Ọnọdụ spatiotemporal nke dendritic spines na ụbụrụ dị ndụ (2014)

  • 1Ngalaba Molecular, Cell na Developmental Biology, Mahadum California na Santa Cruz, Santa Cruz, CA, USA
  • 2Ngalaba Nkà Mmụta Ihe Ọmụmụ na James H. Clark Center, Mahadum Stanford, Stanford, CA, USA

Nyocha edemede Obere

Ihu ihu. Neuroanat., 09 Mee 2014 | doi: 10.3389 / fnana.2014.00028

nkịtị

Mkpụrụ osisi Dendritic bụ saịtị postsynaptik nke buru ibu kachasị nke ụbụrụ mammali, ma yabụ nwere ike bụrụ ọrụ ngosipụta nke synapses arụ ọrụ. Ọrụ ndị mere n'oge na-adịbeghị anya tụrụ aro na icheta ihe ncheta neuronal nwere ike jikọtara ya na mgbanwe ndị dị na mkpochapụ na mkpochapu akwara. Ọganihu nke teknụzụ enyerela ndị nchọpụta aka ịmụgharị ihe gbasara akwara na vivo n'oge mmepe yana n'okpuru ọnọdụ mmụta dị iche iche na ọrịa. Anyị kwenyere na nghọta ga-enyere gị aka ịghọta ụdị mgbanwe nke spine dị na spine, nke ga - enyere aka mee ka usoro ihe omimi gbanwee na mmezi ozi si na ụbụrụ dị ndụ.

Keywords: spain dendritic, na vivo, ihe onyonyo abuo, ihe-omuma nke ihe eji eme ya, ihe nlele neural, kortex

OKWU

Dendritic spines enwewo mmasị n'ọgbọ nke neuroscientists kemgbe nkọwa mbụ nke Santiago Ramón y Cajal ihe karịrị otu narị afọ gara aga (Ramon y Cajal, 1888). Ahịrị ndị a dị nro sitere n'osisi dendritic ahụ ma yie “ogwu na-ama amị ma ọ bụ obere mkpịsị ụkwụ” dị ka Cajal kọwara nke ọma. Ha bụ saịtị postsynaptic nke ọnụ ọgụgụ ka ukwuu (> 90%) nke synapses excitatory glutamatergic na ụbụrụ mammalian, ma nwee ihe ndị dị mkpa dị mkpa maka mkpụrụ ndụ postynaptic na plasticity. Ya mere, spines na ihe owuwu ha nwere ike ịbụ ihe ngosi maka njikọta synaptik na mgbanwe ya (Segal, 2005; Tada na Sheng, 2006; Harms na Dunaevsky, 2007).

Imirikiti ọmụmụ n'oge dendritic spain nyochachara anụ ahụ dị obosara na ọkụ ma ọ bụ microscopy electron (Lund et al., 1977; Woolley et al., 1990; Harris na Kater, 1994; Hering na Sheng, 2001; Lippman na Dunaevsky, 2005). Agbanyeghị na ha nyere ozi dị mkpa gbasara akwara mkpụrụ ndụ na nkesa, akụrụngwa anụ ahụ a kapịrị ọnụ jidere naanị “snapshots” nke spine. Ntinye nke usoro ihe eji eji ede ihe na microscopy multi-photon gbanwere ohia. Na 2002, ọrụ ịsụ ụzọ sitere na ụlọ nyocha abụọ (Grutzendler et al., 2002; Trachtenberg et al., 2002gosiputara ohere iji so otu nkpuru aka a na ụbụrụ dị ndụ ogologo oge (ya bụ, izu) nke oge. Na ụkpụrụ, spain dynamics nọchiri anya synapse dynamics. Ọ bụ ezie na spines kwụsiri ike na-anọchite anya kọntaktị synaptik, ọ bụ naanị obere akụkụ nke spins na-adịte aka na-anọchi anya kọntaktị synaptic dị mkpụmkpụ, ihe ndị ọzọ na-anọchi anya synaptogenesis na-adịghị mma (Trachtenberg et al., 2002; Knott et al., 2006; Cane et al., 2014). Site n'ọmụmụ ihe ndị dị ugbu a na-egosipụta foto siri ike nke spines: spines na-etolite, na-abawanye, na-agbagha ma na-agbazigharị n'oge ndụ ụmụ anụmanụ niile. Ọzọkwa, ụdị akwara ha na ihe na-agbanwe agbanwe na-adị iche n'etiti ụdị neuronal, gafere ọkwa mmepe, yana nzaghachi na ahụmịhe dị ka mkpali mkpali na mpụ ụfụ, mmụba gburugburu ebe obibi, na ụdị mmụta dị iche iche.Holtmaat na Svoboda, 2009; Fu na Zuo, 2011).

Nyocha a lekwasịrị anya na nsonaazụ ndị si na vivo imaging ọmụmụ. N'ịkọwapụta mgbanwe akwara dị na spain, ndị nchọpụta atụletụla akụkụ abụọ: mgbanwe n'ogo n'ogo akwara, yana ọnọdụ akọwapụtara n'akụkụ dine ebe spain na mkpocha ahụ dị. Ọ bụ ezie na ịdị nkọ nke spain na-enye ihe dị ka ọnụ ọgụgụ nke synapses excitatory na postsynaptik neuron, ọnọdụ nke spain na-emetụta ntinye aka nke sigasị eletriki na kemịkalụ kemịkalụ nke nzaghachi njikọ aka na soma (Nevian et al., 2007; Spruston, 2008). Ghọta etu esi arụ ọfụma na arụmọrụ nke physics na physioloji nke njikọta akwara ozi dị iche iche na ọnọdụ dị iche iche dị mkpa maka ịkọwapụta ihe na usoro nchekwa dị na ụbụrụ.

EGO NA-AKW SPKWỌ NSỌ

Udiri akwara dịgasị iche iche na neurons dịgasị iche iche, ma eleghị anya na-egosipụta ọdịiche dị na morphology na neuronal.Nimchinsky et al., 2002; Ballesteros-Yanez et al., 2006). Ọdịmma dị n'etiti mkpokọta ọkpụkpụ na mkpochapu ahụ na-ekpebi mgbanwe mgbanwe mkpanaka: njuputa nke spain karịa mkpochapu n'akụkụ ihe dị iche iche ga - eme ka ohere spain dọnye ya, na nke ọzọ. N'ime eriri afọ, ebe ngalaba dendritic na-akwụkarị chịm n'oge oge (Trachtenberg et al., 2002; Mizrahi na Katz, 2003; Chow et al., 2009; Mostany na Portera-Cailliau, 2011; Schubert et al., 2013), a na - etolite ma na - ekpochapụ spines mgbe niile. Ọnụego mkpokọ spain na mkpochapu ihe na-agbanwe ka oge na-aga, na-ebute mgbanwe na-abụghị monotonic na ịdị ogologo nke spain (ọnụ ọgụgụ Figure11). Dịka ọmụmaatụ, spines na apical dendar nke oyi akwa 2 / 3 pyramidal neurons na rodent cortex na-egosipụta nwayọọ nwayọọ na-ebelata mgbagha (elongation na shortening nke spines) na ntụgharị (akọwapụtara dịka ngụkọta nke uru na mfu nke spines) n'etiti ụbọchị mgbe ụbọchị 7 na 24 (P7-24; Lendvai et al., 2000; Cruz-Martin et al., 2010). Na agbanyeghị, njupụta nke spain na-abawanye oge niile (a)Cruz-Martin et al., 2010). Mgbe usoro a nke uru spine bara, mkpocha azụ na-amalite itughari, na-eduga n'ịbelata ịdị ukwuu nke spain (Holtmaat et al., 2005; Zuo et al., 2005b; Yang et al., 2009). N'agbata P28 na P42, 17% nke spines ka ekpochapu na apical dendar nke oyi akwa 5 pyramidal neurons na cortex mouse, ebe 5% nke mkpụrụ osisi ọhụrụ ka etolite n'otu oge ahụ (Zuo et al., 2005a, b). Dị mkpa, ọ bụghị okirikiri niile na-enwe mkpochapu mkpochapu: ndị nwere nnukwu isi na-akwụsi ike karịa nke dị gịrịgịrị. Dika okpukpu okpokoro isi nwere ike ime synaptik, ihe onyonyo a na egosi n’enye synapses siri ike karie ike.Holtmaat et al., 2005). Ọzọkwa, enwere ike ikpochapu oghere mbufụt ndị a na-emebeghị eme (Xu et al., 2009), na ọtụtụ akwara azụ siri ike etolite tupu etolite etolite etinyere na seulron okenye nke okenye (Zuo et al., 2005a; Yang et al., 2009; Yu et al., 2013). N’ikpeazu, n’azu umu anumanu n’agba na mkpochapu ihe ruru n’iru; spain njupụta na-anọgide na-agbanwe ike mgbe niile ruo mmalite nke ịka nká (Zuo et al., 2005a; Mostany et al., 2013).

IHE 1 

Ọkpụkpụ na-emegharị ihe dị iche iche na ndụ anụmanụ. Spinogenesis ngwa-ngwa na mmalite nke nwute ya na-esote nkwado azụ na-amalite nwayọ n'oge uto. N'oge mmadụ toro, ogwe mkpo ya na mkpochasị ahụ na -adata nha, yana obere akụkụ nke azụ ...

EGO NA-EKWUR DTA N'AKA EGO NA-EKWETA SENSORY Ahụmịhe

Cortex cortex nwere ikike dị ịtụnanya n'ịhazigharị ihe nhazi ya na mmeghachi omume. Ya mere, lee ka ahụmịhe mmetụta (ma ọ bụ enweghị ya) si emetụta akwara azụ bụ ihe masịrị ndị neuroscientists. Egosiputa mkpali mkpali siri ike na nke na-adịghị ala ala ka ọ na-enwe mmetụta dị ukwuu n'ọrụ mkpanaka, mana ezigbo nsonaazụ na-adabere na njikwa na ogologo oge, yana usoro mmepe nke anụmanụ. N'oge mmalite oge ọmụmụ, ihe na - eme ka sensọ na - arụ ọrụ mmụta na - eme ka ọ gbasie ike na matọtị nke spines. Na cortex visual visual òké, ịnapụ ndenye ọhụụ site na ọmụmụ gbochiri mbelata akwara nke spain na maturation nke spine morphology (Majewska na Sur, 2003; Tropea et al., 2010). Nhichapụ mkpụrụ ndụ ihe nketa nke onye na - enweta PirB mebiri mmetụta nke ịnapụ mkpụrụ ndụ na - eme ka akwara adị (Djurisic et al., 2013). Na ụmụ oke ndị ejirila ndagide ọhụhụ na mbụ, obere ọkụ ọgbụgba ọkụ nwere ike ịmịcha akụkụ nke usoro GABAergic, na-atụ aro ọrụ dị mkpa nke sehibitory serati na maturation nke synapses pụrụ iche (Tropea et al., 2010). Ka oge na-aga, ahụmịlị ahụ na-eme ka akacha mkpụrụ osisi (aka kọwara dị ka ọghọm spines). Mbelata nke ajị ihu niile na ụmụ oke 1 ọnwa-maka ụbọchị 4 ma ọ bụ 14 belatara belata mkpochasị mkpanaka na corelex gụrụ, mana ịhapụ oghere spine na-enweghị nnukwu nsogbu (Zuo et al., 2005b; Yu et al., 2013). Ihe mgbochi nke ọgwụ ọgwụ nke ndị na - anabata NMDA mebiri mmetụta nke ịbelata ụja, na - egosi itinye aka nke ụzọ nnabata nke NMDA na mkpochapu ụdị arụmọrụ dị (Zuo et al., 2005b).

Ọ bụ ezie na agbachasị agbachasị agbachasị agbachasị agbachasị agbachasị ọsọ ọsọ na - ewepu ihe ọhụụ na - eme ka ọ bụrụ ihe ọ bụla na - eme ka ọ dị mma na - eme ka ọhụụ ọhụụ na - eme ka ọhụụ. Egosipụta ụdị paradaịs a iji kwalite ntụgharị akwara na ime ka akwara ndị a kpụrụ akpụ na-ahọpụta n'okpuru mkpụrụ nke neurons cortical neurons (Trachtenberg et al., 2002; Holtmaat et al., 2006). A na-emekarịrị oghere dị ọhụrụ na oyi akwa 5 pyramidal neurons nwere nnukwu mkpokọ apical, kama ndị nwere obere fufts (Holtmaat et al., 2006). Na αCaMKII-T286A ụmụ irighiri ihe ụmụ irighiri ihe, chessboard trimming emeghị ka ọ kwụsie ike nke mkpịsị ọhụụ na-agafe na ókèala dị n'etiti oghere ndị anaghị emebi emebi na ndị na-enweghị ụkọ (Wilbrecht et al., 2010). N'oge na-adịbeghị anya, ọmụmụ mara mma na-ejikọta mkpali nke optogenetic na na vivo Onyonyo gosipụtara na ọ bụ usoro nke ọrụ akwara, kama ịdị ukwuu, na-ekpebi nkwụsi ike nke mkpụrụ osisi dendritic (Wyatt et al., 2012).

Yiri chessboard trimming, obere ụkọ ụsọ (MD) na - eme ka ọdịiche dị n'etiti ntinye site na anya abụọ. Site n'ụdị dị n'ụdị nke chessboard trimming, MD achọpụtala ka ọ na-abawanye oghere spain tinyere apical dendritic tufts of the layer 5 pyramidal neurons na mpaghara binokụla nke cortex visual visual. Agbanyeghị mmetụta a na - ahụghị anya na okirikiri 2 / 3 neurons, ma ọ bụ mpaghara mpaghara (Hofer et al., 2009), ọzọ na-egosi ụdị mkpụrụedemede akọwapụtara nke synapse. N'ụzọ na-akpali mmasị, MD nke abụọ emeghị ka ọkpụkpụ azụ dịkwuo elu, ma na-ahọpụtachasị oghere ndị etolite n'oge MD nke mbụ, na-atụ aro na oghere ọhụrụ ndị etolite n'oge MD mbu nwere arụ ọrụ arụmọrụ nke na-arụ ọrụ n'oge MD nke abụọ.Hofer et al., 2009).

EGO NA-AKW SPKWỌ DINER SP NSỌ

Naturedị dendritic spines siri ike na-eme ka e nwee echiche zuru ebe nile na spines nwere ike rụọ ọrụ dị ka usoro maka mmụta na ebe nchekwa. A na - atụ aro na mkpụrụ osisi ọhụụ na - apụta (ọ na - eji obere isi) enwetara ebe nchekwa, ebe spines kwụ ọtọ (nke nwere nnukwu isi) bụ ebe nchekwa nchekwa (Bourne na Harris, 2007). N'ezie na vivo Ihe omumu egosiputala na nkpuru okwu uto, uto spain na nmekorita ya. N'ime eriri akpa akụrụngwa, mkpụkpụ azụ na-amalite ozugbo ụmụ anụmanụ na-amụta ọrụ ọhụrụ. Site na spinogenesis ngwa ngwa, nkwụghachi nke spain na-alaghachi na ọkwa dị ala site na mkpochasị spain.Xu et al., 2009; Yu na Zuo, 2011). Na nnụnụ ukwe, a na-ahụta ihe ga - eme ka azụta azụ ka ọ dị tupu agụmakwụkwọ abụgoro ịnwe ike dị ukwuu maka i imomi abụ na-esoteRoberts et al., 2010). Na ụmụ oke, ego nke spaines nwetara n'oge mmụta izizi kwekọrọ na arụmọrụ moto nke inweta mmụta.Xu et al., 2009); nlanarị ọgịrịga ọhụrụ na njikọta nke ọgbụgbọala (Yang et al., 2009). Ọzọkwa, nkà dị iche iche nwere ike itinye ya na mpempe akwụkwọ dị iche iche dị na cortex dị iche iche, ebe ịmụtakwa ihe ọhụụ banyere akụrụngwa a zụrụ azụ na-aga n'ihu na-eweta ntụgharị siri ike na cortex okenye okenye.Xu et al., 2009). N'oge na-adịbeghị anya, achọpụtakwala na ọkwa glucocorticoid na-emetụta mgbanwe akụrụngwa nke akwara ozi. Ọzụzụ nku ụmụ obere ihe dị na glucocorticoid rụpụtara ọnụego dị elu nke spain, ebe nsogbu glucocorticoid na-agbaso ọzụzụ dị mkpa maka ịkwụghachi azụ nke etolite n'oge ọzụzụ na ncheta ogologo oge (Liston et al., 2013). Ihe riri ahu, nke anakpo dika akwukwo nkputa (Hyman, 2005), na-eweta mgbanwe ndị a na-adị nwa oge na mgbanwe akwara dị ka mmụta moto. N'iji udiri uzo e ji cocaine mee ihe, ihe omumu ihe omumu emere na nso nso a gosiputara na izipu ekpueze na mbu kwalitere oghere n’azu ihu, ya na onu ogugu ohuru nwere ihe jikotara ya na otutu ihe jikọrọ ya na onodu ozo.Munoz-Cuevas et al., 2013). Ọ dị mma ịmara na mgbanwe nke spain na mpaghara cortic dị iche iche nwere ike ịdị iche n'otu ọrụ. Iji maa atụ, atụ ịma mma nke na-egosipụta ihu abụọ na nyocha ihu ya na egosila ihu ihe dị na auditory na n'ihu ihu. N'ime cortex auditory, a chọpụtara na mmụba azụ nwere ihe jikọrọ ya na ọnọdụ ịtụ egwu jikọtara ọnụ, ebe ọnọdụ adịghị ọcha nwere njikọ na mkpochapu azụ azụ (Moczulska et al., 2013). N’ime ọgbakọ mkpokọ ihu, mkpokọ mkpụkọ ka a na-ahụ anya na mmụta, ebe mkpokọta okpo yana egwu ikpochapu, na iwezigharị oghere ndị ewepụtara n'oge ikpochapu (Lai et al., 2012). Ka ejikọtara ọnụ, ọmụmụ ndị a na-ekpughe ọdịiche dị iche iche nke iwu nwa oge na-esite na okirikiri iku ume mmụta. Ma etolite ma ọ bụ ewepu akwara azụ n'oge mmụta na-esite na akparamagwa ya yana otu ụdị akwara ozi yana ụdị sel na-esonye na usoro mmụta.

Ọ dị mma ịmara na ihe atụ niile a tụlere n’elu na-ezo aka na ebe nchekwa na-enweghị nkọwa, nke na-adịghị etinye ncheta nke oge a kapịrị ọnụ, ọnọdụ, na ahụmịhe nke ngosipụta (ya bụ, na nkwupụta nkwupụta). Nchoputa nke na vivo mgbanwe akwara azụ na ebe nchekwa na-ekwupụta na-esiri ike karịa. N'otu aka, a na-eli ozu hippocampus, ihe owuwu dị mkpa maka ịpụta ebe nchekwa dị n'okpuru akwa cortex ma gafere ike microscopy abụọ-photon. N'aka nke ọzọ, a na-echekwa nkwupute na-ezisa ozi na nnukwu netwọọ neocortical, na-eme ka o sie ike maka ịse foto. Yabụ, ọganihu nke usoro ụbụrụ dị omimi (dịka microendoscopy, ihe na-agbanwe agbanwe) yana nghọta ka mma banyere ikenye ebe nchekwa na cortex na-ejide isi nyocha maka ọdịnihu nyocha nke mgbanwe akwara dị n'okpuru.

EGO NA-AJ DTA N'ỌRỌ ọrịa

Achọpụtawo mgbanwe na dendritic spain densen n'ọtụtụ ọrịa akwara na akwara. Ọgba aghara nke ọ bụla na-egosipụta ụdị nnabata ya na spain, nke na-ekwenyekwu n'echiche ahụ na spain bụ ihe nhazi maka ịrụ ọrụ kwesịrị ekwesị. Enwere nkwekọrịta na-eto eto na abaghị uru ejikọtara azụ na akparamaagwa nke omume na ọdịda nke ọrụ ịma ihe (maka nkọwa zuru ezu Fiala et al., 2002; Penzes et al., 2011).

N'ime ụdị ọrịa strok, egosiri na ischemia siri ike na-eduga na mkpụmkpụ azụ ngwa ngwa, nke a na-atụgharị mgbe agbaghachara ma ọ bụrụ na a napụtara nzọpụta n'ime obere oge (20 – 60 min; Zhang et al., 2005). Ihe na-esochi ọrịa ọgbụgba, ọkpụkpụ azụ na mkpochapụ mmụba na mpaghara peri-infarct, mana ọ bụghị na mpaghara cortical dị anya site na infarct ma ọ bụ mpaghara mbibi (Brown et al., 2009; Johnston et al., 2013). Plasticity a na-eweta mmerụ ahụ ruru ogo kachasị elu ya na 1 izu post-strok; site na mgbe ahụ na ọnụego nke spain na iwepu nwayọọ nwayọọ na-agbada. Ihe omume a n’egosiputa ịdị adị nke oge dị oke mkpa nke anụ ahụ na-adị ndụ na-adịkarịghị mma na-agwọ ọrịa (Brown et al., 2007, 2009). N'ime usoro nke òké maka ihe mgbu na-adịghị ala ala, akwara akwara sciatic akụkụ akwara na-eme ka ọkpụkpụ azụ na mkpochapu ọkpụkpụ. Yiri ụdị ihe atụ a, ibuli okpukpo dị elu karịa nke mkpochapụ, na-eduga na mmụba mbụ nke ịdị nkọ spain yana mbelata ya. Enwere ike iwepụ mmetụta ndị dị otú ahụ site na mgbochi tetrodotoxin, na-egosi na idozi akwara post-lesion bụ ihe metụtara ọrụ (Kim na Nabekura, 2011).

A kọwokwa na mgbanwe mgbanwe azụ azụ n'ụdị anụmanụ nke ọrịa na-emebi emebi. Iji maa atụ, a ga-agbatị mkpụmkpụ mkpụmkpụ ebe a na -ewe amịloid gburugburu na cerebral cortex (Tsai et al., 2004; Spiers et al., 2005). N’ihe anụmanụ jiri usoro ọnụnọ akwara ọrịa Huntington na-abawanye, mana akwara ndị a guzobere anaghị adịgide na-etinye ha n’ime sekit dị n’ime obodo, nke na-ebute ibelata ụdọ n’ọkpụkpụ azụ (Murmu et al., 2013). Ọ bụ ezie na ọrịa ọrịa neurodegenerative na-ejikọkarị na mkpụkpụ azụ, ụbụrụ neurodevelopmental na-egosipụta ọdịdị dịgasị iche iche nke spain. N ’usoro nke mkpụrụ osisi Fragile X syndrome, akwara dị ọtụtụ, pasent dị elu n'ime ha na-etokwa ntozu anya na nyocha nke mkpụrụ ndụ tozuru oke (Comery et al., 1997; Irwin et al., 2000). Na vivo Ọmụmụ ihe gara n'ihu gosipụtara na anụmanụ ndị dị otú ahụ ntụgharị azụ na-abawanye n'akụkụ dị iche iche cortic (Cruz-Martin et al., 2010; Pan et al., 2010; Padmashri et al., 2013), azọghịkwa ịgbachapụ agbachasị agbacha agbacha ma ọ bụ ịkwọ ụgbọala nwere ike ịgbanwe ọnọdụ mkpagharịPan et al., 2010; Padmashri et al., 2013). Na MiceP2, ụmụ oke nwere oke metụtara ọrịa Rett, a chọpụtara na uru ọghọm ya na ọghọm dị elu. Agbanyeghị, mkpụrụ osisi ndị ọhụrụ na-enwe ike iwepu karịa ụmụ oke oke ọhịa, na-ebute ụgbụ azụ (Jiang et al., 2013).

NIILE GA-EGO KA EGO NA-EKPERE NIILE

Usoro akwara nwere mkpụrụ ndụ abụọ: neurons na glia. Ọrụ kachasị akpali akpali nke mkpụrụ ndụ glial bụ ntinye ha na arụmọrụ synaptik na arụmọrụ. N'oge na-adịbeghị anya, ọmụmụ ihe ole na ole na-atọ ụtọ nyochara ọrụ nke mgbaàmà glial na mgbatị nke spain na plasticity. Dịka ọmụmaatụ, egosiri mmụba nri ume ọkụ astrocytic gụrụ amamịghe iji mee ka mkpụchasị mkpụmkpụ azụ dabere n'oge ntorobịa (Yu et al., 2013). Achọpụtala ụdị mkpụrụ ndụ glial ọzọ, microglia, ahụwokwa na ha na nsoro na dendritic spines. A na-achịkwa motility nke usoro microglial na kọntaktị spain site na ahụmịhe sensọ ma na-etinye aka na mkpochapu spain (Tremblay et al., 2010). Na mgbakwunye, mbelata microglia rụpụtara na mbelata nke nnukwu mmụta mmụta akwara na-akpata akwara, yana ịhọrọ ihe ụbụrụ na-akpata neurotrophic (BDNF) na microglia weghachiri nsonaazụ microglial (Parkhurst et al., 2013).

EGO NA-EGO EGO SPIN DINAM

Imzọ ọnya na-egosi na mpụta na ọghọm nke spines abụghị otu ma ọ bụ na-apụ apụ na dendarawa, kama na-ewere ọnọdụ “ebe dị ọkụ. agbasaghị ụyọkọ. Ọzọkwa, mgbakwunye nke ọkpụkpụ azụ nke abụọ dị na ụyọkọ na-ejikọkarị ya na itinye aka na azụ ọhụrụ. N'aka nke ọzọ, akwara etolite n'oge ana - egbu ihe dị iche iche maka ọrụ moto ma ọ bụ n'oge mmụba moto anaghị agbakọ.Fu et al., 2012). Ka emekọtara onwe ha, ihe ndị a na-egosi na achọrọ ugboro ugboro maka azụ azụ nke mbụ maka oghere mkpụrụ nke ọtị nke ọhụrụ. Achọpụtala ụdị oghere mkpụrụedemede a na-atụ egwu ọnọdụ a na-atụ egwu: a na - ejikarị spain dị nso na gburugburu ya (n'ime 2 μm) n'oge mkpochapu egwu ()Lai et al., 2012). N'ụzọ na-akpali mmasị, mgbanwe nke spain na-enwekwa mmetụta site na mgbanwe nke synapses inhibitory. Mwepu Monocular na-abawanye ike achikota nke spines na synepses inhibitory dị nso na oyi akwa 2 / 3 pyramidal neurons (Chen et al., 2012). Nchoputa ndi a kwadoro usoro ihe eji achapu achapu achapu achapu, nke na-edobe ihe synapses gbara agba nwere ike itinye aka na ntinye otu ozi karia nke synapses gbasasiri n’obere dendritic arbor (Govindarajan et al., 2006).

Ijikọta na vivo Ndekọ mkpụrụ ndụ akwara niile na otu mkpụrụedemer kalịnal, ọrụ na-adịbeghị anya gosipụtara na akwara ndị na-emegharị maka obere oge dị iche iche na-agafe n'akụkụ dendardị nke pyramidal neurons na cortex mouse.Chen et al., 2011). Nchọpụta a na-ewelite ajụjụ na-akpali mmasị: mkpụrụ ọhụụ ga-ejikọtara ọnụ na ntinye nwere njiri mara ma ọ bụ nke dị iche (dịka ọmụmaatụ ọrụ, njigharị ihe)? Iji lebara ajụjụ a anya, ọ ga-adị mkpa ịlele spines n'akụkụ dị obosara nke dendritic arbor, mata “ebe dị iche iche” nke spaine ma ọ bụ ijikọta usoro nke spines ya na ezigbo eserese oge. Nnwale ndị dị otú a agaghị enyere aka mee ka usoro mkpụrụ ndụ dịkwuo elu nke idozi arụmọrụ arụ ọrụ, kama ọ ga-enyekwa nkọwa maka nnọchite ozi na ichekwa neurons.

EGO NA-AH. NSỌ

N’isiokwu a, anyị enyochaala nyocha n’oge na-adịbeghị anya banyere mgbanwe akwara dendritic na ụbụrụ dị ndụ. Agbanyeghị na ọmụmụ ihe ndị a emeela ka nghọta anyị dị elu gbasara etu ihe si aga n’ihu na-agbanwe oge na oge, ọtụtụ ajụjụ na-eche n’ihu dị iche iche. Iji maa atụ, enwere akara mpempe akwụkwọ nke na-amata ọdịiche dị n’etiti mkpụmkpụ azụ na a ka ga-ewepụ? A na-eme ka ngụkọta nke spines site na usoro dị na homeostatic, ka dendrite wee nwee ike ịkwado mkpa metabolic nke nnyefe synaptik? Cyọkọ ọgịrịga ọhụrụ na-egosipụta mgbanwe na ike nke njikọ dị na otu axon (ka ị na-ejigide otu njikọ netwọkụ), ka ọ na-egosi nguzobe nke njikọ ndị ọzọ na axon na-ejikọtaghị na mbụ? Ọ dị mma ịmara na ọrụ niile a tụlere n’elu lekwasịrị anya n'akụkụ postsynaptik, nke bụ naanị ọkara nke akụkọ ahụ. Ihe ọzọ dị mkpa na-ekpebi ihe nkesa spine na mgbanwe dine bụ n'akụkụ presynaptik: njirimara na geometry nke axabi axon na nnweta nke axonal boutons. Mara ụdị ọgwụ ahụ dị mkpa iji dozie ọtụtụ ajụjụ ndị na-esite na nrịba ama nke spain. Agbanyeghị, njirimara onye jikọrọ ọgwụ ọgwụ dendritic na-aga n'ihu ka bụ ihe ịma aka a na-ahụ anya, n'ihi na axon presynaptic nwere ike si na plethora nke isi mmalite, ma na-agbanyekarị n'ọtụtụ usoro ndị ọzọ. Na mgbakwunye, a ka ga-amụta ọtụtụ ihe maka usoro nrụghari nke ana - eme na saịtị kọntaktị dị n'etiti boutọn na eriri azụ, yana otu usoro dị otu a si emetụta njikọ na mkpochapu nke synapses. N'iji oge a na -eme ngha ngba na ntaneti imekorita ya na nmeghari omume ga-enye otutu ihe omuma iji lebara ajuju a. Nnyocha nyocha nke ochie dị ka microscopy elektrọn (Knott et al., 2009na Array Tomography (Micheva na Smith, 2007; Micheva et al., 2010) nwekwara ike imeju na vivo na-egosi iji gosipụta ọnụnọ nke synapses, na ikpughe mkpịsị mkpịsị mkpịsị aka nke ihe ndị mepere emepe.

Usoro usoro iheomume na nhazi oge nke njikọta akwara ozi, na etu mgbanwe ndị a si gbakọ ụtụ na ntughari akparamagwa n'ihi ahụmịhe nke ahụ, bụ otu n'ime ajụjụ dị mkpa na akwara ozi. Ọga n’ihu n’ime usoro onyonyo, ya na mmepe n’ime electrophysiology, mkpụrụ ndụ ihe nketa na optogenetics, ga - enyere aka igosipụta blọprint nke neuronal circuitry n’ohere microscopic, yana usoro nke itinye ihe ọmụma, njikọta na nchekwa n’ime ụbụrụ.

UTARA NDỊ ỌZỌ

Chia-Chien Chen mere ọgụgụ ahụ. Chia-Chien Chen, Ju Lu, na Yi Zuo dere ihe odide ahụ.

Okwu Nkwupụta Mmasị

Ndị na-ede akwụkwọ na-ekwupụta na e mere nchọpụta ahụ na enweghi mmekọrịta ọ bụla ma ọ bụ ego ma ọ bụ ego nke a pụrụ iwere dị ka ihe nwere ike ịmasị.

Nkweta

Onyinye aka (R01MH094449) sitere na Nlekọta Mba nke Ahụike Uche rue Yi Zuo.

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