Combination of Pinocembrin and Epidermal Growth Factor Enhances the Proliferation and Survival of Human Keratinocytes. 2023

Jirapak Ruttanapattanakul, and Nitwara Wikan, and Saranyapin Potikanond, and Wutigri Nimlamool
Department of Pharmacology, Faculty of Medicine, Chiang Mai University, Chiang Mai 50200, Thailand.

Re-epithelialization is delayed in aged skin due to a slow rate of keratinocyte proliferation, and this may cause complications. Thus, there has been development of new therapies that increase treatment efficacy for skin wounds. Epidermal growth factor (EGF) has been clinically used, but this agent is expensive, and its activity is less stable. Therefore, a stable compound possessing EGF-like properties may be an effective therapy, especially when combined with EGF. The current study discovered that pinocembrin (PC) effectively synergized with EGF in increasing keratinocyte viability. The combination of PC and EGF significantly enhanced the proliferation and wound closure rate of the keratinocyte monolayer through activating the phosphorylation of ERK and Akt. Although these effects of PC were like those of EGF, we clearly proved that PC did not transactivate EGFR. Recent data from a previous study revealed that PC activates G-protein-coupled receptor 120 which further activates ERK1/2 and Akt phosphorylation. Therefore, this clearly indicates that PC possesses a unique property to stimulate the growth and survival of keratinocytes through activating a different receptor, which subsequently conveys the signal to cross-talk with the effector kinases downstream of the EGFR, suggesting that PC is a potential compound to be combined with EGF.

UI MeSH Term Description Entries
D010766 Phosphorylation The introduction of a phosphoryl group into a compound through the formation of an ester bond between the compound and a phosphorus moiety. Phosphorylations
D004815 Epidermal Growth Factor A 6-kDa polypeptide growth factor initially discovered in mouse submaxillary glands. Human epidermal growth factor was originally isolated from urine based on its ability to inhibit gastric secretion and called urogastrone. Epidermal growth factor exerts a wide variety of biological effects including the promotion of proliferation and differentiation of mesenchymal and EPITHELIAL CELLS. It is synthesized as a transmembrane protein which can be cleaved to release a soluble active form. EGF,Epidermal Growth Factor-Urogastrone,Urogastrone,Human Urinary Gastric Inhibitor,beta-Urogastrone,Growth Factor, Epidermal,Growth Factor-Urogastrone, Epidermal,beta Urogastrone
D006801 Humans Members of the species Homo sapiens. Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man
D000368 Aged A person 65 years of age or older. For a person older than 79 years, AGED, 80 AND OVER is available. Elderly
D015603 Keratinocytes Epidermal cells which synthesize keratin and undergo characteristic changes as they move upward from the basal layers of the epidermis to the cornified (horny) layer of the skin. Successive stages of differentiation of the keratinocytes forming the epidermal layers are basal cell, spinous or prickle cell, and the granular cell. Keratinocyte
D049109 Cell Proliferation All of the processes involved in increasing CELL NUMBER including CELL DIVISION. Cell Growth in Number,Cellular Proliferation,Cell Multiplication,Cell Number Growth,Growth, Cell Number,Multiplication, Cell,Number Growth, Cell,Proliferation, Cell,Proliferation, Cellular
D051057 Proto-Oncogene Proteins c-akt Protein-serine-threonine kinases that contain PLECKSTRIN HOMOLOGY DOMAINS and are activated by PHOSPHORYLATION in response to GROWTH FACTORS or INSULIN. They play a major role in cell metabolism, growth, and survival as a core component of SIGNAL TRANSDUCTION. Three isoforms have been described in mammalian cells. akt Proto-Oncogene Protein,c-akt Protein,AKT1 Protein Kinase,AKT2 Protein Kinase,AKT3 Protein Kinase,Akt-alpha Protein,Akt-beta Protein,Akt-gamma Protein,Protein Kinase B,Protein Kinase B alpha,Protein Kinase B beta,Protein Kinase B gamma,Protein-Serine-Threonine Kinase (Rac),Proto-Oncogene Protein Akt,Proto-Oncogene Protein RAC,Proto-Oncogene Proteins c-akt1,Proto-Oncogene Proteins c-akt2,Proto-Oncogene Proteins c-akt3,RAC-PK Protein,Rac Protein Kinase,Rac-PK alpha Protein,Rac-PK beta Protein,Related to A and C-Protein,c-akt Proto-Oncogene Protein,Akt alpha Protein,Akt beta Protein,Akt gamma Protein,Akt, Proto-Oncogene Protein,Protein, akt Proto-Oncogene,Protein, c-akt Proto-Oncogene,Proteins c-akt1, Proto-Oncogene,Proteins c-akt2, Proto-Oncogene,Proteins c-akt3, Proto-Oncogene,Proto Oncogene Protein Akt,Proto Oncogene Protein RAC,Proto Oncogene Proteins c akt,Proto Oncogene Proteins c akt1,Proto Oncogene Proteins c akt2,Proto Oncogene Proteins c akt3,Proto-Oncogene Protein, akt,Proto-Oncogene Protein, c-akt,RAC PK Protein,RAC, Proto-Oncogene Protein,Rac PK alpha Protein,Rac PK beta Protein,Related to A and C Protein,akt Proto Oncogene Protein,alpha Protein, Rac-PK,c akt Proto Oncogene Protein,c-akt, Proto-Oncogene Proteins,c-akt1, Proto-Oncogene Proteins,c-akt2, Proto-Oncogene Proteins,c-akt3, Proto-Oncogene Proteins
D066246 ErbB Receptors A family of structurally related cell-surface receptors that signal through an intrinsic PROTEIN-TYROSINE KINASE. The receptors are activated upon binding of specific ligands which include EPIDERMAL GROWTH FACTORS, and NEUREGULINS. EGF Receptor,Epidermal Growth Factor Receptor,Epidermal Growth Factor Receptor Family Protein,Epidermal Growth Factor Receptor Protein-Tyrosine Kinase,ErbB Receptor,HER Family Receptor,Receptor, EGF,Receptor, Epidermal Growth Factor,Receptor, TGF-alpha,Receptor, Transforming-Growth Factor alpha,Receptor, Urogastrone,Receptors, Epidermal Growth Factor-Urogastrone,TGF-alpha Receptor,Transforming Growth Factor alpha Receptor,Urogastrone Receptor,c-erbB-1 Protein,erbB-1 Proto-Oncogene Protein,EGF Receptors,Epidermal Growth Factor Receptor Family Proteins,Epidermal Growth Factor Receptor Kinase,HER Family Receptors,Proto-oncogene c-ErbB-1 Protein,Receptor Tyrosine-protein Kinase erbB-1,Receptor, ErbB-1,Receptors, Epidermal Growth Factor,Epidermal Growth Factor Receptor Protein Tyrosine Kinase,ErbB-1 Receptor,Family Receptor, HER,Family Receptors, HER,Proto oncogene c ErbB 1 Protein,Proto-Oncogene Protein, erbB-1,Receptor Tyrosine protein Kinase erbB 1,Receptor, ErbB,Receptor, ErbB 1,Receptor, HER Family,Receptor, TGF alpha,Receptor, Transforming Growth Factor alpha,Receptors, EGF,Receptors, Epidermal Growth Factor Urogastrone,Receptors, ErbB,Receptors, HER Family,c erbB 1 Protein,c-ErbB-1 Protein, Proto-oncogene,erbB 1 Proto Oncogene Protein

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