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Mendes L, Queiroz M, Sena CM. Melatonin and Vascular Function. Antioxidants (Basel) 2024; 13:747. [PMID: 38929187 PMCID: PMC11200504 DOI: 10.3390/antiox13060747] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2024] [Revised: 06/12/2024] [Accepted: 06/17/2024] [Indexed: 06/28/2024] Open
Abstract
The indolamine hormone melatonin, also known as N-acetyl-5-methoxytrypamine, is frequently associated with circadian rhythm regulation. Light can suppress melatonin secretion, and photoperiod regulates melatonin levels by promoting its production and secretion at night in response to darkness. This hormone is becoming more and more understood for its functions as an immune-modulatory, anti-inflammatory, and antioxidant hormone. Melatonin may have a major effect on several diabetes-related disturbances, such as hormonal imbalances, oxidative stress, sleep disturbances, and mood disorders, according to recent research. This has raised interest in investigating the possible therapeutic advantages of melatonin in the treatment of diabetic complications. In addition, several studies have described that melatonin has been linked to the development of diabetes, cancer, Alzheimer's disease, immune system disorders, and heart diseases. In this review, we will highlight some of the functions of melatonin regarding vascular biology.
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Affiliation(s)
| | | | - Cristina M. Sena
- Institute of Physiology, iCBR, Faculty of Medicine, University of Coimbra, 3000-548 Coimbra, Portugal
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2
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Petrović D, Ilić MD, Simonović D, Stojanović M, Stanković M, Stanišić S, Stojanović S, Arsić N, Sokolović DT. The role of melatonin in preventing amiodarone-induced rat liver damage. Can J Physiol Pharmacol 2024; 102:374-382. [PMID: 38079620 DOI: 10.1139/cjpp-2023-0253] [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: 02/02/2024]
Abstract
Long-term exposure to amiodarone, an antiarrhythmic drug, can induce different organ damage, including liver. Cell damage included by amiodarone is a consequence of mitochondrial damage, reactive oxygen species production, and cell energy depletion leading to programmed cell death. In the present study, hepatoprotective potential of neurohormone melatonin (50 mg/kg/day) was evaluated in a chronic experimental model of liver damage induced by a 4-week application of amiodarone (70 mg/kg/day). The obtained results indicate that amiodarone induces an increase in xanthine oxidase activity, as well as the content of the lipid and protein oxidatively modified products and p53 levels. Microscopic analysis further corroborated the biochemical findings revealing hepatocyte degeneration, apoptosis, and occasional necrosis, with the activation of Kupffer cells. Coadministration of melatonin and amiodaron prevented an increase in certain damage associated parameters, due to its multiple targets. In conclusion, the application of melatonin together with amiodarone prevented an increase in tissue oxidative damage parameters and moderately prevented liver cell apoptosis, indicating that the damage of hepatocytes provoked by amiodarone supersedes the protective properties of melatonin in a given dose.
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Affiliation(s)
- Dejan Petrović
- Faculty of Medicine, Institute for Treatment and Rehabilitation, University of Niš, Niška Banja, Niš, Serbia
| | - Marina Deljanin Ilić
- Faculty of Medicine, Institute for Treatment and Rehabilitation, University of Niš, Niška Banja, Niš, Serbia
| | - Dejan Simonović
- Institute for Treatment and Rehabilitation, University of Niš, Niška Banja, Niš, Serbia
| | - Milovan Stojanović
- Faculty of Medicine, Institute for Treatment and Rehabilitation, University of Niš, Niška Banja, Niš, Serbia
| | - Milica Stanković
- Institute of Pathology, University Clinical Centre Niš, Niš, Serbia
| | - Slaviša Stanišić
- Department of Obstetrics and Gyanaecology, Faculty of Medicine, University of Pristina, Kosovska Mitrovica, Serbia
| | - Sanja Stojanović
- Faculty of Medicine, Institute for Treatment and Rehabilitation, University of Niš, Niška Banja, Niš, Serbia
| | - Nebojša Arsić
- Dom zdravlja Medveđa, Šetalište 5, 16240 Medveđa, Serbia
| | - Dušan T Sokolović
- Department of Biochemistry, Faculty of Medicine, University of Niš, Niš, Serbia
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Song R, Baker TL, Watters JJ, Kumar S. Obstructive Sleep Apnea-Associated Intermittent Hypoxia-Induced Immune Responses in Males, Pregnancies, and Offspring. Int J Mol Sci 2024; 25:1852. [PMID: 38339130 PMCID: PMC10856042 DOI: 10.3390/ijms25031852] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/27/2023] [Revised: 01/22/2024] [Accepted: 02/01/2024] [Indexed: 02/12/2024] Open
Abstract
Obstructive sleep apnea (OSA), a respiratory sleep disorder associated with cardiovascular diseases, is more prevalent in men. However, OSA occurrence in pregnant women rises to a level comparable to men during late gestation, creating persistent effects on both maternal and offspring health. The exact mechanisms behind OSA-induced cardiovascular diseases remain unclear, but inflammation and oxidative stress play a key role. Animal models using intermittent hypoxia (IH), a hallmark of OSA, reveal several pro-inflammatory signaling pathways at play in males, such as TLR4/MyD88/NF-κB/MAPK, miRNA/NLRP3, and COX signaling, along with shifts in immune cell populations and function. Limited evidence suggests similarities in pregnancies and offspring. In addition, suppressing these inflammatory molecules ameliorates IH-induced inflammation and tissue injury, providing new potential targets to treat OSA-associated cardiovascular diseases. This review will focus on the inflammatory mechanisms linking IH to cardiovascular dysfunction in males, pregnancies, and their offspring. The goal is to inspire further investigations into the understudied populations of pregnant females and their offspring, which ultimately uncover underlying mechanisms and therapeutic interventions for OSA-associated diseases.
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Affiliation(s)
- Ruolin Song
- Department of Comparative Biosciences, School of Veterinary Medicine, University of Wisconsin, Madison, WI 53706, USA; (R.S.); (T.L.B.); (J.J.W.)
| | - Tracy L. Baker
- Department of Comparative Biosciences, School of Veterinary Medicine, University of Wisconsin, Madison, WI 53706, USA; (R.S.); (T.L.B.); (J.J.W.)
| | - Jyoti J. Watters
- Department of Comparative Biosciences, School of Veterinary Medicine, University of Wisconsin, Madison, WI 53706, USA; (R.S.); (T.L.B.); (J.J.W.)
| | - Sathish Kumar
- Department of Comparative Biosciences, School of Veterinary Medicine, University of Wisconsin, Madison, WI 53706, USA; (R.S.); (T.L.B.); (J.J.W.)
- Department of Obstetrics and Gynecology, School of Medicine and Public Health, University of Wisconsin, Madison, WI 53792, USA
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Rai S, Roy G, Hajam YA. Melatonin: a modulator in metabolic rewiring in T-cell malignancies. Front Oncol 2024; 13:1248339. [PMID: 38260850 PMCID: PMC10800968 DOI: 10.3389/fonc.2023.1248339] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2023] [Accepted: 12/04/2023] [Indexed: 01/24/2024] Open
Abstract
Melatonin, (N-acetyl-5-methoxytryptamine) an indoleamine exerts multifaced effects and regulates numerous cellular pathways and molecular targets associated with circadian rhythm, immune modulation, and seasonal reproduction including metabolic rewiring during T cell malignancy. T-cell malignancies encompass a group of hematological cancers characterized by the uncontrolled growth and proliferation of malignant T-cells. These cancer cells exhibit a distinct metabolic adaptation, a hallmark of cancer in general, as they rewire their metabolic pathways to meet the heightened energy requirements and biosynthesis necessary for malignancies is the Warburg effect, characterized by a shift towards glycolysis, even when oxygen is available. In addition, T-cell malignancies cause metabolic shift by inhibiting the enzyme pyruvate Dehydrogenase Kinase (PDK) which in turn results in increased acetyl CoA enzyme production and cellular glycolytic activity. Further, melatonin plays a modulatory role in the expression of essential transporters (Glut1, Glut2) responsible for nutrient uptake and metabolic rewiring, such as glucose and amino acid transporters in T-cells. This modulation significantly impacts the metabolic profile of T-cells, consequently affecting their differentiation. Furthermore, melatonin has been found to regulate the expression of critical signaling molecules involved in T-cell activations, such as CD38, and CD69. These molecules are integral to T-cell adhesion, signaling, and activation. This review aims to provide insights into the mechanism of melatonin's anticancer properties concerning metabolic rewiring during T-cell malignancy. The present review encompasses the involvement of oncogenic factors, the tumor microenvironment and metabolic alteration, hallmarks, metabolic reprogramming, and the anti-oncogenic/oncostatic impact of melatonin on various cancer cells.
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Affiliation(s)
- Seema Rai
- Department of Zoology Guru Ghasidas Vishwavidyalaya, Bilaspur, India
| | - Gunja Roy
- Department of Zoology Guru Ghasidas Vishwavidyalaya, Bilaspur, India
| | - Younis Ahmad Hajam
- Department of Life Sciences and Allied Health Sciences, Sant Bhag Singh University, Jalandhar, India
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Tokuyama-Toda R, Umeki H, Okubo M, Terada-Ito C, Yudo T, Ide S, Tadokoro S, Shimozuma M, Satomura K. The Preventive Effect of Melatonin on Radiation-Induced Oral Mucositis. Cells 2023; 12:2178. [PMID: 37681910 PMCID: PMC10487273 DOI: 10.3390/cells12172178] [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: 08/10/2023] [Revised: 08/23/2023] [Accepted: 08/29/2023] [Indexed: 09/09/2023] Open
Abstract
Melatonin exerts various physiological effects through melatonin receptors and their ability to scavenge free radicals. Radiotherapy is a common treatment for head and neck tumors, but stomatitis, a side effect affecting irradiated oral mucosa, can impact treatment outcomes. This study investigated the preventive effect of melatonin, a potent free radical scavenger, on radiation-induced oral mucositis. Mice were irradiated with 15 Gy of X-ray radiation to the head and neck, and the oral mucosa was histologically compared between a melatonin-administered group and a control group. The results showed that radiation-induced oral mucositis was suppressed in mice administered melatonin before and after irradiation. It was suggested that the mechanism involved the inhibition of apoptosis and the inhibition of DNA damage. From these findings, we confirmed that melatonin has a protective effect against radiation-induced oral mucositis.
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Affiliation(s)
- Reiko Tokuyama-Toda
- Department of Oral Medicine and Stomatology, School of Dental Medicine, Tsurumi University, 2-1-3, Tsurumi, Tsurumi-ku, Yokohama City 230-8501, Japan; (H.U.); (M.O.); (C.T.-I.); (T.Y.); (S.I.); (S.T.); (M.S.); (K.S.)
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Di W, Jin Z, Lei W, Liu Q, Yang W, Zhang S, Lu C, Xu X, Yang Y, Zhao H. Protection of melatonin treatment and combination with traditional antibiotics against septic myocardial injury. Cell Mol Biol Lett 2023; 28:35. [PMID: 37101253 PMCID: PMC10134561 DOI: 10.1186/s11658-022-00415-8] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2022] [Accepted: 12/23/2022] [Indexed: 04/28/2023] Open
Abstract
BACKGROUND Heart failure is a common complication of sepsis with a high mortality rate. It has been reported that melatonin can attenuate septic injury due to various properties. On the basis of previous reports, this study will further explore the effects and mechanisms of melatonin pretreatment, posttreatment, and combination with antibiotics in the treatment of sepsis and septic myocardial injury. METHODS AND RESULTS Our results showed that melatonin pretreatment showed an obvious protective effect on sepsis and septic myocardial injury, which was related to the attenuation of inflammation and oxidative stress, the improvement of mitochondrial function, the regulation of endoplasmic reticulum stress (ERS), and the activation of the AMPK signaling pathway. In particular, AMPK serves as a key effector for melatonin-initiated myocardial benefits. In addition, melatonin posttreatment also had a certain degree of protection, while its effect was not as remarkable as that of pretreatment. The combination of melatonin and classical antibiotics had a slight but limited effect. RNA-seq detection clarified the cardioprotective mechanism of melatonin. CONCLUSION Altogether, this study provides a theoretical basis for the application strategy and combination of melatonin in septic myocardial injury.
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Affiliation(s)
- Wencheng Di
- Department of Cardiovascular Medicine, National Clinical Research Center for Infectious Disease, Shenzhen Third People's Hospital, 29 Bulan Road, Shenzhen, Guangdong Province, China
| | - Zhenxiao Jin
- Department of Cardiovascular Surgery, Xijing Hospital, The Airforce Military Medical University, 127 Changle West Road, Xi'an, China
| | - Wangrui Lei
- Key Laboratory of Resource Biology and Biotechnology in Western China, Ministry of Education, 229 Taibai North Road, Xi'an, China
- Faculty of Life Sciences and Medicine, Northwest University, 229 Taibai North Road, Xi'an, China
| | - Qiong Liu
- Key Laboratory of Resource Biology and Biotechnology in Western China, Ministry of Education, 229 Taibai North Road, Xi'an, China
- Faculty of Life Sciences and Medicine, Northwest University, 229 Taibai North Road, Xi'an, China
| | - Wenwen Yang
- Key Laboratory of Resource Biology and Biotechnology in Western China, Ministry of Education, 229 Taibai North Road, Xi'an, China
- Faculty of Life Sciences and Medicine, Northwest University, 229 Taibai North Road, Xi'an, China
| | - Shaofei Zhang
- Key Laboratory of Resource Biology and Biotechnology in Western China, Ministry of Education, 229 Taibai North Road, Xi'an, China
- Faculty of Life Sciences and Medicine, Northwest University, 229 Taibai North Road, Xi'an, China
| | - Chenxi Lu
- Key Laboratory of Resource Biology and Biotechnology in Western China, Ministry of Education, 229 Taibai North Road, Xi'an, China
- Faculty of Life Sciences and Medicine, Northwest University, 229 Taibai North Road, Xi'an, China
| | - Xiaoling Xu
- Key Laboratory of Resource Biology and Biotechnology in Western China, Ministry of Education, 229 Taibai North Road, Xi'an, China
- Faculty of Life Sciences and Medicine, Northwest University, 229 Taibai North Road, Xi'an, China
| | - Yang Yang
- Key Laboratory of Resource Biology and Biotechnology in Western China, Ministry of Education, 229 Taibai North Road, Xi'an, China.
- Faculty of Life Sciences and Medicine, Northwest University, 229 Taibai North Road, Xi'an, China.
| | - Huadong Zhao
- Department of General Surgery, Tangdu Hospital, The Airforce Military Medical University, 1 Xinsi Road, Xi'an, China.
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Wang L, Wang W, Han R, Liu Y, Wu B, Luo J. Protective effects of melatonin on myocardial microvascular endothelial cell injury under hypertensive state by regulating Mst1. BMC Cardiovasc Disord 2023; 23:179. [PMID: 37005605 PMCID: PMC10068162 DOI: 10.1186/s12872-023-03159-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2022] [Accepted: 03/01/2023] [Indexed: 04/04/2023] Open
Abstract
BACKGROUND This study explored the protective effects of melatonin on the hypertensive model in myocardial microvascular endothelial cells. METHODS Mouse myocardial microvascular endothelial cells were intervened with angiotensin II to establish hypertensive cell model and divided into control, hypertension (HP), hypertension + adenovirus negative control (HP + Ad-NC), hypertension + adenovirus carrying Mst1 (HP + Ad-Mst1), hypertension + melatonin (HP + MT), hypertension + adenovirus negative control + melatonin (HP + Ad-NC + MT), and hypertension + adenovirus carrying Mst1 + melatonin (HP + Ad-Mst1 + MT) groups. Autophagosomes were observed by transmission electron microscope. Mitochondrial membrane potential was detected by JC-1 staining. Apoptosis was detected by flow cytometry. Oxidative stress markers of MDA, SOD and GSH-PX were measured. The expression of LC3 and p62 was detected by immunofluorescence. Expression levels of Mst1, p-Mst1, Beclin1, LC3, and P62 were detected with Western blot. RESULTS Compared with the control group, the autophagosomes in HP, HP + Ad-Mst1, and HP + Ad-NC groups were significantly reduced. Compared with HP group, the autophagosomes in HP + Ad-Mst1 group were significantly reduced. The apoptosis of HP + MT group was significantly lower than HP group. Compared with HP + Ad-Mst1 group, the apoptosis of HP + Ad-Mst1 + MT group was significantly reduced. The ratio of JC-1 monomer in HP + MT group was significantly lower than HP group. Compared with HP + Ad-Mst1 group, the mitochondrial membrane potential of HP + Ad-Mst1 + MT group was also significantly reduced. MDA content in HP + MT group was significantly reduced, but SOD and GSH-PX activities were significantly increased. Compared with HP + Ad-Mst1 group, MDA content in HP + Ad-Mst1 + MT group was significantly reduced, whereas SOD and GSH-PX activities were increased significantly. Mst1 and p-Mst1 proteins in HP + MT group were significantly reduced. Compared with HP + Ad-Mst1 group, Mst1 and p-Mst1 in HP + Ad-Mst1 + MT group were reduced. P62 level was significantly decreased, while Beclin1 and LC3II levels were significantly increased. P62 in HP + MT group was significantly reduced, while Beclin1 and LC3II were significantly increased. Compared with HP + Ad-Mst1 group, P62 in HP + Ad-Mst1 + MT group was significantly reduced, but Beclin1 and LC3II were significantly increased. CONCLUSION Melatonin may inhibit apoptosis, increase mitochondrial membrane potential, and increase autophagy of myocardial microvascular endothelial cells under hypertensive state via inhibiting Mst1 expression, thereby exerting myocardial protective effect.
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Affiliation(s)
- Lingpeng Wang
- Department of Cardiology, the First Affiliated Hospital, Xinjiang Medical University, Urumqi, 830000, China
| | - Wei Wang
- Department of Internal Medicine, The First Affiliated Hospital, Xinjiang Medical University, No. 137, Liyushan South Road, Urumqi, Xinjiang, 830000, China
| | - Ruimei Han
- Department of Cardiology, Shanghai Xuhui Central Hospital, Shanghai, 200031, China
| | - Yang Liu
- Department of Internal Medicine, The First Affiliated Hospital, Xinjiang Medical University, No. 137, Liyushan South Road, Urumqi, Xinjiang, 830000, China
| | - Bin Wu
- Department of Geriatrics, Xinjiang Military General Hospital, 359 Youhao North Street, Urumqi, Xinjiang, 830000, China.
| | - Jian Luo
- Department of Internal Medicine, The First Affiliated Hospital, Xinjiang Medical University, No. 137, Liyushan South Road, Urumqi, Xinjiang, 830000, China.
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Zilli Vieira CL, Koutrakis P, Liu M, Gottlieb DJ, Garshick E. Intense solar activity reduces urinary 6-sulfatoxymelatonin in patients with COPD. Respir Res 2023; 24:91. [PMID: 36959654 PMCID: PMC10037776 DOI: 10.1186/s12931-023-02390-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2023] [Accepted: 03/08/2023] [Indexed: 03/25/2023] Open
Abstract
BACKGROUND Little is known about the link between solar activity and variations in melatonin. In this study, we investigated if melatonin's major urinary metabolite, urinary 6-sulfatoxymelatonin (aMT6s), is lowest under periods of intense solar activity. METHODS We investigated associations between high-energy solar particle events [Coronal Mass Ejection (CME) mass, speed and energy] on creatinine-adjusted aMT6s (aMT6sr) concentrations in 140 patients with chronic obstructive pulmonary disease (COPD) using up to four seasonal urine samples (n = 440). Mixed effect models with a random intercept for each subject were used to estimate associations, including effect modification attributable to diabetes, obesity, and reduced pulmonary function. RESULTS Higher values of CME were associated with reduced aMT6sr concentrations, with stronger associations in patients with diabetes. An interquartile range (IQR) increase in natural log CMEspeed averaged through two days before urine collection was associated with a reduction of 9.3% aMT6sr (95%CI: - 17.1%, - 0.8%) in aMT6sr. There was a greater reduction in aMT6sr in patients with diabetes (- 24.5%; 95%CI: - 35.9%, - 11.6%). In patients without diabetes there was no meaningful association (- 2.2%; 95%CI: - 12%, 8.4%). There were similar associations with CMEenergy and CMEmass. There was no effect modification attributable to reduced pulmonary function or obesity. CONCLUSIONS This is the first study in patients with COPD to demonstrate strong detrimental impact of high-energy solar particle events on aMT6sr, with greater associations in patients with diabetes. Since melatonin is an anti-oxidant, it is possible that adverse effects of intense solar activity may be attributable to a reduction in circulating melatonin and that patients with both COPD and diabetes may be more susceptible.
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Affiliation(s)
- Carolina L. Zilli Vieira
- Department of Environmental Health, Harvard T.H. Chan School of Public Health, 401 Park Drive, Landmark Center Room 420, Boston, MA 02115 USA
| | - Petros Koutrakis
- Department of Environmental Health, Harvard T.H. Chan School of Public Health, 401 Park Drive, Landmark Center Room 420, Boston, MA 02115 USA
| | - Man Liu
- Department of Environmental Health, Harvard T.H. Chan School of Public Health, 401 Park Drive, Landmark Center Room 420, Boston, MA 02115 USA
| | - Daniel J. Gottlieb
- Pulmonary, Allergy, Sleep and Critical Care Medicine Section, Veterans Affairs Boston Healthcare System, Boston, MA USA
- Harvard Medical School, Boston, MA USA
| | - Eric Garshick
- Pulmonary, Allergy, Sleep and Critical Care Medicine Section, Veterans Affairs Boston Healthcare System, Boston, MA USA
- Harvard Medical School, Boston, MA USA
- Channing Division of Network Medicine, Brigham and Women’s Hospital, Boston, MA USA
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Liu Y, Wang D, Li T, Xu L, Li Z, Bai X, Tang M, Wang Y. Melatonin: A potential adjuvant therapy for septic myopathy. Biomed Pharmacother 2023; 158:114209. [PMID: 36916434 DOI: 10.1016/j.biopha.2022.114209] [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: 11/28/2022] [Revised: 12/24/2022] [Accepted: 12/30/2022] [Indexed: 01/06/2023] Open
Abstract
Septic myopathy, also known as ICU acquired weakness (ICU-AW), is a characteristic clinical symptom of patients with sepsis, mainly manifested as skeletal muscle weakness and muscular atrophy, which affects the respiratory and motor systems of patients, reduces the quality of life, and even threatens the survival of patients. Melatonin is one of the hormones secreted by the pineal gland. Previous studies have found that melatonin has anti-inflammatory, free radical scavenging, antioxidant stress, autophagic lysosome regulation, mitochondrial protection, and other multiple biological functions and plays a protective role in sepsis-related multiple organ dysfunction. Given the results of previous studies, we believe that melatonin may play an excellent regulatory role in the repair and regeneration of skeletal muscle atrophy in septic myopathy. Melatonin, as an over-the-counter drug, has the potential to be an early, complementary treatment for clinical trials. Based on previous research results, this article aims to critically discuss and review the effects of melatonin on sepsis and skeletal muscle depletion.
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Affiliation(s)
- Yukun Liu
- Department of Plastic and Cosmetic Surgery, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, PR China
| | - Dongfang Wang
- Trauma Center/Department of Emergency and Traumatic Surgery, Tongji Hospital of Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, PR China
| | - Tianyu Li
- Trauma Center/Department of Emergency and Traumatic Surgery, Tongji Hospital of Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, PR China
| | - Ligang Xu
- Trauma Center/Department of Emergency and Traumatic Surgery, Tongji Hospital of Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, PR China
| | - Zhanfei Li
- Trauma Center/Department of Emergency and Traumatic Surgery, Tongji Hospital of Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, PR China
| | - Xiangjun Bai
- Trauma Center/Department of Emergency and Traumatic Surgery, Tongji Hospital of Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, PR China
| | - Manli Tang
- Trauma Center/Department of Emergency and Traumatic Surgery, Tongji Hospital of Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, PR China.
| | - Yuchang Wang
- Trauma Center/Department of Emergency and Traumatic Surgery, Tongji Hospital of Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, PR China.
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Jiao L, Wang Y, Zhang S, Wang Y, Liu Z, Liu Z, Zhou Y, Zhou H, Xu X, Li Z, Liu Z, Yu Z, Nie L, Zhou L, Jiang H. Melatonin improves cardiac remodeling and brain-heart sympathetic hyperactivation aggravated by light disruption after myocardial infarction. J Pineal Res 2022; 73:e12829. [PMID: 36031757 DOI: 10.1111/jpi.12829] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/27/2022] [Revised: 08/11/2022] [Accepted: 08/24/2022] [Indexed: 11/27/2022]
Abstract
Light in the external environment might affect cardiovascular function. The light disruption seems to be related to changes in cardiovascular physiological functions, and disturbing light may be a risk factor for cardiovascular diseases. Prior studies have found that light disruption after myocardial infarction (MI) exacerbates cardiac remodeling, and the brain-heart sympathetic nervous system may be one of the key mechanisms. However, how to improve light-disrupted cardiac remodeling remains unclear. Melatonin is an indoleamine secreted by the pineal gland and controlled by endogenous circadian oscillators within the suprachiasmatic nucleus, which is closely associated with light/dark cycle. This study aimed to explore whether melatonin could improve light-disrupted cardiac remodeling and modulate the brain-heart sympathetic nervous system. Our study revealed that light disruption reduced serum melatonin levels, aggravated cardiac sympathetic remodeling, caused overactivation of the brain-heart sympathetic nervous system, exacerbated cardiac dysfunction, and increased cardiac fibrosis after MI, while melatonin treatment improved light disruption-exacerbated cardiac remodeling and brain-heart sympathetic hyperactivation after MI. Furthermore, RNA-Seq results revealed the significant changes at the cardiac transcription level. In conclusion, melatonin may be a potential therapy for light-disrupted cardiac remodeling.
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Affiliation(s)
- Liying Jiao
- Department of Cardiology, Renmin Hospital of Wuhan University, Wuhan, China
- Cardiac Autonomic Nervous System Research Center of Wuhan University, Wuhan, China
- Cardiovascular Research Institute, Wuhan University, Wuhan, China
- Hubei Key Laboratory of Cardiology, Wuhan, 430060, China
| | - Yuhong Wang
- Department of Cardiology, Renmin Hospital of Wuhan University, Wuhan, China
- Cardiac Autonomic Nervous System Research Center of Wuhan University, Wuhan, China
- Cardiovascular Research Institute, Wuhan University, Wuhan, China
- Hubei Key Laboratory of Cardiology, Wuhan, 430060, China
| | - Song Zhang
- Department of Cardiology, Renmin Hospital of Wuhan University, Wuhan, China
- Cardiac Autonomic Nervous System Research Center of Wuhan University, Wuhan, China
- Cardiovascular Research Institute, Wuhan University, Wuhan, China
- Hubei Key Laboratory of Cardiology, Wuhan, 430060, China
| | - Yueyi Wang
- Department of Cardiology, Renmin Hospital of Wuhan University, Wuhan, China
- Cardiac Autonomic Nervous System Research Center of Wuhan University, Wuhan, China
- Cardiovascular Research Institute, Wuhan University, Wuhan, China
- Hubei Key Laboratory of Cardiology, Wuhan, 430060, China
| | - Zhihao Liu
- Department of Cardiology, Renmin Hospital of Wuhan University, Wuhan, China
- Cardiac Autonomic Nervous System Research Center of Wuhan University, Wuhan, China
- Cardiovascular Research Institute, Wuhan University, Wuhan, China
- Hubei Key Laboratory of Cardiology, Wuhan, 430060, China
| | - Zihan Liu
- Department of Cardiology, Renmin Hospital of Wuhan University, Wuhan, China
- Cardiac Autonomic Nervous System Research Center of Wuhan University, Wuhan, China
- Cardiovascular Research Institute, Wuhan University, Wuhan, China
- Hubei Key Laboratory of Cardiology, Wuhan, 430060, China
| | - Yuyang Zhou
- Department of Cardiology, Renmin Hospital of Wuhan University, Wuhan, China
- Cardiac Autonomic Nervous System Research Center of Wuhan University, Wuhan, China
- Cardiovascular Research Institute, Wuhan University, Wuhan, China
- Hubei Key Laboratory of Cardiology, Wuhan, 430060, China
| | - Huixin Zhou
- Department of Cardiology, Renmin Hospital of Wuhan University, Wuhan, China
- Cardiac Autonomic Nervous System Research Center of Wuhan University, Wuhan, China
- Cardiovascular Research Institute, Wuhan University, Wuhan, China
- Hubei Key Laboratory of Cardiology, Wuhan, 430060, China
| | - Xiao Xu
- Department of Cardiology, Renmin Hospital of Wuhan University, Wuhan, China
- Cardiac Autonomic Nervous System Research Center of Wuhan University, Wuhan, China
- Cardiovascular Research Institute, Wuhan University, Wuhan, China
- Hubei Key Laboratory of Cardiology, Wuhan, 430060, China
| | - Zeyan Li
- Department of Cardiology, Renmin Hospital of Wuhan University, Wuhan, China
- Cardiac Autonomic Nervous System Research Center of Wuhan University, Wuhan, China
- Cardiovascular Research Institute, Wuhan University, Wuhan, China
- Hubei Key Laboratory of Cardiology, Wuhan, 430060, China
| | - Zhihao Liu
- Department of Cardiology, Renmin Hospital of Wuhan University, Wuhan, China
- Cardiac Autonomic Nervous System Research Center of Wuhan University, Wuhan, China
- Cardiovascular Research Institute, Wuhan University, Wuhan, China
- Hubei Key Laboratory of Cardiology, Wuhan, 430060, China
| | - Zhongyang Yu
- Department of Cardiology, Renmin Hospital of Wuhan University, Wuhan, China
- Cardiac Autonomic Nervous System Research Center of Wuhan University, Wuhan, China
- Cardiovascular Research Institute, Wuhan University, Wuhan, China
- Hubei Key Laboratory of Cardiology, Wuhan, 430060, China
| | - Liqing Nie
- Department of Cardiology, Renmin Hospital of Wuhan University, Wuhan, China
- Cardiac Autonomic Nervous System Research Center of Wuhan University, Wuhan, China
- Cardiovascular Research Institute, Wuhan University, Wuhan, China
- Hubei Key Laboratory of Cardiology, Wuhan, 430060, China
| | - Liping Zhou
- Department of Cardiology, Renmin Hospital of Wuhan University, Wuhan, China
- Cardiac Autonomic Nervous System Research Center of Wuhan University, Wuhan, China
- Cardiovascular Research Institute, Wuhan University, Wuhan, China
- Hubei Key Laboratory of Cardiology, Wuhan, 430060, China
| | - Hong Jiang
- Department of Cardiology, Renmin Hospital of Wuhan University, Wuhan, China
- Cardiac Autonomic Nervous System Research Center of Wuhan University, Wuhan, China
- Cardiovascular Research Institute, Wuhan University, Wuhan, China
- Hubei Key Laboratory of Cardiology, Wuhan, 430060, China
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11
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ÖZ GERGİN Ö, CENGİZ MAT Ö, BOLAT D, KABADAYI M, PEHLİVAN SS, COŞKUN G. Vankomisin kaynaklı nefrotoksisiteyi önlemede melatoninin etkinliği: deneysel bir çalışma. CUKUROVA MEDICAL JOURNAL 2022. [DOI: 10.17826/cumj.1103876] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
Abstract
Purpose: The aim of the study explores probable toxic effects of vancomycin on kidney and analysis of the probable protective effects of melatonin.
Materials and Methods: In this study, rats were randomly divided into 4 groups: the control group; the melatonin (10 mg/kg/day) group; the vancomycin-treated (200 mg/kg) group; and the vancomycin (200 mg/kg) + melatonin (10 mg/kg/day) group. Rats in the treatment group were given two doses of vancomycin a day with an interval of seven consecutive days and melatonin (10 mg/kg/day) once daily for seven consecutive days. The experiment was continued for 15 days. In each group, seven rats were grouped together. 15 days after the experiment, the rats were sacrificed under anesthesia and among all groups. Kidney tissues were collected and processed for further TNF- expression analysis, as well as histological analyses such as hematoxylin and eosin (H&E), Masson's tricrom, and Periodic acid schiff (PAS) staining to assess pathological severity. In addition, a terminal deoxynucleotidyl transferase dUTP nick end labeling (TUNEL) assay was performed to evaluate apoptosis.
Results: While vancomycin upregulated TNF-α expression, melatonin reduced levels of TNF-α immunoreactivity intensity and clearly improved pathological severity in rat kidneys. Further, melatonin significantly inhibited vancomycin-induced TUNEL-positive cell numbers.
Conclusion: Melatonin has protective activity against vancomycin-induced pro-inflammatory and proapoptotic effects in kidneys during organ preservation time and improves kidney function.
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12
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Lecour S, Du Pré BC, Bøtker HE, Brundel BJJM, Daiber A, Davidson SM, Ferdinandy P, Girao H, Gollmann-Tepeköylü C, Gyöngyösi M, Hausenloy DJ, Madonna R, Marber M, Perrino C, Pesce M, Schulz R, Sluijter JPG, Steffens S, Van Linthout S, Young ME, Van Laake LW. Circadian rhythms in ischaemic heart disease: key aspects for preclinical and translational research: position paper of the ESC working group on cellular biology of the heart. Cardiovasc Res 2022; 118:2566-2581. [PMID: 34505881 DOI: 10.1093/cvr/cvab293] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/29/2021] [Revised: 06/04/2021] [Accepted: 09/07/2021] [Indexed: 12/11/2022] Open
Abstract
Circadian rhythms are internal regulatory processes controlled by molecular clocks present in essentially every mammalian organ that temporally regulate major physiological functions. In the cardiovascular system, the circadian clock governs heart rate, blood pressure, cardiac metabolism, contractility, and coagulation. Recent experimental and clinical studies highlight the possible importance of circadian rhythms in the pathophysiology, outcome, or treatment success of cardiovascular disease, including ischaemic heart disease. Disturbances in circadian rhythms are associated with increased cardiovascular risk and worsen outcome. Therefore, it is important to consider circadian rhythms as a key research parameter to better understand cardiac physiology/pathology, and to improve the chances of translation and efficacy of cardiac therapies, including those for ischaemic heart disease. The aim of this Position Paper by the European Society of Cardiology Working Group Cellular Biology of the Heart is to highlight key aspects of circadian rhythms to consider for improvement of preclinical and translational studies related to ischaemic heart disease and cardioprotection. Applying these considerations to future studies may increase the potential for better translation of new treatments into successful clinical outcomes.
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Affiliation(s)
- Sandrine Lecour
- Department of Medicine, Hatter Institute for Cardiovascular Research in Africa, University of Cape Town, Cape Town, South Africa
| | - Bastiaan C Du Pré
- Department of Internal Medicine, Erasmus Medical Centre, Rotterdam, The Netherlands
| | - Hans Erik Bøtker
- Department of Cardiology, Aarhus University Hospital, Aarhus, Denmark
| | - Bianca J J M Brundel
- Department of Physiology, Amsterdam UMC, Vrije Universiteit, Amsterdam Cardiovascular Sciences, Amsterdam, The Netherlands
| | - Andreas Daiber
- Department of Cardiology, Molecular Cardiology, Medical Center of the Johannes Gutenberg University, Mainz, Germany
- German Center for Cardiovascular Research (DZHK), Partner Site Rhine-Main, Mainz, Germany
| | - Sean M Davidson
- The Hatter Cardiovascular Institute, University College London, London, UK
| | - Peter Ferdinandy
- Department of Pharmacology and Pharmacotherapy, Semmelweis University, Budapest, Hungary
- Pharmahungary Group, Szeged, Hungary
| | - Henrique Girao
- Faculty of Medicine, Univ Coimbra, Coimbra Institute for Clinical and Biomedical Research (iCBR), Center for Innovative Biomedicine and Biotechnology (CIBB), Clinical Academic Centre of Coimbra (CACC), Coimbra, Portugal
| | | | - Mariann Gyöngyösi
- Department of Cardiology, Medical University of Vienna, Waehringer Guertel 18-20, A-1090, Vienna, Austria
| | - Derek J Hausenloy
- Cardiovascular & Metabolic Disorders Program, Duke-National University of Singapore Medical School, Singapore, Singapore
- National Heart Research Institute Singapore, National Heart Centre, Singapore, Singapore
- Yong Loo Lin School of Medicine, National University Singapore, Singapore
- The Hatter Cardiovascular Institute, University College London, London, UK
- Cardiovascular Research Center, College of Medical and Health Sciences, Asia University, Taichung City, Taiwan
| | - Rosalinda Madonna
- Institute of Cardiology, University of Pisa, Pisa, Italy
- Department of Internal Medicine, University of Texas Medical School in Houston, Houston, TX, USA
| | - Michael Marber
- King's College London BHF Centre, The Rayne Institute, St Thomas' Hospital, London, UK
| | - Cinzia Perrino
- Department of Advanced Biomedical Sciences, Federico II University, Naples, Italy
| | - Maurizio Pesce
- Unità di Ingegneria Tissutale Cardiovascolare, Centro Cardiologico Monzino, IRCCS, Milan, Italy
| | - Rainer Schulz
- Institute of Physiology, Justus-Liebig University Giessen, Giessen, Germany
| | - Joost P G Sluijter
- Department of Cardiology, Experimental Cardiology Laboratory, Regenerative Medicine Center, Circulatory Health Laboratory, University Medical Center Utrecht, Utrecht University, Utrecht, The Netherlands
| | - Sabine Steffens
- Institute for Cardiovascular Prevention, Ludwig-Maximilians-University, Munich, Germany
- German Centre for Cardiovascular Research (DZHK), Partner Site Munich Heart Alliance, Munich, Germany
| | - Sophie Van Linthout
- Berlin Institute of Health Center for Regenerative Therapies & Berlin-Brandenburg Center for Regenerative Therapies (BCRT), Charité, University Medicine Berlin, Berlin 10178, Germany
- German Centre for Cardiovascular Research (DZHK), Partner Site Berlin, Berlin, Germany
| | - Martin E Young
- Division of Cardiovascular Diseases, Department of Medicine, University of Alabama at Birmingham, Birmingham, AL, USA
| | - Linda W Van Laake
- Cardiology and UMC Utrecht Regenerative Medicine Center, University Medical Center Utrecht, Utrecht, The Netherlands
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13
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Tobeiha M, Jafari A, Fadaei S, Mirazimi SMA, Dashti F, Amiri A, Khan H, Asemi Z, Reiter RJ, Hamblin MR, Mirzaei H. Evidence for the Benefits of Melatonin in Cardiovascular Disease. Front Cardiovasc Med 2022; 9:888319. [PMID: 35795371 PMCID: PMC9251346 DOI: 10.3389/fcvm.2022.888319] [Citation(s) in RCA: 27] [Impact Index Per Article: 13.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2022] [Accepted: 05/10/2022] [Indexed: 12/13/2022] Open
Abstract
The pineal gland is a neuroendocrine gland which produces melatonin, a neuroendocrine hormone with critical physiological roles in the circadian rhythm and sleep-wake cycle. Melatonin has been shown to possess anti-oxidant activity and neuroprotective properties. Numerous studies have shown that melatonin has significant functions in cardiovascular disease, and may have anti-aging properties. The ability of melatonin to decrease primary hypertension needs to be more extensively evaluated. Melatonin has shown significant benefits in reducing cardiac pathology, and preventing the death of cardiac muscle in response to ischemia-reperfusion in rodent species. Moreover, melatonin may also prevent the hypertrophy of the heart muscle under some circumstances, which in turn would lessen the development of heart failure. Several currently used conventional drugs show cardiotoxicity as an adverse effect. Recent rodent studies have shown that melatonin acts as an anti-oxidant and is effective in suppressing heart damage mediated by pharmacologic drugs. Therefore, melatonin has been shown to have cardioprotective activity in multiple animal and human studies. Herein, we summarize the most established benefits of melatonin in the cardiovascular system with a focus on the molecular mechanisms of action.
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Affiliation(s)
- Mohammad Tobeiha
- School of Medicine, Kashan University of Medical Sciences, Kashan, Iran
- Student Research Committee, Kashan University of Medical Sciences, Kashan, Iran
| | - Ameneh Jafari
- Advanced Therapy Medicinal Product (ATMP) Department, Breast Cancer Research Center, Motamed Cancer Institute, ACECR, Tehran, Iran
- Proteomics Research Center, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Sara Fadaei
- Department of Internal Medicine and Endocrinology, Beheshti University of Medical Sciences, Tehran, Iran
| | - Seyed Mohammad Ali Mirazimi
- School of Medicine, Kashan University of Medical Sciences, Kashan, Iran
- Student Research Committee, Kashan University of Medical Sciences, Kashan, Iran
| | - Fatemeh Dashti
- School of Medicine, Kashan University of Medical Sciences, Kashan, Iran
- Student Research Committee, Kashan University of Medical Sciences, Kashan, Iran
| | - Atefeh Amiri
- Department of Medical Biotechnology, School of Medicine, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Haroon Khan
- Department of Pharmacy, Abdul Wali Khan University, Mardan, Pakistan
| | - Zatollah Asemi
- Research Center for Biochemistry and Nutrition in Metabolic Diseases, Institute for Basic Sciences, Kashan University of Medical Sciences, Kashan, Iran
| | - Russel J. Reiter
- Department of Cell Systems and Anatomy, UT Health. Long School of Medicine, San Antonio, TX, United States
| | - Michael R. Hamblin
- Laser Research Centre, Faculty of Health Science, University of Johannesburg, Johannesburg, South Africa
| | - Hamed Mirzaei
- Research Center for Biochemistry and Nutrition in Metabolic Diseases, Institute for Basic Sciences, Kashan University of Medical Sciences, Kashan, Iran
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14
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Wei Y, Zhang C, Wang D, Wang C, Sun L, Chen P. Progress in Research on the Effect of Melatonin on Postoperative Cognitive Dysfunction in Older Patients. Front Aging Neurosci 2022; 14:782358. [PMID: 35356294 PMCID: PMC8959891 DOI: 10.3389/fnagi.2022.782358] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2021] [Accepted: 01/24/2022] [Indexed: 12/20/2022] Open
Abstract
Postoperative cognitive dysfunction (POCD) is a common complication of the central nervous system in elderly patients after operation. It will prolong the length of stay, reduce the independence and quality of daily life, and increase the risk of death. However, at present, there is a lack of safe and effective ideal drugs for the prevention and treatment of POCD. Melatonin is one of the hormones secreted by the pineal gland of the brain, which has the functions of regulating circadian rhythm, anti-inflammation, anti-oxidation, anti-apoptosis, and so on. Some recent studies have shown that MT can prevent and treat POCD by adjusting circadian rhythm, restoring cholinergic system function, neuroprotection, and so on. This article will introduce POCD, melatonin and the mechanism of melatonin on POCD, respectively, to provide a basis for clinical prevention and treatment of POCD in the elderly.
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15
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Kvetnoy I, Ivanov D, Mironova E, Evsyukova I, Nasyrov R, Kvetnaia T, Polyakova V. Melatonin as the Cornerstone of Neuroimmunoendocrinology. Int J Mol Sci 2022; 23:ijms23031835. [PMID: 35163757 PMCID: PMC8836571 DOI: 10.3390/ijms23031835] [Citation(s) in RCA: 18] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2021] [Revised: 02/03/2022] [Accepted: 02/04/2022] [Indexed: 11/23/2022] Open
Abstract
Much attention has been recently drawn to studying melatonin – a hormone whose synthesis was first found in the epiphysis (pineal gland). This interest can be due to discovering the role of melatonin in numerous physiological processes. It was the discovery of melatonin synthesis in endocrine organs (pineal gland), neural structures (Purkinje cells in the cerebellum, retinal photoreceptors), and immunocompetent cells (T lymphocytes, NK cells, mast cells) that triggered the evolution of new approaches to the unifield signal regulation of homeostasis, which, at the turn of the 21st century, lead to the creation of a new integral biomedical discipline — neuroimmunoendocrinology. While numerous hormones have been verified over the last decade outside the “classical” locations of their formation, melatonin occupies an exclusive position with regard to the diversity of locations where it is synthesized and secreted. This review provides an overview and discussion of the major data regarding the role of melatonin in various physiological and pathological processes, which affords grounds for considering melatonin as the “cornerstone” on which neuroimmunoendocrinology has been built as an integral concept of homeostasis regulation.
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Affiliation(s)
- Igor Kvetnoy
- Center of Molecular Biomedicine, Saint-Petersburg Research Institute of Phthisiopulmonology, 191036 Saint-Petersburg, Russia;
- Department of Physiology and Department of Pathology, Saint-Petersburg State University, 199034 Saint-Petersburg, Russia
| | - Dmitry Ivanov
- Department of Pathology, Saint-Petersburg State Pediatric Medical University, 194100 Saint-Petersburg, Russia; (D.I.); (R.N.); (V.P.)
| | - Ekaterina Mironova
- Center of Molecular Biomedicine, Saint-Petersburg Research Institute of Phthisiopulmonology, 191036 Saint-Petersburg, Russia;
- Department of Biogerontology, Saint Petersburg Institute of Bioregulation and Gerontology, 197110 Saint-Petersburg, Russia;
- Correspondence:
| | - Inna Evsyukova
- Department of Perinatal Pathology, Ott Research Institute of Obstetrics, Gynecology and Reproductology, 199034 Saint-Petersburg, Russia;
| | - Ruslan Nasyrov
- Department of Pathology, Saint-Petersburg State Pediatric Medical University, 194100 Saint-Petersburg, Russia; (D.I.); (R.N.); (V.P.)
| | - Tatiana Kvetnaia
- Department of Biogerontology, Saint Petersburg Institute of Bioregulation and Gerontology, 197110 Saint-Petersburg, Russia;
| | - Victoria Polyakova
- Department of Pathology, Saint-Petersburg State Pediatric Medical University, 194100 Saint-Petersburg, Russia; (D.I.); (R.N.); (V.P.)
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16
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Pongkan W, Piamsiri C, Dechvongya S, Punyapornwitthaya V, Boonyapakorn C. Short-term melatonin supplementation decreases oxidative stress but does not affect left ventricular structure and function in myxomatous mitral valve degenerative dogs. BMC Vet Res 2022; 18:24. [PMID: 34996468 PMCID: PMC8740462 DOI: 10.1186/s12917-021-03125-z] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2021] [Accepted: 12/20/2021] [Indexed: 11/27/2022] Open
Abstract
Background Cardiac wall stress and high oxidative stress are often found in cases of myxomatous mitral valve degenerative (MMVD) disease and can lead to myocardial injuries and cardiac dysfunction. Melatonin, an antioxidant, has been shown to exert cardioprotection in laboratory animal models. However, its effect on metabolic parameters and left ventricular (LV) adaptation in MMVD dogs has rarely been investigated. This clinical trial hypothesized that a melatonin supplement for 4 weeks would improve metabolic parameters, LV structure (diameters and wall thickness), and LV function in MMVD dogs. Blood profiles, echocardiograms, and oxidative stress levels were obtained from 18 dogs with MMVD stage B2 and C at baseline and after prescribed Melatonin (2 mg/kg) for 4 weeks. Eleven dogs with MMVD stage B2 and C, which received a placebo, were evaluated as a control group. Results In this clinical trial, the baseline plasma malondialdehyde (MDA) was no different between the treatment and placebo groups. The post-treatment plasma MDA levels (4.50 ± 0.63 mg/mL) in the treatment group was significantly decreased after 4 weeks of melatonin supplementation compared to pre-treatment levels (7.51 ± 1.11 mg/mL) (P = 0.038). However, blood profiles and LV structure and function investigated using echocardiography were found not to different between pre-and post-treatment in each group. No adverse effects were observed following melatonin supplementation. Conclusions This clinical trial demonstrated that a melatonin supplement for 4 weeks can attenuate oxidative stress levels in MMVD dogs, especially in MMVD stage C, but does not result in LV structural changes or LV function in MMVD dogs of either stage B2 or stage C.
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Affiliation(s)
- Wanpitak Pongkan
- Department of Veterinary Biosciences and Veterinary Public Health, Faculty of Veterinary Medicine, Chiang Mai University, Chiang Mai, 50100, Thailand.,Integrative Research Center for Veterinary Circulatory Sciences, Faculty of Veterinary Medicine, Chiang Mai University, Chiang Mai, 50100, Thailand.,Veterinary Cardiopulmonary Clinic, Small Animal Hospital, Faculty of Veterinary Medicine, Chiang Mai University, Chiang Mai, 50100, Thailand
| | - Chanon Piamsiri
- Department of Companion Animal and Wildlife Clinic, Faculty of Veterinary Medicine, Chiang Mai University, Chiang Mai, 50100, Thailand
| | - Sirada Dechvongya
- Department of Companion Animal and Wildlife Clinic, Faculty of Veterinary Medicine, Chiang Mai University, Chiang Mai, 50100, Thailand
| | - Verasak Punyapornwitthaya
- Department of Food Animal Clinic, Faculty of Veterinary Medicine, Chiang Mai University, Chiang Mai, 50100, Thailand
| | - Chavalit Boonyapakorn
- Integrative Research Center for Veterinary Circulatory Sciences, Faculty of Veterinary Medicine, Chiang Mai University, Chiang Mai, 50100, Thailand. .,Veterinary Cardiopulmonary Clinic, Small Animal Hospital, Faculty of Veterinary Medicine, Chiang Mai University, Chiang Mai, 50100, Thailand. .,Department of Companion Animal and Wildlife Clinic, Faculty of Veterinary Medicine, Chiang Mai University, Chiang Mai, 50100, Thailand.
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17
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Lim S, Park S, Koyanagi A, Yang JW, Jacob L, Yon DK, Lee SW, Kim MS, Il Shin J, Smith L. Effects of exogenous melatonin supplementation on health outcomes: An umbrella review of meta-analyses based on randomized controlled trials. Pharmacol Res 2022; 176:106052. [PMID: 34999224 DOI: 10.1016/j.phrs.2021.106052] [Citation(s) in RCA: 14] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/24/2021] [Revised: 12/23/2021] [Accepted: 12/29/2021] [Indexed: 12/15/2022]
Abstract
Various melatonin supplementations have been developed to improve health outcomes in various clinical conditions. Thus, we sought to evaluate and summarize the effect of melatonin treatments in clinical settings for health outcomes. We searched PubMed/Medline, Embase, and Cochrane Library from inception to 4 February 2021. We included meta-analyses of randomized controlled trials investigating the melatonin intervention for any health outcome. Based on the different effect sizes of each meta-analysis, we calculated random models' standardized mean differences or risk ratios. We observed robust evidence supported by statistical significance with non-considerable heterogeneity between studies for sleep-related problems, cancer, surgical patients, and pregnant women. Patients with sleep disorder, sleep onset latency (SMD 0.33, 95% CI: 0.10 - 0.56, P < 0.01) were significantly improved whereas no clear evidence was shown with sleep efficiency (1.10, 95% CI: -0.26 to 2.45). The first analgesic requirement time (SMD 5.81, 95% CI: 2.57-9.05, P < 0.001) of surgical patients was distinctly improved. Female patients under artificial reproductive technologies had significant increase in the top-quality embryos (SMD 0.53, 95% CI: 0.27 - 0.79, P < 0.001), but no statistically clear evidence was found in the live birth rate (SMD 1.20, 95% CI: 0.83 - 1.72). Survival at one year (RR 1.90, 95% CI: 1.28 - 2.83, P < 0.005) significantly increased with cancer patients. Research on melatonin interventions to treat clinical symptoms and sleep problems among diverse health conditions was identified and provided considerable evidence. Future well-designed randomized clinical trials of high quality and subgroup quantitative analyses are essential.
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Affiliation(s)
- Soojin Lim
- Yonsei University College of Medicine, Seoul, Republic of Korea
| | - Seoyeon Park
- Yonsei University College of Medicine, Seoul, Republic of Korea
| | - Ai Koyanagi
- ICREA, Pg. Lluis Companys 23, Barcelona, Spain; Research and Development Unit, Parc Sanitari Sant Joan de Déu, CIBERSAM, Dr. Antoni Pujadas, 42, Sant Boi de Llobregat, Barcelona 08830, Spain
| | - Jae Won Yang
- Department of Nephrology, Yonsei University Wonju College of Medicine, Wonju, Republic of Korea
| | - Louis Jacob
- Research and Development Unit, Parc Sanitari Sant Joan de Déu, CIBERSAM, Dr. Antoni Pujadas, 42, Sant Boi de Llobregat, Barcelona 08830, Spain; Faculty of Medicine, University of Versailles Saint-Quentin-en-Yvelines, Montigny-le-Bretonneux, France
| | - Dong Keon Yon
- Department of Pediatrics, Seoul National University Hospital, Seoul National University College of Medicine, Seoul, Republic of Korea; Department of Pediatrics, Kyung Hee University Medical Center, Kyung Hee University College of Medicine, Seoul, Republic of Korea
| | - Seung Won Lee
- Department of Data Science, Sejong University College of Software Convergence, Seoul, Republic of Korea; Sungkyunkwan University School of Medicine, Suwon, Republic of Korea
| | - Min Seo Kim
- Samsung Advanced Institute for Health Sciences & Technology (SAIHST), Sungkyunkwan University, Samsung Medical Center, Seoul, Republic of Korea
| | - Jae Il Shin
- Department of Pediatrics, Yonsei University College of Medicine, Seoul, Republic of Korea.
| | - Lee Smith
- Cambridge Centre for Health, Performance, and Wellbeing, Anglia Ruskin University, Cambridge, UK
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18
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Nagasawa Y, Nanami M, Kuragano T, Ishihara M. Melatonin and gestational hypertension. Hypertens Res 2021; 44:1540-1542. [PMID: 34385689 DOI: 10.1038/s41440-021-00722-1] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2021] [Revised: 07/14/2021] [Accepted: 07/14/2021] [Indexed: 11/09/2022]
Affiliation(s)
- Yasuyuki Nagasawa
- Division of Kidney, Dialysis and Cardiology, Department of Internal Medicine, Hyogo College of Medicine, Nishinomiya, Hyogo, Japan.
| | - Masayoshi Nanami
- Division of Kidney, Dialysis and Cardiology, Department of Internal Medicine, Hyogo College of Medicine, Nishinomiya, Hyogo, Japan
| | - Takahiro Kuragano
- Division of Kidney, Dialysis and Cardiology, Department of Internal Medicine, Hyogo College of Medicine, Nishinomiya, Hyogo, Japan
| | - Masaharu Ishihara
- Division of Kidney, Dialysis and Cardiology, Department of Internal Medicine, Hyogo College of Medicine, Nishinomiya, Hyogo, Japan
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19
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Zhou X, Gao Y, Hu Y, Ma X. Melatonin protects cochlear hair cells from nicotine-induced injury through inhibiting apoptosis, inflammation, oxidative stress and endoplasmic reticulum stress. Basic Clin Pharmacol Toxicol 2021; 129:308-318. [PMID: 34254721 DOI: 10.1111/bcpt.13638] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2021] [Revised: 07/07/2021] [Accepted: 07/09/2021] [Indexed: 12/23/2022]
Abstract
Hearing loss positively links with cigarette smoking. However, the involved mechanism and treatment strategies are largely unrevealed. This study aimed to investigate the damaging effect of nicotine on cochlear hair cells, reveal the underlying mechanism and evaluate the therapeutic effect of melatonin on nicotine-induced injury. The results showed that nicotine induced cytotoxicity of House Ear Institute-Organ of Corti 1 (HEI-OC1) cochlear hair cells in a dose-dependent manner (0, 2.5, 5, 10, 20, 40 and 80 μM). Functional investigations showed that nicotine (10 μM) stimulation dramatically promoted apoptosis, inflammatory response, oxidative stress and endoplasmic reticulum stress in HEI-OC1 cells. Moreover, melatonin treatment dose-dependently alleviated the nicotine-induced cytotoxicity in HEI-OC1 cells (0, 10 25, 50 and 100 μM). Further investigation showed that melatonin (100 μM) effectively attenuated the nicotine-induced apoptosis, inflammation, oxidative stress and endoplasmic reticulum stress in HEI-OC1 cells. Collectively, we demonstrated that nicotine induced apoptosis, inflammation, oxidative stress and endoplasmic reticulum stress of cochlear hair cells in an in vitro cell model. Melatonin showed protective effect on these aspects, suggesting that melatonin may be a potential agent for treating smoking-induced hearing loss.
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Affiliation(s)
- Xinjia Zhou
- Department of Otolaryngology Head and Neck Surgery, Shengjing Hospital of China Medical University, Shenyang, China
| | - Yuan Gao
- Department of Pulmonary and Critical Care Medicine, Shengjing Hospital of China Medical University, Shenyang, China
| | - Yue Hu
- Department of Otolaryngology Head and Neck Surgery, Shengjing Hospital of China Medical University, Shenyang, China
| | - Xiulan Ma
- Department of Otolaryngology Head and Neck Surgery, Shengjing Hospital of China Medical University, Shenyang, China
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20
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Schranner D, Schönfelder M, Römisch‐Margl W, Scherr J, Schlegel J, Zelger O, Riermeier A, Kaps S, Prehn C, Adamski J, Söhnlein Q, Stöcker F, Kreuzpointner F, Halle M, Kastenmüller G, Wackerhage H. Physiological extremes of the human blood metabolome: A metabolomics analysis of highly glycolytic, oxidative, and anabolic athletes. Physiol Rep 2021; 9:e14885. [PMID: 34152092 PMCID: PMC8215680 DOI: 10.14814/phy2.14885] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2021] [Revised: 05/01/2021] [Accepted: 05/04/2021] [Indexed: 12/17/2022] Open
Abstract
Human metabolism is highly variable. At one end of the spectrum, defects of enzymes, transporters, and metabolic regulation result in metabolic diseases such as diabetes mellitus or inborn errors of metabolism. At the other end of the spectrum, favorable genetics and years of training combine to result in physiologically extreme forms of metabolism in athletes. Here, we investigated how the highly glycolytic metabolism of sprinters, highly oxidative metabolism of endurance athletes, and highly anabolic metabolism of natural bodybuilders affect their serum metabolome at rest and after a bout of exercise to exhaustion. We used targeted mass spectrometry-based metabolomics to measure the serum concentrations of 151 metabolites and 43 metabolite ratios or sums in 15 competitive male athletes (6 endurance athletes, 5 sprinters, and 4 natural bodybuilders) and 4 untrained control subjects at fasted rest and 5 minutes after a maximum graded bicycle test to exhaustion. The analysis of all 194 metabolite concentrations, ratios and sums revealed that natural bodybuilders and endurance athletes had overall different metabolite profiles, whereas sprinters and untrained controls were more similar. Specifically, natural bodybuilders had 1.5 to 1.8-fold higher concentrations of specific phosphatidylcholines and lower levels of branched chain amino acids than all other subjects. Endurance athletes had 1.4-fold higher levels of a metabolite ratio showing the activity of carnitine-palmitoyl-transferase I and 1.4-fold lower levels of various alkyl-acyl-phosphatidylcholines. When we compared the effect of exercise between groups, endurance athletes showed 1.3-fold higher increases of hexose and of tetradecenoylcarnitine (C14:1). In summary, physiologically extreme metabolic capacities of endurance athletes and natural bodybuilders are associated with unique blood metabolite concentrations, ratios, and sums at rest and after exercise. Our results suggest that long-term specific training, along with genetics and other athlete-specific factors systematically change metabolite concentrations at rest and after exercise.
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Affiliation(s)
- Daniela Schranner
- Exercise BiologyDepartment of Sport and Health SciencesTechnische Universität MünchenMunichGermany
| | - Martin Schönfelder
- Exercise BiologyDepartment of Sport and Health SciencesTechnische Universität MünchenMunichGermany
| | | | - Johannes Scherr
- University Center for Prevention and Sports MedicineUniversity Hospital BalgristUniversität ZürichZurichSwitzerland
| | - Jürgen Schlegel
- Department of NeuropathologyInstitute of PathologyTechnische Universität MünchenMunichGermany
| | - Otto Zelger
- Department of Prevention and Sports MedicineTechnische Universität MünchenMunichGermany
| | - Annett Riermeier
- Exercise BiologyDepartment of Sport and Health SciencesTechnische Universität MünchenMunichGermany
| | - Stephanie Kaps
- Exercise BiologyDepartment of Sport and Health SciencesTechnische Universität MünchenMunichGermany
| | - Cornelia Prehn
- Research Unit Molecular Endocrinology and MetabolismHelmholtz Zentrum MünchenNeuherbergGermany
| | - Jerzy Adamski
- Research Unit Molecular Endocrinology and MetabolismHelmholtz Zentrum MünchenNeuherbergGermany
- German Center for Diabetes ResearchNeuherbergGermany
- Chair of Experimental GeneticsTechnische Universität MünchenFreising‐WeihenstephanGermany
- Department of BiochemistryYong Loo Lin School of MedicineNational University of SingaporeSingapore
| | - Quirin Söhnlein
- Exercise BiologyDepartment of Sport and Health SciencesTechnische Universität MünchenMunichGermany
| | - Fabian Stöcker
- Teaching and Educational LabDepartment of Sport and Health SciencesTechnische Universität MünchenMunichGermany
| | - Florian Kreuzpointner
- Prevention CenterDepartment of Sport and Health SciencesTechnische Universität MünchenMunichGermany
| | - Martin Halle
- Department of Prevention and Sports MedicineTechnische Universität MünchenMunichGermany
| | - Gabi Kastenmüller
- Institute of Computational BiologyHelmholtz Zentrum MünchenNeuherbergGermany
- German Center for Diabetes ResearchNeuherbergGermany
| | - Henning Wackerhage
- Exercise BiologyDepartment of Sport and Health SciencesTechnische Universität MünchenMunichGermany
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21
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Sutanto CN, Loh WW, Kim JE. The impact of tryptophan supplementation on sleep quality: a systematic review, meta-analysis, and meta-regression. Nutr Rev 2021; 80:306-316. [PMID: 33942088 DOI: 10.1093/nutrit/nuab027] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2020] [Revised: 02/09/2021] [Accepted: 03/13/2021] [Indexed: 11/13/2022] Open
Abstract
CONTEXT L-tryptophan (Trp) has been documented to aid sleep, but a systematic compilation of its effect on sleep quality is still limited. OBJECTIVE We assessed the effect of Trp supplementation on sleep quality via meta-analysis and meta-regression. The effects of daily Trp dose (<1 g and ≥1 g) were also assessed. DATA SOURCES A database search was done in PubMed, Medline (Ovid), Cumulative Index to Nursing and Allied Health Literature (CINAHL), and Cochrane and a total of 18 articles were collected. DATA EXTRACTION Extracted data from 4 articles were also analyzed using random-effect meta-analysis and meta-regression. Standardized mean difference (SMD) was used in meta-analysis. DATA ANALYSIS Results from the study suggested that Trp supplementation can shorten wake after sleep onset (-81.03 min/g, P = 0.017; SMD, -1.08 min [95%CI, -1.89 to -0.28]). In addition, the group receiving ≥1 g Trp supplementation had a shorter wake after sleep onset than the group with Trp < 1g supplementation (Trp <1 g vs Trp ≥1 g: 56.55 vs 28.91 min; P = 0.001). However, Trp supplementation did not affect other sleep components. CONCLUSION Trp supplementation, especially at ≥1 g can help improve sleep quality.
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Affiliation(s)
- Clarinda N Sutanto
- C.N. Sutanto, W.W. Loh, and J.E. Kim are with Department of Food Science and Technology, Faculty of Science, National University of Singapore, Singapore
| | - Wen Wei Loh
- C.N. Sutanto, W.W. Loh, and J.E. Kim are with Department of Food Science and Technology, Faculty of Science, National University of Singapore, Singapore
| | - Jung Eun Kim
- C.N. Sutanto, W.W. Loh, and J.E. Kim are with Department of Food Science and Technology, Faculty of Science, National University of Singapore, Singapore
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22
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Wang Y, Jiang W, Chen H, Zhou H, Liu Z, Liu Z, Liu Z, Zhou Y, Zhou X, Yu L, Jiang H. Sympathetic Nervous System Mediates Cardiac Remodeling After Myocardial Infarction in a Circadian Disruption Model. Front Cardiovasc Med 2021; 8:668387. [PMID: 33842566 PMCID: PMC8032890 DOI: 10.3389/fcvm.2021.668387] [Citation(s) in RCA: 20] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2021] [Accepted: 03/04/2021] [Indexed: 12/20/2022] Open
Abstract
Background: Circadian rhythms have a considerable impact on the daily physiology of the heart, and their disruption causes pathology. Several studies have revealed that circadian disruption impaired cardiac remodeling after myocardial infarction (MI); however, the underlying brain-heart mechanisms remain unknown. We aim to discuss whether circadian disruption facilitates cardiac remodeling after MI by activating sympathetic nervous system. Methods: Rats were randomly divided into three groups: Sham group (Sham), MI group (MI), and MI+ circadian disruption group (MI+Dis); rats were treated with pseudorabies virus (PRV) injections for trans-synaptic retrograde tracing; rats were randomly divided into two groups: MI+ circadian disruption + Empty Vector+ clozapine N-oxide (CNO) (Empty Vector), and MI+ circadian disruption + hM4D(Gi)+ CNO [hM4D(Gi)]. Results: Circadian disruption significantly facilitated cardiac remodeling after MI with lower systolic function, larger left ventricular volume, and aggravated cardiac fibrosis. Cardiac sympathetic remodeling makers and serum norepinephrine levels were also significantly increased by circadian disruption. PRV virus-labeled neurons were identified in the superior cervical ganglion (SCG), paraventricular nucleus (PVN), and suprachiasmatic nucleus (SCN) regions. Ganglionic blockade via designer receptors exclusively activated by designer drugs (DREADD) technique suppressed the activity of sympathetic nervous system and significantly alleviated the disruption-related cardiac dysfunction. Conclusion: Circadian disruption adversely affected cardiac remodeling after MI possibly by activating sympathetic nervous system, and suppressing sympathetic activity can attenuate this disruption-related cardiac dysfunction.
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Affiliation(s)
- Yuhong Wang
- Department of Cardiology, Renmin Hospital of Wuhan University, Wuhan, China.,Cardiac Autonomic Nervous Research Center, Wuhan University, Wuhan, China.,Department of Cardiology Cardiovascular Research Institute, Wuhan University, Wuhan, China.,Hubei Key Laboratory of Cardiology, Wuhan, China
| | - Wanli Jiang
- Department of Thoracic Surgery, Renmin Hospital of Wuhan University, Wuhan, China
| | - Hu Chen
- Department of Cardiology, Renmin Hospital of Wuhan University, Wuhan, China.,Cardiac Autonomic Nervous Research Center, Wuhan University, Wuhan, China.,Department of Cardiology Cardiovascular Research Institute, Wuhan University, Wuhan, China.,Hubei Key Laboratory of Cardiology, Wuhan, China
| | - Huixin Zhou
- Department of Cardiology, Renmin Hospital of Wuhan University, Wuhan, China.,Cardiac Autonomic Nervous Research Center, Wuhan University, Wuhan, China.,Department of Cardiology Cardiovascular Research Institute, Wuhan University, Wuhan, China.,Hubei Key Laboratory of Cardiology, Wuhan, China
| | - Zhihao Liu
- Department of Cardiology, Renmin Hospital of Wuhan University, Wuhan, China.,Cardiac Autonomic Nervous Research Center, Wuhan University, Wuhan, China.,Department of Cardiology Cardiovascular Research Institute, Wuhan University, Wuhan, China.,Hubei Key Laboratory of Cardiology, Wuhan, China
| | - Zihan Liu
- Department of Cardiology, Renmin Hospital of Wuhan University, Wuhan, China.,Cardiac Autonomic Nervous Research Center, Wuhan University, Wuhan, China.,Department of Cardiology Cardiovascular Research Institute, Wuhan University, Wuhan, China.,Hubei Key Laboratory of Cardiology, Wuhan, China
| | - Zhihao Liu
- Department of Cardiology, Renmin Hospital of Wuhan University, Wuhan, China.,Cardiac Autonomic Nervous Research Center, Wuhan University, Wuhan, China.,Department of Cardiology Cardiovascular Research Institute, Wuhan University, Wuhan, China.,Hubei Key Laboratory of Cardiology, Wuhan, China
| | - Yuyang Zhou
- Department of Cardiology, Renmin Hospital of Wuhan University, Wuhan, China.,Cardiac Autonomic Nervous Research Center, Wuhan University, Wuhan, China.,Department of Cardiology Cardiovascular Research Institute, Wuhan University, Wuhan, China.,Hubei Key Laboratory of Cardiology, Wuhan, China
| | - Xiaoya Zhou
- Department of Cardiology, Renmin Hospital of Wuhan University, Wuhan, China.,Cardiac Autonomic Nervous Research Center, Wuhan University, Wuhan, China.,Department of Cardiology Cardiovascular Research Institute, Wuhan University, Wuhan, China.,Hubei Key Laboratory of Cardiology, Wuhan, China
| | - Lilei Yu
- Department of Cardiology, Renmin Hospital of Wuhan University, Wuhan, China.,Cardiac Autonomic Nervous Research Center, Wuhan University, Wuhan, China.,Department of Cardiology Cardiovascular Research Institute, Wuhan University, Wuhan, China.,Hubei Key Laboratory of Cardiology, Wuhan, China
| | - Hong Jiang
- Department of Cardiology, Renmin Hospital of Wuhan University, Wuhan, China.,Cardiac Autonomic Nervous Research Center, Wuhan University, Wuhan, China.,Department of Cardiology Cardiovascular Research Institute, Wuhan University, Wuhan, China.,Hubei Key Laboratory of Cardiology, Wuhan, China
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23
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Effects of exogenous melatonin on sleep quality and menopausal symptoms in menopausal women: a systematic review and meta-analysis of randomized controlled trials. ACTA ACUST UNITED AC 2021; 28:717-725. [PMID: 33784263 DOI: 10.1097/gme.0000000000001757] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
IMPORTANCE Because of the bothersome symptoms during women's menopausal period and the severe side effects of hormone therapy, it is meaningful to find new breakthroughs in improving menopausal women's quality of life. OBJECTIVE We performed a systematic review and meta-analysis of randomized controlled trials (RCTs) evaluating melatonin intake on the improvement of sleep quality, general menopausal symptom, mood states, as well as interaction of estradiol levels and body mass index (BMI) in menopausal women. EVIDENCE REVIEW We used the search terms "melatonin" together with "menopause" or "post-menopause" or "peri-menopause" in multiple databases online including PubMed, Web of Science, Embase, Clinical trial, Cochrane Library, and China National Knowledge Infrastructure from the first publication year to October 2020. Interesting data included characteristics of the study design, study participants, intervention, and outcome measures. Risk of biases in RCTs was evaluated with the Cochrane tool. Fixed-effect models and random-effect models were used for meta-analysis according to heterogeneity. Preferred Reporting Items for Systematic Reviews and Meta-Analyses guidelines were followed in our study. FINDINGS Eight cohorts (n = 812) evaluating the effects of melatonin in menopausal women were included. Melatonin was used in every study with differences existing in dose (1 mg - 5 mg) and duration (3 to 12 mo). Improved physical symptoms (standard mean difference [SMD] -0.376; 95% CI, -0.599 to -0.153, P = 0.001) merged in four RCTs. Melatonin treatment resulted in no benefits to sleep quality (SMD -0.659; 95% CI, -1.535 to 0.217, P = 0.141) and general menopause symptoms (SMD -0.625; 95% CI, -1.354 to 0.105, P = 0.093) in four and three RCTs, respectively. More specifically, melatonin did not solve the psychological (SMD -0.026; 95% CI, -0.372 to 0.321, P = 0.884, I2 = 70.3%), sexual (SMD -0.661; 95% CI, -1.416 to 0.093, P = 0.086) and vasomotor (SMD -0.256; 95% CI, -0.701 to 0.188, P = 0.258) issues. No significant changes were observed in anxiety (SMD 0.018; 95% CI, -0.519 to 0.556, P = 0.946), depression (SMD 0.133; 95% CI, -0.435 to 0.702, P = 0.646), BMI (weighted mean difference 0.029 kg/m2; 95% CI, -0.183 to 0.240, P = 0.790) or estradiol levels (weighted mean difference 0.016 pg/mL; 95% CI, -1.220 to 1.252, P = 0.980). CONCLUSIONS Melatonin seems to improve physical symptoms in menopausal women, but the general menopausal symptoms, sleep quality, mood state, estradiol levels, and BMI did not improve under melatonin intervention. However, multiple large-scale clinical randomized trials are needed to validate our conclusions.
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24
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Segovia-Roldan M, Diez ER, Pueyo E. Melatonin to Rescue the Aged Heart: Antiarrhythmic and Antioxidant Benefits. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2021; 2021:8876792. [PMID: 33791076 PMCID: PMC7984894 DOI: 10.1155/2021/8876792] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/21/2020] [Revised: 01/16/2021] [Accepted: 01/23/2021] [Indexed: 12/19/2022]
Abstract
Aging comes with gradual loss of functions that increase the vulnerability to disease, senescence, and death. The mechanisms underlying these processes are linked to a prolonged imbalance between damage and repair. Damaging mechanisms include oxidative stress, mitochondrial dysfunction, chronodisruption, inflammation, and telomere attrition, as well as genetic and epigenetic alterations. Several endogenous tissue repairing mechanisms also decrease. These alterations associated with aging affect the entire organism. The most devastating manifestations involve the cardiovascular system and may lead to lethal cardiac arrhythmias. Together with structural remodeling, electrophysiological and intercellular communication alterations during aging predispose to arrhythmic events. Despite the knowledge on repairing mechanisms in the cardiovascular system, effective antiaging strategies able to reduce the risk of arrhythmias are still missing. Melatonin is a promising therapeutic candidate due to its pleiotropic actions. This indoleamine regulates chronobiology and endocrine physiology. Of relevance, melatonin is an antiaging, antioxidant, antiapoptotic, antiarrhythmic, immunomodulatory, and antiproliferative molecule. This review focuses on the protective effects of melatonin on age-induced cardiac functional and structural alterations, potentially becoming a new fountain of youth for the heart.
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Affiliation(s)
- Margarita Segovia-Roldan
- Biomedical Signal Interpretation and Computational Simulation (BSICoS), I3A, Universidad de Zaragoza, IIS Aragón and CIBER-BBN, Spain
| | | | - Esther Pueyo
- Biomedical Signal Interpretation and Computational Simulation (BSICoS), I3A, Universidad de Zaragoza, IIS Aragón and CIBER-BBN, Spain
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25
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Jiang W, Wu H, Guo R, Xu X, Wang Y, Jiang X, Wang Y, Yan X, Gu W, Liu X, Cao F, Li Y, Han T, Sun C. Dibromoacetic acid exposure is associated with abnormal melatonin rhythm in rats via inhibition of p-CREB1-AANAT signalling pathway. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2021; 208:111401. [PMID: 33038730 DOI: 10.1016/j.ecoenv.2020.111401] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/27/2020] [Revised: 09/18/2020] [Accepted: 09/21/2020] [Indexed: 06/11/2023]
Abstract
Dibromoacetic acid (DBA) is a by-product of disinfection in drinking water, which could cause many adverse effects in test animals. However, little research on its neurotoxicity has been conducted, and its mechanism has not been elucidated. In the present study, ninety Sprague-Dawley rats were administered DBA at doses of 0, 30, and 90 mg/kg body weight for 28 days via oral gavage. We found that DBA could induce obvious neurotoxicity in the pineal gland as indicated by histological changes and impaired rhythm of melatonin in pineal and serum. In the mechanism study, transcriptome data showed that DBA exposure could induce 732 differential expression genes. Besides, GO and KEGG analysis results indicated that these genes were enriched in circadian rhythms, among which CREB1 had the most significant fold change. And immunofluorescence staining (IF) and immunohistochemical staining (IHC) results showed that the number of amber-colored masculine neurons for the p-CREB1 in the 90 mg/kg group was markedly lower, and staining for the p-CREB1 was weaker. Moreover, the results of PCR and western blot showed that DBA exposure could down-regulate the expressions of CREB1 and p-CREB1, leading to the decreased expressions of gene and protein of arylalkylamine N-acetyltransferase (AANAT), and then resulting in the impaired melatonin synthesis in the pineal and serum. In conclusion, DBA exposure is associated with abnormal melatonin rhythm via inhibition of the p-CREB1-AANAT signalling pathway.
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Affiliation(s)
- Wenbo Jiang
- Department of Toxicology, College of Public Health, Harbin Medical University, Harbin, Heilongjiang Province 150081, PR China; National Key Discipline, Department of Nutrition and Food Hygiene, School of Public Health, Harbin Medical University, Harbin, Heilongjiang Province 150081, PR China
| | - Huanyu Wu
- National Key Discipline, Department of Nutrition and Food Hygiene, School of Public Health, Harbin Medical University, Harbin, Heilongjiang Province 150081, PR China
| | - Rui Guo
- National Key Discipline, Department of Nutrition and Food Hygiene, School of Public Health, Harbin Medical University, Harbin, Heilongjiang Province 150081, PR China
| | - Xiaoqing Xu
- National Key Discipline, Department of Nutrition and Food Hygiene, School of Public Health, Harbin Medical University, Harbin, Heilongjiang Province 150081, PR China
| | - Yue Wang
- National Key Discipline, Department of Nutrition and Food Hygiene, School of Public Health, Harbin Medical University, Harbin, Heilongjiang Province 150081, PR China
| | - XiTao Jiang
- College of Engineering, IT and Environment, Charles Darwin University, Darwin, Northern Territory 0810, Australia
| | - Yu Wang
- National Key Discipline, Department of Nutrition and Food Hygiene, School of Public Health, Harbin Medical University, Harbin, Heilongjiang Province 150081, PR China
| | - Xuemin Yan
- National Key Discipline, Department of Nutrition and Food Hygiene, School of Public Health, Harbin Medical University, Harbin, Heilongjiang Province 150081, PR China
| | - Wenbo Gu
- National Key Discipline, Department of Nutrition and Food Hygiene, School of Public Health, Harbin Medical University, Harbin, Heilongjiang Province 150081, PR China
| | - Xin Liu
- National Key Discipline, Department of Nutrition and Food Hygiene, School of Public Health, Harbin Medical University, Harbin, Heilongjiang Province 150081, PR China
| | - Fengyu Cao
- Department of Clinical Laboratory, Jiamusi Maternal and Child Health Care Hospital, Jiamusi, Heilongjiang Province 154000, PR China
| | - Ying Li
- Department of Toxicology, College of Public Health, Harbin Medical University, Harbin, Heilongjiang Province 150081, PR China; National Key Discipline, Department of Nutrition and Food Hygiene, School of Public Health, Harbin Medical University, Harbin, Heilongjiang Province 150081, PR China; College of Engineering, IT and Environment, Charles Darwin University, Darwin, Northern Territory 0810, Australia; Department of Clinical Laboratory, Jiamusi Maternal and Child Health Care Hospital, Jiamusi, Heilongjiang Province 154000, PR China.
| | - Tianshu Han
- Department of Toxicology, College of Public Health, Harbin Medical University, Harbin, Heilongjiang Province 150081, PR China; National Key Discipline, Department of Nutrition and Food Hygiene, School of Public Health, Harbin Medical University, Harbin, Heilongjiang Province 150081, PR China; College of Engineering, IT and Environment, Charles Darwin University, Darwin, Northern Territory 0810, Australia; Department of Clinical Laboratory, Jiamusi Maternal and Child Health Care Hospital, Jiamusi, Heilongjiang Province 154000, PR China.
| | - Changhao Sun
- Department of Toxicology, College of Public Health, Harbin Medical University, Harbin, Heilongjiang Province 150081, PR China; National Key Discipline, Department of Nutrition and Food Hygiene, School of Public Health, Harbin Medical University, Harbin, Heilongjiang Province 150081, PR China; College of Engineering, IT and Environment, Charles Darwin University, Darwin, Northern Territory 0810, Australia; Department of Clinical Laboratory, Jiamusi Maternal and Child Health Care Hospital, Jiamusi, Heilongjiang Province 154000, PR China.
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26
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Morris G, Walker AJ, Walder K, Berk M, Marx W, Carvalho AF, Maes M, Puri BK. Increasing Nrf2 Activity as a Treatment Approach in Neuropsychiatry. Mol Neurobiol 2021; 58:2158-2182. [PMID: 33411248 DOI: 10.1007/s12035-020-02212-w] [Citation(s) in RCA: 46] [Impact Index Per Article: 15.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2020] [Accepted: 11/16/2020] [Indexed: 02/07/2023]
Abstract
Nuclear factor erythroid 2-related factor 2 (Nrf2) is a transcription factor encoded by NFE2L2. Under oxidative stress, Nrf2 does not undergo its normal cytoplasmic degradation but instead travels to the nucleus, where it binds to a DNA promoter and initiates transcription of anti-oxidative genes. Nrf2 upregulation is associated with increased cellular levels of glutathione disulfide, glutathione peroxidase, glutathione transferases, thioredoxin and thioredoxin reductase. Given its key role in governing the cellular antioxidant response, upregulation of Nrf2 has been suggested as a common therapeutic target in neuropsychiatric illnesses such as major depressive disorder, bipolar disorder and schizophrenia, which are associated with chronic oxidative and nitrosative stress, characterised by elevated levels of reactive oxygen species, nitric oxide and peroxynitrite. These processes lead to extensive lipid peroxidation, protein oxidation and carbonylation, and oxidative damage to nuclear and mitochondrial DNA. Intake of N-acetylcysteine, coenzyme Q10 and melatonin is accompanied by increased Nrf2 activity. N-acetylcysteine intake is associated with improved cerebral mitochondrial function, decreased central oxidative and nitrosative stress, reduced neuroinflammation, alleviation of endoplasmic reticular stress and suppression of the unfolded protein response. Coenzyme Q10, which acts as a superoxide scavenger in neuroglial mitochondria, instigates mitohormesis, ameliorates lipid peroxidation in the inner mitochondrial membrane, activates uncoupling proteins, promotes mitochondrial biogenesis and has positive effects on the plasma membrane redox system. Melatonin, which scavenges mitochondrial free radicals, inhibits mitochondrial nitric oxide synthase, restores mitochondrial calcium homeostasis, deacetylates and activates mitochondrial SIRT3, ameliorates increased permeability of the blood-brain barrier and intestine and counters neuroinflammation and glutamate excitotoxicity.
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Affiliation(s)
- G Morris
- Institute for Mental and Physical Health and Clinical Translation (IMPACT), Barwon Health, School of Medicine, Deakin University, Geelong, VIC, Australia
| | - A J Walker
- Institute for Mental and Physical Health and Clinical Translation (IMPACT), Barwon Health, School of Medicine, Deakin University, Geelong, VIC, Australia
| | - K Walder
- Institute for Mental and Physical Health and Clinical Translation (IMPACT), Barwon Health, School of Medicine, Deakin University, Geelong, VIC, Australia
| | - M Berk
- Institute for Mental and Physical Health and Clinical Translation (IMPACT), Barwon Health, School of Medicine, Deakin University, Geelong, VIC, Australia.,CMMR Strategic Research Centre, School of Medicine, Deakin University, Geelong, VIC, Australia.,Orygen, The National Centre of Excellence in Youth Mental Health, The Department of Psychiatry and the Florey Institute for Neuroscience and Mental Health, The University of Melbourne, Parkville, VIC, Australia
| | - W Marx
- Institute for Mental and Physical Health and Clinical Translation (IMPACT), Barwon Health, School of Medicine, Deakin University, Geelong, VIC, Australia
| | - A F Carvalho
- Department of Psychiatry, University of Toronto, Toronto, ON, Canada.,Centre for Addiction and Mental Health (CAMH), Toronto, ON, Canada
| | - M Maes
- Institute for Mental and Physical Health and Clinical Translation (IMPACT), Barwon Health, School of Medicine, Deakin University, Geelong, VIC, Australia.,Department of Psychiatry, Chulalongkorn University, Bangkok, Thailand
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27
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Jiang J, Liang S, Zhang J, Du Z, Xu Q, Duan J, Sun Z. Melatonin ameliorates PM 2.5 -induced cardiac perivascular fibrosis through regulating mitochondrial redox homeostasis. J Pineal Res 2021; 70:e12686. [PMID: 32730639 PMCID: PMC7757260 DOI: 10.1111/jpi.12686] [Citation(s) in RCA: 43] [Impact Index Per Article: 14.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/01/2020] [Revised: 07/07/2020] [Accepted: 07/17/2020] [Indexed: 12/13/2022]
Abstract
Fine particulate matter (PM2.5 ) exposure is correlated with the risk of developing cardiac fibrosis. Melatonin is a major secretory product of the pineal gland that has been reported to prevent fibrosis. However, whether melatonin affects the adverse health effects of PM2.5 exposure has not been investigated. Thus, this study was aimed to investigate the protective effect of melatonin against PM2.5 -accelerated cardiac fibrosis. The echocardiography revealed that PM2.5 had impaired both systolic and diastolic cardiac function in ApoE-/- mice. Histopathological analysis demonstrated that PM2.5 induced cardiomyocyte hypertrophy and fibrosis, particularly perivascular fibrosis, while the melatonin administration was effective in alleviating PM2.5 -induced cardiac dysfunction and fibrosis in mice. Results of electron microscopy and confocal scanning laser microscope confirmed that melatonin had restorative effects against impaired mitochondrial ultrastructure and augmented mitochondrial ROS generation in PM2.5 -treated group. Further investigation revealed melatonin administration could significantly reverse the PM2.5 -induced phenotypic modulation of cardiac fibroblasts into myofibroblasts. For the first time, our study found that melatonin effectively alleviates PM2.5 -induced cardiac dysfunction and fibrosis via inhibiting mitochondrial oxidative injury and regulating SIRT3-mediated SOD2 deacetylation. Our findings indicate that melatonin could be a therapy medicine for prevention and treatment of air pollution-associated cardiac diseases.
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MESH Headings
- Acetylation
- Animals
- Antioxidants/pharmacology
- Cardiomyopathies/chemically induced
- Cardiomyopathies/metabolism
- Cardiomyopathies/pathology
- Cardiomyopathies/prevention & control
- Cardiotoxicity
- Cell Line
- Disease Models, Animal
- Fibroblasts/drug effects
- Fibroblasts/metabolism
- Fibroblasts/pathology
- Fibrosis
- Humans
- Hyperlipidemias/complications
- Male
- Melatonin/pharmacology
- Mice, Knockout, ApoE
- Mitochondria, Heart/drug effects
- Mitochondria, Heart/metabolism
- Mitochondria, Heart/ultrastructure
- Myocytes, Cardiac/drug effects
- Myocytes, Cardiac/metabolism
- Myocytes, Cardiac/ultrastructure
- Oxidation-Reduction
- Oxidative Stress/drug effects
- Particle Size
- Particulate Matter
- Protein Processing, Post-Translational
- Reactive Oxygen Species/metabolism
- Sirtuin 3/metabolism
- Superoxide Dismutase/metabolism
- Mice
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Affiliation(s)
- Jinjin Jiang
- Department of Toxicology and Sanitary ChemistrySchool of Public HealthCapital Medical UniversityBeijingChina
- Beijing Key Laboratory of Environmental ToxicologyCapital Medical UniversityBeijingChina
| | - Shuang Liang
- Department of Toxicology and Sanitary ChemistrySchool of Public HealthCapital Medical UniversityBeijingChina
- Beijing Key Laboratory of Environmental ToxicologyCapital Medical UniversityBeijingChina
| | - Jingyi Zhang
- Department of Toxicology and Sanitary ChemistrySchool of Public HealthCapital Medical UniversityBeijingChina
- Beijing Key Laboratory of Environmental ToxicologyCapital Medical UniversityBeijingChina
| | - Zhou Du
- Department of Toxicology and Sanitary ChemistrySchool of Public HealthCapital Medical UniversityBeijingChina
- Beijing Key Laboratory of Environmental ToxicologyCapital Medical UniversityBeijingChina
| | - Qing Xu
- Core Facilities for ElectrophysiologyCore Facilities CenterCapital Medical UniversityBeijingChina
| | - Junchao Duan
- Department of Toxicology and Sanitary ChemistrySchool of Public HealthCapital Medical UniversityBeijingChina
- Beijing Key Laboratory of Environmental ToxicologyCapital Medical UniversityBeijingChina
| | - Zhiwei Sun
- Department of Toxicology and Sanitary ChemistrySchool of Public HealthCapital Medical UniversityBeijingChina
- Beijing Key Laboratory of Environmental ToxicologyCapital Medical UniversityBeijingChina
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Zhang J, Lu J, Zhu H, Zhou X, Wei X, Gu M. Association of Serum Melatonin Level with Mild Cognitive Impairment in Type 2 Diabetic Patients: A Cross-Sectional Study. Int J Endocrinol 2021; 2021:5566019. [PMID: 34007273 PMCID: PMC8099517 DOI: 10.1155/2021/5566019] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/19/2021] [Revised: 03/16/2021] [Accepted: 04/07/2021] [Indexed: 12/15/2022] Open
Abstract
OBJECTIVES Melatonin is an essential neuroendocrine hormone that participates in the regulation of sleep rhythm and cognitive function. This study aimed to determine serum melatonin levels with mild cognitive impairment (MCI) in patients with type 2 diabetes (T2DM). METHODS A total of 247 T2DM patients were recruited in this retrospective study and divided into 75 subjects with MCI and 172 with normal cognition. Cognitive function was evaluated by the Montreal Cognitive Assessment (MoCA). Their blood sample was examined for the level of melatonin and other biochemical parameters. RESULTS Melatonin concentration was decreased in MCI patients to non-MCI patients (P < 0.001). Melatonin level was negatively correlated with age (r = -0.202; P = 0.001), diabetes duration (r = -0.282; P < 0.001), serum HbA1c (r = -0.195; P = 0.002), hs-CRP (r = -0.324; P < 0.001), and TSH (r = -0.184; P = 0.004) levels and positively correlated with MoCA score, serum HDL-C (r = 0.145; P < 0.001), FT3 (r = 0.241; P < 0.001), and FT4 (r = 0.169; P = 0.008) levels. The multivariable analysis indicated that fewer years of formal education, longer diabetes duration, higher serum HbA1c, higher serum hs-CRP, and lower serum melatonin are the predisposing factors for MCI. CONCLUSION Lower melatonin level was associated with cognitive impairment in patients with T2DM. Melatonin might serve as a potential protective molecule against cognitive dysfunction in T2DM.
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Affiliation(s)
- Jichen Zhang
- The Graduate School, Ningxia Medical University, Yinchuan, Ningxia 750005, China
- Department of Endocrinology, Shanghai Pudong New District Gongli Hospital, Second Military Medical University, Shanghai 200135, China
| | - Jiancan Lu
- Department of Endocrinology, Shanghai Pudong New District Gongli Hospital, Second Military Medical University, Shanghai 200135, China
| | - Hongling Zhu
- Department of Endocrinology, Shanghai Pudong New District Gongli Hospital, Second Military Medical University, Shanghai 200135, China
| | - Xinglu Zhou
- Department of Endocrinology, Shanghai Pudong New District Gongli Hospital, Second Military Medical University, Shanghai 200135, China
| | - Xijuan Wei
- Department of Endocrinology, Shanghai Pudong New District Gongli Hospital, Second Military Medical University, Shanghai 200135, China
| | - Mingjun Gu
- Department of Endocrinology, Shanghai Pudong New District Gongli Hospital, Second Military Medical University, Shanghai 200135, China
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29
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Maleki Dana P, Reiter RJ, Hallajzadeh J, Asemi Z, Mansournia MA, Yousefi B. Melatonin as a potential inhibitor of kidney cancer: A survey of the molecular processes. IUBMB Life 2020; 72:2355-2365. [PMID: 32918860 DOI: 10.1002/iub.2384] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2020] [Revised: 08/16/2020] [Accepted: 08/18/2020] [Indexed: 12/15/2022]
Abstract
Studies have shown that despite the decreasing mortality rates of kidney cancer patients, its incidence is increasing. Therefore, a comprehensive re-evaluation of treatment options is necessary to provide appropriate treatments for the increasing number of patients. Moreover, the side effects caused by surgery, which is the main treatment of this disease, may lead to higher morbidity rates. Consequently, new safer approaches must be examined and considered. Major advancements have been made in the field of targeted agents as well as treatments based on immunotherapy since renal cell carcinoma (RCC) does not respond well to chemotherapy. While the therapeutic options for this cancer are increasing, the resulting complexity of selecting the best strategy for treating the patients is daunting. Moreover, each therapeutic option must be evaluated concerning toxicity, cost, and clinical advantages. Several characteristics, which are beneficial for cancer therapies have been attributed to melatonin. For decades, investigations have explored the application of melatonin in the treatment of cancer; insufficient attention has been paid to this molecule at the clinical level. Melatonin plays a role in cancer therapy due to its anti-tumor effects as well as by enhancing the efficacy of other drugs as an adjuvant. In this review, we discuss different roles of melatonin in the treatment of kidney cancer. The studies concerned with the applications of melatonin as an adjuvant in the immunotherapy of patients with kidney cancer are summarized. Also, we highlight the apoptotic and anti-angiogenic effects of melatonin on renal cancer cells which are mediated by different molecules (e.g., HIF-1 and VEGF, ADAMTS1, and MMP-9) and signaling pathways (e.g., P56, P52, and JNK). Furthermore, we take a look into available data on melatonin's ability to reduce the toxicities caused by kidney carcinogens, including ochratoxin A, potassium bromate, and Fe-NTA.
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Affiliation(s)
- Parisa Maleki Dana
- Research Center for Biochemistry and Nutrition in Metabolic Diseases, Kashan University of Medical Sciences, Kashan, Iran
| | - Russel J Reiter
- Department of Cellular and Structural Biology, University of Texas Health Science Center, San Antonio, Texas, USA
| | - Jamal Hallajzadeh
- Department of Biochemistry and Nutrition, Maragheh University of Medical Sciences, Maragheh, Iran
| | - Zatollah Asemi
- Research Center for Biochemistry and Nutrition in Metabolic Diseases, Kashan University of Medical Sciences, Kashan, Iran
| | - Mohammad Ali Mansournia
- Department of Epidemiology and Biostatistics, Tehran University of Medical Sciences, Tehran, Iran
| | - Bahman Yousefi
- Stem Cell Research Center, Tabriz University of Medical Sciences, Tabriz, Iran.,Department of Biochemistry, Faculty of Medicine, Tabriz University of Medical Sciences, Tabriz, Iran
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Chitimus DM, Popescu MR, Voiculescu SE, Panaitescu AM, Pavel B, Zagrean L, Zagrean AM. Melatonin's Impact on Antioxidative and Anti-Inflammatory Reprogramming in Homeostasis and Disease. Biomolecules 2020; 10:biom10091211. [PMID: 32825327 PMCID: PMC7563541 DOI: 10.3390/biom10091211] [Citation(s) in RCA: 145] [Impact Index Per Article: 36.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2020] [Revised: 07/30/2020] [Accepted: 08/18/2020] [Indexed: 12/12/2022] Open
Abstract
There is a growing consensus that the antioxidant and anti-inflammatory properties of melatonin are of great importance in preserving the body functions and homeostasis, with great impact in the peripartum period and adult life. Melatonin promotes adaptation through allostasis and stands out as an endogenous, dietary, and therapeutic molecule with important health benefits. The anti-inflammatory and antioxidant effects of melatonin are intertwined and are exerted throughout pregnancy and later during development and aging. Melatonin supplementation during pregnancy can reduce ischemia-induced oxidative damage in the fetal brain, increase offspring survival in inflammatory states, and reduce blood pressure in the adult offspring. In adulthood, disturbances in melatonin production negatively impact the progression of cardiovascular risk factors and promote cardiovascular and neurodegenerative diseases. The most studied cardiovascular effects of melatonin are linked to hypertension and myocardial ischemia/reperfusion injury, while the most promising ones are linked to regaining control of metabolic syndrome components. In addition, there might be an emerging role for melatonin as an adjuvant in treating coronavirus disease 2019 (COVID 19). The present review summarizes and comments on important data regarding the roles exerted by melatonin in homeostasis and oxidative stress and inflammation related pathologies.
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Affiliation(s)
- Diana Maria Chitimus
- Division of Physiology and Neuroscience, Department of Functional Sciences, “Carol Davila” University of Medicine and Pharmacy, 010164 Bucharest, Romania; (D.M.C.); (S.E.V.); (B.P.); (L.Z.)
| | - Mihaela Roxana Popescu
- Department of Cardiology, “Carol Davila” University of Medicine and Pharmacy, Elias University Hospital, 010164 Bucharest, Romania;
| | - Suzana Elena Voiculescu
- Division of Physiology and Neuroscience, Department of Functional Sciences, “Carol Davila” University of Medicine and Pharmacy, 010164 Bucharest, Romania; (D.M.C.); (S.E.V.); (B.P.); (L.Z.)
| | - Anca Maria Panaitescu
- Department of Obstetrics and Gynecology, “Carol Davila” University of Medicine and Pharmacy, Filantropia Clinical Hospital, 010164 Bucharest, Romania;
| | - Bogdan Pavel
- Division of Physiology and Neuroscience, Department of Functional Sciences, “Carol Davila” University of Medicine and Pharmacy, 010164 Bucharest, Romania; (D.M.C.); (S.E.V.); (B.P.); (L.Z.)
| | - Leon Zagrean
- Division of Physiology and Neuroscience, Department of Functional Sciences, “Carol Davila” University of Medicine and Pharmacy, 010164 Bucharest, Romania; (D.M.C.); (S.E.V.); (B.P.); (L.Z.)
| | - Ana-Maria Zagrean
- Division of Physiology and Neuroscience, Department of Functional Sciences, “Carol Davila” University of Medicine and Pharmacy, 010164 Bucharest, Romania; (D.M.C.); (S.E.V.); (B.P.); (L.Z.)
- Correspondence:
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31
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Domínguez-Rodríguez A, Reiter RJ, Abreu-González P, Marik PE. [Melatonin, coronavirus, cardiovascular disease, and the geriatric emergency: let's use everything we have!]. Rev Esp Cardiol 2020; 73:1081-1082. [PMID: 32836663 PMCID: PMC7332906 DOI: 10.1016/j.recesp.2020.06.006] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
- Alberto Domínguez-Rodríguez
- Departamento de Cardiología, Hospital Universitario de Canarias San Cristóbal de La Laguna, Santa Cruz de Tenerife, España
- Facultad de Ciencias de la Salud, Universidad Europea de Canarias, La Orotava, Santa Cruz de Tenerife, España
- Centro de Investigación Biomédica en Red Enfermedades Cardiovaculares, CIBERCV, Madrid, España
| | - Russel J Reiter
- Department of Cell Systems and Anatomy, UT Health San Antonio, San Antonio, Texas, Estados Unidos
| | - Pedro Abreu-González
- Departamento de Fisiología, Facultad de Medicina, Universidad de La Laguna, San Cristóbal de La Laguna, Santa Cruz de Tenerife, España
| | - Paul E Marik
- Division of Pulmonary and Critical Care Medicine, Eastern Virginia Medical School, Norfolk, Virginia, Estados Unidos
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32
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Melatonin, coronavirus, cardiovascular disease, and the geriatric emergency: let's use everything we have! ACTA ACUST UNITED AC 2020; 73:1081-1082. [PMID: 32593625 PMCID: PMC7314451 DOI: 10.1016/j.rec.2020.06.005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2020] [Accepted: 06/04/2020] [Indexed: 11/23/2022]
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33
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Melatonin enhances atherosclerotic plaque stability by inducing prolyl-4-hydroxylase α1 expression. J Hypertens 2020; 37:964-971. [PMID: 30335670 DOI: 10.1097/hjh.0000000000001979] [Citation(s) in RCA: 29] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
OBJECTIVE Melatonin, an endogenous neurohormone secreted predominately by the pineal gland, has a variety of physiological functions. However, its protective role in atherosclerosis is not clear. In this study, we sought to investigate the potential effects of melatonin in modulating atherosclerotic plaque stability in apolipoprotein E knockout (ApoE) mice. METHOD AND RESULTS Smooth muscle cells were treated with melatonin, which significantly increased mRNA and protein levels of a key intracellular enzyme essential for collagen maturation and secretion, prolyl-4-hydroxylase α1 (P4Hα1). Mechanistically, melatonin increased Akt phosphorylation and transcriptional activation of specificity protein 1 (Sp1), which bound with the P4Hα1 promoter and then induced P4Hα1 expression. Pretreatment with either Akt inhibitor LY294002 or Sp1 inhibitor mithramycin A (MTM) could inhibit melatonin-induced P4Hα1 expression. Finally, atherosclerotic lesions were induced by placing a perivascular collar on the right common carotid artery of ApoE mice, which were received with or without different doses of melatonin or MTM. High-dose melatonin enhanced atherosclerotic plaque stability in ApoE mice in vivo by inducing the expression of P4Hα1, which was reversed by MTM. CONCLUSION We propose that melatonin supplementation may provide a novel and promising approach to atherosclerosis treatment.
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Soni SK, Kumar D, Singaravel M. Melatonin-induced phase and dose responses in a diurnal mammal, Funambulus pennantii. Chronobiol Int 2020; 37:641-651. [DOI: 10.1080/07420528.2020.1758127] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
Affiliation(s)
- Sanjeev Kumar Soni
- Department of Zoology, Institute of Science, Banaras Hindu University, Varanasi, Uttar Pradesh, India
| | - Dhanananajay Kumar
- Department of Pharmaceutical Engineering & Technology, Indian Institute of Technology (Banaras Hindu Universty), Varanasi, Uttar Pradesh, India
| | - Muniyandi Singaravel
- Department of Zoology, Institute of Science, Banaras Hindu University, Varanasi, Uttar Pradesh, India
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35
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T. cruzi infection among aged rats: Melatonin as a promising therapeutic molecule. Exp Gerontol 2020; 135:110922. [PMID: 32151734 DOI: 10.1016/j.exger.2020.110922] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2019] [Revised: 02/12/2020] [Accepted: 03/05/2020] [Indexed: 12/12/2022]
Abstract
Although T. cruzi was identified as the cause of Chagas disease more than 100 years ago, satisfactory treatments still do not exist, especially for chronic disease. Here we review work suggesting that melatonin could have promise as a Chagas therapeutic. Melatonin has remarkably diverse actions. It is an immunomodulator, an anti-inflammatory, an antioxidant, a free radical scavenger, and has antiapoptotic and anti-aging effects. The elderly (aged 60 years or more) as a group are growing faster than any other age group. Here we discuss the major effects and the mechanisms of action of melatonin on aged T. cruzi-infected rats. Melatonin's protective effects may be consequences of its cooperative antioxidant and immunomodulatory actions. Melatonin modulates oxidative damage, inducing an antioxidant response and reversing age-related thymus regression. Its protective actions could be the result of its anti-apoptotic activity, and by its counteracting the excessive production of corticosterone. This review describes our work showing that host age plays an important and variable influence on the progression of systemic T. cruzi infection and supporting the hypothesis that melatonin should be considered as a powerful therapeutic compound with multiple activities that can improve host homeostasis during experimental T. cruzi infection.
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Kim JY, Park JH, Jeon EJ, Leem J, Park KK. Melatonin Prevents Transforming Growth Factor-β1-Stimulated Transdifferentiation of Renal Interstitial Fibroblasts to Myofibroblasts by Suppressing Reactive Oxygen Species-Dependent Mechanisms. Antioxidants (Basel) 2020; 9:antiox9010039. [PMID: 31906396 PMCID: PMC7022732 DOI: 10.3390/antiox9010039] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2019] [Revised: 12/20/2019] [Accepted: 12/30/2019] [Indexed: 12/18/2022] Open
Abstract
Accumulating evidence suggests that the pineal hormone melatonin displays protective effects against renal fibrosis, but the mechanisms remain poorly understood. Here, we investigate the effect of the pineal hormone on transdifferentiation of renal fibroblasts to myofibroblasts invoked by transforming growth factor-β1 (TGF-β1). Increased proliferation and activation of renal interstitial fibroblasts after TGF-β1 treatment were attenuated by melatonin pretreatment. Mechanistically, melatonin suppressed Smad2/3 phosphorylation and nuclear co-localization of their phosphorylated forms and Smad4 after TGF-β1 stimulation. In addition, increased phosphorylations of Akt, extracellular signal-regulated kinase 1/2, and p38 after TGF-β1 treatment were also suppressed by the hormone. These effects of melatonin were not affected by pharmacological and genetic inhibition of its membrane receptors. Furthermore, melatonin significantly reversed an increase of intracellular reactive oxygen species (ROS) and malondialdehyde levels, and a decrease of the reduced glutathione/oxidized glutathione ratio after TGF-β1 treatment. Finally, TGF-β1-induced proliferation and activation were also suppressed by N-acetylcysteine. Altogether, these findings suggest that the pineal hormone melatonin prevents TGF-β1-induced transdifferentiation of renal interstitial fibroblasts to myofibroblasts via inhibition of Smad and non-Smad signaling cadcades by inhibiting ROS-mediated mechanisms in its receptor-independent manner.
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Affiliation(s)
- Jung-Yeon Kim
- Department of Immunology, School of Medicine, Catholic University of Daegu, Daegu 42472, Korea;
| | - Jae-Hyung Park
- Department of Physiology, School of Medicine, Keimyung University, Daegu 42601, Korea;
| | - Eon Ju Jeon
- Department of Internal Medicine, School of Medicine, Catholic University of Daegu, Daegu 42472, Korea
- Correspondence: (E.J.J.); (J.L.)
| | - Jaechan Leem
- Department of Immunology, School of Medicine, Catholic University of Daegu, Daegu 42472, Korea;
- Correspondence: (E.J.J.); (J.L.)
| | - Kwan-Kyu Park
- Department of Pathology, School of Medicine, Catholic University of Daegu, Daegu 42472, Korea;
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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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Gil-Martín E, Egea J, Reiter RJ, Romero A. The emergence of melatonin in oncology: Focus on colorectal cancer. Med Res Rev 2019; 39:2239-2285. [PMID: 30950095 DOI: 10.1002/med.21582] [Citation(s) in RCA: 37] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2019] [Revised: 03/04/2019] [Accepted: 03/16/2019] [Indexed: 12/17/2022]
Abstract
Within the last few decades, melatonin has increasingly emerged in clinical oncology as a naturally occurring bioactive molecule with substantial anticancer properties and a pharmacological profile optimal for joining the currently available pharmacopeia. In addition, extensive experimental data shows that this chronobiotic agent exerts oncostatic effects throughout all stages of tumor growth, from initial cell transformation to mitigation of malignant progression and metastasis; additionally, melatonin alleviates the side effects and improves the welfare of radio/chemotherapy-treated patients. Thus, the support of clinicians and oncologists for the use of melatonin in both the treatment and proactive prevention of cancer is gaining strength. Because of its epidemiological importance and symptomatic debut in advanced stages of difficult clinical management, colorectal cancer (CRC) is a preferential target for testing new therapies. In this regard, the development of effective forms of clinical intervention for the improvement of CRC outcome, specifically metastatic CRC, is urgent. At the same time, the need to reduce the costs of conventional anti-CRC therapy results is also imperative. In light of this status quo, the therapeutic potential of melatonin, and the direct and indirect critical processes of CRC malignancy it modulates, have aroused much interest. To illuminate the imminent future on CRC research, we focused our attention on the molecular mechanisms underlying the multiple oncostatic actions displayed by melatonin in the onset and evolution of CRC and summarized epidemiological evidence, as well as in vitro, in vivo and clinical findings that support the broadly protective potential demonstrated by melatonin.
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Affiliation(s)
- Emilio Gil-Martín
- Department of Biochemistry, Genetics and Immunology, Biomedical Research Center (CINBIO, 'Centro Singular de Investigación de Galicia'), University of Vigo, Vigo, Spain
| | - Javier Egea
- Molecular Neuroinflammation and Neuronal Plasticity Laboratory, Research Unit, Hospital Universitario Santa Cristina, Madrid, Spain.,Servicio de Farmacología Clínica, Instituto de Investigación Sanitaria, Hospital Universitario de la Princesa, Madrid, Spain.,Departamento de Farmacología y Terapéutica, Instituto-Fundación Teófilo Hernando, Universidad Autónoma de Madrid, Madrid, Spain
| | - Russel J Reiter
- Department of Cellular and Structural Biology, UT Health Science Center, San Antonio, Texas, USA
| | - Alejandro Romero
- Department of Pharmacology and Toxicology, Faculty of Veterinary Medicine, Complutense University of Madrid, Madrid, Spain
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Cai J, Jiao X, Fang Y, Yu X, Ding X. The orphan nuclear receptor RORα is a potential endogenous protector in renal ischemia/reperfusion injury. FASEB J 2019; 33:5704-5715. [PMID: 30673513 DOI: 10.1096/fj.201802248r] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Abstract
Emerging evidence indicates that retinoid-related orphan receptor (ROR)α, a member of the ROR nuclear receptor subfamily, mediates key cellular adaptions to hypoxia and contributes to the pathophysiology of many disease states. However, the effects of RORα in renal ischemia/reperfusion (I/R) injury remain unclear. Wild-type (WT) C57 black 6 (C57BL/6) mice and RORα-deficient stagger [ROR(sg/sg)] mice and their WT littermates were used for in vivo studies. The renal I/R injury model was induced by bilateral renal pedicle clamping for 35 min. Human proximal tubule cell line cells were treated with hypoxia (1% oxygen) to establish the cell hypoxia/reoxygenation (H/R) model. We investigated the renal expression and biologic function of RORα, and we found that RORα was significantly down-regulated after renal I/R injury. ROR(sg/sg) mice displayed dramatically augmented renal dysfunction and morphologic damage compared with WT mice at 24 h post-I/R. Further study revealed that the detrimental effects of RORα deficiency were attributable to tubular epithelial cell apoptosis and, consequently, renal inflammation and oxidative stress. The proapoptotic effect of RORα deficiency was associated with aggravated mitochondrial dysfunction in renal tubular cells after I/R. However, pretreatment of C57BL/6 mice with the RORα agonist SR1078 ameliorated I/R-induced renal dysfunction and damage and elicited a concomitant decrease in tubular epithelial cell apoptosis. In summary, our study provides experimental evidence showing that RORα is a novel endogenous protector against renal I/R injury and that ROR-α activation is a promising therapeutic strategy for the prevention of acute kidney injury.-Cai, J., Jiao, X., Fang, Y., Yu, X., Ding, X. The orphan nuclear receptor RORα is a potential endogenous protector in renal ischemia/reperfusion injury.
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Affiliation(s)
- Jieru Cai
- Department of Nephrology, Zhongshan Hospital, Shanghai Medical College, Fudan University, Shanghai, China.,Shanghai Key Laboratory of Kidney and Blood Purification, Shanghai, China.,Shanghai Medical Center for Kidney Disease, Shanghai, China
| | - Xiaoyan Jiao
- Department of Nephrology, Zhongshan Hospital, Shanghai Medical College, Fudan University, Shanghai, China.,Shanghai Key Laboratory of Kidney and Blood Purification, Shanghai, China.,Shanghai Medical Center for Kidney Disease, Shanghai, China
| | - Yi Fang
- Department of Nephrology, Zhongshan Hospital, Shanghai Medical College, Fudan University, Shanghai, China.,Shanghai Key Laboratory of Kidney and Blood Purification, Shanghai, China.,Shanghai Medical Center for Kidney Disease, Shanghai, China.,Shanghai Institute of Kidney and Dialysis, Shanghai, China
| | - Xiaofang Yu
- Department of Nephrology, Zhongshan Hospital, Shanghai Medical College, Fudan University, Shanghai, China.,Shanghai Key Laboratory of Kidney and Blood Purification, Shanghai, China.,Shanghai Medical Center for Kidney Disease, Shanghai, China.,Shanghai Institute of Kidney and Dialysis, Shanghai, China
| | - Xiaoqiang Ding
- Department of Nephrology, Zhongshan Hospital, Shanghai Medical College, Fudan University, Shanghai, China.,Shanghai Key Laboratory of Kidney and Blood Purification, Shanghai, China.,Shanghai Medical Center for Kidney Disease, Shanghai, China.,Shanghai Institute of Kidney and Dialysis, Shanghai, China
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Zhong J, Liu Y. Melatonin and age-related cardiovascular diseases. Aging Med (Milton) 2018; 1:197-203. [PMID: 31942497 PMCID: PMC6880684 DOI: 10.1002/agm2.12036] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2018] [Accepted: 08/13/2018] [Indexed: 12/29/2022] Open
Abstract
The pineal gland is a neuroendocrine gland closely related to human aging. Melatonin is a kind of indole neuroendocrine hormone secreted by the pineal gland, which is essential for maintaining physiological function. Many researches found that melatonin plays a key role in anti-aging-related cardiovascular diseases. In this paper, the latest advances in the study of melatonin and aging-related cardiovascular diseases are reviewed, and their related physiological functions and mechanisms are discussed.
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Affiliation(s)
- Jiayu Zhong
- Department of GeriatricsThe Second Xiang‐Ya HospitalCentral South UniversityChangshaChina
| | - Youshuo Liu
- Department of GeriatricsThe Second Xiang‐Ya HospitalCentral South UniversityChangshaChina
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Nduhirabandi F, Maarman GJ. Melatonin in Heart Failure: A Promising Therapeutic Strategy? Molecules 2018; 23:molecules23071819. [PMID: 30037127 PMCID: PMC6099639 DOI: 10.3390/molecules23071819] [Citation(s) in RCA: 34] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2018] [Revised: 07/16/2018] [Accepted: 07/17/2018] [Indexed: 12/13/2022] Open
Abstract
Heart failure is a multifactorial clinical syndrome characterized by the inability of the heart to pump sufficient blood to the body. Despite recent advances in medical management, poor outcomes in patients with heart failure remain very high. This highlights a need for novel paradigms for effective, preventive and curative strategies. Substantial evidence supports the importance of endogenous melatonin in cardiovascular health and the benefits of melatonin supplementation in various cardiac pathologies and cardiometabolic disorders. Melatonin plays a crucial role in major pathological processes associated with heart failure including ischemic injury, oxidative stress, apoptosis, and cardiac remodeling. In this review, available evidence for the role of melatonin in heart failure is discussed. Current challenges and possible limitations of using melatonin in heart failure are also addressed. While few clinical studies have investigated the role of melatonin in the context of heart failure, current findings from experimental studies support the potential use of melatonin as preventive and adjunctive curative therapy in heart failure.
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Affiliation(s)
- Frederic Nduhirabandi
- Cardioprotection Group, Hatter Institute for Cardiovascular Research in Africa (HICRA), Department of Medicine, Faculty of Health Sciences, University of Cape Town, Cape Town 7935, South Africa.
| | - Gerald J Maarman
- Cardioprotection Group, Hatter Institute for Cardiovascular Research in Africa (HICRA), Department of Medicine, Faculty of Health Sciences, University of Cape Town, Cape Town 7935, South Africa.
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Rosano GM. Cardiovascular pharmacotherapy a growing sub-speciality across all areas of cardiology. J Cardiovasc Med (Hagerstown) 2018; 19:263-266. [DOI: 10.2459/jcm.0000000000000640] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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Crnko S, Cour M, Van Laake LW, Lecour S. Vasculature on the clock: Circadian rhythm and vascular dysfunction. Vascul Pharmacol 2018; 108:1-7. [PMID: 29778521 DOI: 10.1016/j.vph.2018.05.003] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2017] [Revised: 04/23/2018] [Accepted: 05/10/2018] [Indexed: 01/08/2023]
Abstract
The master mammalian circadian clock (i.e. central clock), located in the suprachiasmatic nucleus of the hypothalamus, orchestrates the synchronization of the daily behavioural and physiological rhythms to better adapt the organism to the external environment in an anticipatory manner. This central clock is entrained by a variety of signals, the best established being light and food. However, circadian cycles are not simply the consequences of these two cues but are generated by endogenous circadian clocks. Indeed, clock machinery is found in mainly all tissues and cell types, including cells of the vascular system such as endothelial cells, fibroblasts, smooth muscle cells and stem cells. This machinery physiologically contributes to modulate the daily vascular function, and its disturbance therefore plays a major role in the pathophysiology of vascular dysfunction. Therapies targeting the circadian rhythm may therefore be of benefit against vascular disease.
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Affiliation(s)
- Sandra Crnko
- Division Heart and Lungs and Regenerative Medicine Center, University Medical Center Utrecht, The Netherlands
| | - Martin Cour
- Hatter Institute for Cardiovascular research in Africa and Lionel Opie Preclinical Imaging Core Facility, Faculty of Health Sciences, University of Cape Town, South Africa
| | - Linda W Van Laake
- Division Heart and Lungs and Regenerative Medicine Center, University Medical Center Utrecht, The Netherlands
| | - Sandrine Lecour
- Hatter Institute for Cardiovascular research in Africa and Lionel Opie Preclinical Imaging Core Facility, Faculty of Health Sciences, University of Cape Town, South Africa.
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Jiki Z, Lecour S, Nduhirabandi F. Cardiovascular Benefits of Dietary Melatonin: A Myth or a Reality? Front Physiol 2018; 9:528. [PMID: 29867569 PMCID: PMC5967231 DOI: 10.3389/fphys.2018.00528] [Citation(s) in RCA: 51] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2018] [Accepted: 04/24/2018] [Indexed: 12/14/2022] Open
Abstract
The role of the diet as well as the impact of the dietary habits on human health and disease is well established. Apart from its sleep regulatory effect, the indoleamine melatonin is a well-established antioxidant molecule with multiple health benefits. Convincing evidence supports the presence of melatonin in plants and foods with the intake of such foods affecting circulating melatonin levels in humans. While numerous actions of both endogenous melatonin and melatonin supplementation are well described, little is known about the influence of the dietary melatonin intake on human health. In the present review, evidence for the cardiovascular health benefits of melatonin supplementation and dietary melatonin is discussed. Current knowledge on the biological significance as well as the underlying physiological mechanism of action of the dietary melatonin is also summarized. Whether dietary melatonin constitutes an alternative preventive treatment for cardiovascular disease is addressed.
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Affiliation(s)
- Zukiswa Jiki
- Cardioprotection Group, Hatter Institute for Cardiovascular Research in Africa, Department of Medicine, Faculty of Health Sciences, University of Cape Town, Cape Town, South Africa
| | - Sandrine Lecour
- Cardioprotection Group, Hatter Institute for Cardiovascular Research in Africa, Department of Medicine, Faculty of Health Sciences, University of Cape Town, Cape Town, South Africa
| | - Frederic Nduhirabandi
- Cardioprotection Group, Hatter Institute for Cardiovascular Research in Africa, Department of Medicine, Faculty of Health Sciences, University of Cape Town, Cape Town, South Africa
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Simko F, Baka T, Krajcirovicova K, Repova K, Aziriova S, Zorad S, Poglitsch M, Adamcova M, Reiter RJ, Paulis L. Effect of Melatonin on the Renin-Angiotensin-Aldosterone System in l-NAME-Induced Hypertension. Molecules 2018; 23:molecules23020265. [PMID: 29382124 PMCID: PMC6017142 DOI: 10.3390/molecules23020265] [Citation(s) in RCA: 38] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2017] [Revised: 01/15/2018] [Accepted: 01/25/2018] [Indexed: 12/24/2022] Open
Abstract
The renin-angiotensin-aldosterone system (RAAS) is a dominant player in several cardiovascular pathologies. This study investigated whether alterations induced by l-NAME, (NLG)-nitro-l-arginine methyl ester, a nitric oxide synthase inhibitor, and the protective effect of melatonin are associated with changes in the RAAS. Four groups of 3-month-old male Wistar rats (n = 10) were treated as follows for four weeks: untreated controls, rats treated with melatonin (10 mg/kg/day), rats treated with l-NAME (40 mg/kg/day), and rats treated with l-NAME + melatonin. l-NAME administration led to hypertension and left ventricular (LV) fibrosis in terms of enhancement of soluble, insoluble and total collagen concentration and content. Melatonin reduced systolic blood pressure enhancement and lowered the concentration and content of insoluble and total collagen in the LV. The serum concentration of angiotensin (Ang) 1–8 (Ang II) and its downstream metabolites were reduced in the l-NAME group and remained unaltered by melatonin. The serum aldosterone level and its ratio to Ang II (AA2-ratio) were increased in the l-NAME group without being modified by melatonin. We conclude that l-NAME-hypertension is associated with reduced level of Ang II and its downstream metabolites and increased aldosterone concentration and AA2-ratio. Melatonin exerts its protective effect in l-NAME-induced hypertension without affecting RAAS.
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Affiliation(s)
- Fedor Simko
- Institute of Pathophysiology, Faculty of Medicine, Comenius University, Sasinkova 4, 81108 Bratislava, Slovakia.
- 3rd Department of Internal Medicine, Faculty of Medicine, Comenius University, 83305 Bratislava, Slovakia.
- Institute of Experimental Endocrinology, Biomedical Research Center, Slovak Academy of Sciences, 84505 Bratislava, Slovakia.
| | - Tomas Baka
- Institute of Pathophysiology, Faculty of Medicine, Comenius University, Sasinkova 4, 81108 Bratislava, Slovakia.
| | - Kristina Krajcirovicova
- Institute of Pathophysiology, Faculty of Medicine, Comenius University, Sasinkova 4, 81108 Bratislava, Slovakia.
| | - Kristina Repova
- Institute of Pathophysiology, Faculty of Medicine, Comenius University, Sasinkova 4, 81108 Bratislava, Slovakia.
| | - Silvia Aziriova
- Institute of Pathophysiology, Faculty of Medicine, Comenius University, Sasinkova 4, 81108 Bratislava, Slovakia.
| | - Stefan Zorad
- Institute of Experimental Endocrinology, Biomedical Research Center, Slovak Academy of Sciences, 84505 Bratislava, Slovakia.
| | | | - Michaela Adamcova
- Department of Physiology, School of Medicine, Charles University, 50003 Hradec Kralove, Czech Republic.
| | - Russel J Reiter
- Department of Cellular and Structural Biology, UT Health Science Center, San Antonio, TX 78229, USA.
| | - Ludovit Paulis
- Institute of Pathophysiology, Faculty of Medicine, Comenius University, Sasinkova 4, 81108 Bratislava, Slovakia.
- Institute of Normal and Pathological Physiology, Center for Experimental Medicine, Slovak Academy of Sciences, 81371 Bratislava, Slovakia.
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Kong J, Zhang Y, Liu S, Li H, Liu S, Wang J, Qin X, Jiang X, Yang J, Zhang C, Zhang W. Melatonin attenuates angiotensin II-induced abdominal aortic aneurysm through the down-regulation of matrix metalloproteinases. Oncotarget 2017; 8:14283-14293. [PMID: 28179581 PMCID: PMC5362405 DOI: 10.18632/oncotarget.15093] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2016] [Accepted: 01/24/2017] [Indexed: 01/15/2023] Open
Abstract
Abdominal aortic aneurysm (AAA) affects more than 5% of the population in developed countries and the pharmacotherapies for AAA are limited. Here, we explored whether melatonin regulates the development of AAA. In smooth muscle cells, melatonin treatment decreases angiotensin II-induced matrix metalloproteinase 2 (MMP2) and MMP9 expression. Human antigen R (HuR) could bind with the adenylateuridylate-rich elements of MMP2 and MMP9 mRNAs 3′ untranslated region, resulting in the increased stability of MMP2 and MMP9 mRNAs. HuR is required for angiotensin II-induced MMP2 and MMP9 expression. Moreover, melatonin suppresses angiotensin II-induced HuR expression through inhibiting NF-?B signaling, leading to decreased MMP2 and MMP9 levels. Finally, melatonin attenuates the development of AAA in ApoE−/− mice infused with angiotensin II in vivo. These data support a role of HuR in the development of AAA and possible therapeutic roles for melatonin and/or HuR inhibition in AAA.
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Affiliation(s)
- Jing Kong
- The Key Laboratory of Cardiovascular Remodeling and Function Research, Chinese Ministry of Education and Chinese Ministry of Health, The State and Shandong Province Joint Key Laboratory of Translational Cardiovascular Medicine, Qilu Hospital of Shandong University, Jinan, Shandong, China
| | - Ya Zhang
- The Key Laboratory of Cardiovascular Remodeling and Function Research, Chinese Ministry of Education and Chinese Ministry of Health, The State and Shandong Province Joint Key Laboratory of Translational Cardiovascular Medicine, Qilu Hospital of Shandong University, Jinan, Shandong, China
| | - Shanshan Liu
- The Key Laboratory of Cardiovascular Remodeling and Function Research, Chinese Ministry of Education and Chinese Ministry of Health, The State and Shandong Province Joint Key Laboratory of Translational Cardiovascular Medicine, Qilu Hospital of Shandong University, Jinan, Shandong, China
| | - Hongxuan Li
- The Key Laboratory of Cardiovascular Remodeling and Function Research, Chinese Ministry of Education and Chinese Ministry of Health, The State and Shandong Province Joint Key Laboratory of Translational Cardiovascular Medicine, Qilu Hospital of Shandong University, Jinan, Shandong, China
| | - Shangming Liu
- Key Laboratory of the Ministry of Education for Experimental Teratology, Department of Histology and Embryology, Shandong University School of Medicine, Jinan, China
| | - Jingjing Wang
- Institute of Pathology and Pathophysiology, Shandong University School of Medicine, Jinan, China
| | - Xiaoteng Qin
- The Key Laboratory of Cardiovascular Remodeling and Function Research, Chinese Ministry of Education and Chinese Ministry of Health, The State and Shandong Province Joint Key Laboratory of Translational Cardiovascular Medicine, Qilu Hospital of Shandong University, Jinan, Shandong, China
| | - Xiuxin Jiang
- Department of General Surgery, Virtual Laboratory, Qilu Hospital of Shandong University, Jinan, China
| | - Jianmin Yang
- The Key Laboratory of Cardiovascular Remodeling and Function Research, Chinese Ministry of Education and Chinese Ministry of Health, The State and Shandong Province Joint Key Laboratory of Translational Cardiovascular Medicine, Qilu Hospital of Shandong University, Jinan, Shandong, China
| | - Cheng Zhang
- The Key Laboratory of Cardiovascular Remodeling and Function Research, Chinese Ministry of Education and Chinese Ministry of Health, The State and Shandong Province Joint Key Laboratory of Translational Cardiovascular Medicine, Qilu Hospital of Shandong University, Jinan, Shandong, China
| | - Wencheng Zhang
- The Key Laboratory of Cardiovascular Remodeling and Function Research, Chinese Ministry of Education and Chinese Ministry of Health, The State and Shandong Province Joint Key Laboratory of Translational Cardiovascular Medicine, Qilu Hospital of Shandong University, Jinan, Shandong, China
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Lo Sardo F, Muti P, Blandino G, Strano S. Melatonin and Hippo Pathway: Is There Existing Cross-Talk? Int J Mol Sci 2017; 18:ijms18091913. [PMID: 28878191 PMCID: PMC5618562 DOI: 10.3390/ijms18091913] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2017] [Revised: 08/30/2017] [Accepted: 09/01/2017] [Indexed: 12/16/2022] Open
Abstract
Melatonin is an indolic hormone that regulates a plethora of functions ranging from the regulation of circadian rhythms and antioxidant properties to the induction and maintenance of tumor suppressor pathways. It binds to specific receptors as well as to some cytosolic proteins, leading to several cellular signaling cascades. Recently, the involvement of melatonin in cancer insurgence and progression has clearly been demonstrated. In this review, we will first describe the structure and functions of melatonin and its receptors, and then discuss both molecular and epidemiological evidence on melatonin anticancer effects. Finally, we will shed light on potential cross-talk between melatonin signaling and the Hippo signaling pathway, along with the possible implications for cancer therapy.
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Affiliation(s)
- Federica Lo Sardo
- Oncogenomic and Epigenetic Unit, Molecular Chemoprevention Group, Department of Research, Diagnosis and Innovative Technologies, Translational Research Area, Regina Elena National Cancer Institute, via Elio Chianesi 53, 00144 Rome, Italy.
| | - Paola Muti
- Department of Oncology, Juravinski Cancer Center, McMaster University, Hamilton, ON L8S 4L8, Canada.
| | - Giovanni Blandino
- Oncogenomic and Epigenetic Unit, Molecular Chemoprevention Group, Department of Research, Diagnosis and Innovative Technologies, Translational Research Area, Regina Elena National Cancer Institute, via Elio Chianesi 53, 00144 Rome, Italy.
| | - Sabrina Strano
- Oncogenomic and Epigenetic Unit, Molecular Chemoprevention Group, Department of Research, Diagnosis and Innovative Technologies, Translational Research Area, Regina Elena National Cancer Institute, via Elio Chianesi 53, 00144 Rome, Italy.
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Kokune-Takahashi A, Ayaki M, Tsubota K, Negishi K. Effects of Cataract Opacity and Surgery on Sleep Quality. Rejuvenation Res 2017; 21:53-60. [PMID: 28728538 DOI: 10.1089/rej.2016.1907] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
Abstract
This study aimed to identify the type of cataract opacity associated with subjective sleep quality for cataract patients. A total of 180 consecutive patients (average age 74.2 years) underwent cataract surgery with implantation of an ultraviolet-blocking or blue light-blocking intraocular lens. The participants' subjective sleep quality was evaluated using the Pittsburgh sleep quality index (PSQI) before and at 2 months after surgery. Patients were divided into two groups for analysis: normal sleepers (preoperative PSQI ≤5) and poor sleepers (preoperative PSQI ≥6). The preoperative and postoperative PSQI scores were 2.8 ± 1.5 and 3.2 ± 2.0, respectively, for normal sleepers (n = 99), and 8.5 ± 2.9 and 7.4 ± 3.3, respectively, for poor sleepers (n = 81). The improvement in PSQI was significant in poor sleepers (p < 0.0001, Wilcoxon's test) with measured values of 0.22 ± 0.96 hours extension in sleep duration and 0.16 ± 0.62 hours shortening in sleep latency. Patients with posterior subcapsular cataract (PSC) and nuclear opacity showed the greatest improvement in PSQI score, with regression analysis identifying PSC as having a significant effect on improvement in PSQI. Significant correlations were found between the subjective sleep and cataract opacity in cataract patients. Ophthalmic personnel should therefore be aware that cataract patients with PSC have a greater potential for disability and predictable benefits from surgery in vision and subjective sleep.
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Affiliation(s)
| | - Masahiko Ayaki
- Department of Ophthalmology, Keio University School of Medicine , Tokyo, Japan
| | - Kazuo Tsubota
- Department of Ophthalmology, Keio University School of Medicine , Tokyo, Japan
| | - Kazuno Negishi
- Department of Ophthalmology, Keio University School of Medicine , Tokyo, Japan
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Dominguez-Rodriguez A, Abreu-Gonzalez P, de la Torre-Hernandez JM, Consuegra-Sanchez L, Piccolo R, Gonzalez-Gonzalez J, Garcia-Camarero T, del Mar Garcia-Saiz M, Aldea-Perona A, Reiter RJ, Caballero-Estevez N, de la Rosa A, Virgos-Aller T, Nazco-Casariego J, Laynez-Cerdeña I, Bosa-Ojeda F, Sanchez-Grande A, Yanes-Bowden G, Vargas-Torres M, Lara-Padrón A, Perez-Jorge P, Diaz-Flores L, Lopez J, Lacalzada-Almeida J, Duque A, Bethencourt M, Izquierdo M, Juarez-Prera R, Blanco-Palacios G, Barragan-Acea A, Ferrer-Hita J, Marí-Lopez B, Padilla M, Gonzalez E, Martin-Cabeza M, Mendez-Vargas C, Barrios P, Belleyo-Belkasem C, Leiva M, Betancor I, Miranda J, Giménez Poderós T, Soria-Arcos F, Martinez L. Usefulness of Early Treatment With Melatonin to Reduce Infarct Size in Patients With ST-Segment Elevation Myocardial Infarction Receiving Percutaneous Coronary Intervention (From the Melatonin Adjunct in the Acute Myocardial Infarction Treated With Angioplasty Trial). Am J Cardiol 2017. [PMID: 28645475 DOI: 10.1016/j.amjcard.2017.05.018] [Citation(s) in RCA: 54] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Abstract
Melatonin, an endogenously produced hormone, might potentially limit the ischemia reperfusion injury and improve the efficacy of mechanical reperfusion with primary percutaneous coronary intervention (pPCI) in ST-segment elevation myocardial infarction (STEMI). This study was aimed to evaluate whether the treatment effect of melatonin therapy in patients with STEMI is influenced by the time to administration. We performed a post hoc analysis of the Melatonin Adjunct in the Acute Myocardial Infarction Treated With Angioplasty trial (NCT00640094), which randomized STEMI patients to melatonin (intravenous and intracoronary bolus) or placebo during pPCI. Randomized patients were divided into tertiles according to symptoms onset to balloon time: first tertile (136 ± 23 minutes), second tertile (196 ± 19 minutes), and third tertile (249 ± 41 minutes). Magnetic resonance imaging was performed within 1 week after pPCI. A total of 146 patients presenting with STEMI within 360 minutes of chest pain onset were randomly allocated to intravenous and intracoronary melatonin or placebo during pPCI. In the first tertile, the infarct size was significantly smaller in the melatonin-treated subjects compared with placebo (14.6 ± 14.2 vs 24.9 ± 9.0%; p = 0.003). Contrariwise, treatment with melatonin was associated with a larger infarct size in the group of patients included in the third tertile (20.5 ± 8.7% vs 11.2 ± 5.2%; p = 0.001), resulting in a significant interaction (p = 0.001). In conclusion, the administration of melatonin in patients with STEMI who presented early after symptom onset was associated with a significant reduction in the infarct size after pPCI.
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50
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Wang SG, Tsao DD, Vanderpool KG, Yasumura T, Rash JE, Nagy JI. Connexin36 localization to pinealocytes in the pineal gland of mouse and rat. Eur J Neurosci 2017; 45:1594-1605. [PMID: 28474748 PMCID: PMC5507615 DOI: 10.1111/ejn.13602] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2017] [Revised: 04/27/2017] [Accepted: 04/28/2017] [Indexed: 01/07/2023]
Abstract
Several cell types in the pineal gland are known to establish intercellular gap junctions, but the connexin constituents of those junctions have not been fully characterized. Specifically, the expression of connexin36 (Cx36) protein and mRNA has been examined in the pineal, but the identity of cells that produce Cx36 and that form Cx36-containing gap junctions has not been determined. We used immunofluorescence and freeze fracture replica immunogold labelling (FRIL) of Cx36 to investigate the cellular and subcellular localization of Cx36 in the pineal gland of adult mouse and rat. Immunofluorescence labelling of Cx36 was visualized exclusively as puncta or short immunopositive strands that were distributed throughout the pineal, and which were absent in pineal sections from Cx36 null mice. By double immunofluorescence labelling, Cx36 was localized to tryptophan hydroxylase-positive and 5-hydroxytryptamine-positive pinealocyte cell bodies and their large initial processes, including at intersections of those processes and at sites displaying a confluence of processes. Labelling for the cell junction marker zonula occludens-1 (ZO-1) either overlapped or was closely associated with labelling for Cx36. Pinealocytes thus form Cx36-containing gap junctions that also incorporate the scaffolding protein ZO-1. FRIL revealed labelling of Cx36 at ultrastructurally defined gap junctions between pinealocytes, most of which was at gap junctions having reticular, ribbon or string configurations. The results suggest that the endocrine functions of pinealocytes and their secretion of melatonin is supported by their intercellular communication via Cx36-containing gap junctions, which may now be tested by the use of Cx36 null mice.
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Affiliation(s)
- S G Wang
- Department of Physiology, Faculty of Medicine, University of Manitoba, 745 Bannatyne Ave, Winnipeg, MB, R3E 0J9, Canada
| | - D D Tsao
- Department of Physiology, Faculty of Medicine, University of Manitoba, 745 Bannatyne Ave, Winnipeg, MB, R3E 0J9, Canada
| | - K G Vanderpool
- Department of Biomedical Sciences, Colorado State University, Fort Collins, CO, USA
| | - T Yasumura
- Department of Biomedical Sciences, Colorado State University, Fort Collins, CO, USA
| | - J E Rash
- Department of Biomedical Sciences, Colorado State University, Fort Collins, CO, USA
| | - J I Nagy
- Department of Physiology, Faculty of Medicine, University of Manitoba, 745 Bannatyne Ave, Winnipeg, MB, R3E 0J9, Canada
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