Article
Multidisciplinary Sciences
Hongli Li, Yuanzhong Xu, Yanyan Jiang, Zhiying Jiang, Joshua Otiz-Guzman, Jessie C. Morrill, Jing Cai, Zhengmei Mao, Yong Xu, Benjamin R. Arenkiel, Cheng Huang, Qingchun Tong
Summary: Inhibition of hypothalamic melanocortin action leads to obesity, while chronic activation does not cause weight loss. The bidirectional regulation of body weight by melanocortin action cannot explain the difficulty in finding effective therapeutics for general obesity. This study demonstrates that altered melanocortin action is one-directional, with chronic inhibition causing obesity but chronic activation failing to reduce body weight. These findings provide a neural basis for the predisposition to obesity development and the bias of melanocortin action towards protecting weight loss.
NATURE COMMUNICATIONS
(2023)
Article
Endocrinology & Metabolism
Alessia Perino, Laura A. Velazquez-Villegas, Nadia Bresciani, Yu Sun, Qingyao Huang, Valerie S. Fenelon, Ashley Castellanos-Jankiewicz, Philippe Zizzari, Giuseppe Bruschetta, Sungho Jin, Aiste Baleisyte, Antimo Gioiello, Roberto Pellicciari, Julijana Ivanisevic, Bernard L. Schneider, Sabrina Diano, Daniela Cota, Kristina Schoonjans
Summary: Bile acids can reach the brain and activate a negative-feedback loop through TGR5, controlling satiety in response to physiological feeding.
Article
Endocrinology & Metabolism
Ngoc N. Nguyen, Ruma G. Singh, Maxim S. Petrov
Summary: Fasting levels of leptin and the leptin/ghrelin ratio are significantly associated with excess intrapancreatic fat deposition, while postprandial levels of these hormones show no significant association.
ANNALS OF NUTRITION AND METABOLISM
(2022)
Article
Neurosciences
Sarthak M. Singhal, Vivien Zell, Lauren Faget, Lauren M. Slosky, Lawrence S. Barak, Marc G. Caron, Anthony B. Pinkerton, Thomas S. Hnasko
Summary: The strong expression of NTR1 in VTA DA neurons and terminals makes it an attractive target to modulate DA neuron activity and normalize DA-related pathologies. SBI-553 acts as a positive allosteric modulator of NTR1 beta-arrestin recruitment and antagonizes NTR1 Gq protein signaling. It blunts NT's effects on spontaneous DA neuron firing, D2 auto-receptor function, and DA release without independently affecting these measures.
Article
Nutrition & Dietetics
Svenja Meyhoefer, Rodrigo Chamorro, Manfred Hallschmid, Denisa Spyra, Nelli Klinsmann, Bernd Schultes, Hendrik Lehnert, Sebastian M. Meyhoefer, Britta Wilms
Summary: Evidence shows that reduced sleep duration can increase hunger, appetite, and food intake, leading to metabolic diseases like type 2 diabetes and obesity. However, the impact of sleep timing on hunger and appetite regulation is less clear independent of sleep duration. This study aimed to evaluate the effect of sleep loss during late night vs. early night on hunger, appetite, and desire for food. The results indicate that sleep loss during late night, but not early night, increases ghrelin levels and feelings of hunger and appetite, highlighting the metabolic relevance of chronobiological sleep timing.
Article
Endocrinology & Metabolism
Teresa E. Daniels, Karen Jennings Mathis, Asi Polly Gobin, William W. Lewis-de los Angeles, Eric M. Smith, Pranavan Chanthrakumar, Suzanne de la Monte, Audrey R. Tyrka
Summary: This study examined the levels of leptin and ghrelin in young adults with and without early life stress (ELS). The findings showed that the relationship between ELS and higher leptin levels became non-significant when accounting for body mass index (BMI), while the relationship between ELS and lower ghrelin levels remained significant, even after adjusting for BMI. Current psychiatric disorder was also found to be associated with higher leptin levels and lower ghrelin levels. These results suggest that BMI and psychiatric functioning may play important roles in the relationship between ELS and cardiometabolic health.
PSYCHONEUROENDOCRINOLOGY
(2023)
Article
Neurosciences
Mark A. Rossi, Marcus L. Basiri, Yuejia Liu, Yoshiko Hashikawa, Koichi Hashikawa, Lief E. Fenno, Yoon Seok Kim, Charu Ramakrishnan, Karl Deisseroth, Garret D. Stuber
Summary: The lateral hypothalamic area (LHA) contains distinct populations of glutamatergic neurons that project to different brain regions, with neurons projecting to the lateral habenula (LHb) or ventral tegmental area (VTA) showing anatomical, transcriptional, electrophysiological, and functional differences. Neurons projecting to the LHb are particularly sensitive to satiety state and feeding hormones, indicating differential processing of reward and aversion stimuli in divergent efferent pathways.
Review
Medicine, General & Internal
Christina N. Boyle, Yi Zheng, Thomas A. Lutz
Summary: Amylin, a pancreatic beta-cell hormone, plays important physiological roles in metabolic control, such as regulating satiation, gastric emptying, and glucagon secretion. Amylin analogs have emerged as promising approaches for obesity and diabetes treatment.
JOURNAL OF CLINICAL MEDICINE
(2022)
Article
Clinical Neurology
Bradley E. Aouizerat, Eeeseung Byun, Clive R. Pullinger, Caryl Gay, Anners Lerdal, Kathryn A. Lee
Summary: The study found associations between selected genes and plasma markers related to energy homeostasis and sleep disruption in adults with HIV/AIDS. Many of these associations were influenced by HIV disease markers. Higher levels of adiponectin were associated with less wake after sleep onset, while higher levels of ghrelin and glucose were associated with shorter total sleep time, and higher levels of leptin were associated with longer total sleep time.
Review
Neurosciences
Lukas T. Oesch, Antoine R. Adamantidis
Summary: This review focuses on the electrical activity of feeding-promoting cells in the lateral hypothalamus across different states of vigilance, with a specific emphasis on REM sleep and its role in brain plasticity related to energy homeostasis and behavioral optimization.
TRENDS IN NEUROSCIENCES
(2021)
Article
Neurosciences
Saobo Lei, Binqi Hu
Summary: Neurotensin (NT) acts as a neuromodulator in the brain, regulating various physiological functions. Activation of NTS1 receptors in the central amygdala leads to increased excitability of CeL neurons, involving phospholipase C beta (pLc beta) and phosphatidylinositol 4,5-bisphosphate (PIP2) depletion, but not intracellular Ca2+ release or PKC. NT excites CeL neurons by decreasing membrane conductance and inhibiting Kir channels, while also modulating network activity through GABAergic inhibition in the amygdala.
Article
Endocrinology & Metabolism
Andrew I. Sullivan, Meghan C. Naber, Kyle H. Flippo, Donald A. Morgan, Tate J. Neff, Sharon O. Jensen -Cody, Zhiyong Zhu, Leonid V. Zingman, Kamal Rahmouni, Matthew J. Potthoff
Summary: This study reveals the importance of the endocrine crosstalk between liver-and adipose-derived signals in the central nervous system for the regulation of energy homeostasis and body weight. FGF21 signaling to glutamatergic neurons and leptin receptor-expressing cells is necessary for FGF21 to modulate energy expenditure and promote weight loss. Co-administration of FGF21 and leptin synergistically leads to robust weight loss.
MOLECULAR METABOLISM
(2022)
Article
Endocrinology & Metabolism
Marta Porniece Kumar, Anna Lena Cremer, Paul Klemm, Lukas Steuernagel, Sivaraj Sundaram, Alexander Jais, A. Christine Hausen, Jenkang Tao, Anna Secher, Thomas Askov Pedersen, Markus Schwaninger, F. Thomas Wunderlich, Bradford B. Lowell, Heiko Backes, Jens C. Bruening
Summary: The insulin receptors in tanycytes play a critical role in regulating insulin access to the hypothalamic arcuate nucleus, impacting AgRP neuronal activity in response to feeding and contributing to obesity-associated insulin resistance. These receptors are necessary for the orexigenic effects of ghrelin and affect systemic insulin sensitivity. Compared to IR increment Tan mice, normal mice show better AgRP neuronal adaptations and insulin signaling.
Article
Endocrinology & Metabolism
Maria Elena Martinez, Zhaofei Wu, Arturo Hernandez
Summary: A mouse model of developmental thyrotoxicosis was used to study the effects of paternal thyroid hormone excess on the endocrine programming and energy balance of the offspring. Female offspring exhibited higher body weight and fat mass, while male offspring showed milder effects. In addition, fasting had a greater impact on the body weight and hormonal and gene expression profiles of the female offspring. These findings suggest that parental endocrine conditions can have a non-genetic, inherited impact on the etiology of endocrine and metabolic disorders in the offspring.
FRONTIERS IN ENDOCRINOLOGY
(2023)
Article
Neurosciences
Gemma Navarro, William Rea, Cesar Quiroz, Estefania Moreno, Devan Gomez, Cody J. Wenthur, Vicent Casado, Lorenzo Leggio, Matthew C. Hearing, Sergi Ferre
Summary: GHS-R1b facilitates oligomerization with GHS-R1a, impacting its pharmacological properties, but GHSR1a:GHS-R1b:D1R oligomers in the VTA are the main mediators of the dopaminergic effects of ghrelin.
JOURNAL OF NEUROSCIENCE
(2022)
Article
Cell Biology
Hillary L. Woodworth, Hannah M. Batchelor, Bethany G. Beekly, Raluca Bugescu, Juliette A. Brown, Gizem Kurt, Patrick M. Fuller, Gina M. Leinninger
Article
Hematology
Bradley P. Sullivan, Anna K. Kopec, Nikita Joshi, Holly Cline, Juliette A. Brown, Stephanie C. Bishop, Karen M. Kassel, Cheryl Rockwell, Nigel Mackman, James P. Luyendyk
Article
Endocrinology & Metabolism
Darren Opland, Amy Sutton, Hillary Woodworth, Juliette Brown, Raluca Bugescu, Adriana Garcia, Lyndsay Christensen, Christopher Rhodes, Martin Myers, Gina Leinninger
MOLECULAR METABOLISM
(2013)
Article
Endocrinology & Metabolism
Laura E. Schroeder, Ryan Furdock, Cristina Rivera Quiles, Gizem Kurt, Patricia Perez-Bonilla, Angela Garcia, Crystal Colon-Ortiz, Juliette Brown, Raluca Bugescu, Gina M. Leinninger
Article
Multidisciplinary Sciences
Michelle A. King, Matthew D. Ward, Thomas A. Mayer, Mark L. Plamper, Clifford M. Madsen, Samuel N. Cheuvront, Robert W. Kenefick, Lisa R. Leon
Article
Physiology
Roy M. Salgado, Kirsten E. Coffman, Karleigh E. Bradbury, Katherine M. Mitchell, Beau R. Yurkevicius, Adam J. Luippold, Thomas A. Mayer, Nisha Charkoudian, Billie K. Alba, Charles S. Fulco, Robert W. Kenefick
AMERICAN JOURNAL OF PHYSIOLOGY-REGULATORY INTEGRATIVE AND COMPARATIVE PHYSIOLOGY
(2020)
Article
Medicine, General & Internal
Beau R. Yurkevicius, Karleigh E. Bradbury, Adam C. Nixon, Katherine M. Mitchell, Adam J. Luippold, Thomas A. Mayer, Billie K. Alba, Roy M. Salgado, Nisha Charkoudian
Article
Physiology
Aaron R. Caldwell, Kentaro Oki, Shauna M. Ward, Jermaine A. Ward, Thomas A. Mayer, Mark L. Plamper, Michelle A. King, Lisa R. Leon
Summary: The study found that mice undergoing repeated exertional heat injuries within a week of an initial heat injury appear to have protective adaptations. During the second exertional heat injury, mice were able to run longer and sustain higher body temperatures before collapse. However, despite this increased resilience to heat, the mice undergoing a second exertional heat injury showed lower levels of corticosterone, FABP2, MIP-1b, MIP-2, and IP-10, indicating potential adaptive processes providing acute heat resilience to subsequent conditions.
JOURNAL OF APPLIED PHYSIOLOGY
(2021)
Article
Biology
Thomas A. Mayer, Aaron R. Caldwell, Catherine O'Brien
Summary: This study examined the agreement of two telemetric temperature capsules and found notable variability between them, especially after crossing a cold river.
JOURNAL OF THERMAL BIOLOGY
(2022)
Article
Psychology, Biological
Gizem Kurt, Nandan Kodur, Cristina Rivera Quiles, Chelsea Reynolds, Andrew Eagle, Tom Mayer, Juliette Brown, Anna Makela, Raluca Bugescu, Harim Delgado Seo, Quinn E. Carroll, Derek Daniels, A. J. Robison, Michelle Mazei-Robison, Gina Leinninger
Summary: The research suggests that LHA(Nts) neurons play a crucial role in modulating feeding and drinking behaviors based on timing and resource availability, particularly promoting drinking during the light cycle without the necessity for maintaining hydration balance.
PHYSIOLOGY & BEHAVIOR
(2022)
Article
Endocrinology & Metabolism
Juliette Brown, Andrew Sagante, Thomas Mayer, Anna Wright, Raluca Bugescu, Patrick M. Fuller, Gina Leinninger
Review
Neurosciences
Juliette A. Brown, Hillary L. Woodworth, Gina M. Leinninger
FRONTIERS IN SYSTEMS NEUROSCIENCE
(2015)