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LL-37 5mg

♢ Research use only Špecifikácia na úrovni triedy; vybrané šarže testuje Janoshik

✓ Janoshik Verified 99.379%LL-37 5mg · Report #233646 ↗

€76.99

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LL-37 je 37-aminokyselinový peptid patriaci do rodiny katelicidínov. Je jediným ľudským katelicidínom a bol rozsiahlo skúmaný pre svoju úlohu v signalizácii vrodenej imunity a vo výskume peptidov obrany hostiteľa. Ľudský katelicidínový peptid obrany hostiteľa Štúdie signalizácie vrodenej imunity a interakcie s membránami Výskum narušenia biofilmu a mikrobiológie Len na výskumné účely. Nie je určené na ľudskú spotrebu.

O produkte LL-37 5mg

LL-37 is the only human cathelicidin — a class of host defense peptides that bridge innate immunity and antimicrobial defense. It is derived from the C-terminus of the hCAP-18 protein (human cathelicidin antimicrobial protein 18), processed by serine proteases into the active 37-amino acid LL-37 form. The name reflects its structure: it begins with two leucine residues (LL) and is 37 amino acids long. Despite being the sole human cathelicidin, it is expressed in neutrophils, epithelial cells of the skin, gut, lung, and urogenital tract — providing frontline defense at multiple barrier sites.

LL-37’s antimicrobial mechanism involves disruption of bacterial membranes. Its amphipathic alpha-helical structure allows it to insert into and permeabilize bacterial lipid bilayers, killing a broad spectrum of gram-positive and gram-negative bacteria, fungi, and enveloped viruses. It also binds and neutralizes bacterial LPS (endotoxin), a mechanism studied in models of endotoxin signalling. Beyond direct killing, LL-37 has extensive immunomodulatory functions — it activates epithelial cells, macrophages, and dendritic cells, modulates TLR signaling, and is studied for fibroblast and angiogenesis responses in tissue-repair model systems.

Research interest spans antimicrobial-peptide biology, tissue-repair model systems, skin-barrier-model and lung host-defense research, anti-biofilm strategies, and oncology research (LL-37 has context-dependent pro- and anti-tumor effects in different cancer models).

Specifications

Parameter Value
Compound LL-37 (human cathelicidin antimicrobial peptide, 37 aa)
Amount per Vial 5mg
Čistota ≥98% (class-level specification); selected lots independently tested by Janoshik, searchable by batch or report code at certapeptides.com/verify
Format Lyophilized powder
Reconstitution Sterile water; avoid high salt concentrations
Skladovanie -20°C; 2-8°C after reconstitution

Skladovanie

Store at -20°C. LL-37 can aggregate in high ionic strength solutions — reconstitute in low-salt buffer or sterile water and then add buffer. Refrigerate at 2-8°C after reconstitution and use within 14 days. Avoid repeated freeze-thaw.

How does LL-37 kill bacteria without killing host cells?

LL-37 kills bacteria by disrupting their membranes through its amphipathic alpha-helical structure — one face of the helix is hydrophobic, the other cationic. Bacterial membranes are negatively charged due to high phosphatidylglycerol and cardiolipin content, attracting the cationic LL-37. Once bound, the peptide inserts into and permeabilizes the bacterial membrane. Mammalian cell membranes are primarily zwitterionic (net neutral) and are less susceptible to this mechanism, though selectivity is concentration-dependent. High LL-37 concentrations can lyse mammalian cells. Research protocols must account for this concentration-dependent selectivity.

Why is LL-37 the only human cathelicidin?

While mice and many other mammals have multiple cathelicidin genes, humans have only one — the CAMP gene encoding the hCAP-18/LL-37 precursor. The reasons for this reduction to a single cathelicidin in human evolution are not fully understood, but it may relate to immune system specialization in humans toward other defense mechanisms. Despite being alone in its class, LL-37 is expressed at many epithelial surfaces and in immune cells, and its immunomodulatory functions extend well beyond direct antimicrobial killing — suggesting it has evolved to serve multiple host defense roles that might be distributed across multiple cathelicidins in other species.

What is LL-37’s role in tissue-repair model research?

LL-37 is studied for tissue-repair responses in model systems through several mechanisms. In cited models it is associated with keratinocyte migration and proliferation, angiogenesis signalling through VEGF and FGF receptor pathways, and modulation of the inflammatory phase of tissue-repair models, alongside anti-biofilm activity studied in antimicrobial-model systems. These properties have made LL-37 of interest in barrier-model and anti-biofilm research. LL-37-functionalised dressings and scaffolds have also been investigated in tissue-repair model systems.

LL-37 is supplied for research purposes only. Not for human use. Handle in compliance with institutional biosafety guidelines.

Čo ukazuje výskum

Vybrané recenzované štúdie z publikovanej literatúry. Každá opisuje laboratórne alebo predklinické zistenia a pripisuje sa citovanej štúdii, nie tomuto produktu. Len na výskumné účely — nie lekárske usmernenie.

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Immunomodulation

In cultured macrophages, LL-37 was shown to inhibit LPS/ATP-induced pyroptosis through a dual mechanism in in-vitro research.

Antimicrobial cathelicidin peptide LL-37 inhibits the LPS/ATP-induced pyroptosis of macrophages by dual mechanism. PLoS One (2014). PMID: 24454930

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Odkiaľ sa odosiela?

Z Rumunska (EÚ). Sme CERTALAB SRL, CUI 54169956, registrovaní pre DPH. Sameday pre Rumunsko, GLS pre väčšinu destinácií v EÚ, TCE Worldwide pre zvyšné cezhraničné EÚ a mimoúnijné trhy (Spojené kráľovstvo, Švajčiarsko). Doručenie 1–15 pracovných dní v závislosti od destinácie — presné okno sa zobrazí v pokladni.

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Máte 14-dňové právo na odstúpenie od zmluvy podľa OUG 34/2014 (rumunské/EÚ spotrebiteľské právo), s možnosťou eskalácie na ANPC a alternatívneho riešenia sporov (SAL). Kontaktujte nás na support@chinapeptideshop.com.

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Informácie o produkte

Tento produkt je určený výhradne na účely vedeckého výskumu a vývoja. Ide o chemickú látku, ktorá sa nesmie používať ako liek, liečivo, účinná látka ani zložka akéhokoľvek produktu určeného na ľudskú alebo zvieraciu konzumáciu. Výskumníci musia s touto zlúčeninou manipulovať v súlade so svojimi inštitucionálnymi zásadami biologickej bezpečnosti. Používajte len v riadne vybavených laboratórnych priestoroch s vhodnými osobnými ochrannými prostriedkami.

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LL-37 5mgResearch use only
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