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Deciphering the Link Between Polychlorinated Biphenyls, Immune Function and Exercise

Pillai, Mahesh Ramachandran
http://rave.ohiolink.edu/etdc/view?acc_num=bgsu1510140839084446

Abstract Details

2017, Doctor of Philosophy (Ph.D.), Bowling Green State University, Biological Sciences.
Polychlorinated biphenyls (PCBs) are environmental pollutants and endocrine disruptors, harmfully affecting reproductive, endocrine, neurological and immunological systems. This has implications for processes such as wound healing, which is modulated by the immunological response of the body. Conversely, while PCBs can be linked to diminished wound healing, outside of PCB pollution systems, exercise has been shown to accelerate wound healing. However, the potential for moderate intensity exercise to modulate or offset the harmful effects of a toxin like PCB are yet unknown. Exploration of this possible moderation on local immune response was achieved by measuring wound size and analyzing the concentrations of proinflammatory cytokines, interleukin-1ß (IL-1ß), interleukin-6 (IL-6), keratinocyte chemoattractant (KC), monocyte chemoattractant protein-1 (MCP-1), and tumor necrosis factor-a (TNF-a) in wounds (inflicted by punch biopsy) in mice that were not exercised as compared with those previously exercised at moderate intensity by running on a treadmill for 30min/day and then injected intraperitoneally with Aroclor 1254 (industrial mixture of PCB congeners) in doses of either 0, 100, 500 and 1000 ppm (wt/wt of mice). Mice were euthanized at Day 3 or Day 5 (n = 3-6) and skin excised from the wound area was homogenized and analyzed for cytokine content. Systemic effects of exercise on immune function in PCB exposed animals were examined by lipopolysaccharide (LPS) challenge (intraperitoneal injections) and analyzed by measuring the average body temperatures using a thermal imaging camera. Wound healing data revealed that in animals not exercised only the greatest dose of PCB (1000 µg/g) showed a pattern for faster wound healing. Exercise produced a pattern of more rapid wound healing rates compared to the animals administerd similar doses, except for animals administered 100 µg/g PCB. Concentrations of pro-inflammatory cytokines revealed patterns that could explain many of the changes observed in the wound healing rates and could be used as a good predictor of progression of wound healing. Average body temperature measurements revealed a febrinergic response to LPS stimulation only in the mice not exercised that were not administered PCB. In exercised mice this response was blunted, indicating lowered inflammatory response. Overall, exercise appears to have a beneficial effect on wound healing and LPS stimulation, only in animals not administered PCB. Recent studies show both PCB and exercise impair functioning of macrophages and that could have produced the similarity of results in the present study and needs to be further explored.
Lee Meserve, Dr. (Advisor)
Howard Cromwell, Dr. (Other)
Todd Keylock, Dr. (Committee Member)
Scott Rogers , Dr. (Committee Member)
Vipaporn Phuntumart, Dr. (Committee Member)
125 p.
Immunology; Kinesiology; Molecular Biology; Physiology; Toxicology
Polychlorinated Biphenyls; PCBs; Aroclor 1254; A1254; wound healing; cytokines; local immune response; systemic immune response; wound size; BioPlex assay; lipopolysaccharide; LPS; infrared camera; body temperature; macrophages; plasticity

Recommended Citations

Citations

  • Pillai, M. R. (2017). Deciphering the Link Between Polychlorinated Biphenyls, Immune Function and Exercise [Doctoral dissertation, Bowling Green State University]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=bgsu1510140839084446

    APA Style (7th edition)

  • Pillai, Mahesh. Deciphering the Link Between Polychlorinated Biphenyls, Immune Function and Exercise. 2017. Bowling Green State University, Doctoral dissertation. OhioLINK Electronic Theses and Dissertations Center, http://rave.ohiolink.edu/etdc/view?acc_num=bgsu1510140839084446.

    MLA Style (8th edition)

  • Pillai, Mahesh. "Deciphering the Link Between Polychlorinated Biphenyls, Immune Function and Exercise." Doctoral dissertation, Bowling Green State University, 2017. http://rave.ohiolink.edu/etdc/view?acc_num=bgsu1510140839084446

    Chicago Manual of Style (17th edition)

bgsu1510140839084446
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This open access ETD is published by Bowling Green State University and OhioLINK.