Melanotan 2 Peptide Hmoov

Melanotan 2 Peptide Hmoovyog ib qho hluavtaws peptide compound feem ntau siv los tswj cov tawv nqaij pigmentation. Ntawm kev sib tshuam ntawm molecular biology thiab pharmacology, Melanotan II (CAS 121062-08-6) tau txais kev txaus siab thoob plaws hauv zej zog kev tshawb fawb dhau nws lub npe vim nws qhov tshwj xeeb ntawm kev ua haujlwm. Nws yog deb tshaj qhov yooj yim "tanning tus neeg sawv cev"; es, nws yog ib tug sophisticated tus yuam sij uas muab ib glimpse rau hauv lub complex receptor regulatory network nyob rau hauv tib neeg lub cev.

Hauv cov ntsiab lus, Melanotan II yog ib qho khoom sib txuas ntawm cyclic heptapeptide, tshwm sim los ntawm qhov tshwm sim ntawm -melanocyte- stimulating hormone ( -MSH) hauv tib neeg lub cev. Nws lub ntsiab lus tsis meej yog nyob rau hauv nws lub peev xwm los xyaum ua -MSH nrog cov qauv ruaj khov, ua kom melanocortin receptors (MCRs) hauv lub cev, tshwj xeeb tshaj yog MC1R, uas tswj cov tawv nqaij pigmentation. Txawm li cas los xij, nws qhov kev cuam tshuam txuas ntxiv dhau ntawm daim tawv nqaij. Nws kuj tseem cuam tshuam nrog lwm cov receptor subtypes hauv nruab nrab paj hlwb thiab cov ntaub so ntswg peripheral, tshwj xeeb tshaj yog MC4R, yog li qhib lub qhov rooj rau nws cov kev ua haujlwm ntau yam.

1.Solid-theem synthesis (cov txheej txheem tseem ceeb)
Cov txheej txheem tsim khoom tseem ceeb rau MT-II yogsolid-phase peptide synthesis (SPPS), ntiav Fmoc/tBu kev tiv thaiv zoo.

Cov kauj ruam tseem ceeb:

• Resin xaiv: Fmoc-Linker Amide AM resin, hloov qib 0.30-0.35 mmol/g
• Amino Acid Coupling: Coupling sequentially from C-terminus to N-terminus, using HBTU/HOBt/DIEA or HCTU/NMM as coupling reagents.
• N-Terminal Acetylation: Thaiv N-terminus siv acetic anhydride thiab pyridine.
• Selective Deprotection ntawm Sab Chains: Tshem tawm Lys(Tfa) thiab Asp(OMe) tiv thaiv pab pawg siv NaOH/dioxane system.
• Resin Cyclation: Tsim cov qauv cyclic ntawm lactamation, nrog HATU raws li tus neeg nyiam condensing.
• Cleavage: Tshem tawm cov peptide los ntawm cov cob siv TFA sib tov (TFA: dej: anisole:EDT=92.5: 2.5:2.5:2.5).
• Kev huv huv: Ob-theem HPLC purification (polymer matrix kem + thim rov qab-theem silica kem), ua raws li kev hloov pauv acetate.
• Lyophilization: Tau txais cov hmoov dawb, xoob xoob.

Cov txheej txheem nyuaj: Aspartic acid side reactions yog lub ntsiab kev teeb meem. Lub tswv yim optimized siv HCTU/NMM coupling thiab stepwise synthesis, uas txo cov byproducts.

2. Kua-phase synthesis (lwm txheej txheem)

A fully liquid-phase synthesis method for MT-II was first reported in 2008, using a [(2+2)+1+1] fragment assembly strategy, achieving an overall yield of 2.6% and product purity >90% (tsis tas yuav tsum tau npaj chromatography). Txoj kev no zam cov teeb meem ntawm kev siv HF tshuaj lom heev lossis kim tshwj xeeb tiv thaiv pab pawg hauv cov khoom sib xyaw-theem synthesis, ua rau nws haum rau kev npaj loj -.

Q1: Nws siv sijhawm ntev npaum li cas rau cov nyhuv tanning ntawm MT-II kom pom tseeb?

Cov kev tshawb fawb soj ntsuam thiab cov neeg siv cov ntaub ntawv qhia pom tias:

Pom pom pigmentation pib: 5-7 hnub ntawm kev siv tas li

Tag nrho cov nyhuv: 2-4 lub lis piam (cov nyhuv cumulative)

Sijhawm tom qab txiav tawm: Lub lis piam mus rau hli

Qhov tseem ceeb ntawm tus kheej sib txawv muaj nyob rau hauv cov nyhuv; Cov tib neeg uas muaj cov tawv nqaij photosensitive I-II (cov tawv nqaij ncaj ncees, nyiam tshav ntuj) tau txais txiaj ntsig tseem ceeb tshaj plaws.

Q2: Puas yog MT-II xav tau UV?

Tsis yog. MT-II tuaj yeem ua rau nws tus kheej induce melanin synthesis yam tsis muaj UV raug. Txawm li cas los xij, qhov tsim nyog UV raug (hnub da dej lossis tanning txaj) tuaj yeem txhim kho thiab ua kom cov nyhuv tanning. Nws yog ib qho tseem ceeb uas yuav tsum nco ntsoov tias MT-II tsis tuaj yeem hloov lub hnub tiv thaiv- nws kwv yees qhov sib npaug ntawm SPF tsuas yog 2-4, deb tshaj qhov pom zoo SPF 30+.

Q3: Dab tsi ntxiv cuam tshuam MT-II muaj dua li tanning?

Vim nws tsis yog - xaiv receptor activation zog, MT-II kuj ua rau cov teebmeem hauv qab no:

Kev tswj hwm kev ua haujlwm ntawm kev sib deev: Induces spontaneous erection (1-5 teev tom qab kev tswj hwm hauv cov txiv neej), txhim kho libido (qhia hauv ob qho tib si poj niam txiv neej)

Kev tshaib plab: Ua kom tsis qab los noj mov los ntawm kev ua kom lub hypothalamus MC4R

Lwm tus: Qee cov neeg siv qhia kev qaug zog, yawning / stretching complex, thiab lwm yam.

Cov teebmeem no yog qhov sib txawv tseem ceeb ntawm melanotane II thiab melanotane I, thiab yog ib feem tseem ceeb ntawm nws cov kev mob tshwm sim.

Q4: Cov kev phiv ntawm melanotane II yog dab tsi?

• xeev siab, ntuav (dose-nyob, feem ntau)
• Facial flushing
• nkees nkees, tsaug zog
• Spontaneous erection (hauv cov txiv neej, yuav kav ntev li ob peb teev lossis tseem ua rau priapism)
• Nce ntshav siab