PMID- 35278630 OWN - NLM STAT- MEDLINE DCOM- 20220524 LR - 20230502 IS - 1872-9738 (Electronic) IS - 0892-0362 (Print) IS - 0892-0362 (Linking) VI - 91 DP - 2022 May-Jun TI - Impacts of a perinatal exposure to manganese coupled with maternal stress in rats: Tests of untrained behaviors. PG - 107088 LID - S0892-0362(22)00026-5 [pii] LID - 10.1016/j.ntt.2022.107088 [doi] AB - Manganese (Mn), an element that naturally occurs in the environment, has been shown to produce neurotoxic effects on the developing young when levels exceed physiological requirements. To evaluate the effects of this chemical in combination with non-chemical factors pregnant Long-Evans rats were treated with 0, 2, or 4 mg/mL Mn in their drinking water from gestational day (GD) 7 to postnatal day (PND) 22. Half of the dams received a variable stress protocol from GD13 to PND9, that included restraint, small cage with reduced bedding, exposure to predator odor, intermittent intervals of white noise, lights on for 24 h, intermittent intervals of lights on during dark cycle and cages with grid floors and reduced bedding. One male and one female offspring from each litter were tested to assess untrained behavior. Ultrasonic vocalizations (USV) were recorded from PND13 pups while they were isolated from the litter. Locomotor activity (MA) was measured in figure-eight mazes at PND 17, 29, and 79 (different set of rats at each time point). Social approach (SA) was tested at PND48. Acoustic startle response (ASR) and pre-pulse inhibition (PPI) were measured starting at PND58. At PND53 a sweetness preference for a chocolate flavored milk solution was assessed. There were sex related differences on several parameters for the USVs. There was also a Mn by stress by sex interaction with the females from the 4 mg/mL stressed dams having more frequency modulated (FM) call elements than the 4 mg/mL non-stressed group. There was an effect of Mn on motor activity but only at PND29 with the 2 mg/mL group having higher counts than the 0 mg/mL group. The social approach test showed sex differences for both the habituation and test phase. There was an effect of Mn, with the 4 mg/mL males having a greater preference for the stimulus rat than did the 0 mg/mL males. There was also a stress by sex interaction. The ASR and PPI had only a sex effect. Thus, with only the FM call elements having a Mn by stress effect, and the PND29 MA and SA preference index having a Mn effect but at different doses requires further investigation. CI - Published by Elsevier Inc. FAU - McDaniel, Katherine L AU - McDaniel KL AD - Neurological & Endocrine Toxicology Branch, Public Health & Integrated Toxicology Division, Center for Public Health and Environmental Assessment, Office of Research and Development, U.S. Environmental Protection Agency, Research Triangle Park, NC 27711, United States of America. Electronic address: mcdaniel.kathy@epa.gov. FAU - Beasley, Tracey E AU - Beasley TE AD - Neurological & Endocrine Toxicology Branch, Public Health & Integrated Toxicology Division, Center for Public Health and Environmental Assessment, Office of Research and Development, U.S. Environmental Protection Agency, Research Triangle Park, NC 27711, United States of America. FAU - Oshiro, Wendy M AU - Oshiro WM AD - Cardiopulmonary & Immunotoxicology Branch, Public Health & Integrated Toxicology Division, Center for Public Health and Environmental Assessment, Office of Research and Development, U.S. Environmental Protection Agency, Research Triangle Park, NC 27711, United States of America. FAU - Huffstickler, Mitchell AU - Huffstickler M AD - Public Health & Integrated Toxicology Division, Center for Public Health and Environmental Assessment, Office of Research and Development, U.S. Environmental Protection Agency, Research Triangle Park, NC 27711, United States of America; Oak Ridge Institute for Science Education, Oak Ridge, TN 37830, United States of America. FAU - Moser, Virginia C AU - Moser VC AD - Public Health & Integrated Toxicology Division, Center for Public Health and Environmental Assessment, Office of Research and Development, U.S. Environmental Protection Agency, Research Triangle Park, NC 27711, United States of America. FAU - Herr, David W AU - Herr DW AD - Neurological & Endocrine Toxicology Branch, Public Health & Integrated Toxicology Division, Center for Public Health and Environmental Assessment, Office of Research and Development, U.S. Environmental Protection Agency, Research Triangle Park, NC 27711, United States of America. LA - eng GR - EPA999999/ImEPA/Intramural EPA/United States PT - Journal Article DEP - 20220310 PL - United States TA - Neurotoxicol Teratol JT - Neurotoxicology and teratology JID - 8709538 RN - 42Z2K6ZL8P (Manganese) SB - IM MH - Animals MH - Behavior, Animal MH - Female MH - Humans MH - Male MH - *Manganese/toxicity MH - Pregnancy MH - *Prenatal Exposure Delayed Effects/chemically induced MH - Prepulse Inhibition MH - Rats MH - Rats, Long-Evans MH - Reflex, Startle PMC - PMC9133146 MID - NIHMS1798067 OTO - NOTNLM OT - Manganese (Mn) OT - Neurobehavioral tasks OT - Perinatal stress EDAT- 2022/03/13 06:00 MHDA- 2022/05/25 06:00 PMCR- 2023/05/01 CRDT- 2022/03/12 20:10 PHST- 2021/10/06 00:00 [received] PHST- 2022/03/01 00:00 [revised] PHST- 2022/03/06 00:00 [accepted] PHST- 2022/03/13 06:00 [pubmed] PHST- 2022/05/25 06:00 [medline] PHST- 2022/03/12 20:10 [entrez] PHST- 2023/05/01 00:00 [pmc-release] AID - S0892-0362(22)00026-5 [pii] AID - 10.1016/j.ntt.2022.107088 [doi] PST - ppublish SO - Neurotoxicol Teratol. 2022 May-Jun;91:107088. doi: 10.1016/j.ntt.2022.107088. Epub 2022 Mar 10.