Bantfu:Motsa0615/Kukhanyisa sikhumba
Kukhanyisa sikhumba[notes 1] ngumkhuba wekusebentisa timonyu, emakhatsakhatsa, kumbe letinye tindlela tekwenta sikhumba sibe mhlophe. Imitsi yekukhanyisa sikhumba isebenta ngekwehlisa linani melanin yesikhumba. Imitsi leminyenti ikhonjisiswe kutsi inemandla ekukhanyiseni sikhumba, leminye inemitselela lenemvuzo (sib..: ema-antioxidant,[1] tondlamtimba, kumbe yehlise bungoti betinhlobo tsite temdlavuza); leminye yalemitsi inebungoti lobukhulu emphilweni (sibonelo, timonyo letinemekhuri).
Umsebenti
[hlela | edit source]Tindzawo letitsite letishe kakhulu tinebumnyama lobendlulele njengemabla e-lentigo , tinsumpe nemkhango tingakhanyiswa kute umbala wato uhambisane newesikhumba lesimadvutane. Mayelana nekucateka, sikhumba lesingakacateki singakhanyiswa kwentelwe kutsi kube nekufanana kwesikhumba sonkhe.[2]
Discovery and design
[hlela | edit source]Melanogenesis inhibitors have been discovered and developed through several methods, including: screening of synthetic chemical libraries (high throughput screening is occasionally used), screening of plant extracts,[3] computational (in silico) search,[4][5] found as a side effect of previously known drugs[6][7][8][9] and exploration of structural analogues of previously known tyrosinase inhibitors[10][11] based on knowledge (in varying degrees) of their structure-activity relationship. Thus, the development and discovery of melanogenesis inhibitors illustrates many of the methods used in drug design. Some of the most potent competitive reversible tyrosinase inhibitors are synthetic compounds with a potency hundreds of times that of kojic acid.
Mechanisms of action
[hlela | edit source]- ↑ Instead of "whitening", the terms "lightening", "brightening", "depigmentation" and "bleaching" are also used.
References
[hlela | edit source]- ↑ Empty citation (help) No-cost access and free license (CC BY 4.0).
- ↑ skin-lightening uses
- ↑ Chang, Te-Sheng (2009). "An Updated Review of Tyrosinase Inhibitors". Int. J. Mol. Sci. 10 (6): 2440–2475. PMC 2705500. PMID 19582213. doi:10.3390/ijms10062440. iThempleti:Lref
- ↑ Empty citation (help) Restricted access.
- ↑ Empty citation (help) No-cost access and free license (CC BY 4.0).
- ↑ Empty citation (help) No-cost access but non-free license.
- ↑ Empty citation (help) No-cost access and free license (CC BY 4.0).
- ↑ Empty citation (help) Restricted access.
- ↑ Espín, Juan Carlos; Wichers, Harry J. (2001). "Effect of captopril on mushroom tyrosinase activity in vitro". Biochim. Biophys. Acta 1544 (1-2): 289–300. PMID 11341938. doi:10.1016/s0167-4838(00)00230-2. iThempleti:Lref
- ↑ Empty citation (help) No-cost access and free license (CC BY 4.0).
- ↑ Empty citation (help) No-cost access and free license (CC BY 3.0).
- Chang, Te-Sheng (2012). "Natural Melanogenesis Inhibitors Acting Through the Down-Regulation of Tyrosinase Activity". Materials 5 (9): 1661–1685. doi:10.3390/ma5091661. iThempleti:Lref
- Chen, Hongxiang; Weng, Qing Y.; Fisher, David E. (2014). "UV Signaling Pathways within the Skin". J. Invest. Dermatol. 134 (4): 2080–2085. PMC 4102648. PMID 24759085. doi:10.1038/jid.2014.161. iThempleti:Lref
- D'Orazio, John; Jarrett, Stuart; Amaro-Ortiz, Alexandra; Scott, Timothy (2013). "UV Radiation and the Skin". Int. J. Mol. Sci. 14 (6): 12222–12248. PMC 3709783. PMID 23749111. doi:10.3390/ijms140612222. iThempleti:Lref
- Ebanks, Jody P.; Wickett, R. Randall; Boissy, Raymond E. (2009). "Mechanisms Regulating Skin Pigmentation: The Rise and Fall of Complexion Coloration". Int. J. Mol. Sci. 10 (9): 4066–4087. PMC 2769151. PMID 19865532. doi:10.3390/ijms10094066. iThempleti:Lref
- Imokawa, Genji; Ishida, Koichi (2014). "Inhibitors of Intracellular Signaling Pathways that Lead to Stimulated Epidermal Pigmentation: Perspective of Anti-Pigmenting Agents". Int. J. Mol. Sci. 15 (5): 8293–8315. PMC 4057732. PMID 24823877. doi:10.3390/ijms15058293. iThempleti:Lref
- Nelson, Andrew A.; Tsao, Hensin (2009). "Melanoma and genetics". Clin. Dermatol. 27 (1): 46–52. PMID 19095153. doi:10.1016/j.clindermatol.2008.09.005. iThempleti:Lref
- Jung, Eunsun; Lee, Jung-A; Shin, Seoungwoo; Roh, Kyung-Baeg; Kim, Jang-Hyun; Park, Deokhoon (2013). "Madecassoside Inhibits Melanin Synthesis by Blocking Ultraviolet-Induced Inflammation". Molecules 18 (12): 15724–36. PMID 24352025. doi:10.3390/molecules181215724. iThempleti:Lref
- Kondo, Taisuke; Hearing, Vincent J. (2011). "Update on the regulation of mammalian melanocyte function and skin pigmentation". Expert. Rev. Dermatol. 6 (1): 97–108. PMC 3093193. PMID 21572549. doi:10.1586/edm.10.70. iThempleti:Lref
- Lee, Ai-Young; Noh, Minsoo (2013). "The regulation of epidermal melanogenesis via cAMP and/or PKC signaling pathways: insights for the development of hypopigmenting agents". Arch. Pharm. Res. 36 (7): 792–801. PMID 23604723. doi:10.1007/s12272-013-0130-6. iThempleti:Lref
- Makino-Okamura, Chieko (2014). "Heparin inhibits melanosome uptake and inflammatory response coupled with phagocytosis through blocking PI3k/Akt and MEK/ERK signaling pathways in human epidermal keratinocytes". Pigment Cell Melanoma Res. 27 (6): 1063–74. PMID 24961476. doi:10.1111/pcmr.12287. iThempleti:Lref
- Rodríguez, Carlos Iván; Setaluri, Vijayasaradhi (2014). "Cyclic AMP (cAMP) signaling in melanocytes and melanoma". Arch. Biochem. Biophys. 563: 22–7. PMID 25017568. doi:10.1016/j.abb.2014.07.003. iThempleti:Lref
- Slominski, Andrzej; Tobin, Desmond J.; Shibahara, Shigeki; Wortsman, Jacobo (2004). "Melanin Pigmentation in Mammalian Skin and its Hormonal Regulation". Physiol. Rev. 84 (4): 1155–228. PMID 15383650. doi:10.1152/physrev.00044.2003. iThempleti:Lref
- Smit, Nico; Vicanova, Jana; Pavel, Stan (2009). "The Hunt for Natural Skin Whitening Agents". Int. J. Mol. Sci. 10 (12): 5326–5349. PMC 2801997. PMID 20054473. doi:10.3390/ijms10125326. iThempleti:Lref
- Wu, Wufeng; Hammer, John A. (2014). "Melanosome transfer: It is best to give and receive". Curr. Opin. Cell Biol. 29: 1–7. PMC 4130791. PMID 24662021. doi:10.1016/j.ceb.2014.02.003. iThempleti:Font color
- Yamaguchi, Yuji; Hearing, Vincent J. (2009). "Physiological factors that regulate skin pigmentation". BioFactors 35 (2): 193–199. PMC 2793097. PMID 19449448. doi:10.1002/biof.29. iThempleti:Lref