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VIP Guia & Tabela de Dose

A vasoactive intestinal peptide studied for inflammation and CIRS.

Também conhecido comoVasoactive Intestinal Peptide
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VIP — Tabela de dose
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What is VIP?

VIP stands for Vasoactive Intestinal Peptide. It is a tiny protein — just 28 amino acids long — that your body makes naturally.[5] Despite the name, VIP does a lot more than affect intestines or blood vessels. It acts as a neuropeptide, which means it carries signals in both the brain and the rest of the nervous system.[2] Think of it as a chemical messenger with a very wide reach: researchers have found VIP receptors in the gut, lungs, immune cells, brain, and many other tissues.[3]

VIP was first described decades ago and has been studied ever since for its surprisingly broad roles in the body — from calming inflammation to supporting nerve health.[4] Today it sits at the crossroads of immunology, neurology, and gut biology, making it a popular subject for research.

How VIP Works

Here is a simple way to picture it. Imagine your immune system as a crowd that sometimes gets too loud and starts a riot (inflammation). VIP is like a calm, authoritative voice that tells the crowd to settle down. It does this by binding to two specific receptor types on cells — called VPAC1 and VPAC2.[5] Once VIP locks onto one of those receptors, it triggers a rise in a molecule called cyclic AMP inside the cell.[3] That signal cascade dials back the production of inflammatory chemicals and helps restore order.

On the nerve side, VIP supports the survival of neurons — the cells that make up your brain and spinal cord.[6] It does this partly by prompting nearby support cells (called glial cells) to release protective, growth-promoting factors and to reduce inflammation around neurons.[6]

What the Research Shows

Studies going back to the early 1980s established VIP as a genuine neuroregulator — a molecule that acts like a neurotransmitter in the brain, a hormone-like signal at the pituitary gland, and a local chemical messenger in organs like the gut.[2] Early receptor research showed that cells in many different tissues carry VIP receptors and that the peptide is rapidly taken up and broken down after doing its job.[3]

More recent work has focused on inflammation. Multiple animal studies have shown that VIP inhibits the production and activity of inflammatory mediators, and researchers have begun exploring its therapeutic potential in models of human inflammatory disease.[4] In one fish model, VIP reduced key inflammatory signaling molecules (including P65, P38, and MyD88) and protected the animals from a bacterial infection — while also promoting the controlled cell-death processes that help clear damaged tissue.[1]

In neuroscience, a 2017 review concluded that VIP can help brake the chain of events that leads to neuron death in conditions like Alzheimer's and Parkinson's disease. The protection appears to work indirectly — through glial cells that ramp up neurotrophic (nerve-nourishing) factors and turn down pro-inflammatory signals.[6]

A major practical challenge is that natural VIP breaks down quickly in the body. Researchers at the NIH developed simplified analogs — modified versions of VIP — that are more metabolically stable and can selectively target either VPAC1 or both VPAC receptors at once.[5] These analogs are helping scientists pin down exactly which receptor is responsible for which effect.

What VIP Is Being Studied For

  • Inflammation and immune regulation — calming overactive immune responses[4]
  • CIRS (Chronic Inflammatory Response Syndrome) — an area of active clinical interest linked to VIP's anti-inflammatory properties
  • Neurodegenerative diseases — protecting neurons in conditions like Alzheimer's and Parkinson's[6]
  • Gut health and motility — VIP has well-established roles in intestinal function[2]
  • Infectious disease defense — animal models show VIP can help fight bacterial infections[1]
  • Receptor-targeted cancer imaging — because some tumors overexpress VIP receptors, stable analogs are being explored as imaging and cytotoxicity tools[5]

How VIP Is Dosed in Research

Dosing protocols for VIP vary considerably across studies depending on the research model, the route of administration, and the specific outcome being measured. Because no standardized human dosing has been established, researchers rely on published preclinical data as a starting point. See the dosage chart on this page for a structured overview of doses reported in the literature, and use the calculator to work out volume and concentration once you have reconstituted your peptide. As always, these figures are for research reference only and do not constitute medical advice.

Mixing and Storing VIP

VIP is typically supplied as a lyophilized (freeze-dried) white powder. To reconstitute it, researchers generally add a small volume of sterile bacteriostatic water or an appropriate sterile solvent slowly along the side of the vial — not directly onto the powder — then gently swirl (do not shake) until fully dissolved. Because VIP degrades quickly at body temperature,[5] reconstituted solution should be stored at 2–8 °C (refrigerator temperature) and used within a short window, typically a few days to a couple of weeks depending on concentration. For longer-term storage before reconstitution, keep the dry powder at −20 °C and protect it from light and moisture. Always label vials with the date of reconstitution and discard any solution that appears cloudy or discolored.

Sources

  1. Vasoactive Intestinal Peptide (VIP) Protects Nile Tilapia (Oreochromis niloticus) against Streptococcus agalatiae Infection. — International journal of molecular sciences, 2022. PMID 36499231.
  2. A new neuroregulator: the vasoactive intestinal peptide or VIP. — Molecular and cellular endocrinology, 1982. PMID 6290287.
  3. The vasoactive intestinal peptide (VIP) receptor: recent data and hypothesis. — Biochimie, 1988. PMID 2852963.
  4. Editorial: vasoactive intestinal peptide (vip): historic perspective and future potential. — Endocrine, metabolic & immune disorders drug targets, 2012. PMID 23094826.
  5. Development of simplified vasoactive intestinal peptide analogs with receptor selectivity and stability for human vasoactive intestinal peptide/pituitary adenylate cyclase-activating polypeptide receptors. — The Journal of pharmacology and experimental therapeutics, 2005. PMID 15994369.
  6. The effects of vasoactive intestinal peptide in neurodegenerative disorders. — Neurological research, 2017. PMID 27786097.

VIP Perguntas

What is VIP (Vasoactive Intestinal Peptide)?
VIP is a naturally occurring 28-amino acid neuropeptide found throughout the brain, gut, lungs, and immune system.[5] It was identified as a key neuroregulator decades ago and is now studied for its wide-ranging roles in inflammation, nerve health, and gut function.[2] In research settings it is used as a reference compound and as the basis for more stable analogs.
How does VIP work in the body?
VIP binds to two receptor subtypes — VPAC1 and VPAC2 — on the surface of cells.[5] That binding triggers a rise in cyclic AMP inside the cell, which in turn dials back inflammatory signaling.[3] In the nervous system, VIP also prompts support cells to release neuroprotective factors and reduce inflammation around neurons.[6]
What is VIP used for in research?
Researchers are studying VIP mainly for its anti-inflammatory and neuroprotective properties.[4] Animal models show it can suppress inflammatory mediators, protect against bacterial infection,[1] and slow neuron death in models of Alzheimer's and Parkinson's disease.[6] Interest has also grown in its potential role in Chronic Inflammatory Response Syndrome (CIRS).
How is VIP dosed in research studies?
There is no single standard dose for VIP research — protocols differ by model, route, and goal. Natural VIP degrades rapidly, so researchers often use more stable analogs at carefully controlled concentrations.[5] Check the dosage chart on this page for a literature-based reference range, and use the calculator to convert dose to volume. These are research figures only, not medical guidance.
How do you reconstitute VIP peptide?
Add sterile bacteriostatic water slowly along the inside wall of the vial — never directly onto the powder — and gently swirl until dissolved. Do not shake. Store reconstituted VIP at 2–8 °C and use within a few days to two weeks. Keep the unreconstituted powder frozen at −20 °C, protected from light and moisture, until needed.[5]
Is VIP considered safe?
VIP is an endogenous peptide — your body already produces it naturally — and it has been studied in research models for decades without major toxicity signals.[4] However, it breaks down quickly and its effects are dose- and context-dependent.[5] All research use should follow appropriate institutional protocols. This page is educational only and does not constitute medical advice.