3D imaging of the mitochondrial redox state of rathearts under normal and fasting conditions

作     者：He N.Xu Rong Zhou Lily Moon Min Feng Lin Z.Li 

作者机构：Department of Radiology Universityof PennsyluaniaPhilade lphiaPA 19104USA Briton Chance Laboratory of Redor Imaging Johnson Research FoundationDepartment of Biochemistry and Biophysics University of Pennsyluania Philade lphiaPA 19104USA Institute of Translational Medicine and Therapeutics Perelman School of Medicine University of Pennsylvania PhiladelphiaPA 19104USA 

出 版 物：《Journal of Innovative Optical Health Sciences》 (创新光学健康科学杂志（英文）)

年 卷 期：2014年第7卷第2期

页      面：60-69页

核心收录：

学科分类：0831[工学-生物医学工程（可授工学、理学、医学学位）] 1004[医学-公共卫生与预防医学(可授医学、理学学位)] 0808[工学-电气工程] 1002[医学-临床医学] 0809[工学-电子科学与技术（可授工学、理学学位）] 100201[医学-内科学(含：心血管病、血液病、呼吸系病、消化系病、内分泌与代谢病、肾病、风湿病、传染病)] 0805[工学-材料科学与工程（可授工学、理学学位）] 0836[工学-生物工程] 0702[理学-物理学] 10[医学] 

基　　金：supported by the Center of Magnetic Resonance and Optical Imaging(CMROn)--an NIH supported research resource P41RR02305(R.Reddy) 

主　　题：Mitochondion metabolism bioenergetics cardiomyocyte NADH flavoproteins Fp FAD caloric restriction food deprivation. 

摘      要：The heart requires continuous ATP availability that is generated in the *** using the cell culture and perfiused organ models have been carried out to investigate thebiochemistry in the mitochondria in response to a change in substrate supply,mitochondrialbioenergetics of heart under normal feed or fasting conditions has not been studied at the tissuelevel with a sub-millimeter spatial resolution either in vivo or er *** of many food-derived metabolites to generate ATP in the mitochondria is realized through the NADH/NAD+couple acting as a central electron *** employed the Chance redox scanner thelow-temperat ure fluorescence scanner to image the three-dimensional(3D)spatial distribution of themitochondrial redox states in heart tissues of rats under normai feeding or an overnight star-vation for 14.5 *** consecutive sections of each heart were imaged to map three redoxindices,i.e,NADH,oxidized favoproteins Fp,including flavin adenine dinucleotide(FAD)andthe redox ratio NADH/*** imaging results revealed the micro-heterogeneity and the spatial distribution of these redox *** quantitative analysis showed that in the fasted hearts thestandard deviation of both NADH and Fp,ie.,SD NADH and SDFp,significantly decreasedwith a p value of 0.032 and 0.045,respectively,indicating that the hearts become relatively morehomogeneous after *** fasted hearts contained 28.6%less NADH(p=0.038).No *** change in Fp was foumnd(p=0.4).The NADH/Fp ratio decreased with a marginalP value(0.076).The decreased NADH im the fasted hearts is consistent with the cardiac celsreliance of fatty acids consumption for energy metabolism when glucose becomes *** o bservation of N ADH decrease induced by dietary restriction in the heart at tissuelevel has not been reported to our best *** Chance redox scanner demonstrated thefeasibility of 3D imaging of the mitochondrial redox st ate in the heart and