Erman Akkus

Dr. Erman Akkus


Research Focus & Metrics

Academic Career Length

9Years (2018-Present)

(Calculated once Scilit publication data is synced: current year − year of first publication + 1)

Representative Publications

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17 November 2018 in Cardiovascular Diabetology
Verified
Journal Article
Open access
PDF file
ADAysegul Durak
Aysegul Durak
YOYusuf Olgar
Yusuf Olgar
SDSinan Degirmenci
Sinan Degirmenci
EAErman Akkus
Erman Akkus
ETErkan Tuncay
Erkan Tuncay
BTBelma Turan
Belma Turan
Metabolic syndrome (MetS) is a prevalent risk factor for cardiac dysfunction. Although SGLT2-inhibitors have important cardioprotective effects in hyperglycemia, their underlying mechanisms are complex and not completely understood. Therefore, we examined mechanisms of a SGLT2-inhibitor dapagliflozin (DAPA)-related cardioprotection in overweight insulin-resistant MetS-rats comparison with insulin (INSU), behind its glucose-lowering effect. A 28-week high-carbohydrate diet-induced MetS-rats received DAPA (5 mg/kg), INSU (0.15 mg/kg) or vehicle for 2 weeks. To validate MetS-induction, we monitored all animals weekly by measuring body weight, blood glucose and HOMO-IR index, electrocardiograms, heart rate, systolic and diastolic pressures. DAPA-treatment of MetS-rats significantly augmented the increased blood pressure, prolonged Q–R interval, and low heart rate with depressed left ventricular function and relaxation of the aorta. Prolonged-action potentials were preserved with DAPA-treatment, more prominently than INSU-treatment, at most, through the augmentation in depressed voltage-gated K+-channel currents. DAPA, more prominently than INSU-treatment, preserved the depolarized mitochondrial membrane potential, and altered mitochondrial protein levels such as Mfn-1, Mfn-2, and Fis-1 as well as provided significant augmentation in cytosolic Ca2+-homeostasis. Furthermore, DAPA also induced significant augmentation in voltage-gated Na+-currents and intracellular pH, and the cellular levels of increased oxidative stress, protein-thiol oxidation and ADP/ATP ratio in cardiomyocytes from MetS rats. Moreover, DAPA-treatment normalized the increases in the mRNA level of SGLT2 in MetS-rat heart. Overall, our data provided a new insight into DAPA-associated cardioprotection in MetS rats, including suppression of prolonged ventricular-repolarization through augmentation of mitochondrial function and oxidative stress followed by improvement of fusion–fission proteins, out of its glucose-lowering effect.

11 June 2022 in Journal of Cancer Research and Clinical Oncology
Verified
Journal Article
Closed access
PDF file
MGMustafa Gürbüz
Mustafa Gürbüz
YKYasin Kutlu
Yasin Kutlu
EAErman Akkus
Erman Akkus
EKElif Berna Köksoy
Elif Berna Köksoy
NBNaziyet Köse Baytemür
Naziyet Köse Baytemür
ADAhmet Demirkazık
Ahmet Demirkazık



30 January 2025 in International Journal of Cancer
Verified
Journal Article
Open access
EAErman Akkus
Erman Akkus
BKBeliz Bahar Karaoğlan
Beliz Bahar Karaoğlan
MKMehmet Kayaalp
Mehmet Kayaalp
UTUtkucan Turmuş
Utkucan Turmuş
CACihangir Akyol
Cihangir Akyol
GUGüngör Utkan
Güngör Utkan
Early‐onset colorectal cancer (EOCRC) is an alarming entity worldwide. Yet, stage‐specific characteristics and prognosis in localized and synchronous metastatic EOCRC are not well‐defined. Two cohorts of CRC patients (localized and synchronous metastatic) were evaluated, defining EOCRC as the diagnosis <50 years old. Five hundred sixty‐eight patients were included (n = 432 localized, 14.4% [n = 62] EOCRC and n = 136 synchronous metastatic, 20.6% [n = 28] EOCRC). 93.5% of localized and 96.5% of synchronous metastatic EOCRC patients were symptomatic at diagnosis. Among localized patients, female gender (58.1% vs. 40%, p = .008), perineural invasion (41.9% vs. 24.9%, p = .005), folinic acid, 5‐fluorouracil, and oxaliplatin chemotherapy (45.2% vs. 25.2%, p = .003), and perioperative chemotherapy cycles (9.21 [± 3.10] vs. 7.98 [± 2.92], p = .006) were higher in EOCRC compared with ≥50‐year. Median recurrence‐free survival (RFS) and overall survival were not reached in either group (p = .234 and p = .831). Only RAS mutant status was associated with RFS (Hazard ratio: 7.09 [95% confidence interval (CI): 1.87–26.76], p < .001) in EOCRC. Among synchronous metastatic patients, urgent surgery (32.1% vs. 11.1%, p = .014) and local treatments (39.3% vs. 20.4%, p = .037) were more frequent in EOCRC. Median progression‐free survival and overall survival in the EOCRC and ≥50 years were 8.07 months (95% CI: 5.03–12.97) vs. 10.03 months (95% CI, 8.40–13.10) (p = .450) and 18.57 months (95% CI, 13.33–43.03) vs. 19.83 months (95% CI, 16.07–27.30) (p = .833), respectively. Synchronous metastatic EOCRC more frequently underwent urgent surgery (32.1% vs. 8%, p = .008) and had RAS mutation (43.5% vs. 16.7%, p = .032) than localized EOCRC. This study suggests that localized and synchronous metastatic EOCRC patients may have different characteristics than average onset, without survival differences. Implementation of stage‐specific characteristics into daily practice is necessary for decision‐making processes in these young patients.

23 June 2020 in TURKISH JOURNAL OF MEDICAL SCIENCES
Verified
Journal Article
Open access
EAErman Akkus
Erman Akkus
ÇFÇiğdem Fi̇dan
Çiğdem Fi̇dan
GDGülşah Demi̇rci̇
Gülşah Demi̇rci̇
AKAli Aytuğ KUŞTAŞ
Ali Aytuğ KUŞTAŞ
MYMeltem Kurt Yüksel
Meltem Kurt Yüksel
Immune thrombocytopenia (ITP) is treated by corticosteroids and/or intravenous immune globulin as the first line treatment when necessary. Mean platelet volume (MPV) is a marker of platelet production and function. In this study, we aimed to search the relationship between the MPV and the treatment response in ITP patients and it was hypothesized that MPV can be used as a predictor of the response. The seventy newly diagnosed adult primary ITP patients and seventy of healthy people were included. MPV between ITP and healthy population, MPV in the diagnosis and after the treatment between the responders and the non-responders were compared. The responders had significantly higher MPV and the non-responders had significantly lower MPV than the healthy population (11.09 and 10.21 fL, P = 0.03; 9.38 and 10.21 fL, P = 0.001). MPV in the diagnosis was significantly higher in the responders than the non-responders (11.09 and 9.38 fL, P = 0.005). MPV significantly changed after the treatment in the responders (11.09 to 9.32 fL, P = 0,004). MPV can be used as a predictor of early response to the first line treatment in newly diagnosed adult primary ITP patients.