推 antioxidant : A酸存在肝臟可長達2年之久..02/21 13:06
推 mandychou : 驚!!!請問樓上的論點從何而來,謝謝...02/21 14:11
A酸應該是以A醇的結構儲存在肝臟才對...=.=
找了2篇文章,一篇是文獻,一篇是書,2篇都各有引用的文獻
以下指的都是口服A酸,外用A酸似乎沒有這些困擾..
1.Ramos-e-Silva M, Hexsel DM, Rutowitsch MS, Zechmeister M. Hydroxy acids and
retinoids in cosmetics. Clin Dermatol. 2001 Jul-Aug;19(4):460-6.
463頁
Meals, particularly those with fat content, improve retinoid absorption.
Because of its lipid solubility, etretinate has extensive and prolonged
storage in fat resulting in a serum half life of 80–160 days. Upon
discontinuing the drug, a low level may be detected in the blood for 2 years
or more[1]Retinol released from the liver is carried in the circulatory
system by plasma retinol-binding proteins.
從肝臟釋放出的A醇在結束口服治療2年或更久時間後,仍有少量能在血液中被檢測到。
2.T. Krieg et al. (eds.), Therapy of Skin Diseases:A Worldwide Perspective
on Therapeutic Approaches and Their Molecular Basis, 2010
80頁
Women of childbearing potential who have been treated with acitretin must
continue using contraception for 3 years in view of its teratogenic effects
[2] .
有懷孕可能的女生在中止口服acitretin治療後,最好持續避孕3年
83頁
One major side effect of all retinoids is teratogenicity, especially in early
pregnancy which can persist for up to 2 years after cessation of orally
administered retinoids such as etretinate which may persist in the body for
several years.
所有A酸有致畸性,在口服A酸中止後,A酸留在身體裡的時間可能長達2年,etretinate甚
至可能更久。
引用文獻:
1. Saurat JH. Systemic retinoids. What's new? Dermatol Clin. 1998
Apr;16(2):331-40.
2. van de Kerkhof PC (2006) Update on retinoid therapy of psoriasis in: an
update on the use of retinoids in dermatology. Dermatol Ther 19(5):252–263
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推 Olalalalala : 專業推02/21 19:06
推 sarah32kimo : 專業推02/21 21:41
→ sleepmilk : 推,原來A酸如此可怕。02/21 22:15
推 flawlessday : 推。A酸的致畸是指胎兒吧,所以使用口服A酸一定要避02/21 22:20
指胎兒沒錯
→ flawlessday : 孕;但比起A酸,我覺得深海魚的重金屬累積或是作物 02/21 22:20
→ flawlessday : 農藥殘留更可怕…02/21 22:20
推 yhy : 給樓上F大 所以要均衡攝取各種毒素(?)02/21 22:26
推 umunya : 擦的會比吃的好嗎02/21 23:42
擦的有皮膚屏障阻隔,經皮吸收進入身體的量較少,研究顯示和正常人一樣,但也不排除
有些人對A酸極敏感,有懷孕計劃停用是最安全的。
推 purple0226 : 口服才會存在這麼久吧?02/22 00:39
我沒看到外用的追蹤存在體內多久的研究,不過理論上,口服存在比外用久沒錯。
補充一下,胎兒的生長和A酸有關,A酸的過量和缺乏都可能致畸,維持正常範圍是最好的
。在預定期間內停用A酸,然後平常從食物攝取胡蘿蔔素和A酯,這2樣可在體內轉成A酸,
應該就不用太擔心了。
推 marchi : 好專業,剛好提供給朋友參考,感謝分享 02/22 09:55
※ 編輯: antioxidant (39.12.162.212), 02/22/2017 15:33:47
推 machin : 專業推,好懶得查文獻~哈哈^^" 02/22 19:01