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Azimi-Bahnamiri F, Mokhtari H, Khalilollah S, Soltanahmadi SV, Omraninava M, Disfani RA, Mirzaie MS, Ranjbaran H, Javan R, Shooraj M, Akhavan-Sigari R. Decellularized human amniotic membrane loaded with epigallocatechin-3-gallate accelerated diabetic wound healing. J Tissue Viability 2024; 33:18-26. [PMID: 38042701 DOI: 10.1016/j.jtv.2023.11.008] [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: 09/24/2023] [Revised: 11/10/2023] [Accepted: 11/24/2023] [Indexed: 12/04/2023]
Abstract
Diabetic wounds, as one of the most important complications of diabetes, face many challenges in treatment. Herein we investigated whether decellularized human amniotic membrane (dAM) loaded with epigallocatechin-3-gallate (EGCG) could promote healing in diabetic rats. Sixty diabetic rats were randomly planned into the untreated group, dAM group, EGCG group, and dAM + EGCG group. On days 7, 14, and 21, five rats from each group were sampled for stereological, molecular, and tensiometrical assessments. Our finding revealed that the wound closure rate, the total volumes of new epidermis and dermis, the numerical densities of fibroblasts, blood vessels, collagen density as well as tensiometrical parameters of the healed wounds were considerably increased in the treated groups than in the untreated group, and these changes were more obvious in the dAM + EGCG ones. Furthermore, the expression of TGF-β, bFGF, and VEGF genes were significantly upregulated in all treated groups compared to the untreated group and were greater in the dAM + EGCG group. This is while expression of TNF-α and IL-1β, as well as cell numerical densities of neutrophils and macrophages decreased more considerably in the dAM + EGCG group in comparison to the other groups. In conclusion, it was found that using both dAM transplantation and EGCG has more effect on diabetic wound healing.
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Affiliation(s)
| | - Hossein Mokhtari
- Amol School of Paramedical Sciences, Mazandaran University of Medical Sciences, Sari, Iran
| | - Shayan Khalilollah
- School of Medicine, Tehran Medical Sciences, Islamic Azad University, Tehran, Iran
| | | | - Melody Omraninava
- Health Reproductive Research Center, Islamic Azad University, Sari, Iran
| | | | | | - Hossein Ranjbaran
- Immunogenetics Research Center, School of Medicine, Mazandaran University of Medical Sciences, Sari, Iran.
| | - Roghayeh Javan
- Non-Comunicable Disease Risearch Center, Sabzevar University of Medical Sciences, Sabzevar, Iran.
| | - Mahdi Shooraj
- Student Research Committee, Mazandaran University of Medical Sciences, Sari, Iran
| | - Reza Akhavan-Sigari
- University Medical Center, Tuebingen, Germany; Department of Health Care Management and Clinical Research, Collegium Humanum Warsaw Management University Warsaw, Poland
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Tripathi DK, Nagar N, Kumar V, Joshi N, Roy P, Poluri KM. Gallate Moiety of Catechin Is Essential for Inhibiting CCL2 Chemokine-Mediated Monocyte Recruitment. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2023; 71:4990-5005. [PMID: 36942659 DOI: 10.1021/acs.jafc.3c01283] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/18/2023]
Abstract
Leukocyte recruitment witnesses an orchestrated complex formation between the chemokines and their molecular partners. CCL2 chemokine that regulates monocyte trafficking is a worthwhile system from the pharmaceutical perspective. In the current study, four major catechins (EC/EGC/ECG/EGCG) were assessed for their inhibitory potential against CCL2-regulated monocyte/macrophage recruitment. Interestingly, catechins with the gallate moiety (ECG/EGCG) could only attenuate the CCL2-induced macrophage migration. These molecules specifically bound to CCL2 on a pocket comprising the N-terminal, β0-sheets, and β3-sheets, and the binding affinity of ECGC (Kd = 22 ± 4 μM) is ∼4 times higher than that of the ECG complex (Kd = 85 ± 6 μM). MD simulation analysis evidenced that the molecular specificity/stability of CCL2-catechin complexes is regulated by multiple factors, including stereospecificity, number of hydroxyl groups on the annular ring-B, the positioning of the carbonyl group, and the methylation of the galloyl ring. Further, a significant overlap on the binding surface of CCL2 for EGCG/ECG and receptor interactions as evidenced from NMR data provided the rationale for the observed inhibition of macrophage migration in response to EGCG/ECG binding. In summary, these galloylated epicatechins can be considered as potent protein-protein interaction (PPI) inhibitors that regulate CCL2-directed leukocyte recruitment for resolving inflammatory/immunomodulatory disorders.
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Affiliation(s)
- Deepak Kumar Tripathi
- Department of Biosciences and Bioengineering, Indian Institute of Technology Roorkee, Roorkee 247667, Uttarakhand, India
| | - Nupur Nagar
- Department of Biosciences and Bioengineering, Indian Institute of Technology Roorkee, Roorkee 247667, Uttarakhand, India
| | - Viney Kumar
- Department of Biosciences and Bioengineering, Indian Institute of Technology Roorkee, Roorkee 247667, Uttarakhand, India
| | - Nidhi Joshi
- Department of Biosciences and Bioengineering, Indian Institute of Technology Roorkee, Roorkee 247667, Uttarakhand, India
| | - Partha Roy
- Department of Biosciences and Bioengineering, Indian Institute of Technology Roorkee, Roorkee 247667, Uttarakhand, India
| | - Krishna Mohan Poluri
- Department of Biosciences and Bioengineering, Indian Institute of Technology Roorkee, Roorkee 247667, Uttarakhand, India
- Centre for Nanotechnology, Indian Institute of Technology Roorkee, Roorkee 247667, Uttarakhand, India
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Retinoic acid induces hyaluronic acid production through the klotho-mediated EGFR signaling pathway in human epidermal keratinocytes. ARCH BIOL SCI 2022. [DOI: 10.2298/abs220215007c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022] Open
Abstract
All-trans retinoic acid (RA) is an effective anti-aging chemical substance
widely used in skin-care products. RA compromises epidermal differentiation
and induces keratinocyte proliferation, causing hyaluronic acid production
through mechanisms that are not completely understood. Klotho protein causes
the differentiation of human epidermal keratinocytes. Klotho gene expression
is mediated by epidermal growth factor (EGF), which inhibits cell apoptosis
in aging-related diseases. The klotho gene causes human aging syndrome,
including short lifespan, skin atrophy, and osteoporosis. We investigated
the relationship between RA and klotho in epidermal keratinocytes for the
first time. In human epidermal keratinocytes, RA induced klotho gene
expression. Treatment with both RA and recombinant klotho induced hyaluronic
acid production in human epidermal keratinocytes. However, in klotho small
interfering RNA (siRNA)-transfected keratinocytes, RA produced less
hyaluronic acid than in the control group, indicating that RA may partially
regulate hyaluronic acid production through a klotho-dependent pathway.
Knockdown of klotho gene expression inactivated the EGFR-extracellular
signal-regulated kinase (ERK) signaling pathway, which is involved in
hyaluronic acid production. We concluded that the effect of RA on hyaluronic
acid production is partly regulated through the klothomediated EGFR
signaling pathway in human epidermal keratinocytes.
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Xu FW, Lv YL, Zhong YF, Xue YN, Wang Y, Zhang LY, Hu X, Tan WQ. Beneficial Effects of Green Tea EGCG on Skin Wound Healing: A Comprehensive Review. Molecules 2021; 26:6123. [PMID: 34684703 PMCID: PMC8540743 DOI: 10.3390/molecules26206123] [Citation(s) in RCA: 35] [Impact Index Per Article: 11.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2021] [Revised: 10/02/2021] [Accepted: 10/04/2021] [Indexed: 12/18/2022] Open
Abstract
Epigallocatechin gallate (EGCG) is associated with various health benefits. In this review, we searched current work about the effects of EGCG and its wound dressings on skin for wound healing. Hydrogels, nanoparticles, micro/nanofiber networks and microneedles are the major types of EGCG-containing wound dressings. The beneficial effects of EGCG and its wound dressings at different stages of skin wound healing (hemostasis, inflammation, proliferation and tissue remodeling) were summarized based on the underlying mechanisms of antioxidant, anti-inflammatory, antimicrobial, angiogenesis and antifibrotic properties. This review expatiates on the rationale of using EGCG to promote skin wound healing and prevent scar formation, which provides a future clinical application direction of EGCG.
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Affiliation(s)
- Fa-Wei Xu
- Department of Plastic Surgery, Sir Run Run Shaw Hospital, Zhejiang University School of Medicine, 3 East Qingchun Road, Hangzhou 310016, China; (F.-W.X.); (Y.-F.Z.); (Y.-N.X.); (Y.W.); (L.-Y.Z.); (X.H.)
| | - Ying-Li Lv
- Tea Research Institute, College of Agriculture and Biotechnology, Zhejiang University, Hangzhou 310013, China;
| | - Yu-Fan Zhong
- Department of Plastic Surgery, Sir Run Run Shaw Hospital, Zhejiang University School of Medicine, 3 East Qingchun Road, Hangzhou 310016, China; (F.-W.X.); (Y.-F.Z.); (Y.-N.X.); (Y.W.); (L.-Y.Z.); (X.H.)
| | - Ya-Nan Xue
- Department of Plastic Surgery, Sir Run Run Shaw Hospital, Zhejiang University School of Medicine, 3 East Qingchun Road, Hangzhou 310016, China; (F.-W.X.); (Y.-F.Z.); (Y.-N.X.); (Y.W.); (L.-Y.Z.); (X.H.)
| | - Yong Wang
- Department of Plastic Surgery, Sir Run Run Shaw Hospital, Zhejiang University School of Medicine, 3 East Qingchun Road, Hangzhou 310016, China; (F.-W.X.); (Y.-F.Z.); (Y.-N.X.); (Y.W.); (L.-Y.Z.); (X.H.)
| | - Li-Yun Zhang
- Department of Plastic Surgery, Sir Run Run Shaw Hospital, Zhejiang University School of Medicine, 3 East Qingchun Road, Hangzhou 310016, China; (F.-W.X.); (Y.-F.Z.); (Y.-N.X.); (Y.W.); (L.-Y.Z.); (X.H.)
| | - Xian Hu
- Department of Plastic Surgery, Sir Run Run Shaw Hospital, Zhejiang University School of Medicine, 3 East Qingchun Road, Hangzhou 310016, China; (F.-W.X.); (Y.-F.Z.); (Y.-N.X.); (Y.W.); (L.-Y.Z.); (X.H.)
| | - Wei-Qiang Tan
- Department of Plastic Surgery, Sir Run Run Shaw Hospital, Zhejiang University School of Medicine, 3 East Qingchun Road, Hangzhou 310016, China; (F.-W.X.); (Y.-F.Z.); (Y.-N.X.); (Y.W.); (L.-Y.Z.); (X.H.)
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Abadie S, Leduc C, Lintner K, Bedos P. The alkaloid centcyamine increases expression of klotho and lamin B1, slowing the onset of skin ageing in vitro and in vivo. Int J Cosmet Sci 2021; 43:561-572. [PMID: 34403147 DOI: 10.1111/ics.12731] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2021] [Revised: 07/07/2021] [Accepted: 08/04/2021] [Indexed: 11/26/2022]
Abstract
BACKGROUND Klotho is a protein known for its beneficial effects on longevity. Centcyamine is an alkaloid present in certain plants whose extracts have an anti-inflammatory effect. Skin fibroblasts are essential to the formation and structure of the dermis. OBJECTIVE Centcyamine is an indole-based alkaloid composed of coumaric acid, a resveratrol precursor and methoxytryptamine, which can be both a precursor, or a derivative, of melatonin. Given these building blocks and their well-known bioactivities, it was of interest to explore the potential benefits of using this aryl-alkaloid, in cosmetic skincare applications. METHODS We tested cultured normal human dermal fibroblasts (NHDF) in vitro to observe how supplementation with centcyamine improves properties of the cells to counteract the effect of ageing. The expression of genes and proteins of interest was quantified. The effect on doubling time and cell function was evaluated following treatment of the cells over several replication cycles. Skin firmness, red spot index and skin isotropy were measured with Dynaskin® , Visia® and Primos® equipment, respectively, and compared over two months in a vehicle-controlled clinical trial on 60 persons. RESULTS Centcyamine activates the expression of the gene KL and the related protein Klotho in dermal fibroblasts. Moreover, centcyamine slows the replicative ageing process of fibroblasts in culture. These cells retain cellular functions identical to those of young cells: the synthesis of lamin B1, a crucial regulatory protein of proliferation, as well as of collagen I and elastin is retained in aged cells. The clinical data are shown to improve skin isotropy in a majority of subjects, to reduce the red spot intensity and to maintain skin firmness in the treated group vs. the vehicle. CONCLUSION The alkaloid centcyamine induces changes in the metabolism of the ageing process of human dermal fibroblasts. The up-to-now unobserved implication of both Klotho and lamin B1 to maintain homeostasis of the skin opens new venues for the prevention of age-related changes in skin structure. The in vitro and clinical data, while not demonstrated to be causally related, converge towards a common goal of skin repair and slower ageing processes.
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Olauson H, Mencke R, Hillebrands JL, Larsson TE. Tissue expression and source of circulating αKlotho. Bone 2017; 100:19-35. [PMID: 28323144 DOI: 10.1016/j.bone.2017.03.043] [Citation(s) in RCA: 68] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/08/2016] [Revised: 03/15/2017] [Accepted: 03/16/2017] [Indexed: 12/16/2022]
Abstract
αKlotho (Klotho), a type I transmembrane protein and a coreceptor for Fibroblast Growth Factor-23, was initially thought to be expressed only in a limited number of tissues, most importantly the kidney, parathyroid gland and choroid plexus. Emerging data may suggest a more ubiquitous Klotho expression pattern which has prompted reevaluation of the restricted Klotho paradigm. Herein we systematically review the evidence for Klotho expression in various tissues and cell types in humans and other mammals, and discuss potential reasons behind existing conflicting data. Based on current literature and tissue expression atlases, we propose a classification of tissues into high, intermediate and low/absent Klotho expression. The functional relevance of Klotho in organs with low expression levels remain uncertain and there is currently limited data on a role for membrane-bound Klotho outside the kidney. Finally, we review the evidence for the tissue source of soluble Klotho, and conclude that the kidney is likely to be the principal source of circulating Klotho in physiology.
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Affiliation(s)
- Hannes Olauson
- Division of Renal Medicine, Department of Clinical Science, Intervention and Technology, Karolinska Institutet, Stockholm, Sweden.
| | - Rik Mencke
- Division of Pathology, Department of Pathology and Medical Biology, University of Groningen, University Medical Center Groningen, Groningen, The Netherlands
| | - Jan-Luuk Hillebrands
- Division of Pathology, Department of Pathology and Medical Biology, University of Groningen, University Medical Center Groningen, Groningen, The Netherlands
| | - Tobias E Larsson
- Division of Renal Medicine, Department of Clinical Science, Intervention and Technology, Karolinska Institutet, Stockholm, Sweden
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