The physiological consequences of activating corticotropin-releasing factor receptor type 2 (CRF2) are not fully understood. The neuroanatomic distribution of this CRF receptor family member is consistent with roles in mediating the actions of CRF and similar ligands on food intake control and integrative aspects of stress-related behaviors. However, CRF2 expression in the adult rat is not influenced by stress, corticosterone (CORT), or food intake. In immature rat we have demonstrated striking downregulation of CRF2mRNA in hypothalamic ventromedial nucleus (VMH) after 24 hr of maternal deprivation, a paradigm consisting of both physiological/psychological stress and food deprivation. The current study aimed to distinguish which element or elements of maternal deprivation govern CRF2mRNA expression by isolating the effects of food intake and discrete maternal sensory cues on CRF2mRNA levels in VMH and in reciprocally communicating amygdala nuclei. In maternally deprived pups, CRF2mRNA levels in VMH and basomedial (BMA) and medial (MEA) amygdala nuclei were 62, 72, and 102% of control levels, respectively. Sensory inputs of grooming and handling as well as of the pups' own suckling activity-but not food intake-fully restored CRF2mRNA expression in VMH. In contrast, all manipulations tended to increase CRF2mRNA levels in BMA of maternally deprived rats, and surrogate grooming increased CRF2mRNA expression significantly above that of nondeprived controls. CRF2mRNA expression was not influenced significantly by plasma adrenocorticotropic hormone (ACTH) and CORT levels. Thus, in the immature rat, (1) CRF2 expression is regulated differentially in hypothalamic and amygdala regions, and (2) CRF2mRNA levels in VMH are governed primarily by maternal or suckling-derived sensory input rather than food intake or peripheral stress hormones. These findings indicate a region-specific regulation of CRF2mRNA, supporting the participation of the receptor in neurochemically defined circuits integrating sensory cues to influence specific behavioral and visceral functions.
Download full-text PDF |
Source |
|---|---|
| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3139461 | PMC |
| http://dx.doi.org/10.1523/JNEUROSCI.19-10-03982.1999 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Comparison of fluoride level between mother's milk and infant formula milk - a global systematic review and dental fluorosis risk assessment.
Food Addit Contam Part A Chem Anal Control Expo Risk Assess
January 2025
Department of Pediatrics and Neonatology, Guangzhou University of Traditional Chinese Medicine Dongguan Hospital, Guangdong Province, China.
Dental Fluorosis (DF) is one of the negative outcomes of excessive fluoride (F) intake through food sources. This systematic review aimed to compare F content in two important food sources for infants, Mother's Milk (MoM) and Infant Formula (IF), and then evaluate the risk of DF related to F in those two types of food. For this purpose, 181 studies were initially found by searching the relevant keywords in widely recognized databases, including Google Scholar, Scopus, Science Direct, and PubMed.
View Article and Find Full Text PDFEating disorders in medical students: prevalence, risk factors, comparison with the general population.
Front Psychol
January 2025
Department of Behavioral Sciences, University of Medicine and Pharmacy of Craiova, Craiova, Romania.
Objectives: The main objectives were to investigate the prevalence of ED and associated risk factors among medical students in Romania, as well as to determine which variables may predict ED and to explore the differences between medical students and the general population.
Methods: The Eating Disorders Inventory questionnaire (EDI-3) was applied. Also, the body mass index of the students was calculated, socio-demographic information regarding personal and family medical history was collected (mental and chronic diseases, self-reported sleep difficulties in the past 6 months, family history of obesity) and potentially risky events (history of ridicule, major negative events, social pressure to be thin from family, friends, media).
General practitioner-centered rural obesity management: Design, protocol and baseline data of the German HAPpEN pragmatic trial.
Prev Med Rep
January 2025
Institute of General Practice, Friedrich-Alexander University Erlangen, Nuernberg, Germany.
Objective: HAPpEN aims to implement and evaluate a holistic general practitioner-centered, interdisciplinary obesity management strategy in rural Germany, focusing on feasibility, health outcomes, and economic benefits.
Methods: HAPpEN is a 12-month, pragmatic single-arm, multicenter trial, informed by a formative survey, and initiated in April 2023 with 98 obese participants (body mass index, BMI ≥ 30 kg/m) in Kulmbach, Germany. The program integrates nutritional counseling, physical activity, and behavior change techniques, including smartphone-based self-monitoring.
Food insecurity, dietary quality, and the role of social network support and barriers among immigrant Latino adults in New York City.
J Hunger Environ Nutr
April 2023
Department of Environmental, Occupational and Geospatial Sciences, City University of New York School of Public Health and Health Policy.
The goal of this study is to describe the social networks of Latino immigrants (n=80) in New York City, and how various network features are linked with dietary quality and food insecurity. Participants had higher Healthy Eating Index (HEI) scores if their social networks were more transitive (β = 6.11, <0.
View Article and Find Full Text PDFEating to live well-Or worse? The role of vegan and vegetarian diets in mental health.
Nutr Health
January 2025
EvolvingFX, Jupiter, FL, USA.
Background: Over the past two decades, there has been an increase in the prevalence of psychological conditions, such as depression, anxiety, disordered eating, and body image disturbances. In concert with this trend, there was a substantial rise in the advocacy and practice of restrictive dietary patterns, such as veganism and vegetarianism. These parallel developments suggest a relation between diet and mental health, but to date, research has failed to offer clear answers on whether these associations are causal, coincidental, or more complex than superficial analyses suggest.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!