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Mechanisms associated with the dysregulation of mitochondrial function due to lead exposure and possible implications on the development of Alzheimer’s disease

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Abstract

Lead (Pb) is a multimedia contaminant with various pathophysiological consequences, including cognitive decline and neural abnormalities. Recent findings have reported an association of Pb toxicity with Alzheimer’s disease (AD). Studies have revealed that mitochondrial dysfunction is a pathological characteristic of AD. According to toxicology reports, Pb promotes mitochondrial oxidative stress by lowering complex III activity in the electron transport chain, boosting reactive oxygen species formation, and reducing the cell’s antioxidant defence system. Here, we review recent advances in the role of mitochondria in Pb-induced AD pathology, as well as the mechanisms associated with the mitochondrial dysfunction, such as the depolarisation of the mitochondrial membrane potential, mitochondrial permeability transition pore opening; mitochondrial biogenesis, bioenergetics and mitochondrial dynamics alterations; and mitophagy and apoptosis. We also discuss possible therapeutic options for mitochondrial-targeted neurodegenerative disease (AD).

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Abbreviations

Pb:

Lead

AD:

Alzheimer’s disease

NFT:

Neurofibrillary tangles

Aβ:

Amyloid-beta

APP:

Amyloid precursor protein

BACE1:

Beta-secretase

NMDA:

N-methyl d-aspartic acid

ROS:

Reactive oxygen species

ETC:

Electron transport chain

TCA:

Tricarboxylic acid cycle

MMP:

Mitochondrial membrane potential

MPTP:

Mitochondrial permeability transition pore

TOM:

Translocase of outer mitochondrial membrane

VDAC:

Voltage-dependent anion channel

Mt DNA:

Mitochondrial DNA

PGC-1α:

Peroxisome proliferator-activated receptor gamma coactivator 1-alpha

NRF:

Nuclear respiratory factors

TFAM:

Mitochondrial transcription factor A

SIRT3:

Sirtuin3

OPA1:

Optic atrophy factor 1

Mfn:

Mitofusin

Drp1:

Dynamin related protein-1

Fis1:

Fission protein 1

Mff:

Mitochondrial fission factor

MIRO:

Mitochondrial Rho small GTPase

KLC:

Kinesin light chain

DIC:

Dynein intermediate chain

PINK1:

PTEN-induced putative kinase protein1

CypD:

Cyclophilin D

ANT:

Adenine nucleotide translocase

AIF:

Apoptosis-inducing factor

SOD:

Superoxide dismutase

GSH-Px:

Glutathione peroxidase

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Acknowledgements

We thank the Indian Council of Medical Research (ICMR) for providing funds to carryout research and the University grants commission (UGC), Govt. of India for the award of the fellowship.

Funding

This work has been supported by the Grant 58/57/2012-BMS funded by Indian Council of Medical Research (ICMR).

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Correspondence to Suresh Challa.

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Bandaru, L.J.M., Ayyalasomayajula, N., Murumulla, L. et al. Mechanisms associated with the dysregulation of mitochondrial function due to lead exposure and possible implications on the development of Alzheimer’s disease. Biometals 35, 1–25 (2022). https://doi.org/10.1007/s10534-021-00360-7

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  • DOI: https://doi.org/10.1007/s10534-021-00360-7

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