SS-31 cuam tshuam nrog Cardiolipin li cas?

SS-31 (elamipretide) yog ib qho ntawm feem ntau kawm mitochondria- phiaj peptides hauv kev sim biology. Tsis zoo li classic dawb-scavengers radical, nws cov haujlwm yog npaj kom tshwm sim feem ntau los ntawm cov qauv kev sib cuam tshuam nrog lub puab mitochondrial membrane thiab cardiolipin, nrog rau direct reactive oxygen hom (ROS)-scavenging zog uas kuj tau soj ntsuam.

Kab lus no piav qhia txog cov txheej txheem tsim tawm ntawmTSI-31, nws kev cuam tshuam nrog cardiolipin, cuam tshuam rau lub koom haum membrane thiab bioenergetics, thiab lub xeev tam sim no ntawm cov pov thawj thoob plaws kev tshawb fawb thiab kev kho mob.

Cardiolipin yog ib qho tshwj xeeb phospholipid enriched nyob rau hauv lub puab mitochondrial membrane. Nws qhov kev nplua nuj sib txawv ntawm cov ntaub so ntswg, hom cell thiab lub cev nqaij daim tawv, thiab nws ua lub luag haujlwm tseem ceeb hauv mitochondrial membrane lub koom haum thiab ua pa - chain function.

Nws lub luag haujlwm ua haujlwm suav nrog:

• Txhawb cristae architecture thiab mitochondrial membrane lub koom haum
• Pab npaj ua pa -chain complexes thiab supercomplexes
• Pab txhawb rau kev thauj khoom hluav taws xob zoo thiab oxidative phosphorylation
• Koom nrog cov txheej txheem thiab kev ua haujlwm ntawm mitochondrial membrane proteins

Nyob rau hauv cov xwm txheej ntawm oxidative kev nyuaj siab, kev laus thiab kab mob, cardiolipin tuaj yeem ua peroxidized thiab depleted. Qhov no tuaj yeem cuam tshuam cov qauv cristae, destabilize ua pa nyuaj thiab txo bioenergetic efficiency.

Lub tswv yim txheej txheem ntawm SS-31 lub chaw ntawm electrostatic thiab hydrophobic kev sib cuam tshuam nrog cardiolipin-muaj daim nyias nyias.

SS-31 yog ib tug tswv cuab ntawm tsev neeg Szeto-Schiller (SS) peptide. Nws nqa cov txiaj ntsig zoo arginine thiab lysine residues nrog rau cov ntxhiab tsw seem Dmt (2,6-dimethyltyrosine) thiab phenylalanine. Cov kev tshawb fawb qhia tias cov qauv no tsav ob qho kev coj cwj pwm tseem ceeb:

• Membrane kev sib tshuam- Cov tshuaj tsw qab thiab hydrophobic residues txhawb kev sib cuam tshuam nrog cov tub ntxhais hydrophobic ntawm sab hauv mitochondrial membrane, qhov twg peptide tau thov kom khi tsis zoo rau cardiolipin headgroups los ntawm electrostatic hu.
• Cardiolipin kev sib raug zoo- Cov kev tshawb fawb soj ntsuam qhia tau hais tias SS-31 cuam tshuam nrog cardiolipin hauv ib txoj hauv kev uas tuaj yeem txhim kho cov qauv ntawm daim nyias nyias, txo qhov cuam tshuam ntawm cardiolipin rau peroxidation, thiab pab tswj lub koom haum ntawm cov kab mob ua pa.

Tsis zoo li cov pa mitochondria- cov hom phiaj sib txuas uas nws qhov kev xav tau yog nyob ntawm qhov muaj peev xwm ntawm mitochondrial membrane, SS-31 tsis tuaj yeem piav qhia tsuas yog los ntawm electrophoretic attraction. Nws daim nyias nyias affinity thiab molecular qauv yog ib feem tseem ceeb ntawm lub tswv yim aiming mechanism.

SS-31 tau raug tshawb xyuas rau ob hom pa oxygen reactive (ROS)-scavenging kev ua si thiab cardiolipin-cuam tshuam los ntawm mitochondrial membrane lub koom haum. Cov pov thawj kev sim txhawb cov no raws li cov txheej txheem cuam tshuam, tab sis lawv cov txheeb ze koom nrog rau kev soj ntsuam kev lom neeg tsis tau daws tag nrho. Qhov uas cov txheej txheem no piav qhia txog cov txiaj ntsig thoob plaws cov ntaub so ntswg sib txawv, cov qauv kab mob thiab cov kev qhia hauv chaw kho mob tseem yog cov lus nug tseem ceeb ntawm kev tshawb fawb.

Los ntawm stabilizing cardiolipin- muaj cov domains, SS-31 yog npaj los txhawb cov txheej txheem kev ncaj ncees ntawm sab hauv daim nyias nyias cristae.

Nyob rau hauv cov kev ntxhov siab uas yuav txwv tsis pub txhawb cardiolipin peroxidation, kev hloov kho daim nyias nyias thiab kev cuam tshuam ntawm cristae, cov kev tshawb fawb qhia tias SS-31 tuaj yeem pab khaws cov txheej txheem membrane. Cov txheej txheem khaws cia no yog xav kom underlie ntau ntawm cov peptide tau tshaj tawm cov teebmeem cytoprotective hauv kev sim ua qauv.

Nyob rau theem ua haujlwm, SS-31 tau thov kom cuam tshuam ntau yam ntawm mitochondrial bioenergetics:

• Ua pa chain efficiency- Los ntawm kev txhawb nqa lub koom haum complex thiab supercomplex, SS-31 tuaj yeem txhim kho kev thauj khoom hluav taws xob thiab txo cov hluav taws xob los ntawm cov kab ua pa.
• ATP ntau lawm- Kev ua pa kom zoo tuaj yeem pab tswj tau ATP ntau lawm nyob rau hauv kev ntxhov siab.
• Reactive oxygen hom- Txo cov hluav taws xob xau tuaj yeem txo qis mitochondrial ROS ntau lawm ntawm qhov chaw, ntxiv rau ib qho ncaj qha ROS- kev ua haujlwm khawb.
• Calcium tuav- Qee qhov kev tshawb fawb kuj qhia txog kev cuam tshuam ntawm mitochondrial calcium tuav thiab permeability hloov pore tswj.

Cov teebmeem no tau txais kev txhawb nqa zoo tshaj plaws nyob rau hauv kev ntxhov siab; Kev txhim kho nyob rau hauv cov ntaub so ntswg noj qab nyob zoo feem ntau tsis tshua muaj nyob hauv cov kev tshawb fawb sim.

Cov ntaub ntawv pov thawj muaj zog sib txawv los ntawm hom kev kawm:

• Kev tshawb fawb biophysical thiab qauv membranemuab kev txhawb zog tshaj plaws rau kev sib cuam tshuam ntawm cardiolipin thiab daim nyias nyias stabilization qauv.
• Kev tshawb fawb txog kab lis kev cai ntawm testau tshawb xyuas kev txhim kho mitochondrial ua pa, txo ROS thiab ua rau muaj kev ntxhov siab ntau ntxiv -induced cell tuag hla ntau hom cell.
• Tsiaj kab mob qauvtau tshaj tawm cov txiaj ntsig zoo hauv plawv ischemia-reperfusion, skeletal leeg myopathy, raum raug mob, neurodegeneration thiab cov qauv kab mob ntawm lub qhov muag.

Cov teebmeem feem ntau muaj zog dua nyob rau hauv cov kev ntxhov siab ntau dua li cov ntaub so ntswg noj qab haus huv, thiab qhov loj ntawm qhov sib txawv ntawm cov koob tshuaj, txoj kev, sijhawm thiab qauv.

Kev txhim kho kho mob ntawm elamipretide tau nce siab rau cov lus qhia tshwj xeeb:

• Barth Syndrome- Thaum lub Cuaj Hlis 19, 2025, US FDA tau tso cai nrawm nrawm rau Forzinity™ (elamipretide txhaj) txhawm rau txhim kho cov leeg nqaij hauv cov neeg laus thiab cov menyuam yaus nrog Barth syndrome uas hnyav li 30 kg. Kev pom zoo yog nyob ntawm lub hauv caug extensor leeg lub zog ua qhov nruab nrab qhov kawg, thiab tom qab- kev tshawb fawb txog kev lag luam yuav tsum tau ua kom paub tseeb cov txiaj ntsig kho mob.
• Lwm yam qhia- Cov txiaj ntsig kho mob tsis tau zoo ib yam. Nyob rau theem 3 MMPOWER-3 kev sim hauv thawj mitochondrial myopathy, elamipretide tsis tau raws li nws cov ntsiab lus tseem ceeb rau 6-feeb taug kev deb lossis tag nrho qaug zog ntawm 24 lub lis piam.

FDA pom zoo siv rau Forzinity, ib qho kev txhaj tshuaj elamipretide rau cov cim npe Barth syndrome. Nws yuav tsum tsis txhob muab txhais raws li kev pom zoo ntawm kev tshawb fawb -qib SS-31 peptide hmoov, lwm yam formulations, los yog lwm yam kab mob.

Cov lus nug tseem ceeb tseem nyob:

• Lub caij nyoog molecular mechanism thiab khi cov koom tes txuas ntxiv ua kom zoo dua.
• Kev txhais lus los ntawm kev ua tau zoo ntawm preclinical rau tib neeg cov txiaj ntsig kho mob tseem tsis sib xws nyob rau hauv cov lus qhia.
• Kev noj tshuaj zoo tshaj plaws, kev xa khoom thiab sijhawm rau cov ntawv thov sib txawv tseem nyob hauv qhov chaw tshawb nrhiav.
• Lub sijhawm ntev - cov ntaub ntawv kev nyab xeeb thoob plaws txhua tus pej xeem tseem txwv.

Kev sib raug zoo ntawm SS-31 thiab cardiolipin yog dab tsi?

SS-31 tau thov kom cuam tshuam nrog cardiolipin nyob rau hauv lub puab mitochondrial membrane los ntawm electrostatic thiab hydrophobic contacts, pab kom stabilize daim nyias nyias qauv thiab txhawb kev ua pa chain koom haum. Qhov kev sib cuam tshuam no tau xav tias yuav txhawb nqa ntau ntawm nws cov kev tshaj tawm bioenergetic.

Puas yog SS-31 cuam tshuam rau mitochondrial bioenergetics?

Cov kev tshawb fawb qhia tias SS-31 tuaj yeem cuam tshuam mitochondrial bioenergetics los ntawm kev txhawb nqa lub koom haum ua pa thiab txo cov hluav taws xob. Cov teebmeem yuav suav nrog kev txhim kho ATP ntau lawm thiab txo ROS ntau lawm nyob rau hauv cov xwm txheej kev ntxhov siab.

Puas yog SS-31 zoo ib yam li elamipretide?

Yog lawm. SS-31 yog lub npe tshawb fawb ntau; elamipretide yog lub npe thoob ntiaj teb nonproprietary (INN) rau tib lub zog moiety. MTP-131 thiab Bendavia yog cov npe ntxiv hauv cov ntaub ntawv.

Cov kev tshawb pom preclinical puas txaus los tsim kom muaj kev kho mob zoo?

Tsis yog. Cov txiaj ntsig Preclinical muab qhov laj thawj thiab kev txhawb nqa pov thawj rau kev tshawb fawb soj ntsuam, tab sis lawv tsis lav rau tib neeg kev ua tau zoo. Cov txiaj ntsig ntawm kev kho mob yuav tsum raug soj ntsuam rau txhua qhov qhia sib cais.

Lub tswv yim cardiolipin-taim membrane-stabilizing mechanism, nrog rau kev soj ntsuam ROS-kev ua si, muab lub hauv paus rau kev nkag siab SS-31's preclinical teebmeem. Thaum cov pov thawj biophysical thiab cellular muaj zog, kev kho mob txhais lus tseem hloov pauv thiab qhia tshwj xeeb, raws li pom los ntawm Barth syndrome pom zoo thiab qhov tsis zoo MMPOWER-3 myopathy sim.

Rau cov lus qhia yooj yim rau peptide thiab nws tus kheej molecular, saib peb tsab xov xwm ntawm SS-31 peptide yog dab tsi. Yog xav paub ntxiv txog kev tshawb fawb dav dav, saib peb SS-31 peptide kev tshawb fawb hloov tshiab.

Yog xav paub ntxiv txog cov khoom lag luam thiab cov ntaub ntawv nrhiav, mus saib SS-31 Peptide Powder nplooj ntawv khoom.

Szeto HH (2014). Mitochondria- phiaj peptides: Pharmacophore kev txhim kho thiab kev siv tshuaj kho mob.Acc Chem Res. 47(7):2015-2023. 

Sparvero L., et al. (2026). Cardiolipin remodeling nyob rau hauv mitochondrial kev kho mob: translational pov thawj chains los ntawm elamipretide rau cov tswv yim tshiab.Pem hauv ntej Physiol. 17:1813119. 

Kara A., et al. (2024). Elamipretide hauv thawj mitochondrial myopathy: MMPOWER-3 theem 3 randomized tswj kev sim.Neurology. 

US Food and Drug Administration.Forzinity (elamipretide) txhaj tshuaj - cov ntaub ntawv sau npe. Cuaj hlis 2025.

PubChem.Elamipretide. PIB 11764719.