Utjecaj visoko-proteinske dijete na oksidacijski/antioksidacijski status

undergraduate thesis

• Title (english): The impact of high - protein diets on the oxidative/antioxidative status
• Author: Katarina Lovrić
• Mentor: Irena Landeka Jurčević (mentor)
• Granter: University of Zagreb; Faculty of Food Technology and Biotechnology; (Department of Food Quality Control); (Laboratory for Food Chemistry and Biochemistry); Zagreb
• Defense date and country: 2016-06-30, Croatia
• Scientific / art field, discipline and subdiscipline: BIOTECHNICAL SCIENCES; Nutrition

Abstract

Cilj ovog završnog rada bio je ispitati kako visoko-proteinska dijeta, odnosno proteini sirutke (Whey) u prehrani, djeluju na oksidacijski stres. Dokazano je da proteini sirutke pospješuju sintezu mišićnih proteina, potiču sagorijevanje masti, pojačavaju imunološki sustav, poboljšavaju osjetljivost na inzulin i smanjuju apetit. Dodatno, dokazano je da sirutka pospješuje proizvodnju glutationa - glavnog antioksidansa u našem tijelu, obzirom da su proteini sirutke bogati aminokiselinom cistein. Cistein sadrži tiolnu skupinu koja služi kao aktivno redukcijsko sredstvo u sprječavanju oksidacije te djeluje kao donor što rezultira povećanjem glutationa u stanici. Pojačana biosinteza intracelularnog glutationa je mehanizam odgovoran za povećanu sintezu mišića te poboljšanu sportsku izvedbu. Zbog jakog aminokiselinskog profila i lakoće apsorpcije, sirutka je nedvojbeno najpopularniji sportski dodatak prehrani.

Abstract (english)

The aim of this final thesis was to examine how a high-protein diet, respectively whey proteins (whey) in the diet, act on oxidative stress. It has been shown that whey proteins promote muscle protein synthesis, promote fat burning, enhance the immune system, improve insulin sensitivity and reduce appetite. In addition, it has been proven that whey stimulates the production of glutathione - the main antioxidant in our body, considering that the whey protein is rich in cysteine amino acid. Cysteine comprises a thiol group that serves as the active reducing agent in preventing oxidation and acts as the donor resulting in an increase of glutathione in a cell. Increased intracellular glutathione biosynthesis is the mechanism responsible for the increased synthesis of muscle and improved athletic performance. Because of the powerful amino acid profile and ease of absorption, whey is arguably the most popular sports supplement.

• Keywords: visoko – proteinska dijeta; oksidacijski stres; antioksidansi; cistein; glutation
• Keywords (english): high – protein diet; oxidative stress; antioxidant; cysteine; glutathione
• Language: croatian
• URN:NBN: urn:nbn:hr:159:048492
• Study programme: Title: Nutrition; Study programme type: university; Study level: undergraduate; Academic / professional title: sveučilišni/a prvostupnik/prvostupnica (baccalaureus/baccalaurea) nutricionizma (sveučilišni/a prvostupnik/prvostupnica (baccalaureus/baccalaurea) nutricionizma)
• Type of resource: Text
• File origin: Born digital
• Access conditions: Open access
• Created on: 2017-04-24 11:11:15