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  3. L-Thyroxine sodium salt pentahydrate

L-Thyroxine sodium salt pentahydrate (Synonyms: Sodium levothyroxine pentahydrate)

Cat. No.: HY-18341A Purity: 99.38%
Handling Instructions

L-Thyroxine sodium salt pentahydrate (Levothyroxine; T4) is a synthetic hormone for the research of hypothyroidism. DIO enzymes convert biologically active thyroid hormone (Triiodothyronine,T3) from L-Thyroxine (T4).

For research use only. We do not sell to patients.

L-Thyroxine sodium salt pentahydrate Chemical Structure

L-Thyroxine sodium salt pentahydrate Chemical Structure

CAS No. : 6106-07-6

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10 mM * 1 mL in DMSO USD 66 In-stock
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1 g USD 78 In-stock
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Description

L-Thyroxine sodium salt pentahydrate (Levothyroxine; T4) is a synthetic hormone for the research of hypothyroidism. DIO enzymes convert biologically active thyroid hormone (Triiodothyronine,T3) from L-Thyroxine (T4)[1].

IC50 & Target

Thyroid Hormone Receptor

In Vivo

Deiodinases (DIOs), which catalyse the conversion of thyroxine (pro-hormone) to the active thyroid hormone, are associated with thyroid stimulating hormone (TSH) levels. DIO1 and DIO2 catalyze activation of thyroid hormone secretion in contrast to DIO3 playing role inactivation of the secretion. Activities of DIO1 and DIO2 play pivotal role in the negative feedback regulation of pituitary TSH secretion[1]. L-Thyroxine (T4) and Triiodothyronine (T3) hormones are known to modulate the expression of ionic channels, pumps and regulatory contractile proteins. Moreover, thyroid hormones have been shown to influence calcium homeostasis and flux responsible for excitation and contractility, with L-Thyroxine and Triiodothyronine modulating its pharmacological control and secretion. In rats fed 12 weeks with the iodine-free diet, a significant decrease in the levels of both Triiodothyronine and L-Thyroxine is observed when compared to the control group fed with standard diet (p<0.001). In the group treated with low doses of L-Thyroxine, an increase in L-Thyroxine levels is observed (p=0.02) while Triiodothyronine levels remain virtually similar to the control group (p=0.19). Rats treated with high doses of L-Thyroxine display a significant increase in both Triiodothyronine and L-Thyroxine circulating concentrations compared to the non-treated hypothyroid group (p<0.001 and p=0.004, respectively) and a significant increase in L-Thyroxine levels when compared to the control values (p=0.03)[2].

MCE has not independently confirmed the accuracy of these methods. They are for reference only.

Clinical Trial
Molecular Weight

888.93

Formula

C₁₅H₂₀I₄NNaO₉

CAS No.

6106-07-6

SMILES

N[[email protected]@H](CC1=CC(I)=C(C(I)=C1)OC2=CC(I)=C(O)C(I)=C2)C(O[Na])=O.O.O.O.O.O

Shipping

Room temperature in continental US; may vary elsewhere.

Storage
Powder -20°C 3 years
4°C 2 years
In solvent -80°C 6 months
-20°C 1 month
Solvent & Solubility
In Vitro: 

DMSO : ≥ 28 mg/mL (31.50 mM)

H2O : < 0.1 mg/mL (insoluble)

*"≥" means soluble, but saturation unknown.

Preparing
Stock Solutions
Concentration Solvent Mass 1 mg 5 mg 10 mg
1 mM 1.1249 mL 5.6247 mL 11.2495 mL
5 mM 0.2250 mL 1.1249 mL 2.2499 mL
10 mM 0.1125 mL 0.5625 mL 1.1249 mL
*Please refer to the solubility information to select the appropriate solvent.
In Vivo:
  • 1.

    Add each solvent one by one:  10% DMSO    40% PEG300    5% Tween-80    45% saline

    Solubility: ≥ 2.5 mg/mL (2.81 mM); Clear solution

  • 2.

    Add each solvent one by one:  10% DMSO    90% (20% SBE-β-CD in saline)

    Solubility: 2.5 mg/mL (2.81 mM); Suspended solution; Need ultrasonic

*All of the co-solvents are provided by MCE.
References
Animal Administration
[2]

Rats[2]
Sprague-Dawley female rats (N=22) are used. Non-pregnant rats are divided into four groups: 1) control, 2) hypothyroidism, 3) hypothyroidism treated with low doses of L-Thyroxine (20 μg/kg/day) and 4) with high doses of L-Thyroxine (100 μg/kg/day). Control rats (group 1) are fed with standard diet, while the intervention rats are fed with iodine-free diet for 12 weeks to induce hypothyroidism (groups 2-4) which is continued for four more weeks to allow screening of hypothyroid status and L-Thyroxine-treatment. Food and water (iodine-free diet) are available ad libitum. The hypothyroid group treated with low (group 3) or high doses of L-Thyroxine (group 4) are injected intraperitoneally every 24 h with respectively 20 μg/kg/day and 100 μg/kg/day. Blood samples are collected for thyroid function screening at week 12 and 16 following the initiation of either the control or iodine-free diet. Hysterectomy is performed under general anesthesia (isoflurane 2%) at the end of the treatment and the two uterine horns are placed in physiological Krebs' solution until isometric tension measurements within no more than 1 h.

MCE has not independently confirmed the accuracy of these methods. They are for reference only.

References

Purity: 99.38%

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Keywords:

L-Thyroxine sodium saltSodium levothyroxineThyroid Hormone ReceptorTHRInhibitorinhibitorinhibit

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Product Name:
L-Thyroxine sodium salt pentahydrate
Cat. No.:
HY-18341A
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