their metabolic demand to enhance glycolysis and oxidative phosphorylation28,29”
From Microbial short-chain fatty acids modulate CD8+ T cell responses and improve adoptive immunotherapy for cancer (2021) · cites this paper as [28]
In the citing paper
“Intriguingly, they further found that SCFAs in parallel modulate the energy metabolism of B cells to promote production of antibodies (M. Kim et al., 2016).”
From Understanding the Holobiont: How Microbial Metabolites Affect Human Health and Shape the Immune System (2017) · cites this paper as M. Kim et al., 2016
In the citing paper
“Kim et al. shed further light on this observation and demonstrated that SCFAs support antibody responses by regulating gene expression through HDAC inhibition.”
From Understanding the Holobiont: How Microbial Metabolites Affect Human Health and Shape the Immune System (2017) · cites this paper as M. Kim et al., 2016
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BackgroundInfluentialThe Microbial Metabolites, Short-Chain Fatty Acids, Regulate Colonic T reg Cell Homeostasis
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“Moreover, SCFAs enhanced the mitochondrial ATP production and maximal respiration rates in B cells (Figure 4C).”
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“Foundational studies shows that SCFAs can enhance B-cell metabolic activity and support antibody responses be increasing acetyl-CoA availability and broader metabolic remodeling [17].”
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Aoyagi, Y., Amamoto, R., Park, S., Shimamoto, K., Suwa, T., Makino, H., & Matsubara, S. (2026) · The journal of nutrition health & aging · doi:10.1016/j.jnha.2026.100956
Fighting the invader: strategies against intracellular bacteria
Lorente-Torres, B., Castañera, P., Llano-Verdeja, J., Ferrero, H. Á., Fernández-Martínez, S., Javadimarand, F., Mateos, L. M., Mourenza, Á., & Letek, M. (2026) · Frontiers in Pharmacology · doi:10.3389/fphar.2026.1904697
“…benefits that must be weighed against possible effects on cancer and other host processes (Loonen et al., 2014; Atarashi et al., 2011; Atarashi et al., 2013; Frosali et al., 2015; Bhaskaran et al., 2018; Cao et al., 2012; Yang et al., 2020; Kim et al., 2016; Moor et al., 2017; Hill et al., 2014).”
Short-Chain Fatty Acids at the Crossroads of Microbiota, Immunometabolism, and Inflammation
Rolek, Ł., Sowa, A., Czosnek, M., Grywalska, E., Mertowska, P., & Mertowski, S. (2026) · Biomedicines · doi:10.3390/biomedicines14091967
“In activated B cells and plasma cells, increased lipid biosynthesis contributes to endoplasmic reticulum expansion required for high-rate immunoglobulin synthesis; however, the extent to which SCFAs directly control this process remains dependent on the experimental context Figure 8 [94].”
Interplay of gut microbiota, immune cells and natural products in reshaping cancer immunotherapy
Wu, X., Lu, L., Li, T., Zhao, L., Wang, L., Yao, Y., Chen, J., Liu, T., Li, X., Zhu, X., et al. (2026) · Frontiers in Microbiology · doi:10.3389/fmicb.2026.1898063
Ayvazyan, S. R., Darvina, O. V., Turkadze, K. A., Gerasimov, S. G., & Николаевна, К. Н. (2026) · Frontiers in Immunology · doi:10.3389/fimmu.2026.1917541 · Cited by 1
“…mitochondrial function and activation of the Akt – mTOR pathway, thus enhancing the generation of CD138 + PCs. SCFAs have been shown to favor host antibody production and improve both intestinal IgA and systemic IgG through improvement of mitochondrial quality and fatty acid oxidation (FAO) (287).”
Shakri, A. R., Mishra, S. P., Lawless, S., Pani, S., Mishra, P., Page, C. L., Dutta, G., & Sharma, C. (2026) · Vaccines · doi:10.3390/vaccines14090791
“Although it is still debated whether the fetus itself becomes colonized, products and metabolites from the mother’s microbes can reach the fetal compartment and affect immune systems that are still developing [50,51].”
Rivera-Ruiz, D. A., Flores‐Martínez, J. J., Rosales, C., Falcón, L. I., Gaona, O., la Cruz, M. T. S.-D., & M., L. G. H. (2026) · Microbial Ecology · doi:10.1007/s00248-026-02881-5
Translating gut microbiome research into therapies for type 1 diabetes
Kok, S. P., Nieuwdorp, M., & Rampanelli, E. (2026) · Experimental Physiology · doi:10.1113/ep093273 · Cited by 1
“Finally, SCFAs have been shown to enhance IgA-mediated mucosal immunity (Kim et al., 2016) and induce B cell differentiation into IL-10-producing regulatory B (Breg) cells (Daïen et al., 2021).”
Chen, X., Xie, X., Shi, X., Gao, X., Ye, H., Zhang, R., & Chen, Y. (2026) · Open Medicine · doi:10.1515/med-2026-1483
“Concurrently, butyrate improves the intestinal barrier through upregulation of tight junction proteins (e.g., Claudin-1, Occludin) and mucin MUC2 expression, which could limits milk protein antigen penetration and alleviates clinical symptoms [13, 14].”
Farah, H., Kubaev, A., Hanumanthayya, M., Al-Hussein, M. A., Mutee, A. F., Axmedova, F., Бекзод, Б. Э., & Shefali (2026) · Frontiers in Microbiology · doi:10.3389/fmicb.2026.1955829
“In a study, Kim et al. (2016) assessed this discovery further, demonstrating that SCFAs boost antibody responses by modulating gene expression via HDAC inhibition.”
Wang, X., Pan, W., Huang, J., Zhou, Y., Nalinratana, N., Rojsitthisak, P., Lin, Y., & Zhao, K. (2026) · Cell Reports · doi:10.1016/j.celrep.2026.118038
Hu, Y.-X., Chen, Z.-X., Luo, D., Tang, Z.-Q., Jiang, S.-Y., Pan, J.-B., Zhao, Y.-Z., Wang, J.-L., & Pan, Y.-X. (2026) · Foods · doi:10.3390/foods15193446
“In other models, probiotics have been reported to increase local intestinal immunoglobulin A (IgA) levels through SCFA production [135].”
Gut Microbiota–Mucosal Immune Interactions Underlying Intestinal Homeostasis in Weaned Piglets
Qin, J., Li, T., Li, X., Han, P., Jin, M., & Qiao, L. (2026) · Animals · doi:10.3390/ani16193075
“Microbial metabolites can also regulate this response [93].”
Sun, G., Yang, J., Lv, S., Yu, L., & Si, L. (2026) · Frontiers in Immunology · doi:10.3389/fimmu.2026.1972642
“SCFAs have substantial preclinical mechanistic support, but the molecules differ and direct human vaccine mediation remains unestablished.”
InfluentialMyrrha, A., Vieira, D. A., Blaudt-Meira, A., Carvalho, C. C., Vizzoni, L. H., Rocha, L. A., Rivelo, I. D. S., Moreira, P. H. C., Ferreira, B. X., Chagas-Sena, M., et al. (2026) · IntechOpen eBooks · doi:10.5772/intechopen.1017915
Gut Microbiota-Induced Metabolic Reprogramming of the Host Immune System
Roy, S. (2026) · Springer eBooks · doi:10.1007/978-3-032-30306-6_7
The Gut–Liver IgA Axis in Liver Disease: From Mucosal Immunity to Hepatic Inflammation and Cancer
Cho, S. W., Lee, G. W., & Sung, P. S. (2026) · Cells · doi:10.3390/cells15211933
Mapping the Evolution of Vaccine–Microbiome Research: A 30-Year Bibliometric Analysis (1995–2025)
Gao, B., Li, Y., Liu, Y., Sun, W., Qin, X., Shen, Q., Wang, S., & Gong, W. (2026) · Vaccines · doi:10.3390/vaccines14110922
Metadata
- Authors
- Kim, M., Qie, Y., Park, J., & Kim, C. H.
- Affiliations
- Purdue University West Lafayette (US)
- Corresponding author
- Kim, Chang H.
- Venue
- Cell Host & Microbe
- Publisher
- Elsevier BV
- Published
- 2016-08
- Volume
- 20
- Issue
- 2
- Pages
- 202-214
- ISSN
- 1931-3128 (ISSN-L)
- PMC
- PMC4982788
- OpenAlex
- W2491805933
- Cited by
- 893
- References
- 59
- Citations by year
- 2026: 92 · 2025: 129 · 2024: 110 · 2023: 110 · 2022: 107 · 2021: 106 · 2020: 90 · 2019: 61 · 2018: 47 · 2017: 32 · 2016: 8
- FWCI
- 25.63
- Type
- journal article
- Language
- en
- Open access
- bronze
- doi.org
- Licence
- Locations
- Cell Host & Microbe (publishedVersion)
- PubMed (publishedVersion)
- PubMed Central (acceptedVersion)
- Seoul National University Open Repository (Seoul National University) (submittedVersion)
- Funders
- National Multiple Sclerosis Society
- Purdue University Center for Cancer Research
- National Institutes of Health
- National Cancer Institute (P30CA023168)
- National Institute of Allergy and Infectious Diseases (R01AI121302, R01AI080769, R01AI074745)
- National Institute of Diabetes and Digestive and Kidney Diseases (R01DK076616)
- National Center for Research Resources (S10RR028293)
- Topics
- Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Gut microbiota and health
- Life Sciences › Immunology and Microbiology › Immunology › T-cell and B-cell Immunology
- Health Sciences › Nursing › Nutrition and Dietetics › Microbial Metabolites in Food Biotechnology
- Keywords
- short-chain fatty acids, gut microbiota, antibody production, B cells, dietary fiber, acetyl-CoA, oxidative phosphorylation, glycolysis, fatty acid synthesis, plasma cell differentiation, immunodeficiency, microbial metabolites
- MeSH terms
- Gastrointestinal Microbiome, Animals, Antibody Formation, B-Lymphocytes, Cell Differentiation, Dietary Fiber, Fatty Acids, Volatile, Fermentation, Gene Expression Regulation, Mice, Inbred C57BL, Gastrointestinal Tract, Metabolic Networks and Pathways
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