Researcher:
İncir, Said

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Said

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İncir

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İncir, Said

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2016 - 201992020 - 202217

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    Improving the urine spot protein/creatinine ratio by the estimated creatinine excretion to predict proteinuria in pediatric kidney transplant recipients
    (Wiley, 2021) Palaoğlu, Kerim Erhan; N/A; İncir, Said; Taşdemir, Mehmet; Koçak, Burak; Yelken, Berna; Arpalı, Emre; Akyollu, Başak; Baygül, Arzu Eden; Bilge, İlmay; Türkmen, Aydın; Doctor; Faculty Member; Faculty Member; Doctor; Doctor; Doctor; Faculty Member; Faculty Member; Doctor; N/A; School of Medicine; School of Medicine; N/A; N/A; N/A; School of Medicine; School of Medicine; N/A; Koç University Hospital; N/A; N/A; Koç University Hospital; Koç University Hospital; Koç University Hospital; N/A; N/A; Koç University Hospital; 175430; 175867; 220671; N/A; N/A; N/A; 272290; 198907; N/A
    Background Since the daily creatinine excretion rate (CER) is directly affected by muscle mass, which varies with age, gender, and body weight, using the spot protein/creatinine ratio (Spot P/Cr) follow-up of proteinuria may not always be accurate. Estimated creatinine excretion rate (eCER) can be calculated from spot urine samples with formulas derived from anthropometric factors. Multiplying Spot P/Cr by eCER gives the estimated protein excretion rate (ePER). We aimed to determine the most applicable equation for predicting daily CER and examine whether ePER values acquired from different equations can anticipate measured 24 h urine protein (m24 h UP) better than Spot P/Cr in pediatric kidney transplant recipients. Methods This study enrolled 23 children with kidney transplantation. To estimate m24 h UP, we calculated eCER and ePER values with three formulas adapted to children (Cockcroft-Gault, Ghazali-Barratt, and Hellerstein). To evaluate the accuracy of the methods, Passing-Bablok and Bland-Altman analysis were used. Results A statistically significant correlation was found between m24 h UP and Spot P/Cr (p < .001, r = 0.850), and the correlation was enhanced by multiplying the Spot P/Cr by the eCER equations. The average bias of the ePER formulas adjusted by the Cockcroft-Gault, Ghazali-Barratt, and Hellerstein equations were -0.067, 0.031, and 0.064 g/day, respectively, whereas the average bias of Spot P/Cr was -0.270 g/day obtained by the Bland-Altman graphics. Conclusion Using equations to estimate eCER may improve the accuracy and reduce the spot urine samples' bias in pediatric kidney transplantation recipients. Further studies in larger populations are needed for ePER reporting to be ready for clinical practice.
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    Immature platelet fraction: Is a novel early predictive marker for disease severity in patients with Covid-19 pneumonia?
    (De Gruyter Open Ltd, 2021) Tasdemir, Z.A.; Palaoğlu, K.E.; N/A; İncir, Said; Komesli, Zeynep; Baygül, Arzu Eden; Çaltı, Hatice Kant; Kapmaz, Mahir; Tekin, Süda; Kılıç, Alparslan; Dağel, Tuncay; Okan, Ayşe; Somay, Kayra; Akpınar, Timur Selçuk; Doctor; Doctor; Faculty Member; Doctor; Doctor; Doctor; Doctor; Doctor; Doctor; Doctor; Faculty Member; N/A; N/A; School of Medicine; N/A; N/A; N/A; N/A; N/A; N/A; N/A; School of Medicine; Koç University Hospital; Koç University Hospital; N/A; Koç University Hospital; Koç University Hospital; Koç University Hospital; Koç University Hospital; Koç University Hospital; Koç University Hospital; Koç University Hospital; N/A; 175430; N/A; 272290; N/A; N/A; 42146; N/A; N/A; N/A; N/A; 216646
    Objectives : In many diseases, immature platelet fraction (IPF%) is related to coagulopathy and poor outcome. This study aimed to investigate the predictive value of IPF% for the severity of pneumonia in patients with Coronavirus Disease 2019 (COVID-19). Methods : A total of 154 patients with COVID‐19 infections were included. The patients were divided into two groups according to the severity of pneumonia (severe and non-severe) regarding their oxygen demand. Results : Given laboratory parameters, the median IPF% was significantly higher in the severe group (11.9 vs. 3.9%, p<0.001). Mean platelet volume (p<0.001), platelet-large cell ratio (p=0.001), platelet distribution width (p=0.001), D-Dimer (p<0.001), INR (p=0.003), and aPTT (p=0.007) were also found to be significantly higher in the severe group. Moreover, IPF (p=0.014, Odds ratio = 2.000, 95%CI: 1.149-3.482) was an independent predictor for the severity. The curve value from receiver operating characteristics was 0.879 (p<0.001, 95%CI: 0.784-0.943) for determining the severity of pneumonia. IPF% had a sensitivity and specificity value of 69.5 and 92.4% to detect the disease’s severity. Conclusions : IPF% is an independent predictor for the severity of COVID-19 pneumonia. Assessment of IPF% may both help to early determine high-risk patients with COVID-19 and to alert the physicians. / Amaç : Pek çok hastalıkta, immatür platelet fraksiyonu (%İPF), koagülopati ve kötü sonuçla ilişkilidir. Bu çalışma, Coronavirus Hastalığı 2019 (COVID-19) olan hastalarda pnömoni şiddeti için %İPF’nin prediktif değerini araştırmayı amaçladı. Yöntem : COVID-19 enfeksiyonu olan toplam 154 hasta dahil edildi. Hastalar, oksijen ihtiyaçları göz önüne alınarak pnömoni şiddetine göre (ağır ve ağır olmayan) iki gruba ayrıldı. Bulgular : Laboratuvar parametrelerine bakıldığında, medyan İPF yüzdesi ağır grupta anlamlı olarak daha yüksekti (%11.9′a karşı %3.9, p<0.001). Ortalama trombosit hacmi (p<0.001), trombosit-büyük hücre oranı (p=0.001), trombosit dağılım genişliği (p=0.001), D-Dimer (p<0.001), İNR (p=0.003) ve aPTT (p=0.007) ağır grupta anlamlı olarak daha yüksek bulundu. Ayrıca, İPF (p=0.014, Odds oranı = 2.000, %95 CI: 1.149-3.482) hastalık şiddeti için bağımsız bir öngördürücü olarak bulundu. Algılayıcı işletim eğrisinden gelen eğri değeri, pnömoni şiddetini belirlemek için 0.879 (p<0.001, %95 CI: 0.784-0.943) idi. İPF, hastalığın şiddetini saptamak için %69.5′lik duyarlılık ve %92.4′lük özgüllük değerine sahipti. Sonuç : İPF, COVID-19 pnömonisinin şiddeti için bağımsız bir öngörücüdür. %İPF’nin değerlendirilmesi, hem COVID-19′lu yüksek riskli hastaları erken belirlemeye hem de hekimleri uyarmaya yardımcı olabilir.
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    In-vitro AMH production of ovarian tissue samples in culture correlates with their primordial follicle pool
    (Elsevier, 2020) N/A; N/A; N/A; N/A; N/A; N/A; Vatansever, Doğan; İncir, Said; Bildik, Gamze; Taşkıran, Çağatay; Öktem, Özgür; Faculty Member; Faculty Member; PHD Student; Faculty Member; Faculty Member; School of Medicine; School of Medicine; Graduate School of Health Sciences; School of Medicine; School of Medicine; N/A; 193687; 175430; N/A; 134190; 102627
    Objective: We aimed to investigate if there is a correlation between in-vitro AMH production and primordial follicle reserve of the ovarian cortical samples in culture. Methods: Seven patients undergoing laparoscopic excision of ovarian dermoid cysts were included in the study. 0.5 x 0.5 cm of ovarian cortical samples embedded within the cyst wall were removed and cultured for one day. Then, the cultured cortical pieces were fixed, paraffin-embedded and serially sectioned for histormorphometric analysis. AMH and estradiol (E-2) production of the samples after one-day culture period were measured in the spent culture media. Primordial follicle density was expressed as the number of primordial follicles per mm(2). Pearson correlation and linear regression analyses were applied. Results: The mean age of the patients was 29.2 +/- 6.8 (ranging from 18 to 36). There was a negative correlation between age and PF density (r=-0.92, %95CI: -0.99 to -0.76, p <0.001). In-vitro AMH level of the cortical samples was significantly associated with age (R-2 = 0.67, p = 0.023), primordial follicle density (R-2 = 0.71, p = 0.015). There was a borderline significance between in-vitro levels of AMH and E-2 level (R-2 = 0.55, p = 0.058). A similar comparison could not be made for secondary follicles (preantral and small antral follicles) because of their rarity in the histological sections analyzed. Conclusions: This histomorphometric study provides evidence that in-vitro AMH production of the ovarian cortical samples reflects primordial follicle pool of the samples. (C) 2020 Elsevier B.V. All rights reserved.
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    The effects of genistein supplementation on fructose induced insulin resistance, oxidative stress and inflammation
    (Elsevier, 2016) Bolayirli, I. Murat; Inan, Oznur; Aydin, M. Serif; Bilgin, I. Ahmet; Sayan, Ismet; Esrefoglu, Mukaddes; Seven, Arzu; N/A; İncir, Said; Faculty Member; School of Medicine; Koç University Hospital; 175430
    Aims: This experimental study was designed to investigate the effects of 10 weeks genistein administration on oxidative stress and inflammation in serum and liver of rats fed with fructose. Main methods: 6-8 weeks old, 40 male Sprague-Dawley rats were included. Group 1 (control) was fed with standard chow food and 100 1/kg/day/rat dimethyl sulfoxide (DMSO) administered subcutaneously; group 2 (genistein) with standard chow food and 025 mg/kg/day/rat genistein; group 3 (fructose) with standard chow food and drinking water 20% fructose, group 4 (fructose + genistein) with standard chow food, drinking water with 20% fructose and 025 mg/kg/day/rat genistein. TNF-alpha, IL-6, visfatin as inflammatory markers and 8-isoprostane as a oxidative stress marker were measured by ELISA, glucose, triglyceride, total cholesterol, LDL-cholesterol and HDL-cholesterol by enzymatic calorimetric method, AST and ALT by kinetic UV method. Key findings: Significantly high 8-isoprostane levels in serum (p < 0.001) and liver (p < 0.05) in group 3 compared to control group indicate that presence of oxidative stress. Significantly high TNF-alpha and IL-6 levels in serum (p < 0.05) and liver (p < 0.01) and visfatin levels in serum (p < 0.001) of group 3 indicate inflammation accompanying insulin resistance and oxidative stress. Genistein administration to fructose group causes a significant decrease in HOMA-IR (p < 0.001) and LDLC (p < 0.05) level. Significantly lower serum 8-isoprostane (p < 0.01) level indicates the antioxidant effect of genistein and significantly lower liver TNF-alpha (p < 0.01), serum, liver IL-6(p < 0.01) and serum visfatin (p < 0.01) levels reflect the antiinflammatory effects of genistein. Significance: Genistein administration to rats fed with fructose causes an ameliorating effect on HOMA-IR values and lipid status markers in addition to its antioxidant and antiinflammatory effects.
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    Predicting value of serum procalcitonin, c-reactive protein, drain fluid culture, drain fluid interleukin-6, and tumor necrosis factor- alpha levels in anastomotic leakage after rectal resection
    (Mary Ann Liebert, Inc., 2017) Bilgin, Ismail Ahmet; Hatipoglu, Engin; Aghayeva, Afag; Arikan, Akif Enes; Torun, Muzeyyen Mamal; Dirican, Ahmet; Erguney, Sabri; N/A; İncir, Said; Faculty Member; School of Medicine; Koç University Hospital; 175430
    Background: Anastomotic leak is the most dreaded septic complication of colorectal surgical procedures. Death is proportional to the time between occurrence and diagnosis of the leakage. Biomarkers, which may help to predict anastomotic leakage before appearance of its clinical features, may be beneficial in preventing adverse outcomes. This study investigates a biomarker that might be useful to predict rectal anastomotic leakage before its clinical presentation. Patients and Methods: Serum procalcitonin and C-reactive protein (CRP) levels, bacterial proliferation, interleukin-6 (IL-6) and tumor necrosis factor-alpha (TNF-alpha) levels of drain fluid were evaluated in 50 consecutive patients who underwent low anterior resection without diverting ostomy for rectal carcinoma. Results: Anastomotic leakage occurred in seven of 50 (14%) patients. Serum CRP and procalcitonin levels at post-operative day three were higher in patients with anastomotic leakage (p=0.01, p=0.02 respectively). Drain TNF-alpha values were increased 63.2% on post-operative day five when compared with post-operative day three in patients with anastomotic leakage, but were decreased in patients without leakage. There was no statistical difference for drain IL-6 levels between groups. The bacterial proliferation rate of drain fluid culture in the leakage group was 42.9% at post-operative day three and 85.7% at post-operative day five (p=0.29 and p=0.0001, respectively). Conclusions: High serum CRP and procalcitonin values on post-operative day three are alarming, and assessment of anastomotic leakage by abdominal imaging with rectal contrast is suggested. In addition, increasing levels of TNF-alpha and bacterial proliferation in drain fluid are predictive, whereas IL-6 is not.
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    Effect of nasal antihistamine on secretory IgA in nasal lavage of rats
    (Springer, 2018) Dogan, Remzi; Aksoy, Fadlullah; Goktas, Seda Sezen; Yildirim, Yavuz Selim; Ozturan, Orhan; N/A; Koçak, İlker; İncir, Said; Doctor; Doctor; N/A; Koç University Hospital; Koç University Hospital; N/A; 175430
    The humoral IgA is an immunoglobulin which plays a defensive role for organisms on mucosal surfaces. Today, intranasal antihistamines are effectively used in the treatment of allergic rhinitis. In our study, the effect of azelastine hydrochloride-a nasal antihistaminic-on humoral IgA of the nasal mucosa has been reviewed empirically. Twenty-four female Sprague-Dawley rats were included in our study. The rats were divided into three groups randomly. Group 1(azelastine hydrochloride): rats in this group had nasal azelastine hydrochloride (0.05%) applied for 30 days at 10 A mu l/nostril dosage. Group 2 (saline): saline (0.09%) was applied to the rats in this group for 30 days at 10 A mu l/nostril dosage. Group 3 (control): no application was made throughout the study. The chemicals applied in Groups 1 and 2 were applied to both nostrils by mounting a flexible micropipette to the end of an insulin injector. At the beginning of the study, nasal lavage was performed to both nostrils of the rats in every group on the 15th and 30th day to aspirate irrigation solution (distilled water). The aspirated liquids were kept at - 80A degrees temperature and reviewed together at the end of study. Within-group comparisons: in Group 1 (azelastine hydrochloride), the humoral IgA value on the 15th day was significantly higher than the basal value (p = 0.037). There is a significant difference between humoral IgA value on the 30th day and humoral IgA value on the 15th day (p = 0.045). In Group 2 (saline), no significant difference is available between basal, 15th day and 30th day humoral IgA values (p = 0.265). In Group 3 (control), no significant difference is available between basal, 15th day and 30th day humoral IgA values (p = 0.374). Between-group comparison: there is no significant difference in between-group humoral IgA basal values (p = 0.714). On days 15 and 30, Humoral IgA value of Group 1 was significantly higher than that of Groups 2 and 3 (p = 0.013, p = 0.024, respectively). According to the results we achieved in our study, nasal antihistaminic (azelastine hydrochloride) significantly increases the level of humoral IgA. Our study is the first one in the literature to reveal a relation between nasal antihistaminic and humoral IgA and there is a further need for clinical, randomized and prospective studies.
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    Acute effects of salt on blood pressure are mediated by serum osmolality
    (Wiley, 2018) Afsar, Baris; Siriopol, Dimitrie; Kuwabara, Masanari; Rodriguez-Iturbe, Bernardo; Lanaspa, Miguel A.; Covic, Adrian; Johnson, Richard J.; N/A; Kanbay, Mehmet; Aslan, Gamze; Dağel, Tuncay; Çamkıran, Volkan; İncir, Said; Faculty Member; Doctor; Doctor; Doctor; Faculty Member; School of Medicine; N/A; N/A; N/A; School of Medicine; N/A; Koç University Hospital; Koç University Hospital; Koç University Hospital; N/A; 110580; N/A; N/A; N/A; 175430
    It is classically thought that it is the amount of salt that is critical for driving acute blood pressure responses. However, recent studies suggest that blood pressure responses, at least acutely, may relate to changes in serum osmolality. Here, we test the hypothesis that acute blood pressure responses to salt can be altered by concomitant water loading. Ten healthy patients free of any disease and medication underwent 4 interventions each a week apart in which they took 300 mL of lentil soup with no salt (visit 1), lentil soup with 3 g salt (visit 2), or lentil soup with 3 g salt and 500 mL water (visit 3) or 750 mL water (visit 4). At each visit, hourly blood measurements and blood pressure measurements (baseline, 1st, 2nd, 3rd, and 4th hour) were performed and plasma osmolarity, sodium and copeptin levels were measured. Patients receiving the 3 g salt showed a 6 mOsm/L change in osmolality with a 2.5 mmol/L change in plasma sodium and 10 mm Hg rise in systolic blood pressure at 2 hours. When the same patients drank salty soup with water, the changes in plasma osmolarity, plasma sodium, and blood pressure were prevented. The ability to raise blood pressure acutely with salt appears dependent on changes in plasma osmolality rather than the amount of salt. Our findings suggest that concurrent intake of water must be considered when evaluating the role of salt in blood pressure.
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    Can immature granulocyte count and hemogram indices begood predictors of urinary tract infection in children?
    (Association of Clinical Biochemistry Specialists, 2021) Palaoğlu, Kerim Erhan; N/A; N/A; N/A; N/A; N/A; İncir, Said; Taşdemir, Mehmet; Çaltı, Hatice Kant; Baygül, Arzu Eden; Bilge, İlmay; Faculty Member; Faculty Member; Doctor; Faculty Member; Faculty Member; School of Medicine; School of Medicine; N/A; School of Medicine; School of Medicine; N/A; N/A; Koç University Hospital; N/A; N/A; 175430; 175867; N/A; 272290; 198907
    Objectives: A left shift in a complete blood count (CBC) indicates the presence of immature granulocytes (IGs), and an elevated count is associated with a bacterial infection. The aim of this study was to evaluate the role of the IG count and inflammatory CBC parameters and indices in children with a urinary tract infection (UTI). Methods: In this retrospective study, 55 children with a UTI (patient group) and 47 children with no infection matched for age and sex (control group) were enrolled. The symptoms, clinical findings, CBC parameters, and platelet-to-lymphocyte ratio (PLR), neutrophil-to-lymphocyte ratio (NLR), systemic immune-inflammatory index (SII), and urinalysis findings were recorded. The C-reactive protein (CRP) level, urine culture results, and radiological data for the UTI group were also noted and analyzed. Results: The IG count; leukocyte, platelet, and neutrophil counts; and the CRP value were higher in the patient group than in the control group (p=0.001, 0.001, 0.035, 0.001, and < 0.001, respectively). The NLR, PLR, SII, and mean platelet volume were not significantly different between the groups. The median hemoglobin level was significantly lower in the patient group than in the control group (10.9 g/dL vs. 12.2 g/dL; p=0.004). The area under the curve values for CRP, and counts of IG, leukocytes, and neutrophils were 0.851 (95% confidence interval [CI]: 0.761-0.917), 0.736 (95% CI: 0.633-0.823), 0.714 (95% CI: 0.609-0.804), and 0.670 (95% CI: 0.564-0.765), respectively. Conclusion: The IG count is an easily obtained measurement that can be utilized alongside the CRP value and other indicators to create better predictive value in the management of UTI.
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    The verification study of the new Sysmex XN-3100 automated haematology analyzer (AHA) with Sysmex XE-2100 and microscopic examination
    (Elsevier, 2019) Palaoglu, Kerim Erhan; N/A; İncir, Said; Faculty Member; School of Medicine; Koç University Hospital; 175430
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    The positive effects of the human amniotic membrane on the healing of staple line after sleeve gastrectomy applied long-evans rat model
    (Springer, 2019) Ferhatoğlu, Murat Ferhat; Kıvılcım, Taner; Şenol, Kazım; Vural, Gürcan; Kartal, Abdulcabbar; Filiz, Ali İlker; Kebudi, Abut; N/A; İncir, Said; Faculty Member; School of Medicine; 175430
    Background The staple line leakage is a dangerous complication of sleeve gastrectomy. Various strategies have been tried to reduce the leakage risk. The amniotic membrane (AmM) is the inner layer of the placental membranes and has anti-inflammatory, anti-fibrosis, and anti-scarring effects, and it also has lower immune characteristics which are another essential characteristic of AmM concerning its utility for grafting. In this study, we aimed to investigate the impact of AmM on the staple line healing process of sleeve gastrectomy model in rats. Materials and Methods We used twenty-eight Long-Evans rats in this study. Sleeve gastrectomy was performed with tristapler. Fourteen rats served as controls, AmM was applied staple line of the other fourteen. Fourteen animals were sacrificed (seven from the AmM applied group and the other seven from the control group) on the third postoperative day. And, the other fourteen animals were sacrificed (seven from the AmM applied group and seven from the control group) on the seventh postoperative day. The tissue around the staple line was evaluated microscopically and macroscopically, bursting pressures and hydroxyproline levels were also measured. Results The bursting pressure and hydroxyproline measurements of the AmM applied group was significantly higher on the seventh postoperative day (p = 0.015, p = 0.012) Fibroblast activity and neoangiogenesis of the AmM applied group was also significantly higher on the seventh postoperative day (p = 0.004, p = 0.002). Conclusion This study showed that covering of staple line of sleeve gastrectomy model in rats significantly provided higher bursting pressures and increased hydroxyproline levels, fibroblast activity, and neoangiogenesis which may potentially lead a better staple line healing. We think further investigations are needed on this issue.