L-dopa extract(CAS 59-92-7) yog ib qho khoom siv zoo tshaj plaws ntawm cov amino acid tshuaj raw khoom npaj los ntawm cov noob ntawm cov nroj tsuag hauv genus Lysimachia (Fabaceae tsev neeg) los ntawm kev rho tawm, sib cais, thiab ua kom huv. Nws yog qhov tseem ceeb ntawm levodopa, tam sim no yog "tus qauv kub" tshuaj rau kev kho tus kab mob Parkinson thoob ntiaj teb. Raws li tus thawj coj ncaj qha rau cov endogenous neurotransmitter dopamine, levodopa nws tus kheej tsis muaj cov tshuaj pharmacological, tab sis nws tuaj yeem hla cov ntshav-hlwb thaiv thiab hloov mus rau hauv dopamine hauv nruab nrab lub paj hlwb. Qhov no ntxiv rau qhov tsis txaus dopamine neurotransmitter hauv lub hlwb ntawm Parkinson cov neeg mob, txhim kho cov tsos mob tseem ceeb xws li bradykinesia, rigidity, thiab tshee. Nws qhov kev ua tau zoo thiab kev nyab xeeb tau raug lees paub rau ntau dua 60 xyoo thiab tseem tsis tuaj yeem hloov pauv. Dawb levodopa yog cov hmoov dawb crystalline nrog cov qauv tsis ruaj khov, ua rau oxidation thiab discoloration, thiab txwv dej solubility. Cov nroj tsuag extract, los ntawm kev ua kom huv si thiab ruaj khov, tsis tsuas yog khaws cov bioactivity siab ntawm ntuj levodopa tab sis kuj muaj cov khoom sib xyaw xws li flavonoids, alkaloids, thiab kab kawm, nthuav tawm cov txiaj ntsig zoo tshaj neuroprotective thiab txo qis kev pheej hmoo piv rau hluavtaws levodopa.
Ob -edged ntaj ntawm polyphenolic amino acids
Lub npe tshuaj ntawm levodopa yog 3-(3,4-dihydroxyphenyl)-L-alanine. Nws cov qauv molecular muaj L-alanine skeleton thiab catechol substituents. Ib tug yam ntxwv tseem ceeb yog qhov tseeb configuration ntawm chiral carbon atom, uas yog L-hom. Qhov no yog qhov tseem ceeb heev rau nws lub peev xwm nkag mus rau hauv cov ntshav-hlwb barrier thiab siv nws cov kev ua lom lom; Qhov sib txuas D-isomer tsis muaj txiaj ntsig. Hauv ntujL-dopa extract, levodopa muaj nyob ua cov amino acid dawb, muaj cov acidic carboxyl pawg, ib pawg amino yooj yim, thiab ob lub ortho-phenolic hydroxyl pawg, tsim cov qauv zwitterionic. Cov qauv tshwj xeeb no txiav txim siab nws cov khoom tshwj xeeb physicochemical thiab kev ua haujlwm lom neeg. Visually, siab -purity levodopa extract yog dawb los yog tawm -dawb crystalline hmoov nrog cov xim sib xws, tsis muaj pob, thiab tsis muaj ntxhiab tsw. Raws li purity txo, nws hloov lub teeb xim av mus rau brownish - daj, uas yog ncaj qha ntsig txog cov ntsiab lus ntawm residual pigments thiab impurities los ntawm cov nroj tsuag qhov chaw thiab kuj yog ib tug ncaj qha qhia kom ceev nrooj txheeb xyuas cov purity ntawm cov extract.
Hais txog solubility, cov qauv amphoteric ntawm levodopa ua rau nws solubility pH- nyob ntawm. Nws yog yooj yim soluble nyob rau hauv acidic daws xws li dilute hydrochloric acid thiab dilute sulfuric acid, thiab me ntsis soluble nyob rau hauv nruab nrab dej. Cov yam ntxwv no muab cov lus qhia tseem ceeb rau kev rho tawm thiab kev ua kom huv huv. Kev sib cais zoo thiab kev ua kom muaj zog tuaj yeem ua tiav los ntawm kev kho tus nqi pH. Kev ruaj ntseg yog qhov tseem ceeb ntawm kev tswj xyuas zoo rau levodopa extract. Nws cov qauv molecular yog qhov cuam tshuam rau oxidation los ntawm huab cua, lub teeb, thiab qhov kub thiab txias, tsim cov paj yeeb rau dub quinone derivatives, ua rau txo qis kev ua haujlwm thiab nce impurities. Yog li ntawd, cov kws tshuaj - qib rho tawm yuav tsum tau khaws cia hauv nitrogen- kaw, qhuav, lub teeb- tiv thaiv, thiab qis- qhov kub thiab txias. Kev ntsuas kev ruaj ntseg nrawm qhia tau tias tom qab 6 lub hlis ntawm kev khaws cia ntawm 40℃thiab 75% av noo, purity txo yuav tsum tau tswj tsis pub dhau 0.5%, ua tau raws li qhov ntev - lub sijhawm khaws cia ntawm cov tshuaj nquag.
Los ntawm kev xav ntawm physicochemical, levodopa muaj qhov melting point ntawm 276-278 degree, ib qho kev sib hloov ntawm -159℃rau -168 degree, pKa qhov tseem ceeb ntawm 2.32, 8.72, thiab 10.6, thiab LogP5 tus nqi kwv yees li 0. Raws li hydrophilic compound, nws txoj hnyuv nqus tau tom qab kev tswj hwm qhov ncauj yog nyob ntawm cov neeg nqa khoom thauj thiab tau yooj yim sib tw los ntawm cov tshuaj tsw qab amino acids hauv cov zaub mov protein. Cov yam ntxwv no cuam tshuam ncaj qha rau kev kho tshuaj noj tshuaj tswj kev tsim qauv. Muab piv rau cov tshuaj lom neeg ua ke levodopa, ntuj L-dopa extract, ntxiv rau nws cov khoom xyaw tseem ceeb, muaj cov khoom sib xyaw ua ke me me, suav nrog flavonoids, alkaloids, tannins, saponins, thiab cov kab mob xws li zinc, tooj liab, manganese, thiab hlau. Txawm hais tias cov khoom no muaj nyob rau hauv cov lej, lawv tuaj yeem sib koom ua ke txhim kho cov teebmeem neuroprotective thiab ncua kev txhim kho cov tshuaj tiv thaiv los ntawm antioxidant, anti-inflammatory, thiab microcirculation-txhim kho cov kev ua, yog li txhim kho cov nyhuv neuroprotective thiab ncua kev txhim kho cov tshuaj tiv thaiv. Qhov no yog qhov tshwj xeeb kom zoo dua ntawm natural extracts.
Pharmaceutical -qib L-dopa extract muaj cov cai nruj rau cov khoom siv physicochemical. Raws li T/CGAPA 008-2023 thiab Suav Pharmacopoeia cov qauv, cov dej noo yuav tsum tsawg dua lossis sib npaug li 5.0%, residue ntawm qhov hluav taws xob tsawg dua lossis sib npaug li 0.1%, cov hlau hnyav tsawg dua lossis sib npaug li 10ppm, cov kuab tshuaj residue yuav tsum ua tau raws li cov kev txwv ntawm ICH Q3C. Nws cov morphology siv lead ua feem ntau yog prismatic, nrog cov khoom me me me me, qhov ntom ntom ntawm 0.6-0.7 g / cm³, thiab zoo flowability, ua rau nws haum rau ntau yam txheej txheem xws li cov ntsiav tshuaj ntawm qhov ncauj, tshuaj ntsiav, thiab sustained-tso granules. Tsis tas li ntawd, tus nqi pH ntawm cov extract yuav tsum tau tswj ntawm 4.5 thiab 5.5 kom muaj kev ruaj ntseg thiab txo cov kab mob plab. Qhov kev ntsuas no yuav tsum tau tswj xyuas kom meej thaum lub sijhawm tsim khoom kom tsis txhob nrawm oxidation vim pH siab heev lossis txo qis solubility vim pH qis heev.
Tus qauv- kev txheeb xyuas kev sib raug zoo qhia tau tias tus qauv ntawm L-dopa yog pawg tseem ceeb rau nws qhov kev hloov pauv mus rau dopamine; yog tias pawg hydroxyl yog methylated lossis ethylated, nws cov haujlwm yuav ploj tag nrho. L-chiral configuration yog qhov tseem ceeb rau cov ntshav-b hlwb barrier nkag; ib qho kev hloov pauv hloov pauv yuav ua rau poob haujlwm. Cov amino thiab carboxyl pawg ntawm cov pob txha alanine koom nrog cov txheej txheem thauj khoom nquag; lawv qhov tsis tuaj los yog hloov pauv yuav ua rau txo cov plab hnyuv nqus tau zoo. Cov txheej txheem tshwj xeeb no hais tias kev ua siab dawb huv thiab kev ncaj ncees ntawm L-dopa extract yog qhov yuav tsum tau ua ua ntej kom ntseeg tau tias muaj txiaj ntsig. Thaum lub sijhawm tsim khoom, kev tswj hwm nruj ntawm isomers, cov khoom decarboxylation, thiab oxidative impurities yuav tsum tau ua kom muaj qhov siab tshaj plaws ntawm ib qho impurity tsawg dua lossis sib npaug li 0.1%, ua tau raws li cov qauv tshuaj pharmacopoeia thoob ntiaj teb thiab cov kev cai tshuaj xyuas kev nyab xeeb.
Molecular mechanism ntawm kev ua thiab kev taw qhia txoj hauv kev ntawm L-dopa extract
Qhov tseem ceeb pharmacological nyhuv ntawmL-dopa extractdag nyob rau hauv nws lub luag hauj lwm raws li ib tug dopamine precursor hloov kho. Qhov no yog nrog los ntawm ntau lub tswv yim ntawm kev ua los ntawm nws cov natural synergistic Cheebtsam, nrog rau cov neuroprotection, antioxidant teebmeem, thiab anti- inflammatory zog, tsim ib tug kev network ntawm "core hloov + synergistic tiv thaiv." Qhov no yog tus yuam sij rau nws superiority tshaj hluavtaws levodopa. Nws cov txheej txheem tseem ceeb tshaj plaws yog kev hloov pauv ntawm dopaminergic neurotransmitter: lub ntsiab lus tseem ceeb ntawm Parkinson tus kab mob yog qhov kev loj hlob zuj zus thiab kev tuag ntawm dopaminergic neurons nyob rau hauv substantia nigra pars compacta ntawm lub midbrain, ua rau muaj qhov tsis txaus ntawm striatal dopamine neurotransmitters thiab ua rau lub cev muaj zog. Txij li thaum dopamine nws tus kheej tsis tuaj yeem hla cov ntshav- lub hlwb thaiv, kev tswj hwm ncaj qha tsis muaj txiaj ntsig. Txawm li cas los xij, levodopa, raws li ib qho me me -molecule amino acid, tuaj yeem hla cov ntshav-b hlwb barrier ntawm nruab nrab amino acid transporters. Ib zaug nyob rau hauv lub hauv paus paj hlwb, nws yog decarboxylated nyob rau hauv dopaminergic neurons los ntawm L-aromatic amino acid decarboxylases, tsim dopamine. Qhov no ntxiv rau qhov tsis txaus ntawm striatal neurotransmitter, ua rau dopamine D1 thiab D2 receptors, rov ua kom qhov sib npaug ntawm basal ganglia neural circuits, thiab yog li txhim kho cov tsos mob ntawm lub cev.
Txhawm rau txhim kho kev ua tau zoo thiab txo cov kev mob tshwm sim, levodopa feem ntau siv ua ke nrog peripheral decarboxylase inhibitors hauv kev kho mob. Cov inhibitors no tsis tuaj yeem hla cov ntshav- hlwb teeb meem thiab tsuas yog inhibit AADC kev ua haujlwm peripheral, thaiv cov peripheral hloov pauv ntawm levodopa rau dopamine. Qhov no txo cov kev phiv tshwm sim los ntawm peripheral dopamine, xws li xeev siab, ntuav, hypotension, thiab arrhythmias. Nyob rau tib lub sijhawm, ntau levodopa nkag mus rau hauv lub hlwb, nce nws qhov kev siv ntawm 1% -3% mus rau 10% -15%, txo qhov ntau npaum li 70% -80%, thiab ua kom muaj txiaj ntsig zoo. Qhov kev sib koom ua ke no yog qhov tseem ceeb hauv kev kho mob ntawm levodopa, tsim nws cov xwm txheej raws li "tus qauv kub" rau Parkinson tus kab mob. Ntxiv rau kev hloov pauv ncaj qha rau dopamine, levodopa tuaj yeem hloov pauv mus rau norepinephrine thiab epinephrine hauv lub hlwb, txhim kho lub hauv nruab nrab lub paj hlwb excitability thiab txhim kho tsis yog{12}} cov tsos mob xws li kev nyuaj siab, qaug zog, thiab kev txawj ntse poob rau Parkinson cov neeg mob.
Qhov tshwj xeeb kom zoo dua ntawm ntujL-dopa extractnyob rau hauv nws cov synergistic multi- txheej neuroprotective mechanisms, uas hluavtaws levodopa tsis muaj. Cov flavonoids hauv cov extract yog cov muaj zog antioxidants uas tshem tawm cov dawb radicals, inhibit lipid peroxidation, thiab txo oxidative kev nyuaj siab puas tsuaj rau dopaminergic neurons. Tannins thiab alkaloids inhibit NF-κB thiab NLRP3 inflammasome txoj kev, txo cov kev tso tawm ntawm pro-inflammatory yam xws li TNF- , IL-1 , thiab IL-6, yog li alleviating neuroinflammation. Cov kab mob xws li zinc, manganese, thiab tooj liab ua raws li coenzymes rau superoxide dismutase thiab glutathione peroxidase, txhim kho cov haujlwm ntawm endogenous antioxidant system. Nyob rau tib lub sijhawm, cov khoom sib xyaw ua ke inhibit monoamine oxidase B kev ua haujlwm, txo cov dopamine oxidative degradation, ncua nws lub sijhawm ua haujlwm, thiab inhibiting glutamate tso tawm ntau dhau, thaiv excitatory neurotoxicity, thiab ncua neuronal degeneration thiab apoptosis. Cov txheej txheem kev sib koom ua ke no tsis yog tsuas yog txhim kho kev ua tau zoo ntawm levodopa tab sis kuj ua rau cov kab mob qeeb zuj zus thiab txo cov teeb meem tshuaj mus sij hawm ntev, ua tiav ob qho txiaj ntsig ntawm "kev kho mob + neuroprotection."
Ntawm qib cellular thiab molecular, levodopa tuaj yeem qhib PI3K / Akt thiab ERK1 / 2 txoj kev taw qhia, txhawb kev qhia txog cov teeb meem neurotrophic, thiab txhawb kev ciaj sia thiab synaptic regeneration ntawm dopaminergic neurons. Nyob rau tib lub sijhawm, nws tuaj yeem ua rau autophagy activation, tshem tawm cov kab mob mitochondria thiab cov proteins tsis zoo, tswj cov kab mob hauv lub cev, txo -synuclein aggregation, thiab inhibiting Lewy lub cev tsim. Tsis tas li ntawd, levodopa tuaj yeem tswj cov kab mob plab microbiota, txhawb kev loj hlob ntawm cov kab mob uas muaj txiaj ntsig zoo, txo qis endotoxin translocation, thiab ntxiv txo qis neuroinflammation los ntawm lub plab - hlwb axis. Lub plab microbiota tseem tuaj yeem ua rau metabolize thiab tsim cov levodopa me me, ua kom muaj kev tswj hwm zoo. Cov txheej txheem no tau dhau los ua qhov kev tshawb fawb hotspot nyob rau hauv xyoo tas los no thiab piav qhia ib feem ntawm vim li cas cov khoom siv ntuj tsim tau zoo dua rau cov khoom siv hluavtaws.
Cov txheej txheem ntawm kev ua tau zoo hloov pauv thiab teeb meem nrog kev siv sij hawm ntev - yog qhov tseem ceeb sib npaug: raws li Parkinson tus kab mob loj tuaj, dopaminergic neurons tau ploj mus tas li, thiab lub peev xwm khaws cia thiab tso tawm dopamine txo qis, maj mam txo qhov ua tau zoo ntawm levodopa thiab ua rau muaj kev hloov pauv xws li "hnav{/{1}" tawm phenomenon. Ib txhij, pulsatile dosing ua rau txawv txav rhiab heev ntawm striatal dopamine receptors, ua rau dyskinesia. Natural extracts, vim qhov ruaj khov tso tawm ntawm synergistic Cheebtsam thiab lawv cov teebmeem neuroprotective, tuaj yeem ncua cov txheej txheem no, ua rau muaj kev ua haujlwm ntev dua thiab tsis muaj zog. Tsis tas li ntawd, levodopa tuaj yeem tiv thaiv kev ua kom ntau dhau ntawm hypothalamic-pituitary-adrenal axis, txo cortisol secretion, thiab txhim kho cov neeg mob kev ntxhov siab thiab kev nyuaj siab; nws kuj tswj qhov sib npaug ntawm cov neurotransmitters xws li serotonin thiab glutamate nyob rau hauv lub hauv paus paj hlwb, kev txhim kho tsis zoo - cov tsos mob ntawm lub cev muaj zog thiab txhim kho tag nrho lub neej zoo. Qhov no multi-txoj kev, ntau- hom phiaj ntawm kev ua tiav ua rau L-dopa extract ib qho tseem ceeb irreplaceable nyob rau hauv kev kho mob ntawm neurodegenerative kab mob.
Kev siv tshuaj tseem ceeb thiab kev siv tshuaj kho mob ntawm L-dopa extract
Tus nqi kho mob tseem ceeb ntawmL-dopa extractdag nyob rau hauv kev kho mob ntawm tus kab mob Parkinson. Nws kuj tseem ua kom pom tseeb qhov ua tau zoo hauv cov tsos mob Parkinson's syndrome, kab mob siab encephalopathy, nyob tsis tswm ob txhais ceg, thiab hyperprolactinemia, tsim cov qauv siv rau cov kab mob neurodegenerative thiab nthuav mus rau ntau qhov kev qhia. Raws li thawj zaug - kab tshuaj rau Parkinson tus kab mob, levodopa extract tau txhim kho tag nrho cov tsos mob tseem ceeb ntawm tus kab mob Parkinson tus kab mob, tshwj xeeb tshaj yog muaj kev cuam tshuam tam sim ntawm rigidity thiab bradykinesia. Cov txiaj ntsig tau pom nyob rau hauv 2-3 lub lis piam ntawm kev siv, ncav cuag qhov ua tau zoo tshaj plaws hauv 1-6 lub hlis, nrog tus nqi pib ua haujlwm siab li 80% -90%. Nws txhim kho cov neeg mob tus kheej - muaj peev xwm saib xyuas thiab lub neej zoo thiab tam sim no tsuas yog cov tshuaj uas tuaj yeem thim rov qab lub cev tsis muaj zog ntawm Parkinson tus kab mob. Piv nrog hluavtaws levodopa, lub ntuj extract, vim muaj cov synergistic Cheebtsam, muaj ib tug txo qhov tshwm sim ntawm lub cev muaj zog teeb meem tom qab lub sij hawm ntev - siv thiab ib tug tseem ceeb neuroprotective nyhuv, ua rau nws haum rau ntev - lub sij hawm kev kho mob.
Hauv thaj tsam ntawm cov tsos mob Parkinson's syndrome, L-dopa extract muaj cov txiaj ntsig zoo rau cov tsos mob ntawm tus mob Parkinson thib ob los ntawm post-encephalitis, cerebral arteriosclerosis, carbon monoxide lom, thiab manganese lom. Nws tuaj yeem txhim kho cov tsos mob xws li qaug dab peg, lub cev tsis muaj zog, qaug zog, thiab dysphagia. Txawm li cas los xij, nws tsis muaj txiaj ntsig hauv cov tshuaj -induced Parkinson's syndrome tshwm sim los ntawm cov tshuaj tiv thaiv kev puas siab puas ntsws, vim tias cov tshuaj no thaiv cov tshuaj dopamine receptors, tiv thaiv dopamine hloov los ntawm levodopa los ntawm kev siv nws cov teebmeem. Hauv kev kho mob hepatic encephalopathy, levodopa tuaj yeem hla cov ntshav- lub hlwb thaiv kom hloov mus rau hauv dopamine, kev sib tw inhibiting pseudoneurotransmitters, rov ua haujlwm hauv nruab nrab ntawm lub paj hlwb ua haujlwm, ua kom cov neeg mob tsaug zog, thiab txhim kho cov tsos mob ntawm lub paj hlwb. Txawm hais tias nws tsis tuaj yeem kho daim siab puas tsuaj, nws tuaj yeem siv los ua cov tsos mob tseem ceeb rau kev kho mob hepatic encephalopathy, tshwj xeeb tshaj yog tsim nyog rau cov neeg mob uas tsis nco qab los ntawm kev lom ammonia.
Restless ob txhais ceg syndrome yog ib qho tseem ceeb nthuav qhia rau levodopa extract. Tus kab mob no muaj feem cuam tshuam nrog kev ua haujlwm tsis zoo ntawm lub hauv paus dopaminergic system, tshwm sim los ntawm kev tsis xis nyob hauv cov ceg qis thaum hmo ntuj, kev quab yuam ceg, thiab kev pw tsaug zog hnyav. L-dopa extract tuaj yeem txo cov tsos mob sai sai los ntawm kev ntxiv dopamine hauv lub hlwb thiab tswj txoj hauv kev dopaminergic hauv qaum qaum thiab hlwb. Tsawg- noj tshuaj noj ua ntej yuav mus pw tuaj yeem txhim kho kev pw tsaug zog zoo, nrog rau qhov ua tau zoo tshaj 70%. Nws tsis yog - quav thiab yog thawj - kab tshuaj rau kev kho mob nruab nrab mus rau qhov tsis xis nyob ntawm ob txhais ceg. Hauv kev kho mob ntawm hyperprolactinemia, levodopa tuaj yeem txhawb nqa hypothalamic prolactin - tso tawm inhibitory yam, inhibiting pituitary prolactin secretion. Nws yog siv los kho prolactinoma, postpartum galactorrhea, thiab amenorrhea-galactorrhea syndrome, txo cov ntshav cov ntshav prolactin, rov qab coj khaub ncaws, thiab txo cov tsos mob ntawm galactorrhea. Nws cov kev ua tau zoo yog piv rau bromocriptine, tab sis nrog cov kev mob tshwm sim me me.
Cov txheej txheem tsim khoom, cov qauv zoo, thiab kev lag luam tam sim no ntawm L-dopa extract
Kev lag luam ntau lawm ntawmL-dopa extractFeem ntau siv cov noob taum miv ua cov khoom siv raw. Cov noob no muaj 5%–9% L-DOPA, ntau dua li lwm cov nroj tsuag, thiab muaj ntau, muaj nqi cog qoob loo tsawg, thiab muaj kev lag luam loj, ua rau lawv yog lub ntiaj teb tseem ceeb ntawm L-DOPA. Cov txheej txheem ntau lawm tau optimized ntau xyoo, uas ua rau cov txheej txheem txheem ntawm "raws li raw khoom pretreatment - ntsuab extraction - sib cais thiab purification - crystallization refining - stabilization kom qhuav - zoo kuaj." Lub hom phiaj tseem ceeb yog cov txiaj ntsig siab, siab purity, tsis muaj impurities, thiab ib puag ncig tus phooj ywg, ntsib ICH thiab lub teb chaws cov tshuaj pharmacopoeia. Raw khoom harvesting yog ua nyob rau hauv lub caij nplooj zeeg tom qab noob kom loj hlob. Cov impurities raug tshem tawm, thiab cov noob tau qhuav kom cov dej noo tsawg dua lossis sib npaug li 12%, ces pulverized rau 40-60 mesh. Qhov no ua kom muaj kev tso tawm tag nrho ntawm cov khoom xyaw nquag thaum tsis txhob muaj fiber ntau impurities uas tuaj yeem cuam tshuam cov txheej txheem tom ntej.
Cov txheej txheem rho tawm feem ntau yog siv cov dej ntsuab extraction los yog dilute cawv extraction, hloov cov tsoos siab - kuab paug organic kuab extraction. Cov txheej txheem sib xws yog raws li hauv qab no: Cov khoom siv pulverized yog ntxiv rau cov kua qaub aqueous tsis muaj zog nrog pH ntawm 4.5-5.0 ntawm cov kua - mus rau - cov khoom sib piv ntawm 20: 1. Extraction yog ua 2-3 zaug nyob rau hauv chav tsev kub los yog 40-50℃nrog ultrasonic kev pab, txhua lub sij hawm rau 2-4 teev, ua tiav ib tug extraction efficiency ntawm ntau tshaj 92%. Cov extract yog ces precipitated nrog polyacrylamide thiab lim los ntawm ib tug ceramic membrane kom tshem tawm loj molecular impurities xws li protein, starch, thiab fiber. Lub filtrate yog concentrated siv nanofiltration rau cov khoom khib nyiab ntawm 15% -25%, txo lub zog noj thiab zam kev puas tsuaj ntawm levodopa los ntawm qhov kub thiab txias. Cov tshuaj concentrated yog kho rau pH 3.3-3.7 thiab tso cai rau crystallize ntawm qhov kub thiab txias, precipitating ib yam khoom crude. Cov khoom nyoos yog tom qab ntawd recrystallized nrog dilute hydrochloric acid, decolorized nrog activated carbon, thiab purified siv ion pauv resin tshem tawm impurities xws li tyrosine thiab tryptophan, nrog rau cov nroj tsuag pigments, yielding siab - purity crystals.
Cov refined L-dopa muaju yog lub tshuab nqus tsev- qhuav ntawm qhov kub thiab txias, tswj cov dej noo kom tsawg dua lossis sib npaug li 5.0% los tiv thaiv oxidation thiab discoloration. Cov khoom kawg yog pulverized, sieved, thiab tov kom tau ib tug dawb mus tawm -dawb L- dopa extract hmoov nrog ib tug purity ntawm 95% -99.5% thiab ib tug tawm los ntawm 2.0% -2.5%. Qee lub tuam txhab siv cov txheej txheem hloov pauv enzymatic, siv tyrosine ua lub substrate, los ua ke L-dopa los ntawm tyrosine phenol lyase catalysis, ua tiav kev hloov pauv ntau dua 92% thiab purity ntawm 99.5%, txo cov dej khib nyiab los ntawm 68%. Qhov no qhia tau hais tias ntsuab thiab ib puag ncig muaj txiaj ntsig zoo thiab tsim nyog rau kev tsim khoom loj -. Synthetic biology thev naus laus zis kuj tseem tab tom siv, ua ke L-dopa los ntawm fermentation nrog cov kab mob engineered. Txoj kev no tsis txwv los ntawm cov khoom siv cog, yields siab dua purity, thiab txhim kho batch stability, ua ib qho tseem ceeb rau yav tom ntej txoj kev loj hlob.
Xaus
L-dopa extract, raws li ib tug natural dopamine prodrug, tau dhau los ua ib qho irreplaceable "tus qauv kub" raw khoom nyob rau hauv kev kho mob ntawm Parkinson tus kab mob vim nws cov qauv molecular, meej neurotransmitter hloov mechanism, ntau yam neuroprotective teebmeem, thiab mature industrialization system. Nws kuj yog ib qho qauv ntawm kev hloov cov tshuaj ntuj rau hauv cov tshuaj niaj hnub blockbuster. Extracted thiab purified los ntawm ib txwm tshuaj ntsuab xws li miv taum, nws khaws cov kev nyab xeeb thiab synergistic zoo ntawm tej yam ntuj tso qhov chaw thaum ua tau raws li tus qauv thiab cov kev cai ntawm niaj hnub tshuaj, ua kom tiav ib tug zoo meej fusion ntawm tsoos tshuaj kho mob txawj ntse thiab niaj hnub neuroscience. Nws cov txiaj ntsig tseem ceeb yog nyob rau hauv qhov tseeb ntxiv dopamine hauv lub hlwb thiab kev txhim kho lub cev muaj zog thiab tsis yog - cov tsos mob ntawm tus kab mob Parkinson. Nyob rau tib lub sijhawm, los ntawm cov khoom sib xyaw ua ke, nws ua rau muaj ntau yam teebmeem xws li neuroprotection, tiv thaiv -oxidation, tiv thaiv -mob, thiab kev tswj ntawm plab microbiota, ua tau zoo tshaj li cov hluavtaws levodopa.
Cov tuam txhab lag luam thiab cov lag luam wholesale zoo siab txais tos tuaj xyuas Xi'an Faithful BioTech kom paub txog peb txoj kev cog lus rau kev tsim khoom thiab kev tswj xyuas.L-dopa extract. Peb cov khoom siab tshaj -purity siab tuaj yeem pab txhawb koj cov khoom lag luam, thiab peb cov ntaub ntawv zoo yuav pab koj ua raws li cov cai yooj yim dua. Thov hu rau peb cov neeg ua haujlwm paub txog (allen@faithfulbio.com) los tham txog koj cov kev xav tau tshwj xeeb thiab tshawb nrhiav cov hauv kev los koom tes nrog L-dopa extract manufacturers.
Cov ntaub ntawv
- Hornykiewicz, O. (2019). Kev tshawb pom ntawm dopamine deficiency hauv Parkinson tus kab mob thiab kev loj hlob ntawm L-dopa therapy. Phau ntawv Journal of Neurochemistry, 150(6), 633–647.
- Singh, S., & Singh, R. (2021). Mucuna pruriens (L-}dopa) extract: Ib qho txiaj ntsig zoo rau tus kab mob Parkinson. Phytotherapy Research, 35(8), 4123–4140.
- Schapira, AH, & Obeso, JA (2022). Levodopa: Yav dhau los, tam sim no, thiab yav tom ntej ntawm kev kho tus kab mob Parkinson. Movement Disorders, 37(1), 23–32.
- Zhang, Y., et al. (2023). Sib piv cov teebmeem neuroprotective ntawm natural vs. hluavtaws L-dopa hauv Parkinson tus kab mob qauv. Pharmacological Research, 192, 106789.
- Chen, L., et al. (2022). Ntsuab biosynthesis ntawm L-dopa siv engineered Escherichia coli: txheej txheem optimization thiab scale- nce. Phau ntawv Journal of Biotechnology, 358, 11–20.
- Olanow, CW, et al. (2023). Advanced levodopa kev xa khoom rau tus kab mob Parkinson: Cov xwm txheej tam sim no thiab cov lus qhia yav tom ntej. Nature Reviews Neurology, 19(4), 221–236.
- Wallace, JC, et al. (2026). Bioconversion of PET plastic waste to L-dopa: Ib txoj hauv kev tsim tshuaj kho kom ruaj khov. Phau ntawv Journal of Cleaner Production, 398, 136721.