The short version of nitric oxide fits in a sentence. The long version — which is the one that helps — is below.
This page was last updated on 2026-05-14 and is reviewed periodically as new material appears.
Doses in the literature are usually expressed in micrograms or nanograms per kilogram of body weight. Investigators have administered the peptide by several routes, including injection and oral delivery, depending on the question asked. Route and dose vary widely across studies, which complicates direct comparison of results. Many papers report effects at low doses, but the absence of a standardized protocol limits generalization. Reporting practice differs between research groups.
Some properties, such as the peptide's sequence and molecular mass, are firmly established. Other claims, particularly about mechanism and clinical benefit, remain open questions. Proposed mechanisms include effects on nitric oxide signaling and on cell migration, but these are hypotheses supported by limited evidence. Reviewers often note that the field lacks large controlled human trials. Positive animal findings are best treated as signals for further study rather than as settled conclusions.
Most published studies examine BPC-157 in animal models rather than in humans. Common subjects include rats and mice, and researchers often use models of tissue injury, surgery, or induced inflammation. Reported endpoints include healing rates, blood vessel formation, and markers of tissue repair. These designs provide controlled comparisons, but findings in animals do not automatically transfer to people. Human clinical data remain limited and are frequently described as preliminary.
BPC-157 is a synthetic pentadecapeptide whose sequence is commonly given as Gly-Glu-Pro-Pro-Pro-Gly-Lys-Pro-Ala-Asp-Asp-Ala-Gly-Leu-Val. It is described in the literature as a fragment of a larger protein found in human gastric juice, referred to as body protection compound. The peptide was first characterized in the early 1990s by a research group in Zagreb, Croatia. Its molecular formula is C62H98N16O22 and its monoisotopic mass is approximately 1419 daltons.
Supplied material is typically a lyophilized white to off-white powder. The peptide is freely soluble in water and in common aqueous buffers, which allows it to be handled as a stock solution. Because the sequence contains no cysteine, disulfide cross-linking is not a route of degradation. The absence of aromatic residues means ultraviolet absorbance at 280 nm is minimal, so quantification usually relies on peptide bond absorbance near 214 nm or on amino acid analysis.
Common synonyms in catalogs include pentadecapeptide BPC 157, BPC157, and the full sequence name. A CAS registry number in the 137525-51-0 range is frequently listed, though the assignment should be verified against the supplier certificate of analysis. The name itself is not a pharmacopoeial designation, and there is no standardized international nonproprietary name. Distinguishing genuine material from related fragments generally requires mass spectrometry, since several truncated sequences share similar chromatographic behavior.
| Property | Value | Notes |
|---|---|---|
| Typical subjects | Rats and mice | Animal models |
| Common routes | Injection and oral | Route varies by study |
| Reported dose range | Microgram to milligram per kg | Not standardized across work |
| Frequent endpoints | Tissue repair, angiogenesis | Marker-dependent |
| Human evidence | Limited | Mostly small or preliminary studies |
Published studies on BPC-157 are dominated by animal models. Commonly used endpoints include healing of surgically induced lesions in the stomach, tendon-to-bone attachment after transection, and recovery from experimentally induced vascular or intestinal damage. Many of these reports come from a small number of research groups, and the peptide is often described as acting across a wide range of tissue types. That breadth is itself a point of discussion, since one molecule influencing many unrelated systems is unusual.
Human data are far more limited than animal data. A small number of clinical reports exist, generally with few participants and without the randomization or blinding expected in later-phase trials. No large, independently replicated human trial has appeared in the indexed peer-reviewed literature. Statements about effects in people therefore rest on extrapolation from animal work rather than on direct evidence, and the strength of that extrapolation remains an open question rather than a settled matter.
Proposed mechanisms include interaction with the nitric oxide system, modulation of growth factor signaling, and effects on blood vessel formation. None of these has been established as the primary mode of action, and some proposed pathways rest on indirect measurements. Whether the reported effects depend on a specific receptor has not been determined. Stability in gastric acid, unusual for a peptide of this size, is also reported in animal work, but the reason for it is not firmly established.
The molecule carries 15 residues, a molar mass near 1419.5 g/mol, and the formula C62H98N16O22. Its structure features a proline-rich central region, a pair of adjacent aspartic acid residues, and no cysteine. The absence of cysteine means no disulfide bonds can form, which simplifies refolding and reconstitution. Suppliers usually ship the material as a freeze-dried powder that appears white to off-white. It dissolves readily in water and in saline solutions.
Published storage guidance follows general peptide practice rather than product-specific studies. The dry powder is typically kept at minus 20 degrees Celsius, away from light and moisture. Once reconstituted, solutions are generally refrigerated and used over days to weeks, because the aqueous environment slowly promotes hydrolysis and oxidation. Long-term data on degradation rates or breakdown products are sparse. Stated shelf lives from different producers vary widely, reflecting the absence of a shared reference standard.
Direct human evidence is scarce. One trial in ulcerative colitis delivered the compound by enema and produced limited publicly reported results without a clear benefit. The compound is not an approved medicine in most jurisdictions. In many markets it is sold as a research chemical; in others it falls under prescription or controlled categories. Regulators have not confirmed any claimed medical use, and product labels rarely undergo premarket review.
Most published reports describe experiments in rodents rather than in people. These studies examine outcomes in tendons, ligaments, bone, stomach lining, and intestinal tissue. In rat and mouse models, a frequently reported effect is faster healing or reduced damage. Sample sizes are usually small, and a substantial share of the work originates from a small number of research groups. Independent replication is limited, so how far the findings extend to humans remains an open question.
Proposed mechanisms in the literature involve the nitric oxide system, vascular endothelial growth factor signaling, and epidermal growth factor receptor pathways. Some studies report changes in blood vessel formation or in inflammatory mediators, while others describe interactions with nervous tissue. Much of this evidence rests on molecular markers in cultured cells or animal models. Whether the same pathways operate the same way in humans has not been established. Authors therefore tend to describe mechanisms as hypothetical rather than settled.
== Eigenschaften == Avacopan ist ein chirales Molekül mit zwei Stereozentren. Es stellt ein weißes bis leicht gelbliches kristallines Pulver dar, das in organischen Lösungsmitteln löslich, in Wasser jedoch praktisch unlöslich ist.
== Therapeutische Verwendung == Avacopan ist angezeigt zur ergänzenden Behandlung von erwachsenen Patienten mit schwerer ANCA-assoziierter Vaskulitis, die in zwei Formen auftritt: der Granulomatose mit Polyangiitis (GPA) und der mikroskopischen Polyangiitis (MPA). Die Behandlung erfolgt in Kombination mit einer Standardtherapie (Rituximab- oder Cyclophosphamid-Schema) einschließlich Glucocorticoide. Eine zusätzliche Gabe von Glucocorticoiden kann nicht vollständig entfallen.
=== Nebenwirkungen und Anwendungsbeschränkungen === Unerwünschten Wirkungen, die gegebenenfalls entsprechende Vorsichtsmaßnahmen erfordern, sind Hepatotoxizität, Überempfindlichkeitsreaktionen, Reaktivierung einer Hepatitis-B-Virus (HBV)-Infektion und schwere Infektionen.
Sources: de.wikipedia.org
=== Klinische Prüfung === Avacopan wurde in einer placebokontrollierten, doppelblinden Phase-3-Studie (ADVOCATE-Studie) an Patienten mit ANCA-assoziierten Vaskulitis (Granulomatose mit Polyangiitis oder mikroskopische Polyangiitis) im Vergleich mit einer Glucocorticoidtherapie klinisch untersucht. 331 Patienten mit ANCA-assoziierter Vaskulitis erhielten entweder zweimal täglich 30 mg Avacopan (n = 166) über 52 Wochen oder nach einem Stufenplan dosiertes Prednison (n = 165). Alle Patienten erhielten ab Woche 15 zusätzlich entweder Cyclophosphamid (gefolgt von Azathioprin) oder Rituximab. Die beiden primären Endpunkte waren erstens die klinische Remission in Woche 26 gemäß einem Birmingham Vasculitis Activity Score (BVAS) von 0 und keine Einnahme von Glucocorticoiden in den vier Wochen vor Woche 26 und zweitens eine anhaltende Remission in Woche 52 und keine Einnahme von Glucocorticoiden in den vier Wochen vor Woche 52. Eine Remission in Woche 26 wurde bei 72,3 % in der Avacopan-Gruppe 70,1 % in der Prednison-Gruppe erreicht. Eine anhaltende Remission in Woche 52 wurde bei 65,7 % der Patienten unter Avacopan und bei 54,9 % der Patienten unter Prednison beobachtet. Nach erreichter Remission (BVAS =0) war die Zeit bis zu einem Rezidiv unter Avacopan signifikant länger als unter Prednison. Schwerwiegende unerwünschte Ereignisse traten bei 37,3 % der Patienten unter Avacopan und bei 39,0 % der Patienten unter Prednison auf.
Sources: de.wikipedia.org
Human data are limited. Most evidence comes from animal experiments and from small or uncontrolled reports. The absence of large trials means clinical effects and safety are not firmly established.
Frequently measured outcomes include wound healing, blood vessel growth, and tissue repair markers. Some work examines gastrointestinal protection. The choice of endpoint depends on the model used.
Different routes of administration and different animal models require different amounts. Studies also use varied timelines and measurement methods. This variation makes it difficult to combine results into a single standardized figure.
It is a synthetic peptide built from fifteen amino acids, with a mass of roughly 1419 daltons. The sequence is reported to match a fragment of a protein present in human gastric juice. It is not a naturally circulating hormone.