Volume 50, Issue 2 pp. 541-551
Original Research

Integration of Neural Reward Processing and Appetite-Related Signaling in Obese Females: Evidence From Resting-State fMRI

Peng Zhang MD

Peng Zhang MD

Department of Radiology, Beijing Friendship Hospital, Capital Medical University, Beijing, China

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Yang Liu MD

Yang Liu MD

Department of General Surgery, Beijing Friendship Hospital, Capital Medical University & National Clinical Research Center for Digestive Diseases, Beijing, China

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Han Lv MD

Han Lv MD

Department of Radiology, Beijing Friendship Hospital, Capital Medical University, Beijing, China

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Meng-yi Li MD

Meng-yi Li MD

Department of General Surgery, Beijing Friendship Hospital, Capital Medical University & National Clinical Research Center for Digestive Diseases, Beijing, China

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Feng-xia Yu MD

Feng-xia Yu MD

Medical Imaging Center, Beijing Tongren Hospital, Capital Medical University, Beijing, China

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Zheng Wang MD

Zheng Wang MD

Department of Radiology, Beijing Friendship Hospital, Capital Medical University, Beijing, China

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He-yu Ding MD

He-yu Ding MD

Department of Radiology, Beijing Friendship Hospital, Capital Medical University, Beijing, China

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Li-xue Wang BS

Li-xue Wang BS

Department of General Surgery, Beijing Friendship Hospital, Capital Medical University & National Clinical Research Center for Digestive Diseases, Beijing, China

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Kai-xin Zhao BS

Kai-xin Zhao BS

Department of General Surgery, Beijing Friendship Hospital, Capital Medical University & National Clinical Research Center for Digestive Diseases, Beijing, China

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Zheng-yu Zhang MD

Zheng-yu Zhang MD

Department of Radiology, Beijing Friendship Hospital, Capital Medical University, Beijing, China

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Peng-fei Zhao MD

Peng-fei Zhao MD

Department of Radiology, Beijing Friendship Hospital, Capital Medical University, Beijing, China

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Jing Li MD

Jing Li MD

Department of Radiology, Beijing Friendship Hospital, Capital Medical University, Beijing, China

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Zheng-han Yang MD

Zheng-han Yang MD

Department of Radiology, Beijing Friendship Hospital, Capital Medical University, Beijing, China

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Zhong-tao Zhang MD

Corresponding Author

Zhong-tao Zhang MD

Department of General Surgery, Beijing Friendship Hospital, Capital Medical University & National Clinical Research Center for Digestive Diseases, Beijing, China

Address reprint requests to: Z.-c.W., Department of Radiology, Beijing Friendship Hospital, Capital Medical University, No. 95 Yong An Road, Xicheng District, Beijing, 100050, China. E-mail: [email protected] or Z.-t.Z., Department of General Surgery, Beijing Friendship Hospital, Capital Medical University & National Clinical Research Center for Digestive Diseases, No. 95 Yong An Road, Xicheng District, Beijing, 100050, China. E-mail: [email protected]Search for more papers by this author
Zhen-chang Wang MD

Corresponding Author

Zhen-chang Wang MD

Department of Radiology, Beijing Friendship Hospital, Capital Medical University, Beijing, China

Address reprint requests to: Z.-c.W., Department of Radiology, Beijing Friendship Hospital, Capital Medical University, No. 95 Yong An Road, Xicheng District, Beijing, 100050, China. E-mail: [email protected] or Z.-t.Z., Department of General Surgery, Beijing Friendship Hospital, Capital Medical University & National Clinical Research Center for Digestive Diseases, No. 95 Yong An Road, Xicheng District, Beijing, 100050, China. E-mail: [email protected]Search for more papers by this author
First published: 17 January 2019
Citations: 21
The first two authors contributed equally to this work.
Contract grant sponsor: National Natural Science Foundation of China; Contract grant numbers: 61527807, 81701644, 61801311; Contract grant sponsor: Beijing Municipal Administration of Hospital' Mission Plan; Contract grant number: SML20150101; Beijing Scholars Program; Contract grant number: [2015] 160; Contract grant sponsor: Beijing Natural Science Foundation; Contract grant numbers: 7172064; 7162048; 7182044; Contract grant sponsor: Beijing Municipal Administration of Hospitals (to Han Lv); Contract grant numbers: PX2018001, QML20180103; Contract grant sponsor: Beijing Friendship Hospital, Capital Medical University; Contract grant number: seed project YYZZ2017B01 (to Han Lv).

Abstract

Background

The reward-related regions have been considered a crucial component in the regulation of eating behavior. Furthermore, appetite-related regions associated with reward can influence eating behaviors through altered functional activity related to food in brain areas associated with emotion, memory, sensory processing, motor function, and cognitive control.

Purpose

To investigate the key nodes in obese females of reward-related regions and, based on key nodes, to evaluate the directionality of functional connectivity between key nodes and appetite-related regions.

Study Type

Prospective.

Population

Twenty-eight obese and 28 normal-weight female controls of similar age.

Field Strength/Sequence

3.0 T MRI and echo planar imaging (EPI) sequence, 3D BRAVO sequence.

Assessment

The fMRI data preprocessing was based on the Data Processing & Analysis of Brain Imaging and Statistical Parametric Mapping 12. Degree centrality calculation was based on the GRETNA toolkit and granger causality analysis were based on the DynamicBC toolbox.

Statistical Tests: Independent two-sample t-tests were used to assess the differences in demographic and clinical data between two groups. Two-sample t-tests were conducted to test the difference in degree centrality and effective connectivity of key nodes between two groups.

Results

Compared with normal-weight controls, obese females showed an increased degree centrality in the left ventral striatum/caudate (t = 2.96808, P < 0.05) and decreased degree centrality in right orbitofrontal cortex (OFC) (t = –3.3558, P < 0.05). The obese females showed directional effective connectivity between left ventral striatum/caudate and several regions (left inferior temporal gyrus, fusiform gyrus, postcentral gyrus, and right precentral gyrus) (P < 0.05). Directional effective connectivity was also observed between the right OFC and several regions (left middle temporal gyrus, cuneus, OFC, superior temporal gyrus, middle frontal gyrus, and right inferior parietal lobule) (P < 0.05).

Data Conclusion

The left ventral striatum/caudate and right OFC are key nodes in reward-related regions. The key nodes with reward processing mainly enhance visual processing of information and further participate in cognitive, attention, and sensorimotor processing.

Level of Evidence: 1.

Technical Efficacy: Stage 4.

J. Magn. Reson. Imaging 2019;50:541–551.

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