Cited by 92Sphingolipid Metabolism and SignalingAutophagy in Disease and TherapyT-cell and B-cell Immunology

Aging-dependent mitochondrial dysfunction mediated by ceramide signaling inhibits antitumor T cell response

Open access
Vaena, Silvia, Chakraborty, Paramita, Lee, Han Gyul, Janneh, Alhaji H., Kassir, Mohamed Faisal, Beeson, Gyda, Hedley, Zachariah, Yalcinkaya, Ahmet +7 more·2021·Cell Reports

Abstract

We lack a mechanistic understanding of aging-mediated changes in mitochondrial bioenergetics and lipid metabolism that affect T cell function. The bioactive sphingolipid ceramide, induced by aging stress, mediates mitophagy and cell death; however, the aging-related roles of ceramide metabolism in regulating T cell function remain unknown. Here, we show that activated T cells isolated from aging mice have elevated C14/C16 ceramide accumulation in mitochondria, generated by ceramide synthase 6, leading to mitophagy/mitochondrial dysfunction. Mechanistically, aging-dependent mitochondrial ceramide inhibits protein kinase A, leading to mitophagy in activated T cells. This aging/ceramide-dependent mitophagy attenuates the antitumor functions of T cells in vitro and in vivo. Also, inhibition of ceramide metabolism or PKA activation by genetic and pharmacologic means prevents mitophagy and restores the central memory phenotype in aging T cells. Thus, these studies help explain the mechanisms behind aging-related dysregulation of T cells' antitumor activity, which can be restored by inhibiting ceramide-dependent mitophagy.

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  1. Sliter DA, Martinez J, Hao L, Chen X, Sun N, Fischer TD, Burman JL, Li Y, Zhang Z, Narendra DP, (2018). Parkin and PINK1 mitigate STING-induced inflammation. Nature 561, 258– 262. 30135585 PMC7362342

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Authors
Vaena, S., Chakraborty, P., Lee, H. G., Janneh, A. H., Kassir, M. F., Beeson, G., Hedley, Z., Yalcinkaya, A., Sofi, M. H., Li, H., Husby, M. L., Stahelin, R. V., Yu, X.-Z., Mehrotra, S., & Ogretmen, B.
Affiliations
  • Medical University of South Carolina (US)
  • Purdue University West Lafayette (US)
Venue
Cell Reports
Publisher
Elsevier BV
Published
2021-05
Volume
35
Issue
5
Pages
109076
ISSN
2211-1247 (ISSN-L)
OpenAlex
W3157990394
Cited by
92
References
91
Citations by year
2026: 21 · 2025: 23 · 2024: 18 · 2023: 17 · 2022: 12 · 2021: 1
FWCI
3.77
Type
journal article
Language
en
Open access
Locations
  • Cell Reports (publishedVersion, cc-by-nc-nd)
  • PubMed (publishedVersion)
  • PubMed Central (acceptedVersion, cc-by-nc-nd)
  • DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion, cc-by-sa)
Funders
  • National Institutes of Health (P01 CA203628, DE016572, AG069769, C06 RR015455, CA214461-03S1)
  • Medical University of South Carolina
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Sphingolipid Metabolism and Signaling
  • Health Sciences › Medicine › Epidemiology › Autophagy in Disease and Therapy
  • Life Sciences › Immunology and Microbiology › Immunology › T-cell and B-cell Immunology
Keywords
aging, mitochondrial dysfunction, ceramide signaling, mitophagy, T cell function, antitumor immunity, ceramide synthase 6, protein kinase A, sphingolipids, central memory T cells, mitochondrial bioenergetics, lipid metabolism
MeSH terms
Aging, Animals, Ceramides, Humans, Mitochondria, T-Lymphocytes, Signal Transduction, Mice

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