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Rastogi S, Haldar C. Seasonal plasticity in immunocompetent cytokines (IL-2, IL-6, and TNF-α), myeloid progenitor cell (CFU-GM) proliferation, and LPS-induced oxido-inflammatory aberrations in a tropical rodent Funambulus pennanti: role of melatonin. Cell Stress Chaperones 2023; 28:567-582. [PMID: 36542205 PMCID: PMC10469145 DOI: 10.1007/s12192-022-01313-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2022] [Revised: 11/14/2022] [Accepted: 11/15/2022] [Indexed: 12/24/2022] Open
Abstract
In seasonal breeders, photoperiods regulate the levels of circulatory melatonin, a well-known immunomodulator and an antioxidant. Melatonin is known to play a complex physiological role in maintaining the immune homeostasis by affecting cytokine production in immunocompetent cells. In this study, we have quantified seasonal and temporal variations in immunocompetent cytokines-IL-2, IL-6, and TNF-α-and circulatory corticosterone along with in- vitro proliferation of bone marrow-derived granulocyte macrophage-colony forming unit (CFU-GM) progenitor cells of a tropical seasonal breeder Funambulus pennanti (northern palm squirrel). Transient variations in antioxidant status of seasonal breeders might be due to the fluctuations associated with immunity and inflammation. Further, to establish a direct immunomodulatory effect of photoperiod, we recorded the LPS-induced oxidative and inflammatory responses of squirrels by housing them in artificial photoperiodic chambers mimicking summer and winter seasons respectively. We observed a marked variation in cytokines level, melatonin, and corticosterone , and CFU-GM cell proliferation during summer and winter seasons. High Peripheral melatonin levels directly correlated with cytokine IL-2 levels, and inversely correlated with TNF-α, and circulatory corticosterone level. LPS-challenged squirrels housed in short photoperiod (10L:14D; equivalent to winter days) showed a marked reduction in the components of the inflammatory cascade, CRP, TNF-α, IL-6, NOx, NF-κB, Cox-2, and PGES, with an overall improvement in antioxidant status when compared to squirrels maintained under a long photoperiod (16L:8D; equivalent to summer days). Our results underline the impact of seasonality, photoperiod, and melatonin in maintaining an intrinsic redox-immune homeostasis which helps the animal to withstand environmental stresses.
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Affiliation(s)
- Shraddha Rastogi
- Pineal Research Laboratory, Department of Zoology, Institute of Science, Banaras Hindu University, Varanasi, 221005, India
- Present address: NCI-NIH, Bethesda, MD, USA
| | - Chandana Haldar
- Pineal Research Laboratory, Department of Zoology, Institute of Science, Banaras Hindu University, Varanasi, 221005, India.
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Redox Status and Hematological Variables in Melatonin-Treated Ewes during Early Pregnancy under Heat Stress. Vet Sci 2022; 9:vetsci9090499. [PMID: 36136715 PMCID: PMC9505195 DOI: 10.3390/vetsci9090499] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2022] [Revised: 09/07/2022] [Accepted: 09/09/2022] [Indexed: 11/16/2022] Open
Abstract
The preovulatory follicles and preimplantation stage embryos are found to be rather sensitive to heat stress due to their low potential for scavenging reactive oxygen species (ROS). The aim of the present study was to assess the impact of melatonin administration on redox status and hematological variables during the preovulatory period and early stages of embryogenesis in heat-stressed ewes in vivo. Forty Karagouniko-breed ewes were divided in two groups, the melatonin (M, n = 20) group and control (C, n = 20) one. All animals were subjected to heat stress throughout the study, which lasted forty days (D0 to D40). In M group, melatonin implants were administered on D0. Then, oestrous synchronization was applied (D19-D33). On D34, six rams were introduced into the ewe flock for mating. Ultrasonographic examination was conducted on D73 for pregnancy diagnosis. The temperature humidity index (THI), the rectal temperature (RT), and the number of breaths per minute (BR) were evaluated twice daily. Redox biomarkers, namely total antioxidant capacity (TAC), reduced glutathione (GSH), and thiobarbituric acid reactive substances (TBARS), were assayed in blood samples collected on D0, D33, and D40. In addition, packed cell volume (PCV), white blood cells (WBCs), leukocyte differential count, and cortisol assessment were conducted in blood samples on D33 and D40. The results indicated improved fertility rate and mean number of lambs born per ewe due to improved redox status (p < 0.05) in ewes that received melatonin implants 34 days approximately before the onset of oestrus. The PCV decreased in both groups between the two time-points (p < 0.05). However, the NEU/LYMPH ratio decreased (p < 0.05) only in group M. The low cortisol levels and the decreased NEU/LYMPH ratio in both groups support the hypothesis that ewes of the indigenous Karagouniko breed may exhibit adaptation to environmental thermal stress. The administration of melatonin as an antioxidant regime may improve the reproductive competence of heat stressed ewes and may also enhance their ability to adapt at high ambient temperatures.
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Kravchenko LB, Muraleva NA. Melatonin and Sexual Maturation in Bank (Clethrionomys glareolus) and Grey-Sided (Clethrionomys rufocanus) Voles in Experimental Conditions. BIOL BULL+ 2022. [DOI: 10.1134/s1062359021140107] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Moreira Andraschko M, de Carvalho MT, Cardoso Martins Pires H, de Deus HD, Martí Castelló C, de Menezes LB, Brolo Martins D, Pacheco Miguel M. Melatonin attenuates glucocorticoid effect induced by medroxyprogesterone acetate in rats. Gen Comp Endocrinol 2022; 316:113959. [PMID: 34861281 DOI: 10.1016/j.ygcen.2021.113959] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/02/2021] [Revised: 11/16/2021] [Accepted: 11/28/2021] [Indexed: 11/04/2022]
Abstract
Medroxyprogesterone acetate (MPA) acts on glucocorticoid receptors and, when it is in excess, can cause clinical disorders comparable to hyperadrenocorticism. Melatonin (MEL) is a hormone with potent antioxidant and anti-glucocorticoid activity and it can be beneficial in the excessive activation of glucocorticoid receptors. To evaluate the protective effects of MEL on the glucocorticoid effect of MPA, 34 male Wistar rats were randomized into four groups: CON (control), MEL, MPA, and MPA + MEL. The animals were treated for 28 days, by subcutaneous injection. At the high dose that we used, the MPA caused effects compatible with an excessive activation of glucocorticoid receptors, resulting on a reduction in adrenal size, less weight gain, lower final body weight and feeding efficiency, and fewer lymphocytes compared with the control group. In addition, there was an increase in abdominal fat, cholesterol, very-low-density lipoprotein (VLDL), triglycerides, erythrocytes, hemoglobin, hematocrit, and hepatic vacuolization. We concluded that MEL was effective reducing the mean values of total cholesterol, high-density lipoprotein (HDL), urea, VLDL, triglycerides, hepatic microvacuolization and abdominal fat/weight in rats treated with MPA. These findings indicate that MEL attenuates the harmful effects of MPA.
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Affiliation(s)
| | - Mara Taís de Carvalho
- Mestre e Pós-graduanda em Ciência Animal, Nível doutorado, Escola de Veterinária e Zootecnia, Universidade Federal de Goiás, Brazil
| | | | | | - Carla Martí Castelló
- Mestre e Pós-graduanda em Ciência Animal, Nível doutorado, Escola de Veterinária e Zootecnia, Universidade Federal de Goiás, Brazil
| | - Liliana Borges de Menezes
- Programa de Pós Graduação em Ciência Animal da Escola de Veterinária e Zootecnia e Instituto de Patologia Tropical e Saúde Pública, Universidade Federal de Goiás, Brazil
| | - Danieli Brolo Martins
- Programa de Pós Graduação em Ciência Animal da Escola de Veterinária e Zootecnia, Universidade Federal de Goiás, Brazil
| | - Marina Pacheco Miguel
- Programa de Pós Graduação em Ciência Animal da Escola de Veterinária e Zootecnia e Instituto de Patologia Tropical e Saúde Pública, Universidade Federal de Goiás, Brazil.
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Pal Chowdhury J, Haldar C. Stress associated ovarian dysfunctions in a seasonal breeder Funambulus pennanti: Role of glucocorticoids and possible amelioration by melatonin. Gen Comp Endocrinol 2022; 316:113962. [PMID: 34890689 DOI: 10.1016/j.ygcen.2021.113962] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/08/2021] [Revised: 11/23/2021] [Accepted: 12/02/2021] [Indexed: 01/11/2023]
Abstract
Studies have shown that stress caused by lack of physical activity disrupts the normal pattern of glucocorticoid secretion which adversely affects the reproductive axis. We studied the effect of chronic movement restriction on ovarian responses in the Indian Palm Squirrel Funambulus pennanti, a highly active diurnal rodent. Physical restraint of squirrels induced stress that led to a significant increase in plasma cortisol, corticosterone and decreased 17β-estradiol level leading to follicular atresia. Ovarian Reactive Oxygen Species (ROS) content, lipid peroxidation (LPO), activities of superoxide dismutase (SOD) and catalase (CAT) enzymes increased in restrained squirrels. Elevated ROS increased the oxidative load that led to ovarian cell death as evidenced by increased Bax and decreased Bcl2 expression causing further decline in Aromatase and ERα proteins. To elaborate the mechanism(s) involved in stress induced glucocorticoid mediated oxidative damages to the ovary we extended our study by exposing ovaries in vitro to the synthetic glucocorticoid dexamethasone (200 μM). We observed that glucocorticoid receptor (GR) expression was significantly increased in dexamethasone treated ovaries in vitro with a decrease in expression of Nrf2 and HO-1 proteins. Melatonin supplementation (10 nM) along with dexamethasone significantly decreased ovarian ROS production, lipid peroxidation and increased antioxidant enzyme activities by improving the expression of Nrf2 and HO-1, reinstating the cellular redox homeostasis. Therefore, it can be suggested that physical restraint induced glucocorticoid and its receptor activation interfered with the ovarian antioxidant defense mechanism. Melatonin via its receptor MT1 significantly alleviated ovarian damages acting as a cytoprotective agent.
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Affiliation(s)
- Jayita Pal Chowdhury
- Pineal Research Lab, Department of Zoology, Banaras Hindu University, Varanasi 221005, Uttar Pradesh, India
| | - Chandana Haldar
- Pineal Research Lab, Department of Zoology, Banaras Hindu University, Varanasi 221005, Uttar Pradesh, India.
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Sen A. Deficient synthesis of melatonin in COVID-19 can impair the resistance of coronavirus patients to mucormycosis. Med Hypotheses 2021; 158:110722. [PMID: 34753008 PMCID: PMC8553412 DOI: 10.1016/j.mehy.2021.110722] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2021] [Revised: 10/12/2021] [Accepted: 10/17/2021] [Indexed: 12/25/2022]
Abstract
In addition to uncontrolled diabetes and the excess use of corticosteroids, it is believed that other factors may be responsible for the recent spurt of COVID-19 associated mucormycosis (CAM). In the present paper it is argued that COVID-19 increases the susceptibility of the patients to mucormycosis by augmenting the virulence factors of the mucor species, where deficient synthesis of melatonin plays a key role. Melatonin is synthesized from tryptophan via the serotonin pathway and melatonin deficiency in COVID-19 arises from the faulty absorption of tryptophan from the food because SARS-CoV-2 downregulates angiotensin-converting enzyme-2, the chaperone of the transporter of tryptophan. The enhanced fungal virulence in COVID-19 can be mitigated by correcting the melatonin deficiency as melatonin can prevent iron acquisition of the mucor species and inhibit their morphological transition from the yeast to the virulent hyphal form, given the fact that melatonin is an iron chelator, calmodulin blocker and inhibitor of myeloperoxidase as well as inhibitor of ferroptosis and pyroptosis. Also, by lowering the expression of glucose-regulated protein 78 and by inhibiting the suppression of T-cell immunity, melatonin can further increase the resistance of the patients to mucormycosis. Accordingly, clinical trials should be carried out on tryptophan supplementation, administration of selective serotonin reuptake inhibitors (to increase serotonin, the precursor of melatonin), and exogenous melatonin to find out how they perform in eliminating or reducing the propensity of the coronavirus patients to CAM.
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Affiliation(s)
- Amarnath Sen
- 40 Jadunath Sarbovouma Lane, Kolkata 700035, India.
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Rao X, Liu L, Wang H, Yu Y, Li W, Chai T, Zhou W, Ji P, Song J, Wei H, Xie P. Regulation of Gut Microbiota Disrupts the Glucocorticoid Receptor Pathway and Inflammation-related Pathways in the Mouse Hippocampus. Exp Neurobiol 2021; 30:59-72. [PMID: 33462159 PMCID: PMC7926043 DOI: 10.5607/en20055] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2020] [Revised: 12/28/2020] [Accepted: 01/04/2021] [Indexed: 11/19/2022] Open
Abstract
An increasing number of studies have recently indicated the important effects of gut microbes on various functions of the central nervous system. However, the underlying mechanisms by which gut microbiota regulate brain functions and behavioral phenotypes remain largely unknown. We therefore used isobaric tags for relative and absolute quantitation (iTRAQ)-based quantitative proteomic analysis to obtain proteomic profiles of the hippocampus in germ-free (GF), colonized GF, and specific pathogen-free (SPF) mice. We then integrated the resulting proteomic data with previously reported mRNA microarray data, to further explore the effects of gut microbes on host brain functions. We identified that 61 proteins were upregulated and 242 proteins were downregulated in GF mice compared with SPF mice. Of these, 124 proteins were significantly restored following gut microbiota colonization. Bioinformatic analysis of these significant proteins indicated that the glucocorticoid receptor signaling pathway and inflammation-related pathways were the most enriched disrupted pathways. This study provides new insights into the pathological mechanisms of gut microbiota-regulated diseases.
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Affiliation(s)
- Xuechen Rao
- College of Biomedical Engineering, Chongqing Medical University, Chongqing 400016, China.,NHC Key Laboratory of Diagnosis and Treatment on Brain Functional Diseases, The First Affiliated Hospital of Chongqing Medical University, Chongqing 400016, China
| | - Lanxiang Liu
- NHC Key Laboratory of Diagnosis and Treatment on Brain Functional Diseases, The First Affiliated Hospital of Chongqing Medical University, Chongqing 400016, China.,Department of Neurology, Yongchuan Hospital of Chongqing Medical University, Chongqing 402160, China
| | - Haiyang Wang
- NHC Key Laboratory of Diagnosis and Treatment on Brain Functional Diseases, The First Affiliated Hospital of Chongqing Medical University, Chongqing 400016, China.,College of Stomatology and Affiliated Stomatological Hospital of Chongqing Medical University, Chongqing 401147, China
| | - Ying Yu
- NHC Key Laboratory of Diagnosis and Treatment on Brain Functional Diseases, The First Affiliated Hospital of Chongqing Medical University, Chongqing 400016, China
| | - Wenxia Li
- NHC Key Laboratory of Diagnosis and Treatment on Brain Functional Diseases, The First Affiliated Hospital of Chongqing Medical University, Chongqing 400016, China
| | - Tingjia Chai
- NHC Key Laboratory of Diagnosis and Treatment on Brain Functional Diseases, The First Affiliated Hospital of Chongqing Medical University, Chongqing 400016, China
| | - Wei Zhou
- NHC Key Laboratory of Diagnosis and Treatment on Brain Functional Diseases, The First Affiliated Hospital of Chongqing Medical University, Chongqing 400016, China
| | - Ping Ji
- College of Stomatology and Affiliated Stomatological Hospital of Chongqing Medical University, Chongqing 401147, China
| | - Jinlin Song
- College of Stomatology and Affiliated Stomatological Hospital of Chongqing Medical University, Chongqing 401147, China
| | - Hong Wei
- Department of Laboratory Animal Science, College of Basic Medical Sciences, Third Military Medical University, Chongqing 400038, China
| | - Peng Xie
- NHC Key Laboratory of Diagnosis and Treatment on Brain Functional Diseases, The First Affiliated Hospital of Chongqing Medical University, Chongqing 400016, China.,Department of Neurology, The First Affiliated Hospital of Chongqing Medical University, Chongqing 400016, China
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8
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Cai L, Chen Q, Yao Z, Sun Q, Wu L, Ni Y. Glucocorticoid receptors involved in melatonin inhibiting cell apoptosis and NLRP3 inflammasome activation caused by bacterial toxin pyocyanin in colon. Free Radic Biol Med 2021; 162:478-489. [PMID: 33189867 DOI: 10.1016/j.freeradbiomed.2020.11.003] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/19/2020] [Revised: 10/30/2020] [Accepted: 11/04/2020] [Indexed: 02/07/2023]
Abstract
The immunoinhibitory effect of glucocorticoid and immunoenhancing attributes of melatonin (MEL) are well known, however, the involvement of glucocorticoid receptor (GR) in melatonin modulation of bacterial toxins caused-inflammation has not been studied in colon. Pyocyanin (PCN), a toxin released by Pseudomonas aeruginosa, can destroy cells through generating superoxide products and inflammatory response. Here we report that PCN treatment elevated the generation of reactive oxygen species (ROS), which further lead to mitochondrial swelling and caspase cascades activation both in vivo and in vitro. However, MEL treatment alleviated the oxidative stress caused by PCN on cells through scavenging ROS and restoring the expression of antioxidant enzyme so that to effectively alleviate the apoptosis. Large amounts of ROS can activate the NLRP3 signaling pathway, so MEL inhibited PCN induced NLRP3 inflammasome activation and inflammatory cytokines (IL-1β, IL-8, and TNF-α) secretion. In order to further investigate the molecular mechanism, goblet cells were exposed to MEL and PCN in the presence of luzindole and RU486, inhibitors of MEL receptors and GR respectively. It was found that PCN significantly inhibited the expression level of GR, and MEL effectively alleviated the inhibition phenomenon. Moreover, we found that MEL mainly upregulated the expression of GR to achieve its anti-inflammatory and anti-apoptotic functions rather than through its own receptor (MT2) in colon goblet cells. Therefore, MEL can reverse the inhibitory effects of PCN on GR/p-GR expression to present its anti-oxidative and anti-apoptotic function.
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Affiliation(s)
- Liuping Cai
- Key Laboratory of Animal Physiology & Biochemistry, Nanjing Agricultural University, Nanjing, 210095, PR China.
| | - Qu Chen
- Key Laboratory of Animal Physiology & Biochemistry, Nanjing Agricultural University, Nanjing, 210095, PR China.
| | - Zhihao Yao
- Key Laboratory of Animal Physiology & Biochemistry, Nanjing Agricultural University, Nanjing, 210095, PR China.
| | - Qinwei Sun
- Key Laboratory of Animal Physiology & Biochemistry, Nanjing Agricultural University, Nanjing, 210095, PR China.
| | - Lei Wu
- Key Laboratory of Animal Physiology & Biochemistry, Nanjing Agricultural University, Nanjing, 210095, PR China.
| | - Yingdong Ni
- Key Laboratory of Animal Physiology & Biochemistry, Nanjing Agricultural University, Nanjing, 210095, PR China.
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Kharwar RK, Singh V, Haldar C. Expression of Melatonin and Glucocorticoid
Receptor Varies along with Lung-Associated Cell-Mediated Immunity
in the Jungle Bush Quail Perdicula asiatica:
a Trade-off between Melatonin and Dexamethasone. J EVOL BIOCHEM PHYS+ 2020. [DOI: 10.1134/s0022093020040079] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
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10
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Role of melatonin and HSF-1\HSP-70 in modulating cold stress-induced immunosuppression in a tropical rodent- Funambulus pennanti. J Therm Biol 2020; 87:102456. [PMID: 32001016 DOI: 10.1016/j.jtherbio.2019.102456] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2019] [Revised: 11/03/2019] [Accepted: 11/18/2019] [Indexed: 11/21/2022]
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Perinatal Use of Melatonin for Offspring Health: Focus on Cardiovascular and Neurological Diseases. Int J Mol Sci 2019; 20:ijms20225681. [PMID: 31766163 PMCID: PMC6888176 DOI: 10.3390/ijms20225681] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2019] [Revised: 11/06/2019] [Accepted: 11/12/2019] [Indexed: 12/16/2022] Open
Abstract
Cardiovascular and neurological diseases can originate in early life. Melatonin, a biologically active substance, acts as a pleiotropic hormone essential for pregnancy and fetal development. Maternal melatonin can easily pass the placenta and provide photoperiodic signals to the fetus. Though melatonin uses in pregnant or lactating women have not yet been recommended, there is a growing body of evidence from animal studies in support of melatonin as a reprogramming strategy to prevent the developmental programming of cardiovascular and neurological diseases. Here, we review several key themes in melatonin use in pregnancy and lactation within offspring health and disease. We have particularly focused on the following areas: the pathophysiological roles of melatonin in pregnancy, lactation, and fetal development; clinical uses of melatonin in fetal and neonatal diseases; experimental evidence supporting melatonin as a reprogramming therapy to prevent cardiovascular and neurological diseases; and reprogramming mechanisms of melatonin within developmental programming. The targeting of melatonin uses in pregnancy and lactation will be valuable in the prevention of various adult chronic diseases in later life, and especially cardiovascular and neurological diseases.
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12
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Melatonin and breast cancer: Evidences from preclinical and human studies. Crit Rev Oncol Hematol 2018; 122:133-143. [DOI: 10.1016/j.critrevonc.2017.12.018] [Citation(s) in RCA: 59] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2017] [Revised: 10/20/2017] [Accepted: 12/27/2017] [Indexed: 12/22/2022] Open
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Souza A, Carraro Detanico B, Fernandes Medeiros L, Oliveira CD, Leal Scarabelot V, Giotti Cioato S, Caumo W, Torres ILS. Acute stress disrupts temporal patterns of behavioral and biochemical parameters of rats. BIOL RHYTHM RES 2017. [DOI: 10.1080/09291016.2017.1386267] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Affiliation(s)
- Andressa Souza
- Post-Graduate Program in Medicine: Medical Sciences – Medicine School, Universidade Federal do Rio Grande do Sul, Porto Alegre, Brazil
- Pharmacology of Pain and Neuromodulation Laboratory: Pre-clinical Researchs, Department of Pharmacology, Universidade Federal do Rio Grande do Sul, ICBS, Porto Alegre, Brazil
- Animal Experimentation Unit and Graduate Research Group, Hospital de Clínicas de Porto Alegre, Porto Alegre, Brazil
- Post-Graduate Program in Health and Human Development, Universidade La Salle, Canoas, Brazil
| | - Bernardo Carraro Detanico
- Post-Graduate Program in Medicine: Medical Sciences – Medicine School, Universidade Federal do Rio Grande do Sul, Porto Alegre, Brazil
- Pharmacology of Pain and Neuromodulation Laboratory: Pre-clinical Researchs, Department of Pharmacology, Universidade Federal do Rio Grande do Sul, ICBS, Porto Alegre, Brazil
- Animal Experimentation Unit and Graduate Research Group, Hospital de Clínicas de Porto Alegre, Porto Alegre, Brazil
- Post-Graduate Program in Health and Human Development, Universidade La Salle, Canoas, Brazil
| | - Liciane Fernandes Medeiros
- Pharmacology of Pain and Neuromodulation Laboratory: Pre-clinical Researchs, Department of Pharmacology, Universidade Federal do Rio Grande do Sul, ICBS, Porto Alegre, Brazil
- Animal Experimentation Unit and Graduate Research Group, Hospital de Clínicas de Porto Alegre, Porto Alegre, Brazil
- Post-Graduate Program in Health and Human Development, Universidade La Salle, Canoas, Brazil
| | - Carla de Oliveira
- Post-Graduate Program in Medicine: Medical Sciences – Medicine School, Universidade Federal do Rio Grande do Sul, Porto Alegre, Brazil
- Pharmacology of Pain and Neuromodulation Laboratory: Pre-clinical Researchs, Department of Pharmacology, Universidade Federal do Rio Grande do Sul, ICBS, Porto Alegre, Brazil
- Animal Experimentation Unit and Graduate Research Group, Hospital de Clínicas de Porto Alegre, Porto Alegre, Brazil
- Post-Graduate Program in Health and Human Development, Universidade La Salle, Canoas, Brazil
| | - Vanessa Leal Scarabelot
- Pharmacology of Pain and Neuromodulation Laboratory: Pre-clinical Researchs, Department of Pharmacology, Universidade Federal do Rio Grande do Sul, ICBS, Porto Alegre, Brazil
- Animal Experimentation Unit and Graduate Research Group, Hospital de Clínicas de Porto Alegre, Porto Alegre, Brazil
- Post-Graduate Program in Health and Human Development, Universidade La Salle, Canoas, Brazil
| | - Stefania Giotti Cioato
- Post-Graduate Program in Medicine: Medical Sciences – Medicine School, Universidade Federal do Rio Grande do Sul, Porto Alegre, Brazil
- Pharmacology of Pain and Neuromodulation Laboratory: Pre-clinical Researchs, Department of Pharmacology, Universidade Federal do Rio Grande do Sul, ICBS, Porto Alegre, Brazil
- Animal Experimentation Unit and Graduate Research Group, Hospital de Clínicas de Porto Alegre, Porto Alegre, Brazil
- Post-Graduate Program in Health and Human Development, Universidade La Salle, Canoas, Brazil
| | - Wolnei Caumo
- Post-Graduate Program in Medicine: Medical Sciences – Medicine School, Universidade Federal do Rio Grande do Sul, Porto Alegre, Brazil
- Post-Graduate Program in Health and Human Development, Universidade La Salle, Canoas, Brazil
| | - Iraci LS Torres
- Post-Graduate Program in Medicine: Medical Sciences – Medicine School, Universidade Federal do Rio Grande do Sul, Porto Alegre, Brazil
- Pharmacology of Pain and Neuromodulation Laboratory: Pre-clinical Researchs, Department of Pharmacology, Universidade Federal do Rio Grande do Sul, ICBS, Porto Alegre, Brazil
- Animal Experimentation Unit and Graduate Research Group, Hospital de Clínicas de Porto Alegre, Porto Alegre, Brazil
- Post-Graduate Program in Health and Human Development, Universidade La Salle, Canoas, Brazil
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Cissé YM, Russart KLG, Nelson RJ. Parental Exposure to Dim Light at Night Prior to Mating Alters Offspring Adaptive Immunity. Sci Rep 2017; 7:45497. [PMID: 28361901 PMCID: PMC5374442 DOI: 10.1038/srep45497] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2016] [Accepted: 02/28/2017] [Indexed: 11/09/2022] Open
Abstract
Exposure to dim light at night (dLAN) disrupts natural light/dark cycles and impairs endogenous circadian rhythms necessary to maintain optimal biological function, including the endocrine and immune systems. We have previously demonstrated that white dLAN compromises innate and cell mediated immune responses in adult Siberian hamsters (Phodopus sungorus). We hypothesized that dLAN has transgenerational influences on immune function. Adult male and female Siberian hamsters were exposed to either dark nights (DARK) or dLAN (~5 lux) for 9 weeks, then paired in full factorial design, mated, and thereafter housed under dark nights. Offspring were gestated and reared in dark nights, then tested as adults for cell-mediated and humoral immunity. Maternal exposure to dLAN dampened delayed type hypersensitivity (DTH) responses in male offspring. Maternal and paternal exposure to dLAN reduced DTH responses in female offspring. IgG antibodies to a novel antigen were elevated in offspring of dams exposed to dLAN. Paternal exposure to dLAN decreased splenic endocrine receptor expression and global methylation in a parental sex-specific manner. Together, these data suggest that exposure to dLAN has transgenerational effects on endocrine-immune function that may be mediated by global alterations in the epigenetic landscape of immune tissues.
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Affiliation(s)
- Yasmine M Cissé
- Department of Neuroscience, Neuroscience Research Institute, Behavioral Neuroendocrinology Group, The Ohio State University Wexner Medical Center, Columbus, OH 43210, USA
| | - Kathryn L G Russart
- Department of Neuroscience, Neuroscience Research Institute, Behavioral Neuroendocrinology Group, The Ohio State University Wexner Medical Center, Columbus, OH 43210, USA
| | - Randy J Nelson
- Department of Neuroscience, Neuroscience Research Institute, Behavioral Neuroendocrinology Group, The Ohio State University Wexner Medical Center, Columbus, OH 43210, USA
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Gupta S, Haldar C. Short day length enhances physiological resilience of the immune system against 2-deoxy-d-glucose-induced metabolic stress in a tropical seasonal breeder Funambulus pennanti. Horm Behav 2017; 89:157-166. [PMID: 28131595 DOI: 10.1016/j.yhbeh.2017.01.004] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/03/2016] [Revised: 01/23/2017] [Accepted: 01/24/2017] [Indexed: 01/09/2023]
Abstract
Studies demonstrate the importance of metabolic resources in the regulation of reproduction and immune functions in seasonal breeders. In this regard, the restricted energy availability can be considered as an environmental variable that may act as a seasonal stressor and can lead to compromised immune functions. The present study explored the effect of photoperiodic variation in the regulation of immune function under metabolic stress condition. The T-cell-dependent immune response in a tropical seasonal breeder Funambulus pennanti was studied following the inhibition of cellular glucose utilization with 2-deoxy-d-glucose (2-DG). 2-DG treatment resulted in the suppression of general (e.g., proliferative response of lymphocytes) and antigen-specific [anti-keyhole limpet hemocyanin IgG titer and delayed-type hypersensitivity response] T-cell responses with an activation of the hypothalamic-pituitary-adrenal axis, which was evident from the increased levels of plasma corticosterone. 2-DG administration increased the production of inflammatory cytokines [interleukin (IL)-1β and tumor necrosis factor (TNF)-α] and decreased the autocrine T-cell growth factor IL-2. The immunocompromising effect of 2-DG administration was retarded in animals exposed to short photoperiods compared with the control and long photoperiod-exposed groups. This finding suggested that short photoperiodic conditions enhanced the resilience of the immune system, possibly by diverting metabolic resources from the reproductive organs toward the immune system. In addition, melatonin may have facilitated the energy "trade-off" between reproductive and immune mechanisms, thereby providing an advantage to the seasonal breeders for their survival during stressful environmental conditions.
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Affiliation(s)
- Sameer Gupta
- Pineal Research Laboratory, Department of Zoology, Institute of Science, Banaras Hindu University, Varanasi 221 005, India
| | - Chandana Haldar
- Pineal Research Laboratory, Department of Zoology, Institute of Science, Banaras Hindu University, Varanasi 221 005, India.
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Tain YL, Huang LT, Hsu CN. Developmental Programming of Adult Disease: Reprogramming by Melatonin? Int J Mol Sci 2017; 18:ijms18020426. [PMID: 28212315 PMCID: PMC5343960 DOI: 10.3390/ijms18020426] [Citation(s) in RCA: 47] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2017] [Revised: 01/26/2017] [Accepted: 02/13/2017] [Indexed: 12/25/2022] Open
Abstract
Adult-onset chronic non-communicable diseases (NCDs) can originate from early life through so-called the "developmental origins of health and disease" (DOHaD) or "developmental programming". The DOHaD concept offers the "reprogramming" strategy to shift the treatment from adulthood to early life, before clinical disease is apparent. Melatonin, an endogenous indoleamine produced by the pineal gland, has pleiotropic bioactivities those are beneficial in a variety of human diseases. Emerging evidence support that melatonin is closely inter-related to other proposed mechanisms contributing to the developmental programming of a variety of chronic NCDs. Recent animal studies have begun to unravel the multifunctional roles of melatonin in many experimental models of developmental programming. Even though some progress has been made in research on melatonin as a reprogramming strategy to prevent DOHaD-related NCDs, future human studies should aim at filling the translational gap between animal models and clinical trials. Here, we review several key themes on the reprogramming effects of melatonin in DOHaD research. We have particularly focused on the following areas: mechanisms of developmental programming; the interrelationship between melatonin and mechanisms underlying developmental programming; pathophysiological roles of melatonin in pregnancy and fetal development; and insight provided by animal models to support melatonin as a reprogramming therapy. Rates of NCDs are increasing faster than anticipated all over the world. Hence, there is an urgent need to understand reprogramming mechanisms of melatonin and to translate experimental research into clinical practice for halting a growing list of DOHaD-related NCDs.
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Affiliation(s)
- You-Lin Tain
- Department of Pediatrics, Kaohsiung Chang Gung Memorial Hospital and Chang Gung University College of Medicine, Kaohsiung 833, Taiwan.
- Institute for Translational Research in Biomedicine, Kaohsiung Chang Gung Memorial Hospital and Chang Gung University College of Medicine, Kaohsiung 833, Taiwan.
| | - Li-Tung Huang
- Department of Pediatrics, Kaohsiung Chang Gung Memorial Hospital and Chang Gung University College of Medicine, Kaohsiung 833, Taiwan.
- Department of Traditional Chinese Medicine, Chang Gung University, Linkow 244, Taiwan.
| | - Chien-Ning Hsu
- Department of Pharmacy, Kaohsiung Chang Gung Memorial Hospital, Kaohsiung 833, Taiwan.
- School of Pharmacy, Kaohsiung Medical University, Kaohsiung 807, Taiwan.
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Singh SS, Deb A, Sutradhar S. Dexamethasone modulates melatonin MT2 receptor expression in splenic tissue and humoral immune response in mice. BIOL RHYTHM RES 2016. [DOI: 10.1080/09291016.2016.1268330] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Affiliation(s)
- Shiv Shankar Singh
- Molecular Endocrinology Research Lab, Department of Zoology, Tripura University, Suryamaninagar, India
| | - Anindita Deb
- Molecular Endocrinology Research Lab, Department of Zoology, Tripura University, Suryamaninagar, India
| | - Sangita Sutradhar
- Molecular Endocrinology Research Lab, Department of Zoology, Tripura University, Suryamaninagar, India
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18
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Gupta S, Haldar C. Photoperiodic modulation of local melatonin synthesis and its role in regulation of thymic homeostasis in Funambulus pennanti. Gen Comp Endocrinol 2016; 239:40-49. [PMID: 26699203 DOI: 10.1016/j.ygcen.2015.12.009] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/04/2015] [Revised: 12/08/2015] [Accepted: 12/13/2015] [Indexed: 10/22/2022]
Abstract
The effect of photo-neuroendocrine system on the thymic (immune) functions is mediated by gonadal steroid and the pineal hormone melatonin. The present study explored the effect of photoperiod on the thymic melatonergic system and its role in protection of thymic T-cells from the testosterone induced seasonal oxidative stress and apoptosis. Exposure to long day-length (LD) was noted to decrease local (thymic) melatonin content and induce oxidative stress and apoptosis in the thymus. Increased peripheral level of testosterone upregulated the androgen receptor expression and, consequently reduced proliferation response of the thymocytes. Short day conditions (SD) however, reversed the effect of LD on the thymic physiology. Low level of testosterone was concomitant with diminished nitro-oxidative stress and decreased expression of redox sensitive factors (NF-κB, p53 and Bax/Bcl-2 ratio) in the thymus. SD retarded activation of caspase-3 resulting in procaspase-3 accumulation. Further, in vitro treatment of thymocytes with AR antagonist flutamide impaired the sensitivity of thymocytes to androgen and reversed the deleterious effects of testosterone on the proliferative and apoptotic responses of thymocytes. Therefore, it can be suggested that thymus derived melatonin protects thymic T-cells from testosterone induced seasonal oxidative stress, apoptosis and also acts as a potent paracrine factor for maintenance of redox status to ensure thymocyte survival.
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Affiliation(s)
- Sameer Gupta
- Pineal Research Laboratory, Department of Zoology, Banaras Hindu University, Varanasi 221 005, India.
| | - Chandana Haldar
- Pineal Research Laboratory, Department of Zoology, Banaras Hindu University, Varanasi 221 005, India.
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19
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Singh AK, Haldar C. Melatonin modulates glucocorticoid receptor mediated inhibition of antioxidant response and apoptosis in peripheral blood mononuclear cells. Mol Cell Endocrinol 2016; 436:59-67. [PMID: 27452798 DOI: 10.1016/j.mce.2016.07.024] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/31/2016] [Revised: 07/18/2016] [Accepted: 07/20/2016] [Indexed: 01/09/2023]
Abstract
Pineal melatonin is known for its immunomodulatory and anti-stress properties. It modulates stress condition by regulating antioxidant responses and apoptosis in the immune cells. Stress causes increased glucocorticoid level that acts through glucocorticoid receptor (GR) and is translocated into nucleus under regulation of HSP90 based chaperone machinery. Melatonin influences glucocorticoid and GR mediated stress condition in rodents, but till date there are no reports which could suggest the effect of melatonin treatment on GR mediated apoptosis and inhibition of Nrf-2/hemeoxygenase-1 (HO-1) induced antioxidant status in immunocompetent cells (peripheral blood mononuclear cells; PBMCs). Therefore, in the present study, we considered GR mediated inhibition of Nrf2 and HO-1 along with anti-apoptotic Bcl-2 expression in PBMCs. The PBMCs were treated with synthetic glucocorticoid; dexamethasone (Dex) and melatonin (Mel), to explore the effect of melatonin treatment in regulation of GR mediated apoptosis and inhibition of antioxidant status in immune cells. It was noted that melatonin treatment retained GR into cytoplasm by inhibiting the dissociation of HSP90 from GR-HSP90 complex and enhanced expression of Nrf2/HO-1 and Bcl-2 expression. This led to increased HO-1 expression and elevated Bcl-2 led to increased Bcl-2/Bax ratio that might ultimately enhanced the cellular antioxidant response and survival under glucocorticoid mediated stress condition. Our observations suggest that the declined GR nuclear translocation upon melatonin treatment might be responsible for the up-regulation of Nrf2 mediated HO-1 activity and increased Bcl-2/Bax ratio in PBMCs to maintain the immune homeostasis under stress condition.
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Affiliation(s)
- Amaresh Kumar Singh
- Pineal Research Laboratory, Department of Zoology, Banaras Hindu University, Varanasi, 221005, India.
| | - Chandana Haldar
- Pineal Research Laboratory, Department of Zoology, Banaras Hindu University, Varanasi, 221005, India.
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20
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DHEA-induced modulation of renal gluconeogenesis, insulin sensitivity and plasma lipid profile in the control- and dexamethasone-treated rabbits. Metabolic studies. Biochimie 2016; 121:87-101. [DOI: 10.1016/j.biochi.2015.11.019] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2015] [Accepted: 11/19/2015] [Indexed: 12/13/2022]
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21
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Mukherjee A, Haldar C. Effect of 2-deoxy-d-glucose induced metabolic stress on testicular steroidogenesis and antioxidant status in golden hamster,Mesocricetus auratus: Role of photoperiod. JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY B-BIOLOGY 2015; 153:40-50. [DOI: 10.1016/j.jphotobiol.2015.09.004] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/23/2015] [Revised: 09/02/2015] [Accepted: 09/03/2015] [Indexed: 02/06/2023]
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Melatonin membrane receptor (MT1R) expression and nitro-oxidative stress in testis of golden hamster, Mesocricetus auratus: An age-dependent study. Exp Gerontol 2015; 69:211-20. [DOI: 10.1016/j.exger.2015.06.022] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2014] [Revised: 05/09/2015] [Accepted: 06/29/2015] [Indexed: 02/02/2023]
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23
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Weil ZM, Borniger JC, Cisse YM, Abi Salloum BA, Nelson RJ. Neuroendocrine control of photoperiodic changes in immune function. Front Neuroendocrinol 2015; 37:108-18. [PMID: 25456047 PMCID: PMC4402123 DOI: 10.1016/j.yfrne.2014.10.001] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/26/2014] [Revised: 10/07/2014] [Accepted: 10/09/2014] [Indexed: 12/29/2022]
Abstract
Seasonal variation in immune function putatively maximizes survival and reproductive success. Day length (photoperiod) is the most potent signal for time of year. Animals typically organize breeding, growth, and behavior to adapt to spatial and temporal niches. Outside the tropics individuals monitor photoperiod to support adaptations favoring survival and reproductive success. Changes in day length allow anticipation of seasonal changes in temperature and food availability that are critical for reproductive success. Immune function is typically bolstered during winter, whereas reproduction and growth are favored during summer. We provide an overview of how photoperiod influences neuronal function and melatonin secretion, how melatonin acts directly and indirectly to govern seasonal changes in immune function, and the manner by which other neuroendocrine effectors such as glucocorticoids, prolactin, thyroid, and sex steroid hormones modulate seasonal variations in immune function. Potential future research avenues include commensal gut microbiota and light pollution influences on photoperiodic responses.
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Affiliation(s)
- Zachary M Weil
- Department of Neuroscience, Ohio State University Wexner Medical Center, Columbus, OH 43210, USA.
| | - Jeremy C Borniger
- Department of Neuroscience, Ohio State University Wexner Medical Center, Columbus, OH 43210, USA
| | - Yasmine M Cisse
- Department of Neuroscience, Ohio State University Wexner Medical Center, Columbus, OH 43210, USA
| | - Bachir A Abi Salloum
- Department of Neuroscience, Ohio State University Wexner Medical Center, Columbus, OH 43210, USA
| | - Randy J Nelson
- Department of Neuroscience, Ohio State University Wexner Medical Center, Columbus, OH 43210, USA
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Ekthuwapranee K, Sotthibundhu A, Tocharus C, Govitrapong P. Melatonin ameliorates dexamethasone-induced inhibitory effects on the proliferation of cultured progenitor cells obtained from adult rat hippocampus. J Steroid Biochem Mol Biol 2015; 145:38-48. [PMID: 25305353 DOI: 10.1016/j.jsbmb.2014.10.003] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/30/2014] [Revised: 09/22/2014] [Accepted: 10/05/2014] [Indexed: 01/15/2023]
Abstract
Glucocorticoids, hormones that are released in response to stress, induce neuronal cell damage. The hippocampus is a primary target of glucocorticoids in the brain, the effects of which include the suppression of cell proliferation and diminished neurogenesis in the dentate gyrus. Our previous study found that melatonin, synthesized primarily in the pineal, pretreatment prevented the negative effects of dexamethasone, the glucocorticoid receptor agonist, on behavior and neurogenesis in rat hippocampus. In the present study, we attempted to investigate the interrelationship between melatonin and dexamethasone on the underlying mechanism of neural stem cell proliferation. Addition of dexamethasone to hippocampal progenitor cells from eight-week old rats resulted in a decrease in the number of neurospheres; pretreatment with melatonin precluded these effects. The immunocytochemical analyses indicated a reduction of Ki67 and nestin-positive cells in the dexamethasone-treated group, which was minimized by melatonin pretreatment. A reduction of the extracellular signal-regulated kinase 1 and 2 (ERK1/2) phosphorylation and G1-S phase cell cycle regulators cyclin E and CDK2 in dexamethasone-treated progenitor cells were prevented by pretreatment of melatonin. Moreover, luzindole, a melatonin receptor antagonist blocked the positive effect of melatonin whereas RU48, the glucocorticoid receptor antagonist blocked the negative effect of dexamethasone on the number of neurospheres. Moreover, we also found that dexamethasone increased the glucocorticoid receptor protein but decreased the level of MT1 melatonin receptor, whereas melatonin increased the level of MT1 melatonin receptor but decreased the glucocorticoid receptor protein. These suggest the crosstalk and cross regulation between the melatonin receptor and the glucocorticoid receptor on hippocampal progenitor cell proliferation.
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Affiliation(s)
- Kasima Ekthuwapranee
- Research Center for Neuroscience, Institute of Molecular Biosciences, Mahidol University, Thailand
| | | | | | - Piyarat Govitrapong
- Research Center for Neuroscience, Institute of Molecular Biosciences, Mahidol University, Thailand; Center for Neuroscience and Department of Pharmacology, Faculty of Science, Mahidol University, Thailand.
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25
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Photoperiodic regulation of nuclear melatonin receptor RORα in lymphoid organs of a tropical rodent Funambulus pennanti: Role in seasonal oxidative stress. JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY B-BIOLOGY 2015; 142:141-53. [DOI: 10.1016/j.jphotobiol.2014.11.013] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/10/2014] [Revised: 10/16/2014] [Accepted: 11/03/2014] [Indexed: 11/21/2022]
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26
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Nycthemeral variation in melatonin receptor expression in the lymphoid organs of a tropical seasonal breeder Funambulus pennanti. J Comp Physiol A Neuroethol Sens Neural Behav Physiol 2014; 200:1045-55. [DOI: 10.1007/s00359-014-0959-2] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2013] [Revised: 10/24/2014] [Accepted: 10/25/2014] [Indexed: 12/15/2022]
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27
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Mukherjee A, Haldar C, Vishwas DK. Melatonin prevents dexamethasone-induced testicular oxidative stress and germ cell apoptosis in golden hamster,Mesocricetus auratus. Andrologia 2014; 47:920-31. [DOI: 10.1111/and.12357] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 08/05/2014] [Indexed: 01/08/2023] Open
Affiliation(s)
- Arun Mukherjee
- Department of Zoology; Pineal Research Laboratory; Banaras Hindu University; Varanasi 221005 India
| | - Chandana Haldar
- Department of Zoology; Pineal Research Laboratory; Banaras Hindu University; Varanasi 221005 India
| | - Dipanshu Kumar Vishwas
- Department of Zoology; Pineal Research Laboratory; Banaras Hindu University; Varanasi 221005 India
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28
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Arora S, Basu P, Singh P, Haldar C. Reproductive seasonality in the Indian pygmy field mouse,Mus terricolor. BIOL RHYTHM RES 2014. [DOI: 10.1080/09291016.2014.939443] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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29
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Pinato L, da Silveira Cruz-Machado S, Franco DG, Campos LMG, Cecon E, Fernandes PACM, Bittencourt JC, Markus RP. Selective protection of the cerebellum against intracerebroventricular LPS is mediated by local melatonin synthesis. Brain Struct Funct 2013; 220:827-40. [PMID: 24363121 PMCID: PMC4341011 DOI: 10.1007/s00429-013-0686-4] [Citation(s) in RCA: 49] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2013] [Accepted: 12/03/2013] [Indexed: 12/23/2022]
Abstract
Although melatonin is mainly produced by the pineal gland, an increasing number of extra-pineal sites of melatonin synthesis have been described. We previously demonstrated the existence of bidirectional communication between the pineal gland and the immune system that drives a switch in melatonin production from the pineal gland to peripheral organs during the mounting of an innate immune response. In the present study, we show that acute neuroinflammation induced by lipopolysaccharide (LPS) injected directly into the lateral ventricles of adult rats reduces the nocturnal peak of melatonin in the plasma and induces its synthesis in the cerebellum, though not in the cortex or hippocampus. This increase in cerebellar melatonin content requires the activation of nuclear factor kappa B (NF-κB), which positively regulates the expression of the key enzyme for melatonin synthesis, arylalkylamine N-acetyltransferase (AA-NAT). Interestingly, LPS treatment led to neuronal death in the hippocampus and cortex, but not in the cerebellum. This privileged protection of cerebellar cells was abrogated when G-protein-coupled melatonin receptors were blocked by the melatonin antagonist luzindole, suggesting that the local production of melatonin protects cerebellar neurons from LPS toxicity. This is the first demonstration of a switch between pineal and extra-pineal melatonin production in the central nervous system following a neuroinflammatory response. These results have direct implications concerning the differential susceptibility of specific brain areas to neuronal death.
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Affiliation(s)
- Luciana Pinato
- Laboratory of Chronopharmacology, Department of Physiology, Institute of Biosciences, University of São Paulo (USP), São Paulo, SP, 05508-090, Brazil
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30
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Melatonin attenuates dexamethasone-induced spatial memory impairment and dexamethasone-induced reduction of synaptic protein expressions in the mouse brain. Neurochem Int 2013; 63:482-91. [DOI: 10.1016/j.neuint.2013.08.011] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2013] [Revised: 07/31/2013] [Accepted: 08/08/2013] [Indexed: 11/19/2022]
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31
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Vishwas DK, Haldar C. Photoperiodic induced melatonin regulates immunity and expression pattern of melatonin receptor MT1 in spleen and bone marrow mononuclear cells of male golden hamster. JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY B-BIOLOGY 2013; 128:107-14. [PMID: 24090924 DOI: 10.1016/j.jphotobiol.2013.08.018] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/11/2013] [Revised: 08/27/2013] [Accepted: 08/30/2013] [Indexed: 12/15/2022]
Abstract
The pineal gland transduces day length information into chemical signal of melatonin that ultimately translates photic stimulus into season-specific immune responses to promote survival of individual from incidence of opportunistic diseases. To date, the immune adjustments being a result of photoperiodic exposures for any nocturnal seasonally breeding rodent have not been systematically examined. Therefore, we evaluated the humoral and cell mediated immune responses of photoperiodically entrained male golden hamsters. Short day induced melatonin increased the immune parameters such as spleen mass, total leukocyte (TLC) and lymphocyte count (LC), proliferation of splenocytes, peripheral blood mononuclear cells (PBMCs) and bone marrow mononuclear cells (BMMNCs) along with serum IL-2 and anti-Keyhole Limpet Hemocyanin (KLH) IgG production when compared with long day experienced hamsters. Short term melatonin treatment (for two weeks) to long day hamsters enhanced to some extent the proliferation of splenocytes, PBMC and TLC/LC. We also localized the melatonin membrane receptor MT1 in spleen and BMMNCs that strongly supported our western blot analysis for the expression of MT1 in spleen suggesting that different photoperiodically induced circulatory melatonin is responsible for the immunomodulation. Therefore, photoperiod can influence the peripheral melatonin level to improve immune responses of hamsters according to season for better survival.
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Affiliation(s)
- Dipanshu Kumar Vishwas
- Pineal Research Lab, Department of Zoology, Banaras Hindu University, Varanasi 221 005, India
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32
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Abstract
The first observation on the relationship between the pineal gland and the immune system was done by the author of this paper in the late sixties and early seventies of the last century. After neonatal pinealectomy the thymus has been destroyed and wasting disease developed. Since that time a flood of experiments justified the observation and pointed to the prominent role of pineal in the regulation of the immune system. Melatonin, the hormone of the pineal gland stimulates immune processes acting to the immune cells' cytokine production, the haemopoiesis, and immune cell-target cell interactions. Melatonin receptors have been demonstrated and their localization and function were justified. Melatonin production by and melatonin receptors on (and in) the immune cells was proved. Melatonin agonists have been synthesized and the use of melatonin as adjuvant in the therapy of diseases connected to the immune system (cancers included) has been started. The paper summarizes the most important studies and discusses the interrelations of the data. The discussion points to the possibility of packed transport of the pineal hormone by the immune cells and to the adventages of local regulation by this transport.
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Affiliation(s)
- György Csaba
- Semmelweis University, Department of Genetics, Cell and Immunobiology, Budapest, Hungary.
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33
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Vishwas DK, Mukherjee A, Haldar C. Melatonin improves humoral and cell-mediated immune responses of male golden hamster following stress induced by dexamethasone. J Neuroimmunol 2013; 259:17-25. [DOI: 10.1016/j.jneuroim.2013.03.002] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2013] [Revised: 03/11/2013] [Accepted: 03/15/2013] [Indexed: 10/27/2022]
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Melatonin: buffering the immune system. Int J Mol Sci 2013; 14:8638-83. [PMID: 23609496 PMCID: PMC3645767 DOI: 10.3390/ijms14048638] [Citation(s) in RCA: 419] [Impact Index Per Article: 38.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2013] [Revised: 04/06/2013] [Accepted: 04/07/2013] [Indexed: 12/29/2022] Open
Abstract
Melatonin modulates a wide range of physiological functions with pleiotropic effects on the immune system. Despite the large number of reports implicating melatonin as an immunomodulatory compound, it still remains unclear how melatonin regulates immunity. While some authors argue that melatonin is an immunostimulant, many studies have also described anti-inflammatory properties. The data reviewed in this paper support the idea of melatonin as an immune buffer, acting as a stimulant under basal or immunosuppressive conditions or as an anti-inflammatory compound in the presence of exacerbated immune responses, such as acute inflammation. The clinical relevance of the multiple functions of melatonin under different immune conditions, such as infection, autoimmunity, vaccination and immunosenescence, is also reviewed.
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