• Ayse E Göker, Maide H Alagöz, Tolgar L Kumral, Semih Karaketir, Ayça B Yilmazer, Belgin Tutar, Esmail A Ahmed, Cemile Biçer, and Yavuz Uyar.
• Otorhinolaryngology Department, Okmeydani Training and Research Hospital, Istanbul, Turkey.
• Ear Nose Throat J. 2020 Jul 20: 145561320926336.

BackgroundWe evaluated the efficacy of medical treatment on thiol-disulfide balance despite ongoing allergic stimulation.MethodsThe research design was a prospective observational study that included 35 persistent allergic rhinitis (AR) patients. All patients who were diagnosed with persistent AR were included. A skin prick test was applied to all patients, and the Sino-nasal Outcome Test-22 was used to evaluate sinonasal symptoms. Thiol/disulfide homeostasis balance parameters were measured using a novel automatic and spectrophotometric method and compared statistically. Serum total thiol (TT), native thiol (SH), disulphide (SS), disulphide/native thiol (SS/SH), disulphide/total thiol (SS/TT), and native thiol/total thiol (SH/TT) ratios were measured after the second month of the treatment.ResultsThe 35 patients included 20 (58%) females and 15 (42%) males. The mean age of the patients was 33.17 ± 9.9 years. Disulphide, SS/SH, and SS/TT ratios decreased significantly after the treatment (P < .05), while SH and SH/TT increased significantly (P < .05). The mean SH measurement increased significantly in the second month (P = .001), but TT mean measurements showed no difference after the treatment (P = .058). The mean SS measurements, on the other hand, decreased significantly in the second month (P = .003).ConclusionThiol/disulfide homeostasis may be used as a marker to evaluate the efficacy of persistent AR treatments. After the treatment, the increase in SH levels suggested the decrease in oxidative stress, even though allergen exposure continued.

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