Browsing by Author "Kumsar, Sukru"

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    Effects of Sacral Neuromodulation on Isolated Urinary Bladder Function in a Rat Model of Spinal Cord Injury
    (2015) Kumsar, Sukru; Keskin, Ulya; Akay, Alaaddin; Bilgilisoy, Ugur Taylan; Erdem, S. Remzi; Peskircioglu, C. Levent; Ozkardes, Hakan; 0000-0002-7277-449X; 24917133; AAH-1052-2020
    IntroductionSacral neuromodulation has been considered as an effective treatment option for various types of chronic voiding dysfunction, but the mechanism of action has not been well understood. The aim of this study was to evaluate the effect of chronic sacral neuromodulation on isolated bladder functions in a rat model of spinal cord injury. Materials and MethodsFemale Sprague-Dawley rats (250-300g; N = 20) were assigned to four groups as follows: 1) control group (N = 6); 2) spinal cord transection group (SCT; N = 5); 3) spinal cord transection + sacral neuromodulation group (SCT + SNM; N = 5); 4) sham (spinal cord transection + electrode wire implantation without sacral neuromodulation; N = 4). The rats in the SCT, SCT + SNM, and sham groups were anesthetized with ketamine (60mg/kg, i.p.) and xylazine (7mg/kg, i.p.). The spinal cord was completely transected at T8-T9 level in SCT and SCT + SNM groups. Electrode wires were implanted into S3 dorsal foramina in both sham and SNM groups, but only the SNM group was subjected to electrical stimulation for four hours a day for three weeks. Twenty-one days later, the rats were sacrificed via anesthetic overdose, and isolated longitudinal bladder strip preparations were placed in organ baths for the investigation of their isometric responses to pharmacological agents. ResultsIn isometric contraction experiments, SCT was found to increase the contraction responses of the bladder strips to muscarinic stimulation, and SNM could not prevent this increase. In isometric relaxation experiments, SCT caused a decrease in -adrenergic relaxation responses, and SNM augmented the bladder's -adrenergic relaxation responses. Nitric oxide did not affect the relaxation responses. ConclusionIn our rat model of SCT, SNM seemed to alter adrenergic receptor function in the urinary bladder. Further studies are required to clarify the mechanism of these alterations at the level of bladder receptors following sacral neuromodulation.
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    The relationship between serum irisin levels and erectile dysfunction in diabetic men (irisin and erectile dysfunction in diabetic patients)
    (2021) Kumsar, Sukru; Cigerli, Ozlem; Hasirci, Eray; Akay, Ali F.; Peskircioglu, Levent; https://orcid.org/0000-0003-3700-4104; https://orcid.org/0000-0002-4147-2966; https://orcid.org/0000-0003-0389-9472; 33400308; AAD-5584-2021; AAI-7997-2021; S-4494-2019
    Irisin is an exercise-induced myokine that alleviates endothelial dysfunction and reduces insulin resistance in type 2 diabetes mellitus. We conducted this cross-sectional prospective study to determine the association of serum irisin levels and erectile dysfunction in type 2 diabetic patients. We compared 34 diabetic patients with erectile dysfunction with 30 diabetic patients without erectile dysfunction. In our study, serum irisin levels were found to be statistically significantly higher in diabetic patients without erectile dysfunction compared to those with erectile dysfunction (p = .016) and according to correlation analysis, irisin levels had a significantly negative correlation with the serum HbA1C value (r = -.294, p = .018). Based on the results of our study, we think that this molecule can be used in the diagnosis or treatment of erectile dysfunction in diabetic patients, if these findings are supported by larger studies.