{"id":71505,"date":"2026-05-20T10:30:00","date_gmt":"2026-05-20T10:30:00","guid":{"rendered":"https:\/\/medsbase.com\/vip-vasoactive-intestinal-peptide\/"},"modified":"2026-05-21T07:14:08","modified_gmt":"2026-05-21T07:14:08","slug":"vip-vasoactive-intestinal-peptide","status":"publish","type":"product","link":"https:\/\/medsbase.com\/nl\/vip-vasoactive-intestinal-peptide\/","title":{"rendered":"VIP (Vasoactive Intestinal Peptide) \u2014 Research Grade"},"content":{"rendered":"<p><!-- medsbase-tldr-answer --><\/p>\n<div style=\"background: #fff8e1; border-left: 4px solid #f5a623; padding: 18px 22px; margin: 18px 0; border-radius: 4px;\">\n<h3 style=\"margin: 0 0 8px 0; font-size: 16px; color: #1a4a6b;\">Quick Answer \u2014 What is VIP (Vasoactive Intestinal Peptide)?<\/h3>\n<p style=\"margin: 0;\"><strong>VIP<\/strong> (Vasoactive Intestinal Peptide; CAS 40077-57-4, MW 3,325.79 g\/mol) is a synthetic 28-amino-acid neuropeptide identical to native human VIP. Sequence: His-Ser-Asp-Ala-Val-Phe-Thr-Asp-Asn-Tyr-Thr-Arg-Leu-Arg-Lys-Gln-Met-Ala-Val-Lys-Lys-Tyr-Leu-Asn-Ser-Ile-Leu-Asn-NH<sub>2<\/sub> (C-terminal amide). Member of the <strong>VIP\/PACAP \/ secretin-glucagon superfamily<\/strong>. VIP acts at <strong>VPAC1 and VPAC2 receptors<\/strong> (Gs-coupled GPCRs) to produce a remarkable breadth of physiological effects: vasodilation, intestinal smooth-muscle relaxation, exocrine secretion, neurotransmitter modulation, sleep \/ circadian regulation, and broad <strong>anti-inflammatory \/ immune-modulating activity<\/strong>. Published research focuses on VIP&#8217;s role in Th2-polarised immune-modulation, autoimmune-disease pharmacology (RA, MS, IBD models), and neuroprotection. For laboratory research use only.<\/p>\n<\/div>\n<div class=\"medsbase-trust-strip\" style=\"background: #f4f8fb; border: 1px solid #d8e3eb; padding: 12px 16px; margin: 16px 0; border-radius: 4px; font-size: 14px;\"><strong>Wat u krijgt bij MedsBase:<\/strong> Lyophilized \u226599% HPLC-verified VIP \u00b7 COA available on request \u00b7 Discreet temperature-stable packaging \u00b7 Worldwide research-supply courier \u00b7 1,400+ verified <a href=\"https:\/\/medsbase.com\/nl\/reviews\/\">klantbeoordelingen<\/a><\/div>\n<p class=\"medsbase-reship-line\" style=\"font-size: 14px; color: #444; margin: 8px 0 18px;\">\ud83d\udce6 Elke bestelling is gedekt door onze <a href=\"https:\/\/medsbase.com\/nl\/medsbase-re-shipment-assurance-policy\/\"><strong>Reshipment Assurance Policy<\/strong><\/a> \u2014 als uw pakket niet binnen 20 werkdagen arriveert, sturen wij het opnieuw.<\/p>\n<table class=\"medsbase-spec-table\" style=\"width: 100%; border-collapse: collapse; margin: 18px 0; font-size: 14px;\">\n<thead>\n<tr style=\"background: #2c7cb0; color: #fff;\">\n<th style=\"padding: 8px 12px;\">Specificatie<\/th>\n<th style=\"padding: 8px 12px;\">Detail<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr style=\"background: #f9f9f9;\">\n<td style=\"padding: 8px 12px; border-bottom: 1px solid #e0e0e0;\"><strong>Compound Class<\/strong><\/td>\n<td style=\"padding: 8px 12px; border-bottom: 1px solid #e0e0e0;\">Synthetic 28-aa neuropeptide; VPAC1 \/ VPAC2 receptor agonist; secretin-glucagon superfamily member<\/td>\n<\/tr>\n<tr>\n<td style=\"padding: 8px 12px; border-bottom: 1px solid #e0e0e0;\"><strong>CAS-nummer<\/strong><\/td>\n<td style=\"padding: 8px 12px; border-bottom: 1px solid #e0e0e0;\">40077-57-4 (human VIP)<\/td>\n<\/tr>\n<tr style=\"background: #f9f9f9;\">\n<td style=\"padding: 8px 12px; border-bottom: 1px solid #e0e0e0;\"><strong>Sequentie<\/strong><\/td>\n<td style=\"padding: 8px 12px; border-bottom: 1px solid #e0e0e0;\">His-Ser-Asp-Ala-Val-Phe-Thr-Asp-Asn-Tyr-Thr-Arg-Leu-Arg-Lys-Gln-Met-Ala-Val-Lys-Lys-Tyr-Leu-Asn-Ser-Ile-Leu-Asn-NH<sub>2<\/sub> (HSDAVFTDNYTRLRKQMAVKKYLNSILN-NH<sub>2<\/sub>; 28 aa; C-terminal amide)<\/td>\n<\/tr>\n<tr>\n<td style=\"padding: 8px 12px; border-bottom: 1px solid #e0e0e0;\"><strong>Moleculair gewicht<\/strong><\/td>\n<td style=\"padding: 8px 12px; border-bottom: 1px solid #e0e0e0;\">3,325.79 g\/mol<\/td>\n<\/tr>\n<tr style=\"background: #f9f9f9;\">\n<td style=\"padding: 8px 12px; border-bottom: 1px solid #e0e0e0; width: 30%;\"><strong>Molecuulformule<\/strong><\/td>\n<td style=\"padding: 8px 12px; border-bottom: 1px solid #e0e0e0;\">C<sub>147<\/sub>H<sub>237<\/sub>N<sub>43<\/sub>O<sub>43<\/sub>S; MW 3326.78 g\/mol (28-aa free-amide neuropeptide).<\/td>\n<\/tr>\n<tr style=\"background: #f9f9f9;\">\n<td style=\"padding: 8px 12px; border-bottom: 1px solid #e0e0e0;\"><strong>Werkingsmechanisme<\/strong><\/td>\n<td style=\"padding: 8px 12px; border-bottom: 1px solid #e0e0e0;\">Binds <strong>VPAC1<\/strong> (broad distribution: lung, GI tract, T cells, brain, liver) and <strong>VPAC2<\/strong> (smooth muscle, mast cells, CNS) with similar affinity (low-nM K<sub>D<\/sub>). Both receptors are Gs-coupled \u2014 raises intracellular cAMP, activates PKA, drives downstream tissue-specific effects. Also has lower-affinity engagement of PAC1 receptor (the PACAP-preferred receptor).<\/td>\n<\/tr>\n<tr>\n<td style=\"padding: 8px 12px; border-bottom: 1px solid #e0e0e0;\"><strong>Form \/ Purity \/ Storage<\/strong><\/td>\n<td style=\"padding: 8px 12px; border-bottom: 1px solid #e0e0e0;\">Lyophilized white-to-off-white powder, \u226599% HPLC. Store 2\u20138 \u00b0C short-term, \u221220 \u00b0C long-term (\u226536 months). Reconstituted: 2\u20138 \u00b0C, use within 30 days.<\/td>\n<\/tr>\n<tr style=\"background: #f9f9f9;\">\n<td style=\"padding: 8px 12px; border-bottom: 1px solid #e0e0e0;\"><strong>Onderzoeksgebruik<\/strong><\/td>\n<td style=\"padding: 8px 12px; border-bottom: 1px solid #e0e0e0;\">For laboratory research use only. Not on the WADA Prohibited List. Aviptadil (synthetic VIP formulation) had inhalation-route Phase III research for COVID-19 ARDS but did not gain regulatory approval.<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p><!-- \/medsbase-tldr-answer --><\/p>\n<h2>Mechanism of Action \u2014 VPAC1 \/ VPAC2 Pharmacology<\/h2>\n<ul>\n<li><strong>Dual VPAC1 + VPAC2 agonism<\/strong> \u2014 VIP binds both receptors with similar affinity. VPAC1 distribution is broad (lung, GI, T cells, hepatocytes, brain). VPAC2 is concentrated on smooth muscle, mast cells, CNS, and selected immune-cell populations.<\/li>\n<li><strong>cAMP-PKA cascade<\/strong> \u2014 Both VPAC receptors are Gs-coupled, drive adenylate cyclase, raise cAMP, and activate PKA. Downstream tissue-specific effects depend on PKA substrate availability.<\/li>\n<li><strong>Smooth-muscle relaxation<\/strong> \u2014 VPAC2-mediated cAMP rise in airway smooth muscle drives bronchodilation; in GI smooth muscle drives intestinal relaxation; in vascular smooth muscle drives vasodilation.<\/li>\n<li><strong>Th2-polarised immune modulation<\/strong> \u2014 VPAC1 activation on T cells drives Th2 polarisation, suppresses Th1 cytokine production (IFN-\u03b3, IL-12), reduces TNF-\u03b1 \/ IL-6 inflammatory output, increases IL-10 \/ TGF-\u03b2 regulatory cytokines. Net effect is anti-inflammatory in autoimmune-disease models (rheumatoid arthritis, multiple sclerosis, inflammatory bowel disease, sepsis).<\/li>\n<li><strong>Mast-cell modulation<\/strong> \u2014 VIP releases histamine from mast cells at high concentrations but can also stabilise mast-cell granule release in some contexts (concentration- and tissue-dependent).<\/li>\n<li><strong>Neuroprotection<\/strong> \u2014 VPAC2 on CNS neurons drives PKA-CREB pro-survival signalling; published research in ischaemic stroke, Parkinson&#8217;s-disease, and neurodegeneration models has documented neuroprotective effects.<\/li>\n<li><strong>Circadian regulation<\/strong> \u2014 VIP is the master coupling neurotransmitter of the suprachiasmatic nucleus (SCN), synchronising individual SCN neurons into the coordinated master clock that drives circadian rhythm.<\/li>\n<\/ul>\n<h2>Gepubliceerde onderzoeksapplicaties<\/h2>\n<ul>\n<li><strong>VPAC receptor pharmacology<\/strong> \u2014 canonical reference compound for VPAC1\/VPAC2 research<\/li>\n<li><strong>Autoimmune-disease research<\/strong> \u2014 published anti-inflammatory effects in RA, MS, IBD, sepsis models<\/li>\n<li><strong>Pulmonary research<\/strong> \u2014 Aviptadil (synthetic VIP inhalation) studied for sarcoidosis, pulmonary fibrosis, COVID-19 ARDS<\/li>\n<li><strong>Vasodilation pharmacology<\/strong> \u2014 historical research on VIP-mediated vascular and erectile function<\/li>\n<li><strong>Circadian rhythm research<\/strong> \u2014 SCN-network coupling pharmacology<\/li>\n<li><strong>Th1\/Th2 polarisation research<\/strong> \u2014 VIP is canonical Th2-polarising peptide alongside IL-4<\/li>\n<li><strong>Neuroprotection \/ neurodegeneration research<\/strong> \u2014 ischaemic stroke, Parkinson&#8217;s, Alzheimer&#8217;s models<\/li>\n<\/ul>\n<p>For related research peptides see <a href=\"https:\/\/medsbase.com\/nl\/oxytocin-acetate\/\">Oxytocine Acetaat<\/a> (posterior pituitary nonapeptide), <a href=\"https:\/\/medsbase.com\/nl\/selank\/\">Selank<\/a> (Russian-developed neuropeptide), <a href=\"https:\/\/medsbase.com\/nl\/semax\/\">Semax<\/a> (nootropic peptide), <a href=\"https:\/\/medsbase.com\/nl\/dsip\/\">DSIP<\/a> (delta sleep-inducing peptide), <a href=\"https:\/\/medsbase.com\/nl\/thymosin-alpha-1\/\">Thymosin Alpha-1<\/a> (immune modulator). Browse the full <a href=\"https:\/\/medsbase.com\/nl\/peptides\/\">peptide research catalog<\/a>.<\/p>\n<h2>Available Strengths<\/h2>\n<table style=\"width: 100%; border-collapse: collapse; margin: 16px 0;\">\n<thead>\n<tr style=\"background: #2c7cb0; color: #fff;\">\n<th style=\"padding: 10px;\">Vulsterkte<\/th>\n<th style=\"padding: 10px;\">Verpakkingsgroottes<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td style=\"padding: 10px; border: 1px solid #ddd;\"><strong>5 mg<\/strong> \u2014 standard research strength<\/td>\n<td style=\"padding: 10px; border: 1px solid #ddd;\">10 of 20 flesjes<\/td>\n<\/tr>\n<tr style=\"background: #f9f9f9;\">\n<td style=\"padding: 10px; border: 1px solid #ddd;\"><strong>10 mg<\/strong> \u2014 extended protocols, lower per-mg cost<\/td>\n<td style=\"padding: 10px; border: 1px solid #ddd;\">10 of 20 flesjes<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<div style=\"background: #f4f8fb; border-left: 4px solid #2c7cb0; padding: 14px 18px; margin: 18px 0;\"><strong class=\"mb-bac-water-callout\">\ud83d\udca7 Need BAC water?<\/strong> Reconstituting any lyophilized vial requires sterile bacteriostatic water. Pair this product with our <a href=\"\/nl\/bac-water\/\"><strong>BAC Water (Bacteriostatisch Water)<\/strong><\/a> \u2014 30 mL multi-dose vial, 0.9% benzyl-alcohol-preserved, USP-grade.<\/div>\n<h2>Opslag en Reconstituering<\/h2>\n<p>Lyophilized 2\u20138 \u00b0C short-term, \u221220 \u00b0C long-term. Reconstitute with bacteriostatic water (1.0 mL per 5\/10 mg vial \u2192 5 \/ 10 mg\/mL). Avoid freeze-thaw. VIP is sensitive to oxidation at the Met-17 residue \u2014 protect reconstituted solutions from prolonged air exposure.<\/p>\n<h2>FAQ<\/h2>\n<h3>Is VIP the same as PACAP?<\/h3>\n<p>No \u2014 they are related (same superfamily) but distinct peptides. PACAP-38 and PACAP-27 are alternative ligands of the same VPAC1\/VPAC2 receptors (with PAC1 selectivity not shared by VIP). VIP and PACAP have ~68% sequence identity.<\/p>\n<h3>What dose ranges are used in research?<\/h3>\n<p>Rodent in-vivo protocols typically use 1\u201310 nmol\/kg SC or IP. In-vitro work uses nanomolar concentrations. Aviptadil clinical inhalation dosing was 100 \u00b5g 3\u00d7 daily in COVID-19 research.<\/p>\n<h3>Why is VIP plasma half-life short?<\/h3>\n<p>VIP is rapidly degraded by neutral endopeptidase (NEP) and other peptidases with plasma half-life of approximately 2 minutes. This makes SC \/ IP dosing the standard research route; inhalation delivery (Aviptadil) bypasses first-pass plasma clearance for pulmonary indications.<\/p>\n<div class=\"medsbase-trust-strip\" style=\"background: #f4f8fb; border: 1px solid #d8e3eb; padding: 12px 16px; margin: 20px 0 8px; border-radius: 4px; font-size: 14px;\"><strong>Why order research compounds from MedsBase:<\/strong> Lyophilized HPLC \u226599% peptides &amp; compounds \u00b7 COA available on request \u00b7 Discreet temperature-stable packaging \u00b7 Worldwide courier \u00b7 <a href=\"https:\/\/medsbase.com\/nl\/medsbase-re-shipment-assurance-policy\/\">Reshipment Assurance<\/a> on every order \u00b7 1,400+ verified <a href=\"https:\/\/medsbase.com\/nl\/reviews\/\">klantbeoordelingen<\/a><\/div>\n<p><!-- medsbase-related-alts-v1 --><\/p>\n<h2>Other Neuropeptide \/ Immune Research Peptides<\/h2>\n<ul>\n<li><a href=\"\/nl\/oxytocin-acetate\/\"><strong>Oxytocine Acetaat<\/strong><\/a> \u2014 Posterior pituitary nonapeptide<\/li>\n<li><a href=\"\/nl\/selank\/\"><strong>Selank<\/strong><\/a> \u2014 Russian anxiolytic neuropeptide<\/li>\n<li><a href=\"\/nl\/dsip\/\"><strong>DSIP<\/strong><\/a> \u2014 Delta sleep-inducing peptide<\/li>\n<li><a href=\"\/nl\/thymosin-alpha-1\/\"><strong>Thymosin Alpha-1<\/strong><\/a> \u2014 Immune-modulating peptide (Th1 polarisation; complementary)<\/li>\n<li><a href=\"\/nl\/ll-37-cathelicidin-antimicrobial-peptide\/\"><strong>LL-37 (Cathelicidin)<\/strong><\/a> \u2014 Innate-immunity antimicrobial peptide<\/li>\n<li><a href=\"\/nl\/bac-water\/\"><strong>BAC Water (Bacteriostatisch Water)<\/strong><\/a> \u2014 Required for reconstituting any lyophilized vial \u2014 sterile, 0.9% benzyl-alcohol-preserved diluent<\/li>\n<\/ul>","protected":false},"excerpt":{"rendered":"<p>\u2705 Synthetic 28-aa human neuropeptide (VIP\/PACAP family, secretin-glucagon superfamily)<br \/>\n\u2705 VPAC1 + VPAC2 receptor agonist (Gs-coupled GPCRs) \u2192 cAMP-PKA cascade<br \/>\n\u2705 Vasodilation, smooth-muscle relaxation, Th2-polarised immune modulation<br \/>\n\u2705 Master coupling neurotransmitter of suprachiasmatic-nucleus circadian rhythm<br \/>\n\u2705 CAS 40077-57-4; MW 3,325.79; C-terminal amide<\/p>\n<p><strong>VIP (Vasoactief Intestinaal Peptide)<\/strong> contains synthetic 28-aa human neuropeptide.<\/p>","protected":false},"featured_media":71532,"comment_status":"open","ping_status":"closed","template":"","meta":[],"product_brand":[],"product_cat":[5426],"product_tag":[6557,6494,6558,6554,6553,6555,6556],"class_list":{"0":"post-71505","1":"product","2":"type-product","3":"status-publish","4":"has-post-thumbnail","6":"product_cat-peptides","7":"product_tag-neuropeptide","8":"product_tag-research-peptide","9":"product_tag-th2-immune-modulator","10":"product_tag-vasoactive-intestinal-peptide","11":"product_tag-vip","12":"product_tag-vpac1-agonist","13":"product_tag-vpac2-agonist","15":"first","16":"instock","17":"shipping-taxable","18":"purchasable","19":"product-type-variable","20":"has-default-attributes"},"acf":[],"_links":{"self":[{"href":"https:\/\/medsbase.com\/nl\/wp-json\/wp\/v2\/product\/71505","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/medsbase.com\/nl\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/medsbase.com\/nl\/wp-json\/wp\/v2\/types\/product"}],"replies":[{"embeddable":true,"href":"https:\/\/medsbase.com\/nl\/wp-json\/wp\/v2\/comments?post=71505"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/medsbase.com\/nl\/wp-json\/wp\/v2\/media\/71532"}],"wp:attachment":[{"href":"https:\/\/medsbase.com\/nl\/wp-json\/wp\/v2\/media?parent=71505"}],"wp:term":[{"taxonomy":"product_brand","embeddable":true,"href":"https:\/\/medsbase.com\/nl\/wp-json\/wp\/v2\/product_brand?post=71505"},{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/medsbase.com\/nl\/wp-json\/wp\/v2\/product_cat?post=71505"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/medsbase.com\/nl\/wp-json\/wp\/v2\/product_tag?post=71505"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}