Murat Deniz

University of Gaziantep, Ayıntap, Gaziantep, Turkey

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Publications (6)5.52 Total impact

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    ABSTRACT: OBJECTIVES: Mannose-binding lectin and macrophage migration inhibitory factor gene polymorphisms are associated with several acute/chronic autoimmune or inflammatory diseases. The aim of this study was to investigate if there was any association between mannose-binding lectin 2 (MBL2) and macrophage migration inhibitory factor (MIF) gene polymorphisms and profound congenital sensorineural hearing loss in children who underwent cochlear implantation. METHODS: A total of 62 patients with congenital hearing loss and 80 age- and sex-matched healthy controls were evaluated for codon 54 A/B polymorphisms in MBL2 and the-173 G/C polymorphism in MIF by using the polymerase chain reaction and restriction fragment length polymorphism method. RESULTS: The frequency of the BB genotype of MBL2 and MIF -173 GC genotype were statistically significantly higher in the patient group than in the controls (p=0.0127, p=0.0408, respectively). CONCLUSION: In this study, we found that a subject who is homozygous for the variant allele B of codon 54 of the MBL2and heterozygous for variant allele C of -173 MIF has a risk factor for sensorineural hearing loss.
    International journal of pediatric otorhinolaryngology 12/2012; · 0.85 Impact Factor
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    ABSTRACT: The aim of this study was to investigate whether there is a significant correlation between intra- and postoperative electrically evoked stapedius reflex thresholds (eSRTs) in children with cochlear implants. Sixty-five pediatric cochlear implant users were included in this study. All patients had congenital prelingual hearing loss. The round window approach was used in all patients. The eSRTs were intraoperatively measured using the 1st, 3rd, 6th and 12th electrodes of the cochlear implant. The measurements taken during the first fitting of the device were taken again one month after surgery. We used paired-sample t-tests to determine the correlation between intra- and postoperative eSRTs. The eSRT analysis revealed a statistically significant difference between the intra- and postoperative thresholds. A correlation analysis did not reveal any correlation between intra- and postoperative eSRTs. Intraoperative eSRT measurements were unable to predict early postoperative eSRTs.
    International journal of pediatric otorhinolaryngology 02/2012; 76(5):649-52. · 0.85 Impact Factor
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    ABSTRACT: BACKGROUNDS AND OBJECTIVE: The hearing assessment of the newborns ideally should detect both middle and inner ear functions. The aim of this study is to control the association between otoscopic evaluation, multifrequency tympanometry and TEOAE results. Fifty new-borns otherwise healthy were tested after the otolaryngological evaluation by 226 and 1000 Hz tympanometries and transient evoked otoacoustic emissions (TEOAE's). The study was performed in three steps and 17 babies that could not pass from the first step they were tested in the second step with the same tests (226 Hz and 1000 Hz tympanometry and TEOAE) The babies that could not pass from the second step were evaluated by multifrequency tympanometries, TEOAE and acoustic brainstem responses (ABR) at the third step. The association between the results obtained from otoscopic evaluation, multifrequency tympanometry and TEOAE were assessed. We found that 1000 Hz tympanometry results were more sensitive and gives more correlated with TEOAE and otoscopic evaluation. Multifrequency tympanometry can detect the middle ear pathologies of the infants sensitively and should be a part of neonatal hearing screening test battery.
    European review for medical and pharmacological sciences 02/2012; 16(2):220-3. · 1.09 Impact Factor
  • Erkan Karatas, Murat Deniz
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    ABSTRACT: We aim to assess the correlation between audiometric data, and psychotic and acoustic measures associated with subjective tinnitus (ST) and to clarify the importance of the psychological process in determining the degree of subjective annoyance and disability due to tinnitus. Fifty-four patients experiencing unilateral ST were allocated for the study. Acoustic assessment of patients including LDL (loudness discomfort levels), MML (minimum masking level) and RI (residual inhibition) was performed. Tinnitus Handicap Inventory (THI), Beck Depression Inventory (BDI) and Visual Analog Scale (VAS) tests were performed for the psychological aspects of subjective annoyance. RI was positive in 23 patients with 13 frequency-matched stimuli at 8,000 Hz. Masking treatment response was successful in 16 RI-positive patients. Mean and standard deviation (SD) of THI scores were 38.77 ± 23.63. Ten patients (%18.51) with tinnitus had ≥ 17 points score, which was significant for BDI. Mean and SD were 5.01 ± 2.31 for VAS-1 scores (severity of tinnitus), 7.98 ± 2.79 for VAS-2 (frequency and duration of tinnitus), 5.77 ± 2.72 for VAS-3 (discomfort level), 3.56 ± 3.30 for VAS-4 (attention deficit) and 3.31 ± 3.31 for VAS-5 (sleep disorders). A significant correlation was found between the tinnitus duration time, age, gender and THI scores (P < 0.05). There were statistically significant correlations between VAS 1, 2, 3 scores and LDL, MML and RI (P > 0.05). RI might be largely frequency dependent and was found as an indicator for the masking treatment response. We did not notice statistically significant correlations between audiometric data and THI and BDI. There were correlations between with VAS and LDL and with MML and RI. VAS was simpler and easier for the assessment of ST. We should consider the psychological aspects of ST and assess it as a symptom separately with acoustic and psychotic tests.
    Archives of Oto-Rhino-Laryngology 06/2011; 269(2):441-7. · 1.29 Impact Factor
  • International Journal of Pediatric Otorhinolaryngology - INT J PED OTORHINOLARYNGOL. 01/2011; 75:3-3.
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    ABSTRACT: To assess the role of serotonin transporter gene (SLC6A4) polymorphism in tinnitus. Fifty-four consecutive patients experiencing subjective tinnitus and 174 healthy controls were allocated for the study. Psychoacoustic parameters of tinnitus were measured. Beck Depression Inventory was used to assess the depression level of the patients. Tinnitus Handicap Inventory was used to assess the severity of tinnitus. A visual analog scale was designed to measure the impact of tinnitus on quality of life of the patients. The 44-bp insertion-deletion in the promoter region (5-HTTLPR) and 17-bp variable number tandem repeats in the second intron of the serotonin transporter gene were assessed. No difference was found between the genotypes and allele frequencies of the patients and controls regarding variable number tandem repeats and 5-HTTLPR polymorphisms (p > 0.05). There was no association between the psychoacoustic parameters of tinnitus and SLC6A4 polymorphism (p > 0.05). There was a significant association between the 5-HTTLPR polymorphism and scores from the visual analog scale of the patients (p < 0.05). Generation of tinnitus signal is not associated with SLC6A4 polymorphism and possibly with serotonergic mechanisms. However, the "ll" genotype variant of the SLC6A4 polymorphic promoter region seems associated with the limbic and autonomic nervous system symptoms of the patients with tinnitus. Therefore, serotonergic mechanisms may help explain the neurophysiological model of tinnitus, and serotonin replacement or serotonin reuptake inhibitors may increase the success rate of tinnitus treatment modalities based on the neurophysiologic model of tinnitus.
    Otology & neurotology: official publication of the American Otological Society, American Neurotology Society [and] European Academy of Otology and Neurotology 01/2010; 31(1):19-24. · 1.44 Impact Factor