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AK, ESİN

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ESİN

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    PublicationOpen Access
    Comparison of the protective effect of alpha lipoic acid and quercetin in methotrexate- induced lung damage
    (2023-03-01) AK, ESİN; OKTAY, NİHAL ŞEHKAR; AK E., MUHAN A., ÇALIŞKAN Ş., OKTAY N. Ş.
    Objective: The aim of this experiment is to investigate and compare the effects of alpha lipoic acid (ALA) and quercetin (QUE) on methotrexate (MTX)-induced lung injury in rats. Method: Wistar Albino rats were distributed into control, MTX, MTX+ALA and MTX+QUE groups with each consisting of 6 rats. Except control group, MTX administrated to rats as a single dose (20 mg/kg) intraperitoneally (i.p.) on the first day. Saline (0.1 cc/100 gr/day, i.p.) was injected to rats in control and MTX groups for 5 days. In MTX+ALA and MTX+QUE groups, rats had injections of ALA (50 mg/kg/day, i.p.) and QUE (50 mg/kg/day, i.p.) for 5 days. After sacrification on day 6, lung tissues were excised out for histopathologic and biochemical investigation. Results: MTX group showed massive hemorrhage with edema in the interstitium, significant inflammatory cell infiltration, and severe alveolar destruction and vascular congestion. Additionally, significant increases in oxidative stress markers as malondialdehyde and sialic acid and significant decreases in antioxidants as glutathione, superoxide dismutase and catalase were detected at the tissue level in MTX group (p<0.0001, p<0.0001, p<0.0001, p=0.03 and p<0.0001, respectively). Both ALA and QUE treatment led to a prominent improvement in morphologic damage. Moreover, ALA and QUE resulted in the reversal of the alterations seen in the tissue oxidative damage markers and antioxidant activities as well. We could not reveal a significant difference between MTX+ALA and MTX+QUE group in terms of morphologic damage and biochemical markers of oxidative injury (p>0.05). Conclusion: Our study showed the similar protective effect of ALA and QUE in MTX induced lung damage. Further studies are warranted to verify the results of our outcome.
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    PublicationOpen Access
    Protective role of progesterone on lung injury induced by ischemia reperfusion of the lower limbs
    (2022-01-01) AK, ESİN; OKTAY, NİHAL ŞEHKAR; ÖZBEYLİ, DİLEK; AK, KORAY; AK E., OKTAY N. Ş., ÖZBEYLİ D., Muhan A., AK K.
    Objective: Remote lung injury is one of the most challenging issues in patients undergoing ischemia reperfusion (IR) injury of the lower limbs. We examined the role of progesterone (PG) on the remote injury of the lungs seen after IR of the lower limbs. Methods: Eighteen male Sprague Dawley rats were divided into three groups. (1) Control: rats had only two physiological saline injections intraperitoneally (i.p.) 2 h apart under general anesthesia. (2) IR: underwent 2 h tourniquet induced ischemia for both lower limbs followed by 2 h of reperfusion. Animals were injected with physiological saline (i.p.) before both ischemia and reperfusion. (3) IR + PG: rats underwent the same IR protocol as the IR group and were injected with PG (16 mg/kg, i.p.) before both ischemia and reperfusion. After reperfusion, rats were sacrificed, and lung tissues were taken out for histopathologic and biochemical analyses. Results: In IR + PG group, tissue levels of malondialdehyde and nitric oxide decreased significantly compared with the IR group (p<0.01). Similarly, glutathione level and superoxide dismutase and glutathione S-transferase activities significantly increased in the IR + PG group than in the IR group (p<0.05, p<0.01, and p<0.05, respectively). In light microscopy, reduced inflammatory cell infiltration, amelioration in alveolar structure, and mild vascular congestion in the parenchyma were seen in the IR + PG group. A significant improvement in histopathologic score was seen in the IR + PG group compared with the IR group (p<0.001). Conclusion: PG might be effective in attenuating remote injury of the lung in lower body IR via its antioxidant function
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    PublicationOpen Access
    Protective role of white cabbage extract against amiodarone-induced lung damage in rats
    (2022-03-01) AK, ESİN; AK E., TÜRKYILMAZ İ. B., MUHAN A., YANARDAĞ R.
    Amaç: Bu çalışmada amiodaron’un sebep olduğu akciğer hasarında beyaz lahananın koruyucu etkileri araştırılmıştır. Materyal ve Metot: Bu çalışmada, sıçanlar 4 gruba ayrılmıştır. Kontrol grup: dokunulmamış sıçanlar, WCAE grup, sıçanlara 7 gün 500 mg/kg beyaz lahana ekstraktı verildi; AMD grup, sıçanlara 7 gün 100 mg/kg amiodaron (AMD) verildi; AMD+WCAE grup, sıçanlara aynı dozlarda beyaz lahana ekstraktı ve AMD verildi. Bulgular: AMD+WCAE grubunda, beyaz lahana ekstraktı tedavisi interstisyal ödem ve konjesyonun azalmasına, alveolar yapılarda iyileşme ve bunun yanı sıra parankimdeki enflamatuvar hücre infiltrasyonun gerilemesine sebep olmuştur. Ek olarak, AMD+WCAE grubunda parankimde kollajen liflerinin birikmesinde önemli derecede bir azalma görülmüştür. Akciğerdeki glutatyon seviyesi, total antioksidan kapasitesi ve glutatyon-S-transferaz, paraoksonaz and karbonik anhidraz aktiviteleri azalırken, lipit peroksidasyon, ileri okside protein ürünleri, total oksidan durumu, reaktif oksijen türleri, oksidatif stres indeksi, nitrik oksit ve hidroksiprolin seviyeleri, katalaz, süperoksit dismutaz, glutatyon peroksidaz, glutatyon redüktaz, laktat dehidrogenaz and ksantin oksidaz aktiviteleri AMD grubunda artmıştır. Beyaz lahana ekstraktı tedavisi AMD’un neden olduğu bu seviyeleri ve aktiviteleri tersine çevirmiştir. Sonuç: Beyaz lahana ekstraktının amiodaron’un sebep olduğu akciğer hasarını azaltabileceği sonucuna varabiliriz. Anahtar Kelimeler: Akciğer, amiodaron, beyaz lahana ekstraktı, oksidatif stres