• The Journal of Korean Medicine Ophthalmology and Otolaryngology and Dermatology
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• v.31 no.1
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• pp.32-41
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• 2018

Objectives : Hyaluronic acid(HA) is a mucopolysaccharide, occuring naturally in living organisms. It is one of the most hydrophilic molecules, so it has been known as being related to skin hydration and skin aging. The purpose of this study is to examine the effects of Angelica gigas(A. gigas) ethanol extract on hyaluronic acid synthesis. Methods : To determine cytotoxicity and hyaluronic acid synthase 2 gene expression, hyaluronic acid production in HaCaT cells, MTT assay and RT-PCR ELISA was used. Results : There were no cytotoxicity in $50{\mu}g/ml$ concentration A. gigas extract in MTT assay. Hyaluronic acid synthase 2(HAS2) gene expression was increased by all treated concentration A. gigas extract. Hyaluronic acid production was higher than control group in $50{\mu}g/ml$ & $100{\mu}g/ml$ concentration A. gigas extract. Conclusions : Hyaluronic acid production was increased by A. gigas extracts. Therefore, We suggest that A. gigas can make a contribution to the moisturizing effect on human skin.

• The Journal of Korean Medicine Ophthalmology and Otolaryngology and Dermatology
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• v.28 no.1
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• pp.32-40
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• 2015

Objectives : Hyaluronic acid(HA) is a mucopolysaccharide, occuring naturally in living organisms. It is one of the most hydrophilic molecules, so it has been known as being related to skin hydration and anti-aging. The purpose of this study is to examine the effects of Angelica acutiloba ethanol extract on hyaluronic acid synthesis. Methods : To determine cytotoxicity and hyaluronic acid synthase 2 gene expression, hyaluronic acid production in HaCaT cells, MTT assay and RT-PCR ELISA was used. Results : There was no cytotoxicity in $50{\mu}g/ml$ concentration Angelica acutiloba extract in MTT assay. Hyaluronic acid synthase 2(HAS2) gene expression was increased by all treated concentration Angelica acutiloba extract. Hyaluronic acid production was higher in $50{\mu}g/ml$ & $100{\mu}g/ml$ concentration Angelica acutiloba extract than control group. Conclusions : Hyaluronic acid production was increased by Angelica Acutiloba extracts. Therefore, We suggest that Angelica acutiloba can make a contribution to the moisturing effect on human skin. Conclusions : Hyaluronic acid production was increased by Angelica Acutiloba extracts. Therefore, We suggest that Angelica acutiloba can make a contribution to the moisturing effect on human skin.

• Journal of Biomedical Engineering Research
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• v.38 no.1
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• pp.1-8
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• 2017

The successful synthesis of hyaluronic acid micro-threads is very promising approach for the broad application in tissue engineering such as dermal fillers. Because hyaluronic acid has the excellent biocompatibility and ability to maintain the moisture of up to several hundred times its own weight. In order to generate the hyaluronic acid micro-threads in microfluidic system, we employed two-phase flow microfluidic chip to make a rapid synthesis of the hyaluronic acid hydrogel. Hyaluronic acid was mixed with 0.02N NaOH solution and 1, 4-Butanediol diglycidyl ether (BDDE) solution and then injected into core channel. The ethanol was used for the 3-dimensional micro-thread formation in sheath channel. We manipulated the diameter of HA micro-threads using controlling of flow rates in microfluidic chip, and showed the feasibility of immobilization in HA micro-threads with florescent substances. Also, the generated HA micro-threads were evaluated and showed the suitable properties with tensile strength, bending property, and swelling profiles for dermal fillers. As a result, we suggested an innovative method for microfluidic chip-based HA micro-threads which could safely be applied as dermal filler in tissue engineering.

• Journal of the Society of Cosmetic Scientists of Korea
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• v.50 no.3
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• pp.251-259
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• 2024

The skin barrier plays an important role in maintaining healthy skin by preventing external irritation and water loss in the body. In the skin, hyaluronic acid (HA) is synthesized by the enzyme hyaluronic acid synthase (HAS), which functions as a natural moisturizing factor and is involved in maintaining water retention and barrier function. Therefore, in this study, the effect of the Prunus yedoensis bark ethyl acetate fraction (PYBEAF) on HA synthesis in HaCaT cells was confirmed. Cytotoxicity evaluation was performed through MTT assay, and the amount of HA synthesis in HaCaT cells was confirmed through ELISA through PYBEAF treatment. The levels of HAS-2, HAS-3 mRNA expression were analyzed using qRT-PCR, and the protein expression level and signaling pathway were confirmed through western blotting. Consequently, PYBEAF was involved in the MAPK and CREB signaling pathways, increasing the amount of HA production through HAS-2 synthesis. This suggests that PYBEAF is effective in improving barrier function by increasing HA synthesis, which plays an important role in moisturizing and maintaining skin moisture.

• Journal of Radiation Industry
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• v.8 no.2
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• pp.77-81
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• 2014

Hyaluronic acid is a disaccharide polymer that consists of glucuronic acid and N-acetylglucosamine, and is a glycosaminoglycan. It is widely distributed in animal connective tissue, coexisting with chondroitin sulfate. It forms viscous secretions or gel by bonding to protein in the body, and thus maintains and lubricates tissue structures. In addition, its antibiotic properties are applied to cosmetics and pharmaceuticals. Therefore, it has recently been an object of great interest at cosmetic and pharmaceutical companies. $^{125}I$ has a longer half-life (59.4 days) than many other radioisotopes, and is therefore useful to long-term studies. In this study, a facile and efficient procedure for the synthesis of $^{125}I$-labeled hyaluronic acid has been designed for in vivo imaging and pharmacokinetic studies of hyaluronic acid, which are required for the development of new drugs.

• Applied Chemistry for Engineering
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• v.33 no.6
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• pp.557-562
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• 2022

Hyaluronic acid (HA) is a mucopolysaccharide, occurring naturally in living organisms. It is one of the most hydrophilic molecules, so it has been known as being related to skin hydration and skin aging. The purpose of this study was to examine the effects of Cimicifuga heracleifolia ethanol extract on the hyaluronic acid synthesis and the inhibition of hyaluronidase activity. To determine cytotoxicity, hyaluronic acid synthase 2 (HAS2) gene expression, HA production and, hyaluronidase inhibitory effects, 3-(4,5-dimethylthiazol-2-ly)-2,5-diphenyl tetrazolium bromide (MTT) assay, real time - polymerase chain reaction (RT-PCR), hyaluronic acid enzyme linked immunosorbent assay (HA-ELISA), and hyaluronidase assay were used, respectively. When the Cimicifuga heracleifolia extract was treated in the HaCaT cells up to 500 ㎍/mL concentration, cytotoxicity was confirmed by the Cimicifuga heracleifolia extract at concentrations above 200 ㎍/mL. Therefore, the optimum concentration of all experiments used in this study was determined to be 200 ㎍/mL. HAS2 gene expression increased by Cimicifuga heracleifolia extract in a concentration-dependent manner at all treatment concentrations. The production rate of HA was tended to decrease at the highest concentration of 200 ㎍/mL. The hyaluronidase activity inhibition effect of Cimicifuga heracleifolia extract was very high compared to the control group. Based on these results, Cimicifuga heracleifolia extract was expected to have a moisturizing effect on human skin and special attention should be paid to the determination of the concentration of Cimicifuga heracleifolia when developing cosmetic materials using it.

• Proceedings of the Polymer Society of Korea Conference
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• 2006.10a
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• pp.183-183
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• 2006

Hyaluronic acid and chitosan-based poly(ethylene oxide) (HA-PEO and Chitosan-PEO) hydrogels have been employed as unique biomedical polymeric materials with properties such as bioactivity from polysaccharide, biocompatibility of HA and chitosan as well as PEO and control release of bioactive molecules from the hydrogel itself. We here examine in situ hydrogels based on hyaluronic acid and chitosan in terms of their synthesis, mechanical properties, morphologies and in vitro cellular interactions on their surface and inside. In vivo bone regeneration of HA-PEO and Chitosan-PEO hydrogels was compared with in mouse model.

• Proceedings of the Membrane Society of Korea Conference
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• 2005.11a
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• pp.165-165
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• 2005

• Polymer(Korea)
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• v.29 no.5
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• pp.445-450
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• 2005

Hyaluronic acid-based beads were prepared in order to develop a biomedical material for augumentation. Hyaluronic acid was crosslinked by 1,3-butadiene diepoxide in a suspension state maintained by rapid mixing of soybeen oil and hyaluronic acid solution. The particle size, surface area and swelling ratio were measured to investigate the physical properties of the synthesized beads and the bead surface was examined by scanning electron microscopy. The beads were formed in the range of $5-12vol\%$ concentration of crosslinking agent, which showed monodisperse size distribution. Both BET surface area and swelling ratio decreased as the concentration of either hyaluronic acid or crosslinking agent increased, and crosslinking temperature decreased. Bead size could be effectively controlled by mixing speed without affecting other physical property.

• Journal of the Korean Association of Oral and Maxillofacial Surgeons
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• v.28 no.3
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• pp.216-225
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• 2002

Hyaluronic acid (HA) is an almost essential component of extracellular matrices. Early in embryogenesis mesenchymal cells migrate, proliferate and differentiate, in part, because of the influence of HA. Since the features of embryogenesis are revisited during wound repair, including bone fracture repair, this study was initiated to evaluate whether HA has an effect on calcification and bone formation in an in vitro system of osteogenesis. Mouse calvaria Pre-osteoblast (MC3T3-E1) cells were cultured in ${\alpha}-MEM$ medium with microorganism-derivative hyaluronic acid that was produced by Strep. zooepidemicus which of molecular weight was 3 million units. The dosages were categorized in each 0.5, 1.0 and 2.0 mg/ml concentration experimental groups. After 2 and 4 days cultures in expeirmental and control groups, the tendency of cell proliferation, MTT assay, protein synthesis ability, collagen synthesis and alkaline phosphatase activity were analysed and bone nodule formation capacity were measured with Alizarin Red S stain after 29 days cultures. The cell proliferation was increased in time, especially the group of 0.5 and 1.0 mg/ml concentration of HA were showed prominent cell proliferation. After 2 and 4 days culture, experimental groups in general were greater cell activity in MTT assay. The protein synthesis was increased in all experimental groups compared to control group, especially most prominent in 1.0 mg/ml concentration group. The collagen synthesis capacity were increased in HA experimental groups, especially prominent in 1.0 mg/ml group and the activity of alkaline phosphatase were increased, especially also prominent in 1.0 mg/ml group, compared to control group. Above these, the activity of mouse carvarial pre-osteoblast cells was showed greater bone osteogenesis activity in all applied HA experimental group, especially group of 1.0 mg/ml concentration of HA.