The candidate requests support for a five year program of training and research to better understand how brain biochemistry and neural activity are altered in bipolar disorder. In the proposed training program, the candidate will build upon his previous experience in basic neuroscience research and clinical psychiatry to perform a multidisciplinary project at McLean Hospital and the Beth-Israel Deaconess Medical Center. His training plan includes: 1) training in the application of Magnetic Resonance Spectroscopy (MRS) to in vivo studies of neurotransmitter activity and brain metabolism 2) training in the use of functional Magnetic Resonance Imaging (fMRI) to examine neural network activity 3) training in the design and execution of patient oriented investigation and 4) training in the responsible conduct of research. A hallmark feature of bipolar disorder is that it is episodic in nature with what appear to be spontaneous transitions to pathological states and subsequent reversion to euthymia or transition to another state. There is little understood about the biology that gives rise to this instability in mood state or the processes that make these states transitory. This study proposes that the pathophysiology of bipolar disorder is characterized by: 1) original abnormal functional coupling between the brain regions involved in affective regulation, and 2) compensatory changes in neurotransmission. These alterations set in motion a series of forces that generate instability in brain function. The candidate's research plan seeks to: 1) explore the relationship between brain network activity and mood state in bipolar disorder and 2) test a model of mood state switching that proposes a balance of excitatory and inhibitory neurotransmission that can compensate for trait related alterations in brain network connectivity. This study proposes to address this hypothesis by observing brain network activity as well as measuring neurotransmitters and markers of neuronal activity in vivo. These experiments will be performed in a single cohort of subjects with bipolar disorder longitudinally through clinical states of mania and euthymia. In doing so, this study seeks to minimize many substantial confounds of studying this disorder including disease heterogeneity, diagnostic instability, and medication effects. The broader aim of this research is to understand the physiology of state switching in bipolar disorder. This disorder is a common and debilitating illness and current treatments are only partially effective. An understanding of the physiologic basis of transitions between states will allow the development of better interventions to prevent pathological switching to mania or depression.

Public Health Relevance

Bipolar Disorder is a chronic and debilitating illness that is characterized by episodes of both depression and mania and is thought to affect 2% of the population. Our current treatments for this disorder are limited by our understanding of the biology underlying the brain's ability to enter states of depression or mania. This study seeks to understand how brain chemistry and activity are altered in these states to that we may design more effect treatments to prevent them.

Agency
National Institute of Health (NIH)
Institute
National Institute of Mental Health (NIMH)
Type
Mentored Patient-Oriented Research Career Development Award (K23)
Project #
1K23MH100623-01A1
Application #
8635732
Study Section
Neural Basis of Psychopathology, Addictions and Sleep Disorders Study Section (NPAS)
Program Officer
Chavez, Mark
Project Start
2013-12-11
Project End
2018-11-30
Budget Start
2013-12-11
Budget End
2014-11-30
Support Year
1
Fiscal Year
2014
Total Cost
$176,076
Indirect Cost
$13,043
Name
Beth Israel Deaconess Medical Center
Department
Type
DUNS #
071723621
City
Boston
State
MA
Country
United States
Zip Code
02215