Cited by 16Telomeres, Telomerase, and SenescenceInterstitial Lung Diseases and Idiopathic Pulmonary FibrosisGenetics, Aging, and Longevity in Model Organisms

Transcriptional and proteomic characterization of telomere-induced senescence in a human alveolar epithelial cell line

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Sullivan, Daniel I., Jiang, Mao, Hinchie, Angela M., Roth, Mark G., Bahudhanapati, Harinath, Nouraie, Mehdi, Liu, Jie, McDyer, John F. +5 more·2021·Frontiers in Medicine

Abstract

Cellular senescence due to telomere dysfunction has been hypothesized to play a role in age-associated diseases including idiopathic pulmonary fibrosis (IPF). It has been postulated that paracrine mediators originating from senescent alveolar epithelia signal to surrounding mesenchymal cells and contribute to disease pathogenesis. However, murine models of telomere-induced alveolar epithelial senescence fail to display the canonical senescence-associated secretory phenotype (SASP) that is observed in senescent human cells. In an effort to understand human-specific responses to telomere dysfunction, we modeled telomere dysfunction-induced senescence in a human alveolar epithelial cell line. We hypothesized that this system would enable us to probe for differences in transcriptional and proteomic senescence pathways in vitro and to identify novel secreted protein (secretome) changes that potentially contribute to the pathogenesis of IPF. Following induction of telomere dysfunction, a robust senescence phenotype was observed. RNA-seq analysis of the senescent cells revealed the SASP and comparisons to previous murine data highlighted differences in response to telomere dysfunction. We conducted a proteomic analysis of the senescent cells using a novel biotin ligase capable of labeling secreted proteins. Candidate biomarkers selected from our transcriptional and secretome data were then evaluated in IPF and control patient plasma. Four novel proteins were found to be differentially expressed between the patient groups: stanniocalcin-1, contactin-1, tenascin C, and total inhibin. Our data show that human telomere-induced, alveolar epithelial senescence results in a transcriptional SASP that is distinct from that seen in analogous murine cells. Our findings suggest that studies in animal models should be carefully validated given the possibility of species-specific responses to telomere dysfunction. We also describe a pragmatic approach for the study of the consequences of telomere-induced alveolar epithelial cell senescence in humans.

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  • Multiplexed antibody-based imaging technologies such as imaging mass cytometry and CODEX can detect 20-50 selected genes simultaneously in each cell at the protein level, complementing transcript-based detection especially given the potential for poor correlation of transcriptomic and proteomic data sets in senescent cells.

    “For example, multiplexed antibody-based imaging (mABI) technologies such as imaging mass cytometry (IMC) [31] and codetection by indexing (CODEX) [32] can detect 20–50 selected genes simultaneously in each cell at the protein level, which is a useful complement to transcript-based detection – especially given the potential for poor correlation of transcriptomic and proteomic data sets implicated”

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Authors
Sullivan, D. I., Jiang, M., Hinchie, A. M., Roth, M. G., Bahudhanapati, H., Nouraie, M., Liu, J., McDyer, J. F., Mallampalli, R. K., Zhang, Y., Kass, D. J., Finkel, T., & Alder, J. K.
Affiliations
  • University of Pittsburgh (US)
  • Central South University (CN)
  • The Ohio State University (US)
Corresponding author
Alder, Jonathan K.
Venue
Frontiers in Medicine
Published
2021-02-09
Volume
8
Pages
600626-600626
ISSN
2296-858X (ISSN-L)
OpenAlex
W3128360456
Cited by
16
References
59
Citations by year
2026: 5 · 2025: 3 · 2022: 7 · 2021: 1
FWCI
1.26
Type
journal article
Language
en
Open access
Locations
  • Frontiers in Medicine (publishedVersion, cc-by)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
  • DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion)
Funders
National Heart, Lung, and Blood Institute
Topics
  • Health Sciences › Medicine › Physiology › Telomeres, Telomerase, and Senescence
  • Health Sciences › Medicine › Pulmonary and Respiratory Medicine › Interstitial Lung Diseases and Idiopathic Pulmonary Fibrosis
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Aging › Genetics, Aging, and Longevity in Model Organisms
Keywords
telomere dysfunction, cellular senescence, alveolar epithelial cells, idiopathic pulmonary fibrosis, senescence-associated secretory phenotype, secretome, senescence biomarkers, stanniocalcin-1, contactin-1, tenascin-C, inhibin, paracrine signaling

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