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Biochem Biophys Res Commun. 2015 Jul 10;462(4):402-8. doi: 10.1016/j.bbrc.2015.04.145. Epub 2015 May 12.

The anti-hypertensive drug reserpine induces neuronal cell death through inhibition of autophagic flux.

Author information

1
Division of Biological Science and Technology, Yonsei University, Wonju 220-100, Republic of Korea.
2
Department of Pharmacology, Mitochondria Hub Regulation Center (MHRC), Dong-A University College of Medicine, Busan 602-714, Republic of Korea.
3
Korea Bioactive Natural Material Bank, College of Pharmacy, Seoul National University, Seoul 151-742, Republic of Korea.
4
Division of Biological Science and Technology, Yonsei University, Wonju 220-100, Republic of Korea. Electronic address: junsoo@yonsei.ac.kr.

Abstract

Reserpine is a well-known medicine for the treatment of hypertension and schizophrenia, but its administration can induce Parkinson's disease (PD)-like symptoms in humans and animals. Reserpine inhibits the vesicular transporter of monoamines and depletes the brain of monoamines such as dopamine. However, the cellular function of reserpine is not fully understood. In this report, we present one possible mechanism by which reserpine may contribute to PD-like symptoms. Reserpine treatment induced the formation of enlarged autophagosomes by inhibiting the autophagic flux and led to accumulation of p62, an autophagy adapter molecule. In particular, reserpine treatment increased the level of α-synuclein protein and led to accumulation of α-synuclein in autophagosomes. Treatment with rapamycin enhanced the effect of reserpine by further increasing the level of α-synuclein and neuronal cell death. Drosophila raised on media containing reserpine showed loss of dopaminergic neurons. Furthermore, cotreatment with reserpine and rapamycin aggravated the loss of dopaminergic neurons. Our results suggest that reserpine contributes to the loss of dopaminergic neurons by interfering with autophagic flux.

KEYWORDS:

Autophagic flux; Autophagy; Parkinson's disease; Reserpine; α-Synuclein

PMID:
25976674
DOI:
10.1016/j.bbrc.2015.04.145
[Indexed for MEDLINE]

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