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Tyroserleutide (YSL), isolated from the degradation products of porcine spleen, is a small molecular tripeptide which inhibits tumor growth both in vitro and in vivo.

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Tyroserleutide Chemical Structure

Tyroserleutide Chemical Structure

CAS No. : 138168-48-6

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Description

Tyroserleutide (YSL), isolated from the degradation products of porcine spleen[1], is a small molecular tripeptide which inhibits tumor growth both in vitro and in vivo[2].

IC50 & Target

Antitumor tripeptide[1][2]

In Vitro

Tyroserleutide (YSL) exhibits immuno-modulating effects, such as enhancing concanavalin (ConA) induced proliferation of mouse spleen lymphocytes, phagocytosis of mouse peritoneal macrophages, and the activity of natural killer (NK) cells[1].
Tyroserleutide (YSL), an immunologically therapeutic tripeptide, can promote hepatocarcinoma cell (H22) apoptosis through downregulating Bcl-2 and cyclin D1 expression[2].
Tyroserleutide is an ideal choice for inducing apoptosis of liver tumor cells[2].
Tyroserleutide inhibits tumor growth and does not cause severe toxicities in the major organs. Tyroserleutide can inhibit tumor cell migration[2].

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

In Vivo

Tyroserleutide (10-80 μg/kg; injection (i.p.) one time every day until mice are dead) displays obvious anti-tumor activity. Tyroserleutide significantly prolongs the survival time of the murine H22 implanted mice[1].

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

Animal Model: Female Kun-Ming mice (18-22 g, 6 week old) with H22 tumor model[1]
Dosage: 10, 20, 40, and 80 μg/kg
Administration: Injection (i.p.) one time every day until mice were dead.
Result: Survival times are 25.53±14.14, 25.82±14.29, 30.47±17.89, 35.06±20.90 days for 10, 20, 40, and 80 μg/kg, respectively.
Clinical Trial
Molecular Weight

381.42

Formula

C18H27N3O6

CAS No.
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Storage

Please store the product under the recommended conditions in the Certificate of Analysis.

Solvent & Solubility
In Vitro: 

H2O

Peptide Solubility and Storage Guidelines:

1.  Calculate the length of the peptide.

2.  Calculate the overall charge of the entire peptide according to the following table:

  Contents Assign value
Acidic amino acid Asp (D), Glu (E), and the C-terminal -COOH. -1
Basic amino acid Arg (R), Lys (K), His (H), and the N-terminal -NH2 +1
Neutral amino acid Gly (G), Ala (A), Leu (L), Ile (I), Val (V), Cys (C), Met (M), Thr (T), Ser (S), Phe (F), Tyr (Y), Trp (W), Pro (P), Asn (N), Gln (Q) 0

3.  Recommended solution:

Overall charge of peptide Details
Negative (<0) 1.  Try to dissolve the peptide in water first.
2.  If water fails, add NH4OH (<50 μL).
3.  If the peptide still does not dissolve, add DMSO (50-100 μL) to solubilize the peptide.
Positive (>0) 1.  Try to dissolve the peptide in water first.
2.  If water fails, try dissolving the peptide in a 10%-30% acetic acid solution.
3.  If the peptide still does not dissolve, try dissolving the peptide in a small amount of DMSO.
Zero (=0) 1.  Try to dissolve the peptide in organic solvent (acetonitrile, methanol, etc.) first.
2.  For very hydrophobic peptides, try dissolving the peptide in a small amount of DMSO, and then dilute the solution with water to the desired concentration.
Purity & Documentation
References
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Help & FAQs
  • Do most proteins show cross-species activity?

    Species cross-reactivity must be investigated individually for each product. Many human cytokines will produce a nice response in mouse cell lines, and many mouse proteins will show activity on human cells. Other proteins may have a lower specific activity when used in the opposite species.

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Product Name:
Tyroserleutide
Cat. No.:
HY-106263
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