Darin Knapp

Dr. Darin Knapp


Research Focus & Metrics

Academic Career Length

30Years (1997-Present)

(Calculated once Scilit publication data is synced: current year − year of first publication + 1)

Representative Publications

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1 June 2011 in Brain, Behavior, and Immunity
Verified
Journal Article
Closed access
DKDarin Knapp
Darin Knapp
BWBuddy A. Whitman
Buddy A. Whitman
TWTiffany A. Wills
Tiffany A. Wills
RARobert A. Angel
Robert A. Angel
DODavid H. Overstreet
David H. Overstreet
GBGeorge R. Breese
George R. Breese

19 February 2009 in Alcohol, Clinical and Experimental Research
Verified
Journal Article
Closed access
PDF file
TWTiffany A. Wills
Tiffany A. Wills
DKDarin Knapp
Darin Knapp
DODavid H. Overstreet
David H. Overstreet
GBGeorge R. Breese
George R. Breese

1 March 2013 in Neurotoxicology and Teratology
Verified
Journal Article
Closed access
SMSheryl S. Moy
Sheryl S. Moy
RNRandal J. Nonneman
Randal J. Nonneman
GSGeoffrey O. Shafer
Geoffrey O. Shafer
VNViktoriya D. Nikolova
Viktoriya D. Nikolova
NRNatallia V. Riddick
Natallia V. Riddick
DKDarin Knapp
Darin Knapp

27 July 2016 in Brain Sciences
Verified
Journal Article
Open access
PDF file
DKDarin Knapp
Darin Knapp
KHKathryn Harper
Kathryn Harper
BWBuddy A. Whitman
Buddy A. Whitman
ZZZachary Zimomra
Zachary Zimomra
GBGeorge R. Breese
George R. Breese
Stress is a strong risk factor in alcoholic relapse and may exert effects that mimic aspects of chronic alcohol exposure on neurobiological systems. With the neuroimmune system becoming a prominent focus in the study of the neurobiological consequences of stress, as well as chronic alcohol exposure proving to be a valuable focus in this regard, the present study sought to compare the effects of stress and chronic ethanol exposure on induction of components of the neuroimmune system. Rats were exposed to either 1 h exposure to a mild stressor (restraint) or exposure to withdrawal from 15 days of chronic alcohol exposure (i.e., withdrawal from chronic ethanol, WCE) and assessed for neuroimmune mRNAs in brain. Restraint stress alone elevated chemokine (C–C motif) ligand 2 (CCL2), interleukin-1-beta (IL-1β), tumor necrosis factor alpha (TNFα) and toll-like receptor 4 (TLR4) mRNAs in the cerebral cortex within 4 h with a return to a control level by 24 h. These increases were not accompanied by an increase in corresponding proteins. Withdrawal from WCE also elevated cytokines, but did so to varying degrees across different cytokines and brain regions. In the cortex, stress and WCE induced CCL2, TNFα, IL-1β, and TLR4 mRNAs. In the hypothalamus, only WCE induced cytokines (CCL2 and IL-1β) while in the hippocampus, WCE strongly induced CCL2 while stress and WCE induced IL-1β. In the amygdala, only WCE induced CCL2. Finally—based on the previously demonstrated role of corticotropin-releasing factor 1 (CRF1) receptor inhibition in blocking WCE-induced cytokine mRNAs—the CRF1 receptor antagonist CP154,526 was administered to a subgroup of stressed rats and found to be inactive against induction of CCL2, TNFα, or IL-1β mRNAs. These differential results suggest that stress and WCE manifest broad neuroimmune effects in brain depending on the cytokine and brain region, and that CRF inhibition may not be a relevant mechanism in non-alcohol exposed animals. Overall, these effects are complex in terms of their neuroimmune targets and neuroanatomical specificity. Further investigation of the differential distribution of cytokine induction across neuroanatomical regions, individual cell types (e.g., neuronal phenotypes and glia), severity of chronic alcohol exposure, as well as across differing stress types may prove useful in understanding differential mechanisms of induction and for targeting select systems for pharmacotherapeutic intervention in alcoholism.

1 August 2008 in Alcohol, Clinical and Experimental Research
Verified
Journal Article
Closed access
PDF file
TWTiffany A. Wills
Tiffany A. Wills
DKDarin Knapp
Darin Knapp
DODavid H. Overstreet
David H. Overstreet
GBGeorge R. Breese
George R. Breese

4 June 2011 in Psychopharmacology
Verified
Journal Article
Closed access
PDF file
DKDarin Knapp
Darin Knapp
DODavid H. Overstreet
David H. Overstreet
MHMae Huang
Mae Huang
TWTiffany A. Wills
Tiffany A. Wills
BWBuddy A. Whitman
Buddy A. Whitman
GBGeorge R. Breese
George R. Breese