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Pharmacological Targeting of the Mitochondrial Permeability Transition Pore for Cardioprotection

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Abstract

The mitochondrial permeability transition pore (mPTP) has been shown to play an important role in different pathologies, with particular relevance in cardiovascular diseases. Although different compounds and strategies have been shown to have cardioprotection in experimental models for ischaemia reperfusion injury, so far none of them was effective when translated to clinical practice. The poor clinical success is based in part on the fact that the molecular identity of the pore and its regulators is not completely understood. Additionally, most of the molecules tested have low bioavailability, with only a reduced percentage reaching mitochondria, preventing mPTP opening. The mitochondrial-targeting strategies should be a promising solution to increase the selectivity of compounds to the mPTP, reducing also their potential side effects. In this chapter we perform an integrative description of the effects of different mPTP inhibitors, that directly target one of the mPTP components, as well as developed strategies for desensitizing or inhibition of mPTP through indirect pathways. Moreover, strategies that inhibit mPTP opening by modulating mitochondrial calcium uptake, reactive oxygen species, and intracellular pH, as well as protocols of ischaemia and temperature preconditioning are also included. As a new perspective, we emphasize what should be clarified in the future in order to find potential cardioprotective strategies that may be successfully translated to clinical practice.

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Abbreviations

6-MeAla-CsA:

NMe-Ala-6-cyclosporin A

β-AR:

β-Adrenergic receptors

ΔΨm:

Mitochondria membrane potential

Akt:

Phosphoinositide-dependent serine/threoninekinase

AMI:

Acute myocardial infarction

AMPK:

AMP-activated protein kinase

ANT:

Adenine nucleotide translocator

BAPTA-AM:

1,2-bis(2-Aminophenoxy)ethane-N,N,N9,N9-tetraacetic acid-acetoxymethyl ester

Bax:

Bcl-2 associated X protein

BKA:

Bongkrekic acid

BNP:

B-Type natriuretic peptide

CAGB:

Coronary artery bypass grafting

CaMKII:

Calcium/calmodulin-dependent protein Kinase II

CDZ:

4′-Chlorodiazepam

cGMP:

Cyclic guanosine monophosphate

CsA:

Cyclosporin A

CsA-NP:

Nanoparticles poly-lactic/glycolic acid incorporated with CsA

CVDs:

Cardiovascular diseases

Cyp-D:

Cyclophilin D

Debio-025:

D-3-Methyl-Ala-4-ethyl-Val-CsA

DKO:

Double knockout

DMA:

Dimethylamiloride

DPAG:

Dipyruvyl-acetyl-glycerol

Drp-1:

Dynamin-related protein-1

EP:

Ethyl pyruvate

Epac:

Exchange protein activated by cAMP

EPO:

Erythropoietin

Erk:

Extracellular signal-regulated kinase

ETC:

Electron transport chain

GS:

Donor S-nitrosoglutathione

GSK3-β:

Glycogen synthase kinase 3 β

hANP:

Human atrial natriuretic peptide

HK-II:

Hexokinase-II

I/R:

Ischaemia/reperfusion

IMM:

Inner mitochondrial membrane

IP:

Ischaemic preconditioning

KO:

Knockout

LIF:

Leukaemia inhibitory factor

MCU:

Mitochondrial calcium uniporter

Mfn-1 and 2:

Mitochondrial fusion-1 and 2

MitoQ:

Mitoquinone

mKATP :

Mitochondrial ATP-sensitive potassium channels

mNHE:

Mitochondrial sodium/proton exchangers

mPTP:

Mitochondrial permeability transition

mtCK:

Mitochondrial creatine kinase

mtCSA:

Mitochondrial-targeted CsA

NADPH:

Nicotinamide adenine dinucleotide phosphate

NEM:

N-Ethylmaleimide

NHE:

Sodium/proton exchangers

NIM811:

N-Methyl-4-isoleucine-CsA

NO:

Nitric oxide

OMM:

Outer mitochondria membrane

OPA1:

Optic atrophy 1

OSCP:

Oligomycin sensitivity-conferring protein

PAO:

Phenylarsine oxide

PCI:

Percutaneous coronary intervention

pHi:

Internal pH

Pi3k:

Phosphoinositide 3-kinase

PiC:

Phosphate carrier protein

PKA:

Protein kinase A

PKC:

Protein kinase C

PKG:

protein kinase G

PTMs:

Post-translational modifications

Pyr2:

Proline-rich tyrosine kinase 2

RI:

Reperfusion injury

RIPC:

Remote ischaemic preconditioning

RISK:

Reperfusion injury salvage kinase

ROS:

Reactive oxygen species

RuR:

Ruthenium red

SfA:

Sanglifehrin A

sh-RNA:

Short-hairpin RNA

SIRT3:

Sirtuin 3

SkQs:

Plastoquinone

SNO:

S-Nitrosylation

SS:

Szeto-Schiller

STAT3:

Signal transducer and activator of transcription 3

STEMI:

ST segment elevation myocardial infarction

TP:

Temperature preconditioning

TPP:

Triphenylphosphonium (TPP)

TRO40303:

3,5-Seco-4-nor-cholestan-5-one oxime-3-ol

TSPO:

Translocator protein of 18 kDa

VDAC:

Voltage-dependent anion channel

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Acknowledgments

Work in the authors laboratory is funded by FEDER funds through the Operational Programme Competitiveness Factors -COMPETE and national funds by FCT—Foundation for Science and Technology under research grants PTDC/DTP-FTO/2433/2014, POCI-01-0145-FEDER-016659, and POCI-01-0145-FEDER-007440. Filomena Silva is recipient of a Post-Doctoral Fellowship from the Foundation for Science and Technology, SFRH/BPD/122648/2016.

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Correspondence to Gonçalo C. Pereira .

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Silva, F.S.G., Costa, C.F., Marques, R.J., Oliveira, P.J., Pereira, G.C. (2018). Pharmacological Targeting of the Mitochondrial Permeability Transition Pore for Cardioprotection. In: Oliveira, P. (eds) Mitochondrial Biology and Experimental Therapeutics. Springer, Cham. https://doi.org/10.1007/978-3-319-73344-9_20

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