Engin Oral

Engin Oral

orcid

Research Focus & Metrics

Academic Career Length

8Years (2019-Present)

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

Representative Publications

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14 March 2022
Verified
Journal Article
Open access
PBPınar Yalçın Bahat
Pınar Yalçın Bahat
IAIsil Ayhan
Isil Ayhan
EOEda Ureyen Ozdemir
Eda Ureyen Ozdemir
ÜIÜmit Inceboz
Ümit Inceboz
EOEngin Oral
Engin Oral
As search for optimal therapy continues for endometriosis, aid of dietary supplements is gaining attention. Supplements can be used for their anti-inflammatory, anti-oxidant, anti-proliferative and immune modulatory charactheristics. We reviewed the literature, evaluated and synthesized effects of vitamin D, zinc, magnesium, omega 3, propolis, quercetin, curcumin, N-acetylcysteine, probiotics, resveratrol, alpha lipoic acid, vitamin C, vitamin E, selenium and epigallocatechin-3-gallate. Based on results of in vitro, animal and human studies, it might be safe to say that dietary supplements can be used as a complementary treatment for endometriosis.

21 March 2025 in Journal of Clinical Medicine
Verified
Journal Article
Open access
PDF file
PÖPınar Özcan
Pınar Özcan
BVBulut Varlı
Bulut Varlı
ESErtan Sarıdoğan
Ertan Sarıdoğan
EOEngin Oral
Engin Oral
MMM. Mabrouk
M. Mabrouk
Alin Stefan ConstantinAlin Stefan Constantin
Alin Stefan Constantin
Ovarian endometriomas (OEMs), cystic formations within the ovaries, are a significant manifestation of endometriosis and present in 20–40% of affected women. Despite extensive research, the pathogenesis of endometriosis remains unclear, with retrograde menstruation, coelomic metaplasia, and lymphatic dissemination being proposed mechanisms. OEMs negatively impact ovarian function by reducing the ovarian reserve, disrupting folliculogenesis, and altering the ovarian microenvironment through oxidative stress, inflammation, and fibrosis. Elevated reactive oxygen species (ROS) accelerate follicular atresia, and extracellular matrix remodeling contributes to ovarian damage, while immune dysregulation and cytokine imbalances further exacerbate the condition. The presence of OEMs does not significantly affect live birth rates in in vitro fertilization (IVF) treatments, despite potential reductions in the quality and quantity of oocytes. However, their surgical excision compromises the ovarian reserve. This review highlights the complex mechanisms by which OEMs impair ovarian function and emphasizes the need for further research to develop strategies that mitigate these effects, ultimately improving reproductive outcomes for women with endometriomas.

1 December 2019 in Journal of Gynecology Obstetrics and Human Reproduction
Verified
Journal Article
Closed access
EOEngin Oral
Engin Oral
GTGuven Toksoy
Guven Toksoy
NSNigar Sofiyeva
Nigar Sofiyeva
HCHale Goksever Celik
Hale Goksever Celik
BKBirsen KARAMAN
Birsen KARAMAN
OUOya Zehra Uyguner
Oya Zehra Uyguner

1 May 2020 in Journal of Gynecology Obstetrics and Human Reproduction
Verified
Journal Article
Closed access
EOEngin Oral
Engin Oral
ISIsık Sozen
Isık Sozen
SUSezin Uludag
Sezin Uludag
FDFuat Demirkiran
Fuat Demirkiran
SISennur Ilvan
Sennur Ilvan
HCHale Goksever Celik
Hale Goksever Celik

Verified
Journal Article
Open access
PDF file
BGBerivan Guzelbag
Berivan Guzelbag
NGNazli Ece Gungor
Nazli Ece Gungor
HKHadice Karahan
Hadice Karahan
AMAlireza Maghsoudi
Alireza Maghsoudi
EOEngin Oral
Engin Oral
Endometriosis affects approximately 10% of reproductive-age women and is associated with genomic instability; however, the contribution of specific DNA repair deficiencies remains poorly understood. This study investigated the expression and function of GEN1, a Holliday junction resolvase critical for homologous recombination, in patient-derived endometrial epithelial organoids (EEOs). Endometrial tissue was obtained by pipelle biopsy from women with laparoscopically confirmed endometriosis (n = 3, stage III–IV) and controls without endometriosis (n = 3). GEN1 mRNA and protein expression were reduced in primary endometrial cells from endometriosis patients compared with controls (mRNA: 0.52 ± 0.14 vs. 1.00 ± 0.19, p = 0.05; immunofluorescence intensity: 0.54 ± 0.18 vs. 1.00 ± 0.22, p = 0.05). Patient-derived EEOs from the endometriosis group showed trends toward lower formation efficiency (18.4 ± 5.6% vs. 25.2 ± 6.8%, p = 0.10) and reduced mean diameter (124.6 ± 34.2 vs. 155.8 ± 32.6 µm, p = 0.10). RNA interference (RNAi)-mediated GEN1 knockdown reduced proliferation in both groups, with a more pronounced effect in endometriosis-derived EEOs (49.7% vs. 39.5% reduction, p = 0.05). Endometriosis-derived EEOs exhibited elevated baseline γH2AX (phosphorylated histone H2AX) immunofluorescence compared with controls (2.32 ± 0.44 vs. 1.00 ± 0.28, p = 0.05), indicating increased DNA double-strand break accumulation. Furthermore, GEN1 knockdown directly increased γH2AX intensity in both groups, with endometriosis-derived EEOs showing a greater absolute increase (Δ1.26 vs. Δ0.72). To our knowledge, this study provides the first organoid-based evidence that GEN1 is downregulated in endometriosis and functionally linked to impaired proliferation and elevated DNA damage, suggesting a potential contribution of homologous recombination dysregulation to endometriosis pathogenesis.

1 December 2020 in Translational Cancer Research
Verified
Journal Article
Open access
PDF file
HTHasan Onur Topçu
Hasan Onur Topçu
CKCihan Kaya
Cihan Kaya
EOEngin Oral
Engin Oral
Endometrial cancer (EC) is the most common cancer of the female reproductive system in developed countries. The incidence of EC has been increasing in young women. Approximately 4% of cases are aged <40 years. These young women may wish to delay therapy until after they have children. Common complaints in patients with EC include irregular vaginal bleeding, pelvic pain, and enlarged uterus. Imaging techniques such as transvaginal ultrasound (TVUS) or magnetic resonance imaging (MRI) can be utilized in detecting EC. Although the recommended treatment of EC is hysterectomy and bilateral salpingo-oophorectomy with or without systemic lymph node dissection, loss of reproductive function is the primary limiting factor of this surgical approach. Some studies have reported favorable results with high-dose oral progestins or levonorgestrel-releasing intrauterine system or hysteroscopic tumor resection followed by treatment with high-dose oral progestins. The most widely utilized medical treatment regimens are medroxyprogesterone acetate (MPA) 250–600 mg/day or megestrol acetate (MA) 160–480 mg/day. However, there is still a lack of evidence to establish the optimal dose and duration of progestin treatment. Patients with complete remission (CR) who wish to conceive must be encouraged, and referral to a fertility clinic should be offered as soon as possible. The key aspect of fertility-sparing management in women with EC appears to be the selection of appropriate candidates. Owing to the rarity of this condition, management may often be suboptimal. The aim of this review is to assess the current approaches to management of young women with EC who wish to preserve their fertility.