PMID- 24442604 OWN - NLM STAT- MEDLINE DCOM- 20150204 LR - 20211021 IS - 1567-2387 (Electronic) IS - 1567-2379 (Linking) VI - 45 IP - 4 DP - 2014 Aug TI - N-Acetylcysteine counteracts oxidative stress and protects alveolar epithelial cells from lung contusion-induced apoptosis in rats with blunt chest trauma. PG - 463-71 LID - 10.1007/s10735-014-9563-6 [doi] AB - The aim of this study was to investigate the protective effects of N-acetylcysteine (NAC) on peroxidative and apoptotic changes in the contused lungs of rats following blunt chest trauma. The rats were randomly divided into three groups: control, contusion, and contusion + NAC. All the rats, apart from those in the control group, performed moderate lung contusion. A daily intramuscular NAC injection (150 mg/kg) was given immediately following the blunt chest trauma and was continued for two additional days following cessation of the trauma. Samples of lung tissue were taken in order to evaluate the tissue malondialdehyde (MDA) level, histopathology, and epithelial cell apoptosis using terminal deoxynucleotidyl transferase dUTP nick-end labeling (TUNEL) assay and active caspase-3 immunostaining. In addition, we immunohistochemically evaluated the expression of surfactant protein D (SP-D) in the lung tissue. The blunt chest trauma-induced lung contusion resulted in severe histopathological injury, as well as an increase in the MDA level and in the number of cells identified on TUNEL assay together with active caspase-3 positive epithelial cells, but a decrease in the number of SP-D positive alveolar type 2 (AT-2) cells. NAC treatment effectively attenuated histopathologic, peroxidative, and apoptotic changes, as well as reducing alterations in SP-D expression in the lung tissue. These findings indicate that the beneficial effects of NAC administrated following blunt chest trauma is related to the regulation of oxidative stress and apoptosis. FAU - Topcu-Tarladacalisir, Yeter AU - Topcu-Tarladacalisir Y AD - Department of Histology and Embryology, Faculty of Medicine, Trakya University, Edirne, 22030, Turkey, yeter_topcu@yahoo.com. FAU - Tarladacalisir, Taner AU - Tarladacalisir T FAU - Sapmaz-Metin, Melike AU - Sapmaz-Metin M FAU - Karamustafaoglu, Altemur AU - Karamustafaoglu A FAU - Uz, Yesim Hulya AU - Uz YH FAU - Akpolat, Meryem AU - Akpolat M FAU - Cerkezkayabekir, Aysegul AU - Cerkezkayabekir A FAU - Turan, Fatma Nesrin AU - Turan FN LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't DEP - 20140118 PL - Netherlands TA - J Mol Histol JT - Journal of molecular histology JID - 101193653 RN - WYQ7N0BPYC (Acetylcysteine) SB - IM MH - Acetylcysteine/*therapeutic use MH - Animals MH - Apoptosis/drug effects MH - Contusions/*drug therapy MH - Epithelial Cells/*cytology/*drug effects MH - Female MH - Lung Injury/*drug therapy MH - Oxidative Stress/*drug effects MH - Pulmonary Alveoli/*cytology MH - Rats MH - Rats, Sprague-Dawley MH - Thoracic Injuries/*drug therapy EDAT- 2014/01/21 06:00 MHDA- 2015/02/05 06:00 CRDT- 2014/01/21 06:00 PHST- 2013/10/28 00:00 [received] PHST- 2014/01/09 00:00 [accepted] PHST- 2014/01/21 06:00 [entrez] PHST- 2014/01/21 06:00 [pubmed] PHST- 2015/02/05 06:00 [medline] AID - 10.1007/s10735-014-9563-6 [doi] PST - ppublish SO - J Mol Histol. 2014 Aug;45(4):463-71. doi: 10.1007/s10735-014-9563-6. Epub 2014 Jan 18.