Medrogestone   中文名称: 美屈孕酮

Absorption, Distribution and Excretion
When administered, medrogestone presents a very rapid gastrointestinal absorption with a bioavailability of 100%. The maximum serum concentration of medrogestone is 10-15 ng/ml.
The elimination time of medrogestone is of 36 hours.

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Metabolism / Metabolites
The non-protein bound fraction of medrogestoneis available for metabolism. The main route in the metabolism of medrogestone is hydroxylation.

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Biological Half-Life
The half-life of medrogestone is reported to be of 4 hours.

Protein Binding
Medrogestone, as presented for all progestogens, is highly bound to plasma proteins. It is mainly bound to albumin but it also binds to other plasma proteins like sex hormone binding globulin or corticosteroid-binding globulin. The pharmacokinetics of medrogestone will depend on the degree of plasma protein bindind which makes this characteristic the main regulator of the tissue availability of medrogestone.

Breast cancer and steroid metabolizing enzymes: the role of progestogens;

Medrogestone is a corticosteroid hormone.
Medrogestone (INN), also known as 6,17α-dimethyl-6-dehydroprogesterone, is a progestational agent derived from 17-methylprogesterone. It was conceived as an alternative for an orally effective contraceptive option. It was developed by Ayerst, approved in Canada in 1969 and its current status is cancelled post-marketing. It was never approved by the FDA.
6,17-Dimethylpregna-4,6-diene-3,20-dione. A synthetic progestational hormone with actions similar to those of progesterone. It is used in the treatment of menstrual irregularities and has also been employed in the treatment of prostatic hypertrophy and endometrial carcinoma.

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Drug Indication
Medrogestone is indicated as adjunct to treat endometial shedding in menopausal women, to treat secondary amenorrhea, to induce menses and to treat dysfunctional uterine bleeding in adult and adolescent women.

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Mechanism of Action
Medrogestone is a progestogen, thus its action is done under the same profile. These type of molecules are steroid hormones that bind and activate the progesterone receptor. Its action may involve the suppression of gonadotropic hormones from the anterior portion of the pituitary gland and secondary suppression of testosterone. Medrogestone presents structural similarities to testosterone which allows it to compete for the androgen-receptor-protein receptor sites in prostatic cells. Administration of medrogestone diminishes the response to endogenous hormones in tumor cells due to a reduction in hormone steroid receptors; this effect will translate into cytotoxic or antiproliferative effects.

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Pharmacodynamics
Medrogestone was created as a more potent and orally active option of progesterone. In pre-clinical trials, medrogestone was proven to have four times more progestational activity than progesterone with a similar duration effect than the one found for 17-hydroxyprogesterone. Medrogestone was also able to maintain pregnancy and prevented ovulation in ovariectomized rats. Administration of medrogestone, alone or with premarin, prevented pregnancy, as well as it suppressed ovarian weight increase by nearly 100% of the tested individuals. Medrogestone does not produce any androgenic effect but it presented a marked anti-androgenic effect. It did not present an oestrogenic effect, nor changes in organ weight or histological appearance in adrenal glands or thymus and it does not present any anti-inflammatory effects.

C23H32O2

340.5

340.24

977-79-7

9949848

Typically exists as solid at room temperature

1.08g/cm3

467.2ºC at 760mmHg

144-146ºC

173.7ºC

1.549

5.279

34.14

0

2

1

25

714

6

O=C1C=C2C(C)=C[C@H]3[C@@H]4CC[C@@](C(C)=O)(C)[C@@]4(C)CC[C@@H]3[C@@]2(C)CC1

HCFSGRMEEXUOSS-JXEXPEPMSA-N

InChI=1S/C23H32O2/c1-14-12-17-18(21(3)9-6-16(25)13-20(14)21)7-11-23(5)19(17)8-10-22(23,4)15(2)24/h12-13,17-19H,6-11H2,1-5H3/t17-,18+,19+,21-,22-,23+/m1/s1

(8R,9S,10R,13S,14S,17S)-17-acetyl-6,10,13,17-tetramethyl-2,8,9,11,12,14,15,16-octahydro-1H-cyclopenta[a]phenanthren-3-one

AY-62022 Medrogesterone Medrogestone

2934.99.9001

Powder      -20°C    3 years

                     4°C     2 years

In solvent   -80°C    6 months

                  -20°C    1 month

Room temperature (This product is stable at ambient temperature for a few days during ordinary shipping and time spent in Customs)

May dissolve in DMSO (in most cases), if not, try other solvents such as H2O, Ethanol, or DMF with a minute amount of products to avoid loss of samples

注意: 如下所列的是一些常用的体内动物实验溶解配方，主要用于溶解难溶或不溶于水的产品（水溶度<1 mg/mL）。 建议您先取少量样品进行尝试，如该配方可行，再根据实验需求增加样品量。

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注射用配方1: DMSO : Tween 80： Saline = 10 : 5 : 85 (如： 100 μL DMSO → 50 μL Tween 80 → 850 μL Saline)
*生理盐水/Saline的制备：将0.9g氯化钠/NaCl溶解在100 mL ddH ₂ O中，得到澄清溶液。
注射用配方 2: DMSO : PEG300 ：Tween 80 : Saline = 10 : 40 : 5 : 45 (如： 100 μL DMSO → 400 μL PEG300 → 50 μL Tween 80 → 450 μL Saline)
注射用配方 3: DMSO : Corn oil = 10 : 90 (如： 100 μL DMSO → 900 μL Corn oil)
示例: 以注射用配方 3 (DMSO : Corn oil = 10 : 90) 为例说明, 如果要配制 1 mL 2.5 mg/mL的工作液, 您可以取 100 μL 25 mg/mL 澄清的 DMSO 储备液，加到 900 μL Corn oil/玉米油中, 混合均匀。

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注射用配方 4: DMSO : 20% SBE-β-CD in Saline = 10 : 90 [如：100 μL DMSO → 900 μL (20% SBE-β-CD in Saline)]
*20% SBE-β-CD in Saline的制备（4°C，储存1周）：将2g SBE-β-CD (磺丁基-β-环糊精) 溶解于10mL生理盐水中，得到澄清溶液。
注射用配方 5: 2-Hydroxypropyl-β-cyclodextrin : Saline = 50 : 50 (如： 500 μL 2-Hydroxypropyl-β-cyclodextrin (羟丙基环胡精)→ 500 μL Saline)
注射用配方 6: DMSO : PEG300 : Castor oil : Saline = 5 : 10 : 20 : 65 (如： 50 μL DMSO → 100 μL PEG300 → 200 μL Castor oil → 650 μL Saline)
注射用配方 7: Ethanol : Cremophor : Saline = 10： 10 : 80 (如： 100 μL Ethanol → 100 μL Cremophor → 800 μL Saline)
注射用配方 8: 溶解于Cremophor/Ethanol (50 : 50), 然后用生理盐水稀释。
注射用配方 9: EtOH : Corn oil = 10 : 90 (如： 100 μL EtOH → 900 μL Corn oil)
注射用配方 10: EtOH : PEG300：Tween 80 : Saline = 10 : 40 : 5 : 45 (如： 100 μL EtOH → 400 μL PEG300 → 50 μL Tween 80 → 450 μL Saline)

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口服配方 1: 悬浮于0.5% CMC Na (羧甲基纤维素钠)
口服配方 2: 悬浮于0.5% Carboxymethyl cellulose (羧甲基纤维素)
示例: 以口服配方 1 (悬浮于 0.5% CMC Na)为例说明, 如果要配制 100 mL 2.5 mg/mL 的工作液, 您可以先取0.5g CMC Na并将其溶解于100mL ddH2O中，得到0.5%CMC-Na澄清溶液；然后将250 mg待测化合物加到100 mL前述 0.5%CMC Na溶液中，得到悬浮液。

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口服配方 3: 溶解于 PEG400 (聚乙二醇400)
口服配方 4: 悬浮于0.2% Carboxymethyl cellulose (羧甲基纤维素)
口服配方 5: 溶解于0.25% Tween 80 and 0.5% Carboxymethyl cellulose (羧甲基纤维素)
口服配方 6: 做成粉末与食物混合

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注意: 以上为较为常见方法，仅供参考， InvivoChem并未独立验证这些配方的准确性。具体溶剂的选择首先应参照文献已报道溶解方法、配方或剂型，对于某些尚未有文献报道溶解方法的化合物，需通过前期实验来确定（建议先取少量样品进行尝试），包括产品的溶解情况、梯度设置、动物的耐受性等。

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请根据您的实验动物和给药方式选择适当的溶解配方/方案：
1、请先配制澄清的储备液(如：用DMSO配置50 或 100 mg/mL母液(储备液));
2、取适量母液，按从左到右的顺序依次添加助溶剂，澄清后再加入下一助溶剂。以 下列配方为例说明 (注意此配方只用于说明，并不一定代表此产品 的实际溶解配方):
10% DMSO → 40% PEG300 → 5% Tween-80 → 45% ddH2O (或 saline);
假设最终工作液的体积为 1 mL, 浓度为5 mg/mL: 取 100 μL 50 mg/mL 的澄清 DMSO 储备液加到 400 μL PEG300 中，混合均匀/澄清；向上述体系中加入50 μL Tween-80，混合均匀/澄清；然后继续加入450 μL ddH2O (或 saline)定容至 1 mL；
3、溶剂前显示的百分比是指该溶剂在最终溶液/工作液中的体积所占比例;
4、 如产品在配制过程中出现沉淀/析出，可通过加热(≤50℃)或超声的方式助溶;
5、为保证最佳实验结果，工作液请现配现用！
6、如不确定怎么将母液配置成体内动物实验的工作液，请查看说明书或联系我们;
7、 以上所有助溶剂都可在 Invivochem.cn网站购买。