Malondialdehyde level and adenosine deaminase activity in adenoid tissue of patients with OME and obstructive adenoid hypertrophy

The Role of Oxidants and Antioxidants in Chronic Tonsillitis

The aim of the study was to determine the possible role of oxidants and antioxidants in chronic tonsillitis in paediatric age group and also to know the outcome of tonsillectomy on the oxidative stress 60 patients (30 tests, 30 controls) in the age group 3-14 years were recruited in the study. Total antioxidant capacity, superoxide dismutase (antioxidants), Malondialdehyde (oxidant) was measured from the venous blood sample. In the study group, i.e. group with chronic tonsillitis who were to undergo tonsillectomy, these levels were measured twice, preoperatively and 1 month after surgery. In the control group the parameters were measured only once. The results were compared statistically. Malondialdehyde levels (oxidant) levels in blood were siginificantly high in patients with chronic tonsillitis which reduced post tonsillectomy but did not normalise in 1 month after tonsillectomy. Total antioxidant capacity and superoxide dismutase levels (antioxidants) in blood were significantly low in patients with chronic tonsillitis which improved post tonsillectomy but did not normalize 1 month post-surgery. The study showed that oxidants and antioxidants have a role in chronic tonsillitis.Children with chronic tonsillitis are under significant oxidative stress. Reduction in oxidative stress post tonsillectomy suggested that the surgery was helpful in this respect.

Hypoxia induced factor-1α levels in patients undergoing adenoidectomy

Among  the most common causes of nasal congestion in childhood is adenoid hypertrophy (AH) which leads to hypoxia. In this study, we studied plasma concentrations of hypoxia induced factor-1α (HIF-1α) in children undergoing adenoidectomy. The study included a total of 86 participants: 39 patients with AH and 47 healthy individuals. Serum HIF-1α levels (ng/mL) were measured by ELISA. HIF-1α concentrations were compared to the adenoid-nasopharyngeal ratio (ANR) of patients with AH, as recorded in the medical records. We found significantly higher concentrations of HIF-1α (0.30 ± 0.47 ng/mL) in patients with AH as compared to healthy controls (0.24 ± 0.07 ng/mL, p = .011). HIF-1α levels were not significantly different regarding gender between patients with AH (p = .77) and in the control group (p = .97). In patients with AH, there was a moderately significant positive correlation between HIF-1α levels and Hb (p = .000), (correlation coefficient r = 0.542). There was a positive correlation between HIF-1α and ANR in patients with AH (p = .005, r = 0.439). This study indicates that AH increases HIF-1α levels. We also observed a moderately significant positive correlation between HIF-1α and ANR in patients with AH. HIF-1α levels are a potential biomarker for hypoxia in patients with AH.

A novel method for evaluation of oxidative stress in children with OSA

OBJECTIVES

To evaluate the role of adenotonsillar hypertrophy and the outcomes of adenotonsillectomy (AT) on oxidative stress for obstructive sleep apnea (OSA) in children using a new method; thiol/disulfide homeostasis.

METHODS

The study is consisted of 45 children with OSA and 38 healthy control subjects with similar age and sex. Children 3-12 years of age with OSA, defined as having an apnea/hypopnea index (AHI) of 5 or more in an overnight polysomnography, underwent adenotonsillectomy. OSA was classified as mild (1 ≤ AHI<10), moderate (10 ≤ AHI<20) or severe (AHI≥20). Venous blood samples were taken preoperatively and one month after surgery. The blood levels of thiol/disulfide homeostasis were assessed and compared between patients and control group, before and after adenotonsillectomy.

RESULTS

Body mass index (BMI), mean age and gender distribution were similar between the study and control groups. Statistically significant higher disulfide levels and ratios were found in the study group compared to the control group; in patients with moderate to severe OSA compared to mild OSA; in the preoperative period compared to postoperative period (p < 0.001, for all).

CONCLUSIONS

The current study provides preliminary evidence between oxidative stress and OSA in children with adenotonsillar. Adenotonsillectomy for OSA may result in a dramatic improvement in oxidative stress as measured by thiol/disulfide homeostasis.

Light microscopic histopathology of adenoid tissue in otitis media with effusion: is there any relation?

OBJECTIVE

The adenoid has long been recognized as an important factor in the pathogenesis of otitis media with effusion. The aim of this study was to determine if there is any relationship between light microscopic histopathologic parameters of adenoid tissue and otitis media with effusion.

METHODS

The study group consists of 30 children aged from 2 to 8 years old with bilateral otitis media with effusion who were selected also for adenoidectomy due to obstructive symptoms of hypertrophied adenoid. The control group included 30 age-matched patients who undergone adenoidectomy due to same indications but without even unilateral otitis media with effusion. Adenoid specimens were examined under light microscopy by an expert pathologist who not aware of the specimens were belongs to which group. Nine histopathologic parameters of the specimens were compared between the two groups.

RESULTS

There was no statistically significant difference between these groups (p values>0.05).

CONCLUSIONS

The role of the adenoids in pathogenesis of otitis media with effusion is beyond its histopathologic changes at least in the level of light microscopic findings.