1
|
Yu X, Ren Z, Wang Y, Yuan G, Hu J, Song L, Pan C, Feng K, Liu Y, Shao L, Zhang L, Wang J, Zhao J, Bao N, Sun Z. Kaempferol attenuates particle-induced osteogenic impairment by regulating ER stress via the IRE1α-XBP1s pathway. J Biol Chem 2024; 300:107394. [PMID: 38768813 DOI: 10.1016/j.jbc.2024.107394] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2023] [Revised: 04/30/2024] [Accepted: 05/09/2024] [Indexed: 05/22/2024] Open
Abstract
Periprosthetic osteolysis and subsequent aseptic loosening are the primary causes of failure following total joint arthroplasty. Wear particle-induced osteogenic impairment is recognized as an important contributing factor in the development of osteolysis, with endoplasmic reticulum (ER) stress emerging as a pivotal underlying mechanism. Hence, searching for potential therapeutic targets and agents capable of modulating ER stress in osteoblasts is crucial for preventing aseptic loosening. Kaempferol (KAE), a natural flavonol compound, has shown promising osteoprotective effects and anti-ER stress properties in diverse diseases. However, the influence of KAE on ER stress-mediated osteogenic impairment induced by wear particles remains unclear. In this study, we observed that KAE effectively relieved TiAl6V4 particles-induced osteolysis by improving osteogenesis in a mouse calvarial model. Furthermore, we demonstrated that KAE could attenuate ER stress-mediated apoptosis in osteoblasts exposed to TiAl6V4 particles, both in vitro and in vivo. Mechanistically, our results revealed that KAE mitigated ER stress-mediated apoptosis by upregulating the IRE1α-XBP1s pathway while concurrently partially inhibiting the IRE1α-regulated RIDD and JNK activation. Collectively, our findings suggest that KAE is a prospective therapeutic agent for treating wear particle-induced osteolysis and highlight the IRE1α-XBP1s pathway as a potential therapeutic target for preventing aseptic loosening.
Collapse
Affiliation(s)
- Xin Yu
- Department of Orthopedics, Nanjing Jinling Hospital, Affiliated Hospital of Medical School, Nanjing University, Nanjing, China
| | - Zhengrong Ren
- State Key Laboratory of Pharmaceutical Biotechnology, School of Life Sciences, Nanjing University, Nanjing, China
| | - Yuxiang Wang
- Department of Orthopedics, Nanjing Jinling Hospital, Affiliated Hospital of Medical School, Nanjing University, Nanjing, China
| | - Guodong Yuan
- Department of Orthopedics, The Second Hospital of Nanjing, Nanjing University of Chinese Medicine, Nanjing, China
| | - Jianlun Hu
- State Key Laboratory of Pharmaceutical Biotechnology, Jiangsu Key Laboratory of Molecular Medicine, Medical School, Nanjing University, Nanjing, China
| | - Lin Song
- State Key Laboratory of Pharmaceutical Biotechnology, School of Life Sciences, Nanjing University, Nanjing, China
| | - Cheng Pan
- Department of Thoracic Surgery, The First Affiliated Hospital of Nanjing Medical University, Nanjing, China
| | - Kangkang Feng
- State Key Laboratory of Pharmaceutical Biotechnology, Jiangsu Key Laboratory of Molecular Medicine, Medical School, Nanjing University, Nanjing, China
| | - Yuqiao Liu
- Medical Information Data Bank, Nanjing Jinling Hospital, Affiliated Hospital of Medical School, Nanjing University, Nanjing, China
| | - Longgang Shao
- Department of Emergency Medicine, The Second Affiliated Hospital of Nanjing University of Chinese Medicine, Nanjing, China
| | - Li Zhang
- Department of Prosthodontics, Nanjing Stomatological Hospital, Affiliated Hospital of Medical School, Nanjing University, Nanjing, China
| | - Jinjuan Wang
- Department of Pharmacy, Nanjing First Hospital, Nanjing Medical University, Nanjing, China.
| | - Jianning Zhao
- Department of Orthopedics, Nanjing Jinling Hospital, Affiliated Hospital of Medical School, Nanjing University, Nanjing, China.
| | - Nirong Bao
- Department of Orthopedics, Nanjing Jinling Hospital, Affiliated Hospital of Medical School, Nanjing University, Nanjing, China.
| | - Zhongyang Sun
- Department of Orthopedics, Nanjing Jinling Hospital, Affiliated Hospital of Medical School, Nanjing University, Nanjing, China; Department of Orthopedics, Air Force Hospital of Eastern Theater, Anhui Medical University, Nanjing, China.
| |
Collapse
|
2
|
Zhao Y, Li B, Liu J, Chen L, Teng H. Galangin Prevents Against Ethanol-Induced Intestinal Barrier Dysfunction and NLRP3 Inflammasome Activation via NF-κB/MAPK Signaling Pathways in Mice and Caco-2 Cells. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2024. [PMID: 38602402 DOI: 10.1021/acs.jafc.4c00747] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2024]
Abstract
The potential of natural phytochemicals in addressing ethanol-related public safety concerns has been garnering attention. Galangin, a potent flavonoid renowned for its antioxidative and anti-inflammatory characteristics, is derived from the galanga plant, and propolis is derived from bees. Here, we documented the effects of galangin on ethanol-stimulated intestinal tight junction damage and investigated its potential protective mechanism in both in vivo and in vitro models, which has not been extensively investigated. Our results revealed that galangin efficaciously mitigated ethanol-induced intestine injury and dysfunction of the intestinal barrier. Concurrently, galangin significantly counteracted the ethanol-induced upregulation of NLRP3 inflammasome-associated proteins and activated the mitogen-activated protein kinase (MAPK) and nuclear factor kappa-B (NF-κB) signaling pathways in both the mouse colon and Caco-2 cells. Interestingly, similar to galangin, inhibitors of MAPKs and the NF-κB p65 reduced ethanol-induced NLRP3 inflammasome activation and intestinal tight junction damage. To sum up, our results showed that galangin blocks the ethanol-induced perturbation of the intestinal barrier and activation of the NLRP3 inflammasome via the NF-κB/MAPK signaling pathways.
Collapse
Affiliation(s)
- Yanan Zhao
- College of Food Science and Technology, Guangdong Ocean University, Zhanjiang 524000, People's Republic of China
- Guangdong Provincial Key Laboratory of Aquatic Product Processing and Safety, Zhanjiang, Guangdong 524000, People's Republic of China
- Guangdong Province Engineering Laboratory for Marine Biological Products, Zhanjiang, Guangdong 524000, People's Republic of China
- Guangdong Provincial Engineering Technology Research Center of Seafood, Zhanjiang, Guangdong 524000, People's Republic of China
- Key Laboratory of Advanced Processing of Aquatic Product of Guangdong Higher Education Institution, Zhanjiang, Guangdong 524000, People's Republic of China
| | - Bin Li
- College of Food Science and Technology, Guangdong Ocean University, Zhanjiang 524000, People's Republic of China
- Guangdong Provincial Key Laboratory of Aquatic Product Processing and Safety, Zhanjiang, Guangdong 524000, People's Republic of China
- Guangdong Province Engineering Laboratory for Marine Biological Products, Zhanjiang, Guangdong 524000, People's Republic of China
- Guangdong Provincial Engineering Technology Research Center of Seafood, Zhanjiang, Guangdong 524000, People's Republic of China
- Key Laboratory of Advanced Processing of Aquatic Product of Guangdong Higher Education Institution, Zhanjiang, Guangdong 524000, People's Republic of China
| | - Jiang Liu
- College of Food Science and Technology, Guangdong Ocean University, Zhanjiang 524000, People's Republic of China
- Guangdong Provincial Key Laboratory of Aquatic Product Processing and Safety, Zhanjiang, Guangdong 524000, People's Republic of China
- Guangdong Province Engineering Laboratory for Marine Biological Products, Zhanjiang, Guangdong 524000, People's Republic of China
- Guangdong Provincial Engineering Technology Research Center of Seafood, Zhanjiang, Guangdong 524000, People's Republic of China
- Key Laboratory of Advanced Processing of Aquatic Product of Guangdong Higher Education Institution, Zhanjiang, Guangdong 524000, People's Republic of China
| | - Lei Chen
- College of Food Science and Technology, Guangdong Ocean University, Zhanjiang 524000, People's Republic of China
- Guangdong Provincial Key Laboratory of Aquatic Product Processing and Safety, Zhanjiang, Guangdong 524000, People's Republic of China
- Guangdong Province Engineering Laboratory for Marine Biological Products, Zhanjiang, Guangdong 524000, People's Republic of China
- Guangdong Provincial Engineering Technology Research Center of Seafood, Zhanjiang, Guangdong 524000, People's Republic of China
- Key Laboratory of Advanced Processing of Aquatic Product of Guangdong Higher Education Institution, Zhanjiang, Guangdong 524000, People's Republic of China
| | - Hui Teng
- College of Food Science and Technology, Guangdong Ocean University, Zhanjiang 524000, People's Republic of China
- Guangdong Provincial Key Laboratory of Aquatic Product Processing and Safety, Zhanjiang, Guangdong 524000, People's Republic of China
- Guangdong Province Engineering Laboratory for Marine Biological Products, Zhanjiang, Guangdong 524000, People's Republic of China
- Guangdong Provincial Engineering Technology Research Center of Seafood, Zhanjiang, Guangdong 524000, People's Republic of China
- Key Laboratory of Advanced Processing of Aquatic Product of Guangdong Higher Education Institution, Zhanjiang, Guangdong 524000, People's Republic of China
| |
Collapse
|
3
|
Pisoschi AM, Iordache F, Stanca L, Cimpeanu C, Furnaris F, Geicu OI, Bilteanu L, Serban AI. Comprehensive and critical view on the anti-inflammatory and immunomodulatory role of natural phenolic antioxidants. Eur J Med Chem 2024; 265:116075. [PMID: 38150963 DOI: 10.1016/j.ejmech.2023.116075] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2023] [Revised: 12/17/2023] [Accepted: 12/18/2023] [Indexed: 12/29/2023]
Abstract
The immune response encompasses innate and adaptive immunity, each with distinct and specific activities. The innate immune system is constituted by phagocytic cells, macrophages, monocytes and neutrophils, the cascade system, and different classes of receptors such as toll-like receptors that are exploited by the innate immune cells. The adaptive immune system is antigen-specific, encompassing memory lymphocytes and the corresponding specific receptors. Inflammation is understood as an activation of different signaling pathways such as toll-like receptors or nuclear factor kappa-light-chain-enhancer of activated B cells, with an increase in nitric oxide, inflammatory cytokines and chemokines. Increased oxidative stress has been identified as main source of chronic inflammation. Phenolic antioxidants modulate the activities of lymphocytes and macrophages by impacting cytokines and nitric oxide release, exerting anti-inflammatory effect. The nuclear-factor kappa-light-chain-enhancer of activated B cells signaling pathway and the mitogen-activated protein kinase pathway are targeted, alongside an increase in nuclear factor erythroid 2-related factor mediated antioxidant response, triggering the activity of antioxidant enzymes. The inhibitive potential on phospholipase A2, cyclooxygenase and lipoxygenase in the arachidonic acid pathway, and the subsequent reduction in prostaglandin and leukotriene generation, reveals the potential of phenolics as inflammation antagonists. The immunomodulative potential encompasses the capacity to interfere with proinflammatory cytokine synthesis and with the expression of the corresponding genes. A diet rich in antioxidants can result in prevention of inflammation-related pathologies. More investigations are necessary to establish the role of these antioxidants in therapy. The appropriate delivery system and the prooxidant effects exhibited at large doses, or in the presence of heavy metal cations should be regarded.
Collapse
Affiliation(s)
- Aurelia Magdalena Pisoschi
- University of Agronomic Sciences and Veterinary Medicine of Bucharest, Faculty of Veterinary Medicine, Department Preclinical Sciences, 105 Splaiul Independentei, 050097, Bucharest, Romania.
| | - Florin Iordache
- University of Agronomic Sciences and Veterinary Medicine of Bucharest, Faculty of Veterinary Medicine, Department Preclinical Sciences, 105 Splaiul Independentei, 050097, Bucharest, Romania
| | - Loredana Stanca
- University of Agronomic Sciences and Veterinary Medicine of Bucharest, Faculty of Veterinary Medicine, Department Preclinical Sciences, 105 Splaiul Independentei, 050097, Bucharest, Romania
| | - Carmen Cimpeanu
- University of Agronomic Sciences and Veterinary Medicine of Bucharest, Faculty of Land Reclamation and Environmental Engineering, 59 Marasti Blvd, 011464, Bucharest, Romania
| | - Florin Furnaris
- University of Agronomic Sciences and Veterinary Medicine of Bucharest, Faculty of Veterinary Medicine, Department Preclinical Sciences, 105 Splaiul Independentei, 050097, Bucharest, Romania
| | - Ovidiu Ionut Geicu
- University of Agronomic Sciences and Veterinary Medicine of Bucharest, Faculty of Veterinary Medicine, Department Preclinical Sciences, 105 Splaiul Independentei, 050097, Bucharest, Romania; University of Bucharest, Faculty of Biology, Department Biochemistry and Molecular Biology, 91-95 Splaiul Independentei, 050095, Bucharest, Romania
| | - Liviu Bilteanu
- Molecular Nanotechnology Laboratory, National Institute for Research and Development in Microtechnologies, 126A, Erou Iancu Nicolae Street, 077190, Bucharest, Romania
| | - Andreea Iren Serban
- University of Agronomic Sciences and Veterinary Medicine of Bucharest, Faculty of Veterinary Medicine, Department Preclinical Sciences, 105 Splaiul Independentei, 050097, Bucharest, Romania; University of Bucharest, Faculty of Biology, Department Biochemistry and Molecular Biology, 91-95 Splaiul Independentei, 050095, Bucharest, Romania
| |
Collapse
|
4
|
Wang D, Chen J, Pu L, Yu L, Xiong F, Sun L, Yu Q, Cao X, Chen Y, Peng F, Peng C. Galangin: A food-derived flavonoid with therapeutic potential against a wide spectrum of diseases. Phytother Res 2023; 37:5700-5723. [PMID: 37748788 DOI: 10.1002/ptr.8013] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2023] [Revised: 08/08/2023] [Accepted: 08/30/2023] [Indexed: 09/27/2023]
Abstract
Galangin is an important flavonoid with natural activity, that is abundant in galangal and propolis. Currently, various biological activities of galangin have been disclosed, including anti-inflammation, antibacterial effect, anti-oxidative stress and aging, anti-fibrosis, and antihypertensive effect. Based on the above bioactivities, more and more attention has been paid to the role of galangin in neurodegenerative diseases, rheumatoid arthritis, osteoarthritis, osteoporosis, skin diseases, and cancer. In this paper, the natural sources, pharmacokinetics, bioactivities, and therapeutic potential of galangin against various diseases were systematically reviewed by collecting and summarizing relevant literature. In addition, the molecular mechanism and new preparation of galangin in the treatment of related diseases are also discussed, to broaden the application prospect and provide reference for its clinical application. Furthermore, it should be noted that current toxicity and clinical studies of galangin are insufficient, and more evidence is needed to support its possibility as a functional food.
Collapse
Affiliation(s)
- Daibo Wang
- Key Laboratory of Southwestern Chinese Medicine Resources, School of Pharmacy, Chengdu University of Traditional Chinese Medicine, Chengdu, China
| | - Junren Chen
- Key Laboratory of Southwestern Chinese Medicine Resources, School of Pharmacy, Chengdu University of Traditional Chinese Medicine, Chengdu, China
| | - Lin Pu
- Key Laboratory of Southwestern Chinese Medicine Resources, School of Pharmacy, Chengdu University of Traditional Chinese Medicine, Chengdu, China
| | - Lei Yu
- Key Laboratory of Southwestern Chinese Medicine Resources, School of Pharmacy, Chengdu University of Traditional Chinese Medicine, Chengdu, China
| | - Fang Xiong
- Key Laboratory of Southwestern Chinese Medicine Resources, School of Pharmacy, Chengdu University of Traditional Chinese Medicine, Chengdu, China
| | - Luyao Sun
- Key Laboratory of Southwestern Chinese Medicine Resources, School of Pharmacy, Chengdu University of Traditional Chinese Medicine, Chengdu, China
| | - Qian Yu
- Key Laboratory of Southwestern Chinese Medicine Resources, School of Pharmacy, Chengdu University of Traditional Chinese Medicine, Chengdu, China
| | - Xiaoyu Cao
- Key Laboratory of Southwestern Chinese Medicine Resources, School of Pharmacy, Chengdu University of Traditional Chinese Medicine, Chengdu, China
| | - Yan Chen
- Key Laboratory of Southwestern Chinese Medicine Resources, School of Pharmacy, Chengdu University of Traditional Chinese Medicine, Chengdu, China
| | - Fu Peng
- Department of Pharmacology, Key Laboratory of Drug-Targeting and Drug Delivery System of the Education Ministry, Sichuan Engineering Laboratory for Plant-Sourced Drug and Sichuan Research Center for Drug Precision Industrial Technology, West China School of Pharmacy, Sichuan University, Chengdu, China
| | - Cheng Peng
- Key Laboratory of Southwestern Chinese Medicine Resources, School of Pharmacy, Chengdu University of Traditional Chinese Medicine, Chengdu, China
| |
Collapse
|
5
|
Chen J, Zhong H, Huang Z, Chen X, You J, Zou T. A Critical Review of Kaempferol in Intestinal Health and Diseases. Antioxidants (Basel) 2023; 12:1642. [PMID: 37627637 PMCID: PMC10451660 DOI: 10.3390/antiox12081642] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2023] [Revised: 08/14/2023] [Accepted: 08/17/2023] [Indexed: 08/27/2023] Open
Abstract
Kaempferol, a secondary metabolite found in plants, is a naturally occurring flavonoid displaying significant potential in various biological activities. The chemical structure of kaempferol is distinguished by the presence of phenyl rings and four hydroxyl substituents, which make it an exceptional radical scavenger. Most recently, an increasing number of studies have demonstrated the significance of kaempferol in the regulation of intestinal function and the mitigation of intestinal inflammation. The focus of the review will primarily be on its impact in terms of antioxidant properties, inflammation, maintenance of intestinal barrier function, and its potential in the treatment of colorectal cancer and obesity. Future research endeavors should additionally give priority to investigating the specific dosage and duration of kaempferol administration for different pathological conditions, while simultaneously conducting deeper investigations into the comprehensible mechanisms of action related to the regulation of aryl hydrocarbon receptor (AhR). This review intends to present novel evidence supporting the utilization of kaempferol in the regulation of gut health and the management of associated diseases.
Collapse
Affiliation(s)
| | | | | | | | | | - Tiande Zou
- Jiangxi Province Key Laboratory of Animal Nutrition, College of Animal Science and Technology, Jiangxi Agricultural University, Nanchang 330045, China; (J.C.); (H.Z.); (Z.H.); (X.C.); (J.Y.)
| |
Collapse
|
6
|
Wang W, Shang H, Li J, Ma Y, Xu C, Ma J, Hou J, Jiang Z. Four Different Structural Dietary Polyphenols, Especially Dihydromyricetin, Possess Superior Protective Effect on Ethanol-Induced ICE-6 and AML-12 Cytotoxicity: The Role of CYP2E1 and Keap1-Nrf2 Pathways. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2023; 71:1518-1530. [PMID: 36637065 DOI: 10.1021/acs.jafc.2c06478] [Citation(s) in RCA: 10] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/17/2023]
Abstract
Polyphenols have received attention as dietary supplements for the relief of alcoholic liver disease (ALD) due to various bioactivities. Ethanol-induced rat small intestinal epithelial cell 6 (IEC-6) and alpha mouse liver 12 (AML-12) cell models were pretreated with four dietary polyphenols with different structures to explore their effects on cytotoxicity and potential protective mechanisms. The results showed that polyphenols had potential functions to inhibit ethanol-induced AML-12 and IEC-6 cell damage and oxidative stress, and restore ethanol-induced IEC-6 permeability and tight junction gene expression. Especially, dihydromyricetin (DMY) had the best protective effect on ethanol-induced cytotoxicity, followed by apigenin (API). Western blot results showed that DMY and API had the best ability to inhibit CYP2E1 and Keap1, and promote nuclear translocation of Nrf2, which might be the potential mechanism by which DMY and API attenuate ethanol-induced cytotoxicity. Moreover, the molecular docking results predicted that DMY and API could bind more tightly to the amino acid residues of CYP2E1 and Keap1, which might be one of the inhibitory modes of dietary polyphenols on CYP2E1 and Keap1. This study provided a rationale for the subsequent protective effect of dietary polyphenols on alcohol-induced liver injury in animal models and provided new clues on bioactive components for ALD-protection based on the gut-liver axis.
Collapse
Affiliation(s)
- Wan Wang
- Key Laboratory of Dairy Science, Northeast Agricultural University, College of Food Science, Harbin 150030, China
| | - Hang Shang
- Key Laboratory of Dairy Science, Northeast Agricultural University, College of Food Science, Harbin 150030, China
| | - Jinzhe Li
- Key Laboratory of Dairy Science, Northeast Agricultural University, College of Food Science, Harbin 150030, China
| | - Yue Ma
- Key Laboratory of Dairy Science, Northeast Agricultural University, College of Food Science, Harbin 150030, China
| | - Cong Xu
- Key Laboratory of Dairy Science, Northeast Agricultural University, College of Food Science, Harbin 150030, China
| | - Jiage Ma
- Key Laboratory of Dairy Science, Northeast Agricultural University, College of Food Science, Harbin 150030, China
| | - Juncai Hou
- Key Laboratory of Dairy Science, Northeast Agricultural University, College of Food Science, Harbin 150030, China
| | - Zhanmei Jiang
- Key Laboratory of Dairy Science, Northeast Agricultural University, College of Food Science, Harbin 150030, China
| |
Collapse
|
7
|
The Barrier-Enhancing Function of Soluble Yam (Dioscorea opposita Thunb.) Polysaccharides in Rat Intestinal Epithelial Cells, as Affected by the Covalent Se Conjugation. Nutrients 2022; 14:nu14193950. [PMID: 36235602 PMCID: PMC9571917 DOI: 10.3390/nu14193950] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2022] [Revised: 09/18/2022] [Accepted: 09/21/2022] [Indexed: 11/16/2022] Open
Abstract
The non-starch yam polysaccharides (YP) are the bioactive substances of edible yam, while Se is an essential nutrient for the human body. Whether a covalent conjugation of Se to YP might cause bioactivity change for the resultant selenylated YP in the intestine is still insufficiently studied, including the critical intestinal barrier function. In this study, two selenylated YP products, namely, YPSe-I and YPSe-II, with corresponding Se contents of 795 and 1480 mg/kg, were obtained by the reaction of YP and Na2SeO3 in the presence of HNO3 and then assessed for their bioactivities to a cell model (i.e., rat intestinal epithelial IEC-6 cells). The results showed that YP, YPSe-I, and YPSe-II at 5–80 μg/mL dosages could promote cell growth with treatment times of 12–24 h. The three samples also could improve barrier integrity via increasing cell monolayer resistance and anti-bacterial activity against E. coli or by reducing paracellular permeability and bacterial translocation. Additionally, the three samples enhanced F-actin distribution and promoted the expression of the three tight junction proteins, namely, zonula occluden-1, occludin, and claudin-1. Meanwhile, the expression levels of ROCK and RhoA, two critical proteins in the ROCK/RhoA singling pathway, were down-regulated by these samples. Collectively, YPSe-I and, especially, YPSe-II were more potent than YP in enhancing the assessed bioactivities. It is thus concluded that this chemical selenylation of YP brought about enhanced activity in the cells to promote barrier integrity, while a higher selenylation extent of the selenylated YP induced much activity enhancement. Collectively, the results highlighted the important role of the non-metal nutrient Se in the modified polysaccharides.
Collapse
|