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Establishment and characterization of equine autonomic ganglion cell lines to enable direct testing of candidate toxins involved in equine dysautonomia (grass sickness)

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Abstract

To enable direct testing of a range of potential toxins or pathogens that might be involved in grass sickness, equine thoracic sympathetic chain ganglion cell lines were established from primary cell cultures by retroviral-mediated transduction of the temperature-sensitive mutant of the establishment oncogene encoding SV40 large T antigen. Morphological and behavioral features, temperature dependence, and immunocytochemical characteristics of the cell lines were investigated. The majority of cells were noradrenergic neurons in which dopamine-β-hydroxylase, the enzyme that catalyzes norepinephrine synthesis, and neuropeptide Y coexisted.

Cells treated with plasma from grass sickness cases that had previously been shown to induce autonomic nervous system damage when injected into normal horses showed significantly decreased mitochondrial function after 1 day. After 3 days exposure most cells showed severe degeneration in contrast to those treated with normal plasma. Liver and lung cell lines were also susceptible to plasma, suggesting that the toxin is not specifically neurotoxic.

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Authors
  1. H.A. John
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  2. A.J. Laffling
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  3. J. Marrs
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  4. A. Baird
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  5. P.S. Jat
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  6. N.B. Holdstock
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  7. P.D. Rossdale
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John, H., Laffling, A., Marrs, J. et al. Establishment and characterization of equine autonomic ganglion cell lines to enable direct testing of candidate toxins involved in equine dysautonomia (grass sickness). Cell Biol Toxicol 16, 63–74 (2000). https://doi.org/10.1023/A:1007648721564

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  • DOI: https://doi.org/10.1023/A:1007648721564

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