Acibadem Hospital Group

İstanbul, Turkey

Acibadem Hospital Group

İstanbul, Turkey
SEARCH FILTERS
Time filter
Source Type

Yapici C.,University of Pittsburgh | Surer L.,University of Pittsburgh | Surer L.,Acibadem Hospital Group | Keklikci K.,University of Pittsburgh | And 6 more authors.
Knee Surgery, Sports Traumatology, Arthroscopy | Year: 2017

Purpose: The purpose of this study is to compare knee laxity and graft function (tissue force) between anatomic and non-anatomic posterolateral (PL) bundle augmentation. Methods: Twelve (n = 12) fresh-frozen mature, unpaired porcine knees were tested using a robotic testing system. Four knee states were compared: (a) intact anterior cruciate ligament (ACL), (b) deficient PL and intermediate bundles, (c) anatomic PL augmentation, and (d) non-anatomic PL augmentation. Anterior tibial translation (ATT), internal rotation (IR) and external rotation (ER), and the in situ tissue force were measured under an 89.0-N anterior tibial load and 4.0-N m internal and external tibial torques. Results: Both anatomic and non-anatomic PL augmentation restored the ER, IR, and ATT of the intact knee at all knee flexion angles (n.s.). Both anatomic and non-anatomic PL augmentation restored the in situ tissue force of the ACL during ER and IR loading and ATT loading at all knee flexion angles except at 60° of knee flexion, where the non-anatomic PL augmentation did not restore the in situ tissue force of the ACL during external rotation loading and the anatomic PL augmentation did not restore the in situ tissue force of the ACL during IR loading. Furthermore, there were no differences in ATT, IR, ER, and in situ tissue force under anterior tibial loading, IR and ER loading between the two reconstruction groups. Conclusion: There were no significant differences between anatomic and non-anatomic PL augmentation using the porcine knee model. © 2017 European Society of Sports Traumatology, Knee Surgery, Arthroscopy (ESSKA)


Oktem-Okullu S.,Technical University of Istanbul | Oktem-Okullu S.,Acibadem University | Tiftikci A.,Acibadem University | Tiftikci A.,Acibadem Hospital Group | And 12 more authors.
PLoS ONE | Year: 2015

The outcome of H. pylori infection is closely related with bacteria's virulence factors and host immune response. The association between T cells and H. pylori infection has been identified, but the effects of the nine major H. pylori specific virulence factors; cagA, vacA, oipA, babA, hpaA, napA, dupA, ureA, ureB on T cell response in H. pylori infected patients have not been fully elucidated. We developed a multiplex- PCR assay to detect nine H. pylori virulence genes with in a three PCR reactions. Also, the expression levels of Th1, Th17 and Treg cell specific cytokines and transcription factors were detected by using qRT-PCR assays. Furthermore, a novel expert derived model is developed to identify set of factors and rules that can distinguish the ulcer patients from gastritis patients. Within all virulence factors that we tested, we identified a correlation between the presence of napA virulence gene and ulcer disease as a first data. Additionally, a positive correlation between the H. pylori dupA virulence factor and IFN-γ, and H. pylori babA virulence factor and IL-17 was detected in gastritis and ulcer patients respectively. By using computer-based models, clinical outcomes of a patients infected with H. pylori can be predicted by screening the patient's H. pylori vacA m1/m2, ureA and cagA status and IFN-γ (Th1), IL-17 (Th17), and FOXP3 (Treg) expression levels. Herein, we report, for the first time, the relationship between H. pylori virulence factors and host immune responses for diagnostic prediction of gastric diseases using computer - based models. © 2015 Oktem-Okullu et al. This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.


Kemerdere R.,Istanbul University | Kacira T.,Acibadem Hospital Group | Hanimoglu H.,Istanbul University | Kucur M.,Istanbul University | And 2 more authors.
Journal of Neurological Surgery, Part A: Central European Neurosurgery | Year: 2013

Background and Study Aims Thioredoxin reductase (TrxR) is a redox protein that is considered to play a role in tumor progression. The purpose of this study was to assess the expression of TrxR in blood and tumor samples of glioblastoma multiforme (GBM) patients. Patients TrxR levels were evaluated in blood and GBM tissues extracted from 27 patients, in normal brain tissues of 12 autopsy cases, and in blood samples of 12 healthy subjects. The results were compared between tumor and control groups. Results The mean level of TrxR in GBM tissues (74.5 ± 14.9 U/g wet tissue) was remarkably higher than in normal brain tissues (14.8 ± 3.4 U/g wet tissue). The mean TrxR levels in blood were significantly higher in GBM patients (296.3 ± 43.6 U/mL) than in the controls (203.0 ± 11.3 U/mL). Conclusions These findings suggest that high levels of TrxR may be related to progression of GBM. © 2013 Georg Thieme Verlag KG Stuttgart, New York.

Loading Acibadem Hospital Group collaborators
Loading Acibadem Hospital Group collaborators