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Circadian Factors in Stroke: A Clinician ’s Perspective
AbstractStroke remains one of the leading causes of mortality and long-term and permanent disability worldwide despite technological innovations and developments in pharmacotherapy. In the last few decades, the growing data have evidenced the role of the circadian system in brain vulnerability to damage, the development and evolution of stroke, and short-term and long-term recovery. On the other hand, the stroke itself can affect the circadian system via direct injury of specific brain structures involved in circadian regulation (i.e., hypothalamus, retinohypothalamic tracts, etc.) and impairment of endogenous regulatory m...
Source: Cardiology and Therapy - May 16, 2023 Category: Cardiology Source Type: research

Nose to brain delivery of melatonin lipidic nanocapsules as a promising post-ischemic neuroprotective therapeutic modality
Drug Deliv. 2022 Dec;29(1):2469-2480. doi: 10.1080/10717544.2022.2104405.ABSTRACTIschemic stroke accounts for about 87% of all strokes, causing long-term disability in adults, and is the second leading cause of death worldwide. In search of new therapeutic modalities, the use of neuroprotective agents loaded in nanocarriers to be delivered by noninvasive means (i.e. via intranasal route) became a popular approach. In the current study, melatonin (MEL) was loaded in lipidic nanocapsules (LNCs) prepared using the phase inversion method, and characterized in terms of size, polydispersity, zeta potential, in vitro drug release...
Source: Drug Delivery - July 27, 2022 Category: Drugs & Pharmacology Authors: Eman A Bseiso Sarah A AbdEl-Aal Maha Nasr Omaima A Sammour Nabaweya A Abd El Gawad Source Type: research

Agomelatine Exerts an Anti-inflammatory Effect by Inhibiting Microglial Activation Through TLR4/NLRP3 Pathway in pMCAO Rats
In this study, we aimed to investigate the anti-inflammatory effect of agomelatine in a permanent middle cerebral artery occlusion (pMCAO) model. Forty-eight male Wistar rats were randomly divided into four groups: sham, pMCAO + vehicle, pMCAO + agomelatine (40 mg/kg, i.p.), and pMCAO + melatonin (10 mg/kg, i.p.) groups. On day 1 after permanent cerebral ischemia, the animals were sacrificed, and brain tissues were collected for western blot analysis, and immunohistochemistry. Agomelatine treatment ameliorated inflammatory responses by decreasing the protein levels of trigger Toll-like receptor (TLR4)/nuclear factor kappa-...
Source: Cell Research - November 29, 2021 Category: Cytology Authors: Wijitra Chumboatong Satchakorn Khamchai Chainarong Tocharus Piyarat Govitrapong Jiraporn Tocharus Source Type: research

Prevention of depression in adults with long-term physical conditions
CONCLUSIONS: Based on evidence of very low certainty, our results may indicate the benefit of pharmacological interventions, during or directly after preventive treatment. Few trials examined short-term outcomes up to six months, nor the follow-up effects at six to 12 months, with studies suffering from great numbers of drop-outs and inconclusive results. Generalisation of results is limited as study populations and treatment regimes were very heterogeneous. Based on the results of this review, we conclude that for adults with long-term physical conditions, there is only very uncertain evidence regarding the implementation...
Source: Cochrane Database of Systematic Reviews - March 5, 2021 Category: General Medicine Authors: Hanna Kampling Harald Baumeister J ürgen Bengel Oskar Mittag Source Type: research

Agomelatine protects against permanent cerebral ischaemia via the Nrf2-HO-1 pathway.
In this study, we focused on the effect of agomelatine on permanent cerebral ischaemia in a rat model. Male Wistar rats were randomly divided into the following four groups (n = 6/group): sham operating group, permanent ischaemic model group, permanent ischaemic model plus agomelatine (40 mg/kg, i.p) group and permanent ischaemic model plus melatonin (10 mg/kg, i.p) group. Twenty-four h after ischaemic onset, we investigated the neurological deficits and infarct volume using neurological deficit scores, 2,3,5-triphenyltetrazolium chloride (TTC) and transmission electron microscopy (Kochanski et al.). Moreover, we a...
Source: European Journal of Pharmacology - February 17, 2020 Category: Drugs & Pharmacology Authors: Chumboatong W, Khamchai S, Tocharus C, Govitrapong P, Tocharus J Tags: Eur J Pharmacol Source Type: research

Melatonin Regulates Neuroinflammation Ischemic Stroke Damage through Interactions with Microglia in Reperfusion phase.
In this study, we initially aimed to evaluate the therapeutic efficacy of melatonin intra-arterially and to clarify the underlying mechanisms. After that by using an in vitro approach, we evaluated the protective effects of melatonin on microglial cells following the hypoxia condition. Our results proved that a single dose of melatonin at the beginning of reperfusion phase improved structural and behavioral outcomes. Melatonin increased NeuN and decreased GFAP, Iba1 and active caspase-3 at protein level. Furthermore, melatonin elevated BDNF, MAP2, HSPA1A and reduced VEGF at mRNA level. We also showed that melatonin recepto...
Source: Brain Research - August 20, 2019 Category: Neurology Authors: Azedi F, Mehrpour M, Talebi S, Zendedel A, Kazemnejad S, Mousavizadeh K, Beyer C, Hassan Zarnani A, Taghi Joghataei M Tags: Brain Res Source Type: research

Role of TREK-1 in Health and Disease, Focus on the Central Nervous System
Conclusion and Perspectives Since their cloning 20 years ago, the physiological importance of TREK-1 channels has continued to grow (Figure 3). Today, TREK-1 channels have been shown to be important and their presence is essential in a number of physiopathological processes. Their involvement in these different processes demonstrate the necessity to design pharmacological modulators, activators or inhibitors, of these channels to correct any TREK-1-related dysfunctions. Despites a number of studies and many molecule screenings, only few putative new drugs were identified. The activators belonging to the ML and BL series ...
Source: Frontiers in Pharmacology - April 10, 2019 Category: Drugs & Pharmacology Source Type: research

Co-Administration of Progesterone and Melatonin Attenuates Ischemia-Induced Hippocampal Damage in Rats
AbstractStroke is the second leading reason for death worldwide and is one of the fundamental causes of long-term disabilities. The aim of this investigation was to assess the impact of combined administration progesterone (PROG) and melatonin (MEL) on stroke complications. Male Wistar rats (9 –10 weeks) weighing 250–300 g were used as a part of this examination. They were randomly separated into eight groups (nine rats for every group). Common carotid arteries on the two sides clamped (BCCAO model) with non-traumatic clips for 20 min. At that point, the rats were treated with 8 m g/kg PROG, 10 mg/kg MEL, and vehi...
Source: Journal of Molecular Neuroscience - October 1, 2018 Category: Neuroscience Source Type: research

Associations between Greenness, Impervious Surface Area, and Nighttime Lights on Biomarkers of Vascular Aging in Chennai, India
Conclusion: Greenness, ISA, and NTL were associated with increased SBP, DBP, and cPP, and with reduced FMD, suggesting a possible additional EVA pathway for the relationship between urbanization and increased CVD prevalence in urban India. https://doi.org/10.1289/EHP541 Received: 20 May 2016 Revised: 03 January 2017 Accepted: 23 January 2017 Published: 02 August 2017 Address correspondence to K.J. Lane, Yale School of Forestry and Environmental Studies, 195 Prospect Street, New Haven, CT 06511 USA. Telephone: (781) 696-4537; Email: kevin.lane@yale.edu Supplemental Material is available online (https://doi.org/10.1289...
Source: EHP Research - August 2, 2017 Category: Environmental Health Authors: Daniil Lyalko Tags: Research Source Type: research

Neuroprotective Mechanisms of Melatonin in Hemorrhagic Stroke.
Abstract Hemorrhagic stroke which consists of subarachnoid hemorrhage and intracerebral hemorrhage is a dominant cause of death and disability worldwide. Although great efforts have been made, the physiological mechanisms of these diseases are not fully understood and effective pharmacological interventions are still lacking. Melatonin (N-acetyl-5-methoxytryptamine), a neurohormone produced by the pineal gland, is a broad-spectrum antioxidant and potent free radical scavenger. More importantly, there is extensive evidence demonstrating that melatonin confers neuroprotective effects in experimental models of hemorr...
Source: Cellular and Molecular Neurobiology - January 27, 2017 Category: Cytology Authors: Wu HJ, Wu C, Niu HJ, Wang K, Mo LJ, Shao AW, Dixon BJ, Zhang JM, Yang SX, Wang YR Tags: Cell Mol Neurobiol Source Type: research

Melatonin and Ischemic Stroke: Mechanistic Roles and Action.
Authors: Andrabi SS, Parvez S, Tabassum H Abstract Stroke is one of the most devastating neurological disabilities and brain's vulnerability towards it proves to be fatal and socio-economic loss of millions of people worldwide. Ischemic stroke remains at the center stage of it, because of its prevalence amongst the several other types attacking the brain. The various cascades of events that have been associated with stroke involve oxidative stress, excitotoxicity, mitochondrial dysfunction, upregulation of Ca(2+) level, and so forth. Melatonin is a neurohormone secreted by pineal and extra pineal tissues responsibl...
Source: Advances in Pharmacological Sciences - October 6, 2015 Category: Drugs & Pharmacology Tags: Adv Pharmacol Sci Source Type: research

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