Ubururu bwa metilene no gusaza kw'amagufwa: impamvu ibyabonetse mu tugingo bitahanuye ibyabaye ku magufwa y'imbeba

Tekereza ikinyabutabire kigabanya ibikorwa by'utugingo dusenya amagufwa, cyageragejwe mu gasahani ka laboratwari kandi kigakora neza nk'uko byari byitezwe. Osteoclasts zifite intima nyinshi zikaba nke, igisubizo kigahinduka neza uko ingano y'ikinyabutabire yiyongera, kandi hakabaho ibisobanuro byumvikana bishingiye kuri mitokondiriya. Hanyuma icyo kinyabutabire kigahabwa imbeba mu gice kinini cy'ubuzima bwazo bumaze gukura, amagufwa yazo agasuzumwa mu mashusho y'ibipimo bitatu, ariko nta tandukaniro rikaboneka. Amagufwa ashaje agaragara nk'ashaje, yaba yarahawe uwo muti cyangwa atarawuhawe.

Ibyo ni byo ubushakashatsi bumwe bwo mu 2024 bwagaragaje nta kubihindura, kandi ni ngombwa kubyumva neza, kuko biri ku mupaka aho ibyinshi mu bivugwa ku nyongeramirire z'amagufwa bidashobora kurenga. Inyandiko ni iya Poudel na bagenzi be, yasohotse muri Aging muri Werurwe 2024, kandi umuntu wese ashobora kuyisoma ku buntu; bityo buri gipimo kiri hano gishobora kugenzurwa hifashishijwe isoko yacyo. Igisubizo cyayo cy'ingenzi ni uko nta ngaruka yabonetse. Ibisubizo bitagaragaza ingaruka si ugutsindwa. Ni ibisubizo, kandi iki gisubiza neza ikibazo gifite imbibi zisobanutse: ese guha imbeba ubururu bwa metilene cyangwa mitoquinone igihe kirekire, bigakora mu mubiri wose birwanya okisidasiyo, birinda amagufwa yazo gusaza? Oya.

Uko gusaza kw'amagufwa kugaragara mu mibare

Gutakaza amagufwa uko umuntu cyangwa inyamaswa isaza si ikintu kimwe gusa, ni yo mpamvu ubushakashatsi butapimye ikintu kimwe gusa. Bakoresheje tomografiya nto ibarwa na mudasobwa, abashakashatsi basuzumye ahantu hatatu mu magufwa: igice gikomeye cyo hanze hagati mu gihimba cy'igufwa ry'ikibero, igufwa ry'urusobekerane mu gice cyaguka hafi y'impera yo hasi y'igufwa ry'ikibero hafi y'ingingo, n'igufwa ry'urusobekerane mu ngingo ya gatanu y'umugongo wo mu rukenyerero. Kuri buri hantu banditse ibipimo bisanzwe by'imiterere mito y'igufwa. BV/TV ni umugabane w'ubunini ugizwe n'igufwa aho kuba umwanya urimo umusokoro. BMD ni ubucucike bw'imyunyu ngugu. Tb.Th, Tb.N, na Tb.Sp bisobanura umubyimba, umubare, n'intera hagati y'utubaho tugize urusobekerane rw'igufwa. Umubyimba w'igice gikomeye cyo hanze n'ubuso bw'ibice bikaswe mu bugari bisobanura imiterere y'igihimba cy'igufwa.

Tekereza igufwa ry'urusobekerane nk'inkingi n'utubaho bishyigikira inyubako biri imbere mu bubiko. Gusaza bikuraho tumwe muri utwo tubaho burundu, ibindi bikaba binini gake; bityo umugabane w'umwanya wuzuyemo ibyo byubatsi ukagabanuka, ibyasigaye bikarushaho gutandukana, kandi urwo rusobekerane rwose rugashobora kwikorera umutwaro muto kurushaho. Igice gikomeye cyo hanze cy'igufwa ni nk'urukuta rw'ubwo bubiko, na rwo rukagenda ruba ruto. Umuti urinda amagufwa wagombye kugaragara muri iyi mibare. Icyo ni cyo ubushakashatsi bwagerageje.

Ibyabereye mu gasahani ka laboratwari

Ubushakashatsi ku tugingo bwakoresheje umusokoro wakuwe mu magufwa y'ibibero no mu magufwa manini yo mu mirundi y'imbeba za UM-HET3 zifite amezi 6 kugeza kuri 7, ubwoko bufite ubudasa mu ngirabuzima fatizo kandi bwororwa hagamijwe ubushakashatsi ku gusaza. Habonetse ibintu bine, kandi byerekeza mu byerekezo bitandukanye, bityo buri kimwe gikeneye gusobanurwa ukwacyo.

Icya mbere, utugingo fatizo twa mesenchyme, turimo n'utuzavamo utugingo twubaka amagufwa, twakomeje kuba tuzima mu bipimo by'ubururu bwa metilene na mitoquinone kuva kuri 0.125 kugeza kuri 0.5 micromolar mu masaha 48. Nta burozi, nta kongera ubushobozi. Icya kabiri, igihe utwo tugingo fatizo twashishikarizwaga guhinduka osteoblasts mu buryo bwo kutworora butuma twubaka amagufwa, tugashyirwaho ibara rigaragaza alkaline phosphatase ku munsi wa 18, nta na kimwe muri ibyo binyabutabire cyahinduye igisubizo ku gipimo na kimwe cyageragejwe. Utugingo twubaka amagufwa two mu gasahani ntitwahindutse.

Icya gatatu, utugingo dusenya amagufwa two twarahindutse. Utugingo two mu musokoro tubanziriza osteoclasts, twashishikarijwe na M-CSF na RANKL, ari bwo buryo busanzwe bwo gukora osteoclasts, twakoze utugingo duke dufite intima nyinshi kandi tugaragaza TRAP uko igipimo cy'ikinyabutabire cyiyongeraga. Igabanuka risobanutse ryagaragaye hejuru ya 0.25 micromolar, ni ukuvuga ku gipimo cyo hejuru cyageragejwe cya 0.5. Iki ni cyo gisubizo gituma handikwa incamake nyinshi zirangwa n'icyizere, kandi ni ukuri mu mbibi zacyo: guhura n'ikinyabutabire mu buryo butaziguye kandi budahagarara mu gihe cyo korora utugingo byagabanyije ikorwa rya osteoclasts ku buryo bwari bushingiye ku ngano yacyo.

Icya kane, osteoblasts zimaze gukura zashyizwe muri ibyo binyabutabire amasaha 48, hanyuma zikorerwa ikizamini cy'umuvuduko kuri mitokondiriya, ntizagaragaje impinduka ifite akamaro mu mibare mu ikoreshwa rya ogisijeni ry'ibanze cyangwa iryo hejuru cyane, kuri buri kinyabutabire. Kuri 0.5 micromolar, byombi byasaga n'ibigabanya gato uguhumeka kw'utugingo, ariko iyo mpinduka ntiyageze ku rwego rw'akamaro mu mibare. Bityo mu gasahani nta kuzahura mitokondiriya mu tugingo twubaka amagufwa kwabonetse ngo gushyirwe iruhande rw'ingaruka yo kugabanya osteoclasts. Uburyo bwari bwatekerejwe, bwo kunoza imikorere y'ingufu binyuze mu ruhererekane rwo gutwara elegitoroni muri mitokondiriya, ntibwatanze ubwiyongere bupimika mu guhumeka kw'utugingo aho abashakashatsi babushakiye.

Ibyabaye mu mbeba

Hakurikiyeho amagerageza abiri ku nyamaswa, yari atandukanye cyane mu bunini.

Irigerageza rito ryakoresheje imbeba z'ingore za C57BL/6J zikomoka ku guhuza izifitanye isano, ubwoko bukoreshwa cyane mu bushakashatsi bw'ubuvuzi n'ibinyabuzima. Guhera ku mezi 18 y'amavuko, igihe kijya kungana n'iherezo ry'igice cyo hagati cy'ubuzima bw'imbeba, kimwe cya kabiri cyazo cyanyweye amazi arimo ubururu bwa metilene ku gipimo cya 250 micromolar mu gihe cy'amezi 6 cyangwa 12, kugeza zigeze ku mezi 24 cyangwa 30. Ingore z'amezi 18 zitahawe uwo muti zatanze ibipimo fatizo, naho ingore z'amezi 5 zerekana uko amagufwa akiri mato ameze. Gusaza kwakoze ibyo gusaza bisanzwe gukora. Mu ngingo y'umugongo ya L5, umugabane w'ubunini ugizwe n'igufwa wagabanutse hafi ya 35 ku ijana, ubucucike bw'imyunyu ngugu bugabanuka hafi ya 18 ku ijana, naho umubare w'utubaho tw'urusobekerane ugabanukaho hafi kimwe cya kabiri, hatitawe ku muti. Umubyimba w'igice gikomeye cyo hanze wagabanutse hafi ya 10 ku ijana hagati y'amezi 18 na 24, na hafi ya 30 ku ijana ku mezi 30. Ubururu bwa metilene ntibwahinduye umurongo na umwe muri iyo mpinduka.

Irigerageza rinini ryakozwe muri gahunda ya National Institute on Aging Interventions Testing Program, igerageza ibinyabutabire bishobora kugira icyo bihindura mu mbeba za UM-HET3 z'ibitsina byombi, ahantu hatatu. Ubururu bwa metilene ku gipimo cy'ibice 28 kuri miliyoni mu biryo, na mitoquinone ku gipimo cy'ibice 100 kuri miliyoni, byombi byatangiye gutangwa imbeba zikimara gukura, bikomeza kugeza ku myaka yazo ingana n'amezi hafi 22 kugeza kuri 24. Ahantu hatatu hamwe mu magufwa hasuzumwe hakoreshejwe micro-CT. Imbonerahamwe yasohotse igaragaza buri gipimo hakurikijwe igitsina n'umuti, ikoresheje isesengura ry'imibare ryakosowe, kandi inkingi y'umuti igaragaza igisubizo kimwe hose: nta ngaruka ifite akamaro mu mibare, nta sano hagati y'ingaruka y'umuti n'igitsina, ahantu na hamwe. Haba mu gice gikomeye cyo hanze cyangwa mu rusobekerane, mu gufwa ry'ikibero cyangwa mu mugongo, mu ngabo cyangwa mu ngore, ku bururu bwa metilene cyangwa kuri mitoquinone. Amagufwa yasazaga uko byari bisanzwe.

Imbonerahamwe ihuza ibyo bice byombi

Iyi ni yo nkingi ingingo yose ishingiyeho. Buri murongo uhuza ibyabonetse mu gasahani n'ibyabonetse mu nyamaswa ku gikorwa kimwe cy'ibinyabuzima, hakoreshejwe ibipimo by'ubushakashatsi ubwabwo.

Iyo usomye umurongo ku wundi, imbonerahamwe ikuraho uko bisa n'ibivuguruzanya. Igikorwa kimwe gusa muri bine byo mu tugingo ni cyo cyahindutse, kandi cyahindutse gusa hafi y'igipimo cyo hejuru cyageragejwe, utugingo duhura n'ikinyabutabire mu buryo butaziguye kandi budahagarara. Ibindi byose byo mu gasahani byari bisanzwe bitagaragaza ingaruka. Igisubizo cyo mu nyamaswa rero ntikigaragara cyane nk'ikivuguruza ibyabonetse, ahubwo kigaragara nk'ikibyemeza: ibisubizo bitatu bitagaragaza ingaruka, hamwe n'ingaruka imwe isaba ibihe byihariye mu tugingo twororewe, byavuyemo kutagira ingaruka na hamwe mu nyamaswa.

Imiterere y'amagufwa si igihe cyo kubaho

Hari urujijo rukwiye kugira igice cyarwo, kuko ubururu bwa metilene bufite koko ibyanditswe ku gihe cyo kubaho, kandi byoroshye kubifata nabi nk'ibyanditswe ku magufwa. Mu itsinda rya mbere rya Interventions Testing Program, ubururu bwa metilene ku gipimo kimwe mu biryo bwongereye igihe cyo kubaho ku gipimo cya 90th percentile cy'ingore za UM-HET3 hafi ya 6 ku ijana. Iyo yari ingaruka ku kubaho mu gice cya nyuma cy'ubuzima, idahinduye igihe cyo kubaho cyo hagati kandi itagize ingaruka mu ngabo. Mitoquinone ntiyagaragaje ingaruka ku gihe cyo kubaho mu gitsina na kimwe. Iyo mibare y'igihe cyo kubaho iva mu byanditswe na gahunda ku kuramba, si mu nyandiko y'amagufwa.

Umusanzu w'inyandiko y'amagufwa ni ugukomeza gutandukanya izo nyandiko zombi. Ikinyabutabire gishobora guhindura kubaho mu gice cya nyuma cy'ubuzima mu gitsina kimwe kitabitse na kimwe mu biranga amagufwa byapimwe. Kubaho kubara impfu ziterwa n'impamvu zose; micro-CT ibara utubaho tw'urusobekerane mu ngingo y'umugongo. Nta tegeko rivuga ko uburyo runaka bugomba gukorera ku magufwa kugira ngo bwongere igihe cyo kubaho, kandi ubu bushakashatsi ni ikimenyetso kitaziguye cy'uko ingaruka y'ubururu bwa metilene mu gice cya nyuma cy'ubuzima bw'ingore yanyuze mu yindi nzira. Umuntu wese ukoresha ibyabonetse ku gihe cyo kubaho nk'igihamya gishyigikira ubururu bwa metilene ku ndwara yo kumungwa kw'amagufwa aba akura amafaranga kuri konti itari yo. Uburyo rusange bwo gukomeza gutandukanya ibyo bimenyetso busobanurwa mu buryo bwo gusoma ubushakashatsi ku bururu bwa metilene.

Impamvu agasahani katahanuye ibyabaye mu mbeba

Hari ibisobanuro bitanu bihuye n'ibyabonetse, kandi kimwe ntigikumira ibindi.

Icya mbere ni uko ikinyabutabire kigera ku tugingo. Utugingo twororewe muri laboratwari twabaga mu kinyabutabire ubudahagarara ku bipimo bizwi. Imbeba zariye ibiryo birimo ikinyabutabire amezi menshi, kandi ubushakashatsi ntibwapimye ingano y'umuti mu musokoro cyangwa ikimenyetso na kimwe cy'ibyangijwe na okisidasiyo mu magufwa. Igipimo kigabanya osteoclasts iyo zigihawe mu buryo butaziguye gishobora kutigera kigera ku tugingo tuzibanziriza two mu musokoro kuri urwo rwego. Inyandiko yagerageje ingano imwe ya buri kinyabutabire mu nyamaswa nzima, bityo uko igisubizo gihinduka hakurikijwe ingano mu nyamaswa biracyatazwi.

Icya kabiri ni ubutabire. Ubwoko bwa ogisijeni bwitabira ibikorwa by'ubutabire ntibuba ikigega kimwe kivanze neza imbere mu kagingo. Bukorera mu bice bito mu gihe gito, kandi uburyo bwa okisidasiyo no kugabanya okisidasiyo muri mitokondiriya, mu mazi yo mu kagingo, no ku gishishwa cyako bukora ku rugero runaka butisunze ubundi. Mitoquinone yagenewe kwirundanyiriza muri mitokondiriya, mu gihe ibimenyetso bya okisidasiyo bituma osteoclasts zikora bishobora guturuka ahandi. Kugabanya ikigega kimwe si ngombwa ko bisubiramo ibyo gushyira akagingo kose mu kinyabutabire ubudahagarara bikora.

Icya gatatu ni uguhuza ibikorwa. Mu magufwa mazima, gusenya no kubaka birafitanye isano: osteoclasts n'utugingo tuziri hafi bitanga ibimenyetso bikurura utugingo twubaka amagufwa aho hamaze gusenywa. Kugabanya ikorwa rya osteoclasts ntibyongera igufwa ku rugero rungana n'iryo gabanyuka, kuko bishobora no gukuraho ibimenyetso bihamagara abaryubaka. Agasahani karimo gusa utugingo tubanziriza utundi ntigashobora kugaragaza iyi mikoranire isubiza ku byabaye. Amagufwa yo ntashobora kuyihisha.

Icya kane ni umutwaro amagufwa yikorera. Osteocytes zumva impinduka ziterwa n'imbaraga zikoreshwa ku magufwa, zigagena uburinganire bwo gusenya no kongera kubaka igufwa ryose. Uko inyamaswa zisaza zikagenda zigabanya kugenda, icyo kimenyetso cy'imbaraga kiragabanuka, maze gutakaza amagufwa bigakurikiraho nubwo umuti ugira ingaruka nto ku bwoko bumwe bw'utugingo. Abanditsi ubwabo bavuga imyitozo n'imbaraga zikorera ku magufwa zigashishikariza iyubakwa ryayo nk'ibishobora kugira uruhare rukomeye kurushaho. Ni uburyo bwitondewe bwo kuvuga ko amagufwa yumvira imbaraga z'umubiri kurusha ubutabire bwa okisidasiyo no kugabanya okisidasiyo.

Icya gatanu ni igihe byatangiriye, ariko gifite aho kigarukira. Mu igerageza rya C57BL/6J, gutanga umuti byatangiye ku mezi 18, igihe igice gikomeye cy'imiterere y'amagufwa cyari cyaramaze gutakara. Kandi nta kintu kigabanya isenywa ry'amagufwa gishobora kongera kubaka utubaho tw'urusobekerane twatobotse tukavanwaho hatabayeho n'imbaraga zishishikariza iyubakwa ku rugero rukwiye. Ariko igihe byatangiriye ntigishobora gusobanura byose, kuko gutanga ibinyabutabire muri Interventions Testing Program byatangiye imbeba zikimara gukura, nyamara na byo ntibyahinduye ikintu. Gutangira bitinze bisobanura igice kimwe cy'igerageza rimwe. Ntibisobanura na kimwe mu rindi.

Icyo ibi bivuze ku bivugwa ku bururu bwa metilene n'indwara yo kumungwa kw'amagufwa

Ku musomyi usuzuma ubururu bwa metilene ku buzima bw'amagufwa cyangwa ku gusaza kwayo, umwanzuro wo gukoresha ni mugufi. Ibimenyetso byiza kurusha ibindi biboneka ubu ku mbeba zakurikiranwe igihe kirekire bigaragaza ko guha imbeba ubururu bwa metilene cyangwa mitoquinone igihe kirekire nta nyungu byagiriye amagufwa, nubwo mu tugingo twororewe habonetse koko ingaruka yo kugabanya osteoclasts. Inyandiko ku gihe cyo kubaho zigaragaza ko ubururu bwa metilene bugira ingaruka nto mu gice cya nyuma cy'ubuzima bw'ingore gusa, kandi ubu bushakashatsi bwerekana ko iyo ngaruka itanyuze ku magufwa. Nta na kimwe muri ibyo bimenyetso gishyigikira kubukoresha ku bantu ku ndwara yo kumungwa kw'amagufwa, kandi nta makuru ku magufwa y'abantu ari muri iri sesengura. Ibibazo by'ingano ikoreshwa n'umutekano w'igicuruzwa ku bantu bireba umutekano w'ubururu bwa metilene n'ingaruka zabwo zitifuzwa, si aya magufwa y'imbeba.

Isomo ryimbitse rireba urutonde rw'ibimenyetso. Igisubizo cyo mu tugingo kivuga icyo ikinyabutabire gishobora gukora ku bwoko bumwe bw'utugingo mu gihe uko duhura na cyo bigenzurwa. Igisubizo cyo mu magufwa kivuga icyo amezi menshi y'ikinyabutabire kigera mu mubiri wose akora ku rugingo ruhuza ubwoko bubiri bw'utugingo rugengwa n'imbaraga zirukoreraho. Icya mbere ni ho ibitekerezo bigomba kugeragezwa bivukira. Icya kabiri ni ho, ku gusaza kw'amagufwa n'ibi binyabutabire bibiri birwanya okisidasiyo, iki gitekerezo cyarangiye.