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Cuyler M, Twilley D, Thipe VC, Mandiwana V, Kalombo ML, Ray SS, Rikhotso-Mbungela RS, Janse van Vuuren A, Coetsee W, Katti KV, Lall N. Antihistamine and Wound Healing Potential of Gold Nanoparticles Synthesized Using Bulbine frutescens (L.) Willd. Nanotechnol Sci Appl 2024; 17:59-76. [PMID: 38504832 PMCID: PMC10949377 DOI: 10.2147/nsa.s445116] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2023] [Accepted: 02/22/2024] [Indexed: 03/21/2024] Open
Abstract
Background Atopic dermatitis (eczema) is an inflammatory skin condition with synthetic treatments that induce adverse effects and are ineffective. One of the proposed causes for the development of the condition is the outside-in hypothesis, which states that eczema is caused by a disruption in the skin barrier. These disruptions include developing dry cracked skin, which promotes the production of histamine. Bulbine frutescens (BF) is traditionally used to treat wounds and eczema; however, limited research has been conducted to scientifically validate this. Furthermore, gold nanoparticles (AuNPs) have been used to repair damaged skin; however, no research has been conducted on AuNPs synthesized using BF. Purpose The study aimed to determine whether BF alleviated skin damage through wound healing, reducing the production of histamine and investigate whether AuNPs synthesized using BF would enhance biological activity. Methods Four extracts and four synthesized AuNPs were prepared using BF and their antiproliferative and wound healing properties against human keratinocyte cells (HaCaT) were evaluated. Thereafter, the selected samples antiproliferative activity and antihistamine activity against phorbol 12-myristate 13-acetate (PMA) stimulated granulocytes were evaluated. Results Of the eight samples, the freeze-dried leaf juice (BFE; p < 0.01) extract and its AuNPs (BFEAuNPs; p < 0.05) displayed significant wound closure at 100 µg/mL and were further evaluated. The selected samples displayed a fifty percent inhibitory concentration (IC50) of >200 µg/mL against PMA stimulated granulocytes. Compared to the untreated (media with PMA) control (0.30 ± 0.02 ng/mL), BFEAuNPs significantly inhibited histamine production at a concentration of 100 (p < 0.01) and 50 µg/mL (p < 0.001). Conclusion BFE and BFEAuNPs stimulated wound closure, while BFEAuNPs significantly inhibited histamine production. Further investigation into BFEAuNPs in vivo wound healing activity and whether it can target histamine-associated receptors on mast cells as a potential mechanism of action should be considered.
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Affiliation(s)
- Marizé Cuyler
- Department of Plant and Soil Sciences, University of Pretoria, Pretoria, Gauteng, 0002, South Africa
| | - Danielle Twilley
- Department of Plant and Soil Sciences, University of Pretoria, Pretoria, Gauteng, 0002, South Africa
| | - Velaphi C Thipe
- Department of Radiology, Institute of Green Nanotechnology, University of Missouri, Columbia, MO, 65212, USA
| | - Vusani Mandiwana
- Chemical Cluster Centre for Nanostructures and Advanced Materials, Council for Scientific and Industrial Research, Pretoria, 0001, South Africa
| | - Michel L Kalombo
- Chemical Cluster Centre for Nanostructures and Advanced Materials, Council for Scientific and Industrial Research, Pretoria, 0001, South Africa
| | - Suprakas S Ray
- DST/CSIR National Centre for Nanostructured Materials, Council for Scientific and Industrial Research, Pretoria, 0001, South Africa
| | | | - Arno Janse van Vuuren
- Centre for High Transmission Electron Microscopy, Nelson Mandela University, Port Elizabeth, 6031, South Africa
| | - Will Coetsee
- Botanica Natural Products Pty (Ltd), Canterbury Farm MR 254, Alldays, Limpopo, 0909, South Africa
| | - Kattesh V Katti
- Department of Radiology, Institute of Green Nanotechnology, University of Missouri, Columbia, MO, 65212, USA
| | - Namrita Lall
- Department of Plant and Soil Sciences, University of Pretoria, Pretoria, Gauteng, 0002, South Africa
- School of Natural Resources, University of Missouri, Columbia, MO, 65211, USA
- College of Pharmacy, JSS Academy of Higher Education and Research, Mysuru, Karnataka, 570015, India
- Bio-Tech Research and Development Institute, University of the West Indies 770, Kingston, Jamaica
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A Sebum-Mimetic Lipid Monolayer and Its Interaction with (Bio)Surfactants. COLLOIDS AND INTERFACES 2022. [DOI: 10.3390/colloids6020037] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/10/2022]
Abstract
Surfactants present in cleansing formulations interact not only with the unwanted lipids accumulating on the human skin (dirt) but also with its protective lipidic layer (sebum). Development of simple models of human sebum would help to compare different surfactants and biosurfactants under the same conditions. In this contribution we propose a first monolayer model of synthetic sebum composed of lard, stearic acid, lanolin, squalane and cholesterol. The monolayer compression isotherm features a gas-liquid (G-LE1), two liquid-liquid transitions (LE1-LE2 and LE2-LC), and a collapse at πcoll = 45 mN/m. The monolayer spread on pure water and pre-compressed to π0 = 30 mN/m was exposed to four synthetic surfactants (sodium lauryl sulfate (SLS), sodium laureth sulfate (SLES), ammonium lauryl sulfate (ALS) and cocamidopropyl betaine (CAPB)) and four plant extracts (oat (Avena sativa L.), horse chestnut (Aesculus hippocastanum L.), cowherb (Vaccaria hispanica [P. Mill.] Rauschert), soybean (Glycine max L.) and soapwort (Saponaria officinalis L.)) introduced to the subphase at a dry mass content of 1% (w/w). Three modes of the monolayer-(bio)surfactant interactions were observed: (1) complete solubilization (SLS, SLES, ALS, CAPB); (2) penetration accompanied by an increase of surface pressure and elasticity but without solubilization (horse chestnut, cowherb, soapwort); (3) no interaction (oat, soybean).
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