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Peptidové inhibitory imobilizované na magnetické nosiče a Sepharosu aplikované na separaci žaludečních aspartátových proteinas / Peptide inhibitors immobilized on magnetic particles and Sepharose used for separation of stomach aspartate proteinases

IN ENGLISH Human gastric juice contains mainly aspartate proteinases: pepsin A and pepsin C. Both pepsins are produced by gastric mucosa as inactive pepsinogens and they are activated to the corresponding pepsins in the acidic environment of the gastric lumen. The levels of pepsinogens in serum reflect the morphological and functional status of gastric mucosa. A subject of this thesis is a part of a long-term investigation that focuses on the elaboration of methods for separation gastric aspartate proteainases that would be suitable for diagnostic purposes. The preparation of new type ligands was a concrete subject of PhD. thesis that after their immobilization they can enable the separation of aspartate proteinases. Four heptapeptides containing D-leucinyl residue were synthetized (Val-D-Leu-Pro-Phe-Phe-Val- D-Leu, Val-D-Leu-Pro-Tyr-Phe-Val-D-Leu, Val-D-Leu-Pro-Tyr-Tyr-Val-D-Leu and Val-D- Leu-Pro-Phe-Tyr-Val-D-Leu. The prepared heptapeptides immobilized on agarose magnetic particles were used for the study of their interaction with porcine pepsin A and rat pepsin C. While porcine pepsin A was adsorbed to all heptapeptides immobilized to magnetic particles, rat pepsin C was not retarded. Similar results were obtained using heptapeptides immobilized to Sepharose. The situation was more complicated...

Identiferoai:union.ndltd.org:nusl.cz/oai:invenio.nusl.cz:338086
Date January 2014
CreatorsRajčanová, Michaela
ContributorsKučerová, Zdenka, Fusek, Martin, Pacáková, Věra
Source SetsCzech ETDs
LanguageCzech
Detected LanguageEnglish
Typeinfo:eu-repo/semantics/doctoralThesis
Rightsinfo:eu-repo/semantics/restrictedAccess

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