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Peruri A, Morgan A, D’Souza A, Mellon B, Hung CW, Kayal G, Shin H, Nguyen K, Zahed M, Yount M, Ellis R, Wynne T, Fritz V, Simmons Z, Roballo KCS. Pineal Gland from the Cell Culture to Animal Models: A Review. LIFE (BASEL, SWITZERLAND) 2022; 12:life12071057. [PMID: 35888145 PMCID: PMC9317964 DOI: 10.3390/life12071057] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/03/2022] [Revised: 07/05/2022] [Accepted: 07/12/2022] [Indexed: 12/11/2022]
Abstract
This review demonstrates current literature on pineal gland physiology, pathology, and animal model experiments to concisely explore future needs in research development with respect to pineal gland function and neuro-regenerative properties. The pineal gland plays an integral role in sleep and recovery by promoting physiologic circadian rhythms via production and release of melatonin. Yet, the current literature shows that the pineal gland has neuroprotective effects that modulate both peripheral and central nerve injuries through several direct and indirect mechanisms, such as angiogenesis and induction of growth factors and anti-inflammatory mediators. Animal models have also shown correlations between pineal gland function and metabolic homeostasis. Studies have shown that a functional pineal gland is essential in preventing and slowing the progression of certain diseases such as diabetes, osteoporosis, vertebral osteoarthritis, and neurodegenerative processes. Lastly, the array of cell culturing methods and animal models that can be used to further develop the study of pineal gland function and nervous system injury were reviewed.
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Affiliation(s)
- Alekhya Peruri
- Biomedical Affairs and Research, Edward Via College of Osteopathic Medicine, 2265 Kraft Drive, Blacksburg, VA 24060, USA; (A.P.); (A.M.); (A.D.); (B.M.); (C.W.H.); (G.K.); (H.S.); (K.N.); (M.Z.); (M.Y.); (R.E.); (T.W.); (V.F.); (Z.S.)
| | - Alexandra Morgan
- Biomedical Affairs and Research, Edward Via College of Osteopathic Medicine, 2265 Kraft Drive, Blacksburg, VA 24060, USA; (A.P.); (A.M.); (A.D.); (B.M.); (C.W.H.); (G.K.); (H.S.); (K.N.); (M.Z.); (M.Y.); (R.E.); (T.W.); (V.F.); (Z.S.)
| | - Alida D’Souza
- Biomedical Affairs and Research, Edward Via College of Osteopathic Medicine, 2265 Kraft Drive, Blacksburg, VA 24060, USA; (A.P.); (A.M.); (A.D.); (B.M.); (C.W.H.); (G.K.); (H.S.); (K.N.); (M.Z.); (M.Y.); (R.E.); (T.W.); (V.F.); (Z.S.)
| | - Bridget Mellon
- Biomedical Affairs and Research, Edward Via College of Osteopathic Medicine, 2265 Kraft Drive, Blacksburg, VA 24060, USA; (A.P.); (A.M.); (A.D.); (B.M.); (C.W.H.); (G.K.); (H.S.); (K.N.); (M.Z.); (M.Y.); (R.E.); (T.W.); (V.F.); (Z.S.)
| | - Carey W. Hung
- Biomedical Affairs and Research, Edward Via College of Osteopathic Medicine, 2265 Kraft Drive, Blacksburg, VA 24060, USA; (A.P.); (A.M.); (A.D.); (B.M.); (C.W.H.); (G.K.); (H.S.); (K.N.); (M.Z.); (M.Y.); (R.E.); (T.W.); (V.F.); (Z.S.)
| | - Gabriella Kayal
- Biomedical Affairs and Research, Edward Via College of Osteopathic Medicine, 2265 Kraft Drive, Blacksburg, VA 24060, USA; (A.P.); (A.M.); (A.D.); (B.M.); (C.W.H.); (G.K.); (H.S.); (K.N.); (M.Z.); (M.Y.); (R.E.); (T.W.); (V.F.); (Z.S.)
| | - Haejung Shin
- Biomedical Affairs and Research, Edward Via College of Osteopathic Medicine, 2265 Kraft Drive, Blacksburg, VA 24060, USA; (A.P.); (A.M.); (A.D.); (B.M.); (C.W.H.); (G.K.); (H.S.); (K.N.); (M.Z.); (M.Y.); (R.E.); (T.W.); (V.F.); (Z.S.)
| | - Kim Nguyen
- Biomedical Affairs and Research, Edward Via College of Osteopathic Medicine, 2265 Kraft Drive, Blacksburg, VA 24060, USA; (A.P.); (A.M.); (A.D.); (B.M.); (C.W.H.); (G.K.); (H.S.); (K.N.); (M.Z.); (M.Y.); (R.E.); (T.W.); (V.F.); (Z.S.)
| | - Malek Zahed
- Biomedical Affairs and Research, Edward Via College of Osteopathic Medicine, 2265 Kraft Drive, Blacksburg, VA 24060, USA; (A.P.); (A.M.); (A.D.); (B.M.); (C.W.H.); (G.K.); (H.S.); (K.N.); (M.Z.); (M.Y.); (R.E.); (T.W.); (V.F.); (Z.S.)
| | - Mason Yount
- Biomedical Affairs and Research, Edward Via College of Osteopathic Medicine, 2265 Kraft Drive, Blacksburg, VA 24060, USA; (A.P.); (A.M.); (A.D.); (B.M.); (C.W.H.); (G.K.); (H.S.); (K.N.); (M.Z.); (M.Y.); (R.E.); (T.W.); (V.F.); (Z.S.)
| | - Reilly Ellis
- Biomedical Affairs and Research, Edward Via College of Osteopathic Medicine, 2265 Kraft Drive, Blacksburg, VA 24060, USA; (A.P.); (A.M.); (A.D.); (B.M.); (C.W.H.); (G.K.); (H.S.); (K.N.); (M.Z.); (M.Y.); (R.E.); (T.W.); (V.F.); (Z.S.)
| | - Taylor Wynne
- Biomedical Affairs and Research, Edward Via College of Osteopathic Medicine, 2265 Kraft Drive, Blacksburg, VA 24060, USA; (A.P.); (A.M.); (A.D.); (B.M.); (C.W.H.); (G.K.); (H.S.); (K.N.); (M.Z.); (M.Y.); (R.E.); (T.W.); (V.F.); (Z.S.)
| | - Virginia Fritz
- Biomedical Affairs and Research, Edward Via College of Osteopathic Medicine, 2265 Kraft Drive, Blacksburg, VA 24060, USA; (A.P.); (A.M.); (A.D.); (B.M.); (C.W.H.); (G.K.); (H.S.); (K.N.); (M.Z.); (M.Y.); (R.E.); (T.W.); (V.F.); (Z.S.)
| | - Zachary Simmons
- Biomedical Affairs and Research, Edward Via College of Osteopathic Medicine, 2265 Kraft Drive, Blacksburg, VA 24060, USA; (A.P.); (A.M.); (A.D.); (B.M.); (C.W.H.); (G.K.); (H.S.); (K.N.); (M.Z.); (M.Y.); (R.E.); (T.W.); (V.F.); (Z.S.)
| | - Kelly C. S. Roballo
- Biomedical Affairs and Research, Edward Via College of Osteopathic Medicine, 2265 Kraft Drive, Blacksburg, VA 24060, USA; (A.P.); (A.M.); (A.D.); (B.M.); (C.W.H.); (G.K.); (H.S.); (K.N.); (M.Z.); (M.Y.); (R.E.); (T.W.); (V.F.); (Z.S.)
- Department of Biomedical Sciences and Pathobiology, Virginia Maryland College of Veterinary Medicine, Virginia Tech, 1410 Prices Fork, Blacksburg, VA 24060, USA
- Correspondence:
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Afeche SC, do Amaral FG, Cipolla-Neto J. Pineal Gland Culture. Methods Mol Biol 2022; 2550:95-100. [PMID: 36180681 DOI: 10.1007/978-1-0716-2593-4_12] [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] [Indexed: 06/16/2023]
Abstract
Pineal gland secretes the hormone melatonin at night with a circadian rhythm. The synthesis and secretion of melatonin are stimulated at night by norepinephrine released by sympathetic postganglionic neurons projecting from the superior cervical ganglia. Norepinephrine simultaneously activates α- and β-adrenoceptors, triggering melatonin synthesis.To study the regulation of melatonin production and secretion, it is very convenient to use an ex vivo preparation. Thus, it is possible to keep intact pineal glands in culture and to study the actions of agonists, antagonists, modulators, toxic agents, etc., in melatonin synthesis. Artificial melatonin synthesis stimulation in vitro is usually achieved by using a β-adrenergic agonist alone or in association with an α-adrenergic agonist. In this chapter, the methodology of cultured pineal glands will be described. Several papers were published by our group using this methodology, approaching the role played in melatonin synthesis control by angiotensin II and IV, insulin, glutamate, voltage-gated calcium channels, anhydroecgonine methyl ester (AEME, crack-cocaine product), monosodium glutamate (MSG), signaling pathways like NFkB, pathophysiological conditions like diabetes, etc.
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Affiliation(s)
| | - Fernanda Gaspar do Amaral
- Pineal Neurobiology Lab, Department of Physiology, Federal University of São Paulo, Sao Paulo, SP, Brazil
| | - José Cipolla-Neto
- Department of Physiology and Biophysics, Institute of Biomedical Sciences, University of São Paulo, Sao Paulo, SP, Brazil
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Santos NFTD, Imberg ADS, Mariano DOC, Moraes ACD, Andrade-Silva J, Fernandes CM, Sobral AC, Giannotti KC, Kuwabara WMT, Pimenta DC, Maria DA, Sandoval MRL, Afeche SC. β-micrustoxin (Mlx-9), a PLA2 from Micrurus lemniscatus snake venom: biochemical characterization and anti-proliferative effect mediated by p53. J Venom Anim Toxins Incl Trop Dis 2022; 28:e20210094. [PMID: 35432496 PMCID: PMC9008913 DOI: 10.1590/1678-9199-jvatitd-2021-0094] [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: 08/26/2021] [Accepted: 12/15/2021] [Indexed: 11/23/2022] Open
Abstract
Background Endogenous phospholipases A2 (PLA2) play a fundamental role in inflammation, neurodegenerative diseases, apoptosis and cellular senescence. Neurotoxins with PLA2 activity are found in snake venoms from the Elapidae and Viperidae families. The mechanism of action of these neurotoxins have been studied using hippocampal and cerebellar neuronal cultures showing [Ca2+]i increase, mitochondrial depolarization and cell death. Astrocytes are rarely used as a model, despite being modulators at the synapses and responsible for homeostasis and defense in the central nervous system. Preserving the cell division ability, they can be utilized to study the cell proliferation process. In the present work cultured astrocytes and glioblastoma cells were employed to characterize the action of β-micrustoxin (previously named Mlx-9), a PLA2 isolated from Micrurus lemniscatus snake venom. The β-micrustoxin structure was determined and the cell proliferation, cell cycle phases and the regulatory proteins p53, p21 and p27 were investigated. Methods β-micrustoxin was characterized biochemically by a proteomic approach. Astrocytes were obtained by dissociation of pineal glands from Wistar rats; glioblastoma tumor cells were purchased from ATCC and Sigma and cultured in DMEM medium. Cell viability was evaluated by MTT assay; cell proliferation and cell cycle phases were analyzed by flow cytometry; p53, p21 and p27 proteins were studied by western blotting and immunocytochemistry. Results Proteomic analysis revealed fragments on β-micrustoxin that aligned with a PLA2 from Micrurus lemniscatus lemniscatus previously identified as transcript ID DN112835_C3_g9_i1/m.9019. β-micrustoxin impaired the viability of astrocytes and glioblastoma tumor cells. There was a reduction in cell proliferation, an increase in G2/M phase and activation of p53, p21 and p27 proteins in astrocytes. Conclusion These findings indicate that β-micrustoxin from Micrurus lemniscatus venom could inhibit cell proliferation through p53, p21 and p27 activation thus imposing cell cycle arrest at the checkpoint G2/M.
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Afeche SC, de Piazza Pimentel D, Ferro LF, Cipolla-Neto J. Pineal Cells Dissociation and Culture: Isolated Pinealocytes, Isolated Astrocytes, and Co-culture. Methods Mol Biol 2022; 2550:85-94. [PMID: 36180680 DOI: 10.1007/978-1-0716-2593-4_11] [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] [Indexed: 06/16/2023]
Abstract
Mammalian pineal glands are composed mostly of pinealocytes, which are the melatonin secretory cells, and also importantly of glial cells in special astrocytes. With the aim of studying the interactions between pinealocytes and astrocytes, the methodologies for obtaining and maintaining isolated pinealocytes and astrocytes in culture were standardized, in addition to the co-culture of both cell types. Some works of our group were published on the interactions between isolated astrocytes and pinealocytes from the pineal gland of Wistar rats, considering the modulatory role of glutamate and angiotensin on the synthesis of melatonin. In this chapter, the methodologies for obtaining and maintaining astrocytes and pinealocytes culture as well as co-culture of these two cell types will be presented.
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Affiliation(s)
| | | | - Luís Felipe Ferro
- Department of Occupational Therapy, Federal University of Parana, Curitiba, PR, Brazil
| | - José Cipolla-Neto
- Department of Physiology and Biophysics, Institute of Biomedical Sciences, University of São Paulo, Sao Paulo, SP, Brazil
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Ge W, Yan ZH, Wang L, Tan SJ, Liu J, Reiter RJ, Luo SM, Sun QY, Shen W. A hypothetical role for autophagy during the day/night rhythm-regulated melatonin synthesis in the rat pineal gland. J Pineal Res 2021; 71:e12742. [PMID: 33960014 DOI: 10.1111/jpi.12742] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/16/2021] [Revised: 04/12/2021] [Accepted: 04/27/2021] [Indexed: 12/18/2022]
Abstract
Melatonin is a highly conserved molecule that regulates day/night rhythms; it is associated with sleep improvement, reactive oxygen species (ROS) scavenging, anti-aging effects, and seasonal and circadian rhythms and has been a hot topic of research for decades. Using single-cell RNA sequencing, a recent study describes a single-cell transcriptome atlas for the rat pineal gland. Based on a more comprehensive analysis of the retrieved data (Mays et al., PLoS One, 2018, 13, e0205883), results from the current study unveiled the underappreciated gene regulatory network behind different cell populations in the pineal gland. More importantly, our study here characterized, for the first time, the day/night activation of autophagy flux in the rat pineal gland, indicating a potential role of autophagy in regulating melatonin synthesis in the rat pineal gland. These findings emphasized a hypothetical role of day/night autophagy in linking the biological clock with melatonin synthesis. Furthermore, ultrastructure analysis of pinealocytes provided fascinating insights into differences in their intracellular structure between daytime and nighttime. In addition, we also provide a preliminary description of cell-cell communication in the rat pineal gland. In summary, the current study unveils the day/night regulation of autophagy in the rat pineal gland, raising a potential role of autophagy in day/night-regulated melatonin synthesis.
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Affiliation(s)
- Wei Ge
- Key Laboratory of Animal Reproduction and Germplasm Enhancement in Universities of Shandong, College of Life Sciences, Qingdao Agricultural University, Qingdao, China
| | - Zi-Hui Yan
- Key Laboratory of Animal Reproduction and Germplasm Enhancement in Universities of Shandong, College of Life Sciences, Qingdao Agricultural University, Qingdao, China
| | - Lu Wang
- Key Laboratory of Animal Reproduction and Germplasm Enhancement in Universities of Shandong, College of Life Sciences, Qingdao Agricultural University, Qingdao, China
| | - Shao-Jing Tan
- Key Laboratory of Animal Reproduction and Germplasm Enhancement in Universities of Shandong, College of Life Sciences, Qingdao Agricultural University, Qingdao, China
| | - Jing Liu
- Central Laboratory of Qingdao Agricultural University, Qingdao Agricultural University, Qingdao, China
| | - Russel J Reiter
- Department of Cell Systems and Anatomy, Long School of Medicine, UT Health, San Antonio, TX, USA
| | - Shi-Ming Luo
- Key Laboratory of Animal Reproduction and Germplasm Enhancement in Universities of Shandong, College of Life Sciences, Qingdao Agricultural University, Qingdao, China
- State Key Laboratory of Stem Cell and Reproductive Biology, Institute of Zoology, Chinese Academy of Sciences, Beijing, China
- Fertility Preservation Lab, Reproductive Medicine Center, Guangdong Second Provincial General Hospital, Guangzhou, China
| | - Qing-Yuan Sun
- Fertility Preservation Lab, Reproductive Medicine Center, Guangdong Second Provincial General Hospital, Guangzhou, China
| | - Wei Shen
- Key Laboratory of Animal Reproduction and Germplasm Enhancement in Universities of Shandong, College of Life Sciences, Qingdao Agricultural University, Qingdao, China
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Lépinay J, Taragnat C, Dubois JP, Chesneau D, Jockers R, Delagrange P, Bozon V. Negative regulation of melatonin secretion by melatonin receptors in ovine pinealocytes. PLoS One 2021; 16:e0255249. [PMID: 34324562 PMCID: PMC8320996 DOI: 10.1371/journal.pone.0255249] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2021] [Accepted: 07/12/2021] [Indexed: 01/01/2023] Open
Abstract
Melatonin (MLT) is a biological modulator of circadian and seasonal rhythms and reproduction. The photoperiodic information is detected by retinal photoreceptors and transmitted through nerve transmissions to the pineal gland, where MLT is synthesized and secreted at night into the blood. MLT interacts with two G protein-coupled receptors, MT1 and MT2. The aim of our work was to provide evidence for the presence of MLT receptors in the ovine pineal gland and define their involvement on melatonin secretion. For the first time, we identified the expression of MLT receptors with the specific 2-[125I]-MLT agonistic radioligand in ovin pinealocytes. The values of Kd and Bmax are 2.24 ± 1.1 nM and 20 ± 6.8 fmol/mg. MLT receptors are functional and inhibit cAMP production and activate ERK1/2 through pertussis toxin-sensitive Gi/o proteins. The MLT receptor antagonist/ inverse agonist luzindole increased cAMP production (189 ± 30%) and MLT secretion (866 ± 13%). The effect of luzindole on MLT secretion was additive with the effect of well-described activators of this pathway such as the β-adrenergic agonist isoproterenol and the α-adrenergic agonist phenylephrine. Co-incubation of all three compounds increased MLT secretion by 1236 ± 199%. These results suggest that MLT receptors are involved in the negative regulation of the synthesis of its own ligand in pinealocytes. While adrenergic receptors promote MLT secretion, MLT receptors mitigate this effect to limit the quantity of MLT secreted by the pineal gland.
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Affiliation(s)
- Julie Lépinay
- Physiologie de la Reproduction et des Comportements, Université de Tours, Nouzilly, France
| | - Catherine Taragnat
- Physiologie de la Reproduction et des Comportements, Université de Tours, Nouzilly, France
| | - Jean-Philippe Dubois
- Physiologie de la Reproduction et des Comportements, Université de Tours, Nouzilly, France
| | - Didier Chesneau
- Physiologie de la Reproduction et des Comportements, Université de Tours, Nouzilly, France
| | - Ralf Jockers
- Université de Paris, Institut Cochin, INSERM, CNRS, Paris, France
| | | | - Véronique Bozon
- Physiologie de la Reproduction et des Comportements, Université de Tours, Nouzilly, France
- * E-mail:
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Xu L, Li G, Tang X, Feng C, Li M, Jiang X, Gu Y, Yun Y, Lu L, Feng X, Ding X, Sun B. MiR-375-3p mediates reduced pineal function in hypoxia-ischemia brain damage. Exp Neurol 2021; 344:113814. [PMID: 34280452 DOI: 10.1016/j.expneurol.2021.113814] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2020] [Revised: 06/21/2021] [Accepted: 07/14/2021] [Indexed: 10/20/2022]
Abstract
The functional roles of microRNAs (miRNAs) have been studied in various diseases, including hypoxic-ischemic brain damage (HIBD). However, changes in the expression of miRNAs and the underlying mechanisms in the pineal gland during HIBD remain unknown. Based on the previous study by microRNA array, hundreds of miRNAs showed altered expression patterns in the pineal gland in a rat model of HIBD. MiR-375-3p was found to be significantly upregulated and abundant in the pineal gland. Further investigation in an in vitro HI model of pinealocytes showed that miRNA-375 exacerbated the damage to pineal function. After oxygen-glucose deprivation / reoxygenation (OGD/R), miR-375-3p expression increased, while aralkylamine N-acetyltransferase (AANAT) expression and melatonin (MT) secretion decreased. Overexpression of miRNA-375 in pinealocytes aggravated the influence of OGD/R on AANAT expression and MT secretion. Because miRNA-375 overexpression in pinealocytes induced decreased rasd1 mRNA and protein expression, rasd1 may mediate the effect of miR-375-3p on pineal function. Furthermore, miR-375-3p aggravated the cognitive impairment caused by HIBD in rats, as observed by Morris water maze test, and also affected emotion and circadian rhythm in HIBD-treated rats. Thus, miR-375-3p may be a key regulatory molecule in the pineal gland following HIBD, and targeting of miR-375-3p may represent a new strategy for the treatment of HIBD.
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Affiliation(s)
- Lixiao Xu
- Institute of Pediatric Research, Children's Hospital of Soochow University, Suzhou 215000, China
| | - Gen Li
- Institute of Pediatric Research, Children's Hospital of Soochow University, Suzhou 215000, China
| | - Xiaojuan Tang
- Department of Neonatology, Children's Hospital of Soochow University, Suzhou 215000, China
| | - Chenxi Feng
- Institute of Pediatric Research, Children's Hospital of Soochow University, Suzhou 215000, China
| | - Mei Li
- Institute of Pediatric Research, Children's Hospital of Soochow University, Suzhou 215000, China
| | - Xiaolu Jiang
- Department of Neonatology, Children's Hospital of Soochow University, Suzhou 215000, China
| | - Yan Gu
- Department of Neonatology, Children's Hospital of Soochow University, Suzhou 215000, China
| | - Yajing Yun
- Department of Neonatology, Children's Hospital of Soochow University, Suzhou 215000, China
| | - Lianghua Lu
- Department of Neonatology, Children's Hospital of Soochow University, Suzhou 215000, China
| | - Xing Feng
- Department of Neonatology, Children's Hospital of Soochow University, Suzhou 215000, China
| | - Xin Ding
- Department of Neonatology, Children's Hospital of Soochow University, Suzhou 215000, China.
| | - Bin Sun
- Department of Neonatology, Children's Hospital of Soochow University, Suzhou 215000, China.
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Lin CH, Chiu CC, Lane HY. Trough Melatonin Levels Differ between Early and Late Phases of Alzheimer Disease. CLINICAL PSYCHOPHARMACOLOGY AND NEUROSCIENCE 2021; 19:135-144. [PMID: 33508797 PMCID: PMC7851471 DOI: 10.9758/cpn.2021.19.1.135] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/07/2020] [Revised: 07/22/2020] [Accepted: 07/30/2020] [Indexed: 12/20/2022]
Abstract
Objective Melatonin has been considered to have an essential role in the pathophysiology of Alzheimer’s disease (AD) for its regulatory function on circadian rhythm and interaction with glutamate for the modulation of learning and memory. Previous studies revealed that melatonin levels decreased in patients with AD. However, melatonin supplement didn’t show promising efficacy for AD. This study compared trough melatonin levels among elderly people with different severities of cognitive deficits. Methods We enrolled 270 elder individuals (consisting four groups healthy elderly, amnestic mild cognitive impairment [MCI], mild AD, and moderate-severe AD) in the learning cohort. Trough melatonin levels in plasma were measured using ELISA. Cognitive function was evaluated by Clinical Dementia Rating Scale (CDR) and Mini-Mental State Examination (MMSE). An independent testing cohort, also consisting of four groups, was enrolled for ascertainment. Results In the learning cohort, trough melatonin levels decreased in the MCI group but elevated in the mild and moderate to severe AD groups. Trough melatonin levels were associated with CDR and MMSE in MCI or AD patients significantly. In the testing cohort, the results were similar to those in the learning cohort. Conclusion This study demonstrated that trough melatonin levels in the peripheral blood were decreased in MCI but increased with the severity of AD. The finding supports the trials indicating that melatonin showed efficacy only in MCI but not in AD. Whether trough melatonin level has potential to be a treatment response biomarker for AD, especially its early phase needs further studies.
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Affiliation(s)
- Chieh-Hsin Lin
- Department of Psychiatry, Kaohsiung Chang Gung Memorial Hospital, Chang Gung University College of Medicine, Kaohsiung, Taiwan.,Graduate Institute of Biomedical Sciences, China Medical University, Taichung, Taipei, Taiwan.,School of Medicine, Chang Gung University, Taoyuan, Taiwan
| | - Chih-Chiang Chiu
- Department of Psychiatry, Taipei City Psychiatric Center, Taipei, Taiwan.,Department of Psychiatry, School of Medicine, Taipei Medical University, Taipei, Taiwan
| | - Hsien-Yuan Lane
- Graduate Institute of Biomedical Sciences, China Medical University, Taichung, Taipei, Taiwan.,Department of Psychiatry and Brain Disease Research Center, China Medical University Hospital, Taichung, Taiwan.,Department of Psychology, College of Medical and Health Sciences, Asia University, Taichung, Taiwan
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Hadoush H, Alqudah A, Banihani SA, Al-Jarrah M, Amro A, Aldajah S. Melatonin serum level, sleep functions, and depression level after bilateral anodal transcranial direct current stimulation in patients with Parkinson's disease: a feasibility study. Sleep Sci 2021; 14:25-30. [PMID: 34917270 PMCID: PMC8663735 DOI: 10.5935/1984-0063.20200083] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2020] [Accepted: 11/16/2020] [Indexed: 12/21/2022] Open
Abstract
Objective Parkinson's disease (PD) is associated with non-motor complications such as sleep disturbance and depression. Transcranial direct current stimulation (tDCS) showed therapeutic effects on the motor dysfunctions. However, the potential effects of tDCS therapy on melatonin hormone, sleep dysfunctions, and depression in patients with PD still unclear. This feasibility study aimed to identify any potential changes in melatonin serum level, sleep functions and depression after the bilateral anodal tDCS in patients with PD. Material and Methods Tensessions of bilateral anodal tDCS stimulation applied over left and right prefrontal and motor areas were given to twenty-five patients with PD. Melatonin serum level, Pittsburgh sleep quality index, and geriatric depression scale examined before and after tDCS stimulation. Results After bilateral anodal tDCS, there was a significant reduction in melatonin serum level, improvement in depression, improvements in overall sleep quality, and sleep latency. Correlations test showed significant associations between melatonin serum level reduction and changes in subjective sleep quality, and sleep duration, as well as between improvements in depression and overall sleep quality, sleep latency, and sleep disturbance. Conclusion Bilateral anodal tDCS therapy was a feasible and safe tool that showed potential therapeutic effects on melatonin serum level, sleep quality, and depression level in patients with PD. Although the further large scale and randomized-control trial studies are crucially needed, there is still a need for such a feasibility study to be established before such trials can be implemented as is recommended in the new medical research council guidelines.
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Affiliation(s)
- Hikmat Hadoush
- Jordan University of Science and Technology, Rehabilitation Sciences -Irbid - Irbid - Jordan
| | - Ansam Alqudah
- Jordan University of Science and Technology, Rehabilitation Sciences -Irbid - Irbid - Jordan
| | - Saleem A Banihani
- Jordan University of Science and Technology, Medical Laboratory Sciences - Irbid - Irbid - Jordan
| | - Muhammed Al-Jarrah
- Jordan University of Science and Technology, Rehabilitation Sciences -Irbid - Irbid - Jordan
| | - Akram Amro
- Al-Quds University, Physiotherapy - Jerusalem - Jerusalem - Palestinian Territories
| | - Salameh Aldajah
- Isra University, Rehabilitation Sciences -Amman - Amman - Jordan
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Gernert C, Falkai P, Falter-Wagner CM. The Generalized Adaptation Account of Autism. Front Neurosci 2020; 14:534218. [PMID: 33122985 PMCID: PMC7573117 DOI: 10.3389/fnins.2020.534218] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2020] [Accepted: 09/15/2020] [Indexed: 12/12/2022] Open
Abstract
The heterogeneous phenomenology of autism together with diverse patterns of comorbidities led in the past to formulation of manifold theories and hypotheses on different explanatory levels. We scrutinize most recent findings from genetics, neurobiology and physiology and derive testable hypotheses about possible physiological links between domains. With focus on altered sensory perception and neuronal processing in ASD, we assume two intertwined regulatory feedback circuits under the umbrella of genetics and environmental factors. Both regulatory circuits are highly variable between individuals in line with the heterogeneous spectrum of ASD. The circuits set off from altered pathways and connectivity in ASD, fueling HPA-axis activity and distress. In the first circuit altered tryptophan metabolism leads to higher neurotoxic substances and reinforces the excitation:inhibition imbalance in the brain. The second circuit focuses on the impact and interaction with the environment and its rhythms in ASD. With lower melatonin levels, as the pacemaker molecule of the circadian system, we assume misalignment to outer and inner states corroborated from the known comorbidities in ASD. Alterations of the microbiome composition in ASD are supposed to act as a regulatory linking factor for both circuits. Overall, we assume that altered internal balance on cellular and neurophysiological levels is one of the main reasons leading to a lower ability in ASD to adapt to the environment and own internal changing states, leading to the conceptualization of autism as a condition of generalized imbalance in adaptation. This comprehensive framework opens up new perspectives on possible intervention and prevention strategies.
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Affiliation(s)
- Clara Gernert
- Department of Psychiatry, Medical Faculty, LMU Munich, Munich, Germany
| | - Peter Falkai
- Department of Psychiatry, Medical Faculty, LMU Munich, Munich, Germany
| | - Christine M Falter-Wagner
- Department of Psychiatry, Medical Faculty, LMU Munich, Munich, Germany.,Department of Psychology, University of Cologne, Cologne, Germany
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11
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Anderson G, Reiter RJ. Melatonin: Roles in influenza, Covid-19, and other viral infections. Rev Med Virol 2020; 30:e2109. [PMID: 32314850 PMCID: PMC7235470 DOI: 10.1002/rmv.2109] [Citation(s) in RCA: 136] [Impact Index Per Article: 34.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2020] [Revised: 04/01/2020] [Accepted: 04/02/2020] [Indexed: 12/11/2022]
Abstract
There is a growing appreciation that the regulation of the melatonergic pathways, both pineal and systemic, may be an important aspect in how viruses drive the cellular changes that underpin their control of cellular function. We review the melatonergic pathway role in viral infections, emphasizing influenza and covid-19 infections. Viral, or preexistent, suppression of pineal melatonin disinhibits neutrophil attraction, thereby contributing to an initial "cytokine storm", as well as the regulation of other immune cells. Melatonin induces the circadian gene, Bmal1, which disinhibits the pyruvate dehydrogenase complex (PDC), countering viral inhibition of Bmal1/PDC. PDC drives mitochondrial conversion of pyruvate to acetyl-coenzyme A (acetyl-CoA), thereby increasing the tricarboxylic acid cycle, oxidative phosphorylation, and ATP production. Pineal melatonin suppression attenuates this, preventing the circadian "resetting" of mitochondrial metabolism. This is especially relevant in immune cells, where shifting metabolism from glycolytic to oxidative phosphorylation, switches cells from reactive to quiescent phenotypes. Acetyl-CoA is a necessary cosubstrate for arylalkylamine N-acetyltransferase, providing an acetyl group to serotonin, and thereby initiating the melatonergic pathway. Consequently, pineal melatonin regulates mitochondrial melatonin and immune cell phenotype. Virus- and cytokine-storm-driven control of the pineal and mitochondrial melatonergic pathway therefore regulates immune responses. Virus-and cytokine storm-driven changes also increase gut permeability and dysbiosis, thereby suppressing levels of the short-chain fatty acid, butyrate, and increasing circulating lipopolysaccharide (LPS). The alterations in butyrate and LPS can promote viral replication and host symptom severity via impacts on the melatonergic pathway. Focussing on immune regulators has treatment implications for covid-19 and other viral infections.
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Affiliation(s)
| | - Russel J. Reiter
- Department of Cellular and Structural BiologyUniversity of Texas Health Science at San AntonioSan Antonio, Texas
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12
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Lumsden SC, Clarkson AN, Cakmak YO. Neuromodulation of the Pineal Gland via Electrical Stimulation of Its Sympathetic Innervation Pathway. Front Neurosci 2020; 14:264. [PMID: 32300290 PMCID: PMC7145358 DOI: 10.3389/fnins.2020.00264] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2019] [Accepted: 03/09/2020] [Indexed: 12/11/2022] Open
Abstract
Stimulation of the pineal gland via its sympathetic innervation pathway results in the production of N-acetylserotonin and melatonin. Melatonin has many therapeutic roles and is heavily implicated in the regulation of the sleep-wake cycle. In addition, N-acetylserotonin has recently been reported to promote neurogenesis in the brain. Upregulation of these indoleamines is possible via neuromodulation of the pineal gland. This is achieved by electrical stimulation of structures or fibres in the pineal gland sympathetic innervation pathway. Many studies have performed such pineal neuromodulation using both invasive and non-invasive methods. However, the effects of various experimental variables and stimulation paradigms has not yet been reviewed and evaluated. This review summarises these studies and presents the optimal experimental protocols and stimulation parameters necessary for maximal upregulation of melatonin metabolic output.
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Affiliation(s)
- Susannah C. Lumsden
- Department of Anatomy, University of Otago, Dunedin, New Zealand
- Brain Health Research Centre, Dunedin, New Zealand
| | - Andrew N. Clarkson
- Department of Anatomy, University of Otago, Dunedin, New Zealand
- Brain Research New Zealand, Dunedin, New Zealand
- Medical Technologies Centre of Research Excellence, Auckland, New Zealand
| | - Yusuf Ozgur Cakmak
- Department of Anatomy, University of Otago, Dunedin, New Zealand
- Brain Health Research Centre, Dunedin, New Zealand
- Medical Technologies Centre of Research Excellence, Auckland, New Zealand
- Centre for Health Systems and Technology, Dunedin, New Zealand
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13
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Dhangar RR, Kale PP, Kadu PK, Prabhavalkar K. Possible Benefits of Considering Glutamate with Melatonin or Orexin or Oxytocin as a Combination Approach in the Treatment of Anxiety. ACTA ACUST UNITED AC 2019. [DOI: 10.1007/s40495-019-00207-3] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
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14
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Mays JC, Kelly MC, Coon SL, Holtzclaw L, Rath MF, Kelley MW, Klein DC. Single-cell RNA sequencing of the mammalian pineal gland identifies two pinealocyte subtypes and cell type-specific daily patterns of gene expression. PLoS One 2018; 13:e0205883. [PMID: 30347410 PMCID: PMC6197868 DOI: 10.1371/journal.pone.0205883] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2018] [Accepted: 10/03/2018] [Indexed: 12/31/2022] Open
Abstract
The vertebrate pineal gland is dedicated to the production of the hormone melatonin, which increases at night to influence circadian and seasonal rhythms. This increase is associated with dramatic changes in the pineal transcriptome. Here, single-cell analysis of the rat pineal transcriptome was approached by sequencing mRNA from ~17,000 individual pineal cells, with the goals of profiling the cells that comprise the pineal gland and examining the proposal that there are two distinct populations of pinealocytes differentiated by the expression of Asmt, which encodes the enzyme that converts N-acetylserotonin to melatonin. In addition, this analysis provides evidence of cell-specific time-of-day dependent changes in gene expression. Nine transcriptomically distinct cell types were identified: ~90% were classified as melatonin-producing α- and β-pinealocytes (1:19 ratio). Non-pinealocytes included three astrocyte subtypes, two microglia subtypes, vascular and leptomeningeal cells, and endothelial cells. α-Pinealocytes were distinguished from β-pinealocytes by ~3-fold higher levels of Asmt transcripts. In addition, α-pinealocytes have transcriptomic differences that likely enhance melatonin formation by increasing the availability of the Asmt cofactor S-adenosylmethionine, resulting from increased production of a precursor of S-adenosylmethionine, ATP. These transcriptomic differences include ~2-fold higher levels of the ATP-generating oxidative phosphorylation transcriptome and ~8-fold lower levels of the ribosome transcriptome, which is expected to reduce the consumption of ATP by protein synthesis. These findings suggest that α-pinealocytes have a specialized role in the pineal gland: efficiently O-methylating the N-acetylserotonin produced and released by β-pinealocytes, thereby improving the overall efficiency of melatonin synthesis. We have also identified transcriptomic changes that occur between night and day in seven cell types, the majority of which occur in β-pinealocytes and to a lesser degree in α-pinealocytes; many of these changes were mimicked by adrenergic stimulation with isoproterenol. The cellular heterogeneity of the pineal gland as revealed by this study provides a new framework for understanding pineal cell biology at single-cell resolution.
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Affiliation(s)
- Joseph C. Mays
- Section on Developmental Neuroscience, Laboratory of Cochlear Development, Division of Intramural Research, National Institute on Deafness and Other Communication Disorders, National Institutes of Health, Bethesda, Maryland, United States of America
| | - Michael C. Kelly
- Section on Developmental Neuroscience, Laboratory of Cochlear Development, Division of Intramural Research, National Institute on Deafness and Other Communication Disorders, National Institutes of Health, Bethesda, Maryland, United States of America
| | - Steven L. Coon
- Molecular Genomics Core Facility, Office of the Scientific Director, Intramural Research Program, Eunice Kennedy Shriver National Institute of Child Health and Human Development, National Institutes of Health, Bethesda, Maryland, United States of America
| | - Lynne Holtzclaw
- Microscopy and Imaging Core, Office of the Scientific Director, Intramural Research Program, Eunice Kennedy Shriver National Institute of Child Health and Human Development, National Institutes of Health, Bethesda, Maryland, United States of America
| | - Martin F. Rath
- Department of Neuroscience, Panum Institute, University of Copenhagen, Copenhagen, Denmark
| | - Matthew W. Kelley
- Section on Developmental Neuroscience, Laboratory of Cochlear Development, Division of Intramural Research, National Institute on Deafness and Other Communication Disorders, National Institutes of Health, Bethesda, Maryland, United States of America
| | - David C. Klein
- Office of the Scientific Director, Intramural Research Program, Eunice Kennedy Shriver National Institute of Child Health and Human Development, National Institutes of Health, Bethesda, Maryland, United States of America
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15
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Abrahão MV, Dos Santos NFT, Kuwabara WMT, do Amaral FG, do Carmo Buonfiglio D, Peres R, Vendrame RFA, Flávio da Silveira P, Cipolla-Neto J, Baltatu OC, Afeche SC. Identification of insulin-regulated aminopeptidase (IRAP) in the rat pineal gland and the modulation of melatonin synthesis by angiotensin IV. Brain Res 2018; 1704:40-46. [PMID: 30222958 DOI: 10.1016/j.brainres.2018.09.015] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2018] [Revised: 08/29/2018] [Accepted: 09/11/2018] [Indexed: 02/06/2023]
Abstract
A local renin-angiotensin system (RAS) has been postulated in the pineal gland. In addition to angiotensin II (Ang II), other active metabolites have been described. In this study, we aimed to investigate a role for Ang IV in melatonin synthesis and the presence of its proposed (IRAP)/AT4 receptor (insulin-regulated aminopeptidase) in the pineal gland. The effect of Ang IV on melatonin synthesis was investigated in vitro using isolated pinealocytes. IRAP protein expression and activity were evaluated by Western blot and fluorimetry using Leu-4Me-β-naphthylamide as a substrate. Melatonin was analyzed by HPLC, calcium content by confocal microscopy and cAMP by immunoassay. Ang IV significantly augmented the NE-induced melatonin synthesis to a similar degree as that achieved by Ang II. This Ang IV effect in pinealocytes appears to be mediated by an increase in the intracellular calcium content but not by cAMP. The (IRAP)/AT4 expression and activity were identified in the pineal gland, which were significantly higher in membrane fractions than in soluble fractions. Ang IV significantly reduced IRAP activity in the pineal membrane fractions. The main findings of the present study are as follows: (1) Ang IV potentiates NE-stimulated melatonin production in pinealocytes, (2) the (IRAP)/AT4 receptor is present in the rat pineal gland, and (3) Ang IV inhibits IRAP activity and increases pinealocytes [Ca2+]i. We conclude that Ang IV is an important component of RAS and modulates melatonin synthesis in the rat pineal gland.
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Affiliation(s)
| | | | - Wilson Mitsuo Tatagiba Kuwabara
- Department of Physiology and Biophysics, Institute of Biomedical Sciences, University of São Paulo, 05508-900 São Paulo, SP, Brazil
| | - Fernanda Gaspar do Amaral
- Department of Physiology and Biophysics, Institute of Biomedical Sciences, University of São Paulo, 05508-900 São Paulo, SP, Brazil; Department of Physiology, Federal University of São Paulo, 04023-901 São Paulo, SP, Brazil
| | - Daniella do Carmo Buonfiglio
- Department of Physiology and Biophysics, Institute of Biomedical Sciences, University of São Paulo, 05508-900 São Paulo, SP, Brazil
| | - Rafael Peres
- Department of Physiology and Biophysics, Institute of Biomedical Sciences, University of São Paulo, 05508-900 São Paulo, SP, Brazil
| | | | | | - José Cipolla-Neto
- Department of Physiology and Biophysics, Institute of Biomedical Sciences, University of São Paulo, 05508-900 São Paulo, SP, Brazil
| | - Ovidiu Constantin Baltatu
- Center of Innovation, Technology and Education (CITE), Anhembi Morumbi University-Laureate International Universities, 12247-016 São José dos Campos, SP, Brazil
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16
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Tan DX, Xu B, Zhou X, Reiter RJ. Pineal Calcification, Melatonin Production, Aging, Associated Health Consequences and Rejuvenation of the Pineal Gland. Molecules 2018; 23:E301. [PMID: 29385085 PMCID: PMC6017004 DOI: 10.3390/molecules23020301] [Citation(s) in RCA: 105] [Impact Index Per Article: 17.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2018] [Revised: 01/24/2018] [Accepted: 01/26/2018] [Indexed: 01/26/2023] Open
Abstract
The pineal gland is a unique organ that synthesizes melatonin as the signaling molecule of natural photoperiodic environment and as a potent neuronal protective antioxidant. An intact and functional pineal gland is necessary for preserving optimal human health. Unfortunately, this gland has the highest calcification rate among all organs and tissues of the human body. Pineal calcification jeopardizes melatonin's synthetic capacity and is associated with a variety of neuronal diseases. In the current review, we summarized the potential mechanisms of how this process may occur under pathological conditions or during aging. We hypothesized that pineal calcification is an active process and resembles in some respects of bone formation. The mesenchymal stem cells and melatonin participate in this process. Finally, we suggest that preservation of pineal health can be achieved by retarding its premature calcification or even rejuvenating the calcified gland.
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Affiliation(s)
- Dun Xian Tan
- Department of Cell Systems & Anatomy, UT Health San Antonio, San Antonio, TX 78229, USA.
| | - Bing Xu
- Department of Cell Systems & Anatomy, UT Health San Antonio, San Antonio, TX 78229, USA.
| | - Xinjia Zhou
- Department of Cell Systems & Anatomy, UT Health San Antonio, San Antonio, TX 78229, USA.
| | - Russel J Reiter
- Department of Cell Systems & Anatomy, UT Health San Antonio, San Antonio, TX 78229, USA.
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17
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Yelamanchi SD, Kumar M, Madugundu AK, Gopalakrishnan L, Dey G, Chavan S, Sathe G, Mathur PP, Gowda H, Mahadevan A, Shankar SK, Prasad TSK. Characterization of human pineal gland proteome. MOLECULAR BIOSYSTEMS 2017; 12:3622-3632. [PMID: 27714013 DOI: 10.1039/c6mb00507a] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
The pineal gland is a neuroendocrine gland located at the center of the brain. It is known to regulate various physiological functions in the body through secretion of the neurohormone melatonin. Comprehensive characterization of the human pineal gland proteome has not been undertaken to date. We employed a high-resolution mass spectrometry-based approach to characterize the proteome of the human pineal gland. A total of 5874 proteins were identified from the human pineal gland in this study. Of these, 5820 proteins were identified from the human pineal gland for the first time. Interestingly, 1136 proteins from the human pineal gland were found to contain a signal peptide domain, which indicates the secretory nature of these proteins. An unbiased global proteomic profile of this biomedically important organ should benefit molecular research to unravel the role of the pineal gland in neuropsychiatric and neurodegenerative diseases.
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Affiliation(s)
- Soujanya D Yelamanchi
- Institute of Bioinformatics, International Technology Park, Bangalore 560 066, India. and School of Biotechnology, KIIT University, Bhubaneswar 751 024, India.
| | - Manish Kumar
- Institute of Bioinformatics, International Technology Park, Bangalore 560 066, India. and Manipal University, Madhav Nagar, Manipal 576 104, India
| | - Anil K Madugundu
- Institute of Bioinformatics, International Technology Park, Bangalore 560 066, India. and Centre for Bioinformatics, Pondicherry University, Puducherry 605 014, India
| | | | - Gourav Dey
- Institute of Bioinformatics, International Technology Park, Bangalore 560 066, India. and Manipal University, Madhav Nagar, Manipal 576 104, India
| | - Sandip Chavan
- Institute of Bioinformatics, International Technology Park, Bangalore 560 066, India. and Manipal University, Madhav Nagar, Manipal 576 104, India
| | - Gajanan Sathe
- Institute of Bioinformatics, International Technology Park, Bangalore 560 066, India. and Manipal University, Madhav Nagar, Manipal 576 104, India
| | - Premendu P Mathur
- School of Biotechnology, KIIT University, Bhubaneswar 751 024, India. and Centre for Bioinformatics, Pondicherry University, Puducherry 605 014, India
| | - Harsha Gowda
- Institute of Bioinformatics, International Technology Park, Bangalore 560 066, India. and School of Biotechnology, KIIT University, Bhubaneswar 751 024, India. and YU-IOB Center for Systems Biology and Molecular Medicine, Yenepoya University, Mangalore 575 018, India
| | - Anita Mahadevan
- Department of Neuropathology, National Institute of Mental Health and Neuro Sciences, Bangalore 560 029, India. and Human Brain Tissue Repository, Neurobiology Research Centre, National Institute of Mental Health and Neuro Sciences, Bangalore 560 029, India
| | - Susarla K Shankar
- Department of Neuropathology, National Institute of Mental Health and Neuro Sciences, Bangalore 560 029, India. and Human Brain Tissue Repository, Neurobiology Research Centre, National Institute of Mental Health and Neuro Sciences, Bangalore 560 029, India and Proteomics and Bioinformatics Laboratory, Neurobiology Research Centre, National Institute of Mental Health and Neuro Sciences, Bangalore 560 029, India
| | - T S Keshava Prasad
- Institute of Bioinformatics, International Technology Park, Bangalore 560 066, India. and YU-IOB Center for Systems Biology and Molecular Medicine, Yenepoya University, Mangalore 575 018, India and Proteomics and Bioinformatics Laboratory, Neurobiology Research Centre, National Institute of Mental Health and Neuro Sciences, Bangalore 560 029, India
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18
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Medeiros de Mesquita LS, Garcia RCT, Amaral FG, Peres R, Wood SM, Lucena RDL, Frare EO, Abrahão MV, Marcourakis T, Cipolla-Neto J, Afeche SC. The muscarinic effect of anhydroecgonine methyl ester, a crack cocaine pyrolysis product, impairs melatonin synthesis in the rat pineal gland. Toxicol Res (Camb) 2017; 6:420-431. [PMID: 30090510 PMCID: PMC6060695 DOI: 10.1039/c7tx00009j] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2017] [Accepted: 03/27/2017] [Indexed: 11/21/2022] Open
Abstract
Anhydroecgonine methyl ester (AEME), also called methylecgonidine, is a pyrolysis product of crack cocaine that is neurotoxic and potentiates cocaine-induced sensitization. The sensitization induced by drugs of abuse can be influenced by melatonin, a neuroprotective pineal hormone. In the same way, drugs of abuse like alcohol and methamphetamine can modify melatonin synthesis. The aim of the present work was to investigate the AEME effects on melatonin synthesis in the rat pineal gland. Neurotransmitter systems involved in its effects, antioxidant enzyme activities and the melatonin protective role in AEME-induced toxicity were also evaluated. The animals were injected with AEME i.p. (1.12 mg per kg of body weight per day) or vehicle for 10 consecutive days and the nocturnal pineal melatonin synthesis profile and SOD, GPx and GR activities in the cerebral cortex and hippocampus were assessed. Cultured pineal glands were incubated with AEME for 30 min or 48 h before norepinephrine stimulation and melatonin synthesis, arylalkylamine N-acetyltransferase activity, cAMP and [Ca2+]i were determined. The involvement of cholinergic and glutamatergic systems was analyzed using different antagonists. The protective role of melatonin in AEME toxicity on hippocampal neurons was evaluated by a viability assay. AEME impaired melatonin synthesis both in vivo and in vitro and this effect seems to be mediated by muscarinic receptors and [Ca2+]i elevation. AEME reduced neuronal viability and melatonin was able to protected hippocampal neurons against AEME toxicity. The melatonin synthesis impairment observed could lead to the worsening of the direct AEME neurotoxicity and to the exacerbation of the crack cocaine addiction and sensitization.
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Affiliation(s)
- Lívia Silva Medeiros de Mesquita
- Laboratory of Pharmacology , Butantan Institute , 05503-000 , São Paulo , SP , Brazil . ; ; ; ; ; ; Tel: +55 11 26279741
- Department of Physiology and Biophysics , Institute of Biomedical Sciences , University of São Paulo , 05508-900 , São Paulo , SP , Brazil . ; ;
| | - Raphael Caio Tamborelli Garcia
- Department of Clinical and Toxicological Analysis , School of Pharmaceutical Sciences , University of São Paulo , 05508-900 , São Paulo , SP , Brazil . ; ;
- Institute of Environmental , Chemical and Pharmaceutical Sciences , Federal University of São Paulo , 09972-270 , São Paulo , SP , Brazil
| | - Fernanda Gaspar Amaral
- Department of Physiology and Biophysics , Institute of Biomedical Sciences , University of São Paulo , 05508-900 , São Paulo , SP , Brazil . ; ;
- Department of Physiology , Federal University of São Paulo , 04023-901 , São Paulo , SP , Brazil
| | - Rafael Peres
- Department of Physiology and Biophysics , Institute of Biomedical Sciences , University of São Paulo , 05508-900 , São Paulo , SP , Brazil . ; ;
- University of Hawaii Cancer Center , Clinical & Translational Research Program , 96813 , Honolulu , HI , USA
| | - Simone Miller Wood
- Department of Clinical and Toxicological Analysis , School of Pharmaceutical Sciences , University of São Paulo , 05508-900 , São Paulo , SP , Brazil . ; ;
| | - RodrigoVincenzo de Luca Lucena
- Laboratory of Pharmacology , Butantan Institute , 05503-000 , São Paulo , SP , Brazil . ; ; ; ; ; ; Tel: +55 11 26279741
| | - Eduardo Osório Frare
- Laboratory of Pharmacology , Butantan Institute , 05503-000 , São Paulo , SP , Brazil . ; ; ; ; ; ; Tel: +55 11 26279741
| | - Mariana Vieira Abrahão
- Laboratory of Pharmacology , Butantan Institute , 05503-000 , São Paulo , SP , Brazil . ; ; ; ; ; ; Tel: +55 11 26279741
| | - Tania Marcourakis
- Department of Clinical and Toxicological Analysis , School of Pharmaceutical Sciences , University of São Paulo , 05508-900 , São Paulo , SP , Brazil . ; ;
| | - José Cipolla-Neto
- Department of Physiology and Biophysics , Institute of Biomedical Sciences , University of São Paulo , 05508-900 , São Paulo , SP , Brazil . ; ;
| | - Solange Castro Afeche
- Laboratory of Pharmacology , Butantan Institute , 05503-000 , São Paulo , SP , Brazil . ; ; ; ; ; ; Tel: +55 11 26279741
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Zhang S, Chen S, Li Y, Liu Y. Melatonin as a promising agent of regulating stem cell biology and its application in disease therapy. Pharmacol Res 2016; 117:252-260. [PMID: 28042087 DOI: 10.1016/j.phrs.2016.12.035] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/27/2016] [Revised: 12/22/2016] [Accepted: 12/22/2016] [Indexed: 01/20/2023]
Abstract
Stem cells have emerged as an important approach to repair and regenerate damaged tissues or organs and show great therapeutic potential in a variety of diseases. However, the low survival of engrafted stem cells still remains a major challenge for stem cell therapy. As a major hormone from the pineal gland, melatonin has been shown to play an important role in regulating the physiological and pathological functions of stem cells, such as promoting proliferation, migration and differentiation. Thus, melatonin combined with stem cell transplantation displayed promising application potential in neurodegenerative diseases, liver cirrhosis, wound healing, myocardial infarction, kidney ischemia injury, osteoporosis, etc. It exerts its physiological and pathological functions through its anti-oxidant, anti-inflammatory, anti-apoptosis and anti-ageing properties. Here, we summarize recent advances on exploring the biological role of melatonin in stem cells, and discuss its potential applications in stem cell-based therapy.
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Affiliation(s)
- Shuo Zhang
- College of Pharmacy, Harbin Medical University, Harbin 150081, Heilongjiang Province, China
| | - Simon Chen
- Cumming School of Medicine, University of Calgary, Calgary, Canada
| | - Yuan Li
- College of Pharmacy, Harbin Medical University, Harbin 150081, Heilongjiang Province, China
| | - Yu Liu
- Department of Clinical Laboratory Diagnosis, the Fourth Affiliated Hospital of Harbin Medical University, Harbin 150001, Heilongjiang Province, China.
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20
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Tan DX, Manchester LC, Qin L, Reiter RJ. Melatonin: A Mitochondrial Targeting Molecule Involving Mitochondrial Protection and Dynamics. Int J Mol Sci 2016; 17:ijms17122124. [PMID: 27999288 PMCID: PMC5187924 DOI: 10.3390/ijms17122124] [Citation(s) in RCA: 261] [Impact Index Per Article: 32.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2016] [Revised: 11/28/2016] [Accepted: 12/07/2016] [Indexed: 01/19/2023] Open
Abstract
Melatonin has been speculated to be mainly synthesized by mitochondria. This speculation is supported by the recent discovery that aralkylamine N-acetyltransferase/serotonin N-acetyltransferase (AANAT/SNAT) is localized in mitochondria of oocytes and the isolated mitochondria generate melatonin. We have also speculated that melatonin is a mitochondria-targeted antioxidant. It accumulates in mitochondria with high concentration against a concentration gradient. This is probably achieved by an active transportation via mitochondrial melatonin transporter(s). Melatonin protects mitochondria by scavenging reactive oxygen species (ROS), inhibiting the mitochondrial permeability transition pore (MPTP), and activating uncoupling proteins (UCPs). Thus, melatonin maintains the optimal mitochondrial membrane potential and preserves mitochondrial functions. In addition, mitochondrial biogenesis and dynamics is also regulated by melatonin. In most cases, melatonin reduces mitochondrial fission and elevates their fusion. Mitochondrial dynamics exhibit an oscillatory pattern which matches the melatonin circadian secretory rhythm in pinealeocytes and probably in other cells. Recently, melatonin has been found to promote mitophagy and improve homeostasis of mitochondria.
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Affiliation(s)
- Dun-Xian Tan
- Department of Cell System and Anatomy, The University of Texas Health Science Center, San Antonio, TX 78229, USA.
| | - Lucien C Manchester
- Department of Cell System and Anatomy, The University of Texas Health Science Center, San Antonio, TX 78229, USA.
| | - Lilan Qin
- Department of Cell System and Anatomy, The University of Texas Health Science Center, San Antonio, TX 78229, USA.
| | - Russel J Reiter
- Department of Cell System and Anatomy, The University of Texas Health Science Center, San Antonio, TX 78229, USA.
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21
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Melatoninergic System in Parkinson's Disease: From Neuroprotection to the Management of Motor and Nonmotor Symptoms. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2016; 2016:3472032. [PMID: 27829983 PMCID: PMC5088323 DOI: 10.1155/2016/3472032] [Citation(s) in RCA: 51] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/13/2016] [Accepted: 09/25/2016] [Indexed: 12/13/2022]
Abstract
Melatonin is synthesized by several tissues besides the pineal gland, and beyond its regulatory effects in light-dark cycle, melatonin is a hormone with neuroprotective, anti-inflammatory, and antioxidant properties. Melatonin acts as a free-radical scavenger, reducing reactive species and improving mitochondrial homeostasis. Melatonin also regulates the expression of neurotrophins that are involved in the survival of dopaminergic neurons and reduces α-synuclein aggregation, thus protecting the dopaminergic system against damage. The unbalance of pineal melatonin synthesis can predispose the organism to inflammatory and neurodegenerative diseases such as Parkinson's disease (PD). The aim of this review is to summarize the knowledge about the potential role of the melatoninergic system in the pathogenesis and treatment of PD. The literature reviewed here indicates that PD is associated with impaired brain expression of melatonin and its receptors MT1 and MT2. Exogenous melatonin treatment presented an outstanding neuroprotective effect in animal models of PD induced by different toxins, such as 6-hydroxydopamine (6-OHDA), 1-methyl-4-phenyl-1,2,3,6-tetrahydropyridine (MPTP), rotenone, paraquat, and maneb. Despite the neuroprotective effects and the improvement of motor impairments, melatonin also presents the potential to improve nonmotor symptoms commonly experienced by PD patients such as sleep and anxiety disorders, depression, and memory dysfunction.
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Villela D, de Sá Lima L, Peres R, Peliciari-Garcia RA, do Amaral FG, Cipolla-Neto J, Scavone C, Afeche SC. Norepinephrine activates NF-κB transcription factor in cultured rat pineal gland. Life Sci 2014; 94:122-9. [DOI: 10.1016/j.lfs.2013.11.004] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2013] [Revised: 10/17/2013] [Accepted: 11/02/2013] [Indexed: 01/26/2023]
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