ALL libraries (COBIB.SI union bibliographic/catalogue database)
-
Sinteza in vrednotenje derivatov toloksatona z vinilsulfonom kot kovalentno bojno glavo = Synthesis and evaluation of toloxatone derivatives with vinyl sulfone as a covalent warhead : Masterʼs Study Programme Industrial PharmacyRajk, LukaTarčni kovalentni zaviralci so spojine, ki s kovalentno vezavo na encim zavirajo njegovo delovanje. Kovalentna vez se vzpostavi med nekatalitičnim aminokislinskim ostankom v encimu in elektrofilno ... funkcionalno skupino kovalentnega zaviralca. Tarčne kovalentne zaviralce običajno načrtujemo s pripenjanjem elektrofilnih bojnih glav na že znane reverzibilne zaviralce. Monoamin oksidaza (MAO) je flavoencim, ki se nahaja na zunanji mitohondrijski membrani in katalizira deaminacijo aminov. Pri ljudeh poznamo dve izoformi MAO, in sicer MAO-A in MAO-B, ki imata 70 % strukturno podobnost, razlikujeta pa se po velikosti in obliki aktivnega mesta ter substratih, ki jih metabolizirata. Selektivno zaviranje encima MAO-A želimo doseči predvsem pri zdravljenju depresivnih stanj, ki so posledica pomanjkanja seratonina in noradrenalina. V sklopu magistrske naloge smo načrtovali in sintetizirali ireverzibilne selektivne zaviralce encima MAO-A, pri čemer smo kot osnovni skelet uporabili strukturo učinkovine toloksaton, ki je znan reverzibilen zaviralec MAO-A. S pripenjanjem vinil sulfonskega fragmenta kot elektrofilne bojne glave na ogrodje toloksatona smo želeli doseči kovalentno ireverzibilno vezavo s cisteinoma Cys321 in Cys323, ki se nahajata v bližini aktivnega mesta encima MAO-A in sta dokazano dobra nukleofila. Za pripravo derivatov toloksatona smo uporabili večstopenjsko sintezo, ki je obsegala šest sinteznih korakov, pri kateri sta bila ključna ciklizacija do oksazolidin-2-onskega obroča in oksidacija sulfida. Sintetizirali smo meta in para položajne izomere ter jim nato v biokemijskem testiranju na izoliranih rekombinantnih humanih MAO-A in MAO-B določili zaviralno aktivnost. Uspešno smo sintetizirali 6 končnih spojin (10, 14, 16, 18, 21 in 22). Najboljšo zaviralno aktivnost na MAO-A med načrtovanimi potencialno kovalnetnimi zaviralci je pokazala spojina 10 (IC50 = 32,66 % 3,03 %M), ki v svoji strukturi vsebuje vinil sulfonski fragment na para mestu glede na oksazolidin-2-onski obroč. Dobre zaviralne lastnosti sta pokazali tudi spojini 21 in 22, ki pa imata elektrofilni fragment nadomeščen z metilno skupino. Za spojino 10 smo s testoma časovne odvisnosti zaviranja in testom reverzibilnosti pokazali, da ne deluje kot kovalenten, ampak kot nekovalenten reverzibilen zaviralec MAO-A.Type of material - master's thesis ; adult, seriousPublication and manufacture - Ljubljana : [L. Rajk], 2021Language - slovenianCOBISS.SI-ID - 49239555
Author
Rajk, Luka
Other authors
Sosič, Izidor |
Knez, Damijan, farmacevt
Topics
Farmacevtska kemija |
tarčni kovalentni zaviralci |
MAO-A |
monoamin oksidaza A |
monoamin oksidaza B |
derivati toloksatona |
vinil sulfonska bojna glava |
ireverzibilni zaviralci
![loading ... loading ...](themes/default/img/ajax-loading.gif)
No library within the COBISS.SI system holds a copy of this material (e-resource or electronic version in addition to printed version).
![loading ... loading ...](themes/default/img/ajax-loading.gif)
![loading ... loading ...](themes/default/img/ajax-loading.gif)
![loading ... loading ...](themes/default/img/ajax-loading.gif)
Shelf entry
Permalink
- URL:
Impact factor
Access to the JCR database is permitted only to users from Slovenia. Your current IP address is not on the list of IP addresses with access permission, and authentication with the relevant AAI accout is required.
Year | Impact factor | Edition | Category | Classification | ||||
---|---|---|---|---|---|---|---|---|
JCR | SNIP | JCR | SNIP | JCR | SNIP | JCR | SNIP |
Select the library membership card:
If the library membership card is not in the list,
add a new one.
DRS, in which the journal is indexed
Database name | Field | Year |
---|
Links to authors' personal bibliographies | Links to information on researchers in the SICRIS system |
---|---|
Rajk, Luka | ![]() |
Sosič, Izidor | 30816 |
Knez, Damijan, farmacevt | 36438 |
Source: Personal bibliographies
and: SICRIS
Select pickup location:
Material pickup by post
Delivery address:
Address is missing from the member's data.
The address retrieval service is currently unavailable, please try again.
By clicking the "OK" button, you will confirm the pickup location selected above and complete the reservation process.
By clicking the "OK" button, you will confirm the above pickup location and delivery address, and complete the reservation process.
By clicking the "OK" button, you will confirm the address selected above and complete the reservation process.
Notification
Automatic login and reservation service currently not available. You can reserve the material on the Biblos portal or try again here later.
Subject headings in COBISS General List of Subject Headings
Select pickup location
The material from the parent unit is free. If the material is delivered to the pickup location from another unit, the library may charge you for this service.
Pickup location | Material status | Reservation |
---|
Reservation in progress
Please wait a moment.
Reservation was successful.
Reservation failed.
Reservation...
Membership card:
Pickup location: