Galanin (porcine)

Galanin receptor agonist CAS# 88813-36-9

Galanin (porcine)

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Chemical structure

Galanin (porcine)

3D structure

Chemical Properties of Galanin (porcine)

Cas No. 88813-36-9 SDF Download SDF
PubChem ID 16174786 Appearance Powder
Formula C146H213N43O40 M.Wt 3210.55
Type of Compound N/A Storage Desiccate at -20°C
Solubility Soluble to 0.50 mg/ml in water
Sequence GWTLNSAGYLLGPHAIDNHRSFHDKYGLA

(Modifications: Ala-29 = C-terminal amide)

SMILES CCC(C)C(C(=O)NC(CC(=O)O)C(=O)NC(CC(=O)N)C(=O)NC(CC1=CNC=N1)C(=O)NC(CCCNC(=N)N)C(=O)NC(CO)C(=O)NC(CC2=CC=CC=C2)C(=O)NC(CC3=CNC=N3)C(=O)NC(CC(=O)O)C(=O)NC(CCCCN)C(=O)NC(CC4=CC=C(C=C4)O)C(=O)NCC(=O)NC(CC(C)C)C(=O)NC(C)C(=O)N)NC(=O)C(C)NC(=O)C(CC5=CNC=N5)NC(=O)C6CCCN6C(=O)CNC(=O)C(CC(C)C)NC(=O)C(CC(C)C)NC(=O)C(CC7=CC=C(C=C7)O)NC(=O)CNC(=O)C(C)NC(=O)C(CO)NC(=O)C(CC(=O)N)NC(=O)C(CC(C)C)NC(=O)C(C(C)O)NC(=O)C(CC8=CNC9=CC=CC=C98)NC(=O)CN
Standard InChIKey SLZIZIJTGAYEKK-UHFFFAOYSA-N
Standard InChI InChI=1S/C146H213N43O40/c1-15-75(10)119(187-123(207)78(13)167-129(213)101(51-84-60-154-68-162-84)182-143(227)110-31-24-42-189(110)116(200)65-161-124(208)93(43-71(2)3)173-130(214)95(45-73(6)7)174-132(216)98(49-82-34-38-88(194)39-35-82)170-114(198)63-159-122(206)77(12)166-141(225)108(66-190)186-137(221)105(55-112(150)196)179-131(215)96(46-74(8)9)183-145(229)120(79(14)192)188-140(224)100(168-113(197)58-148)50-83-59-158-90-28-20-19-27-89(83)90)144(228)184-107(57-118(203)204)139(223)180-104(54-111(149)195)136(220)178-102(52-85-61-155-69-163-85)134(218)172-92(30-23-41-157-146(152)153)127(211)185-109(67-191)142(226)176-99(47-80-25-17-16-18-26-80)133(217)177-103(53-86-62-156-70-164-86)135(219)181-106(56-117(201)202)138(222)171-91(29-21-22-40-147)126(210)175-97(48-81-32-36-87(193)37-33-81)125(209)160-64-115(199)169-94(44-72(4)5)128(212)165-76(11)121(151)205/h16-20,25-28,32-39,59-62,68-79,91-110,119-120,158,190-194H,15,21-24,29-31,40-58,63-67,147-148H2,1-14H3,(H2,149,195)(H2,150,196)(H2,151,205)(H,154,162)(H,155,163)(H,156,164)(H,159,206)(H,160,209)(H,161,208)(H,165,212)(H,166,225)(H,167,213)(H,168,197)(H,169,199)(H,170,198)(H,171,222)(H,172,218)(H,173,214)(H,174,216)(H,175,210)(H,176,226)(H,177,217)(H,178,220)(H,179,215)(H,180,223)(H,181,219)(H,182,227)(H,183,229)(H,184,228)(H,185,211)(H,186,221)(H,187,207)(H,188,224)(H,201,202)(H,203,204)(H4,152,153,157)
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 Galanin (porcine)

DescriptionEndogenous porcine galanin receptor agonist (pKi values are 9.63, 9.49, 9.02, 8.98, 8.01 and 8.14 at hGAL1, rGAL1, hGAL2, rGAL2, hGAL3 and rGAL3 respectively). Significantly increases food intake under free access conditions and also has roles in learning and memory, anxiety and sexual behavior.

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References on Galanin (porcine)

The contractile effects of several substituted short analogues of porcine galanin in isolated rat jejunal and colonic smooth muscle strips.[Pubmed:15946852]

Pharmacol Res. 2005 Oct;52(4):283-9.

The activity of short porcine galanin (Gal) analogues was tested in vitro using rat jejunal and colonic smooth muscle strips. Peptides evoked concentration-dependent tissue contractions yielding typical response curves in concentration range from 0.3 nM to 300 microM, with a characteristic fall-down effect at the supramaximal concentrations. Gal(1-15) was less potent than Gal(1-29). Furthermore, [D-Trp(2)]Gal(1-15), [endo-Trp(2),Cle(4)]Gal(1-15), [D-Leu(4)]Gal(1-15), [des-Leu(4)]Gal(1-15), [Hse(6)]Gal(1-15), [Dab(14)]Gal(1-15), [Dpr(14)]Gal(1-15) or [Arg(14)]Gal(1-15) showed a considerable decrease in potency compared to Gal(1-15) in jejunal and/or colonic smooth muscle cells. Functional evidence confirmed that the integrity of both N- and C-terminals must be preserved in order to preserve a full excitatory myogenic potential of the peptide in rat jejunum and colon. Besides, amino acids located in positions 2, 4, 6 and 14 play a crucial role in recognition and activation of molecular domains responsible for Gal action in the intestinal smooth muscle.

Effects of vasoactive intestinal peptide and galanin on survival of cultured porcine myenteric neurons.[Pubmed:15582731]

Regul Pept. 2005 Feb 15;125(1-3):185-92.

Enteric neuronal plasticity is probably fundamental in order to withstand injury or changes in intestinal activity. The role of the neuropeptides in neuroprotection is still enigmatic. The expression of galanin and vasoactive intestinal peptide (VIP) and the effects of the two peptides on survival of small intestinal porcine myenteric neurons cultured for 6 days were studied. Immunocytochemistry and cell counting were used to evaluate the numbers of surviving neurons and their expression of galanin and VIP. To reflect the in vivo situation, cryostat sections of porcine mid-jejunum were used. A concentration-dependent and marked increase in neuronal survival was noted when neurons were grown in the presence of VIP (10(-8)-10(-6) M), whereas addition of galanin (10(-8)-10(-6) M) slightly decreased neuronal survival. A dramatic increase in the proportions of myenteric neurons containing VIP or galanin immunoreactivity occurred during culturing. The presence of VIP further increased the number of galanin-expressing neurons. A majority of the galanin-immunoreactive neurons lacked VIP, while all VIP-immunoreactive neurons contained galanin. In conclusion, culturing porcine myenteric neurons in the presence of VIP increases, while the presence of galanin reduces, survival. Culturing significantly increased the proportion of neurons expressing VIP and/or galanin; the presence of VIP further increased the number of galanin-expressing neurons.

Localization of substance P, calcitonin gene related peptide and galanin in the nerve fibers of porcine cystic ovaries.[Pubmed:22252756]

Folia Histochem Cytobiol. 2011;49(4):622-30.

In a previous study, we showed that both the noradrenergic and cholinergic component of ovarian innervation is markedly changed in porcine cystic ovaries. The present study is aimed at elucidating the distribution pattern of substance P- (SP), calcitonin gene related peptide CGRP- and/or galanin (GAL)-containing nerve fibers within porcine cystic ovaries. The status polycysticus was induced by dexamethasone phosphate disodium salt i.m. injections performed from the 7(th) until the 21(st) day of the first studied estrous cycle. During the same period of time, gilts of the control group received saline. All animals were slaughtered on the expected 11(th) day of the second studied estrous cycle, and their ovaries were collected. When compared to control gonad, a distinct difference in the distribution pattern and the density of SP-, CGRP- and/or GAL-immunoreactive (GAL-IR) nerve fibers was observed. Thus, unlike in the control gonad, SP- and/or CGRP-IR perivascular nerve fibers were found to supply medullar blood vessels of polycystic ovary. Furthermore, the number of GAL-IR nerve fibers contributing to the ground plexus in polycystic ovaries was higher than that observed in the control gonads. Thus, as may be judged from the profound changes in the distribution pattern of differently chemically coded afferent terminals within polycystic gonads, it appears possible that neuropeptides released from these terminals may take part in the etiopathogenesis of this disorder.

Inflammation- and axotomy-induced changes in galanin-like immunoreactive (GAL-LI) nerve structures in the porcine descending colon.[Pubmed:20159743]

Acta Vet Hung. 2010 Mar;58(1):91-103.

This study reports on changes caused by chemically driven inflammation and axotomy in galanin-like immunoreactive (GAL-LI) nerve structures in the porcine descending colon. The distribution pattern of GAL-LI structures was studied using the immunofluorescence technique in the circular muscle layer, the myenteric (MP), outer submucous (OSP) and inner submucous plexuses (ISP), and also in the mucosal layer. Under physiological conditions GAL-LI perikarya were shown to constitute 3.68 +/- 0.32%, 7.02 +/- 0.93% and 10.99 +/- 0.71% in MP, OSP and ISP, respectively. Both colitis and axotomy caused an increase in GAL-like immunoreactivity, which was different in particular parts of the bowel segment studied. The numbers of GAL-LI perikarya increased to 14.16 +/- 0.49%, 16.78 +/- 1.09% and 37.46 +/- 1.18% during colitis and 7.92 +/- 0.72%, 10.44 +/- 0.71% and 16.20 +/- 0.96% after axotomy in MP, OSP and ISP, respectively. Both these processes caused an increase in the number of GAL-LI nerve fibres in the circular muscle and mucosal layers as well as the appearance of a population of GAL-LI cells in the mucosa.

Galanin stimulation of feeding is blocked by the addition of a response requirement.[Pubmed:18729649]

Behav Neurosci. 2008 Aug;122(4):949-53.

Administration of the neuropeptide galanin increases food intake in laboratory rats and mice, however this increase has only been observed under conditions of free-feeding. As there is a growing distinction between consummatory and instrumental behavior, we assessed whether galanin would differentially affect food consumption when food was freely available or when the same food was response-contingent. We also tested whether food restriction would interact with galanin's effect on food consumption in either condition. As in previous studies, galanin significantly increased food consumption under free access conditions. However, when food was contingent upon lever-pressing, galanin had no such stimulatory effect. Food-restriction increased basal feeding levels in both tasks but there was no interaction between food restriction and free or response-contingent food intake. These results demonstrate that galanin-induced feeding stimulation is limited to conditions of free access and support the theoretical distinction between consummatory and instrumental behavior.

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