BACKGROUND: Subcutaneous specific immunotherapy has been demonstrated capable of inducing T regulatory response. There is few evidence concerning immunological changes induced by sublingual immunotherapy. OBJECTIVE: The aim of this study was to evaluate T cell proliferation in subjects successfully treated with SLIT for HDM. METHODS: PBMCs were isolated from patients after at least 3 years of successful HDM SLIT and from matched untreated allergic and healthy control subjects. After 3 and 6 days of in vitro stimulation with PHA, Candida albicans, Dermatophagoides farinae, grasses, Parietaria judaica, and cat, proliferation. RESULTS: Subjects treated with SLIT showed significant reduction of proliferation induced by Candida albicans, Parietaria, and grasses in comparison with untreated atopics (p=0.0002, 0.0033, and 0.009 respectively). CONCLUSION: This pilot study confirms reduced T cell proliferation in allergic subjects treated with SLIT.
BACKGROUND: Subcutaneous specific immunotherapy has been demonstrated capable of inducing T regulatory response. There is few evidence concerning immunological changes induced by sublingual immunotherapy. OBJECTIVE: The aim of this study was to evaluate T cell proliferation in subjects successfully treated with SLIT for HDM. METHODS: PBMCs were isolated from patients after at least 3 years of successful HDM SLIT and from matched untreated allergic and healthy control subjects. After 3 and 6 days of in vitro stimulation with PHA, Candida albicans, Dermatophagoides farinae, grasses, Parietaria judaica, and cat, proliferation. RESULTS: Subjects treated with SLIT showed significant reduction of proliferation induced by Candida albicans, Parietaria, and grasses in comparison with untreated atopics (p=0.0002, 0.0033, and 0.009 respectively). CONCLUSION: This pilot study confirms reduced T cell proliferation in allergic subjects treated with SLIT.
Authors: G Walter Canonica; Jean Bousquet; Thomas Casale; Richard F Lockey; Carlos E Baena-Cagnani; Ruby Pawankar; Paul C Potter; Philippe J Bousquet; Linda S Cox; Stephen R Durham; Harold S Nelson; Giovanni Passalacqua; Dermot P Ryan; Jan L Brozek; Enrico Compalati; Ronald Dahl; Luis Delgado; Roy Gerth van Wijk; Richard G Gower; Dennis K Ledford; Nelson Rosario Filho; Erkka J Valovirta; Osman M Yusuf; Torsten Zuberbier Journal: World Allergy Organ J Date: 2009-11-19 Impact factor: 4.084