PMID- 20200219 OWN - NLM STAT- MEDLINE DCOM- 20100810 LR - 20220309 IS - 1096-0929 (Electronic) IS - 1096-6080 (Print) IS - 1096-0929 (Linking) VI - 115 IP - 2 DP - 2010 Jun TI - Nickel sulfate induces location-dependent atrophy of mouse olfactory epithelium: protective and proliferative role of purinergic receptor activation. PG - 547-56 LID - 10.1093/toxsci/kfq071 [doi] AB - Exposure to nickel sulfate (NiSO(4)) leads to impaired olfaction and anosmia through an unknown mechanism. We tested the hypothesis that ATP is released following NiSO4-induced injury and that ATP promotes regenerative cell proliferation in the olfactory epithelium (OE). Male Swiss Webster mice were intranasally instilled with NiSO(4) or saline followed by ATP, purinergic receptor antagonists, or saline. We assessed the olfactory epithelium for NiSO(4)-induced changes using histology and immunohistochemistry 1-7 days postinstillation and compared results to olfactory bulb ablation-induced toxicity. Intranasal instillation of NiSO(4) produced a dose- and time-dependent reduction in the thickness of turbinate OE. These reductions were due to sustentacular cell loss, measured by terminal dUTP nick-end labeling (TUNEL) staining at 1-day postinstillation and caspase-3-dependent apoptosis of olfactory sensory neurons at 3 days postinstillation. A significant increase in cell proliferation was observed at 5 and 7 days postinstillation of NiSO(4) evidenced by BrdU incorporation. Treatment with purinergic receptor antagonists significantly reduced NiSO(4)-induced cell proliferation and posttreatment with ATP significantly increased cell proliferation. Furthermore, posttreatment with ATP had no effect on sustentacular cell viability but significantly reduced caspase-3-dependent neuronal apoptosis. In a bulbectomy-induced model of apoptosis, exogenous ATP produced a significant increase in cell proliferation that was not affected by purinergic receptor antagonists, suggesting that ATP is not released during bulbectomy-induced apoptosis. ATP is released following NiSO(4)-induced apoptosis and has neuroproliferative and neuroprotective functions. These data provide therapeutic strategies to alleviate or cure the loss of olfactory function associated with exposure to nickel compounds. FAU - Jia, Cuihong AU - Jia C AD - Department of Pharmacology and Toxicology, Michigan State University, East Lansing, Michigan 48824, USA. FAU - Roman, Carlos AU - Roman C FAU - Hegg, Colleen C AU - Hegg CC LA - eng GR - R01 DC006897/DC/NIDCD NIH HHS/United States GR - 1R25NS065777/NS/NINDS NIH HHS/United States GR - DC006897/DC/NIDCD NIH HHS/United States PT - Journal Article PT - Research Support, N.I.H., Extramural PT - Research Support, Non-U.S. Gov't DEP - 20100303 PL - United States TA - Toxicol Sci JT - Toxicological sciences : an official journal of the Society of Toxicology JID - 9805461 RN - 0 (Purinergic Antagonists) RN - 0 (Receptors, Purinergic) RN - 149017-66-3 (pyridoxal phosphate-6-azophenyl-2',4'-disulfonic acid) RN - 4FLT4T3WUN (nickel sulfate) RN - 5V5IOJ8338 (Pyridoxal Phosphate) RN - 6032D45BEM (Suramin) RN - 7OV03QG267 (Nickel) RN - 8L70Q75FXE (Adenosine Triphosphate) SB - IM MH - Adenosine Triphosphate/metabolism/*pharmacology MH - Animals MH - Apoptosis/drug effects MH - Atrophy/chemically induced/pathology MH - Cell Proliferation/drug effects MH - Cell Survival/drug effects MH - Drug Therapy, Combination MH - Male MH - Mice MH - Nickel/*toxicity MH - Olfactory Bulb/drug effects/pathology/surgery MH - Olfactory Mucosa/*drug effects/pathology MH - Purinergic Antagonists MH - Pyridoxal Phosphate/analogs & derivatives/pharmacology MH - Receptors, Purinergic/*metabolism MH - Suramin/pharmacology MH - Turbinates/drug effects/pathology PMC - PMC2871758 EDAT- 2010/03/05 06:00 MHDA- 2010/08/11 06:00 PMCR- 2011/06/01 CRDT- 2010/03/05 06:00 PHST- 2010/03/05 06:00 [entrez] PHST- 2010/03/05 06:00 [pubmed] PHST- 2010/08/11 06:00 [medline] PHST- 2011/06/01 00:00 [pmc-release] AID - kfq071 [pii] AID - 10.1093/toxsci/kfq071 [doi] PST - ppublish SO - Toxicol Sci. 2010 Jun;115(2):547-56. doi: 10.1093/toxsci/kfq071. Epub 2010 Mar 3.