Active Complement Component 3a (C3a)

ACTIVITY TEST

Complement Component 3a (C3a) is a component of the complement system, this protein is also known as the C3a anaphylatoxin, modulates inflammation and possesses antimicrobial activity. It's been identified that C3A can interact with Complement Factor I (CFI), thus a functional binding ELISA assay was conducted to detect the interaction of recombinant human C3a and recombinant human CFI. Briefly, C3a was diluted serially in PBS with 0.01% BSA (pH 7.4). Duplicate samples of 100 μl were then transferred to CFI-coated microtiter wells and incubated for 1h at 37℃. Wells were washed with PBST and incubated for 1h with anti-C3a pAb, then aspirated and washed 3 times. After incubation with HRP labelled secondary antibody for 1h at 37℃, wells were aspirated and washed 5 times. With the addition of substrate solution, wells were incubated 15-25 minutes at 37℃. Finally, add 50 µL stop solution to the wells and read at 450/630 nm immediately. The binding activity of recombinant human C3a and recombinant human CFI was shown in Figure 1, the EC50 for this effect is 0.03 ug/mL.

USAGE

Reconstitute in 10mM PBS (pH7.4) to a concentration of 0.1-1.0 mg/mL. Do not vortex.

STORAGE

Avoid repeated freeze/thaw cycles. Store at 2-8°C for one month. Aliquot and store at -80°C for 12 months.

STABILITY

The thermal stability is described by the loss rate. The loss rate was determined by accelerated thermal degradation test, that is, incubate the protein at 37°C for 48h, and no obvious degradation and precipitation were observed. The loss rate is less than 5% within the expiration date under appropriate storage condition.

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Magazine Citations
22 Immobilization of soluble complement receptor 1 on islets. ScienceDirect: S0142961211002596
Journal of Reproductive Immunology Elevated complement factor C5a in maternal and umbilical cord plasma in preeclampsia PubMed: 23415845
Journal of Antimicrobial Chemotherapy Efficacy of a synthetic antimicrobial peptidomimetic versus vancomycin in a Staphylococcus epidermidis device-related murine peritonitis model Pubmed: 23645587
SpringerPlus Therapeutic effects of sesame oil on monosodium urate crystal-induced acute inflammatory response in rats Pubmed: 24353977
Gynecol Obstet Invest Complement Split Products C3a/C5a and Receptors: Are They Regulated by Circulating Angiotensin II Type 1 Receptor Autoantibody in Severe Preeclampsia? PubMed: 26485247
Am J Reprod Immunol Human IgG Antinuclear Antibodies Induce Pregnancy Loss in Mice by Increasing Immune Complex Deposition in Placental Tissue: In Vivo Study PubMed: 26388133
Journal of Neuroimmunology Acute and prolonged complement activation in the central nervous system during herpes simplex encephalitis Pubmed:27235358
Plos One Alternative Pathway Inhibition by Exogenous Factor H Fails to Attenuate Inflammation and Vascular Leakage in Experimental Pneumococcal Sepsis in Mice Pubmed:26872035
Digital Repository Dosagem de frações ativadas do sistema complemento em empiema induzido em ratos 10183
Colloids Surf B Biointerfaces. Interaction of gold and silver nanoparticles with human plasma: Analysis of protein corona reveals specific binding patterns. pubmed:28131092
Pediatric Pulmonology Accuracy of complement activation product levels to detect infected pleural effusion in rats pubmed:28474458
Journal of Immunology The Complement C3a–C3aR Axis Promotes Development of Thoracic Aortic Dissection via Regulation of MMP2 Expression Pubmed:29367209
Artificial Cells Nanomedicine and Biotechnology Journal Long term safety and immunological effects of a nanobiotherapeutic, bovine poly-[hemoglobin-catalase-superoxide dismutase-carbonic anhydrase], after four weekly … Pubmed:29873524
Cytotherapy Mesenchymal stromal cell secretory factors induce sustained improvements in islet function pre-and post-transplantation Doi: 10.1016/j.jcyt.2018.07.007
Journal of NeuroVirology Intrathecal complement activation by the classical pathway in tick-borne encephalitis Pubmed: 30850976
Clinical Immunology Pathogenic roles of anti-C1q antibodies in recurrent pregnancy loss
Materials Science and Engineering: C Hemocompatibility of biodegradable Zn-0.8 wt%(Cu, Mn, Li) alloys
Nanomedicine Complement-mediated hypersensitivity reactions to an amphotericin B-containing lipid complex (Abelcet) in pediatric patients and anesthetized rats: Benefits of slow infusion 33549818
EXPERIMENTAL EYE RESEARCH Increased ratios of complement factors C3a to C3 in aqueous humor and serum mark glaucoma progression 33493474
FASEB J C‐reactive protein inhibits C3a/C3aR‐dependent podocyte autophagy in favor of diabetic kidney disease Pubmed:35503088
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