Kodi zotsatira zamatsenga ndi ntchito za urolithin A ndi ziti? Ndi zinthu ziti zomwe zimawonjezedwa?

 Urolithin A ndi chinthu chofunikira kwambiri chomwe chimagwiritsidwa ntchito kwambiri mu zamankhwala ndi chisamaliro chaumoyo. Ndi enzyme yomwe imapangidwa makamaka ndi impso ndipo imagwira ntchito yosungunula magazi. Zotsatira zodabwitsa ndi ntchito za Urolithin A zimawonekera makamaka m'mbali zotsatirazi.

Urolithin A imaletsa kuwonongeka kwa minofu

1. Limbikitsani kapangidwe ka mapuloteni a minofu ndikuyambitsa njira yolumikizirana ya mTOR

Cholinga cha njira yolumikizirana ya rapamycin (mTOR) kwa nyama zoyamwitsa ndi njira yofunika kwambiri yowongolera kapangidwe ka mapuloteni a minofu. Urolithin A imatha kuyambitsa njira yolumikizirana ya mTOR ndikulimbikitsa kapangidwe ka mapuloteni m'maselo a minofu.

MTOR imatha kumva zizindikiro monga zakudya ndi zinthu zomwe zimakula m'maselo. Ikayamba kugwira ntchito, imayamba mndandanda wa mamolekyulu olumikizirana omwe ali pansi pake, monga ribosomal protein S6 kinase (S6K1) ndi eukaryotic initiation factor 4E-binding protein 1 (4E-BP1). Urolithin A imayambitsa mTOR, phosphorylating S6K1 ndi 4E-BP1, motero imalimbikitsa kuyambitsa kumasulira kwa mRNA ndi kusonkhana kwa ribosome, ndikufulumizitsa kupanga mapuloteni.

Mwachitsanzo, poyesa maselo a minofu omwe adakulitsidwa mu vitro, atawonjezera urolithin A, zidapezeka kuti kuchuluka kwa phosphorylation kwa mTOR ndi mamolekyu ake olumikizirana kunakwera, ndipo kuwonetsa kwa zizindikiro za kapangidwe ka mapuloteni a minofu (monga myosin heavy chain) kunakwera.
Amayang'anira momwe minofu imagwirira ntchito polemba zinthu zinazake

Urolithin A imatha kulamulira kufotokozedwa kwa zinthu zolembera minofu zomwe ndizofunikira kwambiri pakupanga mapuloteni a minofu ndi kusiyanitsa maselo a minofu. Mwachitsanzo, imatha kukweza kufotokozedwa kwa myogenic differentiation factor (MyoD) ndi myogenin.

MyoD ndi Myogenin zimatha kulimbikitsa kusiyanitsa maselo oyambira a minofu kukhala maselo a minofu ndikuyambitsa kufalikira kwa majini a minofu, motero zimathandiza kupanga mapuloteni a minofu. Mu chitsanzo cha kufooka kwa minofu, pambuyo pa chithandizo cha urolithin A, kufalikira kwa MyoD ndi Myogenin kunawonjezeka, zomwe zimathandiza kusunga minofu ndikuletsa kuchepa kwa minofu.

2. Kuletsa kuwonongeka kwa mapuloteni a minofu ndikuletsa ubiquitin-proteasome system (UPS)

UPS ndi imodzi mwa njira zazikulu zowonongera mapuloteni a minofu. Pa nthawi ya kufooka kwa minofu, ma ligase ena a E3 ubiquitin, monga minofu atrophy F-box protein (MAFbx) ndi minofu RING finger protein 1 (MuRF1), amayamba kugwira ntchito, zomwe zimatha kuyika mapuloteni a minofu ndi ubiquitin kenako n’kuwawononga kudzera mu proteasome.

Urolithin A ikhoza kuletsa kuwonetsa ndi kugwira ntchito kwa ma ligase awa a E3 ubiquitin. Mu zoyeserera za nyama, urolithin A ikhoza kuchepetsa kuchuluka kwa MAFbx ndi MuRF1, kuchepetsa chizindikiro cha ubiquitination cha mapuloteni a minofu, motero kuletsa kuwonongeka kwa mapuloteni a minofu omwe amayendetsedwa ndi UPS ndikuletsa bwino kuchepa kwa minofu.

Kusintha kwa dongosolo la autophagy-lysosomal (ALS)

ALS imagwira ntchito yokonzanso mapuloteni a minofu ndi ma organelle, koma kugwira ntchito mopitirira muyeso kungayambitsenso kufooka kwa minofu. Urolithin A imatha kulamulira ALS pamlingo woyenera. Imatha kuletsa autophagy yambiri ndikuletsa kuwonongeka kwambiri kwa mapuloteni a minofu.
Mwachitsanzo, urolithin A imatha kulamulira momwe mapuloteni okhudzana ndi autophagy amagwirira ntchito (monga LC3-II), kuti athe kusunga homeostasis ya malo a minofu pomwe akupewa kuchotsa mapuloteni ambiri a minofu, motero zimathandiza kusunga minofu.

3. Kupititsa patsogolo kagayidwe ka mphamvu m'maselo a minofu

Kuchepa kwa minofu kumafuna mphamvu zambiri, ndipo mitochondria ndiye malo ofunikira opangira mphamvu. Urolithin A imatha kupititsa patsogolo ntchito ya mitochondria ya maselo a minofu ndikuwonjezera mphamvu zogwirira ntchito. Itha kulimbikitsa biogenesis ya mitochondria ndikuwonjezera kuchuluka kwa mitochondria.

Mwachitsanzo, urolithin A imatha kuyambitsa peroxisome proliferator-activated receptor γ coactivator-1α (PGC-1α), yomwe ndi njira yofunika kwambiri yowongolera mitochondrial biogenesis, kulimbikitsa kubwerezabwereza kwa DNA ya mitochondrial ndi kapangidwe ka mapuloteni ogwirizana. Nthawi yomweyo, urolithin A imathanso kukonza ntchito ya unyolo wopumira wa mitochondrial, kuwonjezera kapangidwe ka adenosine triphosphate (ATP), kupereka mphamvu yokwanira yochepetsera minofu, ndikuchepetsa kuchepa kwa minofu chifukwa cha mphamvu zosakwanira.

Amayang'anira shuga ndi mafuta m'thupi ndipo amathandizira kugwira ntchito kwa minofu

Urolithin A imatha kulamulira kagayidwe ka shuga ndi mafuta m'maselo a minofu. Ponena za kagayidwe ka shuga m'magazi, imatha kupititsa patsogolo kuyamwa ndi kugwiritsa ntchito shuga m'maselo a minofu, ndikuwonetsetsa kuti maselo a minofu ali ndi mphamvu zokwanira poyambitsa njira yolumikizirana ndi insulin kapena njira zina zokhudzana ndi kayendedwe ka shuga.

Ponena za kagayidwe ka mafuta m'thupi, urolithin A imatha kulimbikitsa kusungunuka kwa mafuta m'thupi, zomwe zimapangitsa kuti minofu isamavutike kugwira ntchito bwino. Mwa kukonza bwino kagayidwe ka shuga m'thupi ndi mafuta m'thupi, urolithin A imasunga mphamvu m'maselo a minofu ndipo imathandiza kupewa kuchepa kwa minofu.

Urolithin A imasintha kagayidwe kachakudya m'thupi

1. Kuwongolera kagayidwe ka shuga m'thupi ndikuwongolera kukhudzidwa kwa insulin
Urolithin A imatha kuwonjezera mphamvu ya insulin, yomwe ndi yofunika kwambiri kuti shuga m'magazi ikhale yokhazikika. Imatha kugwira ntchito pa mamolekyu ofunikira mu njira yolumikizirana ndi insulin, monga mapuloteni a insulin receptor substrate (IRS).

Mu mkhalidwe wa kukana insulini, phosphorylation ya tyrosine ya puloteni ya IRS imalepheretsedwa, zomwe zimapangitsa kuti njira yolumikizirana ya phosphatidylinositol 3-kinase (PI3K) isagwire ntchito bwino, ndipo yankho la selo ku insulin limafooka.

Urolithin A ikhoza kulimbikitsa phosphorylation ya tyrosine ya puloteni ya IRS, motero kuyambitsa njira yolumikizirana ya PI3K-protein kinase B (Akt), zomwe zimathandiza maselo kuyamwa bwino ndikugwiritsa ntchito shuga. Mwachitsanzo, mu zoyeserera za nyama, pambuyo pa urolithin A, kukhudzidwa kwa minofu ndi minofu yamafuta ku insulin kunakula kwambiri, ndipo kuchuluka kwa shuga m'magazi kunayendetsedwa bwino.

Amayang'anira kapangidwe ka glycogen ndi kuwonongeka kwake

Glycogen ndiye njira yayikulu yosungira shuga m'thupi, makamaka yomwe imasungidwa m'chiwindi ndi minofu. Urolithin A imatha kulamulira kapangidwe ndi kuwonongeka kwa glycogen. Imatha kuyambitsa glycogen synthase, kulimbikitsa kapangidwe ka glycogen, ndikuwonjezera kuchuluka kwa glycogen.

Nthawi yomweyo, urolithin A ingalepheretsenso ntchito ya ma enzymes a glycogenolytic, monga glycogen phosphorylase, ndikuchepetsa kuchuluka kwa glycogen yomwe imasungunuka kukhala shuga ndikutulutsidwa m'magazi. Izi zimathandiza kukhazikika kwa shuga m'magazi ndikuletsa kusinthasintha kwakukulu kwa shuga m'magazi. Mu kafukufuku wa mtundu wa matenda ashuga, pambuyo pa chithandizo cha urolithin A, kuchuluka kwa glycogen m'chiwindi ndi minofu kunawonjezeka, ndipo kuwongolera shuga m'magazi kunawongoleredwa.

2. Konzani kagayidwe ka mafuta m'thupi ndikuletsa kupanga mafuta acid

Urolithin A imaletsa kupanga mafuta m'thupi. Mu chiwindi ndi minofu ya mafuta, imatha kuletsa ma enzyme ofunikira popanga mafuta m'thupi, monga fatty acid synthase (FAS) ndi acetyl-CoA carboxylase (ACC).

FAS ndi ACC ndi ma enzyme ofunikira kwambiri pakukonza mafuta acids. Urolithin A imatha kuchepetsa kupanga mafuta acids mwa kuletsa ntchito yawo. Mwachitsanzo, mu chitsanzo cha mafuta mu chiwindi chomwe chimayambitsidwa ndi zakudya zokhala ndi mafuta ambiri, urolithin A imatha kuchepetsa ntchito ya FAS ndi ACC mu chiwindi, kuchepetsa kupanga kwa triglycerides, motero kuchepetsa kuchulukana kwa mafuta m'chiwindi.

Amalimbikitsa oxidation ya mafuta acid

Kuwonjezera pa kuletsa kupanga mafuta acid, urolithin A ingathandizenso kuwonongeka kwa mafuta acids. Imatha kuyambitsa njira zolumikizirana ndi ma enzyme okhudzana ndi oxidation ya mafuta acid. Mwachitsanzo, imatha kukweza ntchito ya carnitine palmitoyltransferase-1 (CPT-1).

CPT-1 ndi enzyme yofunika kwambiri mu mafuta acid β-oxidation, yomwe imayang'anira kunyamula mafuta acid kupita ku mitochondria kuti awonongeke ndi okosijeni. Urolithin A imalimbikitsa β-oxidation ya mafuta acids mwa kuyambitsa CPT-1, imawonjezera kugwiritsa ntchito mphamvu ya mafuta, imathandiza kuchepetsa kusunga mafuta m'thupi, komanso imapangitsa kuti mafuta agwiritsidwe ntchito bwino.

3. Kupititsa patsogolo kagayidwe ka mphamvu ndikuwongolera ntchito ya mitochondrial

Mitochondria ndi "mafakitale amphamvu" a maselo, ndipo urolithin A imatha kukulitsa ntchito ya mitochondria. Imatha kulamulira biogenesis ya mitochondrial ndikulimbikitsa kupanga ndi kukonzanso mitochondrial. Mwachitsanzo, imatha kuyambitsa peroxisome proliferator-activated receptor gamma coactivator-1α (PGC-1α).

PGC-1α ndi njira yofunika kwambiri yowongolera biogenesis ya mitochondrial, yomwe ingathandize kubwerezabwereza kwa DNA ya mitochondrial ndi kupanga mapuloteni okhudzana ndi mitochondrial. Urolithin A imawonjezera kuchuluka ndi ubwino wa mitochondria ndikuwonjezera mphamvu zopangira mphamvu za maselo poyambitsa PGC-1α. Nthawi yomweyo, urolithin A imathanso kukonza ntchito ya unyolo wopumira wa mitochondria ndikuwonjezera kupanga kwa adenosine triphosphate (ATP).

4. Kulamulira Kusintha kwa Kagayidwe ka Ma Cell

Urolithin A ikhoza kutsogolera maselo kuti ayambe kusinthidwa kagayidwe kachakudya, zomwe zimapangitsa kuti kagayidwe ka maselo kagwire bwino ntchito. Pakagwa mavuto ena kapena matenda, kagayidwe ka maselo kamatha kusintha, zomwe zimapangitsa kuti mphamvu ichepe komanso kupanga zinthu zichepe.

Urolithin A imatha kulamulira njira zolumikizirana zamagetsi m'maselo, monga njira yolumikizirana ya AMP-activated protein kinase (AMPK). AMPK ndi "sensor" ya kagayidwe ka mphamvu zamaselo. Urolithin A ikayambitsa AMPK, imatha kupangitsa maselo kusintha kuchoka pa anabolism kupita ku catabolism, ndikugwiritsa ntchito bwino mphamvu ndi michere, potero kukonza magwiridwe antchito onse a kagayidwe ka thupi.

Kugwiritsa ntchito urolithin A sikungokhudza zachipatala zokha. Komanso pang'onopang'ono kukutchuka mu zinthu zaumoyo ndi zodzoladzola. Urolithin A imawonjezeredwa ku zinthu zambiri zaumoyo kuti iwonjezere chitetezo cha mthupi, kupititsa patsogolo kuyenda kwa magazi komanso kulimbikitsa kagayidwe kachakudya. Zinthuzi nthawi zambiri zimakhala ngati makapisozi, mapiritsi kapena zakumwa, zoyenera magulu osiyanasiyana a anthu.

Mu gawo la zodzoladzola, urolithin A imagwiritsidwa ntchito kwambiri mu zinthu zosamalira khungu chifukwa cha kukonzanso maselo ake komanso mphamvu zake zoletsa ukalamba. Imatha kusintha kuyenda kwa magazi pakhungu ndikulimbikitsa kupanga collagen, motero imawonjezera kusinthasintha kwa khungu komanso kuwala. Makampani ambiri osamalira khungu apamwamba ayamba kugwiritsa ntchito urolithin A ngati chosakaniza chachikulu poyambitsa zinthu zoletsa ukalamba, kukonza ndi kunyowetsa khungu kuti akwaniritse kufunafuna kwa ogula khungu lokongola.

Pomaliza, monga chinthu chogwira ntchito m'thupi chokhala ndi ntchito zosiyanasiyana, urolithin A yawonetsa mwayi waukulu wogwiritsidwa ntchito m'magawo azachipatala, chisamaliro chaumoyo ndi kukongola. Pakukula kwa kafukufuku wasayansi, gawo logwiritsira ntchito urolithin A lipitiliza kukula, kupereka zosankha zambiri pa thanzi ndi kukongola kwa anthu.