Bya Cocer Peptides 
omwezi gumu emabega
EBINTU BYONNNA N’AMAWULIRE GW’EBINTU EBIweereddwa KU MUTINDO GUNO BIKOZESEBWA KU KUSASANYA AMAWULIRE N’EBIKOLWA BY’OKUSOMESA.
Ebintu ebiweereddwa ku mukutu guno bigendereddwamu kunoonyereza mu kisenge (in vitro research) byokka. Okunoonyereza mu vitro (Olulattini: *mu ndabirwamu*, ekitegeeza mu bikozesebwa mu ndabirwamu) kukolebwa ebweru w’omubiri gw’omuntu. Ebintu bino si bya ddagala, tebikkiriziddwa kitongole kya Amerika ekivunaanyizibwa ku by’emmere n’eddagala (FDA), era tebirina kukozesebwa kuziyiza, kujjanjaba oba kuwonya mbeera yonna ya bujjanjabi, bulwadde oba bulwadde. Kikugirwa nnyo mu mateeka okuyingiza ebintu bino mu mubiri gw’omuntu oba ebisolo mu ngeri yonna.
Okulambika okutwaliza awamu
Ekiwandiiko kino kinoonyereza ku nkola obutoffaali obukaddiye gye buyamba mu kutandika n’okukulaakulana kw’obulwadde bwa Alzheimer (AD). Obulwadde bwa Alzheimer bulwadde bwa bulijjo obw’okukendeera kw’obusimu obusinga kukwata abakadde, obumanyiddwa olw’okukendeera mu kutegeera okugenda mu maaso n’okubulwa enneeyisa. Ng’omuwendo gw’abantu mu nsi yonna gukaddiwa, omuwendo gwa AD gweyongera buli mwaka, nga gussa omugugu omunene ku bantu n’amaka. Wadde nga enkulaakulana ey’amaanyi ekoleddwa mu kunoonyereza ku AD, ekituufu ekivaako endwadde n’ensibuko y’obulwadde tekinnategeerekeka bulungi. Ng’ekimu ku bintu ebikulu eby’obulabe eri AD, okukaddiwa kw’obutoffaali kweyongedde okufaayo mu myaka egiyise olw’omulimu gwakwo mu ntandikwa y’obulwadde bwa AD. Okukuŋŋaanyizibwa kw’obutoffaali obukaddiye mu mubiri kukwatagana nnyo n’okutandika n’okukulaakulana kw’endwadde ez’enjawulo ezeekuusa ku myaka. Obutoffaali obukaddiye bukola kinene nnyo mu nkola y’obulwadde bwa AD, era okunnyonnyola enkola zaabwo ez’okukola kikulu nnyo mu kukola obujjanjabi obupya ku AD.
Ekifaananyi 1. Puloteeni ezireeta obulwadde bwa Alzheimer ziyamba mu kukaddiwa kw’obutoffaali bw’obwongo. (a) Okulaba enkolagana wakati w’obutoffaali bw’obwongo obukaddiye n’ebipande bya amyloid ne tau ewunyiriza. (b–e) Okulaba mu bujjuvu buli kika ky’obutoffaali n’ebintu ebikwatagana n’okukaddiwa ebyaloopebwa mu biwandiiko: (b) obusimu obuyitibwa neuron, (c) microglia, (d) oligodendrocyte/oligodendrocyte precursor cell, (e) astrocyte, ne (f) blood-brain barrier (BBB) erimu obutoffaali bw’omubiri, pericytes, ne astrocytes, nga biraga okukosebwa obulungi bwa BBB mu AD.
Okulambika kw’obutoffaali obukaddiye
(1) Ennyonyola n’Engeri y’Obutoffaali Obukaddiye
Okukaddiwa kitegeeza okukwata okukula kw’obutoffaali okutakyuka oluvannyuma lw’okuyita mu muwendo ogugere ogw’enjawulo oba okubeera mu nsonga ez’enjawulo ezikwata ku situleesi (nga okunyigirizibwa okw’okwokya, okwonooneka kwa DNA, okufunza telomere, n’ebirala). Obutoffaali obukaddiye bulaga engeri ez’enjawulo ez’enkula, omuli okweyongera kw’obunene bw’obutoffaali, okupapajjo, n’okulinnya kw’emirimu gya β-galactosidase (β-gal), nga kino kye kabonero akakozesebwa ennyo mu biramu okuzuula obutoffaali obukaddiye. Okugatta ku ekyo, obutoffaali obukaddiye bulaga upregulation of cyclin-dependent kinase inhibitors (nga p16INK4a ne p21Cip1), eziziyiza okukula kw’enzirukanya y’obutoffaali, ekireetera obutoffaali okukwata mu G1 phase oba G2/M phase era bwe kityo ne kiremesa okwongera okugabanya.
Enkola z’okutondebwa kw’obutoffaali obukaddiye
1. Oxidative Stress n’okwonooneka kwa DNA: Oxidative stress kye kikulu ekivaako obutoffaali okukaddiwa. Mu mbeera z’omubiri eza bulijjo, okukola n’okugogola ebika bya okisigyeni ebikola (ROS) munda mu butoffaali biri mu bbalansi ey’amaanyi. Naye, nga bakaddiye oba wansi w’embeera ezimu ez’obulwadde, okweyongera mu kukola ROS kivaako DNA okwonooneka. Okwonooneka kwa DNA bwe kukuŋŋaanyizibwa okutuuka ku ddaala eritali limu era nga tekusobola kuddaabirizibwa bulungi, omuddirirwa gw’amakubo agalaga obubonero gakola, gamba ng’amakubo g’obubonero aga p53-p21 ne p16-Rb, ne kireetera obutoffaali okuyingira mu mbeera y’okukaddiwa. Mu bitundu by’obwongo okuva mu balwadde b’obulwadde bwa Alzheimer, emiwendo gya oxidative stress girinnya nnyo, ekivaako okweyongera okwonooneka kwa DNA mu busimu obuyitibwa neurons ne glial cells, ekivaamu okukaddiwa kw’obutoffaali.
2. Okufunza telomere: Telomeres ze nsengeka za DNA eziddiŋŋana ku nkomerero za chromosomes ezikendeera mpolampola nga obutoffaali bwe bwawuddwamu. Telomeres bwe zikendeera okutuuka ku buwanvu obumu, zikola obubonero bw’okukaddiwa. Mu butoffaali obusibuka mu busimu, okufunza telomere kukwatagana nnyo n’okutandika kw’okukaddiwa, ekiyinza okukosa obusobozi bw’okwezza obuggya n’okwawukana kw’obutoffaali obusibuka mu busimu, bwe kityo ne kikosa enkula ya bulijjo n’enkola y’obusimu.
Enkola y’okukola kw’obutoffaali obukaddiye mu bulwadde bwa Alzheimer
(1) Okuyingiza okuzimba kw’obusimu
1. Omulimu gw’enkula y’ekyama ekwatagana n’okukaddiwa (SASP): Obutoffaali obukaddiye bulaga enkula ey’enjawulo ey’ekyama emanyiddwa nga enkula y’ekyama ekwatagana n’okukaddiwa (SASP). SASP erimu cytokines ez’enjawulo, chemokines, ensonga ezikula, ne proteases, nga interleukin-6 (IL-6), interleukin-8 (IL-8), ne tumor necrosis factor-α (TNF-α). Mu bitundu by’obwongo bw’abalwadde b’obulwadde bwa Alzheimer, obutoffaali bwa glial obukaddiye n’obusimu obuyitibwa neurons bifulumya ensonga nnyingi eza SASP, eziyinza okukola obutoffaali bw’abaserikale b’omubiri obugyetoolodde n’okuleetawo okuddamu kw’okuzimba okutambula obutasalako. IL-6 ne TNF-α zitumbula okukola kwa microglia, ekizireetera okukyuka okuva mu mbeera ey’okusirika okudda mu mbeera eyamba okuzimba, ne zifulumya abatabaganya okuzimba abasingawo n’okwongera okusajjula okuzimba kw’obusimu. Embeera eno ey’okuzimba etali ya bulijjo eyonoona obusimu obuyitibwa neurons, eremesa enkola y’obusimu obuyitibwa synaptic function, era ereeta obutakola bulungi mu kutegeera.
2. Ebikosa obutoffaali bwa glial: Okukaddiwa kw’obutoffaali obuyitibwa astrocytes ne microglia kukola kinene mu kuzimba kw’obusimu bwa AD. Astrocytes ezikaddiye zifulumya ensonga za SASP ezitumbula okukuŋŋaanyizibwa n’okuteekebwa kwa β-amyloid (Aβ) ate nga ziziyiza okufuluma kwayo. Okukaddiwa kwa microglia kukendeeza ku busobozi bwazo okulya Aβ, okuziyiza okugogola obulungi ebipande bya Aβ mu bwongo. Mu kifo ky’ekyo, zifulumya ebintu ebisingawo ebizimba, ne zikola enzirukanya embi eyongera okuzimba obusimu n’okuvunda kw’obusimu.
Ekifaananyi 2 Ebiraga okukaddiwa kw’obutoffaali byeyongera mu bwongo bw’ebibe bya hTau modeling tauopathy of AD.
(2) Okutumbula okuvunda kw’obusimu
1. Okwonoona obutereevu obusimu obuyitibwa neurons: Cytokines ne proteases ezimu ezifulumizibwa obutoffaali obukaddiye zisobola okwonoona butereevu obusimu obuyitibwa neurons. Matrix metalloproteinases (MMPs) kye kimu ku bitundu by’ekikuta ekikwatagana n’okukaddiwa (SASP), ekiyinza okusaanyawo matrix ey’ebweru w’obutoffaali ne puloteyina ezikwatagana n’obusimu obutambuza obusimu, ne kitaataaganya ensengekera n’enkola y’obusimu obuyitibwa neurons. ROS ekolebwa obutoffaali obukaddiye nayo esobola okuleeta okwonooneka kw’obusimu obuyitibwa oxidative damage ku neurons, ekivaako neuronal apoptosis n’okufa. Mu bitundu by’obwongo bw’abalwadde ba AD, okukaddiwa kw’obusimu kukwatagana nnyo n’okufa kw’obutoffaali, ekiyinza okuba ekimu ku bintu ebikulu ebivaako obutakola bulungi mu kutegeera.
2. Okutaataaganyizibwa mu kutambuza obusimu obutambuza obusimu: Okubeerawo kw’obutoffaali obukaddiye nakyo kiyinza okutaataaganya okusengejja, okufulumya, n’okutambuza obusimu obutambuza obusimu. Ensonga ezizimba zisobola okuziyiza okukola kwa acetylcholine, ekirungo ky’obusimu ekyetaagisa okukuuma enkola y’okutegeera eya bulijjo. Okugatta ku ekyo, ensonga ezimu ezifulumizibwa obutoffaali obukaddiye ziyinza okukosa okwolesebwa n’enkola y’ebikwata obusimu obutambuza obusimu, ekivaako obubonero bw’obusimu obutambuza obusimu obutali bwa bulijjo, okwongera okukosa empuliziganya n’okukola amawulire wakati w’obusimu, era bwe kityo ne kivaako okukosebwa mu kutegeera.
(3) Enkyukakyuka mu mpuliziganya wakati w’obutoffaali
1. Obubonero bwa Paracrine obutali bwa bulijjo: Obutoffaali obukaddiye buwuliziganya n’obutoffaali obugyetoolodde nga buyita mu bubonero bwa paracrine nga bufulumya ensonga za SASP. Ensonga zino zisobola okukosa enkola n’enkomerero y’obutoffaali obuliraanyewo, ekivaako okutaataaganyizibwa kw’omukutu gw’empuliziganya wakati w’obutoffaali. Mu bitundu by’obwongo bw’abalwadde ba AD, ensonga za SASP ezifulumizibwa obutoffaali bwa glial obukaddiye zisobola okukosa okukula kw’obusimu, okuwangaala, n’okwawukana, ate nga era zikwata ku microenvironment y’obutoffaali obusibuka mu busimu, ne ziziyiza okukula n’okwawukana kwazo, bwe kityo ne zikwata enkola z’okuzza obuggya obusimu n’okuddaabiriza.
2.Okutaataaganya enkolagana wakati w’obutoffaali: Obutoffaali obukaddiye era buyinza okutaataaganya ensengekera z’okuyungibwa wakati w’obutoffaali, gamba ng’ensengekera ennywevu n’ensengekera z’ebituli. Mu kiziyiza omusaayi n’obwongo, okukaddiwa kw’obutoffaali bw’omubiri (endothelial cells) kuleeta okukendeeza ku kwolesebwa kwa puloteyina ezikwatagana ennyo, okwongera ku kuyita kw’ekiziyiza ky’omusaayi n’obwongo n’okusobozesa ebintu eby’obulabe okuyingira amangu mu bitundu by’obwongo, ne kyongera okuzimba obusimu n’okuvunda kw’obusimu. Ensengekera z’ebituli wakati w’obusimu bukulu nnyo mu kutambuza obubonero bw’amasannyalaze n’okukwatagana kw’enkyukakyuka y’emmere wakati w’obusimu. Ensonga ezifulumizibwa obutoffaali obukaddiye ziyinza okutaataaganya enkola y’ensengekera z’ebituli, ne zikosa emirimu egy’okukwatagana n’okutambuza amawulire wakati w’obusimu obuyitibwa neurons.
(4) Ebikosa microenvironment y’obutoffaali obusibuka mu busimu
1. Okuziyiza okukula n’okwawukana kw’obutoffaali obusibuka mu busimu: Obutoffaali obusibuka mu busimu bubeera mu bwongo bw’ebisolo ebiyonka ebikulu era bulina obusobozi okwezza obuggya n’okwawukana mu busimu obuyitibwa neurons, astrocytes, ne oligodendrocytes. Ensonga za SASP ezifulumizibwa obutoffaali obukaddiye zisobola okukyusa microenvironment y’obutoffaali obusibuka mu busimu, ne ziziyiza okukula n’okwawukana kwazo. Cytokines ezimu mu SASP zisobola okulinnyisa okwolesebwa kw’ebiziyiza kinase ebisinziira ku cyclin, ekivaako obutoffaali obusibuka mu busimu okukwata ku mitendera egy’enjawulo egy’enzirukanya y’obutoffaali ne butasobola kuyita mu kugabanya n’okwawukana okwa bulijjo. Ensonga z’okuzimba ezifulumizibwa obutoffaali obukaddiye nazo ziyinza okukosa obulagirizi bw’enjawulo bw’obutoffaali obusibuka mu busimu, ne buzireetera okwawukana ennyo mu butoffaali bwa glial okusinga obusimu obuyitibwa neurons, bwe kityo ne kikosa okuddamu okukola n’okuddaabiriza kw’obusimu.
2. Enkosa ku kutambula kw’obutoffaali obusibuka mu busimu: Okusenguka kw’obutoffaali obusibuka mu busimu kikulu nnyo olw’okubeera mu kifo ekituufu n’okukola emirimu gyabyo mu bwongo. Ensonga ezimu ezifulumizibwa obutoffaali obukaddiye ziyinza okutaataaganya okutambula kw’obutoffaali obusibuka mu busimu, ne buziremesa okusenguka okugenda mu bitundu ebyetaagisa okuddaabirizibwa. Okwolesebwa okutali kwa bulijjo okwa chemokines kuyinza okukyusa obulagirizi bw’okusenguka kw’obutoffaali obusibuka mu busimu, ne buziyiza okutuuka mu kifo we bufunye obuvune okuddaabirizibwa, bwe kityo ne kikosa obusobozi bw’obusimu obw’okweddaabiriza.
Enkola z’obujjanjabi bw’obulwadde bwa Alzheimer nga zigenderera obutoffaali obukaddiye
(1) Ebintu ebiyitibwa Senolytics
1. Enkola y’okukola: Senolytics kibiina kya bikozesebwa ebisobola okulonda okumalawo obutoffaali obukaddiye. Enkola zaabwe ez’okukola okusinga mulimu okuleeta okufa kw’obutoffaali obukaddiye n’okuziyiza amakubo g’obubonero obuziyiza okufa kw’obutoffaali obukaddiye. Mu kiseera kino Dasatinib ne quercetin ze zisinga okusomesebwa mu kugatta eddagala eritta eddagala lya senolytics. Dasatinib esobola okuziyiza amakubo g’obubonero bwa kinase agasukkiridde okukola mu butoffaali obukaddiye, ate quercetin ayongera ku bikolwa bya dasatinib. Bwe zikozesebwa nga zigatta, zisobola okulonda okuleeta apoptosis mu butoffaali obukaddiye ne zikendeeza ku kukuŋŋaanyizibwa kwazo mu mubiri.
. Okunoonyereza kwazuula nti oluvannyuma lw’okuwa dasatinib ne quercetin combination therapy ku AD model mice, obungi bw’ebipande bya Aβ mu bwongo bwakendeera, okwonooneka kw’obusimu bwakendeera, era obusobozi bw’okuyiga n’okujjukira mu kifo bwalongooka.
Ekifaananyi 3 Okukaddiwa kw’obutoffaali ng’ekitundu ky’okukaddiwa okulamu ne AD.
(2) Ebikyusa enkula y’omubiri eby’ekyama ebikwatagana n’okukaddiwa (Senomorphics) .
1. Enkola y’okukola: Senomorphics zigenderera okulungamya okufulumya ensonga za SASP obutoffaali obukaddiye, okukendeeza ku bulabe bwazo ku butoffaali obubeetoolodde. Eddagala erimu eriziyiza okuzimba liyinza okuziyiza okwolesebwa n’okufulumya ensonga ezizimba mu SASP, okukendeeza ku kuzimba kw’obusimu. Ebirungo ebimu ebya molekyu entono bisobola okulung’amya amakubo g’enkyukakyuka y’emmere y’obutoffaali obukaddiye, ne bikyusa ensengekera ya SASP okunafuya ebikolwa byayo eby’obulabe ku butoffaali obugyetoolodde.
2.Potential Application Prospects: Enkizo ya senescence-associated secretory phenotype modulators eri mu busobozi bwazo okulongoosa tissue microenvironment nga okulungamya secretory function ya senescent cells okusinga okuzimalawo butereevu. Kino kiyinza okwewala obulabe obumu obuyinza okuva mu bikozesebwa mu kulongoosa obutoffaali obukaddiye, gamba ng’okwonooneka okutali kwa njawulo eri obutoffaali obwa bulijjo. Nolwekyo, senescence-associated secretory phenotype modulators zikwata essuubi ly’okukozesa erigazi era ziyinza okuvaayo ng’enkola empya ey’obujjanjabi eri AD.
Mu bufunzi
Obutoffaali obukaddiye bukola emirimu mingi mu kutandika n’okukulaakulana kw’obulwadde bwa Alzheimer. Okuyita mu nkola nga okuleeta okuzimba obusimu, okutumbula okuvunda kw’obusimu, okukyusa empuliziganya wakati w’obutoffaali, n’okufuga microenvironment y’obutoffaali obusibuka mu busimu, obutoffaali obukaddiye byongera ku nkola y’obulwadde bwa AD. Enkola z’obujjanjabi ezigenderera obutoffaali obukaddiye, gamba ng’okukola ebirungo ebigogola obutoffaali obukaddiye n’ebikyusa enkula y’omubiri (senescence-associated secretory phenotype modulators), biwa enkola empya ez’okujjanjaba AD.
Ensonda
[1] Hudson HR, Sun X, Orr M E. Ebika by’obutoffaali bw’obwongo obukaddiye mu bulwadde bwa Alzheimer: Enkola z’obulwadde n’emikisa gy’obujjanjabi[J]. Obujjanjabi bw’obusimu, 2025,22 (3): e519.DOI: https://doi.org/10.1016/j.neurot.2024.e00519.
[2] Singh S, Bhatt L K. Okutunuulira okukaddiwa kw’obutoffaali: Enkola eyinza okujjanjaba obulwadde bwa Alzheimer[J]. Eddagala lya molekyu mu kiseera kino, 2024,17 (1): e2033282951.DOI:10.2174/ 18744672176 66230601113430.
[3] Li R, Li Y, Zuo H, n’abalala. Alzheimer’s Amyloid-$eta$ Yanguya Okukaddiwa kw’Obutoffaali era N’anyigiriza SIRT1 mu Butoffaali bw’Obusimu bw’Omuntu[J]. Ebiramu ebikola ebiramu, 2024,14. https://api.semanticscholar.org/CorpusID:267505532. Enkola y’okukuuma obutonde bw’ensi
[4] Gaikwad S, Senapati S, Haque M, n’abalala. Okukaddiwa, okuzimba obwongo, ne oligomeric tau bivuga okukendeera kw’okutegeera mu bulwadde bwa Alzheimer: Obujulizi okuva mu kunoonyereza okwakolebwa mu bujjanjabi n’okusooka okukolebwa[J]. Obulwadde bwa Alzheimer n’Obulwadde bw’okusannyalala, 2023,20.DOI:10.1002/alz.13490.
[5] Dorigatti AO, Riordan R, Yu Z, n’abalala. Okukaddiwa kw’obutoffaali bw’obwongo mu bikolwa by’ebibe eby’obulwadde bwa Alzheimer[J]. Sayansi w’abakadde, 2022, 44 (2): 1157-1168.DOI: 10.1007 / s11357-022-00531-5.
[6] Tecalco-Cruz A. C., Zepeda-Cervantes J., López-Canovas L., n’abalala. Okukaddiwa kw’obutoffaali ne ApoE4: Ebivaamu mu bulwadde bwa Alzheimer[J]. Cns & Obuzibu bw'obusimu-Ebigendererwa by'eddagala, 2021,20 (9): 778-785.DOI: 10.2174/ 18715273206 66210628102721.
[7] Wang E, Lee S. Senolytics mu nkola y’obulwadde bwa Alzheimer[J]. Obuyiiya mu kukaddiwa, 2021,5 (Supplement_1): 637.DOI: 10.1093 / geroni / igab046.2420.
[8] Amram S, Iram T, Lazdon E, n’abalala. Okukaddiwa kw’obutoffaali bw’omubiri mu nkola y’ekibe ky’obulwadde bwa Alzheimer kutabaganyizibwa TGF-$eta$1 era kivaamu obutwa mu busimu[J]. Biorxiv, 2019. Enkola y’okukuuma obutonde bw’ensi mu bitundu by’eggwanga eby’enjawulo
[9] Perez V I. Ebikolwa bya rapamycin ebiziyiza obutoffaali okukaddiwa n’omulimu gwayo mu ndwadde, omuli n’obulwadde bwa alzheimer [J]. Obuyiiya mu kukaddiwa, 2019,3 (Supplement_1): S370.DOI: 10.1093 / geroni / igz038.1352.
