pbo-5 Antibody

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Description

Definition of PBO in Clinical Trials

PBO universally denotes placebo in clinical research, serving as a control arm to evaluate the efficacy and safety of investigational drugs, including monoclonal antibodies . For example:

  • In a Phase 2a trial for Sjögren’s syndrome, MEDI5872 (an anti-ICOS ligand antibody) was compared to PBO, with PBO patients showing no significant reduction in rheumatoid factor levels .

  • A Phase 3 study of pegloticase + methotrexate (MTX) versus pegloticase + PBO demonstrated a 29.1% higher response rate in the MTX group .

Potential Misinterpretation of "pbo-5"

The suffix "-5" may refer to:

  • Study cohorts: Some trials label treatment arms numerically (e.g., PBO-1, PBO-2) to distinguish dosage groups .

  • Trial identifiers: Protocol numbers or internal codes (e.g., NCT02334306 for MEDI5872 , NCT04968912 for nipocalimab ).

Antibody Mechanisms and Clinical Outcomes

While "pbo-5 Antibody" remains unidentified, recent studies highlight antibodies targeting specific pathways:

AntibodyTargetClinical Outcome (vs. PBO)Source
MEDI5872ICOS ligandReduced CD4+/ICOS Tfh-like cells (P=0.008)
NipocalimabFcRnImproved clinESSDAI scores (P=0.002)
DazodalibepCD40/CD40 ligandSignificant ESSDAI reduction (P<0.05)

Product Specs

Buffer
Preservative: 0.03% Proclin 300
Constituents: 50% Glycerol, 0.01M PBS, pH 7.4
Form
Liquid
Lead Time
Made-to-order (14-16 weeks)
Synonyms
pbo-5 antibody; lgc-2 antibody; Y44A6E.1 antibody; Proton-gated ion channel subunit pbo-5 antibody; PBoc defective protein pbo-5 antibody
Target Names
pbo-5
Uniprot No.

Target Background

Function
pbo-5 Antibody forms a proton-gated ion channel with pbo-6. This channel is activated by acidification of the posterior coelomic space, leading to posterior body wall muscle contraction (pBoc) during the defecation cycle. This process is likely involved in regulating the defecation motor program, which is essential for fatty acid uptake by intestinal cells. Importantly, pbo-5 Antibody does not bind to neurotransmitters such as acetylcholine, gamma-aminobutyric acid, glycine, serotonin, glutamate, or choline.
Database Links

KEGG: cel:CELE_Y44A6E.1

STRING: 6239.Y44A6E.1b

UniGene: Cel.8340

Protein Families
Ligand-gated ion channel (TC 1.A.9) family, Acetylcholine receptor (TC 1.A.9.1) subfamily
Subcellular Location
Membrane; Multi-pass membrane protein.
Tissue Specificity
Expressed in the posterior body muscles. Also detected in the RIFL, RIFR and RIS head neurons.

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