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VIP (guinea pig)

Involved in neurotransmission and smooth muscle relaxation CAS# 96886-24-7

VIP (guinea pig)

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Chemical Properties of VIP (guinea pig)

Cas No. 96886-24-7 SDF Download SDF
PubChem ID 90477828 Appearance Powder
Formula C147H239N43O42S2 M.Wt 3344.9
Type of Compound N/A Storage Desiccate at -20°C
Synonyms Vasoactive Intestinal Peptide (guinea pig)
Solubility Soluble to 1 mg/ml in water
Sequence HSDALFTDTYTRLRKQMAMKKYLNSVLN

(Modifications: Asn-28 = C-terminal amide)

SMILES CC(C)CC(C(=O)NC(CC1=CC=CC=C1)C(=O)NC(C(C)O)C(=O)NC(CC(=O)O)C(=O)NC(C(C)O)C(=O)NC(CC2=CC=C(C=C2)O)C(=O)NC(C(C)O)C(=O)NC(CCCNC(=N)N)C(=O)NC(CC(C)C)C(=O)NC(CCCNC(=N)N)C(=O)NC(CCCCN)C(=O)NC(CCC(=O)N)C(=O)NC(CCSC)C(=O)NC(C)C(=O)NC(CCSC)C(=O)NC(CCCCN)C(=O)NC(CCCCN)C(=O)NC(CC3=CC=C(C=C3)O)C(=O)NC(CC(C)C)C(=O)NC(CC(=O)N)C(=O)NC(CO)C(=O)NC(C(C)C)C(=O)NC(CC(C)C)C(=O)NC(CC(=O)N)C(=O)N)NC(=O)C(C)NC(=O)C(CC(=O)O)NC(=O)C(CO)NC(=O)C(CC4=CNC=N4)N
Standard InChIKey UGKBLTCXYMBLJU-SDELKSRWSA-N
Standard InChI InChI=1S/C147H239N43O42S2/c1-71(2)55-97(175-120(207)77(12)165-130(217)105(65-112(201)202)181-140(227)107(68-191)185-121(208)87(151)62-84-67-160-70-163-84)133(220)179-102(59-81-29-19-18-20-30-81)137(224)189-117(80(15)195)145(232)184-106(66-113(203)204)139(226)190-116(79(14)194)144(231)183-103(61-83-38-42-86(197)43-39-83)138(225)188-115(78(13)193)143(230)173-92(35-28-52-162-147(158)159)127(214)176-98(56-72(3)4)131(218)170-91(34-27-51-161-146(156)157)125(212)167-89(32-22-25-49-149)124(211)171-93(44-45-109(152)198)128(215)172-94(46-53-233-16)122(209)164-76(11)119(206)166-95(47-54-234-17)129(216)169-88(31-21-24-48-148)123(210)168-90(33-23-26-50-150)126(213)178-101(60-82-36-40-85(196)41-37-82)135(222)177-99(57-73(5)6)134(221)180-104(64-111(154)200)136(223)186-108(69-192)141(228)187-114(75(9)10)142(229)182-100(58-74(7)8)132(219)174-96(118(155)205)63-110(153)199/h18-20,29-30,36-43,67,70-80,87-108,114-117,191-197H,21-28,31-35,44-66,68-69,148-151H2,1-17H3,(H2,152,198)(H2,153,199)(H2,154,200)(H2,155,205)(H,160,163)(H,164,209)(H,165,217)(H,166,206)(H,167,212)(H,168,210)(H,169,216)(H,170,218)(H,171,211)(H,172,215)(H,173,230)(H,174,219)(H,175,207)(H,176,214)(H,177,222)(H,178,213)(H,179,220)(H,180,221)(H,181,227)(H,182,229)(H,183,231)(H,184,232)(H,185,208)(H,186,223)(H,187,228)(H,188,225)(H,189,224)(H,190,226)(H,201,202)(H,203,204)(H4,156,157,161)(H4,158,159,162)/t76-,77-,78+,79+,80+,87-,88-,89-,90-,91-,92-,93-,94-,95-,96-,97-,98-,99-,100-,101-,102-,103-,104-,105-,106-,107-,108-,114-,115-,116-,117-/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 VIP (guinea pig)

DescriptionNeuropeptide with many biological actions; plays a role in neurotransmission, smooth muscle relaxation and has trophic and mitogenic actions.

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References on VIP (guinea pig)

Restoration by VIP of the carbachol-stimulated Cl- secretion in TTX-treated guinea pig distal colon.[Pubmed:16324225]

Jpn J Physiol. 2005 Dec;55(6):317-24.

To determine if vasoactive intestinal peptide (VIP) restores neural activity from tetrodotoxin (TTX) blockade, we studied the effects of VIP and related agents on carbachol (Cch)-induced Cl(-) secretion in control-isolated guinea pig distal colon and in that treated with TTX. The short circuit current (I(sc)) increased dose-dependently after serosal applications of Cch (10(-6) - 2 x 10(-5) M) and VIP (5 x 10(-9) - 10(-7) M). But no additive or synergistic increase in I(sc) was observed. Cch- and VIP-induced I(sc) was completely abolished by a serosal application of TTX (10(-6) M). However, a serosal application, not mucosal, of VIP (10(-7) M) and 8-bromo-cAMP (10(-3) M) restored the Cch-stimulated, TTX-inhibited I(sc) by 113% and 75.8%, respectively. Furthermore, mucosal and serosal applications of forskolin (aden late cyclase activator) restored the I(sc) by 43.9% and 65.3%, respectively. The restored I(sc) was completely abolished by atropine (muscarinic receptor antagonist). These results suggest that VIP may restore the cholinergic activity by increasing the level of intracellular cAMP, and that cholinergic neuron is very likely to be responsible for the regulation of Cl(-) secretion at neuroepithelial junctions. The exact mechanism of VIP's effect on the TTX-inhibited epithelial Cl(-) secretion, and its possible usefulness in the treatment of TTX-induced pathophysiological conditions, remain to be determined.

Receptors for VIP and PACAP in guinea pig cerebral cortex: effects on cyclic AMP synthesis and characterization by 125I-VIP binding.[Pubmed:15800375]

J Mol Neurosci. 2005;25(3):215-24.

Receptors for vasoactive intestinal peptide (VIP) and pituitary adenylate cyclase-activating polypeptide (PACAP) in guinea pig cerebral cortex were characterized by (1) radioreceptor binding of 125I-labeled VIP (human/rat/porcine), and (2) cyclic AMP (cAMP) formation. Saturation analysis of 125I-VIP binding to membranes of guinea pig cerebral cortex resulted in a linear Scatchard plot, suggesting the presence of a single class of high-affinity receptor-binding sites, with a Kd of 0.63 nM and a B(max) of 77 fmol/mg protein. Various peptides from the PACAP/VIP/secretin family displaced the specific binding of 125I-VIP to guinea pig cerebrum with the relative rank order of potency: chicken VIP (cVIP) > or = PACAP38 approximately PACAP27 approximately guinea pig VIP (gpVIP) > or = mammalian (human/rat/porcine) VIP (mVIP) > peptide histidine-methionine (PHM) > peptide histidine-isoleucine (PHI) > secretin. Analysis of the competition curves revealed displacement of 125I-VIP from high- and lower-affinity binding sites, with IC50 values in the picomolar and the nanomolar range, respectively. About 70% of the specific 125I-VIP-binding sites in guinea pig cerebral cortex were sensitive to Gpp(NH)p, a nonhydrolyzable analog of GTP. Pituitary adenylate cyclase-activating polypeptide 38 (PACAP38), PACAP27, cVIP, gpVIP, mVIP, PHM, and PHI stimulated cAMP production in [3H]adenine-prelabeled slices of guinea pig cerebral cortex in a concentration-dependent manner. Of the tested peptides, the most effective were PACAP38 and PACAP27, which at a 1 microM concentration produced a 17- to 19-fold rise in cAMP synthesis, increasing the nucleotide production to approx 11% conversion above the control value. The three forms of VIP (cVIP, mVIP, and gpVIP) at the highest concentration used, i.e., 3 microM, produced net increases in cAMP production in the range of 8-9% conversion, whereas 5 microM PHM and PHI, by, respectively, 6.7% and 4.9% conversion. It is concluded that cerebral cortex of guinea pig contains VPAC- type receptors positively linked to cAMP formation. In addition, the observed stronger action of PACAP (both PACAP38 and PACAP27), when compared to any form of VIP, on cAMP production in this tissue, suggests its interaction with both PAC1 and VPAC receptors.

mGluR(1) Receptors Contribute to Non-Purinergic Slow Excitatory Transmission to Submucosal VIP Neurons of Guinea-Pig Ileum.[Pubmed:20582273]

Front Neurosci. 2009 May 29;3:46.

Vasoactive intestinal peptide (VIP) immunoreactive secretomotor neurons in the submucous plexus are involved in mediating bacterial toxin-induced hypersecretion leading to diarrhoea. VIP neurons become hyperexcitable after the mucosa is exposed to cholera toxin, which suggests that the manipulation of the excitability of these neurons may be therapeutic. This study used standard intracellular recording methods to systematically characterize slow excitatory postsynaptic potentials (EPSPs) evoked in submucosal VIP neurons by different stimulus regimes (1, 3 and 15 pulse 30 Hz stimulation), together with their associated input resistances and pharmacology. All slow EPSPs were associated with a significant increase in input resistance compared to baseline values. Slow EPSPs evoked by a single stimulus were confirmed to be purinergic, however, slow EPSPs evoked by 15 pulse trains were non-purinergic and those evoked by 3 pulse trains were mixed. NK(1) or NK(3) receptor antagonists did not affect slow EPSPs. The group I mGluR receptor antagonist, PHCCC reduced the amplitude of purinergic and non-purinergic slow EPSPs. Blocking mGluR(1) receptors depressed the overall response to 3 and 15 pulse trains, but this effect was inconsistent, while blockade of mGluR(5) receptors had no effect on the non-purinergic slow EPSPs. Thus, although other receptors are almost certainly involved, our data indicate that there are at least two pharmacologically distinct types of slow EPSPs in the VIP secretomotor neurons: one mediated by P2Y receptors and the other in part by mGluR(1) receptors.

Identification of key residues that cause differential gallbladder response to PACAP and VIP in the guinea pig.[Pubmed:16901992]

Am J Physiol Gastrointest Liver Physiol. 2007 Jan;292(1):G76-83.

Pituitary adenylate cyclase-activating polypeptide (PACAP) and vasoactive intestinal polypeptide (VIP) have opposite actions on the gallbladder; PACAP induces contraction, whereas VIP induces relaxation. Here, we have attempted to identify key residues responsible for their interactions with PACAP (PAC1) and VIP (VPAC) receptors in the guinea pig gallbladder. We synthesized PACAP-27/VIP hybrid peptides and compared their actions on isolated guinea pig gallbladder smooth muscle strips using isotonic transducers. [Ala4]- and [Val5]PACAP-27 were more potent than PACAP-27 in stimulating the gallbladder. In contrast, [Ala4, Val5]- and [Ala4, Val5, Asn9]PACAP-27 induced relaxation similarly to VIP. [Asn9]-, [Thr11]-, or [Leu13]PACAP-27 had 20-70% contractile activity of PACAP-27, whereas [Asn24,Ser25,Ile26]PACAP-27 showed no change in the activity. All VIP analogs, including [Gly4,Ile5,Ser9]VIP, induced relaxation. In the presence of a PAC1 receptor antagonist, PACAP(6-38), the contractile response to PACAP-27 was inhibited and relaxation became evident. RT-PCR analysis revealed abundant expressions of PAC1 receptor, "hop" splice variant, and VPAC1 and VPAC2 receptor mRNAs in the guinea pig gallbladder. In conclusion, PACAP-27 induces contraction of the gallbladder via PAC1/hop receptors. Gly4 and Ile5 are the key NH2-terminal residues of PACAP-27 that distinguish PAC1/hop receptors from VPAC1/VPAC2 receptors. However, both the NH2-terminal and alpha-helical regions of PACAP-27 are required for initiating gallbladder contraction.

Vasoactive intestinal peptide shortens both G1 and S phases of neural cell cycle in whole postimplantation cultured mouse embryos.[Pubmed:9751145]

Eur J Neurosci. 1998 May;10(5):1734-42.

Vasoactive intestinal peptide, a trophic and mitogenic factor, stimulates growth in whole cultured mouse embryos. Inhibition of this growth function between embryonic days 9 and 11 induces growth retardation accompanied by severe microcephaly. In the present study, to determine the effects of this peptide on the different phases of the cell cycle of neural cells, embryonic day 9.5 cultured mouse embryos were cumulatively labelled with bromodeoxyuridine. Vasoactive intestinal peptide (10(-7)M) shortened S phase and G1 phase of neuroepithelial cells by 50% (4.8-2.4 h) and 58% (1.9-0.8 h), respectively, compared with controls. G2 and M phases were not modified by vasoactive intestinal peptide treatment. Total cell cycle length was consequently reduced by 43% (8.2-4.7 h) in vasoactive intestinal peptide treated embryos, compared with controls. In contrast, vasoactive intestinal peptide did not modify the rate of neuroepithelial cell death as assessed by the proportion of nuclei containing fragmented DNA. These data suggest that vasoactive intestinal peptide stimulates growth in premigratory stages of nervous system development by shortening S and G1 phases of the cell cycle and that S phase duration can be regulated by a physiological peptide.

Interactive mechanisms among pituitary adenylate cyclase-activating peptide, vasoactive intestinal peptide, and parathyroid hormone receptors in guinea pig cecal circular smooth muscle cells.[Pubmed:9607796]

Endocrinology. 1998 Jun;139(6):2869-78.

Vasoactive intestinal peptide (VIP) causes relaxation of smooth muscle cells via both VIP-specific receptor coupled to nitric oxide synthase and VIP-preferring receptor coupled to adenylate cyclase. Because the mechanism of interaction among VIP, pituitary adenylate cyclase-activating peptide (PACAP), and PTH is still unclear, the characteristics of the receptors for PACAP and PTH in circular muscle cells obtained from the guinea pig cecum were investigated. The effects of an inhibitor of cAMP-dependent protein kinase [cyclic adenosine 3',5'-monophosphorothioate (Rp-cAMPS)], guanylate cyclase inhibitors, antagonists of these peptides, and the selective receptor protection on the relaxing effect produced by PACAP, VIP, and PTH were examined. PACAP-induced relaxation was significantly inhibited by a VIP antagonist, a PTH antagonist, Rp-cAMPS, and an inhibitor of particulate guanylate cyclase. VIP-induced relaxation was significantly inhibited by a PACAP antagonist and a PTH antagonist. PTH-induced relaxation was significantly inhibited by a VIP-specific receptor antagonist and Rp-cAMPS, but not by a PACAP antagonist. A PTH antagonist significantly inhibited a VIP-preferring receptor agonist-induced relaxation. The muscle cells in which cholecystokinin octapeptide and PTH receptors were protected completely abolished the inhibitory responses to VIP and PACAP. The muscle cells in which cholecystokinin octapeptide and VIP or PACAP receptors were protected completely abolished the inhibitory response to PTH. This study shows that PACAP induces relaxation of these muscle cells via both VIP-preferring receptor coupled to adenylate cyclase and PACAP-specific receptor, and that PTH induces relaxation of the muscle cells via PTH-specific receptor coupled to adenylate cyclase. In addition, the results of a selective receptor protection show that PTH does not bind to VIP receptors, and that VIP does not bind to PTH receptor. Therefore, this study first demonstrates the presence of one-way inhibitory mechanisms from the PTH-specific receptor to the VIP-preferring receptor, and from the VIP-specific receptor to the PTH-specific receptor in the mechanisms of interaction between VIP and PTH.

Transmitter role of vasoactive intestinal peptide.[Pubmed:8103215]

Pharmacol Toxicol. 1993 Jun;72(6):354-63.

Vasoactive intestinal polypeptide (VIP) is a 28 amino acid with a wide-spread neuronal localization. VIP fulfils many of the classical criteria for neurotransmission. In the cerebral cortex bipolar VIP neurones are involved in the coupling between energy metabolism, blood flow and neuronal activity. Furthermore, VIP in the brain plays a role in circadian rhythms and melatonin and pituitary hormone secretion. In the peripheral nervous system VIP is the transmitter of a number of non-cholinergic, non-adrenergic autonomic events. Thus, the peptide is involved in the control of smooth muscle tone and motility, blood flow and secretion in the digestive tract, respiratory tract and urogenital tract. The effects of VIP are mediated by a specific membrane-bound receptor linked to adenylate cyclase via a stimulatory G-protein. It is likely that impairment of VIP nerves is involved in some autonomic dysfunctions, an example being male impotence which is successfully treated with VIP injections.

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