Utjecaj gena za BMP3 na trabekularne i kortikalne parametre dugih kostiju miša

master's thesis

• Title (english): The influence of the BMP3 gene on trabecular and cortical bone parameters of long bones in mice
• Author: Ivan Banovac
• Mentor: Lovorka Grgurević (mentor)
• Committee member: Slobodan Vukičević (predsjednik povjerenstva)
• Committee member: Zdravko Petanjek (član povjerenstva)
• Committee member: Lovorka Grgurević (član povjerenstva)
• Granter: University of Zagreb; School of Medicine; (Department of Anatomy and Clinical Anatomy); Zagreb
• Defense date and country: 2017-07-14, Croatia
• Scientific / art field, discipline and subdiscipline: BIOMEDICINE AND HEALTHCARE; Basic Medical Sciences; Anatomy

Abstract

BMP3 najučestaliji je BMP izoliran iz demineralizirane kosti i djeluje in vivo kao antagonist ostalih osteoinduktivnih BMP-ova. Istraživanje je provedeno na miševima s izbačenim genom za BMP3 oba spola, 2 i 4 mjeseca starosti. Miševi su genotipizirani i podijeljeni u skupine prema genotipu (WT i KO), dobi i spolu. Kosti miševa snimljene su ex vivo pomoću SkyScan 1076 mikro CT uređaja te je napravljena morfometrijska analiza trabekularnih i kortikalnih parametara distalnog femura i proksimalne tibije. Morfometrijskom analizom utvrđeno je da KO miševi imaju veći volumen kostiju (BV/TV) od WT miševa. Povećani BV/TV ustanovljen je u miševa obje dobne skupine i oba spola. Analizom je također utvrđeno da je povećanje koštanog volumena kortikalne kosti i debljine kortikalne kosti (Co.Th) kod KO životinja posljedica smanjenjene endostealne resorpcije pokazano jakom korelacijom endostealnog volumena (EV) s BV/TV. Povećanje koštanog volumena trabekularne kosti kod KO životinja posljedica je povećanja broja trabekula (Tb.N) i smanjenja razmaka između trabekula (Tb.Sp.) pokazano jakom korelacijom s BV/TV. Nije utvrđena značajna razlika u debljini trabekula (Tb.Th.) između KO i WT životinja što je potvrđeno slabom korelacijom s BV/TV.

Abstract (english)

BMP3 is the most abundant BMP in demineralised bone and antagonises other osteoinductive BMPs in vivo. The research was carried out on BMP3 knock-out mice of both sexes aged 2 and 4 months. After genotyping, the mice were divided into groups according to genotype (WT and KO), age and sex. The bones of the mice were recorded ex vivo using a SkyScan 1076 micro CT device and a subsequent morphometric analysis of trabecular and cortical parameters of the distal femur and proximal tibia was carried out. The morphometric analysis established that KO mice have higher bone volume (BV/TV) than WT mice. An increase in BV/TV was found in all groups of mice. The analysis also found that the increases in bone volume of cortical bone and cortical thickness (Co.Th) in KO mice were due to reduced endosteal resorption shown by a strong correlation between endosteal volume (EV) and BV/TV. The increase in bone volume of trabecular bone in KO mice was due to increased trabecular number (Tb.N) and decreased trabecular separation (Tb.Sp) shown by a strong correlation with BV/TV. No significant difference in trabecular thickness (Tb.Th) was found between KO and WT mice, confirmed by a weak correlation with BV/TV.

• Keywords: BMP3; trabekularna kost; kortikalna kost; mikro CT; morfometrijska analiza
• Keywords (english): BMP3; trabecular bone; cortical bone; micro CT; morphometric analysis
• Language: croatian
• URN:NBN: urn:nbn:hr:105:621605
• Study programme: Title: Medicine; Study programme type: university; Study level: integrated undergraduate and graduate; Academic / professional title: doktor/doktorica medicine (doktor/doktorica medicine)
• Type of resource: Text
• File origin: Born digital
• Access conditions: Open access
• Public note: Rad je nagrađen Rektorovom nagradom u akademskoj godini 2015./2016.
• Created on: 2017-11-13 07:47:35