title: Inhibition of IL-32 and TSLP production through the attenuation of caspase-1 activation in an animal model of allergic rhinitis by Naju Jjok (Polygonum tinctorium).
abstract: In this study, we investigated the effects of Naju Jjok (Polygonum tinctorium Lour., NJJ) on interleukin (IL)-32 and thymic stromal lymphopoietin (TSLP) levels associated with allergic rhinitis (AR). Using female BALB/c mice, we created an animal model of ovalbumin (OVA)-induced AR. Prior to the callenge with OVA, the mice were administered, either nasally or orally with NJJ. In addition, we also used the eosinophilic cells line, Eol-1, stimulated with granulocyte‑macrophage colony-stimulation factor (GM-CSF). The mRNA and protein levels of inflammatory cytokines and markers [interleukin (IL)-32, IL-4, macrophage-inflammatory protein-2 (MIP-2), intercellular adhesion molecule-1 (ICAM-1), and cyclooxygenase-2 (COX-2)] were measured by RT-PCR and western blot analysis, respectively and serum levels were measured by ELISA. The increased levels of IL-32 in the mice with AR and in the stimulated eosinophilic cell line, Eol-1, were significantly reduced by NJJ. TSLP levels were also decreased following the oral administration of NJJ. Mice orally administered NJJ showed markedly alleviated clinical symptoms, such as a reduced number of nasal rubs, decreased spleen weight, decreased serum immunoglobulin E (IgE) levels and decreased serum histamine levels. The oral administration of NJJ significantly decreased the IL-4 levels, while increasing the interferon-γ levels in the spleen. The increased number of eosinophils and mast cells infiltrating the nasal mucosal tissue of the mice with AR were decreased following the oral administration of NJJ. NJJ effectively attenuated caspase-1 activity in the mice with AR and in the stimulated Eol-1 cells. The oral administration of NJJ significantly reduced the levels of inflammatory markers, such as MIP-2, ICAM-1 and COX-2. Furthermore, the intranasal administration of NJJ significantly reduced the early phase response to allergen exposure, such as nasal rubs, IgE production and histamine release, as well as the late phase responses, such as the expression of inflammatory markers. In conclusion, these data demonstrate that NJJ may play a regulatory role in nasal inflammation.
authors.affiliation: Biochip Research Center and Inflammatory Diseases Research Center, Hoseo University, Asan, Chungnam 336-795, Republic of Korea.
authors.forename: Hyun-Ja
authors.initials: HJ
authors.lastname: Jeong
authors.forename: Hyun-A
authors.initials: HA
authors.lastname: Oh
authors.forename: Byung-Joo
authors.initials: BJ
authors.lastname: Lee
authors.forename: Hyung-Min
authors.initials: HM
authors.lastname: Kim
mesh_terms: D000284:Administration, Oral; D000818:Animals; D020170:Caspase 1 / Q000235:genetics / Q000378:metabolism*; D002460:Cell Line; D054426:Chemokine CXCL2 / Q000235:genetics / Q000378:metabolism; D051546:Cyclooxygenase 2 / Q000235:genetics / Q000378:metabolism; D016207:Cytokines / Q000378:metabolism*; D004195:Disease Models, Animal; D004804:Eosinophils / Q000187:drug effects / Q000378:metabolism; D005260:Female; D006632:Histamine / Q000097:blood; D006801:Humans; D007073:Immunoglobulin E / Q000097:blood; D018799:Intercellular Adhesion Molecule-1 / Q000235:genetics / Q000378:metabolism; D007371:Interferon-gamma / Q000378:metabolism; D007378:Interleukins / Q000235:genetics / Q000378:metabolism*; D008407:Mast Cells / Q000187:drug effects / Q000378:metabolism; D051379:Mice; D008807:Mice, Inbred BALB C; D010047:Ovalbumin / Q000009:adverse effects; D010936:Plant Extracts / Q000737:chemistry / Q000494:pharmacology*; D028502:Polygonum / Q000737:chemistry*; D065631:Rhinitis, Allergic; D012221:Rhinitis, Allergic, Perennial / Q000188:drug therapy*; D013154:Spleen / Q000187:drug effects / Q000378:metabolism; D000094632:Thymic Stromal Lymphopoietin
chemical_list: D054426:Chemokine CXCL2; C404915:Cxcl2 protein, mouse; D016207:Cytokines; C090509:Icam1 protein, mouse; D007378:Interleukins; D010936:Plant Extracts; C569037:interleukin-32, mouse; D018799:Intercellular Adhesion Molecule-1; D007073:Immunoglobulin E; D006632:Histamine; D007371:Interferon-gamma; D010047:Ovalbumin; C077623:Ptgs2 protein, mouse; D051546:Cyclooxygenase 2; D020170:Caspase 1; D000094632:Thymic Stromal Lymphopoietin