-
外観
白色〜わずかにうすい褐色, 結晶性粉末〜粉末
-
溶解性
エタノール(1g/約150ml), クロロホルム(1g/200ml)に溶ける。エタノール, クロロホルム, ジオキサンに難溶、水に不溶。エタノール(95)に溶けにくく、水に極めて溶けにくい。
-
解説
プレドニソン,白色の結晶．分解点226～232 ℃．[α]D25"＋186°(ジオキサン)．λmax 238 nm(ε 16100)．水に難溶，エタノール，クロロホルムに可溶．副じん皮質ホルモン作用のうち，糖質コルチコイド作用が強く抗アレルギー作用，抗炎症作用を呈する．リウマチ性疾患，皮膚疾患，ぜん息などの治療薬に用いられる．
森北出版「化学辞典（第2版）
-
用途
薬理研究用。
-
製造
プレドニソン,合成コルチコステロイドの一つ．コルチゾンの微生物による脱水素反応，またはプレグナン-17α,21-ジオール-3,11,20-トリオンのブロム化，脱臭化水素で合成される．
-
効能
抗炎症薬, グルココルチコイド受容体作動薬
-
化学的特性
White or almost white, crystalline powder.
-
使用
Prednisone is used for the same indications as cortisone for inflammatory processes,
allergies, and adrenal gland insufficiency; however, it is somewhat more active than cortisone
and has less of an effect on mineral volume.
-
定義
ChEBI: A synthetic glucocorticoid drug that is particularly effective as an immunosuppressant, and affects virtually all of the immune system. Prednisone is a prodrug that is converted by the liver into prednisolone (a beta-hydroxy group instead
f the oxo group at position 11), which is the active drug and also a steroid.
-
適応症
Prednisone 2.5 to 7.5 mg, administered at night or dexamethasone 0.25
to 0.75 mg are useful in female patients, with severe acne unresponsive
to conventional therapy, who suffer from adrenal gland overproduction
of androgens such as congenital adrenal hyperplasia.
-
一般的な説明
Prednisone, Δ1-cortisone, 17,21-dihydroxypregna-1,4-diene-3,11,20-trione, has systemic activityvery similar to that of prednisolone, and because of itslower salt-retention activity, it is often preferred over cortisoneor hydrocortisone. Prednisone must be reduced in vivoto prednisolone to provide the active GC.
-
空気と水の反応
Very slightly water soluble .
-
危険性
Questionable carcinogen.
-
安全性プロファイル
Poison by
intraperitoneal and subcutaneous routes.
Moderately toxic by intramuscular route.
Human systemic effects: sensory change
involving peripheral nerves, dermatitis.
Experimental reproductive effects.
Questionable carcinogen with experimental
tumorigenic data. Mutation data reported.
Has been implicated in aplastic anemia.
-
純化方法
Crystallise prednisone from acetone/hexane, then recrystallise it from Me2CO. The monoacetate crystallises from Me2CO/hexane with m 227-233o(dec), [] D +186o (c 1, dioxane), and the diacetate crystallises from 25Me2CO/hexane with m 219-221o(dec), [] D +125o (c 1, CHCl3). [Hertzog et al. Tetrahedron 18 581 1962, Beilstein 8 IV 3531.]
