Abstract
17β-estradiol is known to exert neurotrophic and neuroprotective effects through classical estrogen receptors [ERs], ERα and ERβ, on a variety of cell types either by genomic or non-genomic actions. The actions of estradiol on glial cells are important to maintain metabolic functions of the nervous system. Astrocytes are considered to be active participants in brain activity because of their ability to release growth factors, including neurotrophins. Present in vitro studies show that 17β-estradiol modulates NGF and BDNF expression in time-dependent manner and ERK acts as secondary messenger for estradiol’s action. 17β-estradiol is involved in survival of cortical astrocytes. In conclusion, this study indicates vital role of ERβ mediated ERK signalling for regulation of NGF and BDNF expression along with cell viability of cortical astrocytes which further confirms the role of ERs, particularly ERβ in glial cells’ functions and viability.
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Abbreviations
- E2:
-
17β-estradiol
- ERs:
-
Estradiol Receptors
- ERα:
-
Estradiol Receptor alpha
- ERβ:
-
Estradiol Receptor beta
- NGF:
-
Nerve growth factor
- BDNF:
-
Brain derived neurotrophic factor
- NT3:
-
Neurotrophins 3
- NT4/5:
-
Neurotrophins 4/5
- ERK:
-
Extracellular regulated kinase
- MEK:
-
Mitogen activated protein kinase
- GFAP:
-
Glial fibrillary acidic protein
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Acknowledgments
The authors are highly thankful to the Animal House Facility, Department of Biochemistry, The Maharaja Sayajirao University of Baroda, Vadodara. Authors are also very thankful to DBT-ILSPARE Programme, for the Confocal microscope facility at Dr. Vikram Sarabhai Science Block, Faculty of Science, The Maharaja Sayajirao University of Baroda, Vadodara.
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All animal experiments were in compliance with the ethical committee approved by the Institutional Animal Ethical Committee, The Maharaja Sayajirao University of Baroda; ZD/02/2013, 2014, 2015.
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Langhnoja, J.M., Buch, L.K. & Pillai, P.P. 17β-estradiol modulates NGF and BDNF expression through ERβ mediated ERK signaling in cortical astrocytes. Biologia 73, 907–915 (2018). https://doi.org/10.2478/s11756-018-0099-1
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DOI: https://doi.org/10.2478/s11756-018-0099-1