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E7131

Sigma-Aldrich

[D-Ala2, D-Leu5]-Enkephalin acetate salt

≥95% (HPLC)

Synonym(s):

DADLE

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About This Item

Empirical Formula (Hill Notation):
C29H39N5O7
CAS Number:
94825-57-7
Molecular Weight:
569.65
MDL number:
MFCD00133947
UNSPSC Code:
12352209
PubChem Substance ID:
329799004
NACRES:
NA.32

Quality Level

200

Assay

≥95% (HPLC)

storage temp.

−20°C

SMILES string

CC(O)=O.CC(C)C[C@@H](NC(=O)[C@H](Cc1ccccc1)NC(=O)CNC(=O)[C@@H](C)NC(=O)[C@@H](N)Cc2ccc(O)cc2)C(O)=O

InChI

1S/C29H39N5O7.C2H4O2/c1-17(2)13-24(29(40)41)34-28(39)23(15-19-7-5-4-6-8-19)33-25(36)16-31-26(37)18(3)32-27(38)22(30)14-20-9-11-21(35)12-10-20;1-2(3)4/h4-12,17-18,22-24,35H,13-16,30H2,1-3H3,(H,31,37)(H,32,38)(H,33,36)(H,34,39)(H,40,41);1H3,(H,3,4)/t18-,22+,23+,24-;/m1./s1

InChI key

YRZBXSPTRALQEX-IIKZURRYSA-N

Gene Information

human ... OPRD1(4985)
mouse ... OPRD1(18386)
rat ... OPRD1(24613)

Amino Acid Sequence

Tyr-Ala-Gly-Phe-Leu

General description

[D-Ala2, D-Leu5]-Enkephalin acetate salt, also called DADLE, is an analog of endogenous δ-opioid peptide encephalin, and is metabolically stable.

Application

[D-Ala2, D-Leu5]-Enkephalin or DADLE has been used for use in immunocomplex kinetic assay, to determine the activation of p70s6k by DADLE in the cell clones D2 and DOE and in non-transfected parental Rat-1 fibroblasts and to assess the analgesic effect of WIN55,212-2 in mice.

Biochem/physiol Actions

Prototypical δ-agonist; more potent and selective than Leu-enkephalin and Met-enkephalin.
[D-Ala2, D-Leu5]-Enkephalin can induce hibernation in ground squirrels, during summers, when they do not normally hibernate. In multiorgan block preparation, it can prolong the survival time of organs such as, heart, lung, liver, spleen and kidney, up to 46hrs. It aids in tolerance development of myocardium to ischemia. It might have tissue protective role in central nervous system. It prevents and reverses methamphetamine (METH)-induced damage of dopaminergic terminals of brain. It prevents naltrexone-sensitive PC12 cell apoptosis in serum deprivation conditions. Thus, it might play an essential role in the survival of neurons and organs.

Storage Class Code

11 - Combustible Solids

WGK

WGK 3

Flash Point(F)

Not applicable

Flash Point(C)

Not applicable

Personal Protective Equipment

dust mask type N95 (US), Eyeshields, Gloves

Certificates of Analysis (COA)

Search for Certificates of Analysis (COA) by entering the products Lot/Batch Number. Lot and Batch Numbers can be found on a product’s label following the words ‘Lot’ or ‘Batch’.

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T P Su
Journal of biomedical science, 7(3), 195-199 (2000-05-16)
By studying the hibernation in ground squirrels, a protein factor termed hibernation induction trigger (HIT) was found to induce hibernation in summer-active ground squirrels. Further purification of HIT yielded an 88-kD peptide that is enriched in winter hibernator. Partial sequence
Danyun Fu et al.
Mediators of inflammation, 2021, 6661620-6661620 (2021-02-26)
Cerebral ischemia-reperfusion (I/R) injury is the main cause of acute brain injury, which is a life-threatening disease due to the lack of effective treatments. [D-Ala2, D-Leu5] enkephalin (DADLE) is a synthetic delta-opioid receptor agonist that is reported to confer neuroprotective
Yi Zhou et al.
Molecular medicine reports, 16(5), 6214-6221 (2017-09-14)
Hepatic ischemia/reperfusion (I/R) injury is a common pathophysiological process that occurs following liver surgery, which is associated with oxidative stress, and can cause acute liver injury and lead to liver failure. Recently, the development of drugs for the prevention of
M A Wilson et al.
The Biochemical journal, 325 ( Pt 1), 217-222 (1997-07-01)
The regulation of mitogenic signalling pathways by G-protein-coupled receptors has been studied in Rat-1 fibroblasts stably transfected with the murine delta opioid receptor. We showed recently that stimulation of this receptor led to the activation of the p42 and p44
L I Tsao et al.
The Journal of pharmacology and experimental therapeutics, 287(1), 322-331 (1998-10-09)
Delta opioid peptide [D-Ala2,D-leu5]enkephalin (DADLE) can prolong organ preservation and increases myocardial tolerance to ischemia. Our study examined the protective property of DADLE against methamphetamine- (METH) induced dopaminergic terminal damage in the central nervous system. Because the neurotoxicity of METH
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