# Inhibition of antibody production in vivo by pre-stimulation of toll-like receptor 4 before antigen priming is caused by defective B-cell priming and not impairment in antigen presentation
> Rachmawati N.M.

URL kanonis: https://discover.unhas.ac.id/publications/pub_scopus_84873802103
Jurnal / Konferensi: International Immunology
Tahun terbit: 2013
DOI: https://doi.org/10.1093/intimm/dxs096
ISSN: 09538178
Kuartil SJR: Q1
Citations: 7

## Authors
- Rachmawati N.M.

## Abstract
Stimulation of Toll-like receptor 4 (TLR4) induces not only innate but also adaptive immune responses, and has been suggested to exert adjuvant effects. Additional to such positive effects, pre-stimulation of TLR4 induces endotoxin tolerance where animals are unresponsive to subsequent lethal challenges with lipopolysaccharide (LPS). We examined the effects of pre-stimulation of TLR4 using an agonistic anti-TLR4 mAb (UT12) on antibody production in vivo. Pre-injection of UT12 prior to both primary and secondary immunization completely inhibited antigen-specific antibody responses. Cellular analysis revealed that the inhibition was not due to impairment of T-cell activation. Accordingly, T-helper activities in UT12 pre-injected mice were not impaired. In contrast, B-cell priming was defective in UT12 pre-injected mice. The observation that the expression of activation markers such as CD69 and CD86 on B cells was blocked by UT12 pre-injection supports this. Interestingly, UT12 pre-injection only showed inhibitory effects at the primary and not the secondary immunization. These results provide important information concerning the regulatory mechanisms of antibody production, especially in endotoxin-tolerant states.

## Keywords
- Priming (agriculture)
- TLR4
- Antigen
- Stimulation
- Immunology
- CD86
- In vivo
- Immune system
- Antibody
- Lipopolysaccharide
- Toll-like receptor
- T cell
- Adjuvant
- Biology
- Receptor
- Immune tolerance
- Innate immune system
- Endocrinology
- Biochemistry
- Germination
- Botany
- Biotechnology

---
Sumber: Discover Unhas — RIMS Universitas Hasanuddin.
Saat mengutip, gunakan DOI bila tersedia atau URL kanonis di atas.