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Tan SSY, Shanmugham M, Chin YL, An J, Chua CK, Ong ES, Leo CH. Pressurized Hot Water Extraction of Mangosteen Pericarp and Its Associated Molecular Signatures in Endothelial Cells. Antioxidants (Basel) 2023; 12:1932. [PMID: 38001785 PMCID: PMC10669822 DOI: 10.3390/antiox12111932] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2023] [Revised: 10/17/2023] [Accepted: 10/27/2023] [Indexed: 11/26/2023] Open
Abstract
The mangosteen (Garcinia mangostana L.) pericarp is known to be rich in potent bioactive phytochemical compounds such as xanthones, which possess pharmacologically important antioxidant activity and beneficial cardiometabolic properties. Mangosteen pericarp is typically classified as unavoidable food waste and discarded, despite being rich in bioactive phytochemical compounds that therefore present an exciting opportunity for valorization. Thus, this study aims to extract phytochemical compounds from mangosteen pericarp using pressurized hot water extraction (PHWE) and determine its biological effects in endothelial cells using RNA sequencing. Liquid chromatography with MS/MS (LC/MSMS) and UV detection (LC/UV) was subsequently used to identify three key phytochemical compounds extracted from the mangosteen pericarp: α-Mangostin, γ-Mangostin, and Gartanin. Within the tested range of extraction temperatures by PHWE, our results demonstrated that an extraction temperature of 120 °C yielded the highest concentrations of α-Mangostin, γ-Mangostin, and Gartanin with a concomitant improvement in antioxidant capacity compared to other extraction temperatures. Using global transcriptomic profiling and bioinformatic analysis, the treatment of endothelial cells with mangosteen pericarp extracts (120 °C PHWE) for 48 h caused 408 genes to be differentially expressed. Furthermore, our results demonstrated that key biological processes related to "steroid biosynthesis and metabolism", likely involving the activation of the AMPK signaling pathway, were upregulated by mangosteen pericarp extract treatment. In conclusion, our study suggests a green extraction method to valorize phytochemical compounds from mangosteen pericarp as a natural product with potential beneficial effects on cardiometabolic health.
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Affiliation(s)
- Sakeena Si Yu Tan
- Pillar of Engineering Product Development, Singapore University of Technology & Design, Singapore 487372, Singapore; (S.S.Y.T.); (C.K.C.)
- Center for Healthcare Education, Entrepreneurship and Research (CHEERS), Singapore University of Technology & Design, Singapore 487372, Singapore; (J.A.); (E.S.O.)
| | - Meyammai Shanmugham
- Science, Math & Technology, Singapore University of Technology & Design, Singapore 487372, Singapore; (M.S.); (Y.L.C.)
| | - Yu Ling Chin
- Science, Math & Technology, Singapore University of Technology & Design, Singapore 487372, Singapore; (M.S.); (Y.L.C.)
| | - Jia An
- Center for Healthcare Education, Entrepreneurship and Research (CHEERS), Singapore University of Technology & Design, Singapore 487372, Singapore; (J.A.); (E.S.O.)
| | - Chee Kai Chua
- Pillar of Engineering Product Development, Singapore University of Technology & Design, Singapore 487372, Singapore; (S.S.Y.T.); (C.K.C.)
- Center for Healthcare Education, Entrepreneurship and Research (CHEERS), Singapore University of Technology & Design, Singapore 487372, Singapore; (J.A.); (E.S.O.)
| | - Eng Shi Ong
- Center for Healthcare Education, Entrepreneurship and Research (CHEERS), Singapore University of Technology & Design, Singapore 487372, Singapore; (J.A.); (E.S.O.)
- Science, Math & Technology, Singapore University of Technology & Design, Singapore 487372, Singapore; (M.S.); (Y.L.C.)
| | - Chen Huei Leo
- Center for Healthcare Education, Entrepreneurship and Research (CHEERS), Singapore University of Technology & Design, Singapore 487372, Singapore; (J.A.); (E.S.O.)
- Science, Math & Technology, Singapore University of Technology & Design, Singapore 487372, Singapore; (M.S.); (Y.L.C.)
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Kitikiew S, Chieng ZX, Li CY, Kuo HW, Cheng W. Injection administration of mangosteen, Garcinia mangostana, husk extract enhances physiological and immune-neuroendocrinological regulation of Macrobrachiumrosenbergii. FISH & SHELLFISH IMMUNOLOGY 2023; 141:109019. [PMID: 37634755 DOI: 10.1016/j.fsi.2023.109019] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/17/2023] [Revised: 08/18/2023] [Accepted: 08/18/2023] [Indexed: 08/29/2023]
Abstract
The study aimed to investigate the effects of injecting mangosteen husk hot-water extracts (MHE) on immune and physiological factors in Macrobrachium rosenbergii. Different doses of MHE (10, 20, and 40 μg prawn-1) were injected into the prawns, and various immune and physiological parameters were evaluated. The results revealed that higher doses of MHE (20 and 40 μg prawn-1) led to significant increases in immune parameters, improved phagocytic activity, and clearance efficiency. However, certain parameters, such as phenoloxidase activity per granulocyte, plasma glucose, and lactate levels were decreased after injection. Moreover, prawns injected with MHE and subjected to hypothermal stress exhibited changes in haemolymph dopamine and norepinephrine. Prawns injected with MHE for 7 days showed increased survival rates when challenged with Lactococcus garvieae. The relative survival percentages were 11.8%, 46.6%, and 47.1% for MHE doses of 10, 20, and 40 μg prawn-1 injection, respectively, indicating enhanced resistance to the pathogen. In conclusion, injecting MHE can act as an immunostimulant and physiological and neuroendocrine regulator for prawns, enhancing their resistance to L. garvieae.
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Affiliation(s)
- Suwaree Kitikiew
- Department of Animal Production Technology and Fisheries, Faculty of Agricultural Technology, King Mongkut's Institute of Technology Ladkrabang, Bangkok, 10520, Thailand
| | - Zheng-Xiang Chieng
- Department of Aquaculture, National Pingtung University of Science and Technology, Pingtung, 91201, Taiwan, ROC
| | - Cheng-Ying Li
- Department of Aquaculture, National Pingtung University of Science and Technology, Pingtung, 91201, Taiwan, ROC
| | - Hsin-Wei Kuo
- Department of Aquaculture, National Pingtung University of Science and Technology, Pingtung, 91201, Taiwan, ROC; General Research Service Center, National Pingtung University of Science and Technology, Pingtung, 91201, Taiwan, ROC
| | - Winton Cheng
- Department of Aquaculture, National Pingtung University of Science and Technology, Pingtung, 91201, Taiwan, ROC.
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Kuo HW, Li CY, Chieng ZX, Cheng W. Dietary administration of mangosteen, Garcinia mangostana, peel extract enhances the growth, and physiological and immunoendocrinological regulation of prawn, Macrobrachiumrosenbergii. FISH & SHELLFISH IMMUNOLOGY 2023; 140:108982. [PMID: 37536467 DOI: 10.1016/j.fsi.2023.108982] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/13/2023] [Revised: 07/23/2023] [Accepted: 07/31/2023] [Indexed: 08/05/2023]
Abstract
In this study, we investigated the potential immunostimulatory effects of mangosteen (Garcinia mangostana) peel extract on Macrobrachium rosenbergii, specifically in enhancing immunity and resistance against Lactococcus garvieae. We employed a dietary administration approach to assess the impact of different extract preparations from mangosteen peel, namely mangosteen peel powder (MPP), boiled mangosteen peel powder (MPB), and mangosteen peel extract (MPE). Following the administration of mangosteen peel extract, we evaluated growth performance, innate immune parameters, and disease resistance in the prawns. The results revealed a significant increase in total haemocyte count (THC), differential haemocyte count (DHC), phenoloxidase (PO) activity, respiratory bursts (RBs), as well as phagocytic activity and clearance efficiency against L. garvieae. Based on these findings, we suggest that mangosteen peel extract can be utilized as an immunostimulant for prawns through dietary administration, regulating immune responses and enhancing resistance against pathogens by modulating carbohydrate metabolism.
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Affiliation(s)
- Hsin-Wei Kuo
- General Research Service Center, National Pingtung University of Science and Technology, Pingtung, 91201, Taiwan, ROC; Department of Aquaculture, National Pingtung University of Science and Technology, Pingtung, 91201, Taiwan, ROC
| | - Cheng-Ying Li
- Department of Aquaculture, National Pingtung University of Science and Technology, Pingtung, 91201, Taiwan, ROC
| | - Zheng-Xiang Chieng
- Department of Aquaculture, National Pingtung University of Science and Technology, Pingtung, 91201, Taiwan, ROC
| | - Winton Cheng
- Department of Aquaculture, National Pingtung University of Science and Technology, Pingtung, 91201, Taiwan, ROC.
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The Role of By-Products of Fruit and Vegetable Processing for the Dietary Treatment of Cardiovascular Risk Factors: A Narrative Review. Antioxidants (Basel) 2022; 11:antiox11112170. [DOI: 10.3390/antiox11112170] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2022] [Revised: 10/21/2022] [Accepted: 10/27/2022] [Indexed: 11/06/2022] Open
Abstract
Polyphenols-rich food has been utilized to induce a positive effect on human health. Considering that fruit and vegetable by-products (seeds, pomace, and peels) are sources of polyphenols, previous studies have investigated the effect of dietary supplementation with food by-products on cardiometabolic disorders, such as high fasting blood glucose, dyslipidemia, and obesity. Endothelial dysfunction has also been considered a cardiometabolic parameter, given that it precedes cardiovascular disease. However, there is a scarcity of narrative reviews reporting the effect of food by-product supplementation on cardiometabolic disorders in animal and human clinical trials. In this sense, the present narrative review aims to investigate the impact of fruit and vegetable by-product supplementation on cardiometabolic disorders in humans and animals, exploring the possible mechanisms whenever possible. Research articles were retrieved based on a search of the following databases: PubMed, ScienceDirect, and Google Scholar using the following keywords and synonyms combined: (“fruit by-products” or “food waste” or “pomace” or “bagasse” or “seeds” or “waste products”) AND (“heart disease risk factors” or “endothelial dysfunction” or “atherosclerosis”). It was shown that fruit and vegetable by-products could efficiently improve cardiometabolic disorders in patients with chronic diseases, including hypertension, type II diabetes mellitus, and dyslipidemia. Such effects can be induced by the polyphenols present in food by-products. In conclusion, food by-product supplementation has a positive effect on cardiometabolic disorders. However, further studies investigating the effect of food by-products on cardiometabolic disorders in humans are still necessary so that solid conclusions can be drawn.
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John OD, Mushunje AT, Surugau N, Guad RM. The metabolic and molecular mechanisms of α‑mangostin in cardiometabolic disorders (Review). Int J Mol Med 2022; 50:120. [PMID: 35904170 PMCID: PMC9354700 DOI: 10.3892/ijmm.2022.5176] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2022] [Accepted: 07/08/2022] [Indexed: 12/03/2022] Open
Abstract
α-mangostin is a xanthone predominantly encountered in Garcinia mangostana. Extensive research has been carried out concerning the effects of this compound on various diseases, including obesity, cancer and metabolic disorders. The present review suggests that α-mangostin exerts promising anti-obesity, hepatoprotective, antidiabetic, cardioprotective, antioxidant and anti-inflammatory effects on various pathways in cardiometabolic diseases. The anti-obesity effects of α-mangostin include the reduction of body weight and adipose tissue size, the increase in fatty acid oxidation, the activation of hepatic AMP-activated protein kinase and Sirtuin-1, and the reduction of peroxisome proliferator-activated receptor γ expression. Hepatoprotective effects have been revealed, due to reduced fibrosis through transforming growth factor-β 1 pathways, reduced apoptosis and steatosis through reduced sterol regulatory-element binding proteins expression. The antidiabetic effects include decreased fasting blood glucose levels, improved insulin sensitivity and the increased expression of GLUT transporters in various tissues. Cardioprotection is exhibited through the restoration of cardiac functions and structure, improved mitochondrial functions, the promotion of M2 macrophage populations, reduced endothelial and cardiomyocyte apoptosis and fibrosis, and reduced acid sphingomyelinase activity and ceramide depositions. The antioxidant effects of α-mangostin are mainly related to the modulation of antioxidant enzymes, the reduction of oxidative stress markers, the reduction of oxidative damage through a reduction in Sirtuin 3 expression mediated by phosphoinositide 3-kinase/protein kinase B/peroxisome proliferator-activated receptor-γ coactivator-1α signaling pathways, and to the increase in Nuclear factor-erythroid factor 2-related factor 2 and heme oxygenase-1 expression levels. The anti-inflammatory effects of α-mangostin include its modulation of nuclear factor-κB related pathways, the suppression of mitogen-activated protein kinase activation, increased macrophage polarization to M2, reduced inflammasome occurrence, increased Sirtuin 1 and 3 expression, the reduced expression of inducible nitric oxide synthase, the production of nitric oxide and prostaglandin E2, the reduced expression of Toll-like receptors and reduced proinflammatory cytokine levels. These effects demonstrate that α-mangostin may possess the properties required for a suitable candidate compound for the management of cardiometabolic diseases.
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Affiliation(s)
- Oliver Dean John
- Faculty of Science and Natural Resources, Universiti Malaysia Sabah, 88400 Kota Kinabalu, Sabah, Malaysia
| | - Annals Tatenda Mushunje
- Faculty of Science, Asia‑Pacific International University, Muak Lek, Saraburi 18180, Thailand
| | - Noumie Surugau
- Faculty of Science and Natural Resources, Universiti Malaysia Sabah, 88400 Kota Kinabalu, Sabah, Malaysia
| | - Rhanye Mac Guad
- Faculty of Medicine and Health Sciences, Universiti Malaysia Sabah, 88400 Kota Kinabalu, Sabah, Malaysia
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Panchal SK, John OD, Mathai ML, Brown L. Anthocyanins in Chronic Diseases: The Power of Purple. Nutrients 2022; 14:2161. [PMID: 35631301 PMCID: PMC9142943 DOI: 10.3390/nu14102161] [Citation(s) in RCA: 14] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2022] [Revised: 05/16/2022] [Accepted: 05/20/2022] [Indexed: 02/06/2023] Open
Abstract
Anthocyanins are mainly purple-coloured phenolic compounds of plant origin that as secondary metabolites are important in plant survival. Understanding their health benefits in humans requires sourcing these unstable compounds in sufficient quantities at a reasonable cost, which has led to improved methods of extraction. Dark-coloured fruits, cereals and vegetables are current sources of these compounds. The range of potential sustainable sources is much larger and includes non-commercialised native plants from around the world and agri-waste containing anthocyanins. In the last 5 years, there have been significant advances in developing the therapeutic potential of anthocyanins in chronic human diseases. Anthocyanins exert their beneficial effects through improvements in gut microbiota, oxidative stress and inflammation, and modulation of neuropeptides such as insulin-like growth factor-1. Their health benefits in humans include reduced cognitive decline; protection of organs such as the liver, as well as the cardiovascular system, gastrointestinal tract and kidneys; improvements in bone health and obesity; and regulation of glucose and lipid metabolism. This review summarises some of the sources of anthocyanins and their mechanisms and benefits in the treatment of chronic human diseases.
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Affiliation(s)
- Sunil K. Panchal
- School of Science, Western Sydney University, Penrith, NSW 2753, Australia;
- Global Centre for Land-Based Innovation, Western Sydney University, Penrith, NSW 2753, Australia
| | - Oliver D. John
- Faculty of Science and Natural Resources, Universiti Malaysia Sabah, Kota Kinabalu 88400, Sabah, Malaysia; or
| | - Michael L. Mathai
- Institute of Health and Sport, College of Health and Biomedicine, Victoria University, Melbourne, VIC 3021, Australia;
- Florey Institute of Neuroscience and Mental Health, Melbourne, VIC 3052, Australia
| | - Lindsay Brown
- School of Pharmacy and Medical Science, Griffith University, Gold Coast, QLD 4222, Australia
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Dissanayake IH, Zak V, Kaur K, Jaye K, Ayati Z, Chang D, Li CG, Bhuyan DJ. Australian native fruits and vegetables: Chemical composition, nutritional profile, bioactivity and potential valorization by industries. Crit Rev Food Sci Nutr 2022; 63:8511-8544. [PMID: 35491610 DOI: 10.1080/10408398.2022.2057913] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
Australian native plants have adapted themselves to harsh climatic conditions enabling them to produce unique and high levels of secondary metabolites. Native fruits and vegetables have been an integral part of the Indigenous Australian diet and Bush medicine for centuries. They have recently gained popularity owing to their rich dietary fiber, minerals, polyphenolic and antioxidant contents. This review presents a comprehensive summary and critical assessment of the studies performed in the last few decades to understand the phytochemical and nutritional profiles and therapeutic properties of Australian native fruits and vegetables. Furthermore, the potential of these fruits and vegetables as functional food ingredients and in the prevention and treatment of different diseases is discussed. Research on the nutritional and phytochemical profiles and therapeutic activity of Australian vegetables is limited with most studies focused on native fruits. These fruits have demonstrated promising antioxidant, anticancer, anti-inflammatory and antimicrobial activities mostly in in vitro models. More research to a) identify novel bioactive compounds, b) define optimal post-harvest and extraction methods, and c) understand molecular mechanisms of pharmacological activity through preclinical and clinical studies is prudent for the prospective and wider use of Australian native fruits and vegetables by the food, pharmaceutical, and nutraceutical industries.
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Affiliation(s)
| | - Valeria Zak
- School of Science, Western Sydney University, Campbelltown, NSW, Australia
| | - Kirandeep Kaur
- NICM Health Research Institute, Western Sydney University, Penrith, NSW, Australia
| | - Kayla Jaye
- NICM Health Research Institute, Western Sydney University, Penrith, NSW, Australia
| | - Zahra Ayati
- NICM Health Research Institute, Western Sydney University, Penrith, NSW, Australia
| | - Dennis Chang
- NICM Health Research Institute, Western Sydney University, Penrith, NSW, Australia
| | - Chun Guang Li
- NICM Health Research Institute, Western Sydney University, Penrith, NSW, Australia
| | - Deep Jyoti Bhuyan
- NICM Health Research Institute, Western Sydney University, Penrith, NSW, Australia
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Li X, Chen H, Jia Y, Peng J, Li C. Inhibitory Effects against Alpha-Amylase of an Enriched Polyphenol Extract from Pericarp of Mangosteen (Garcinia mangostana). Foods 2022; 11:foods11071001. [PMID: 35407086 PMCID: PMC8997748 DOI: 10.3390/foods11071001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2022] [Revised: 03/25/2022] [Accepted: 03/27/2022] [Indexed: 11/16/2022] Open
Abstract
The pericarp of mangosteen, a by-product of the mangosteen, is rich in polyphenols. In this study, an efficient and environmentally friendly method for preparative enrichment of polyphenols from mangosteen pericarp (MPPs) was developed, and the inhibitory effects on starch digestion were also evaluated. It was found that the optimal extract method of MPPs was at a solid to solvent ratio of 1:50 g/mL, pH of 2, and at 80 °C for 2 h. The IC50 of MPPs for α-amylase was 0.28 mg/mL. Based on the fluorescence quenching results, we presumed that MPPs could alter the natural structure of α-amylase, resulting in inhibitory activity on α-amylase. In addition, MPPs significantly reduced the blood glucose peak and AUC of glucose responses in rats after ingestion of the starch solution. Taken together, MPPs may have the potential as a functional supplement for blood glucose control and diabetes prevention.
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Affiliation(s)
- Xiaofang Li
- College of Food Science and Technology, Huazhong Agricultural University, Wuhan 430070, China; (X.L.); (H.C.)
| | - Haoze Chen
- College of Food Science and Technology, Huazhong Agricultural University, Wuhan 430070, China; (X.L.); (H.C.)
| | - Yan Jia
- Beijing Key Lab of Plant Resource Research and Development, School of Science, Beijing Technology and Business University, Beijing 100048, China
- Correspondence: (Y.J.); (C.L.)
| | - Jinming Peng
- College of Food Science and Technology, Zhongkai University of Agriculture and Engineering, Guangzhou 510225, China;
| | - Chunmei Li
- College of Food Science and Technology, Huazhong Agricultural University, Wuhan 430070, China; (X.L.); (H.C.)
- Key Laboratory of Environment Correlative Food Science, Ministry of Education, Huazhong Agricultural University, Wuhan 430070, China
- Correspondence: (Y.J.); (C.L.)
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Tropical fruits from Australia as potential treatments for metabolic syndrome. Curr Opin Pharmacol 2022; 63:102182. [PMID: 35149297 DOI: 10.1016/j.coph.2022.102182] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2021] [Revised: 01/03/2022] [Accepted: 01/04/2022] [Indexed: 12/16/2022]
Abstract
Australia has a unique and diverse flora, including indigenous fruits, used by Australian Aboriginals for food and medicines for up to 45,000 years as well as recently introduced fruits for commercial production. However, this range of fruits has not led to the development of functional foods, for example for chronic inflammatory diseases such as metabolic syndrome including obesity, hypertension, fatty liver and diabetes. This review examines the potential of tropical and subtropical fruits from Australia to be used as functional foods for metabolic syndrome, including Davidson's plum, Queen Garnet plum, durian, litchi, breadfruit, jackfruit, mangosteen, papaya, jabuticaba, coffee and seaweed. Preclinical studies have defined potential responses of these functional foods in metabolic syndrome but the usefulness in humans with metabolic syndrome requires clinical studies which are scarce in the relevant literature. Overall, these Australian examples show that tropical fruits can provide functional foods to decrease chronic inflammatory diseases.
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Anti-Obesity Effects of Matoa ( Pometia pinnata) Fruit Peel Powder in High-Fat Diet-Fed Rats. Molecules 2021; 26:molecules26216733. [PMID: 34771142 PMCID: PMC8588254 DOI: 10.3390/molecules26216733] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2021] [Revised: 11/03/2021] [Accepted: 11/03/2021] [Indexed: 12/21/2022] Open
Abstract
Fruit peels, pericarps, or rinds are rich in phenolic/polyphenolic compounds with antioxidant properties and potentially beneficial effects against obesity and obesity-related non-communicable diseases. This study investigated the anti-obesity effects of matoa (Pometia pinnata) and salak (Salacca zalacca) fruit peel. Neither matoa peel powder (MPP) nor salak peel powder (SPP) affected the body weight, visceral fat weight, or serum glucose or lipid levels of Sprague-Dawley rats when included as 1% (w/w) of a high-fat diet (HFD). However, MPP significantly decreased the hepatic lipid level. MPP at a dose of 3% (w/w) of the HFD decreased body weight, visceral fat, and serum triglyceride levels as well as the hepatic lipid content. The inhibitory effect of MPP on hepatic lipid accumulation was not enhanced when its concentration was increased from 1% to 3% of the HFD. The anti-obesity effect of matoa was partly explained by the inhibitory effect of the matoa peel extract on fatty acid-induced secretion of ApoB-48 protein, a marker of intestinal chylomicrons, in differentiated Caco-2 cell monolayers. We identified hederagenin saponins that are abundant in MPP as potential anti-obesity substances. These results will contribute towards the development of functional foods with anti-obesity effects using the matoa fruit peel.
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