Ihe ndị Neurotrophic na Ọkpụkpụ Na-arụpụta Ihe na Nri (2009)

Neuropharmacology. Akwụkwọ edemede; dị na PMC 2010 Jan 1.

E bipụtara na ụdị edetu ikpeazụ:

PMCID: PMC2635335

NIHMSID: NIHMS86817

Mbubre ọhụụ nke onye bipụtara edemede a dị na Neuropharmacology

Hụ ihe ndị ọzọ na PMC na ebe isiokwu e bipụtara.

Gaa:

nkịtị

Ọgwụ nke mmetọ a na-ebute mmetụta dị ukwuu na nhazi nke ọrụ neurons n'ụgwọ ọrụ ụbụrụ, a kwenyere na mgbanwe ndị a na-ebute ụdị omume ogologo oge na-emetụta ihe iri mmadụ ahụ. Agbanyeghị na usoro intracellular nke na-ahazi ihe gbasara sistem nke neurons nke ọma, ihe akaebe na-egosi na ọrụ dị oke mkpa maka ntinye akwara neurotrophic nke na - apụta mgbe nchịkwa ọgwụ na - adịghị ala ala. Bratrophic Brain na-enweta ihe (BDNF), ihe na-abawanye ụba na ụbụrụ ma na-achịkwa ọtụtụ ọgwụ ọjọọ, na-achịkwa phosphatidylinositol 3′-kinase (PI3K), protein mitogen-activated kinase (MAPK), phospholipase Cγ (PLCγ) na nuklia ihe kappa B (NFκB) na-edenye ụzọ, nke na-emetụta ọtụtụ ọrụ ọrụ cellular gụnyere nlanarị nke mkpụrụ ndụ, uto, ọdịiche, na ihe owuwu. Nyocha a na-atụle ọganihu ndị na-adịbeghị anya banyere nghọta anyị banyere otú BDNF na ụzọ mgbaàmà ya si edozi usoro arụmọrụ na omume na ọnọdụ nke ọgwụ riri ahụ.

1. Okwu Mmalite

Akụkụ dị mkpa nke ọgwụ riri ahụ bụ na mmadụ na-aga n'ihu na-eji ọgwụ ọjọọ eme ihe n'agbanyeghị oke egwu nke nsonaazụ anụ ahụ ma ọ bụ nke mmekọrịta mmadụ na ibe ya. Agbanyeghi na amaghi nke oma ihe mere eji eme omume ndia, na aghotaghari ya na mgbanwe di iche iche na abia na mmeghari ugwo a di nma.Nyocha 1). Karịsịa, mmegharị na dopaminergic neurons nke mpaghara ventral tegmental mpaghara (VTA) na ebumnuche ha neurons na nucleus accumbens (NAc) na-agbanwe ihe mmadụ na-aza maka ị drugụ ọgwụ na ụgwọ ọrụ okike, na-eduga ịnagide ọgwụ, ịkwụghachi ụgwọ ụgwọ, mgbaru nke ị drugụ ọgwụ ọjọọ, yana imesịa ịmanye ya (Everitt et al., 2001; Kalivas na O'Brien, 2008; Koob na Le Moal, 2005; Nestler, 2001; Robinson na Kolb, 2004).

Nyocha 1 

Majordị sel dị iche iche dị na okirikiri nke ọgbụgba ahụ na-emetụta ihe ndị metụtara ahụ

Emeela nnukwu mbọ n’ime afọ ndị na-adịbeghị anya iji chọpụta mgbanwe mkpụrụ ndụ na akwara na-eme n’oge mgbanwe site na iji ọgwụ mbụ ebuga na oriri a manyere. N'etiti ọtụtụ ụdị mmegharị ọgwụ eji eme ka ọgwụ pụta, a tụpụtala ka mgbanwe na neurotrophic factor (BDNF) sitere na ụbụrụ, ma ọ bụ neurotrophins metụtara, na ụzọ ha na-egosi akara na-agbanwe ọrụ nke neurons n'ime VTA-NAc sekit na mpaghara ụgwọ ọrụ ndị ọzọ iji gbanwee. Ihe kpaliri ịtivationụ ọgwụ ọjọọ (Bolanos na Nestler, 2004; Pierce na Bari, 2001). Isi ihe a na-eche maka ya bụ na mgbanwe uto nke ihe mkpụrụ ndụ na-ebute ma na-eme ka ihe na-agbanwe agbanwe na-apụta na mgbanwe nke mkpụrụ ndụ akwara. Dịka ọmụmaatụ, nchịkwa mkpali na-adịghị ala ala na-abawanye njigide nke dendarite na ọnụ ọgụgụ nke dendritic spines ma na-emewanyewanye BDNF n'ọtụtụ mpaghara ụgwọ ọrụ ụbụrụ, ebe nchịkwa opiate na-adịghị ala ala belata dendritic branching na spines yana ọkwa BDNF n'akụkụ ụfọdụ nke otu mpaghara (maka nyochaa lee (Robinson na Kolb, 2004; Thomas et al., 2008). Ọzọkwa, morphine na-adịghị ala ala na-ebelata oke nke VTA dopamine neurons, mmetụta nke gbanwere site na BDNF (Russo et al., 2007; Sklair-Tavron et al., 1996). Agbanyeghị, akaebe, ihe na-egosi na mgbanwe ndị a na-ewu ihe owuwu na-abawanye ụkọ.

Okwu dị na BDNF nwere ike ịbụ ihe metụtara sistemu vidiyo nke VTA-NAc na ụdị mgbakwunye kwekọrọ na akwụkwọ ọgụgụ buru ibu nke gosipụtara uto uto a na usoro iwu nke dendritic spines. Dịka ọmụmaatụ, ọmụmụ na-eji nhichapụ nke BDNF ma ọ bụ ihe nnabata nke TrkB na-egosi na achọrọ ha maka mmụba na ntozu nke spendering dendritic na imepe akwara dị iche iche yana idozi ma na - agbasa ọnya na neurons n'akụkụ ụbụrụ niile.Chakravarthy et al., 2006; Danzer et al., 2008; Horch et al., 1999; Tanaka et al., 2008a; von Bohlen Und Halbach et al., 2007).

Ọ bụ ezie na usoro mkpụrụ ndụ ihe ndị BDNF na-eji emezi ihe banyere ihe ụbụrụ ụbụrụ na-akwụ ụgwọ, ka amabeghị, ọmụmụ na-adịbeghị anya na-atụ aro na ụzọ ndị dị omimi nke BDNF na-agbanwe site na iji ọgwụ ọjọọ eme ihe, yana na mkpịsị ugodi ihe ndị a na-akpata neurotrophic na-agbanwe na-agbanwe na morphological na njedebe omume. - isi okwu n’arụ anụmanụ nke ọgwụ riri ahụ. Na nyocha a, anyị na-atụle ọganihu ọhụụ na nghọta anyị banyere otu opiates na mkpali na-esi edozi ihe ịrịba ama neurotrophic akara na nsonaazụ cellular na omume nke mmetụta ndị a. Anyị na-ebupute mpaghara maka nyocha ọdịnihu iji lebara mmetụta dị iche iche nke ihe mkpali anya ma na-emezi akwara neuronal na ụfọdụ omume phenotypes kwekọrọ na iri mmadụ ahụ.

2. Neurotrophin na-edenye ụzọ

Izochi uzo uzo na-eduga na ya na nmeghari neuronal development ma lanarị bu ihe ochicho ogologo oge nke nyocha akwara. Agbanyeghị, ihe ịrịba ama nke neurotrophic na sistemụ akwara isi (CNS) abanyela n'afọ iri gara aga ghọrọ mpaghara mmasị dị mkpa, ebe egosila na ọ bụ ihe ngosipụta neurotrophic gbanwere plastik na akwara akụkụ ndụ ya niile (maka ntụle hụ)Chao, 2003). Ihe mbu putara na neurotrophic choputara, ihe itolite akwara ure (NGF), kewaputara na 1954 (Cohen et al., 1954); Cloning nke usoro aka ya emeghị ruo 1983 (Scott et al., 1983). Ihe nchoputa a mere nke oma site na nhicha na njiri mara ihe ndi ozo dika odi NGF dika akowara ezi nkpuru nke neurotrophin: BDNF (Barde et al., 1982; Leibrock et al., 1989), neurotrophin-3 (NT3) (Hohn et al., 1990; Maisonpierre et al., 1990), na neurotrophin-4 / 5 (NT4 / 5) (Berkemeier et al., 1991). Ndị otu ezi-na-ụlọ Neurotrophin bụ paralogs ma keta oke njikọ (Hallbook et al., 2006); ha niile bụ polypeptides ndị na-eme ka ihe na-aga aga ma dị n'ụdị ha tozuru etozu na ndị tozuru etozu na CNS. Agbanyeghị na ọ dịla anya etinyere n'ụdị etolite ~ 13 kDa bụ mkpụrụ ndụ ihe nrịba ama, ọmụmụ emere n'oge gara aga gosiri na ụdị usoro akwara dị, na-ejigide N-terminus, na ụbụrụ (Fahnestock et al., 2001) na ịtụgharị akara cascades dị iche na peptides tozuru okè. Ihe omume nke NGF na CNS okenye ka akachasị mebere sel nke cholinergic na mpaghara isi ala, ebe nkesa nke neurotrophins ndị ọzọ na-agbasawanye.

A na - emepụta ihe nrịba ama nke mgbaàmà neurotrophin site na ngosipụta dị iche nke ndị na - anabata neurotrophin, nke enwere ike ikewapụ iche abụọ, njikọta metụtara tropomyosin (Trk) na p75 neurotrophin (p75NTR). Emere ka p75NTR buru ụzọ mata onye na-anabata NGF (Johnson et al., 1986), mana ejikọtara ya na ọmụmụ gbasara ọmụmụ etolite na ụdị neurotrophin anọ niile.Lee et al., 2001; Rodriguez-Tebar et al., 1990; Rodriguez-Tebar et al., 1992). N'adịghị ka p75NTR, ezinụlọ nke Trk nke ndị na-anabata ihe na-ekpughere nkọwa maka ligands ya. Ihe nnabata nke TrkA na-ejikọ NGF (Kaplan et al., 1991; Klein et al., 1991), nnata nke TrkB na-ejikọ BDNF (Klein et al., 1991) na NT4 / 5 (Berkemeier et al., 1991), yana onye na - anabata TrkC na - ejikọ NT3 (Lamballe et al., 1991). Ọ bụ ezie na neurotrophins tozuru okè nwere mmekọrịta na-abawanye ụba maka ndị na-anabata Trk ma e jiri ya tụnyere ndị propeptides, ma ọmụmụ etolite etolite nwere ike jikọta p75NTR na mmekọrịta dị elu. Ọzọkwa, e gosipụtara p75NTR ka ọ na-etolite ebe obibi na ndị na-anabata Trk, ụlọ ọrụ ndị a na-anabata ihe na-egosipụta ịdị n'otu dịwanye elu maka ibe nwoke Trk ligand ma e jiri ya tụnyere homodimeric Trk.

Ndị na-anabata Trk bụ otu ihe nchekwa ncheta nke mpaghara ejikọtara njikọ mpaghara na mpaghara intracellular nwere ngalaba tyrosine kinase. Yiri ndị nnabata nnabata ndị ọzọ, Trk ndị na-anabata ya na-azaghachi na njikọ ligand, nke na-enye ohere maka trans-phosphorylation n'ime akụrụngwa iji mee ka ọrụ nnabata nke nnabata. Trans-phosphorylation na nsị tyrosine na mpaghara juxtamembrane yana na C-terminus na-ekepụta saịtị ndị mgbakwunye maka protein SH2 (Src homology 2) - ụdị njikọ "Src homology nwere protein (Shc), na phospholipase Cγ (PLCγ) ), n'otu n'otu. Ihe ntinye ntinye Shc na-ebute ụzọ ala nke na-edenye nsogbu nke na-eduga n'ịgba arụmọrụ protein kinase (MAPK) na phosphatidylinositol 3′-kinase (PI3K). Nkpali nke uzo MAPK gunyere ime ka nke kinsi n’ezie akara aka (ERK) mee ihe, ebe ijigide insulin receptor substrate (IRS) na - eduga n ’ime mkpochapu na ntinye nke PI3K ma mee ka mmeghasi nke ndi n’adata dika thymoma viral proto-oncogene (Akt) , makwaara dị ka protein kinase B (PKB). Phosphorylation na rụọ ọrụ nke PLCγ na-eduga n'ịkpụpụta inositol (1,4,5) triphosphate (IP3) na diacylglycerol (DAG) na mkpalite nke protein kinase C (PKC) na cellular Ca2+ okporo ụzọ. Illustzọ ụzọ mgbaàmà atọ a dị — PI3K, PLCγ, na MAPK / ERK — nke usoro nnabata nke nnabata Trk tinyere aka Nyocha 2. Ọ dị mma ịmara na enwere ihe akaebe nke ihe dị iche iche na - eme ka cascades atọ ndị a dabere na neurotrophin, ụdị nnabata, yana ike mgbaàmà na oge ọ ga - etinye (lee (Segal, 2003). Ọrụ dị iche nke ụzọ ndị a dị n'okpuru ala yiri ka ọ dabara adaba maka mgbanwe mgbanwe ọgwụ ọjọọ mere na nkwonkwo akwara ozi na akparamaagwa, dị ka a ga-akọwapụta ya na ngalaba nke nyocha a.

Nyocha 2 

Zọ mgbaàmà intracellular dị n'okpuru ala nke neurotrophins

Tụnyere ihe ọmụma bara ụba banyere nsonaazụ nke nnabata onye nnabata nke Trk, amachaghị ihe banyere ọrụ nke ihe ịrịba ama nke P75NTR n'ọrụ ọrụ neurotrophin. Mgbapụta nke ndị na-eme ka ihe nkiri Trk na-eduga n'obe pro-nlanarị na akara ndịiche, ebe ịgbalite p75NTR na-ebido ma ụzọ nlanarị na ihe na - egosi ọnụnọ ọnwụ. Mgbapụta mgbapụta site na p75NTR chọrọ ngbanye Nuclear Factor kappa B (NFκB) nke a na-eche na ọ ga-arụ ọrụ na-enweghị nhịahụ site na TNF (tumor necrosis factor) ihe nnabata metụtara 4 / 6 (TRAF4 / 6) ma ọ bụ nnata na-emekọrịta mmekọrịta protein 2 (RIP2) (maka nyochaa lee (Chao, 2003). Ọ bụ ezie na mgbaàmà neurotrophin na-enye ohere maka ụdị akara dị iche iche dị mgbagwoju anya nke na-adabere n'ụkpụrụ ngosipụta nke neurotrophins na ndị na-anabata ya na nhazi nke peptides neurotrophin, nyocha a na-elekwasị anya na mgbanwe ọgwụ ọjọọ na-akpata na ụzọ mkpịsị ugodi neurotrophin na-agbadata n'ụzọ BDNF.

3. Mgbanwe ọgwụ ọjọọ na-akpata na BDNF na mpaghara ụbụrụ na-akwụghachi ụgwọ

Nyocha mgbanwe nke protein BDNF na mRNA ka enyochala n'ọtụtụ ụbụrụ na-esote njikwa nke ọtụtụ klas nke ihe na-eri ahụ. Stimulants na-amịpụta protein BDNF zuru ebe nile, na ntanetị mkpụmkpụ nke NAc, prefrontal cortex (PFC), VTA, na etiti (CeA) na basolateral (BLA) nuclei nke amygdala (Graham et al., 2007; Grimm et al., 2003; Le Foll et al., 2005). Ma adịghị agbanwe agbanwe (yabụ, anụmanụ ejikọtara onwe ha na-achịkwa ụmụ anụmanụ) nchịkwa cocaine na-ebute ọkwa dị elu nke protein BDNF na NAc (Graham et al., 2007; Liu et al., 2006; Zhang et al., 2002). N'otu aka ahụ, iwepụ ogologo oge ruo ụbọchị 90 mgbe nchịkwa onwe bụ coca na protein BDNF mụbara na NAc, VTA, na amygdala (Grimm et al., 2003; Pu et al., 2006), enwerekwa ihe akaebe na mmalite na usoro iwu epigenetic na bdnf enwere ike itinye aka na mgbasa ozi na ngbanwe aKumar et al., 2005).

Agbanyeghi na omumu ihe omumu ka nyochara BDNF mRNA na protein mgbe ekpughechara opiates, odi ka odi nke BDNF bu nke ndi opiates na-edozi. Nnukwu njikwa morphine na-abawanye ọkwa BDNF mRNA na NAc, medial PFC (mPFC), VTA, na orbitofrontal cortex. Na VTA, morphine na-adịghị ala ala, nke enyere site na ntinye subcutaneous (sc), na-akọ na ọ nweghị arụ ọrụ iji gbanwee mgbanwe BDNF mRNA (Numan et al., 1998). Ma nke a dị iche na mgbanwe na protein BDNF hụrụ mgbe ọgwụgwọ morphine na-adịghị ala ala. N'iji usoro onyunyo intraperitoneal (ip) morphine na-arịwanye elu, egosiri na ọnụ ọgụgụ sel BDNF immunoreactive na VTA belatara (Chu et al., 2007), na-atụ aro mbelata nke ọrụ BDNF. Ọ bụ ezie na enweghị akụkọ nyochara nkwupụta BDNF na hippocampus ma ọ bụ caudate-putamen (CPu) mgbe nchịkwa nke mkpali ma ọ bụ opiates, a na-enyocha ihe ọmụmụ ndị ahụ ebe ọ bụ na achọpụtara mgbanwe mgbanwe morphological na pyramidal neurons nke mpaghara XWCXXX nke hippocampal na obere spiny neurons (MSNs) nke CPu n'okpuru ọnọdụ ndị a ((Robinson na Kolb, 2004); lee Isiokwu 1).

Isiokwu 1 

Ọgwụ ịkpa ike na-agbanwe

4. Mgbanwe ọgwụ ọjọọ na-akpata na BDNF na-edenye ụzọ na mpaghara ụgwọ ọrụ ụbụrụ

Egosiwo ọtụtụ protein n'ime mkpụrụ ndụ akwara neurotrophin na-ahazi n’ime sistemụ mesolimbic site na opiates na mkpali; ndị a gụnyere mmetụta ọgwụ na IRS – PI3K – Akt, PLCγ, Ras – ERK, na akara ngosi NFκB (Nyocha 3). Stimulants na-abawanye phosphorylation ERK n'ọtụtụ mpaghara ụbụrụ, gụnyere NAc, VTA, na PFC, na-esochi nchịkwa ọgwụ ma ọ bụ nke na-adịghị ala ala (Jenab et al., 2005; Shi na McGinty, 2006, 2007; Sun et al., 2007; Valjent et al., 2004; Valjent et al., 2005). Nchoputa ndi a kwekọrọ na mmụba nke mkpalite ọnụ na akwara neuronal na ọnụọgụ nke spain, nke enyere Ras-ERK ọrụ guzosiri ike na oke nrị. Nsonaazụ nke opiates na akara ERK apụtachaghị ìhè. N’oge na-adịbeghị anya, a kọọrọla na ọgwụ ụbụrụ ERK na-ebelata na NAc (Muller na Unterwald, 2004), PFC (Ferrer-Alcon et al., 2004), na VTA (ihe ndị edepụtara edepụtara) mgbe ha nwesịrị morphine na-adịghị ala ala, mmetụta nke kwekọrọ na brandi neurite belata nke hụrụ na mpaghara ndị a na anụmanụ dabere na morphine. Agbanyeghị, ọrụ mbụ sitere na ndị otu anyị na ndị ọzọ kọrọ banyere ọrụ ERK na-arịwanye elu, gụnyere ịba ụba ERK phosphorylation na ọrụ catalytic, na VTA mgbe morphine na-adịghị ala ala (Berhow et al., 1996b; Liu et al., 2007; Ortiz et al., 1995). A choro omumu ihe omumu ndi ozo iji choputa nkowa a. Ọzọkwa, ọ dị mkpa iji ọtụtụ ụzọ ị ga-esi rụọ ọrụ protein iji mee ka ihe ọmụmụ ihe ọmụmụ ahụ nwee ike jikọtara ha na njedebe mmetụta. Dịka ọmụmaatụ, igbochi ERK na VTA dopamine neurons anaghị emetụta nha sel (Russo et al., 2007), ndị dị otú ahụ na ọmụmụ ga-eme n'ọdịnihu iji lebara mkpa ọrụ nke ọgwụ ọjọọ eme ka mgbanwe ọrụ ọrụ ERK na nke a na mpaghara ụbụrụ ndị ọzọ ka ha na-emetụta ihe ndị na-eri ahụ.

Nyocha 3 

Mmeghari na BDNF na egosiputa ugwo nke ejikọtara ya na opiate na mkpali na - eweta plastic plasticity na VTA-NAc

Ọtụtụ akụkọ na-adịbeghị anya gosipụtara na ọgwụ IRS – PI3K – Akt na-emetụta ọgwụ ọjọọ (Brami-Cherrier et al., 2002; McGinty et al., 2008; Muller na Unterwald, 2004; Russo et al., 2007; Shi na McGinty, 2007; Wei et al., 2007; Williams et al., 2007). Oge nchịkwa opiate na-ala ala belata Akt phosphorylation na NAc na VTA (Muller na Unterwald, 2004; Russo et al., 2007). Ngbanwe biochemical ndị a kwekọrịtara na mgbatị akwara ozi dendritic na dendritic spain ma ọ bụ, n'ihe gbasara VTA dopamine neurons, belatara otu mkpụrụ ndụ (Diana et al., 2006; Robinson et al., 2002; Robinson na Kolb, 1999b; Russo et al., 2007; Spiga et al., 2005; Spiga et al., 2003)

Nsonaazụ nke mkpali na akara IRS – PI3K – Akt na mpaghara ndị a edoghị anya. Dịka ọmụmaatụ, cocaine na-adịghị ala ala na-abawanye ọrụ PI3K na shei NAc ma belata ọrụ ya na NAc core (Zhang et al., 2006). Ihe omuma ndi a kwekọrọ na akuko ohuru nke gosiputara na cocaine na-egbu egbu na-eme ka ogo BDNF mRNA rute elu na mkpo NAc ma belata TrRB receptor mRNA di na NAc isi (Filip et al., 2006). Ya mere, enwere ike ịkọwa shei na isi ihe dị na ọrụ PI3K site na nhazi iwu dị iche iche nke BDNF na TrKB site na cocaine. Ọ dị mma ịmara na mgbe a na-eji ihe ndị ọzọ metụtara diski (gụnyere NAc na CPu), egosiri na amphetamine na-ebelata ọrụ Akt na nkwadebe synaptosome (Wei et al., 2007; Williams et al., 2007), anyị achọpụtawokwa ụdị mmetụta cocaine na-adịghị ala ala na NAc na-enweghị ọdịiche n'etiti isi na shei (Pulipparacharuvil et al., 2008). Na mgbakwunye, ọmụmụ ndị a gbagwojuru anya site na oge iji mụọ Akt mgbanwe mgbanwe, dị ka ọrụ McGinty na ndị ọrụ ibe mere n'oge na-adịbeghị anya na-egosi na amphetamine na-adịghị ala ala na-akpata ngbanwe na mgbanwe nuklia na Akt phosphorylation na Akat (McGinty et al., 2008). Na oge ngwụcha oge mgbe nchịkwa amphetamine enwere mmụba na - adịkarị na Akt phosphorylation, agbanyeghị, mgbe elekere abụọ Akt phosphorylation belatara, na-atụ aro usoro nkwaghari iji gbanyụọ ọrụ a. Understandghọta mmekọrịta dị omimi n'etiti mkpali na ntinye Akt ga-adị mkpa iji chọpụta ma ụzọ mgbaàmà a na - eburu plasticity na-akpali akpali na NAc, dịkwa ka ọ dị maka opiates na VTA (lee Nkebi 6).

Ntughari ihe emere na PLCγ na NFκB nke n’egosi uzo idi ire aghaa akwukwo dika ndi ERK na Akt; agbanyeghị, ọrụ na-adịbeghị anya gosiri na ọgwụ ụzọ nke abụọ adịghị achịkwa ụzọ abụọ ahụ. Oge nchịkwa nke morphine na-abawanye ngụkọta nke protein PLC as yana ọkwa nke ọrụ tyrosine-phosphorylated nke ọma.Wolf et al., 2007; Wolf et al., 1999). Ọzọkwa, a chọpụtara na ọgwụ mgbasa ozi PLCγ na-eme ka ihe gbasa gbasaa na VTA ka ọ na-abawanye ọrụ ERK na mpaghara ụbụrụ a (Wolf et al., 2007), si otú a na-egosipụta mmụba yiri ya na ọrụ ERK hụrụ mgbe morphine na-adịghị ala ala n'ọmụmụ mbụ (Berhow et al., 1996b). PLCγ imebiga ihe ókè na VTA na-achịkwa ụgwọ ọrụ opiate na omume mmetụta ndị metụtara ya, yana mmetụta dịgasị iche a hụrụ na rostral v caudal VTA (Bolanos et al., 2003). N'otu aka ahụ, Graham na ndị ọrụ ibe (Graham et al., 2007) hụrụ phosphorylation dị elu nke PLCγ na NAc na-esochi nnukwu nkịta, nke na-adịghị ala ala, na cocaine na-ejide onwe ya, mmetụta nke dabere na BDNF.

Ọmụmụ ihe ọmụmụ gara aga site na otu anyị gosipụtara na NFκB subunits p105, p65, na IκB abawanyele na NAc na nzaghachi nchịkwa cocaine na-adịghị ala ala (Ang et al., 2001). Nke a kwekọrọ nchoputa sitere na Cadet na ndị ọrụ ibe (Asanuma na Cadet, 1998), onye gosipụtara na methamphetamine na-akpali ọrụ NFκB na mpaghara ndị nwere nsogbu. Nyere na ufodu ogwu NFκB nke akwadoro ka o gha eme ihe iriba ama nke NFκB, ebe ndi ozo gbochiri ya, amabeghi na omumu omumu mbu a ma mgbanwe ahuru na protein na egosiputa mmụba ma ọ bụ ibelata ngbasa ozi NFκB. Anyi emebiela ajuju a n’oge na-adịbeghị anya site n’igosi na nchịkwa cocaine na-adịghị ala ala na-ebugharị ọrụ NFκB transcriptional na NAc, dabere na nchoputa na NFκB-LacZ transgenic reporter mice (Russo, Soc. Neurosci. Abstr. 611.5, 2007). Ihe akaebe ohuru gosiputara ozugbo na ntinye aka nke ngbasa ozi NFκB na NAc na mmetuta nke oru cocaine (lee Ngalaba 6). Ihe nchoputa mbu a bu ihe na - adọrọ adọrọ ma na - achokwa nyocha ọzọ tinyere nyocha nke nsonaazụ nke opiates na akara NFκB na mpaghara mpaghara ụbụrụ.

5. Ọkpụkpụ rọba rụrụ arụ na mpaghara ụbụrụ na-akwụghachi ụgwọ

Circuitlọ ọrụ ụbụrụ na-akwụ ụgwọ nke ụbụrụ esiziela iduzi ego mmadụ iji nweta ụgwọ ọrụ dị mma, mana ọgwụ ọjọọ nwere ike imerụ usoro a ma ọ bụ zoo ya. N'ime sekit a, a na-ahụkarị ihe eji arụ ọrụ bụ usoro dendrite ịkpụgharị ma ọ bụ ikpo okwu na mgbanwe na njupụta ma ọ bụ morphometry nke mkpụrụ osisi dendritic. Agbanyeghị na mkpa ọ dị dabere na mgbanwe mgbanwe agịga ahụ na-emetụta ahụike ka ka na-eme nyocha, ekwenyere na ọrụ synaptik na-ekpebi ọ bụghị naanị site na ọnụọgụ ahụ, kamakwa nha na ụdị nke ọkpụkpụ azụ ọ bụla. Dị ka ogwe etolite, ha na-ezipu irighiri akwara ndị na-eto eto nke na-ewere nke nnabata, multisynaptik, filopodial, ma ọ bụ nke akpọrọ (maka nyocha ga-ahụ (Bourne na Harris, 2007; Tada na Sheng, 2006). N'ime ụbụrụ okenye, n'okpuru ọnọdụ basal, a na-ekwu na ọ dịkarịa ala 10% nke spines nwere ụdị akabeghị aka ndị a na-atụ aro na plasticity bụ usoro na-aga n'ihu na ndụ niile (Fiala et al., 2002; Harris, 1999; Harris et al., 1992; Peters na Kaiserman-Abramof, 1970). Ihe owuwu ndi a di nkenke, ha nwekwara ike itolite n’ime nbido mkpali ma ghagide ogologo oge ole na ole.Holtmaat et al., 2005; Majewska et al., 2006; Zuo et al., 2005).

Ekwenyere na nkwanye ugwu nke na-adịte aka, akwara ngwa ngwa na nke na-adịgide adịgide ma na-arụ ọrụ na-esite na usoro na-arụ ọrụ (maka ntụle lee)Tada na Sheng, 2006). Usoro mkpali nke na-ebute ịda mba ogologo oge (LTD) nwere njikọta ma ọ bụ iweghachi azụ azụ na hippocampal na cortical pyramidal neurons (Nagerl et al., 2004; Okamoto et al., 2004; Zhou et al., 2004), ebe ntinye nke ike ogologo oge (LTP) metụtara njikọta nke spaines ọhụrụ yana ịmụba akwara azụ (dị adị)Matsuzaki et al., 2004; Nagerl et al., 2004; Okamoto et al., 2004). N'ihe omimi, a na-ekwenye na LTP na LTD na-ebute mgbanwe na ụzọ na-egosi akara, yana na njikọta na ịkọwapụta protein, na-emesịa gbanwee polymerization nke actin na-emetụta uto spine na nkwụsi ike ma mesịa mepụta akwara arụmọrụ (LTP) ma ọ bụ nkwụghachi azụ nke ọkpụkpụ azụ dị (LTD) (maka ntụle leeBourne na Harris, 2007; Tada na Sheng, 2006). N'elu ogwe, mkpụrụ osisi etolite etolite etolite etolite etolite etolite, ha nwere nnukwu postsynaptic (Harris et al., 1992Egosiputara na-anọgidesi ike na ọnwa (Holtmaat et al., 2005; Zuo et al., 2005). Mgbanwe ndị a na-egosi ihe omume ekwentị na-akwụsi ike nke nwere ike ịbụ nkọwa dị omimi ma ọ dịkarịa ala ụfọdụ mgbanwe omume ogologo oge metụtara ọgwụ riri ahụ.

Ọtụtụ klas nke ihe ndị na-eri ahụ, mgbe a na-achịkwa ya na oge, na-agbanwe plastik n'usoro ụbụrụ na-akwụ ụgwọ ụbụrụ niile. Ọtụtụ n'ime ọmụmụ ndị a bụ mgbanwe mmekọrịta na mmekorita nhazi nke ụbụrụ na ụbụrụ akọwapụtara nke nwere njiri omume phenotype na-egosi iri mmadụ ahụ. N'ime afọ iri gara aga, Robinson na ndị ọrụ ibe ya edugawo ụzọ n'ime ka ha ghọta otú ọgwụ ọjọọ si eme ihe na-achịkwa ihe owuwu (maka nyochaa)Robinson na Kolb, 2004). Kemgbe nleba anya izizi ndị a, ndị nchọpụta ọgwụ ọjọọ ndị ọzọ agbakwunyewo akwụkwọ a na-eto eto iji kpughee ihe ndị metụtara otu ọgwụ kpọmkwem na neuronal morphology. Dị ka e gosiri Isiokwu 1 na Nyocha 3, opiates na mkpali dị iche na-emetụta plasticity sistemu. Egosiputa ndi choputara ka ha belata onu ogugu dendritic spine na NAc MSNs na mPFC na hippocampus pyramidal neurons, ma belata onu ogugu soma nke VTA dopaminergic neurons, n’enweghi mmasi ya na neurons na adighi dopaminergic na mpaghara a.Nestler, 1992; Robinson na Kolb, 2004; Russo et al., 2007; Sklair-Tavron et al., 1996). Ruo ugbu a, enwere otu ihe dị na nchọpụta ndị a, ebe akọpụtara na morphine na-abawanye nọmba spain na orbitofrontal cortical neurons (Robinson et al., 2002). N'adịghị ka ndị opiates, e gosipụtara ihe mkpali dịka amphetamine na cocaine na-abawanye dendritic spines na mgbagwoju anya na NAc MSNs, VTA dopaminergic neurons, na PFC pyramidal neurons, na enweghị mkpesa nke nrụpụta plastik sistemụ.Lee et al., 2006; Norrholm et al., 2003; Robinson et al., 2001; Robinson na Kolb, 1997, 1999a; Sarti et al., 2007).

Ọ bụ ezie na sistemụ irighiri ihe na - agbadata na - egosi ihe na - eme ka ihe dị mma pụta, ọtụtụ n'ime mgbanwe ndị a na - esochi mgbanwe na ọkwa ma ọ bụ ọrụ nke protein a maara nke ọma iji hazie cytokealọn nke neuronal. Ihe ndị a gụnyere, mana ọnweghị oke, mgbanwe mgbanwe ọgwụ ọjọọ na microtubule metụtara protein 2 (MAP2), proteinfifiiki, protein protein cytoskeletal metụtara (Arc), LIM-kinase (LIMK), ihe myocyte na-akpata ihe na-akpata 2 (MEF2) , cyclin-kin kin s5 (Cdk5), postsynapti density 95 (PSD95), na cofilin, yana mgbanwe mgbanwe cycling cycling, na NAc ma ọ bụ mpaghara ụbụrụ ndị ọzọ ụgwọ ọrụ (Beitner-Johnson et al., 1992; Bibb et al., 2001; Chase et al., 2007; Marie-Claire et al., 2004; Pulipparacharuvil et al., 2008; Toda et al., 2006; Yao et al., 2004; Ziolkowska et al., 2005). Ebe ọ bụ na ọtụtụ mgbanwe mgbanwe biochemical na-akpata site na mkpali na morphine bụ otu, ọ ga-adị mkpa ịchọpụta iche iche sitere na opiate- na mkpali na-achịkwa mkpụrụ ndụ metụtara dendritic, ebe ha nwere ike inye nghọta banyere nsonaazụ ndị ọzọ nke opiate na mkpali na neurotrophic. plasticity nke ihe na-akpata

Ugha mgbanwe ndi a na ebubata ya na mpaghara ugwo site na opiates na ihe na - akpali akpali bu ihe ndi ozo n'ihi na ogwu abuo ahu na eme ka ha puta ihe. Iji maa atụ, usoro ọgwụgwọ a kapịrị ọnụ nke opiates na mkpali, ha abụọ na - ebute mmetụ nke locomotor na usoro ndị ọzọ na - agbatị nke nchịkwa ọgwụ ọjọọ, na - akpata mgbanwe ndị ọzọ na njupụta dendritic spain na NAc (Robinson na Kolb, 2004). Yabụ, ọ bụrụ na mgbanwe ndị a dị mkpa bụ ndị ọrụ mgbakwunye nke ihe riri ahụ, ma ha ga-enwerịrị akụrụngwa bidoroctional, ebe mgbanwe site na isi na akụkụ abụọ ahụ na-ebute otu omume ahụ, ma ọ bụ na-emegharị otu omume dị iche iche ma ọ bụ ihe ndị ọzọ na-ejideghị na ngwaọrụ nnwale ejiri. . Na ntinyeko, aghaghi ichoputa ihe nchoputa a bu ihe ndi ozo banyere ochicho ogwu. Na ihe omumu anyi, dika imaatu, anumanu na anata udiri anumanu di elu, na ewepu ya site na pellet implants, paradigm kweko na ntachi obi na nnabata. N'ụzọ dị iche, ọtụtụ ihe mkpali na-eji ọgwụ eme ihe otu ugboro ugboro kwa ụbọchị nke ọgwụ ahụ, na-enye ohere ọkwa ọbara ka ọ laa elu ma laghachi na ntọala tupu ọchịchị ọzọ, paradigms na-agbanwe agbanwe na nchebara echiche ọgwụ. Zọ mmadụ nwere ike isi mee ihe dịgasị iche iche site n'otu onye gaa n'ọzọ. Yabụ, ọmụmụ ihe ọdịnihu ga-adị mkpa idozi akparamagwa omume nke mgbanwe mgbanwe ọgwụ anwụ na-akpata na ụbụrụ na-akwụghachi ụgwọ n'ụdị usoro nke ọgwụ nchịkwa ọgwụ nke na-ekpughere mmadụ.

6. Ọrụ nke BDNF na akara ngosi ya na-ebubata ihe eji egbochi aru oru na akparamagwa

Mgbanwe mgbanwe ihe mgbapụta na-egosi na ọ bụ isi ihe na-emetụta ihe arụ ọrụ na omume plastic metụtara ọgwụ ọjọọ riri ahụ. Ọmụmụ ihe mmadụ nwere oke. A chọpụtala mgbanwe iji ọgwụ ọjọọ eme ihe na ọbara BDNF n'ime mmadụ riri ahụ, cocaine, amphetamine, mmanya, ma ọ bụ opiates (Angelucci et al., 2007; Janak et al., 2006; Kim et al., 2005), mana isi mmalite nke BDNF a, yana mkpa mgbanwe ndị a dị na mmalite na mmezi nke ihe riri ahụ ka edobeghị. Ọ ga - abụ ihe na - atọ ụtọ n'ọmụmụ ihe ọdịnihu iji nyochaa BDNF na ụzọ mgbaàmà ya na anụ ahụ ụbụrụ postmortem.

N'ime afọ iri gara aga, ọrụ n'ime akwara ehiwela ike nke BDNF na usoro dị iche iche nke usoro ihe riri ahụ. Nchoputa mbu gosiri gosiputara na BDNF ime obodo na VTA ma obu NAc augments locomotor ma nyeghachi onodu udiri ogwu na udiri akuko, ebe otutu BDNF na eweputa ihe ndi ozo.Hall et al., 2003; Horger et al., 1999; Lu et al., 2004). Ọrụ ndị na-adịbeghị anya gosipụtara na nchịkwa nchịkwa onwe cocaine na-abawanye akara BDNF na NAc (Graham et al., 2007). Na mgbakwunye, intra-NAc infusion nke BDNF nwere ikike nchịkwa nke cocaine na cocaine na-achọ na ịlaghachi azụ, ebe infusion nke mgbochi megide BDNF, ma ọ bụ mgbanaka mpaghara nke bdnf site na NAc (enweta site na ngosipụta nke nje recominase na ụmụ oke BDNF floffed), na-egbochi omume ndị a. Dabere na ọmụmụ ndị a, Graham na ndị ọrụ ibe (2007) kwubiri na mwepụta BDNF na NAc n'oge nnabata nke nchịkwa onwe cocaine bụ ihe dị mkpa na usoro ahụ riri ahụ.

Ihe omuma ndi a na-akwado echiche ahu na BDNF bu ihe ndi ochichi imeghari ka o ghazie ghazie ngbanwu mgbanwe nke NAc neurons nke ekpughere ekpomoku na cocaine ma obu ihe ndi ozo. Dị ka echiche a si dị, mmụba na-akpata mkpalite na BDNF na-egosi na NAc ga-eme ka mmụba nke mbipụta ọkụ nke NAc neurons, nke ga-eme ka azịza ihe omume banyere ndị na-akpali akpali yana ncheta metụtara ọgwụ ọjọọ siri ike maka nlọghachị na ihe riri ahụ. Dabere na hypothesis a bụ nchoputa sitere na neurons agbakwụnye, ebe e gosipụtara na BDNF zoro ezo na-eme ka njikọta protein dabere na mkpụrụ osisi nke dendritic spines.Tanaka et al., 2008b). Adịghị ike nke hypothesis a bụ na enwebeghị nnwale ọ bụla nke nyocha na mmelite nke spendant spines nke NAc neurons kwa se dị mkpa ma ọ bụ zuru oke maka azịza ọgwụ a ghọtara. N'ezie, enwere data na-atụ aro mmekọrịta dị omimi karịa n'etiti ihe abụọ ahụ: mgbochi nke Cdk5 na NAc na-egbochi ike nke cocaine na mkpụrụ ndụ dendritic na NAc neurons, n'agbanyeghị eziokwu ahụ na mgbochi dị otú ahụ na-eme ka a kwụsịlata na azịza na-akwụghachi ụgwọ maka cocaine (Norrholm et al., 2003; Taylor et al., 2007). N'ụzọ doro anya, a chọkwuru ọrụ iji mụọ njikọ dị n'etiti sistemu na nhazi a.

Ihe ọzọ dị mkpa banyere echiche a bụ na mgbanwe na BDNF na-egosi nwere ike ịmetụta mmetụta dị iche iche na akwara ozi na akparamaagwa dabere na mpaghara ụbụrụ. Nkwupụta ndị na-adịbeghị anya adọtala ọdịiche doro anya n'etiti ọrụ BDNF na hippopsalus na VTA (Berton et al., 2006; Eisch et al., 2003; Krishnan et al., 2007; Shirayama et al., 2002): BDNF infusions dị na hippofapatus bụ antidepressant-like, ebe infusions nke BDNF dị na VTA ma ọ bụ NAc na-ebute nsonaazụ prodepressant. Similarkpụrụ yiri ya na-apụta n'ọhịa ahụ riri ahụ. Dika odi,, BDNF di elu na NAc na akwalite akuko cocaine.Graham et al., 2007; Horger et al., 1999), mana na PFC BDNF na-ebelata otu omume a (Berglind et al., 2007). Ọ bụghị ihe ịtụnanya, ịmalite BDNF site na cocaine na-achịkwa usoro dị iche iche na mpaghara ụbụrụ abụọ a, usoro nke ga - eme ka ọdịiche nke omume dịkwuo (Fumagalli et al., 2007).

Ihe akaebe nke mbu emetutaala ngbasa ozi NFκB na nhazi nke ihe eji eme ka cocaine na aru oru ma obu omume. Agbanyeghị na usoro a na-esite na mgbanwe ndị a sitere na amabeghị, ọrụ ndị gara aga gosiri na p75NTR, nke dị na NFκB, dị na synapse nakwa na ịgbalite p75NTR site na BDNF dị mkpa maka LTD. Agbanyeghi na amụọla mmekorita nke BDNF-TrkB maka ị abuseụ ọgwụ ọjọọ, data ndị a na-atụ aro ụzọ ọzọ site na NFκB nke na-akwado nyocha ọzọ. N'ikwekọ na echiche a, anyị achọpụtala n'oge na-adịbeghị anya na mkparịta ụka nje na-agbagha nke ụzọ NF negativeB n'ụzọ na NAc na-egbochi ike nke cocaine na-adịghị ala ala iji mee ka njupụta nke spendine dendritic dị na NAc MSNs. Suchdị mgbochi nke NFκB na-emekwa ka ọfụma na mmetụta uto nke cocaine (Russo, Soc. Neurosci. 611.5, 2007). Ihe omuma a, n’adịghị ka ọnọdụ maka Cdk5 nke edepụtara n’elu, na-akwado njikọ dị n'etiti nkwụsi ike dendritic arborization na mmetụta omume na cocaine, na-ekwusi ike na ịdị mgbagwoju anya nke ihe omume ndị a na mkpa maka ọmụmụ ihe ọzọ.

Agbanyeghị na ọrụ dị mkpirikpi ekwuola mkpa ịdị mkpa nke ihe banyere neurotrophic akara na akparamagwa nke omume, ọrụ sitere na ụlọ nyocha anyị achọpụtala ọrụ maka BDNF na ụzọ ala IRS2-PI3K-Akt na usoro nke VTA dopaminergic sel nke na-esochi nkwụghachi ụgwọ ọrụRusso et al., 2007; Sklair-Tavron et al., 1996). Kpọsị, nchịkwa nchịkwa na-adịghị ala ala na akụrụngwa na-eweta ọnọdụ nke ịnagide ụgwọ ọrụ na ịdabere anụ ahụ n'oge oge mbupụrụ nke a na-eche na ọ ga-eso na ngbasawanye omume ị -ụ ọgwụ. Nchọpụta ndị mbụ gosiri na intra-VTA infusion nke BDNF na-egbochi mbelata morphine na nha VTA neuron (Sklair-Tavron et al., 1996). N’oge na-adịbeghị anya, anyị egosila na usoro iheomume nke ịnagide ụgwọ ọrụ, dị ka ịtụle ọnọdụ ọnọdụ chọrọ, na-egosi usoro iheomume nke sel sel dopaminergic belata na na ihe ịtụnanya ndị a bụ onye ogbugbo n’agha site na BDNF.Russo et al., 2007). Dịka anyị kwuru na mbụ, ụzọ akara biochemical na VTA nke na-agbada nke BDNF na onye na-anabata TrKB na-achịkwa ọdịiche dị na morphine na-adịghị ala ala: morphine na-eme ka PLCγ (Wolf et al., 2007; Wolf et al., 1999), wedata ọrụ nke ụzọ IRS – PI3K – Akt (Russo et al., 2007; Wolf et al., 1999), ma rụpụta nsonaazụ mgbanwe na ERK (lee anya). N'ihi ihe akaebe na-adịbeghị anya gosiri na Akt na-achịkwa oke nke ọtụtụ mkpụrụ ndụ na sistemụ akwara etiti (Backman et al., 2001; Kwon et al., 2006; Kwon et al., 2001; Scheidenhelm et al., 2005), anyị ji usoro mbufe usoro mkpụrụ ndụ viral gosipụtara gosipụtara na morphine na-arụpụta ntachi obi ụgwọ ọrụ site na mgbochi nke ụzọ IRS2 – PI3K – Akt na belata ogo nke VTA dopamine neurons. Achọpụtaghị mmetụta ndị a site na ịgbanwee nrịba ama ERK ma ọ bụ akara ngosi PLCγ, na-atụgharị aka na ịdị mkpa nke akara IRS – PI3K – Akt maka ihe ịtụnanya a. Ọmụmụ ihe ọmụmụ ga-aga n'ihu ga-eleba anya na mkpa BDNF na IRS – PI3K – Akt na-abawanye na nchịkwa nchịkwa nke opiate, ihe atụ metụtara ụlọ ọgwụ kachasị mkpa iji tụọ ihe riri ahụ. Nghọta ka ukwuu banyere mgbanwe mgbanwe dị elu na ihe ndị metụtara neurotrophic ma ọ bụ ndị na-anabata ha na ebumnuche Akt ga-edozi usoro a kapịrị ọnụ nke nnabata ụgwọ ọrụ na ihe riri ahụ. Ọzọkwa, ọ ga-adị mkpa ịghọta ọrụ nke ihe ịrịba ama nke BDNF na nhazi nke ọrụ VTA n'ime usoro okirikiri. Na nke a, ọ dị mma ịmara na Pu et al. (2006) gosiputara na ntughari site na nkpughe cocaine ugboro ugboro, synapses excitatory na dopamine neurons na VTA na-emeghachi omume na ịba ọcha n'anya site na mkpali na-adịghị ike, mmetụta nke chọrọ BDNF-TrkB endogenous.

7. Ọrụ nke ihe ndị ọzọ na-akpata neurotrophic na nrụpụta akụrụngwa na akụrụngwa na-akpata ọgwụ ọjọọ

Ọ bụ ezie na mkparịta ụka a dị n'elu lekwasịrị anya na BDNF yana cascades akara ya, enwere ihe akaebe na ọtụtụ ihe ndị ọzọ na-akpata neurotrophic na ụzọ mgbaàmà ha na-agbadata na-emetụta mmetụta omume ma ọ bụ nzaghachi nke biochemical maka ọgwụ ọjọọ. NT3, dika BDNF, egosiputara iji kwalite mmeghachi omume nke cocaine na ọkwa VTA (Pierce na Bari, 2001; Pierce et al., 1999). Nlekọta oge nke morphine ma ọ bụ cocaine na-achịkwa glial cell line-enweta ihe gbasara neurotrophic factor (GDNF) na sekit nke VTA-NAc, nke na-azụ ma na-egbochi mmetụta omume nke ọgwụ ọjọọ ndị a (Messer et al., 2000). Amphetamine na - ebute ihe mgbakwunye fibroblast bụ isi (bFGF) na sekit VTA-NAc na ụmụ oke bekee BFGF nwere mmeghachi omume na - enweghị isi na nkwụghachi azụ na - akpata site na injections ugboro ugboro (Flores et al., 2000; Flores na Stewart, 2000). Cytokine, ciliary neurotrophic factor (CNTF), nke na-achịkwa ozugbo na VTA, na-eme ka ikike nke cocaine na-akwalite mmeghachi nke biochemical na mpaghara ụbụrụ a; cocaine na-abawanye ihe mgbaàmà intracellular cascades site na Janus kinase (JAK) na ndị na - ebugharị ihe mgbaàmà na ndị na - eme ntụgharị (STAT), mmetụta nke sitere na nnukwu CNTF.Berhow et al., 1996a). Enwekwara ihe akaebe na morphine na-adịghị ala ala na-agbanwe ọkwa nke insulin-dị ka ihe na-akpata uto 1 (IGF1) na VTA na mpaghara ụbụrụ ndị ọzọ (Beitner-Johnson et al., 1992). Nchọpụta ndị a dịpụrụ adịpụ na-egosi na usoro dịgasị iche iche nke usoro neurotrophic na-achịkwa ọrụ VTA-NAc iji chịkwaa ọgwụ ndị a na-eji ọgwụ eme ihe n'ụzọ dị mgbagwoju anya ma gosipụta mkpa ọ dị maka nyocha dị ukwuu na mpaghara a.

8. Mkpebi

N'ime afọ iri gara aga, anyị emeela ka nghọta anyị dị ka ọgwụ ọjọọ eme ihe na-edozi ụzọ mgbaàmà neurotrophic na morphology nke neuronal dị iche iche na-enweta ụgwọ ọrụ ụbụrụ. Ọganihu njegharị na nso nso a na nnyefe mkpụrụ ndụ mkpụrụ akụ na-enye ohere maka njikwa ihe na - agbadata kpọmkwem na - agbada n'ime mpaghara ụbụrụ nke mmasị ụmụ anụmanụ tozuru etozu iji mụọ mmekọrịta dị n'etiti ị drugụ ọgwụ, morphology neuronal, na plasticity omume. Site na nje bicistronic viral vector, ọ ga - ekwe omume ịkọpụta protein nke na - eme ka ụzọ mkparịta ụka neurotrophic pụta yana protein protin na - eme ka ọhụụ nke neuronal morphology.Clark et al., 2002). Ya mere, site na iji usoro immunohistochemical dị mma iji kpoo ọnụ ọgụgụ neuronal ụfọdụ, ọ ga-ekwe omume ịtụle mgbanwe mgbanwe ọgwụ na-akpata na mmegharị biokemiiki na akara mkpịsị mkpịsị mkpịsị nke mkpụrụ ndụ, ya mere na-enye ozi dị mkpa maka usoro nchịkwa ọgwụ ụbụrụ na-akpata. mpaghara ụgwọ ọrụ. Iji ụzọ dị iche iche eme ihe na akparamagwa, ọmụmụ, biokemiiki, na nkụchi, ọ ga-esiwanye ike ịkọwa ụzọ iri ihe riri ahụ nke ukwuu, gụnyere ezigbo ọrụ nke akara mkpịsị ọgbụgba akwara na plastic ịdabere na ahụmịhe na usoro ahụ riri ahụ. Ihe omuma a nwere ike iduga mmepe nke ogwugwo ogwu ohuru iji meziwanye ihe ojoo nke ojoo site na iji ogwu eme ihe na mpaghara ugwo ma megharia usoro ahu riri ahu mmadu.

Ihe odide ala

Nkwupụta Nkwupụta Onye Nkwusa: Nke a bụ faịlụ PDF nke ihe odide a na-akwadoghị nke akwadora maka mbipụta. Dịka ọrụ nke ndị ahịa anyị, anyị na-enye nsụgharị mbụ nke ihe odide ahụ. Ihe odide a ga-enwe ngbanwe, nhazi, na nyochaa ihe kpatara ya tupu e bipụ ya na nke ikpeazụ ya. Biko rịba ama na n'oge mmepụta usoro njehie nwere ike ịchọta nke nwere ike imetụta ọdịnaya ahụ, ihe niile gbasara iwu na-emetụta akwụkwọ akụkọ ahụ.

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