Rashmi Jha^1,2, Priyanka Mishra¹, Ranjeet Kumar¹, Abbas Ali Mahdi², Shivani Pandey², Najma Zaheer Baquer¹, Sudha Mahajan Cowsik^1*

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¹ School of Life Sciences, Jawaharlal Nehru University, New Delhi, India.
² Department of Biochemistry, King George’s Medical University, Lucknow, India.
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Abstract: The Na+ - K+ ATPase is an enzyme responsible for the active transport of Na+ and K+ in most eukaryotic cells. The aim of the present study was to determine the effect of Tachykinin neuropeptide, Neurokinin B (NKB) and Amyloid beta fragment Aβ (25 - 35) on 17β estradiol (E2) treated aging female rat brain synaptosomes of different age groups, by assaying Na+ - K+ ATPase enzyme activity. An in vitro incubation of isolated synaptosomes with Aβ (25 - 35) showed toxic effects while NKB showed stimulating effect on the Na+ - K+ ATPase activity, and the combined NKB + Aβ (25 - 35) incubations showed a partial effect as compared to the Aβ (25 - 35) alone. To understand whether E2 affects the expression of Na+ - K+ ATPase molecules, we examined the expression of Na+ - K+ ATPase subunit α1 and β2 in E2 treated aging female rat brain synaptosomes. The enzyme was quantified by SDS PAGE in control and E2 treated rat brain. We observed that the expression of α1 and β2 Na+ - K+ ATPase molecules increased and reversed to a normal level in E2 treated synaptosomes. These results confirmed that E2 increased turnover of Na+ - K+ ATPase molecules in aging rat brain. The present findings also suggest a possible role of NKB with E2 in the age related changes in the brain.

Keywords: Na+ - K+ ATPase, Aging, Neurokinin B, Amyloid Beta (25 - 35), Estradiol

Cite this paper: Jha, R. , Mishra, P. , Kumar, R. , Mahdi, A. , Pandey, S. , Baquer, N. and Cowsik, S. (2015) Therapeutic Potential of 17β Estradiol with Tachykinin Neuropeptide NKB and Aβ(25 - 35) on Na⁺ - K⁺ ATPase Activity in Aging Female Rat Brain. Advances in Aging Research, 4, 19-27. doi: 10.4236/aar.2015.42003.

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