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Prenatal immune challenge in rats: altered responses to dopaminergic and glutamatergic agents, prepulse inhibition of acoustic startle, and reduced route-based learning as a function of maternal body weight gain after prenatal exposure to poly IC.
Synapse. 2012 Aug; 66(8):725-37.S

Abstract

Prenatal maternal immune activation has been used to test the neurodevelopmental hypothesis of schizophrenia. Most of the data are in mouse models; far less is available for rats. We previously showed that maternal weight change in response to the immune activator polyinosinic-polycytidylic acid (Poly IC) in rats differentially affects offspring. Therefore, we treated gravid Harlan Sprague-Dawley rats i.p. on embryonic day 14 with 8 mg/kg of Poly IC or Saline. The Poly IC group was divided into those that lost or gained the least weight, Poly IC (L), versus those that gained the most weight, Poly IC (H), following treatment. The study design controlled for litter size, litter sampling, sex distribution, and test experience. We found no effects of Poly IC on elevated zero maze, open-field activity, object burying, light-dark test, straight channel swimming, Morris water maze spatial acquisition, reversal, or shift navigation or spatial working or reference memory, or conditioned contextual or cued fear or latent inhibition. The Poly IC (H) group showed a significant decrease in the rate of route-based learning when visible cues were unavailable in the Cincinnati water maze and reduced prepulse inhibition of acoustic startle in females, but not males. The Poly IC (L) group exhibited altered responses to acute pharmacological challenges: exaggerated hyperactivity in response to (+)-amphetamine and an attenuated hyperactivity in response to MK-801. This model did not exhibit the cognitive, or latent inhibition deficits reported in Poly IC-treated rats but showed changes in response to drugs acting on neurotransmitter systems implicated in the pathophysiology of schizophrenia (dopaminergic hyperfunction and glutamatergic hypofunction).

Authors+Show Affiliations

Division of Neurology, Cincinnati Children's Research Foundation, Cincinnati, Ohio 45229, USA. charles.vorhees@cchmc.orgNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article
Research Support, N.I.H., Extramural
Research Support, U.S. Gov't, Non-P.H.S.

Language

eng

PubMed ID

22473973

Citation

Vorhees, Charles V., et al. "Prenatal Immune Challenge in Rats: Altered Responses to Dopaminergic and Glutamatergic Agents, Prepulse Inhibition of Acoustic Startle, and Reduced Route-based Learning as a Function of Maternal Body Weight Gain After Prenatal Exposure to Poly IC." Synapse (New York, N.Y.), vol. 66, no. 8, 2012, pp. 725-37.
Vorhees CV, Graham DL, Braun AA, et al. Prenatal immune challenge in rats: altered responses to dopaminergic and glutamatergic agents, prepulse inhibition of acoustic startle, and reduced route-based learning as a function of maternal body weight gain after prenatal exposure to poly IC. Synapse. 2012;66(8):725-37.
Vorhees, C. V., Graham, D. L., Braun, A. A., Schaefer, T. L., Skelton, M. R., Richtand, N. M., & Williams, M. T. (2012). Prenatal immune challenge in rats: altered responses to dopaminergic and glutamatergic agents, prepulse inhibition of acoustic startle, and reduced route-based learning as a function of maternal body weight gain after prenatal exposure to poly IC. Synapse (New York, N.Y.), 66(8), 725-37. https://doi.org/10.1002/syn.21561
Vorhees CV, et al. Prenatal Immune Challenge in Rats: Altered Responses to Dopaminergic and Glutamatergic Agents, Prepulse Inhibition of Acoustic Startle, and Reduced Route-based Learning as a Function of Maternal Body Weight Gain After Prenatal Exposure to Poly IC. Synapse. 2012;66(8):725-37. PubMed PMID: 22473973.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Prenatal immune challenge in rats: altered responses to dopaminergic and glutamatergic agents, prepulse inhibition of acoustic startle, and reduced route-based learning as a function of maternal body weight gain after prenatal exposure to poly IC. AU - Vorhees,Charles V, AU - Graham,Devon L, AU - Braun,Amanda A, AU - Schaefer,Tori L, AU - Skelton,Matthew R, AU - Richtand,Neil M, AU - Williams,Michael T, Y1 - 2012/05/15/ PY - 2011/12/29/received PY - 2012/03/26/revised PY - 2012/03/27/accepted PY - 2012/4/5/entrez PY - 2012/4/5/pubmed PY - 2012/11/10/medline SP - 725 EP - 37 JF - Synapse (New York, N.Y.) JO - Synapse VL - 66 IS - 8 N2 - Prenatal maternal immune activation has been used to test the neurodevelopmental hypothesis of schizophrenia. Most of the data are in mouse models; far less is available for rats. We previously showed that maternal weight change in response to the immune activator polyinosinic-polycytidylic acid (Poly IC) in rats differentially affects offspring. Therefore, we treated gravid Harlan Sprague-Dawley rats i.p. on embryonic day 14 with 8 mg/kg of Poly IC or Saline. The Poly IC group was divided into those that lost or gained the least weight, Poly IC (L), versus those that gained the most weight, Poly IC (H), following treatment. The study design controlled for litter size, litter sampling, sex distribution, and test experience. We found no effects of Poly IC on elevated zero maze, open-field activity, object burying, light-dark test, straight channel swimming, Morris water maze spatial acquisition, reversal, or shift navigation or spatial working or reference memory, or conditioned contextual or cued fear or latent inhibition. The Poly IC (H) group showed a significant decrease in the rate of route-based learning when visible cues were unavailable in the Cincinnati water maze and reduced prepulse inhibition of acoustic startle in females, but not males. The Poly IC (L) group exhibited altered responses to acute pharmacological challenges: exaggerated hyperactivity in response to (+)-amphetamine and an attenuated hyperactivity in response to MK-801. This model did not exhibit the cognitive, or latent inhibition deficits reported in Poly IC-treated rats but showed changes in response to drugs acting on neurotransmitter systems implicated in the pathophysiology of schizophrenia (dopaminergic hyperfunction and glutamatergic hypofunction). SN - 1098-2396 UR - https://www.unboundmedicine.com/medline/citation/22473973/Prenatal_immune_challenge_in_rats:_altered_responses_to_dopaminergic_and_glutamatergic_agents_prepulse_inhibition_of_acoustic_startle_and_reduced_route_based_learning_as_a_function_of_maternal_body_weight_gain_after_prenatal_exposure_to_poly_IC_ L2 - https://doi.org/10.1002/syn.21561 DB - PRIME DP - Unbound Medicine ER -