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As an indispensable endogenous neuropeptide active substance in the body, vasopressin (CAS:11000-17-2, molecular formula C₄₆H₆₅N₁₅O₁₂S₂, cyclic nine-amino-acid polypeptide with intramolecular disulfide bond) features stable polypeptide conformation under physiological aqueous environment, and the commercially available vasopressin 20 units injection is a common clinical specification prepared from refined active peptide raw material. Its physiological regulation scope is far beyond a single dimension. It always plays an implicit but crucial role in the fine regulation of neural behavior and the maintenance of the function of the gastrointestinal system.
This regulatory effect often runs through multiple links of physiological activity in the body, and has high specificity and synergy. This peptide substance relies on its unique cyclic molecular structure to achieve precise targeted localization toward specific tissue receptors distributed on nerve and gastrointestinal smooth muscle cells. By intervening in multiple core dimensions such as the transmission efficiency of synaptic signals, the regulation of cell differentiation, and smooth muscle contraction activity, it builds a bridge for the linkage between neural and somatic functions, providing solid support for the coordinated homeostasis of the body's neural somatic system.
Product Forms
Vasopressin COA
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| Certificate of Analysis | ||
| Compound name | Vasopressin | |
| Grade | Pharmaceutical grade | |
| CAS No. | 9034-50-8 | |
| Quantity | 38g | |
| Packaging standard | PE bag+Al foil bag | |
| Manufacturer | Shaanxi BLOOM TECH Co., Ltd | |
| Lot No. | 202601090086 | |
| MFG | Jan 9th 2026 | |
| EXP | Jan 8th 2028 | |
| Structure |
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| Item | Enterprise standard | Analysis result |
| Appearance | White or almost white powder | Conformed |
| Water content | ≤5.0% | 0.54% |
| Loss on drying | ≤1.0% | 0.42% |
| Heavy Metals | Pb≤0.5ppm | N.D. |
| As≤0.5ppm | N.D. | |
| Hg≤0.5ppm | N.D. | |
| Cd≤0.5ppm | N.D. | |
| Purity (HPLC) | ≥99.0% | 99.98% |
| Single impurity | <0.8% | 0.52% |
| Total microbial count | ≤750cfu/g | 95 |
| E. Coli | ≤2MPN/g | N.D. |
| Salmonella | N.D. | N.D. |
| Ethanol (by GC) | ≤5000ppm | 500ppm |
| Storage | Store in a sealed, dark, and dry place below -20°C | |
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| Chemical Formula | C43H67N15O12S2 | |
| Exact Mass | 1049.45 | |
| Molecular Weight | 1050.22 | |
| m/z | 1049.45 (100.0%), 1050.46 (46.5%), 1051.46 (10.6%), 1051.45 (9.0%), 1050.45 (5.5%), 1052.45 (4.2%), 1051.45 (2.6%), 1051.46 (2.5%), 1050.45 (1.6%), 1052.46 (1.6%), 1052.46 (1.1%) | |
| Elemental Analysis | C, 49.18; H, 6.43; N, 20.01; O, 18.28; S, 6.11 | |
Compared with numerous common neuropeptide compounds that trigger rapid, sharp physiological fluctuations after binding to target receptors, vasopressin presents far milder and more refined regulatory properties in biological systems. Unlike fast-acting neuropeptides that bring instant obvious physiological alterations, vasopressin hardly generates abrupt, drastic functional changes in a short time frame. Instead, it persistently participates in long-term, fine-granular physiological modulation across multiple organ systems, steadily calibrating related signal transduction pathways to safeguard the regular, orderly execution of diversified core physiological functions inside the organism.
The subsequent discussion concentrates on two crucial research orientations including neurobehavioral regulation and cardiopulmonary-gastrointestinal physiological modulation. By integrating targeted receptor distribution traits, downstream molecular cascade reactions, cellular experimental data and in vivo physiological test details, the article comprehensively unpacks vasopressin's concrete regulatory pathways, functional features and inherent pharmacological mechanisms in respective physiological modules.
Neurobehavioral regulatory effects and multidimensional mediating pathways
This is synthesized from the hypothalamic region and can be directly released into the neural microenvironment of the brain. It acts diffusely on multiple nodes of the central nervous network to achieve precise regulation of various behavioral activities. Its pathway of action is multi-directional and specific, and can be divided into the following aspects:
01.Intervention and regulation of community interaction mode
This peptide substance can affect the recognition, interaction tendency, and collective behavior of individuals of the same kind by regulating synaptic signal transmission in areas such as the limbic system, hippocampus, and brainstem. Research has shown that the dynamic changes in its release can synchronously affect an individual's social approach or avoidance behavior, and participate in the establishment and maintenance of community relationships. This regulation does not directly dominate behavioral output, but optimizes behavioral tendencies by fine-tuning neural excitability.
02.The neural mediated mechanism of sexual drive.
Vasopressin 20 units can act on nuclei related to reproductive behavior in the central nervous system, affecting the intensity of sexual motivation and initiation of reproductive behavior in individuals by regulating the release rhythm of neurotransmitters. This regulation has gender specific differences, and the neural pathways involved in its effects vary slightly among individuals of different genders. However, its core effect is to maintain normal physiological tendencies related to reproductive behavior and provide neural support for population continuity.
03.The consolidation effect of paired connections
During the process of establishing pairing relationships among individuals of the same class, it can enhance synaptic plasticity of related neural pathways, consolidate inter individual associative memory, and reduce the instability of pairing relationships. This effect is not a short-term immediate effect, but rather an important mediator in the formation of individual social attachment by regulating the transmission efficiency of neural signals over the long term, achieving sustained maintenance of paired connections.
03.Peptide regulation of maternal stress response
During late pregnancy and lactation, the level of it released by the hypothalamus will significantly increase. It can help the mother adapt to postpartum physiological and behavioral changes by regulating central stress-related neural pathways, alleviate the interference of stress reactions on maternal behavior, and provide neural regulatory support for the normal development of maternal behaviors such as protecting the baby and breastfeeding, reducing the negative impact of stress on maternal infant connection.
Collectively, centrally secreted vasopressin executes multi-faceted neuroregulatory functions via targeted binding to discrete brain regions and distinct neural signaling routes. It shapes intraspecies social dynamics by tuning limbic and hippocampal synaptic activity to govern social interaction preferences; modulates gender-divergent reproductive drive through controlling neurotransmitter secretion within reproductive-associated brain nuclei; stabilizes long-term monogamous pairing bonds by boosting synaptic plasticity to solidify associative social memory; and surges during late gestation and lactation to buffer maternal central stress, safeguarding nurturing behaviors and intact mother-infant bonding.
Peptide regulatory effects on cardiovascular and gastrointestinal physiological functions
Vasopropressin's regulation of the heart and gastrointestinal system mainly focuses on maintaining cellular homeostasis and regulating smooth muscle activity. By targeting specific cell populations, it achieves precise regulation of heart gastrointestinal function.
Maintenance and differentiation induction of myocardial cell homeostasis
This peptide substance can specifically act on cardiac precursor cells by activating intracellular regulatory pathways, inducing their directed differentiation into mature cardiac cells, and supplementing the renewal and repair of the cardiac cell pool. At the same time, it can regulate signal transduction within myocardial cells, inhibit abnormal apoptosis, maintain normal physiological activity of myocardial cells, ensure the structural integrity and functional stability of myocardial tissue, and avoid functional abnormalities caused by myocardial homeostasis imbalance.
The promoting effect of gastrointestinal smooth muscle contraction and peristalsis
Vasopressin 20 units can act on smooth muscle cells in the gastrointestinal wall, by regulating changes in intracellular calcium ion concentration, enhancing the contraction strength and rhythmicity of smooth muscles, and thereby promoting the advancement and emptying of gastrointestinal contents. This regulation is site-specific and has a more significant promoting effect on smooth muscle contraction in the colon and other parts. It can optimize the rhythm of gastrointestinal peristalsis by coordinating the synergistic effect of smooth muscle and intestinal wall nerves, ensuring the orderly development of digestion and absorption processes, and avoiding digestive dysfunction caused by slow gastrointestinal peristalsis.
Therefore, a standard clinical dosage of asopressin 20 units functions as a vital endogenous signaling mediator bridging central nervous activity and peripheral somatic metabolism, occupying an indispensable core status in subtle physiological modulation of neurobehavioral activities as well as sustained homeostasis of cardiovascular and gastrointestinal visceral functions. Its in-vivo pharmacological modulation never depends on isolated single signaling cascade. Instead, vasopressin exerts precise biological intervention via multi-targeted.
Multi-dimensional synergistic pathways covering diversified neurobehavioral domains: ranging from modulating individual social interaction preference and regulating neurochemical transmission underlying sexual arousal, facilitating the consolidation of conditioned associative memory circuits, to mitigating excessive physiological fluctuation triggered by maternal psychological stress. Parallel to neuroregulatory effects, this polypeptide hormone concurrently participates in myocardial cell differentiation induction and long-term cardiomyocyte homeostasis preservation.Furthermore, vasopressin binds to specific vasopressin receptor subtypes distributed on gastrointestinal smooth muscle cell membranes to modulate contractile amplitude.
Adjust muscular tension and calibrate the rhythmic frequency of intestinal peristalsis, thereby improving uncoordinated bowel movement and maintaining normal digestive tract motility.By synchronizing multi-target biological effects across the central nervous system, cardiac tissue and digestive organs via distinct receptor-mediated signaling cascades, vasopressin carries out systematic multi-organ synergistic regulation. This layered regulatory pattern enables the hormone to achieve comprehensive and finely calibrated control covering multiple physiological dimensions: orderly neurobehavioral output, long-term cardiomyocyte structural and functional stability, as well as the steady physiological operation of gastrointestinal peristalsis.
References
Interplay of Angiotensin Peptides, Vasopressin, and Insulin in the Heart: Experimental and Clinical Evidence of Altered Interactions in Obesity and Diabetes Mellitus, Int J Mol Sci, 2024, 25:1310
Oxytocin and vasopressin neural networks: implications for social behavioral diversity and translational neuroscience, Neurosci Biobehav Rev, 2017, 76(pt A):87-98
Vasopressin injection, DailyMed, 2025
Science Review: Vasopressin and the cardiovascular system part 2 – clinical physiology(https://pmc.ncbi.nlm.nih.gov/articles/PMC420051/)
Effects of trifluoperazine on function and structure of toad urinary bladder. Role of calmodulin vasopressin-stimulation of water permeability.(https://pmc.ncbi.nlm.nih.gov/articles/PMC370615/)
FAQ
- What is a vesopressin injection used for?
Vasopressin injection serves as an important vasoactive prescription preparation for blood pressure rescue in adult patients diagnosed with vasodilatory shock, covering common clinical subtypes such as postoperative hypotension following cardiac surgery and sepsis-induced distributive shock. These patients typically fail to achieve stable blood pressure recovery after conventional standardized interventions including sufficient intravenous fluid resuscitation and routine first-line vasopressor medications, hence requiring supplementary vasopressin for hemodynamic support. Endogenously, vasopressin is an essential polypeptide hormone naturally synthesized within the hypothalamus and subsequently stored and released from the posterior pituitary gland in the human body. One of its canonical physiological functions targets renal tubular epithelial cells: by binding to specific V2 receptors on nephron tubules, it enhances the reabsorption of free water from primary urine back into systemic circulation, effectively diminishing urine output and optimizing body fluid balance under physiological or stress conditions.
- What is vesopressin used for in ICU?
Concomitant infusion of vesopressin may be used in cases of refractory septic shock to reach or maintain target mean arterial pressure and/or to decrease catecholamine requirements, which may prove particularly beneficial for patients with malignant arrhythmias or increased myocardial demand associated with high.
- Why is vesopressin no longer used?
The removal of vasopressin from the clinical treatment algorithm was grounded on robust clinical trial findings and pooled statistical data. Relevant research verified that combined concurrent administration of epinephrine plus vasopressin fails to deliver extra therapeutic advantages in target treatment outcomes when set against monotherapy using epinephrine alone; no observable improvements in survival rate, hemodynamic recovery or organ perfusion could be confirmed from the dual-drug regimen. To streamline emergency medication workflows, reduce unnecessary drug preparation steps, lower the risk of dosing errors and simplify the standardized clinical resuscitation algorithm for frontline medical staff, vasopressin was ultimately eliminated from the official recommended medication list.
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