PMID- 11705956 OWN - NLM STAT- MEDLINE DCOM- 20011212 LR - 20181113 IS - 0019-9567 (Print) IS - 1098-5522 (Electronic) IS - 0019-9567 (Linking) VI - 69 IP - 12 DP - 2001 Dec TI - Interleukin-4 receptor-Stat6 signaling in murine infections with a tissue-dwelling nematode parasite. PG - 7743-52 AB - Interleukin-4 (IL-4) has been shown to be crucial in parasite expulsion in several gastrointestinal nematode infection models. Data from both epidemiological studies with humans and experimental infections in animals imply a critical role for the type II helper response, dominated by IL-4, in host protection. Here we utilized inbred mice on two distinct backgrounds to document the involvement of IL-4 in the clearance of a primary infection of Brugia from the murine host. Our data from infections of IL-4 receptor(-/-) and Stat6(-/-) mice further indicate that IL-4 exerts its effects by activating the Stat6 molecule in host target cells, a finding which links clearance requirements of a gastrointestinal tract-dwelling nematode with those of a tissue-dwelling nematode. Additionally, we show that the requirements for IL-4 receptor binding and Stat6 activation extend to accelerated clearance of a secondary infection as well. The data shown here, including analysis of cell populations at the site of infection and infection of immunoglobulin E (IgE)(-/-) mice, lead us to suggest that deficiencies in eosinophil recruitment and isotype switching to IgE production may be at least partially responsible for slower parasite clearance in the absence of IL-4. FAU - Spencer, L AU - Spencer L AD - Department of Pathology, University of Connecticut Health Center, Farmington 06030-3105, USA. FAU - Shultz, L AU - Shultz L FAU - Rajan, T V AU - Rajan TV LA - eng GR - AI 39705/AI/NIAID NIH HHS/United States GR - AI 42362/AI/NIAID NIH HHS/United States PT - Journal Article PT - Research Support, U.S. Gov't, P.H.S. PL - United States TA - Infect Immun JT - Infection and immunity JID - 0246127 RN - 0 (Receptors, Interleukin-4) RN - 0 (STAT6 Transcription Factor) RN - 0 (Stat6 protein, mouse) RN - 0 (Trans-Activators) RN - 207137-56-2 (Interleukin-4) RN - 37341-29-0 (Immunoglobulin E) SB - IM MH - Animals MH - *Brugia malayi MH - Eosinophils/immunology MH - Filariasis/*immunology MH - Host-Parasite Interactions MH - Immunity, Innate MH - Immunoglobulin Class Switching MH - Immunoglobulin E/biosynthesis MH - Interleukin-4/*pharmacology MH - Mice MH - Mice, Inbred BALB C MH - Mice, Inbred C57BL MH - Mice, Mutant Strains MH - Mice, SCID MH - Peritoneal Cavity/parasitology MH - Receptors, Interleukin-4/genetics/*metabolism MH - STAT6 Transcription Factor MH - Signal Transduction MH - Th2 Cells MH - Trans-Activators/genetics/*metabolism PMC - PMC98870 EDAT- 2001/11/14 10:00 MHDA- 2002/01/05 10:01 PMCR- 2001/12/01 CRDT- 2001/11/14 10:00 PHST- 2001/11/14 10:00 [pubmed] PHST- 2002/01/05 10:01 [medline] PHST- 2001/11/14 10:00 [entrez] PHST- 2001/12/01 00:00 [pmc-release] AID - 0633 [pii] AID - 10.1128/IAI.69.12.7743-7752.2001 [doi] PST - ppublish SO - Infect Immun. 2001 Dec;69(12):7743-52. doi: 10.1128/IAI.69.12.7743-7752.2001.