|
1
|
Nyema NT, McKnight AD, Vargas-Elvira AG, Schneps HM, Gold EG, Myers KP, Alhadeff AL. AgRP neuron activity promotes associations between sensory and nutritive signals to guide flavor preference. Mol Metab 2023; 78:101833. [PMID: 37925021 PMCID: PMC10665654 DOI: 10.1016/j.molmet.2023.101833] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/23/2023] [Revised: 10/20/2023] [Accepted: 10/30/2023] [Indexed: 11/06/2023] Open
Abstract
OBJECTIVE The learned associations between sensory cues (e.g., taste, smell) and nutritive value (e.g., calories, post-ingestive signaling) of foods powerfully influences our eating behavior [1], but the neural circuits that mediate these associations are not well understood. Here, we examined the role of agouti-related protein (AgRP)-expressing neurons - neurons which are critical drivers of feeding behavior [2; 3] - in mediating flavor-nutrient learning (FNL). METHODS Because mice prefer flavors associated with AgRP neuron activity suppression [4], we examined how optogenetic stimulation of AgRP neurons during intake influences FNL, and used fiber photometry to determine how endogenous AgRP neuron activity tracks associations between flavors and nutrients. RESULTS We unexpectedly found that tonic activity in AgRP neurons during FNL potentiated, rather than prevented, the development of flavor preferences. There were notable sex differences in the mechanisms for this potentiation. Specifically, in male mice, AgRP neuron activity increased flavor consumption during FNL training, thereby strengthening the association between flavors and nutrients. In female mice, AgRP neuron activity enhanced flavor-nutrient preferences independently of consumption during training, suggesting that AgRP neuron activity enhances the reward value of the nutrient-paired flavor. Finally, in vivo neural activity analyses demonstrated that acute AgRP neuron dynamics track the association between flavors and nutrients in both sexes. CONCLUSIONS Overall, these data (1) demonstrate that AgRP neuron activity enhances associations between flavors and nutrients in a sex-dependent manner and (2) reveal that AgRP neurons track and rapidly update these associations. Taken together, our findings provide new insight into the role of AgRP neurons in assimilating sensory and nutritive signals for food reinforcement.
Collapse
Affiliation(s)
- Nathaniel T Nyema
- Monell Chemical Senses Center, Philadelphia, PA 19104, USA; University of Pennsylvania, Philadelphia, PA 19104, USA
| | - Aaron D McKnight
- Monell Chemical Senses Center, Philadelphia, PA 19104, USA; University of Pennsylvania, Philadelphia, PA 19104, USA
| | | | - Heather M Schneps
- Monell Chemical Senses Center, Philadelphia, PA 19104, USA; University of Pennsylvania, Philadelphia, PA 19104, USA
| | | | | | - Amber L Alhadeff
- Monell Chemical Senses Center, Philadelphia, PA 19104, USA; University of Pennsylvania, Philadelphia, PA 19104, USA.
| |
Collapse
|
|
2
|
Iwasa T, Noguchi H, Tanano R, Yamanaka E, Takeda A, Tamura K, Aoki H, Sugimoto T, Sasada H, Maeda T, Minato S, Yamamoto S, Inui H, Kagawa T, Yoshida A, Mineda A, Nii M, Kinouchi R, Yoshida K, Yamamoto Y, Kaji T. Age-Dependent Changes in the Effects of Androgens on Female Metabolic and Body Weight Regulation Systems in Humans and Laboratory Animals. Int J Mol Sci 2023; 24:16567. [PMID: 38068890 PMCID: PMC10706411 DOI: 10.3390/ijms242316567] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2023] [Revised: 11/17/2023] [Accepted: 11/19/2023] [Indexed: 12/18/2023] Open
Abstract
In recent years, the effects of androgens on metabolic and body weight regulation systems and their underlying mechanisms have been gradually revealed in females. In women and experimental animals of reproductive age, androgen excess can adversely affect metabolic functioning, appetite, and body weight regulation. In addition, excess androgens can increase the risk of metabolic disorders, such as obesity, insulin resistance, and diabetes. These unfavorable effects of androgens are induced by alterations in the actions of hypothalamic appetite-regulatory factors, reductions in energy expenditure, insulin resistance in skeletal muscle, and β-cell dysfunction. Interestingly, these unfavorable effects of androgens on metabolic and body-weight regulation systems are neither observed nor evident in ovariectomized animals and post-menopausal women, indicating that the adverse effects of androgens might be dependent on the estrogen milieu. Recent findings may provide novel sex- and age-specific strategies for treating metabolic diseases.
Collapse
Affiliation(s)
- Takeshi Iwasa
- Department of Obstetrics and Gynecology, Institute of Biomedical Sciences, Tokushima University Graduate School, 3-18-15 Kuramoto-Cho, Tokushima 770-8503, Japan; (H.N.); (R.T.); (E.Y.); (A.T.); (K.T.); (H.A.); (T.S.); (H.S.); (T.M.); (S.M.); (S.Y.); (H.I.); (T.K.); (A.Y.); (A.M.); (M.N.); (R.K.); (K.Y.); (Y.Y.); (T.K.)
| | - Hiroki Noguchi
- Department of Obstetrics and Gynecology, Institute of Biomedical Sciences, Tokushima University Graduate School, 3-18-15 Kuramoto-Cho, Tokushima 770-8503, Japan; (H.N.); (R.T.); (E.Y.); (A.T.); (K.T.); (H.A.); (T.S.); (H.S.); (T.M.); (S.M.); (S.Y.); (H.I.); (T.K.); (A.Y.); (A.M.); (M.N.); (R.K.); (K.Y.); (Y.Y.); (T.K.)
| | - Risa Tanano
- Department of Obstetrics and Gynecology, Institute of Biomedical Sciences, Tokushima University Graduate School, 3-18-15 Kuramoto-Cho, Tokushima 770-8503, Japan; (H.N.); (R.T.); (E.Y.); (A.T.); (K.T.); (H.A.); (T.S.); (H.S.); (T.M.); (S.M.); (S.Y.); (H.I.); (T.K.); (A.Y.); (A.M.); (M.N.); (R.K.); (K.Y.); (Y.Y.); (T.K.)
| | - Erika Yamanaka
- Department of Obstetrics and Gynecology, Institute of Biomedical Sciences, Tokushima University Graduate School, 3-18-15 Kuramoto-Cho, Tokushima 770-8503, Japan; (H.N.); (R.T.); (E.Y.); (A.T.); (K.T.); (H.A.); (T.S.); (H.S.); (T.M.); (S.M.); (S.Y.); (H.I.); (T.K.); (A.Y.); (A.M.); (M.N.); (R.K.); (K.Y.); (Y.Y.); (T.K.)
| | - Asuka Takeda
- Department of Obstetrics and Gynecology, Institute of Biomedical Sciences, Tokushima University Graduate School, 3-18-15 Kuramoto-Cho, Tokushima 770-8503, Japan; (H.N.); (R.T.); (E.Y.); (A.T.); (K.T.); (H.A.); (T.S.); (H.S.); (T.M.); (S.M.); (S.Y.); (H.I.); (T.K.); (A.Y.); (A.M.); (M.N.); (R.K.); (K.Y.); (Y.Y.); (T.K.)
| | - Kou Tamura
- Department of Obstetrics and Gynecology, Institute of Biomedical Sciences, Tokushima University Graduate School, 3-18-15 Kuramoto-Cho, Tokushima 770-8503, Japan; (H.N.); (R.T.); (E.Y.); (A.T.); (K.T.); (H.A.); (T.S.); (H.S.); (T.M.); (S.M.); (S.Y.); (H.I.); (T.K.); (A.Y.); (A.M.); (M.N.); (R.K.); (K.Y.); (Y.Y.); (T.K.)
| | - Hidenori Aoki
- Department of Obstetrics and Gynecology, Institute of Biomedical Sciences, Tokushima University Graduate School, 3-18-15 Kuramoto-Cho, Tokushima 770-8503, Japan; (H.N.); (R.T.); (E.Y.); (A.T.); (K.T.); (H.A.); (T.S.); (H.S.); (T.M.); (S.M.); (S.Y.); (H.I.); (T.K.); (A.Y.); (A.M.); (M.N.); (R.K.); (K.Y.); (Y.Y.); (T.K.)
| | - Tatsuro Sugimoto
- Department of Obstetrics and Gynecology, Institute of Biomedical Sciences, Tokushima University Graduate School, 3-18-15 Kuramoto-Cho, Tokushima 770-8503, Japan; (H.N.); (R.T.); (E.Y.); (A.T.); (K.T.); (H.A.); (T.S.); (H.S.); (T.M.); (S.M.); (S.Y.); (H.I.); (T.K.); (A.Y.); (A.M.); (M.N.); (R.K.); (K.Y.); (Y.Y.); (T.K.)
| | - Hikari Sasada
- Department of Obstetrics and Gynecology, Institute of Biomedical Sciences, Tokushima University Graduate School, 3-18-15 Kuramoto-Cho, Tokushima 770-8503, Japan; (H.N.); (R.T.); (E.Y.); (A.T.); (K.T.); (H.A.); (T.S.); (H.S.); (T.M.); (S.M.); (S.Y.); (H.I.); (T.K.); (A.Y.); (A.M.); (M.N.); (R.K.); (K.Y.); (Y.Y.); (T.K.)
| | - Takaaki Maeda
- Department of Obstetrics and Gynecology, Institute of Biomedical Sciences, Tokushima University Graduate School, 3-18-15 Kuramoto-Cho, Tokushima 770-8503, Japan; (H.N.); (R.T.); (E.Y.); (A.T.); (K.T.); (H.A.); (T.S.); (H.S.); (T.M.); (S.M.); (S.Y.); (H.I.); (T.K.); (A.Y.); (A.M.); (M.N.); (R.K.); (K.Y.); (Y.Y.); (T.K.)
| | - Saki Minato
- Department of Obstetrics and Gynecology, Institute of Biomedical Sciences, Tokushima University Graduate School, 3-18-15 Kuramoto-Cho, Tokushima 770-8503, Japan; (H.N.); (R.T.); (E.Y.); (A.T.); (K.T.); (H.A.); (T.S.); (H.S.); (T.M.); (S.M.); (S.Y.); (H.I.); (T.K.); (A.Y.); (A.M.); (M.N.); (R.K.); (K.Y.); (Y.Y.); (T.K.)
| | - Shota Yamamoto
- Department of Obstetrics and Gynecology, Institute of Biomedical Sciences, Tokushima University Graduate School, 3-18-15 Kuramoto-Cho, Tokushima 770-8503, Japan; (H.N.); (R.T.); (E.Y.); (A.T.); (K.T.); (H.A.); (T.S.); (H.S.); (T.M.); (S.M.); (S.Y.); (H.I.); (T.K.); (A.Y.); (A.M.); (M.N.); (R.K.); (K.Y.); (Y.Y.); (T.K.)
- Department of Renal and Genitourinary Surgery, Graduate School of Medicine, Hokkaido University, Sapporo 060-0808, Japan
| | - Hiroaki Inui
- Department of Obstetrics and Gynecology, Institute of Biomedical Sciences, Tokushima University Graduate School, 3-18-15 Kuramoto-Cho, Tokushima 770-8503, Japan; (H.N.); (R.T.); (E.Y.); (A.T.); (K.T.); (H.A.); (T.S.); (H.S.); (T.M.); (S.M.); (S.Y.); (H.I.); (T.K.); (A.Y.); (A.M.); (M.N.); (R.K.); (K.Y.); (Y.Y.); (T.K.)
| | - Tomohiro Kagawa
- Department of Obstetrics and Gynecology, Institute of Biomedical Sciences, Tokushima University Graduate School, 3-18-15 Kuramoto-Cho, Tokushima 770-8503, Japan; (H.N.); (R.T.); (E.Y.); (A.T.); (K.T.); (H.A.); (T.S.); (H.S.); (T.M.); (S.M.); (S.Y.); (H.I.); (T.K.); (A.Y.); (A.M.); (M.N.); (R.K.); (K.Y.); (Y.Y.); (T.K.)
| | - Atsuko Yoshida
- Department of Obstetrics and Gynecology, Institute of Biomedical Sciences, Tokushima University Graduate School, 3-18-15 Kuramoto-Cho, Tokushima 770-8503, Japan; (H.N.); (R.T.); (E.Y.); (A.T.); (K.T.); (H.A.); (T.S.); (H.S.); (T.M.); (S.M.); (S.Y.); (H.I.); (T.K.); (A.Y.); (A.M.); (M.N.); (R.K.); (K.Y.); (Y.Y.); (T.K.)
| | - Ayuka Mineda
- Department of Obstetrics and Gynecology, Institute of Biomedical Sciences, Tokushima University Graduate School, 3-18-15 Kuramoto-Cho, Tokushima 770-8503, Japan; (H.N.); (R.T.); (E.Y.); (A.T.); (K.T.); (H.A.); (T.S.); (H.S.); (T.M.); (S.M.); (S.Y.); (H.I.); (T.K.); (A.Y.); (A.M.); (M.N.); (R.K.); (K.Y.); (Y.Y.); (T.K.)
| | - Mari Nii
- Department of Obstetrics and Gynecology, Institute of Biomedical Sciences, Tokushima University Graduate School, 3-18-15 Kuramoto-Cho, Tokushima 770-8503, Japan; (H.N.); (R.T.); (E.Y.); (A.T.); (K.T.); (H.A.); (T.S.); (H.S.); (T.M.); (S.M.); (S.Y.); (H.I.); (T.K.); (A.Y.); (A.M.); (M.N.); (R.K.); (K.Y.); (Y.Y.); (T.K.)
| | - Riyo Kinouchi
- Department of Obstetrics and Gynecology, Institute of Biomedical Sciences, Tokushima University Graduate School, 3-18-15 Kuramoto-Cho, Tokushima 770-8503, Japan; (H.N.); (R.T.); (E.Y.); (A.T.); (K.T.); (H.A.); (T.S.); (H.S.); (T.M.); (S.M.); (S.Y.); (H.I.); (T.K.); (A.Y.); (A.M.); (M.N.); (R.K.); (K.Y.); (Y.Y.); (T.K.)
| | - Kanako Yoshida
- Department of Obstetrics and Gynecology, Institute of Biomedical Sciences, Tokushima University Graduate School, 3-18-15 Kuramoto-Cho, Tokushima 770-8503, Japan; (H.N.); (R.T.); (E.Y.); (A.T.); (K.T.); (H.A.); (T.S.); (H.S.); (T.M.); (S.M.); (S.Y.); (H.I.); (T.K.); (A.Y.); (A.M.); (M.N.); (R.K.); (K.Y.); (Y.Y.); (T.K.)
| | - Yuri Yamamoto
- Department of Obstetrics and Gynecology, Institute of Biomedical Sciences, Tokushima University Graduate School, 3-18-15 Kuramoto-Cho, Tokushima 770-8503, Japan; (H.N.); (R.T.); (E.Y.); (A.T.); (K.T.); (H.A.); (T.S.); (H.S.); (T.M.); (S.M.); (S.Y.); (H.I.); (T.K.); (A.Y.); (A.M.); (M.N.); (R.K.); (K.Y.); (Y.Y.); (T.K.)
| | - Takashi Kaji
- Department of Obstetrics and Gynecology, Institute of Biomedical Sciences, Tokushima University Graduate School, 3-18-15 Kuramoto-Cho, Tokushima 770-8503, Japan; (H.N.); (R.T.); (E.Y.); (A.T.); (K.T.); (H.A.); (T.S.); (H.S.); (T.M.); (S.M.); (S.Y.); (H.I.); (T.K.); (A.Y.); (A.M.); (M.N.); (R.K.); (K.Y.); (Y.Y.); (T.K.)
| |
Collapse
|
|
3
|
Nyema NT, McKnight AD, Vargas-Elvira AG, Schneps HM, Gold EG, Myers KP, Alhadeff AL. AgRP neuron activity promotes associations between sensory and nutritive signals to guide flavor preference. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2023:2023.09.19.558483. [PMID: 37786670 PMCID: PMC10541598 DOI: 10.1101/2023.09.19.558483] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/04/2023]
Abstract
Objective The learned associations between sensory cues (e.g., taste, smell) and nutritive value (e.g., calories, post-ingestive signaling) of foods powerfully influences our eating behavior [1], but the neural circuits that mediate these associations are not well understood. Here, we examined the role of agouti-related protein (AgRP)-expressing neurons - neurons which are critical drivers of feeding behavior [2; 3] - in mediating flavor-nutrient learning (FNL). Methods Because mice prefer flavors associated with AgRP neuron activity suppression [4], we examined how optogenetic stimulation of AgRP neurons during intake influences FNL, and used fiber photometry to determine how endogenous AgRP neuron activity tracks associations between flavors and nutrients. Results We unexpectedly found that tonic activity in AgRP neurons during FNL potentiated, rather than prevented, the development of flavor preferences. There were notable sex differences in the mechanisms for this potentiation. Specifically, in male mice, AgRP neuron activity increased flavor consumption during FNL training, thereby strengthening the association between flavors and nutrients. In female mice, AgRP neuron activity enhanced flavor-nutrient preferences independently of consumption during training, suggesting that AgRP neuron activity enhances the reward value of the nutrient-paired flavor. Finally, in vivo neural activity analyses demonstrated that acute AgRP neuron dynamics track the association between flavors and nutrients in both sexes. Conclusions Overall, these data (1) demonstrate that AgRP neuron activity enhances associations between flavors and nutrients in a sex-dependent manner and (2) reveal that AgRP neurons track and update these associations on fast timescales. Taken together, our findings provide new insight into the role of AgRP neurons in assimilating sensory and nutritive signals for food reinforcement.
Collapse
Affiliation(s)
- Nathaniel T. Nyema
- Monell Chemical Senses Center, Philadelphia PA 19104, USA
- University of Pennsylvania, Philadelphia PA 19104, USA
| | - Aaron D. McKnight
- Monell Chemical Senses Center, Philadelphia PA 19104, USA
- University of Pennsylvania, Philadelphia PA 19104, USA
| | | | - Heather M. Schneps
- Monell Chemical Senses Center, Philadelphia PA 19104, USA
- University of Pennsylvania, Philadelphia PA 19104, USA
| | | | | | - Amber L. Alhadeff
- Monell Chemical Senses Center, Philadelphia PA 19104, USA
- University of Pennsylvania, Philadelphia PA 19104, USA
| |
Collapse
|
|
4
|
Haspula D, Cui Z. Neurochemical Basis of Inter-Organ Crosstalk in Health and Obesity: Focus on the Hypothalamus and the Brainstem. Cells 2023; 12:1801. [PMID: 37443835 PMCID: PMC10341274 DOI: 10.3390/cells12131801] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2023] [Revised: 06/23/2023] [Accepted: 07/03/2023] [Indexed: 07/15/2023] Open
Abstract
Precise neural regulation is required for maintenance of energy homeostasis. Essential to this are the hypothalamic and brainstem nuclei which are located adjacent and supra-adjacent to the circumventricular organs. They comprise multiple distinct neuronal populations which receive inputs not only from other brain regions, but also from circulating signals such as hormones, nutrients, metabolites and postprandial signals. Hence, they are ideally placed to exert a multi-tier control over metabolism. The neuronal sub-populations present in these key metabolically relevant nuclei regulate various facets of energy balance which includes appetite/satiety control, substrate utilization by peripheral organs and glucose homeostasis. In situations of heightened energy demand or excess, they maintain energy homeostasis by restoring the balance between energy intake and expenditure. While research on the metabolic role of the central nervous system has progressed rapidly, the neural circuitry and molecular mechanisms involved in regulating distinct metabolic functions have only gained traction in the last few decades. The focus of this review is to provide an updated summary of the mechanisms by which the various neuronal subpopulations, mainly located in the hypothalamus and the brainstem, regulate key metabolic functions.
Collapse
Affiliation(s)
- Dhanush Haspula
- Molecular Signaling Section, Laboratory of Bioorganic Chemistry, National Institute of Diabetes and Digestive and Kidney Diseases, Bethesda, MD 20892, USA
| | - Zhenzhong Cui
- Mouse Metabolism Core, National Institute of Diabetes and Digestive and Kidney Diseases, Bethesda, MD 20892, USA;
| |
Collapse
|
|
5
|
Si R, Pan D, Wang Z, Chen Y, Cao J. Regulation of the central melanocortin system on energy balance in mammals and birds. Neuropeptides 2022; 95:102267. [PMID: 35752067 DOI: 10.1016/j.npep.2022.102267] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/01/2021] [Revised: 06/11/2022] [Accepted: 06/13/2022] [Indexed: 11/24/2022]
Abstract
Agouti-related protein/neuropeptide Y (AgRP/NPY) neurons promote feeding, while proopiomelanocortin/cocaine- and amphetamine-regulated transcript (POMC/CART) neurons and melanocortin receptor neurons inhibit feeding; these three types of neurons play vital roles in regulating feeding. The central melanocortin system composed of these neurons is critical for the regulation of food intake and energy metabolism. It regulates energy intake and consumption by activating or inhibiting the activities of AgRP/NPY neurons and POMC/CART neurons and then affects the feeding behaviour of animals to maintain the energy balance. Meanwhile, organisms can also positively or negatively regulate energy homeostasis through the negative feedback of the neuron system. With further studies, understanding of the process and factors involved in the energy balance regulation of mammals and birds can be improved, which will provide a favourable scientific basis to reduce costs and improve meat production in production and breeding.
Collapse
Affiliation(s)
- Rongrong Si
- Laboratory of Anatomy of Domestic Animals, College of Veterinary Medicine, China Agricultural University, Haidian, Beijing 100193, China
| | - Deng Pan
- Laboratory of Anatomy of Domestic Animals, College of Veterinary Medicine, China Agricultural University, Haidian, Beijing 100193, China
| | - Zixu Wang
- Laboratory of Anatomy of Domestic Animals, College of Veterinary Medicine, China Agricultural University, Haidian, Beijing 100193, China
| | - Yaoxing Chen
- Laboratory of Anatomy of Domestic Animals, College of Veterinary Medicine, China Agricultural University, Haidian, Beijing 100193, China
| | - Jing Cao
- Laboratory of Anatomy of Domestic Animals, College of Veterinary Medicine, China Agricultural University, Haidian, Beijing 100193, China.
| |
Collapse
|
|
6
|
Jiao Y, Wilson PW, Reid AMA, Dunn IC. The expression of the gastrin/cholecystokinin (GAST/CCK) family and their receptors (CCKAR/CCKBR) in the chicken changes in response to quantitative restriction and reveals a functional role of CCK in the crop. Gen Comp Endocrinol 2022; 321-322:114024. [PMID: 35292263 DOI: 10.1016/j.ygcen.2022.114024] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/08/2021] [Revised: 02/07/2022] [Accepted: 03/10/2022] [Indexed: 11/04/2022]
Abstract
Gastrin and cholecystokinin peptides bind a common G-protein coupled receptor, cholecystokinin receptor B (CCKBR) whilst cholecystokinin receptor A (CCKAR) is preferentially bound by CCK. Gastrin and cholecystokinin mediate signalling from the gastrointestinal tract to regulate appetite and digestive function. In this study, expression of the cholecystokinin/gastrin family and distribution of their receptors expression was measured to understand the target organs for the peptides and how expression responds to changes in food intake. We confirmed the restricted expression of gastrin in the antrum and the abundant expression of cholecystokinin in the hypothalamus. The expression of gastrin in the antrum was significantly elevated in broiler breeders when released from feed restriction. CCKBR was most abundant in the hypothalamus and proventriculus. CCKAR was most abundant in the pancreas and crop, more than tenfold greater than the gastrointestinal tract. Cholecystokinin expression in the pancreas increased after removal of food restriction. CCKAR in the gastrointestinal tract peaks around the distal ileum, distal to the peak of cholecystokinin expression. There was virtually no cholecystokinin expression in the caecum but CCKAR expression was high. The CCKAR expression in the crop was unexpected, supporting a role of cholecystokinin in mediating crop emptying which was supported by the observation of in-vitro contraction after cholecystokinin administration. The response to changes in food intake and the expression pattern of the cholecystokinin/gastrin family and their receptors will stimulate and inform new hypotheses on their role in growth in poultry.
Collapse
Affiliation(s)
- Yuping Jiao
- The Roslin Institute, University of Edinburgh, EH25 9RG Scotland, UK.
| | - Peter W Wilson
- The Roslin Institute, University of Edinburgh, EH25 9RG Scotland, UK.
| | - Angus M A Reid
- The Roslin Institute, University of Edinburgh, EH25 9RG Scotland, UK.
| | - Ian C Dunn
- The Roslin Institute, University of Edinburgh, EH25 9RG Scotland, UK.
| |
Collapse
|
|
7
|
Dixon LM, Dunn IC, Brocklehurst S, Baker L, Boswell T, Caughey SD, Reid A, Sandilands V, Wilson PW, D'Eath RB. The effects of feed restriction, time of day and time since feeding on behavioral and physiological indicators of hunger in broiler breeder hens. Poult Sci 2022; 101:101838. [PMID: 35378348 PMCID: PMC8983422 DOI: 10.1016/j.psj.2022.101838] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2021] [Revised: 03/02/2022] [Accepted: 03/02/2022] [Indexed: 11/05/2022] Open
Abstract
Broiler breeder chickens are commercially feed restricted to slow their growth and improve their health and production, however, there is research demonstrating that this leads to chronic hunger resulting in poor welfare. A challenge in these studies is to account for possible daily rhythms or the effects of time since last meal on measures relating hunger. To address this, we used 3 feed treatments: AL (ad libitum fed), Ram (restricted, fed in the morning), and Rpm (restricted, fed in the afternoon) to control for diurnal effects. We then conducted foraging motivation tests and collected home pen behavior and physiological samples at 4 times relative to feeding throughout a 24-h period. The feed treatment had the largest influence on the data, with AL birds weighing more, having lower concentrations of plasma NEFA, and mRNA expression of AGRP and NPY alongside higher expression of POMC in the basal hypothalamus than Ram or Rpm birds (P < 0.001). R birds were more successful at and had a shorter latency to complete the motivation test, and did more walking and less feeding than AL birds in the home pen (P < 0.01). There was little effect of time since last meal on many measures (P > 0.05) but AGRP expression was highest in the basal hypothalamus shortly after a meal (P < 0.05), blood plasma NEFA was higher in R birds just before feeding (P < 0.001) and glucose was higher in Ram birds just after feeding (P < 0.001), and the latency to complete the motivation test was shortest before the next meal (P < 0.05). Time of day effects were mainly found in the difference in activity levels in the home pen when during lights on and lights off periods. In conclusion, many behavioral and physiological hunger measures were not significantly influenced by time of day or time since the last meal. For the measures that do change, future studies should be designed so that sampling is balanced in such a way as to minimize bias due to these effects.
Collapse
|
|
8
|
Dunn IC, De Koning DJ, McCormack HA, Fleming RH, Wilson PW, Andersson B, Schmutz M, Benavides C, Dominguez-Gasca N, Sanchez-Rodriguez E, Rodriguez-Navarro AB. No evidence that selection for egg production persistency causes loss of bone quality in laying hens. Genet Sel Evol 2021; 53:11. [PMID: 33541269 PMCID: PMC7860618 DOI: 10.1186/s12711-021-00603-8] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2020] [Accepted: 01/13/2021] [Indexed: 02/05/2023] Open
Abstract
Background The physiological adaptations that have evolved for egg laying make hens susceptible to bone fractures and keel bone damage. In modern laying hen breeds, longer periods of egg laying could result in a greater risk of poor bone quality, and selection for increased egg production has frequently been stated to be a cause. However, the existing literature does not support this hypothesis. To test the hypothesis that egg production is associated with quality, breaking strength and density of bone, genetic correlations between these traits were estimated in White Leghorn and Rhode Island Red breeds. Genetic correlations of cortical and medullary bone material chemical properties with bone quality were also estimated, in order to identify methods to improve bone quality with appropriately targeted measurement of key traits. Results Estimates of heritability for bone quality traits were moderate (0.19–0.59) for both White Leghorn and Rhode Island Red breeds, except for the keel bone trait, which had a heritability estimate equal to zero. There was no evidence for genetic or phenotypic relationships between post-peak egg production and bone quality. In the White Leghorn breed, the estimate of the genetic correlation between pre-peak production/age at first egg and bone quality was significant and negative (− 0.7 to − 0.4). Estimates of heritability of thermogravimetric measurements of tibial medullary bone mineralisation were significant (0.18–0.41), as were estimates of their genetic correlations with tibia breaking strength and density (0.6–0.9). Conclusions The low genetic correlation of post-peak egg production with bone quality suggests that selection for increased persistency of egg production may not adversely affect bone quality. Onset of puberty and mineralisation of the medullary bone, which is a specialised adaptation for egg laying, were identified as important factors associated with the quality of the skeleton later during egg production. These are traits for which genetic, as well as environmental and management factors can positively impact the overall quality of the skeleton of laying hens.
Collapse
Affiliation(s)
- Ian C Dunn
- The Roslin Institute, University of Edinburgh, EH25 9RG, Edinburgh, Scotland, UK.
| | | | - Heather A McCormack
- The Roslin Institute, University of Edinburgh, EH25 9RG, Edinburgh, Scotland, UK
| | - Robert H Fleming
- The Roslin Institute, University of Edinburgh, EH25 9RG, Edinburgh, Scotland, UK
| | - Peter W Wilson
- The Roslin Institute, University of Edinburgh, EH25 9RG, Edinburgh, Scotland, UK
| | | | | | - Cristina Benavides
- Departamento de Mineralogía Y Petrologia, Universidad de Granada, 18002, Granada, Spain
| | | | | | | |
Collapse
|
|
9
|
Singh O, Agarwal N, Yadav A, Basu S, Malik S, Rani S, Kumar V, Singru PS. Concurrent changes in photoperiod-induced seasonal phenotypes and hypothalamic CART peptide-containing systems in night-migratory redheaded buntings. Brain Struct Funct 2020; 225:2775-2798. [PMID: 33141294 PMCID: PMC7608113 DOI: 10.1007/s00429-020-02154-y] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2020] [Accepted: 10/04/2020] [Indexed: 12/18/2022]
Abstract
This study tested the hypothesis whether hypothalamic cocaine-and amphetamine-regulated transcript (CART)-containing systems were involved in photoperiod-induced responses associated with spring migration (hyperphagia and weight gain) and reproduction (gonadal maturation) in migratory songbirds. We specifically chose CART to examine neural mechanism(s) underlying photoperiod-induced responses, since it is a potent anorectic neuropeptide and involved in the regulation of changes in the body mass and reproduction in mammals. We first studied the distribution of CART-immunoreactivity in the hypothalamus of migratory redheaded buntings (Emberiza bruniceps). CART-immunoreactive neurons were found extensively distributed in the preoptic, lateral hypothalamic (LHN), anterior hypothalamic (AN), suprachiasmatic (SCN), paraventricular (PVN), dorsomedialis hypothalami (DMN), inferior hypothalamic (IH), and infundibular (IN) nuclei. Then, we correlated hypothalamic CART-immunoreactivity in buntings with photostimulated seasonal states, particularly winter non-migratory/non-breeding (NMB) state under short days, and spring premigratory/pre-breeding (PMB) and migratory/breeding (MB) states under long days. There were significantly increased CART-immunoreactive cells, and percent fluorescent area of CART-immunoreactivity was significantly increased in all mapped hypothalamic areas, except the SCN, PVN, AN, and DMN in photostimulated PMB and MB states, as compared to the non-stimulated NMB state. In particular, CART was richly expressed in the medial preoptic nucleus, LHN, IH and IN during MB state in which buntings showed reduced food intake and increased night-time activity. These results suggest that changes in the activity of the CART-containing system in different brain regions were associated with heightened energy needs of the photoperiod-induced seasonal responses during spring migration and reproduction in migratory songbirds.
Collapse
Affiliation(s)
- Omprakash Singh
- School of Biological Sciences, National Institute of Science Education and Research (NISER), Bhubaneswar, Jatni, Khurda, 752050, Odisha, India.,Homi Bhabha National Institute, Training School Complex, Anushakti Nagar, Mumbai, 400094, India
| | - Neha Agarwal
- Department of Zoology, University of Lucknow, Lucknow, 226007, India.,Department of Zoology, University of Delhi, Delhi, 110007, India
| | - Anupama Yadav
- Department of Zoology, University of Lucknow, Lucknow, 226007, India
| | - Sumela Basu
- School of Biological Sciences, National Institute of Science Education and Research (NISER), Bhubaneswar, Jatni, Khurda, 752050, Odisha, India.,Homi Bhabha National Institute, Training School Complex, Anushakti Nagar, Mumbai, 400094, India
| | - Shalie Malik
- Department of Zoology, University of Lucknow, Lucknow, 226007, India
| | - Sangeeta Rani
- Department of Zoology, University of Lucknow, Lucknow, 226007, India
| | - Vinod Kumar
- Department of Zoology, University of Delhi, Delhi, 110007, India.
| | - Praful S Singru
- School of Biological Sciences, National Institute of Science Education and Research (NISER), Bhubaneswar, Jatni, Khurda, 752050, Odisha, India. .,Homi Bhabha National Institute, Training School Complex, Anushakti Nagar, Mumbai, 400094, India.
| |
Collapse
|
|
10
|
Van Limbergen T, Sarrazin S, Chantziaras I, Dewulf J, Ducatelle R, Kyriazakis I, McMullin P, Méndez J, Niemi JK, Papasolomontos S, Szeleszczuk P, Van Erum J, Maes D. Risk factors for poor health and performance in European broiler production systems. BMC Vet Res 2020; 16:287. [PMID: 32787841 PMCID: PMC7425143 DOI: 10.1186/s12917-020-02484-3] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2019] [Accepted: 07/22/2020] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Conventional broilers are currently one of the most efficient protein converters. Although decades of progress in genetic selection and feed formulation have lead to high standards of efficient broiler production, still a lot of variability is found between farms and between successive flocks. The aim of this study was to investigate risk- and/or protective factors for poor health and performance in conventional broiler-farms in Europe by developing eight multivariable linear mixed models. Three different models were used to investigate mortality (overall, first week, after first week), three models for performance variables (growth, feed conversion, European production index) and two models were related to slaughterhouse data (i.e. dead on arrival and condemnation rate). RESULTS Several factors related to management and housing were significantly associated with health and performance of broilers. The following factors were associated with increased mortality: floor quality, neonatal septicemia, ventilation type and other professional activities of the farmer. The factors associated with performance were chick sex, coccidiosis infections, necrotic enteritis, dysbacteriosis, light intensity adaptations, ventilation type, comparing daily flock results with previous flock results by farmer, daily check of feed and water system and type of feed. For dead on arrival three risk factors were identified i.e. daily growth, type of light adaptation and type of drinkers system. For condemnation rate seven risk factors were found, i.e. type of drinking system, daily growth, feed withdrawal time, type of ventilation, house size, septicemia after seven days and type of feed. CONCLUSIONS These results imply that a multifactorial approach is required with adaptations involving both improvements in management, housing, health programs and an increasing level of professionalism of the farmer in order to improve broiler performance and health.
Collapse
Affiliation(s)
- Tommy Van Limbergen
- Department of Reproduction, Obstetrics and Herd Health, Faculty of Veterinary Medicine, Ghent University, Salisburylaan 133, 9820, Merelbeke, Belgium. .,PEHESTAT BVBA, Dwarsstraat 3, 3560, Lummen, Belgium.
| | - Steven Sarrazin
- Department of Reproduction, Obstetrics and Herd Health, Faculty of Veterinary Medicine, Ghent University, Salisburylaan 133, 9820, Merelbeke, Belgium
| | - Ilias Chantziaras
- Department of Reproduction, Obstetrics and Herd Health, Faculty of Veterinary Medicine, Ghent University, Salisburylaan 133, 9820, Merelbeke, Belgium
| | - Jeroen Dewulf
- Department of Reproduction, Obstetrics and Herd Health, Faculty of Veterinary Medicine, Ghent University, Salisburylaan 133, 9820, Merelbeke, Belgium
| | - Richard Ducatelle
- Department of Pathology, Bacteriology and Poultry Diseases, Faculty of Veterinary Medicine, Ghent University, Salisburylaan 133, 9820, Merelbeke, Belgium
| | - Ilias Kyriazakis
- Agriculture, School of Natural and Environmental Sciences, Newcastle University, Newcastle upon Tyne, NE1 7RU, UK
| | - Paul McMullin
- Poultry Health Services International, 4 Cocked Hat Park, Sowerby, Thirsk, North Yorkshire, YO7 3HB, United Kingdom
| | - Jesús Méndez
- Cooperativas Orensanas S.C.G, Santa Cruz de Arrabaldo, s/n, 32990, Ourense, Spain
| | - Jarkko K Niemi
- Natural Resources Institute Finland (Luke), Kampusranta 9, FI-60320, Seinäjoki, Finland
| | - Sotiris Papasolomontos
- Vitatrace Nutrition Ltd., Propylaion 18, Strovolos Industrial Estate, 2033, Nicosia, Cyprus
| | - Piotr Szeleszczuk
- Department of Pathology and Veterinary Diagnostics, Division of Avian Diseases, Warsaw University of Life Sciences (SGGW), Nowoursynowska 166, 02-787, Warszawa, Poland
| | | | - Dominiek Maes
- Department of Reproduction, Obstetrics and Herd Health, Faculty of Veterinary Medicine, Ghent University, Salisburylaan 133, 9820, Merelbeke, Belgium
| | | |
Collapse
|
|
11
|
Wang Z, do Carmo JM, da Silva AA, Bailey KC, Aberdein N, Moak SP, Hall JE. Role of SOCS3 in POMC neurons in metabolic and cardiovascular regulation. Am J Physiol Regul Integr Comp Physiol 2019; 316:R338-R351. [PMID: 30673296 PMCID: PMC6483217 DOI: 10.1152/ajpregu.00163.2018] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2018] [Revised: 01/16/2019] [Accepted: 01/17/2019] [Indexed: 02/08/2023]
Abstract
Suppressor of cytokine signaling 3 (SOCS3) is a negative regulator of leptin signaling. We previously showed that the chronic effects of leptin on blood pressure (BP) and glucose regulation are mediated by stimulation of proopiomelanocortin (POMC) neurons. In this study we examined the importance of endogenous SOCS3 in POMC neurons in control of metabolic and cardiovascular function and potential sex differences. Male and female SOCS3flox/flox/POMC-Cre mice in which SOCS3 was selectively deleted in POMC neurons and control SOCS3flox/flox mice were studied during a control diet (CD) or a high-fat diet (HFD) and during chronic leptin infusion. Body weight was lower in male and female SOCS3flox/flox/POMC-Cre than control mice fed the CD, despite similar food intake. Male SOCS3flox/flox/POMC-Cre mice exhibited increased energy expenditure. BP and heart rate were similar in male and female SOCS3flox/flox/POMC-Cre and control mice fed the CD. HFD-fed male and female SOCS3flox/flox/POMC-Cre mice showed attenuated weight gain. HFD-induced elevations in baseline BP and BP responses to an air-jet stress test were greater in female SOCS3flox/flox/POMC-Cre than control mice. Chronic leptin infusion produced similar responses for food intake, body weight, oxygen consumption, blood glucose, BP, and heart rate in all groups. Thus SOCS3 deficiency in POMC neurons influences body weight regulation in the setting of CD and HFD and differentially affects BP and energy balance in a sex-specific manner but does not amplify the dietary, glycemic, or cardiovascular effects of leptin.
Collapse
Affiliation(s)
- Zhen Wang
- Department of Physiology and Biophysics, University of Mississippi Medical Center , Jackson, Mississippi
- Mississippi Center for Obesity Research, University of Mississippi Medical Center , Jackson, Mississippi
| | - Jussara M do Carmo
- Department of Physiology and Biophysics, University of Mississippi Medical Center , Jackson, Mississippi
- Mississippi Center for Obesity Research, University of Mississippi Medical Center , Jackson, Mississippi
| | - Alexandre A da Silva
- Department of Physiology and Biophysics, University of Mississippi Medical Center , Jackson, Mississippi
- Mississippi Center for Obesity Research, University of Mississippi Medical Center , Jackson, Mississippi
| | - Kandice C Bailey
- Department of Physiology and Biophysics, University of Mississippi Medical Center , Jackson, Mississippi
- Mississippi Center for Obesity Research, University of Mississippi Medical Center , Jackson, Mississippi
| | - Nicola Aberdein
- Biomolecular Science Research Centre, Sheffield Hallam University , Sheffield , United Kingdom
| | - Sydney P Moak
- Department of Physiology and Biophysics, University of Mississippi Medical Center , Jackson, Mississippi
- Mississippi Center for Obesity Research, University of Mississippi Medical Center , Jackson, Mississippi
| | - John E Hall
- Department of Physiology and Biophysics, University of Mississippi Medical Center , Jackson, Mississippi
- Mississippi Center for Obesity Research, University of Mississippi Medical Center , Jackson, Mississippi
| |
Collapse
|