Recent diffusion tensor imaging (DTI) studies fnsm our laboratory and others have demonstrated significantly reduced fractional anisotropy (FA) in the corpus callosum in cocaine-dependent subjects relative to controls. The changes in FA have been interpreted as an indication of altered myelin. The specific underlying neuropathology of these white matter changes and if these pathological changes can be altered by cocaine abstinence or novel phramacotherapy, however, remain to be determined. Understanding the pathological changes between nornial, healthy individuals and cocaine-addicts is not simple because of difficulties in creating a completely controlled environment. In addition, histologic confirmation of the proposed pathologic mechanism is difficult to realize in humans. In the proposed translational studies, using multi-modal magnetic resonance imaging and end point histology in rodents treated with chronic cocaine, we will determine the effects of 1) dose of cocaine and method of administration on a) regional brain atrophy measured on high resolution structural MRI with tensor based morphometry, b) white matter pathology as measured by DTI and magnetization transfer ratio, c) regional cerebral blood flow as determined by MRI-based arterial spin labeling, and d) metabolite concentrations as determined by proton magnetic resonance spectn^scopy and 2) administration of the novel adenosine A2A receptor antagonist SYN115 on cocaine associated white matter pathology, regional brain volumes and regional cerebral blood flow. These multi-modal studies in rodents should help characterize neuropathological changes and institute rational-based treatments in human cocaine abusers.
Cocaine dependence is associated with changes in brain structure and function. This study will use animal models of cocaine use to determine the underiying pathology of these changes and determine if novel medications could reverse these pathological changes.
|Lindsay, Jan A; Minard, Charles G; Hudson, Sonora et al. (2014) Using prize-based incentives to enhance daily interactive voice response (IVR) compliance: a feasibility study. J Subst Abuse Treat 46:74-7|
|Sharma, Jyoti; Rathnayaka, Nuvan; Green, Charles et al. (2014) Bradycardia as a Marker of Chronic Cocaine Use: A Novel Cardiovascular Finding. Behav Med :1-8|
|Schmitz, Joy M; Green, Charles E; Stotts, Angela L et al. (2014) A two-phased screening paradigm for evaluating candidate medications for cocaine cessation or relapse prevention: modafinil, levodopa-carbidopa, naltrexone. Drug Alcohol Depend 136:100-7|
|Narayana, Ponnada A; Herrera, Juan J; Bockhorst, Kurt H et al. (2014) Chronic cocaine administration causes extensive white matter damage in brain: diffusion tensor imaging and immunohistochemistry studies. Psychiatry Res 221:220-30|
|Farris, Samantha G; Zvolensky, Michael J; Beckham, Jean C et al. (2014) Trauma exposure and cigarette smoking: the impact of negative affect and affect-regulatory smoking motives. J Addict Dis 33:354-65|
|Hasan, Khader M; Moeller, F Gerard; Narayana, Ponnada A (2014) DTI-based segmentation and quantification of human brain lateral ventricular CSF volumetry and mean diffusivity: validation, age, gender effects and biophysical implications. Magn Reson Imaging 32:405-12|
|Fineberg, Naomi A; Chamberlain, Samuel R; Goudriaan, Anna E et al. (2014) New developments in human neurocognition: clinical, genetic, and brain imaging correlates of impulsivity and compulsivity. CNS Spectr 19:69-89|
|Lane, Scott D; Green, Charles E; Schmitz, Joy M et al. (2014) Comparison of Caffeine and d-amphetamine in Cocaine-Dependent Subjects: Differential Outcomes on Subjective and Cardiovascular Effects, Reward Learning, and Salivary Paraxanthine. J Addict Res Ther 5:176|
|Liu, Shijing; Green, Charles E; Lane, Scott D et al. (2014) The influence of dopamine ?-hydroxylase gene polymorphism rs1611115 on levodopa/carbidopa treatment for cocaine dependence: a preliminary study. Pharmacogenet Genomics 24:370-3|
|Anastasio, N C; Liu, S; Maili, L et al. (2014) Variation within the serotonin (5-HT) 5-HT?C receptor system aligns with vulnerability to cocaine cue reactivity. Transl Psychiatry 4:e369|
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