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Food Science and Human Wellness 2023, 12(2): 503-511 https://doi.org/10.1016/j.fshw.2022.07.052
Research Article | Open Access | Issue | Published: 07 September 2022

The structural characteristics of dietary fibers from Tremella fuciformis and their hypolipidemic effects in mice

Show Author's Information Shanshan Zhanga,b,  Xinle Xua,c,  Xu Caoa,d,  Tingting Liua,c( )
School of Food Science and Engineering, Jilin Agricultural University, Changchun 130118, China
Scientific Research Base of Edible Mushroom Processing Technology Integration, Ministry of Agriculture and Rural Affairs, Changchun 130118, China
Engineering Research Center of Grain Deep-processing and High-effeciency Utilization of Jilin Province, Changchun 130118, China
Key Laboratory of Technological Innovations for Grain Deep-processing and High-effeciency Utilization of By-products of Jilin Province, Changchun 130118, China

Peer review under responsibility of KeAi Communications Co., Ltd.

Keywords:
Structural Characterization, Dietary fiber, Hypolipidemic effects, Tremella fuciformis
Cite this article:
Zhang S, Xu X, Cao X, et al. The structural characteristics of dietary fibers from Tremella fuciformis and their hypolipidemic effects in mice. Food Science and Human Wellness, 2023, 12(2): 503-511. https://doi.org/10.1016/j.fshw.2022.07.052
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Abstract Full text About this article

In this study, Tremella fuciformis residues as raw material, dietary fibers from tremella were prepared by multiple enzymes. The structure of dietary fibers from tremella was studied by Fourier transform infrared (FTIR), X-ray diffraction analysis (XRD) and scanning electron microscopy (SEM). We analyzed their lipid-lowering properties in vitro (water holding, oil holding swelling cholesterol and sodium cholate binding capacitises) and the hypolipidemic effects in mice. The results showed that tremella dietary fibers presented the infrared absorption spectrum characteristics of polysaccharides and the characteristic diffraction peaks of cellulose type Ⅰ. SEM results indicated that the surface of insoluble dietary fiber (IDF) was porous, while the soluble dietary fiber (SDF) was relatively compact and spongy. IDF exhibited significantly higher water holding, oil holding, and swelling binding capacities than the corresponding SDF. However, SDF exhibited significantly higher viscosity than IDF. The results showed tremella dietary fibers were significant in swelling, water holding and oil holding, cholesterol and bile acids. In vivo experiment results in mice indicated that SDF has the best effect on hyperlipidemia mice than IDF and total dietary fiber (TDF). SDF showed that the total cholesterol (TC), triglyceride (TG) and low density lipoprotein cholesterol (LDL-C) contents dropped by 28.33%, 18.65%, and 48.97%, respectively, while high density lipoprotein cholesterol (HDL-C) content increased by 43.80%. Compared with the high-fat control (HCM) group, the arteriosclerosis index (AI) and liver index (LI) of the SDF group mice showed significant differences, indicating that SDF has a good auxiliary effect of lowering blood lipids. The administration of tremella fibers improved the lipid metabolism disorderly situation of hyperlipidemia mice. These results provide a reference for further research and rational development of T. fuciformis.


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About this article

The structural characteristics of dietary fibers from Tremella fuciformis and their hypolipidemic effects in mice

Show Author's information Shanshan Zhanga,b, Xinle Xua,c, Xu Caoa,d, Tingting Liua,c( )
School of Food Science and Engineering, Jilin Agricultural University, Changchun 130118, China
Scientific Research Base of Edible Mushroom Processing Technology Integration, Ministry of Agriculture and Rural Affairs, Changchun 130118, China
Engineering Research Center of Grain Deep-processing and High-effeciency Utilization of Jilin Province, Changchun 130118, China
Key Laboratory of Technological Innovations for Grain Deep-processing and High-effeciency Utilization of By-products of Jilin Province, Changchun 130118, China

Peer review under responsibility of KeAi Communications Co., Ltd.

Abstract

In this study, Tremella fuciformis residues as raw material, dietary fibers from tremella were prepared by multiple enzymes. The structure of dietary fibers from tremella was studied by Fourier transform infrared (FTIR), X-ray diffraction analysis (XRD) and scanning electron microscopy (SEM). We analyzed their lipid-lowering properties in vitro (water holding, oil holding swelling cholesterol and sodium cholate binding capacitises) and the hypolipidemic effects in mice. The results showed that tremella dietary fibers presented the infrared absorption spectrum characteristics of polysaccharides and the characteristic diffraction peaks of cellulose type Ⅰ. SEM results indicated that the surface of insoluble dietary fiber (IDF) was porous, while the soluble dietary fiber (SDF) was relatively compact and spongy. IDF exhibited significantly higher water holding, oil holding, and swelling binding capacities than the corresponding SDF. However, SDF exhibited significantly higher viscosity than IDF. The results showed tremella dietary fibers were significant in swelling, water holding and oil holding, cholesterol and bile acids. In vivo experiment results in mice indicated that SDF has the best effect on hyperlipidemia mice than IDF and total dietary fiber (TDF). SDF showed that the total cholesterol (TC), triglyceride (TG) and low density lipoprotein cholesterol (LDL-C) contents dropped by 28.33%, 18.65%, and 48.97%, respectively, while high density lipoprotein cholesterol (HDL-C) content increased by 43.80%. Compared with the high-fat control (HCM) group, the arteriosclerosis index (AI) and liver index (LI) of the SDF group mice showed significant differences, indicating that SDF has a good auxiliary effect of lowering blood lipids. The administration of tremella fibers improved the lipid metabolism disorderly situation of hyperlipidemia mice. These results provide a reference for further research and rational development of T. fuciformis.

Keywords: Structural Characterization, Dietary fiber, Hypolipidemic effects, Tremella fuciformis

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Publication history

Received: 02 October 2020
Revised: 27 October 2020
Accepted: 21 December 2020
Published: 07 September 2022
Issue date: March 2023

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© 2023 Beijing Academy of Food Sciences. Publishing services by Elsevier B.V. on behalf of KeAi Communications Co., Ltd.

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Acknowledgement

The study was financially supported by the Key Projects of the National Research and Development Program of China (2018YFD0400204).

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This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).

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