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PloS one2023; 18(9); e0290778; doi: 10.1371/journal.pone.0290778

Comparison of the broncoalveolar lavage fluid proteomics between foals and adult horses.

Abstract: Neonates have different cellular composition in their bronchoalveolar lavage fluid (BALF) when compared to foals and adult horses; however, little is known about the non-cellular components of BALF. The objective of this study was to determine the proteomic composition of BALF in neonatal horses and to compare it to that of foals and adult horses. Bronchoalveolar lavage fluid samples of seven neonates (< 1 week age), four 5 to 7-week-old foals, and six adult horses were collected. Quantitative proteomics of the fluid was performed using tandem mass tag labeling followed by high resolution liquid chromatography tandem mass spectrometry and protein relative abundances were compared between groups using exact text. A total of 704 proteins were identified with gene ontology terms and were classified. Of these, 332 proteins were related to the immune system in neonates, foals, and adult horses. The most frequent molecular functions identified were binding and catalytic activity and the most common biological processes were cellular process, metabolic process, and biological regulation. There was a significant difference in the proteome of neonates when compared to foals and to adult horses. Neonates had less relative expression (FDR < 0.01) of many immune-related proteins, including immunoglobulins, proteins involved in the complement cascade, ferritin, BPI fold-containing family B member 1, and macrophage receptor MARCO. This is the first report of equine neonate BALF proteomics and reveals differential abundance of proteins when compared to BALF from adult horses. The lower relative abundance of immune-related proteins in neonates could contribute to their susceptibility to pulmonary infections.
Publication Date: 2023-09-05 PubMed ID: 37669266PubMed Central: PMC10479908DOI: 10.1371/journal.pone.0290778Google Scholar: Lookup
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  • Journal Article
  • Research Support
  • Non-U.S. Gov't
  • Research Support
  • N.I.H.
  • Extramural

Summary

This research summary has been generated with artificial intelligence and may contain errors and omissions. Refer to the original study to confirm details provided. Submit correction.

The research article is about a comparative study of the proteomic content of bronchoalveolar lavage fluid (BALF) between neonate horses, foals and adult horses. Significant differences in the proteomic composition were found between the groups with lower levels of immune-related proteins in neonates.

Objective of the Research

  • The main goal of this research was to determine the proteomic composition of BALF in newborn horses and compare it with foals (5 to 7-week-old) and adult horses.
  • This is driven by the recognition that while there are established differences in the cellular composition of BALF between different age groups, the non-cellular components, such as proteins, are not well understood.

Methodology

  • The researchers collected BALF samples from seven neonates (< 1 week old), four foals and six adult horses.
  • The proteomics of the fluid were quantified using tandem mass tag labeling, liquid chromatography tandem mass spectrometry, and relative abundances of proteins were compared using the exact test method.

Findings and Interpretation

  • The analysis identified 704 proteins, which were classified according to their gene ontology terms. Among these, 332 proteins were related to the immune system.
  • The predominant molecular functions identified were binding and catalytic activity and the most recurrent biological processes were cellular process, metabolic process, and biological regulation.
  • It was observed that the proteome of neonates was significantly different from that of both foals and adult horses. Notably, neonates expressed many immune-related proteins such as immunoglobulins, proteins involved in the complement cascade, ferritin, BPI fold-containing family B member 1, and macrophage receptor MARCO at a much lower level compared to the foals and adult horses.

Significance and Implications

  • This study is the first to report on equine neonate BALF proteomics and reveals a significant difference in protein abundance compared to BALF from adult horses.
  • The research is meaningful as it points out that the lower relative abundance of immune-related proteins in neonates could contribute to their susceptibility to pulmonary infections. This could inform targeted interventions in healthcare and management of neonate horses.

Cite This Article

APA
Rivolta AA, Bujold AR, Wilmarth PA, Phinney BS, Navelski JP, Horohov DW, Sanz MG. (2023). Comparison of the broncoalveolar lavage fluid proteomics between foals and adult horses. PLoS One, 18(9), e0290778. https://doi.org/10.1371/journal.pone.0290778

Publication

ISSN: 1932-6203
NlmUniqueID: 101285081
Country: United States
Language: English
Volume: 18
Issue: 9
Pages: e0290778
PII: e0290778

Researcher Affiliations

Rivolta, Alejandra A
  • Department of Veterinary Clinical Sciences, College of Veterinary Medicine, Washington State University, Pullman, Washington, United States of America.
Bujold, Adina R
  • Department of Veterinary Clinical Sciences, College of Veterinary Medicine, Washington State University, Pullman, Washington, United States of America.
  • Department of Pathobiology, University of Guelph, Guelph, Ontario, Canada.
Wilmarth, Phillip A
  • Proteomic Shared Resource, Oregon Health & Science University, Portland, Oregon, United States of America.
Phinney, Brett S
  • Genome Center Proteomics Core Facility, UC Davis, Davis, California, United States of America.
Navelski, Joseph P
  • School of Economic Sciences, Washington State University, Pullman, Washington, United States of America.
Horohov, David W
  • Gluck Equine Research Center, University of Kentucky, Lexington, Kentucky, United States of America.
Sanz, Macarena G
  • Department of Veterinary Clinical Sciences, College of Veterinary Medicine, Washington State University, Pullman, Washington, United States of America.

MeSH Terms

  • Horses
  • Animals
  • Proteomics
  • Therapeutic Irrigation
  • Body Fluids
  • Bronchoalveolar Lavage Fluid
  • Chromatography, Liquid

Grant Funding

  • P30 EY010572 / NEI NIH HHS
  • P30 CA069533 / NCI NIH HHS

Conflict of Interest Statement

The authors have declared that no competing interests exist.

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