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https://www.readbyqxmd.com/read/29331172/blood-phenylalanine-reduction-corrects-cns-dopamine-and-serotonin-deficiencies-and-partially-improves-behavioral-performance-in-adult-phenylketonuric-mice
#1
Shelley R Winn, Tanja Scherer, Beat Thöny, Ming Ying, Aurora Martinez, Sydney Weber, Jacob Raber, Cary O Harding
Central nervous system (CNS) deficiencies of the monoamine neurotransmitters dopamine and serotonin have been implicated in the pathophysiology of neuropsychiatric dysfunction in human phenylketonuria (PKU). In this study, we confirmed the occurrence of brain dopamine and serotonin deficiencies in association with severe behavioral alterations and cognitive impairments in hyperphenylalaninemic C57BL/6-Pahenu2/enu2 mice, a model of human PKU. Phenylalanine-reducing treatments, including either dietary phenylalanine restriction or liver-directed gene therapy, initiated during adulthood were associated with increased brain monoamine content along with improvements in nesting behavior but without a change in the severe cognitive deficits exhibited by these mice...
January 2018: Molecular Genetics and Metabolism
https://www.readbyqxmd.com/read/29306773/midlife-stress-alters-memory-and-mood-related-behaviors-in-old-age-role-of-locally-activated-glucocorticoids
#2
Nicola Wheelan, Christopher J Kenyon, Anjanette P Harris, Carolynn Cairns, Emad Al Dujaili, Jonathan R Seckl, Joyce L W Yau
Chronic exposure to stress during midlife associates with subsequent age-related cognitive decline and may increase the vulnerability to develop psychiatric conditions. Increased hypothalamic-pituitary-adrenal (HPA) axis activity has been implicated in pathogenesis though any causative role for glucocorticoids is unestablished. This study investigated the contribution of local glucocorticoid regeneration by the intracellular enzyme 11β-hydroxysteroid dehydrogenase type 1 (11β-HSD1), in persisting midlife stress-induced behavioral effects in mice...
December 23, 2017: Psychoneuroendocrinology
https://www.readbyqxmd.com/read/29280113/-relationship-between-functional-constipation-and-brain-gut-microbiota-axis
#3
Qiyi Chen, Jun Jiang
Although with the higher prevalence, the overall treatment result of functional constipation is still not satisfied at home and abroad. The diagnosis and treatment of functional constipation are still to focus on colon itself. Functional constipation has complex interactions among intestinal flora, intestinal autonomic nerve and central nervous system. Patients with functional constipation have different degrees of mental and psychological dysfunction, and abnormal brain function can result in disorders of colon dynamics, secretion and immune function...
December 25, 2017: Zhonghua Wei Chang Wai Ke za Zhi, Chinese Journal of Gastrointestinal Surgery
https://www.readbyqxmd.com/read/29277704/prevention-of-chronic-immobilization-stress-induced-enhanced-expression-of-glucocorticoid-receptors-in-the-prefrontal-cortex-by-inactivation-of-basolateral-amygdala
#4
Sunil Jamuna Tripathi, Suwarna Chakraborty, B N Srikumar, T R Raju, B S Shankaranarayana Rao
Repeated exposure to stress precipitates anxiety, depression and cognitive deficits. Stress-induced activation of the hypothalamus-pituitary-adrenal (HPA) axis is modulated by the prefrontal cortex (PFC) and basolateral amygdala (BLA). It is well established that BLA positively regulates the HPA axis and undergoes hypertrophy following chronic immobilization stress (CIS). However, it is not known whether inactivation of the BLA can modulate the stress-induced changes in the expression of glucocorticoid receptors (GRs) in the PFC...
December 23, 2017: Journal of Chemical Neuroanatomy
https://www.readbyqxmd.com/read/29274662/inability-to-suppress-the-stress-induced-activation-of-the-hpa-axis-during-the-peripartum-period-engenders-deficits-in-postpartum-behaviors-in-mice
#5
Laverne Camille Melón, Andrew Hooper, Xuzhong Yang, Stephen J Moss, Jamie Maguire
The stress-induced activation of the hypothalamic-pituitary-adrenal (HPA) axis is normally suppressed during pregnancy. Dysregulation of the HPA axis has been proposed to play a role in postpartum depression. However, direct investigation into the relationship between the HPA axis and postpartum depression has been hindered by the lack of useful animal models. Building on our discovery of a role for the K+/Cl-co-transporter, KCC2, in the GABAergic regulation of CRH neurons in the paraventricular nucleus of the hypothalamus (PVN), critical for mounting the body's physiological response to stress, we assessed the role of KCC2 in the regulation of the HPA axis during pregnancy and the postpartum period...
December 20, 2017: Psychoneuroendocrinology
https://www.readbyqxmd.com/read/29249934/the-psychoactive-agent-crocin-can-regulate-hypothalamic-pituitary-adrenal-axis-activity
#6
Sara Asalgoo, Mahdi Tat, Hedayat Sahraei, Gila Pirzad Jahromi
Post-traumatic stress disorder (PTSD) occurs following life-threatening events. The activity of the hypothalamic-pituitary-adrenal (HPA) axis, which serves as the first line of defense against stress, is dysfunctional in this disorder. The current study aimed to investigate the role of Crocin in normalizing HPA function in an animal model of PTSD induced by electric foot shock. Rats were treated with Crocin 5 min prior to stress induction. The stimulus was re-introduced after 21 days, and we measured individual behaviors such as sniffing, rearing, grooming, and freezing...
2017: Frontiers in Neuroscience
https://www.readbyqxmd.com/read/29237154/effects-of-early-life-adversity-on-hippocampal-structures-and-associated-hpa-axis-functions
#7
Brigitte Dahmen, Vanessa B Puetz, Wolfgang Scharke, Georg G von Polier, Beate Herpertz-Dahlmann, Kerstin Konrad
Early-life adversity (ELA) is one of the major risk factors for serious mental and physical health risks later in life. ELA has been associated with dysfunctional neurodevelopment, especially in brain structures such as the hippocampus, and with dysfunction of the stress system, including the hypothalamic-pituitary-adrenal (HPA) axis. Children who have experienced ELA are also more likely to suffer from mental health disorders such as depression later in life. The exact interplay of aberrant neurodevelopment and HPA axis dysfunction as risks for psychopathology is not yet clear...
December 14, 2017: Developmental Neuroscience
https://www.readbyqxmd.com/read/29236043/stress-induced-endocrine-and-immune-dysfunctions-in-caregivers-of-people-with-eating-disorders
#8
Ángel Romero-Martínez, Luis Moya-Albiol
Caregivers have to cope repeatedly with acute stressors in their daily lives, and this is associated with disturbances in the hypothalamic-pituitary-adrenal (HPA) axis and the immune system. Such disturbances could contribute to the development of health problems in informal caregivers of people with chronic illnesses, such as eating disorders (EDs). The main objective of this study was to examine endocrine (salivary cortisol levels (Csal)), immune (immunoglobulin-A (IgA)), and psychological (anxiety, mood, and anger feelings) responses to an acute psychological stressor in a sample of informal caregivers of individuals with EDs compared to a sample of non-caregivers...
December 13, 2017: International Journal of Environmental Research and Public Health
https://www.readbyqxmd.com/read/29232329/cortisol-and-subjective-stress-responses-to-acute-psychosocial-stress-in-fibromyalgia-patients-and-control-participants
#9
Eline Coppens, Stefan Kempke, Peter Van Wambeke, Stephan Claes, Bart Morlion, Patrick Luyten, Lukas Van Oudenhove
OBJECTIVE: Hypothalamic-pituitary-adrenal (HPA) axis dysfunction may play a role in fibromyalgia (FM) pathogenesis, but remains understudied in this disorder. Furthermore, early childhood adversities (ECA) are common in FM, but whether they moderate stress reactivity is unknown. Hence, we investigated cortisol and subjective responses to acute psychosocial stress in FM and controls, while adjusting for ECA. METHODS: Twenty-seven female FM patients and 24 age-matched female controls were recruited in a tertiary care center and through advertisements, respectively...
December 11, 2017: Psychosomatic Medicine
https://www.readbyqxmd.com/read/29186699/seizure-induced-activation-of-the-hpa-axis-increases-seizure-frequency-and-comorbid-depression-like-behaviors
#10
Andrew Hooper, Rumzah Paracha, Jamie Maguire
Our laboratory recently demonstrated that seizures activate the hypothalamic-pituitary-adrenal (HPA) axis, increasing circulating levels of corticosterone (O'Toole et al., 2013). Given the well-established proconvulsant actions of corticosterone, we hypothesized that seizure-induced activation of the HPA axis may contribute to future seizure susceptibility. Further, since hypercortisolism is associated with depression, we propose that seizure-induced activation of the HPA axis may contribute to comorbid depression and epilepsy...
November 26, 2017: Epilepsy & Behavior: E&B
https://www.readbyqxmd.com/read/29132028/dna-methylation-and-genetic-variation-of-the-angiotensin-converting-enzyme-ace-in-depression
#11
Dilys Lam, Marie-Laure Ancelin, Karen Ritchie, Richard Saffery, Joanne Ryan
BACKGROUND: Depression is one of the most prevalent psychiatric disorders, and in older persons is associated with high levels of comorbidity and under-treatment. Dysfunction of the hypothalamic-pituitary-adrenal (HPA) stress axis is consistently observed in the older population as well as depressed patients, with the angiotensin converting enzyme (ACE) a key regulator of the stress response. Epigenetic regulation of ACE may play an important role in HPA axis (dys)regulation. OBJECTIVE: To investigate ACE promoter methylation as a biomarker of late-life depression, and its association with genetic variation and cortisol secretion...
November 8, 2017: Psychoneuroendocrinology
https://www.readbyqxmd.com/read/29128343/post-stroke-depression-mechanisms-and-pharmacological-treatment
#12
REVIEW
Roberto Federico Villa, Federica Ferrari, Antonio Moretti
Depression, the most frequent psychiatric disorder following ischaemic stroke, negatively affects survivals' functional outcome, response to rehabilitation and quality of life. Approximately, one-third of them are affected by post-stroke depression (PSD), making it a serious social and public health problem and anti-depressant preventive and curative therapies worth investigating. However, a two-way association between depression and stroke has been also established: stroke increases the risk of PSD, but depression is an independent risk factor for stroke...
November 9, 2017: Pharmacology & Therapeutics
https://www.readbyqxmd.com/read/29125115/roles-of-hypothalamic-pituitary-adrenal-axis-and-hypothalamus-pituitary-ovary-axis-in-the-abnormal-endocrine-functions-in-patients-with-polycystic-ovary-syndrome
#13
Fan Wang, Zheng-Hong Zhang, Kai-Zhuan Xiao, Zheng-Chao Wang
Polycystic ovary syndrome(PCOS) is a common reproductive endocrine disease in women of childbearing age. While it can be affected by a variety of factors,its pathophysiology remains unclear. Its clinical features mainly include anovulation,hyperandrogenism,and hyperinsulinemia,which are closely related with abnormal neuroendocrine system. Hypothalamic-pituitary-gonadal axis(HPG) plays a crucial regulatory role in various life activities in mammals. In particular,hypothalamic-pituitary-adrenal(HPA) axis and hypothalamus-pituitary-ovary(HPO) axis can be abnormal in PCOS patients...
October 30, 2017: Zhongguo Yi Xue Ke Xue Yuan Xue Bao. Acta Academiae Medicinae Sinicae
https://www.readbyqxmd.com/read/29084144/bipolar-disorder-and-immune-dysfunction-epidemiological-findings-proposed-pathophysiology-and-clinical-implications
#14
REVIEW
Joshua D Rosenblat, Roger S McIntyre
Bipolar disorder (BD) is strongly associated with immune dysfunction. Replicated epidemiological studies have demonstrated that BD has high rates of inflammatory medical comorbidities, including autoimmune disorders, chronic infections, cardiovascular disease and metabolic disorders. Cytokine studies have demonstrated that BD is associated with chronic low-grade inflammation with further increases in pro-inflammatory cytokine levels during mood episodes. Several mechanisms have been identified to explain the bidirectional relationship between BD and immune dysfunction...
October 30, 2017: Brain Sciences
https://www.readbyqxmd.com/read/29080551/the-dexamethasone-corticotropin-releasing-hormone-test-in-healthy-and-depressed-women-with-and-without-childhood-adversity
#15
Carsten Spitzer, Christian Otte, Linn K Kuehl, Anita May, Katharina Schultebraucks, Julian Hellmann-Regen, Katja Wingenfeld
BACKGROUND: Alterations of the hypothalamic-pituitary-adrenal (HPA) axis are a prominent finding in patients with major depressive disorder (MDD). Inconsistencies regarding a hyper- or hypoactive HPA axis may be explained by the moderating effect of childhood adverse experiences (ACE) which are associated with both HPA axis dysfunction and MDD in adulthood. We aimed to systematically disentangle the effects of ACE and MDD on HPA axis by comparing healthy women with and without childhood adversity and women with MDD with and without ACE...
October 23, 2017: Psychoneuroendocrinology
https://www.readbyqxmd.com/read/29068243/evidence-for-disruption-of-normal-circadian-cortisol-rhythm-in-women-with-obesity
#16
Zain A Al-Safi, Alex Polotsky, Justin Chosich, Lauren Roth, Amanda A Allshouse, Andrew P Bradford, Nanette Santoro
Hyperactivity of the hypothalamic-pituitary-adrenal (HPA) axis may play a role in the pathogenesis of comorbidities encountered in obesity, including the relative hypogonadotropic hypogonadism that we and others have observed. We sought to examine serum cortisol profiles throughout the day and evening in a sample of normal weight women and women with obesity. In this cross-sectional study, regularly cycling obese (n = 12) and normal weight (n = 10) women were recruited. Mean serum cortisol was measured by frequent blood sampling for 16 h (8am-midnight) in the luteal phase of the menstrual cycle...
October 25, 2017: Gynecological Endocrinology
https://www.readbyqxmd.com/read/29063119/-inflammatory-mechanism-of-depression-and-its-new-strategy%C3%A2-for-diagnosis-and%C3%A2-treatment
#17
Wen-Jun Su, Zhi-Yong Cao, Chun-Lei Jiang
Depression is a major class of mental illness; owing to its high prevalence, high disability rate and heavy disease burden, it has become a stern and formidable global health problem. It is generally believed that the etiology of depression is multifactorial, which is related to gender differences, chronic stress, dietary behavior and drug abuse. At present, the exact pathophysiological mechanism of depression still remains unclear, but researchers across the globe put forward various hypotheses to interpret the possible access to this disease, including monoamine neurotransmitter disturbance, hypothalamic-pituitary-adrenal (HPA) axis dysfunction, lack of neurotrophic factors and excessive pro-inflammatory cytokines...
October 25, 2017: Sheng Li Xue Bao: [Acta Physiologica Sinica]
https://www.readbyqxmd.com/read/29061385/modified-single-prolonged-stress-reduces-cocaine-self-administration-during-acquisition-regardless-of-rearing-environment
#18
Rebecca S Hofford, Mark A Prendergast, Michael T Bardo
Until recently, there were few rodent models available to study the interaction of post-traumatic stress disorder (PTSD) and drug taking. Like PTSD, single prolonged stress (SPS) produces hypothalamic-pituitary-adrenal (HPA) axis dysfunction and alters psychostimulant self-administration. Other stressors, such as isolation stress, also alter psychostimulant self-administration. However, it is currently unknown if isolation housing combined with SPS can alter the acquisition or maintenance of cocaine self-administration...
February 15, 2018: Behavioural Brain Research
https://www.readbyqxmd.com/read/29023418/association-between-stress-and-the-hpa-axis-in-the-atopic-dermatitis
#19
REVIEW
Tzu-Kai Lin, Lily Zhong, Juan Luis Santiago
The hypothalamic-pituitary-adrenal (HPA) axis is one of the body's neuroendocrine networks that responds to psychological stress (PS). In the skin, there exists a peripheral HPA axis similar to the central axis. Glucocorticoids (GCs) are key effector molecules of the HPA axis and are essential for cutaneous homeostasis. Atopic dermatitis (AD) is a condition typically characterized by a chronic relapsing course that often results in PS. HPA dysfunction is present in AD patients by the decreased response of GCs elevation to stress as compared to those unaffected by AD...
October 12, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/29020649/neuroendocrine-stress-reactivity-of-male-c57bl-6n-mice-following-chronic-oral-corticosterone-exposure-during-adulthood-or-adolescence
#20
Ziasmin Shahanoor, Razia Sultana, Madelyn R Baker, Russell D Romeo
Adolescence is associated with the maturation of the hypothalamic-pituitary-adrenal (HPA) axis, the major neuroendocrine axis mediating the hormonal stress response. Adolescence is also a period in development marked by a variety of stress-related vulnerabilities, including psychological and physiological dysfunctions. Many of these vulnerabilities are accompanied by a disrupted HPA axis. In adult mice, a model of disrupted HPA function has been developed using oral chronic corticosterone administration via the drinking water, which results in various physiological and neurobehavioral abnormalities, including changes in stress reactivity and anxiety-like behaviors...
December 2017: Psychoneuroendocrinology
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