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Win 18446

Cat No.:V73916 Purity: ≥98%
Win 18446 is an orally bioactive inhibitor of the testis-specific enzyme ALDH1a2 with IC50 of 0.3 μM.
Win 18446
Win 18446 Chemical Structure CAS No.: 1477-57-2
Product category: ALDH
This product is for research use only, not for human use. We do not sell to patients.
Size Price Stock Qty
50mg
Other Sizes
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Product Description
Win 18446 is an orally bioactive inhibitor of the testis-specific enzyme ALDH1a2 with IC50 of 0.3 μM. Win 18446 reversibly inhibits spermatogenesis in multiple species and inhibits the synthesis of retinoic acid from retinol in the testes.
Biological Activity I Assay Protocols (From Reference)
Targets
ALDH1
ln Vitro
Stra8 expression in entire testis cultures containing germ cells and somatic cells is inhibited by WIN 18446 (1 μM, 24 hours) [2].
ln Vivo
Win 18446 (200 mg/kg, taken orally for 4, 8, and 16 weeks) causes severe impairments to spermatogenesis, a major decrease in intratesticular retinoic acid concentration, and ultimately sterility[1].
Cell Assay
RT-PCR[2]
Cell Types: Testes were collected from 2-dpp mice.
Tested Concentrations: 1 μM.
Incubation Duration: 24 h.
Experimental Results: Results in a VAD-like phenotype in the testis. Alone or in combination with ROL Dramatically diminished Stra8 expression.
Animal Protocol
Animal/Disease Models: Six-month-old male New Zealand white rabbits[1].
Doses: 200 mg/kg.
Route of Administration: Orally for 4, 8, and 16 weeks.
Experimental Results: Resulted in marked suppression of testicular weight over time. Dramatically suppressed spermatogenesis. Dramatically reduces intratesticular concentrations of retinoic acid and Stra8 expression and very severely suppresses spermatogenesis and fertility.
References

[1]. Suppression of spermatogenesis by bisdichloroacetyldiamines is mediated by inhibition of testicular retinoic acid biosynthesis. J Androl. Jan-Feb 2011;32(1):111-9.

[2]. Suppression of Stra8 expression in the mouse gonad by WIN 18,446. Biol Reprod. 2011 May;84(5):957-65.

Additional Infomation
WIN 18446 is a carboxamide that is 1,8-diaminooctane in which a hydrogen attached to each of the amino groups has been replaced by a dichloroacetyl group. Inhibitor of aldehyde dehydrogenase 1a2 (ALDH1a2). Inhibits the biosynthesis of retinoic acid from retinol in neonatal and adult murine testis. It down-regulates sex related genes in zebrafish. It has a role as an EC 1.2.1.3 [aldehyde dehydrogenase (NAD(+))] inhibitor. It is an organochlorine compound and a secondary carboxamide. It is functionally related to a dichloroacetic acid and a 1,8-diaminooctane.
These protocols are for reference only. InvivoChem does not independently validate these methods.
Physicochemical Properties
Molecular Formula
C12H20CL4N2O2
Molecular Weight
366.11
Exact Mass
364.027
CAS #
1477-57-2
PubChem CID
15134
Appearance
Solid powder
Density
1.3±0.1 g/cm3
Boiling Point
530.2±50.0 °C at 760 mmHg
Melting Point
118-120ºC
Flash Point
274.5±30.1 °C
Vapour Pressure
0.0±1.4 mmHg at 25°C
Index of Refraction
1.503
LogP
1.96
Hydrogen Bond Donor Count
2
Hydrogen Bond Acceptor Count
2
Rotatable Bond Count
11
Heavy Atom Count
20
Complexity
261
Defined Atom Stereocenter Count
0
InChi Key
FAOMZVDZARKPFJ-UHFFFAOYSA-N
InChi Code
InChI=1S/C12H20Cl4N2O2/c13-9(14)11(19)17-7-5-3-1-2-4-6-8-18-12(20)10(15)16/h9-10H,1-8H2,(H,17,19)(H,18,20)
Chemical Name
2,2-dichloro-N-[8-[(2,2-dichloroacetyl)amino]octyl]acetamide
HS Tariff Code
2934.99.9001
Storage

Powder      -20°C    3 years

                     4°C     2 years

In solvent   -80°C    6 months

                  -20°C    1 month

Note: Please store this product in a sealed and protected environment (e.g. under nitrogen), avoid exposure to moisture.
Shipping Condition
Room temperature (This product is stable at ambient temperature for a few days during ordinary shipping and time spent in Customs)
Solubility Data
Solubility (In Vitro)
DMSO: 100 mg/mL (273.14 mM)
Solubility (In Vivo)
Solubility in Formulation 1: ≥ 2.08 mg/mL (5.68 mM) (saturation unknown) in 10% DMSO + 40% PEG300 +5% Tween-80 + 45% Saline (add these co-solvents sequentially from left to right, and one by one), clear solution.
For example, if 1 mL of working solution is to be prepared, you can add 100 μL of 20.8 mg/mL clear DMSO stock solution to 400 μL PEG300 and mix evenly; then add 50 μL Tween-80 + to the above solution and mix evenly; then add 450 μL normal saline to adjust the volume to 1 mL.
Preparation of saline: Dissolve 0.9 g of sodium chloride in 100 mL ddH₂ O to obtain a clear solution.

 (Please use freshly prepared in vivo formulations for optimal results.)
Preparing Stock Solutions 1 mg 5 mg 10 mg
1 mM 2.7314 mL 13.6571 mL 27.3142 mL
5 mM 0.5463 mL 2.7314 mL 5.4628 mL
10 mM 0.2731 mL 1.3657 mL 2.7314 mL

*Note: Please select an appropriate solvent for the preparation of stock solution based on your experiment needs. For most products, DMSO can be used for preparing stock solutions (e.g. 5 mM, 10 mM, or 20 mM concentration); some products with high aqueous solubility may be dissolved in water directly. Solubility information is available at the above Solubility Data section. Once the stock solution is prepared, aliquot it to routine usage volumes and store at -20°C or -80°C. Avoid repeated freeze and thaw cycles.

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Note: Chemical formula is case sensitive: C12H18N3O4  c12h18n3o4
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Step 1: Enter information below (Recommended: An additional animal to make allowance for loss during the experiment)
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Working concentration mg/mL;

Method for preparing DMSO stock solution mg drug pre-dissolved in μL DMSO (stock solution concentration mg/mL). Please contact us first if the concentration exceeds the DMSO solubility of the batch of drug.

Method for preparing in vivo formulation:Take μL DMSO stock solution, next add μL PEG300, mix and clarify, next addμL Tween 80, mix and clarify, next add μL ddH2O,mix and clarify.

(1) Please be sure that the solution is clear before the addition of next solvent. Dissolution methods like vortex, ultrasound or warming and heat may be used to aid dissolving.
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