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Amal Alachkar, Lamees Alhassen, Zhiwei Wang, Lien Wang, Kara Onouye, Nayna Sanathara, Olivier Civelli
In order to prepare the mother for the demands of pregnancy and lactation, the maternal brain is subjected to a number of adaptations. Maternal behaviors are regulated by complex neuronal interactions. Here, we show that the melanin concentrating hormone (MCH) system is an important regulator of maternal behaviors. First, we report that melanin concentrating hormone receptor 1 knockout (MCHR1 KO) mice display a disruption of maternal behavior. Early postpartum MCHR1 KO females exhibit poor nesting, deficits in pup retrieval and maternal aggression...
September 8, 2016: European Neuropsychopharmacology: the Journal of the European College of Neuropsychopharmacology
Lien Wang, Amal Alachkar, Nayna Sanathara, James D Belluzzi, Zhiwei Wang, Olivier Civelli
BACKGROUND: Modulating the methylation process induces broad biochemical changes, some of which may be involved in schizophrenia. Methylation is in particular central to epigenesis, which is also recognized as a factor in the etiology of schizophrenia. Because methionine administration to patients with schizophrenia has been reported to exacerbate their psychotic symptoms and because mice treated with methionine exhibited social deficits and prepulse inhibition impairment, we investigated whether methionine administration could lead to behavioral changes that reflect schizophrenic symptoms in mice...
November 2015: International Journal of Neuropsychopharmacology
Kevin Sinchak, Lauren Dalhousay, Nayna Sanathara
Orphanin FQ (OFQ/N) and its receptor, opioid receptor-like receptor-1 (ORL-1), are expressed throughout steroid-responsive limbic and hypothalamic circuits that regulate female ovarian hormone feedback and reproductive behavior circuits. The arcuate nucleus of the hypothalamus (ARH) is a brain region that expresses OFQ/N and ORL-1 important for both sexual behavior and modulating estradiol feedback loops. Within the ARH, the activation of the OFQ/N-ORL-1 system facilitates sexual receptivity (lordosis) through the inhibition of β-endorphin neuronal activity...
2015: Vitamins and Hormones
Nayna M Sanathara, Justine Moreas, Matthew Mahavongtrakul, Kevin Sinchak
BACKGROUND: Ovarian steroids regulate sexual receptivity in the female rat by acting on neurons that converge on proopiomelanocortin (POMC) neurons in the arcuate nucleus of the hypothalamus (ARH) that project to the medial preoptic nucleus (MPN). Estradiol rapidly activates these neurons to release β-endorphin that activates MPN μ-opioid receptors (MOP) to inhibit lordosis. Lordosis is facilitated by the subsequent action of progesterone that deactivates the estradiol-induced MPN MOP activation...
2014: Neuroendocrinology
Gregory S Parks, Nicholas D Olivas, Taruna Ikrar, Nayna M Sanathara, Lien Wang, Zhiwei Wang, Olivier Civelli, Xiangmin Xu
Melanin-concentrating hormone (MCH)-producing neurons are known to regulate a wide variety of physiological functions such as feeding, metabolism, anxiety and depression, and reward. Recent studies have revealed that MCH neurons receive projections from several wake-promoting brain regions and are integral to the regulation of rapid eye movement (REM) sleep. Here, we provide evidence in both rats and mice that MCH neurons express histamine-3 receptors (H3R), but not histamine-1 (H1R) or histamine-2 (H2R) receptors...
May 15, 2014: Journal of Physiology
Nayna M Sanathara, Justine Moraes, Shrey Kanjiya, Kevin Sinchak
Sexual receptivity, lordosis, can be induced by sequential estradiol and progesterone or extended exposure to high levels of estradiol in the female rat. In both cases estradiol initially inhibits lordosis through activation of β-endorphin (β-END) neurons of the arcuate nucleus of the hypothalamus (ARH) that activate μ-opioid receptors (MOP) in the medial preoptic nucleus (MPN). Subsequent progesterone or extended estradiol exposure deactivates MPN MOP to facilitate lordosis. Opioid receptor-like receptor-1 (ORL-1) is expressed in ARH and ventromedial hypothalamus (VMH)...
November 2011: Hormones and Behavior
Barton J Blinder, Edward J Cumella, Visant A Sanathara
OBJECTIVE: We analyze 27 point-prevalent DSM-IV Axis I comorbidities for eating disorder inpatients. METHODS: The sample included 2436 female inpatients treated between January 1, 1995, and December 31, 2000, for primary DSM-IV diagnoses of anorexia, bulimia, and eating disorder not otherwise specified. Analyses were multivariate analysis of variance and multinomial logistic regression; sociodemographics and severity-of-illness measures were controlled. RESULTS: Ninety-seven percent of patients evidenced > or = 1 comorbid diagnoses; 94% evidenced comorbid mood disorders, largely unipolar depression, with no differences across eating disorders; 56% evidenced anxiety disorders, with no differences across eating disorders; and 22% evidenced substance use disorders, with significant differences across eating disorders (p < ...
May 2006: Psychosomatic Medicine
V A Sanathara, C O Gardner, C A Prescott, K S Kendler
BACKGROUND: Although prior research has demonstrated a strong association between interpersonal dependency (IPD) levels and risk for major depression (MD), the possible aetiological explanations of this association as well as any gender differences in the IPD-MD relationship need further clarification. METHOD: Population-based twin samples (N = 7174) were interviewed in multiple waves to assess IPD and MD as part of a larger twin study. IPD levels were assessed using the Interpersonal Dependency Inventory while MD diagnoses were derived from the SCID...
July 2003: Psychological Medicine
B J Blinder, S Bhat, V A Sanathara
No abstract text is available yet for this article.
July 1998: Western Journal of Medicine
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