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Neuropeptide SF (mouse, rat)

NPFF1 and NPFF2 agonist CAS# 230960-31-3

Neuropeptide SF (mouse, rat)

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Neuropeptide SF (mouse, rat)

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Chemical Properties of Neuropeptide SF (mouse, rat)

Cas No. 230960-31-3 SDF Download SDF
PubChem ID 90488868 Appearance Powder
Formula C40H65N13O10 M.Wt 888.03
Type of Compound N/A Storage Desiccate at -20°C
Solubility Soluble to 1 mg/ml in 20% acetonitrile / water
Sequence SLAAPQRF

(Modifications: Phe-8 = C-terminal amide)

Chemical Name (2S)-2-[[(2S)-1-[(2S)-2-[[(2S)-2-[[(2S)-2-[[(2S)-2-amino-3-hydroxypropanoyl]amino]-4-methylpentanoyl]amino]propanoyl]amino]propanoyl]pyrrolidine-2-carbonyl]amino]-N-[(2S)-1-[[(2S)-1-amino-1-oxo-3-phenylpropan-2-yl]amino]-5-(diaminomethylideneamino)-1-oxopentan-2-yl]pentanediamide
SMILES CC(C)CC(C(=O)NC(C)C(=O)NC(C)C(=O)N1CCCC1C(=O)NC(CCC(=O)N)C(=O)NC(CCCN=C(N)N)C(=O)NC(CC2=CC=CC=C2)C(=O)N)NC(=O)C(CO)N
Standard InChIKey OLOSAWFREOVGQW-CJKZIAQFSA-N
Standard InChI InChI=1S/C40H65N13O10/c1-21(2)18-29(52-34(58)25(41)20-54)37(61)47-22(3)33(57)48-23(4)39(63)53-17-9-13-30(53)38(62)50-27(14-15-31(42)55)36(60)49-26(12-8-16-46-40(44)45)35(59)51-28(32(43)56)19-24-10-6-5-7-11-24/h5-7,10-11,21-23,25-30,54H,8-9,12-20,41H2,1-4H3,(H2,42,55)(H2,43,56)(H,47,61)(H,48,57)(H,49,60)(H,50,62)(H,51,59)(H,52,58)(H4,44,45,46)/t22-,23-,25-,26-,27-,28-,29-,30-/m0/s1
General tips For obtaining a higher solubility , please warm the tube at 37 ℃ and shake it in the ultrasonic bath for a while.Stock solution can be stored below -20℃ for several months.
We recommend that you prepare and use the solution on the same day. However, if the test schedule requires, the stock solutions can be prepared in advance, and the stock solution must be sealed and stored below -20℃. In general, the stock solution can be kept for several months.
Before use, we recommend that you leave the vial at room temperature for at least an hour before opening it.
About Packaging 1. The packaging of the product may be reversed during transportation, cause the high purity compounds to adhere to the neck or cap of the vial.Take the vail out of its packaging and shake gently until the compounds fall to the bottom of the vial.
2. For liquid products, please centrifuge at 500xg to gather the liquid to the bottom of the vial.
3. Try to avoid loss or contamination during the experiment.
Shipping Condition Packaging according to customer requirements(5mg, 10mg, 20mg and more). Ship via FedEx, DHL, UPS, EMS or other couriers with RT, or blue ice upon request.

Biological Activity of Neuropeptide SF (mouse, rat)

DescriptionNeuropeptide FF receptor agonist (Ki values are 48.4 and 12.1 nM for NPFF1 and NPFF2, respectively). Potentiates the antinociceptive action of morphine in vivo and reverses the loss of morphine potency in tolerant animals. Also increases the amplitude of the sustained current of heterologously expressed acid sensing ion channel 3 (ASIC3) (EC50 ~ 50 μM).

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References on Neuropeptide SF (mouse, rat)

Facilitation of spinal morphine analgesia in normal and morphine tolerant animals by neuropeptide SF and related peptides.[Pubmed:16515821]

Peptides. 2006 May;27(5):953-63.

Neuropeptide FF and related synthetic amidated peptides have been shown to elicit sustained anti-nociceptive responses and potently augment spinal anti-nociceptive actions of spinal morphine in tests of thermal and mechanical nociception. Recent studies have described the occurrence of another octapeptide, neuropeptide SF (NPSF) in the spinal cord and the cerebrospinal fluid and demonstrated its affinity for the NPFF receptors. This study examined the effects of NPSF and two putative precursor peptides, EFW-NPSF and NPAF, on the spinal actions of morphine in normal and opioid tolerant rats using the tailflick and pawpressure tests. In normal rats, NPSF demonstrated weak intrinsic activity but sub-effective doses of the peptide significantly increased the magnitude and duration of spinal morphine anti-nociception in both tests. A low-dose of NPSF also augmented the spinal actions of a delta receptor agonist, deltorphin. The morphine-potentiating effect of NPSF was shared by EFW-NPSF and the octadecapeptide NPAF. In animal rendered tolerant by continuous intrathecal infusion of morphine for 6 days, low dose NPSF itself elicited a significant anti-nociceptive response and potently increased morphine-induced response in both tests. In animals made tolerant by repeated injections of intrathecal morphine, administration of NPSF, EFW-NPSF, and NPAF with morphine reversed the loss of the anti-nociceptive effect and restored the agonist potency. The results demonstrate that in normal animals NPSF and related peptides exert strong potentiating effect on morphine anti-nociception at the spinal level and in tolerant animals these agents can reverse the loss of morphine potency.

Effects of neuropeptide SF and related peptides on acid sensing ion channel 3 and sensory neuron excitability.[Pubmed:12668052]

Neuropharmacology. 2003 Apr;44(5):662-71.

Acid sensing ion channel 3 (ASIC3) is a cation channel gated by extracellular protons. It is highly expressed in sensory neurons, including small nociceptive neurons and has been proposed to participate in pain perception associated with tissue acidosis and in mechanoperception. Neuropeptide FF (NPFF) and FMRFamide have been shown to potentiate proton-gated currents from cultured sensory neurons and acid sensing ion channel (ASIC) cDNA transfected cells. In this study, we report that another mammalian peptide neuropeptide SF (NPSF), derived from the same precursor, also considerably increases the amplitude of the sustained current of heterologously expressed ASIC3 (12-fold vs. 19- and nine-fold for FMRFamide and NPFF, respectively) with an EC(50) of approximately 50 microM. Similar effects were also observed on endogenous ASIC3-like sustained current recorded from DRG neurons although of smaller amplitudes (two-, three- and seven-fold increase for NPSF, NPFF and FMRFamide, respectively), and essentially related to a slowing down of the inactivation rate. Importantly, this modulation induced changes in neuronal excitability in response to an electrical stimulus applied during extracellular acidification. ASIC3-mediated sustained depolarisation, and its regulation by neuropeptides, could thus be important in regulating polymodal neuron excitability particularly under inflammatory conditions where the expression levels of both NPFF precursor and ASIC3 are increased.

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