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Abstract Introduction Tinnitus is defined as the perception of sound in the head or in the head in the absence of external sounds. The cause of tinnitus is still unknown. Objective We aimed to compare the serum levels of total oxidant status, total antioxidant status, serum prolidase enzyme activity and the oxidative stress index in patients with tinnitus to those of normal subjects. Methods Twenty five patients with tinnitus (mean age 34.3) and 25 healthy controls (mean age 37.2) were included in the study. Results Total oxidant status levels in the patient group were significantly higher than in the control group (p = 0.037). The mean total oxidant status value was 2.54 ± 0.95 mmoL/L in the patient group, and 2.06 ± 0.98 mmoL/L in the control group. The mean oxidative stress index level was 0.22 ± 0.10 AU in the patient group, while it was 0.17 ± 0.08 AU in the control group. Oxidative stress index was significantly higher in the patient group (0.026). There was no significant difference between the groups in terms of total antioxidant status values (p = 0.838). The mean serum prolidase enzyme activity level was 202.74 ± 33.56 U/L in the patient group and 175.46 ± 42.68 U/L in the control group. Serum prolidase enzyme activity levels in the patient group were significantly higher than in the control group (0.040). Conclusion We detected that the total oxidant status, oxidative stress index and serum prolidase enzyme activity levels were higher in patients with tinnitus when compared to the healthy controls. This finding suggests that oxidative stress index and serum prolidase enzyme activity may play a role in the etiopathogenesis of tinnitus.
Resumo Introdução O zumbido é definido como a percepção de um som na cabeça na ausência de sons externos. A causa do zumbido ainda é desconhecida. Objetivo Comparar os níveis séricos do estado oxidante total, estado antioxidante total, atividade da enzima prolidase sérica e o índice de estresse oxidativo em pacientes com zumbido e em indivíduos normais. Método Foram incluídos no estudo 25 pacientes com zumbido (média de 34,3 anos) e 25 controles saudáveis (média de 37,2 anos). Resultados Os níveis do estado oxidante total no grupo de pacientes foram significantemente maiores do que no grupo controle (p = 0,037). O valor médio do estado oxidante total foi de 2,54 ± 0,95 mmoL/L no grupo de pacientes e de 2,06 ± 0,98 mmoL/L no grupo controle. O nível médio de índice de estresse oxidativo foi de 0,22 ± 0,10 AU no grupo de pacientes, enquanto no grupo controle foi de 0,17 ± 0,08 AU. O índice de estresse oxidativo foi significantemente maior no grupo de pacientes (0,026). Não houve diferença significante entre os grupos em relação aos valores do estado antioxidante total (p = 0,838). O nível médio de atividade da enzima prolidase sérica foi de 202,74 ± 33,56 U/L no grupo de pacientes e de 175,46 ± 42,68 U/L no grupo controle. Os níveis de atividade da enzima prolidase sérica no grupo de pacientes foram significantemente maiores do que no grupo controle (0,040). Conclusão Detectamos que os níveis de estado oxidante total, índice de estresse oxidativo e atividade da enzima prolidase sérica foram maiores nos pacientes com zumbido quando comparados aos controles saudáveis. Esse achado sugere que o índice de estresse oxidativo e a atividade da enzima prolidase sérica podem desempenhar um papel na etiopatogenia do zumbido.
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Humanos , Adulto , Acúfeno , Estrés Oxidativo , Oxidantes , Dipeptidasas , AntioxidantesRESUMEN
INTRODUCTION: Tinnitus is defined as the perception of sound in the head or in the head in the absence of external sounds. The cause of tinnitus is still unknown. OBJECTIVE: We aimed to compare the serum levels of total oxidant status, total antioxidant status, serum prolidase enzyme activity and the oxidative stress index in patients with tinnitus to those of normal subjects. METHODS: Twenty five patients with tinnitus (mean age 34.3) and 25 healthy controls (mean age 37.2) were included in the study. RESULTS: Total oxidant status levels in the patient group were significantly higher than in the control group (p=0.037). The mean total oxidant status value was 2.54±0.95mmoL/L in the patient group, and 2.06±0.98mmoL/L in the control group. The mean oxidative stress index level was 0.22±0.10AU in the patient group, while it was 0.17±0.08AU in the control group. Oxidative stress index was significantly higher in the patient group (0.026). There was no significant difference between the groups in terms of total antioxidant status values (p=0.838). The mean serum prolidase enzyme activity level was 202.74±33.56U/L in the patient group and 175.46±42.68U/L in the control group. Serum prolidase enzyme activity levels in the patient group were significantly higher than in the control group (0.040). CONCLUSION: We detected that the total oxidant status, oxidative stress index and serum prolidase enzyme activity levels were higher in patients with tinnitus when compared to the healthy controls. This finding suggests that oxidative stress index and serum prolidase enzyme activity may play a role in the etiopathogenesis of tinnitus.
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Estrés Oxidativo , Acúfeno , Adulto , Antioxidantes , Dipeptidasas , Humanos , OxidantesRESUMEN
Prolidase deficiency (PD) is a rare genetic disorder caused by mutations in the peptidase D (PEPD) gene, affecting collagen degradation. Features include lower extremity ulcers, facial dysmorphism, frequent respiratory infections, and intellectual disability, though there is significant intra- and interfamilial variability. Twenty-eight mutations have been previously reported, all either small deletions/duplications or point mutations discovered by enzyme or DNA assays. PD has been reported in patients of various ethnic backgrounds, but never in the Mexican-American population. We describe the first Mexican-American patient with PD, who presented with typical facial features, developmental delay, microcephaly, and xerosis. Chromosome microarray analysis (CMA) revealed a homozygous deletion in the region of 19q13.11, estimated to be between 124.79 and 195.72 kb in size, representing the largest PEPD gene deletion reported to date and the first discovered by CMA.
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OBJECTIVES: To investigate the acute effect of phosphodiesterase type 5 (PDE5) inhibitor on erectile dysfunction by evaluating serum oxidative status and prolidase activity. METHODS: Serum samples of 36 patients with erectile dysfunction and 30 control cases were analyzed for total antioxidant status, total oxidant status, and prolidase activity, before and after the administration of tadalafil citrate. RESULTS: Before and after tadalafil citrate administration, serum total antioxidant status, total oxidant status, and prolidase were 1.1+0.0 vs. 1.6 + 0.0 umol H2O2 Eq/L, 10.3+1.1 vs. 6.9 + 1.2 umol H2O2 Eq/L, and 236.4+19.5 vs. 228.2 + 19.2 U/L, respectively (p<0.0001 for all). CONCLUSIONS: Evaluation of serum oxidative status and prolidase activity confirmed the beneficial acute effects of PDE5 inhibitor in patients with erectile dysfunction.