Mehanizam nastanka masne jetre tijekom prijelaznog razdoblja u mliječnih krava

master's thesis

• Title (english): Mechanism of Fatty Liver Development during Transition Period in Dairy Cows
• Author: Roland Peša
• Mentor: Marko Samardžija (mentor)
• Mentor: Romana Turk (mentor)
• Committee member: Ivan Folnožić (predsjednik povjerenstva)
• Committee member: Romana Turk (član povjerenstva)
• Committee member: Marko Samardžija (član povjerenstva)
• Granter: University of Zagreb; Faculty of Veterinary Medicine; (Reproduction and Obstetrics Clinic); Zagreb
• Granter: University of Zagreb; Faculty of Veterinary Medicine; (Department of Pathophysiology); Zagreb
• Defense date and country: 2016-03-22, Croatia
• Scientific / art field, discipline and subdiscipline: BIOMEDICINE AND HEALTHCARE; Veterinary Medicine; Veterinary Clinical Sciences

Abstract

Najkritičnije razdoblje za metabolizam visokomliječnih krava je prijelaz iz suhostaja u fazu rane laktacije. Krave tijekom visoke gravidnosti unose veću količinu energije od one koja je stvarno potrebna njihovom organizmu, pa se zbog toga višak energije skladišti. Prva faza laktacije najkritičnija je faza u proizvodnom ciklusu mliječnih krava, jer je organizam opterećen do krajnjih fizioloških granica. U ovoj fazi razvija se NEB. U prvoj trećini laktacije krave, zbog NEB-a i pojačane mobilizacije masti, gube u tjelesnoj kondiciji, a mogu i oboljeti. Do uspostave pozitivnog energetskog statusa dolazi 8–10 tjedna nakon teljenja. U međuvremenu organizam mobilizacijom masti nastoji umanjiti energetski disbalans. Međutim, to predstavlja veliku mogućnost za narušavanje metaboličke ravnoteže i nastanak masne jetre.

Abstract (english)

The most critical period for metabolism of highly lactating dairy cows is the transition from dry period into the early stage of lactation. Cows during pregnancy have high input of energy than it is really needed for their organism, therefore, the excess of energy is stored. The first phase of lactation is the most critical period in the production cycle of dairy cows, because the organism is loaded to the extreme physiological limits. In this phase a NEB is developed. In the first third of lactation, due to the NEB and increased mobilization of fats, cows lose their body condition, and can be affected by diseases. A positive energy status is established 8-10 weeks after calving. Meanwhile, the organism tries to reduce energy disbalance by mobilisation of fats. However, this represents a great chance for disruption of metabolic balance and development of fatty liver.

• Keywords: gravidnost; laktacija; negativni energetski status; mobilizacija masti; masna jetra
• Keywords (english): pregnancy; lactation; negative energy status; fat mobilization; fatty liver
• Language: croatian
• URN:NBN: urn:nbn:hr:178:495438
• Study programme: Title: Veterinary Medicine; Study programme type: university; Study level: integrated undergraduate and graduate; Academic / professional title: doktor/doktorica veterinarske medicine (doktor/doktorica veterinarske medicine)
• Type of resource: Text
• File origin: Reformatted digital
• Access conditions: Open access
• Created on: 2017-07-12 10:00:57