Research Article
BibTex RIS Cite

Valproic acid induced oxidative brain injury in rats: Protective effect of edaravone

Year 2026, Issue: Advanced Online Publication, 25.01.2026
https://doi.org/10.33988/auvfd.1738110
https://izlik.org/JA78PE89AN

Abstract

Valproic acid (2-propyl valeric acid, VPA) is the drug of choice for the treatment of migraine, bipolar disorder, and epileptic disorders in both children and adults. Although VPA has beneficial effects, long-term administration is reported to damage many tissues and organs. VPA administration increases free-radical production. Edaravone (3-methyl-1-phenyl-2-pyrazolin-5-one, EDA) is a potent antioxidant that protects against oxidative stress. The aim of our study was to investigate the protective effects of EDA against brain damage in VPA-treated rats. Male Sprague Dawley rats were used in our study. The rats were randomly divided into four groups: control, EDA, VPA, and VPA+EDA. EDA and VPA were administered intraperitoneally at doses of 30 mg/kg and 0.5 g/kg, respectively daily for 7 days. On day 8, all animals were sacrificed under anesthesia, and brain tissues were removed. VPA caused decreases in the levels of reduced glutathione (GSH, P<0.05), glutathione peroxidase (GPx, P<0.001), glutathione reductase (GR, P<0.001), and paraoxonase (PON, P<0.0001). On the other hand, VPA increased values of lipid peroxidation (LPO, P<0.05), catalase (CAT, P<0.05), superoxide dismutase (SOD, P<0.0001), glutathione-S-transferase (GST, P<0.01), xanthine oxidase (XO, P<0.01), adenosine deaminase (ADA, P<0.001), protein carbonyl (PC, P<0.0001), myeloperoxidase (MPO, P<0.0001), sialic acid (SA, P<0.0001), and acetylcholinesterase (AChE, P<0.0001) compared with the control group. EDA reversed all values. These results suggest that EDA administration potentially reduces VPA-induced brain injury.

References

  • Aaberg KM, Gunnes N, Bakken IJ, et al (2017): Incidence and prevalence of childhood epilepsy: a nationwide cohort study. Pediatrics, 139, e20163908.
  • Abe K, Yuki S, Kogure K (1988): Strong attenuation of ischemic and postischemic brain edema in rats by a novel free radical scavenger. Stroke, 19, 480–5.
  • Aebi H (1984): Catalase in vitro. Methods Enzymol, 105, 121–126.
  • Agresti C, Mechelli R, Olla S, et al (2020): Oxidative status in multiple sclerosis and off-targets of antioxidants: the case of edaravone. Curr Med Chem, 27, 2095–2105.
  • Alshogran OY, Aseel YAT, Shreen DN (2022): Exploring the effects of edaravone in rats with contrast-induced acute kidney injury. Life Sci, 309, 121006.
  • Aviram M, Hardak E, Vaya J, et al (2000): Human serum paraoxonases (PON1) Q and R selectively decrease lipid peroxides in human coronary and carotid atherosclerotic lesions: PON 1 esterase and peroxidase-like activities. Circulation, 101, 2510–2517.
  • Baldissera MD, Souza CF, Santos RCV, et al (2018): Blood–brain barrier breakdown and myeloperoxidase activity in silver catfish experimentally infected with Pseudomonas aeruginosa. J Fish Dis, 41, 209-213.
  • Bayrak BB, Sancar S, Hacihasanoglu Cakmak N, et al (2025): Ameliorative effects of edaravone against valproic acid-induced kidney damage. J Mol Histol, 56, 4.
  • Beghi E (2020): The epidemiology of epilepsy. Neuroepidemiology, 54, 185–191.
  • Berlett BS, Stadtman ER (1997): Protein oxidation in aging, disease, and oxidative stress. J Biol Chem, 272, 20313-20316.
  • Beutler E (1975): Reduced Gutathione (GSH). 112–114. In: Bergmeyer HV (ed) Red Blood Cell Metabolism. A Manual Of Biochemical Methods, 2nd edn. Grune and Stratton, New York.
  • Brown BL, Craycraft LK, Justice SB (2020): Valproic acid in the treatment of migraines. Adv Emerg Nurs J, 42, 243–253.
  • Chaudhary S, Ganjoo P, Raiusddin S, et al (2015): Nephroprotec¬tive activities of quercetin with potential relevance to oxidative stress induced by valproic acid. Protoplasma, 252, 209–217.
  • Chaudhary S, Parvez S (2012): An in vitro approach to assess the neurotoxicity of valproic acid-induced oxidative stress in cerebellum and cerebral cortex of young rats, Neuroscience, 225, 258-268.
  • Chen YCB, Liang CS, Wang LJ, et al (2022): Comparative effectiveness of valproic acid in different serum concentrations for maintenance treatment of bipolar disorder: A retrospective cohort study using target trial emulation framework. EClinMed, 54, 101678.
  • Corte ED, Stirpe F (1968): Regulation of xanthine oxidase in rat liver: modifications of the enzyme activity of rat liver supernatant on storage at 20 degrees. Biochem J, 108, 349–351.
  • Crook M, Tutt P (1992): Serum sialic acid concentration in patients with hypertriglyceridaemia showing the Frederickson’s IIB phenotype. Clin Sci, 83, 593–595.
  • Crook M, Haq M, Haq S, et al (1994): Plasma sialic acid and acute-phase proteins in patients with myocardial infarction. Angiology, 45, 709–715.
  • Ellman GL, Courtney KD, Andres V, et al (1961): A new and rapid colorimetric determination of acetylcholinesterase activity. Biochem Pharmacol, 7, 88-95.
  • Feng S, Yang Q, Liu M, et al (2011): Edaravone for acute ischaemic stroke. Cochrane Database of Systematic Reviews, 12, CD007230.
  • Furlong CE, Richter RJ, Seidel SJ (1988): Role of genetic polymor¬phism of human plasma paraoxonase/arylesterase in hydrolysis of the insecticide metabolites chlorpyrifos oxon and paraoxon. Am J Hum Gen, 43, 230–238.
  • Gomes CV, Kaser MP, Tomé AR, et al (2011): Adenosine receptors and brain diseases: neuroprotection and neurodegeneration. Biochim Biophys Acta, 1808, 1380-1399.
  • Graf W, Oleinik O, Glauser T, et al (1998): Altered antioxidant enzyme activities in children with a serious adverse experience related to valproic acid therapy. Neuropediatrics, 29, 195–201.
  • Gunata M, Parlakpinar H, Acet HA (2020): Melatonin: A review of its potential functions and effects on neurological diseases. Rev Neurol, 176, 148–65.
  • Habig WH, Jakoby WB (1981): Assays for differentation of glutathione-S-transferases. Methods Enzymol, 77, 398-405.
  • Hacihasanoglu Cakmak N, Yanardag R (2015): Edaravone, a free radi¬cal scavenger, protects liver against valproic acid induced toxic¬ity. J Serb Chem Soc, 80, 627–637.
  • Hassan MQ, Akhtar MS, Akhtar M, et al (2015): Edaravone protects rats against oxidative stress and apoptosis in experimentally induced myocardial infarction: Biochemical and ultrastructural evidence. Redox Rep, 20, 275–81.
  • Hassan MQ, Akhtar MS, Afzal O, et al (2020): Edaravone and benidipine protect myocardial damage by regulating mitochondrial stress, apoptosis signalling and cardiac biomarkers against doxorubicin-induced cardiotoxicity. Clin Exp Hypertens, 42, 381-392.
  • Heidari R, Jafari F, Khodaei F, et al (2018): Mechanism of valproic acid-induced Fanconi syndrome involves mitochondrial dysfunction and oxidative stress in rat kidney. Nephrol, 23, 351–361.
  • Işık M, Demir Y, Kırıcı M, et al (2015): Changes in the anti-oxidant system in adult epilepsy patients receiving anti-epileptic drugs. Arch Physiol Biochem, 121, 97-102.
  • Jafarian I, Eskandari MR, Mashayekhi V, et al (2013): Toxicity of valproic acid in isolated rat liver mitochondria. Toxicol Mech Methods, 23, 617-623.
  • Jiao SS, Yao XQ, Liu YH, et al (2015): Edaravone alleviates Alzheimer’s diseasetype pathologies and cognitive deficits. Proc Natl Acad Sci U S A, 112, 5225–5230.
  • Jin DQ, Li G, Kim JS, et al (2004): Preventive effects of laminaria japonica aqueous extract on the oxidative stress and xanthine oxidase activity in streptozotocin-induced diabetic rat liver. Biol Pharm Bull, 27,1037–1040.
  • Johnson EL (2019): Seizures and epilepsy. Med Clin North Am, 103, 309–324.
  • Karker H (1964): Method for estimation of serum adenosine deaminase. Scand J Clin Lab Invest, 16, 570-574.
  • Katyayan A, Diaz-Medina G (2021): Epilepsy: Epileptic syndromes and treatment. Neurol Clin, 39, 779–795.
  • Kawasaki T, Kitao T, Nakagawa K, et al (2007): Nitric oxide-induced apoptosis incultured rat astrocytes: protection by edaravone, a radical scavenger. Glia, 55, 1325-1333.
  • Kettle AJ, Winterbourn CC (1997): Myeloperoxidase: a key regulator of neutrophil oxidant production. Redox Rep, 3, 3-15.
  • Kikuchi K, Tancharoen S, Takeshige N, et al (2013): The efficacy of edaravone (radicut), a free radical scavenger, for cardiovascular disease. Int J Mol Sci, 14,13909–13930.
  • Kikuchi K, Uchikado H, Miyagi N, et al (2011): Beyond neurological disease: new targets for edaravone. Int J Mol Med, 28, 899–906.
  • Kikuchi K, Takeshige N, Miura N, et al (2012): Beyond free radical scavenging: beneficial effects of edaravone (Radicut) in various diseases (review). Exp Ther Med, 3, 3–8.
  • Kumar H, Sharma B (2016): Memantine ameliorates autistic behavior, biochemistry & blood brain barrier impairments in rats. Brain Res Bull, 124, 27-39.
  • Ledwozyw A, Michalak J, Stephien A, et al (1986): The rela¬tionship plasma triglycerides, cholesterol, total lipids and lipid peroxidation products during human atherosclerosis. Clin Chim Acta, 155, 275–284.
  • Lehmann M, Regland B, Blennow K, et al (2003): Vitamin B12-B6-folate treatment improves blood-brain barrier function in patients with hyperhomocysteinaemia and mild cognitive impairment. Dement Geriatr Cogn Disord, 16, 145-150.
  • Levine RL, Garland D, Oliver CN, et al (1990): Determination of carbonyl content in oxidatively modified proteins. Methods Enzymol, 186, 464-478.
  • Lowry OH, Rosebrough NJ, Farr AL, et al (1951): Protein mea¬surement with the Folin phenol reagent. J Biol Chem, 193, 265– 275.
  • Lu XY, Meng-Qing L, Yong-Tao L, et al (2024): Oral edaravone ameliorates behavioral deficits and pathologies in a valproic acid-induced rat model of autism spectrum disorder. Neuropharmacology, 258, 110089.
  • Meister A (1983): Selective modification of glutathione metabolism. Science, 220, 472–477.
  • Mylroie AA, Collins H, Umbles C, et al (1986): Erythrocyte super¬oxide dismutase activity and other parameters of copper status in rats ingesting lead acetate. Toxicol Appl Pharmacol, 82, 512–520.
  • Natori T, Kodaira F, Hirasawa T, et al (2008): Augmentation of polysialic acid by valproic acid in early postnatal mouse hippocampus and primary cultured hippocampal neurons. J Biosci Bioeng, 105, 164-167.
  • Navab M, Hama-Levy S, Van Lenten BJ, et al (1997): Mildly oxidized LDL induces an increased apolipoprotein J/paraoxonase ratio. J Clin Invest, 99, 2005–2019.
  • Nematollah A, Maloos N, Abdolali N, et al (2017): Zinc deficiency and oxidative stress involved in valproic acid induced hepatotoxicity: Protection by zinc and selenium supplementation. Biol Trace Elem Res, 179, 102–109.
  • Nermin E, Sheikh A, Petrilla J, et al (2020): The dual-active histamine h3 receptor antagonist and acetylcholine esterase ınhibitor e100 alleviates autistic-like behaviors and oxidative stress in valproic acid induced autism in mice. Int J Mol Sci, 21, 3996.
  • Nishi H, Watanabe T, Sakurai H, et al (1989): Effect of MCI-186 on brain edema in rats. Stroke, 20, 1236–40.
  • Okatani Y, Wakatsuki A, Enzan H, et al (2003): Edaravone protects against ischemia/reperfusion-induced oxidative damage to mitochondria in rat liver. Eur J Pharmacol, 465, 163-170.
  • Oktay NŞ, Alev Tüzüner B, Tunalı S, et al (2024): Potential protective role of radicut in valproic acid-induced oxidative stress in rat spleen. Igusabder, 22, 308-319.
  • Oktay S, Alev-Tüzüner B, Tunalı S, et al (2017): Investigation of the effects of edaravone on valproic acid induced tissue damage in pancreas. Marmara Pharm J, 21, 570–577.
  • Phyu MP, Tangpong J (2014): Neuroprotective effects of xanthone derivative of Garcinia mangostana against lead-induced acetylcholinesterase dysfunction and cognitive impairment. Food Chem Toxicol, 70, 151-156.
  • Reed DJ (1990): Glutathione: Toxicological implications. Annu Rev Pharmacol Toxicol, 30, 603–31.
  • Rodriguez C, Mayo JC, Sainz RM, et al (2004): Regulation of antioxidant enzymes: A significant role for melatonin. J Pineal Res, 36,1–9.
  • Romoli M, Mazzocchetti P, D’Alonzo R, et al (2019): Valproic acid and epilepsy: from molecular mechanisms to clinical evidences. Curr Neuropharmacol, 17, 926–946.
  • Safdar A, Ismail F (2023): A comprehensive review on pharmacological applications and drug-induced toxicity of valproic acid. Saudi Pharm J, 31, 265–278.
  • Sanjiv S, Abhishek K (2019): Protective effect of edaravone on cyclophosphamide ınduced oxidative stress and neurotoxicity in rats. Curr Drug Saf, 14, 209-216.
  • Sari RA, Tays S, Yilmaz O, et al (2003): Correlation of serum levels of adenosine deaminase activity and its isoenzymes with disease activity in rheumatoid arthritis. Clin Exp Rheumatol, 21, 87-90.
  • Seyedinia SA, Tarahomi P, Abbarin D, et al (2023): Saffron and crocin ameliorate prenatal valproic acid-induced autistic-like behaviors and brain oxidative stress in the male offspring rats. Metab Brain Dis, 38, 2231–2241.
  • Shen Y, Zhang J, Xu Y, et al (2023): Ultrasound-enhanced brain delivery of edaravone provides additive amelioration on disease progression in an ALS mouse model. Brain Stimul, 16, 628–641.
  • Sokmen BB, Tunali S, Yanardag R (2012): Effects of vitamin U (S-methyl methionine sulphonium chloride) on valproic acid induced liver injury in rats. Food Chem Toxicol, 50, 3562-3566.
  • Stadtman ER, Levine RL (2000): Protein oxidation. Ann N Y Acad Sci, 899, 191-208.
  • Tarazi FI, Sahli ZT, Wolny M, et al (2014): Emerging therapies for Parkinson’s disease: from bench to bedside. Pharmacol Ther, 144, 123–133.
  • Taş S, Sarandöl E, Dirican M (2014): Vitamin B6 supplementation ımproves oxidative stress and enhances serum paraoxonase/arylesterase activities in streptozotocin-ınduced diabetic rats. Sci World J, 351598.
  • Thimmulappa RK, Chattopadhyay I, Rajasekaran S (2019): Oxidative Stress Mechanism In The Pathogenesis Of Environmental Lung Diseases. 103-137. Oxidative Stress in Lung Diseases. Springer Nature. Singapore.
  • Tunali S, Cimen ES, Yanardag R (2020): The effects of chard on brain damage in valproic acid-induced toxicity. J Food Biochem, 44, e13382.
  • Tunali S, Kahraman S, Yanardag R (2015): Vitamin U, a novel free radical scavenger, prevents lens injury in rats administered with valproic acid. Hum Exp Toxicol, 34, 904-910.
  • Turkyilmaz B, Altas N, Arisan I, et al (2021): Effect of vitamin B6 on brain damage in valproic acid induced toxicity. J Biochem Mol Toxicol, 35, e22855.
  • Turkyilmaz IB, Sokmen BB, Yanardag R (2020): Alpha‐lipoic acid prevents brain injury in rats administered with valproic acid. J Biochem Mol Toxicol, 34, e22580.
  • Türkyılmaz IB, Karatuğ Kaçar A, Bolkent Ş, et al (2023): Damage to liver tissue caused by valproic acid used for treating epilepsy: Protective effects of vitamin B6. Arch Epilepsy, 29, 9-15.
  • Warren L (1959): The thiobarbituric acid assay of sialic acids. J Biol Chem, 234, 1971-1975.
  • Wei H, Frenkel K (1991): In vivo formation of oxidized DNA bases in tumor promoter-treated mouse skin. Cancer Res, 51, 4443-4449.
  • Wendel A (1981): Glutathione peroxidase. Methods Enzymol, 77, 325.
There are 79 citations in total.

Details

Primary Language English
Subjects Veterinary Biochemistry
Journal Section Research Article
Authors

Neziha Hacıhasanoğlu Çakmak 0000-0002-6183-5015

Refiye Yanardağ 0000-0003-4185-4363

Submission Date July 8, 2025
Acceptance Date December 4, 2025
Early Pub Date January 25, 2026
Publication Date January 25, 2026
DOI https://doi.org/10.33988/auvfd.1738110
IZ https://izlik.org/JA78PE89AN
Published in Issue Year 2026 Issue: Advanced Online Publication

Cite

APA Hacıhasanoğlu Çakmak, N., & Yanardağ, R. (2026). Valproic acid induced oxidative brain injury in rats: Protective effect of edaravone. Ankara Üniversitesi Veteriner Fakültesi Dergisi, Advanced Online Publication. https://doi.org/10.33988/auvfd.1738110
AMA 1.Hacıhasanoğlu Çakmak N, Yanardağ R. Valproic acid induced oxidative brain injury in rats: Protective effect of edaravone. Ankara Univ Vet Fak Derg. 2026;(Advanced Online Publication). doi:10.33988/auvfd.1738110
Chicago Hacıhasanoğlu Çakmak, Neziha, and Refiye Yanardağ. 2026. “Valproic Acid Induced Oxidative Brain Injury in Rats: Protective Effect of Edaravone”. Ankara Üniversitesi Veteriner Fakültesi Dergisi, no. Advanced Online Publication. https://doi.org/10.33988/auvfd.1738110.
EndNote Hacıhasanoğlu Çakmak N, Yanardağ R (January 1, 2026) Valproic acid induced oxidative brain injury in rats: Protective effect of edaravone. Ankara Üniversitesi Veteriner Fakültesi Dergisi Advanced Online Publication
IEEE [1]N. Hacıhasanoğlu Çakmak and R. Yanardağ, “Valproic acid induced oxidative brain injury in rats: Protective effect of edaravone”, Ankara Univ Vet Fak Derg, no. Advanced Online Publication, Jan. 2026, doi: 10.33988/auvfd.1738110.
ISNAD Hacıhasanoğlu Çakmak, Neziha - Yanardağ, Refiye. “Valproic Acid Induced Oxidative Brain Injury in Rats: Protective Effect of Edaravone”. Ankara Üniversitesi Veteriner Fakültesi Dergisi. Advanced Online Publication (January 1, 2026). https://doi.org/10.33988/auvfd.1738110.
JAMA 1.Hacıhasanoğlu Çakmak N, Yanardağ R. Valproic acid induced oxidative brain injury in rats: Protective effect of edaravone. Ankara Univ Vet Fak Derg. 2026. doi:10.33988/auvfd.1738110.
MLA Hacıhasanoğlu Çakmak, Neziha, and Refiye Yanardağ. “Valproic Acid Induced Oxidative Brain Injury in Rats: Protective Effect of Edaravone”. Ankara Üniversitesi Veteriner Fakültesi Dergisi, no. Advanced Online Publication, Jan. 2026, doi:10.33988/auvfd.1738110.
Vancouver 1.Hacıhasanoğlu Çakmak N, Yanardağ R. Valproic acid induced oxidative brain injury in rats: Protective effect of edaravone. Ankara Univ Vet Fak Derg [Internet]. 2026 Jan. 1;(Advanced Online Publication). Available from: https://izlik.org/JA78PE89AN

Aim & Scope

The aim of the ‘Ankara Üniversitesi Veteriner Fakültesi Dergisi’ is to publish high quality original articles that will contribute to people working in the fields of animal health, welfare, and production at the international level.

Ankara Üniversitesi Veteriner Fakültesi Dergisi is one of the journals’ of Ankara University, which is the first well-established university in the Republic of Turkey. Research articles, short communications, case reports, and invited review articles are published, covering all aspects of animal health, welfare, and production. The journal is published on a quarterly since 1954 and indexing in Science Citation Index-Expanded (SCI-Exp) since April 2007. 




Click here for a sample title page.

Click here for a sample research article.

Click here for a sample case report and short communication


Instruction to Authors

1. The language of the journal is English.
2. Original research articles, reviews, case reports, letter to editor and short communications on all aspects of veterinary science, which had not been previously published elsewhere in whole or in part except abstract not exceeding 250 words, are published in the journal.
Review articles are only be submitted by invitation.
3. Manuscripts (including footnotes, references, figure legends, and tables) should be prepared with the following attributes: 12-point Times New Roman, double-spaced typed, 3-cm ample margins, sequential line numbering, and A4 page size. Page numbers should also be written on the top-middle of each page except the first page.
4. Manuscripts including figures and tables should not be exceeding 15 pages for original research articles, 10 pages for review articles, 7 pages for case reports and short communications.
5. All manuscripts should be submitted online using the journal’s submission system. Once a manuscript has been submitted electronically via an online system, the order of authorship (including adding or removing authors) cannot be changed.
6. Original research articles and case reports must be prepared in the following order: title, author/s, address, ORCID knowledge, abstract, keywords, introduction, materials and methods, results, discussion and conclusion, acknowledgement, conflict of interest and references.
7. Subdivisions of introduction, materials and methods, results, and discussion and conclusion should not be placed in short communications and case report.
8. In the acknowledgement section, if the article is produced by a doctoral or master’s thesis or support information or presented at the scientific meeting, the explanation should be made. Explanation/s regarding the study should be indicated.
Title should be short and clear and be written with small letters.
Author/s should be indicated as first and last name. Last name/s should be written with capital letters. All authors should write the ORCID.
Abstract should be written as a single paragraph not exceeding 250 words.
Keywords should be written from 3 to 5 words and should be given alphabetically
Introduction should include the literature review related to the study. The purpose/s and hypothesis of study should be indicated in the last paragraph of the introduction.
Materials and Methods should be brief, clear, and without unnecessary details. Type of research (descriptive, observation, experimental, case-control, follow-up etc.), characteristics of subjects, inclusion and exclusion criteria, sampling method if it was used in conjunction with the data collection phase, and reason for sampling method without probability, if it was used, should be indicated. Sample size and its calculation method, power value is calculated, and censored and missing numbers should be indicated. Statistical analysis and its software applications should be indicated.
Results should be explained briefly. Information stated in tables or figures should not be repeated in the text.
Subheadings should be typed with italic and second subheadings should be typed with normal fonts in both materials and methods and results sections. Subheadings in italics should be placed at the beginning of the paragraph.
Abbreviations, symbols and units: Abbreviations should be placed in parenthesis next to word/s written the first time and then they should be used as abbreviations in the text i.e. Canine Transmissible Venereal Tumor (CTVT). Genus and species names in Latin should be indicated with an italic font. All measurements must be indicated according to Systeme Internationale (SI) units.
Discussion and Conclusion: should include the interpretation of present study results with other study results indicated in the reference list.
Acknowledgements: If the study is produced from a doctoral-PhD or master’s thesis or presented at scientific meetings, this should be notified in the acknowledgement section.
Financial Support: Financial support for the conduct of the research should be stated. If no funding source(s) was involved then this should be notified as “This research received no grant from any funding agency/sector.”
Ethical Statement: Studies based on animal experiments should include an approval statement of Ethical Committee in this section of the manuscript. This study was approved by the Ankara University Animal Experiments Local Ethics Committee (XXXXXXX).
Conflict of Interest: Please inform the details of all known situations with the potential bias to the work. If the authors have not any conflict of interest, it should be written as “The authors declared that there is no conflict of interest.”
Author Contributions: XX and XY conceived the idea and planned the manuscript. MN, and ZZ contributed to sample preparation. XX and YY have made significant scientific support and also contributed to the interpretation of the results. All authors provided significant contributions by giving feedback and help shape the manuscript.
Data Availability Statement: The data supporting this study's findings are available from the corresponding author upon reasonable request.
Animal Welfare: The authors confirm that they have adhered to ARRIVE Guidelines to protect animals used for scientific purposes.
References list should be numbered alphabetically. Each reference should be ordered with author’s name in black, parenthesized publication year in normal, title in italic, and short name of journal and page numbers in normal and its volume number in black font. The periodicals must be abbreviated according to "Periodical Title Abbreviations: By Abbreviation". For references with more than 3 authors, only the first 3 authors should be listed, followed by "et al." In the text, references must be cited with a number, and if the name of author was indicated, just the last name should be written before the reference number. If more than two authors were present in the reference, just last name of the first author followed by “et al” should be written in the text. In a single sentence, numbers of references should be limited to 5 ordered from small to higher number.
The following is the style used for common types of references:
[Times New Roman 12 bold] ( It should be numbered and written in alphabetical order)
1. Adams DC, Rohlf FJ, Slice DE (2004): Geometric morphometrics: ten years of progress following the revolution. Ital J Zool, 71, 5-16.
2. AOAC (2000): Association of Official Analytical Chemists, Official Methods of Analysis, 17th ed. AOAC International Maryland USA.
3. Bishop CD (1995): Antiviral activity of the essential oil of Melaleuca alternifolia (Maiden and Betche) Cheel (tea tree) against tobacco mosaic virus. J Essential Oil Res, 7, 641- 644.
4. Hui YH (1996): Oleoresins and essential oils. 145-153. In: Hui YH (Ed.). Bailey’s industrial oil and fat products. Wiley-Interscience Publication. New York, USA.
5. Lamont LA, Bulmer BJ, Sisson DD, et al (2002): Doppler echocardiographic effects of medetomidine on dynamic left ventricular outflow tract obstruction in cats. J Am Vet Med Assoc, 221, 1276-1281.
6. Sandstedt K, Ursing J, Walder M (1983): Thermotolerant Campylobacter with no or weak catalase activity isolated from dogs. Curr Microbiol, 8, 209-213.
7. Sandstedt K, Ursing J (1991): Description of the Campylobacter upsaliensis previously known as CNW group. Syst Appl Microbiol, 14, 39-45.

Please use the following data for arranging your references,
For journals:
Lamont LA, Bulmer BJ, Sisson DD, et al (2002): Doppler echocardiographic effects of medetomidine on dynamic left ventricular outflow tract obstruction in cats. J Am Vet Med Assoc, 221, 1276-1281.
For proceedings:
Griban VG, Stepchenko LM, Zhorina LV (1988): The live weight gain and disease resistance of young cattle and poultry stock as influenced by physiologically active peat preparation. 45-50. In: Proceedings of 8th International Peat Congress. Leningrad, Russia.
For books:
Falconer DS (1960): Introduction to Quantitative Genetics. Oliver and Boyd Ltd, Edinburgh.
For book chapters:
Bahk J, Marth EH (1990): Listeriosis and Listeria monocytogenes. 248-256. In: DO Cliver (Ed), Foodborne Diseases. Academic Press, San Diego.
For thesis
Aladaş A (2013): Koyunlarda kırkım öncesi C vitamini ve humik asit uygulamasının kırkım stresini azaltmasındaki etkisinin incelenmesi. Yüksek Lisans Tezi. Afyon Kocatepe Üniversitesi Sağlık Bilimleri Enstitüsü, Afyonkarahisar.
For electronic materials:
Li G, Hart A, Gregory J (1998): Flokülasyona hız gradyanı etkisi. Available at http://www.server.com/projects/paper2.html. (Accessed May 20, 2004).

Images should be at least 1920 x 1280 dpi resolutions.
Tables and figures should be placed into separate sheets as a last part of the manuscript.

9.Manuscript with a copyright release form signed by all authors.
10.Ankara Universitesi Veteriner Fakültesi Dergisi uses a double-blind review procedure, which both the reviewer and author identities are concealed from each other throughout process. Authors approve to submit their manuscript in compliance with the double-blind review policy.
11.Authors are responsible for the article published in the journal.
12.Studies comparing products with trade name are not an interest of this journal.
13.Any materials or products used in the study should not include their trade names.

ETHICAL POLICY

With the awareness of responsibility as a being the first Faculty of Veterinary Medicine in Turkey, we consider the principles of transparency, confidentiality and accountability within the framework of ethical rules in the whole process of national and international dissemination of knowledge. We also aim to continuously improve all processes in an efficient and competitive structure with a quality-oriented approach.
We expect all authors/reviewers to read and understand our ethics policy before submitting/evaluating a manuscript. The chief goal of our policy is to provide advice for the ethical responsibilities to authors, editors and reviewers.
Ankara Üniversitesi Veteriner Fakültesi Dergisi follows the European Code of Conduct for Research Integrity, (https://ec.europa.eu/research/participants/data/ref/h2020/other/hi/h2020-ethics_code-of-conduct_en.pdf). (1). Refereed articles are studies require scientific methods and they provide objectivity. All components of publication process (publisher, editors, authors, reviewers and readers) should obey ethical rules for scientific production. Within this context, the policies of ‘publication ethics’ and ‘open access’ also require all components of publication process to obey the ethical principles, in direction of guides and policies of Committee on Publication Ethics (COPE), as “Code of Conduct and Best Practice Guidelines for Journal Editors” and “COPE Best Practice Guidelines for Journal Editors”.The authors are expected to fulfil the criterias proposed by McNutt et al.,(2018) (2). The editorial and publication processes of the journal are managed according to the regulations by Council of Higher Education (Turkey) (3).

General rules
- Original research articles, reviews, case reports and short communications on all aspects of veterinary science, which had not been previously published elsewhere in whole or in part except abstract not exceeding 250 words, are published in the journal.
- All manuscripts are checking by plagiarism checker (iThenticate) and allowing for peer-review under %25 score after filtering the references.
- The manuscript copyright release form is signed by all authors.
- Ankara Üniversitesi Veteriner Fakültesi Dergisi uses a double-blind review procedure, in which both the reviewer and author identities are concealed from each other throughout the process. The authors approve to submit their manuscript in compliance with the double-blind review policy.
- The authors are responsible for the article published in the journal.
- Studies comparing products with trade names are not the interest of this journal.
- Any materials or products used in the study should not include their trade names.
- Studies based on animal experiments should include an approval statement of the Ethical Committee in the materials and methods section.

Please take into consideration the recommendations for following ethical codes:
• Authorship
• Plagiarism (including self-plagiarism)
• Data fabrication / data falsification
• Duplicate submission
• Corrections and retractions
• Human and Animal Rights
• Conflicts of interest / Competing interests
• Intellectual property


The Ethical Responsibilities of the Authors

It is expected that the author (s) who submit the study to the Ankara Üniversitesi Veteriner Fakültesi Dergisi comply with the following ethical responsibilities:

- The works submitted by the author (s) are expected to be original.
- If the author (s) benefit from other studies or use other studies, they must cite completely and accurately.
- People who do not contribute to the content intellectually in the creation of the study should not be specified as an author.
- If the study sent for publication has situations and relations that may constitute a conflict of interest, it should be explained.
- The raw data regarding the articles can be requested from the author (s) within the framework of the evaluation processes, in such a case the author (s) must be ready to present the expected data and information to the editorial board and the scientific board.
- In the event that the author (s) notices a mistake or error related to the published, early-view or evaluation phase, there is an obligation to inform the editor of the journal or the publisher, to cooperate with the editor in correction or withdrawal.
- Authors cannot submit their work to the evaluation process of more than one journal at the same time.

Ethical Duties and Responsibilities of the Editors
The editor and field editors of the Ankara Üniversitesi Veteriner Fakültesi Dergisi should follow the the guidelines of "COPE Code of Conduct and Best Practice Guidelines for Journal Editors" and "COPE Best Practice Guidelines for Journal Editors" published by the Committee on Publication Ethics (COPE).

- Making efforts to meet the information needs of readers and authors,
- Continuous development of the journal,
- Carrying out processes to improve the quality of the works published in the journal,
- Ensuring academic integrity,
- Continuing business processes without compromising intellectual property rights and ethical standards,
- Show clarity and transparency in terms of publication on issues requiring correction and explanation.
- Editors should make a positive or negative decision based on the importance of the work including the originality, validity, clarity of expression, and the goals and objectives of the journal.
- Unless there is a serious problem for the studies that are suitable for publication, they should take the preliminary evaluation stage.
- The editors should not ignore the positive reviews of the referees unless there is a serious problem with the work.
- New editors should not change the decisions made by the previous editor (s) for the work unless there is a serious problem.
- The editor must determine the referees in accordance with the subject of the study.
- It is obliged to provide the information and guides that the referees will need during the evaluation phase.

Ethical Responsibilities of Referees
The process of evaluating the Ankara Üniversitesi Veteriner Fakültesi Dergisi is carried out with the principle of double-sided blind refereeing. Reviewers cannot communicate directly with the authors, and the reviews and comments are shared through the journal management system. In this process, the review forms and the referee comments on the full texts are sent to the author (s) through the editor. In this context, the reviewers who evaluate the study for the Ankara Üniversitesi Veteriner Fakültesi Dergisi are expected to have the following ethical responsibilities:

- The referee should only accept to evaluate work related to his area of expertise.
- The referee should evaluate the assessment in neutrality and confidentiality.
- If the referee thinks he/she is facing a conflict of interest during the evaluation process, he/she should refuse to review the study and inform the journal editor.
- The referee should make the assessment objectively only in relation to the content of the study. Nationality, gender, religious beliefs, political beliefs and commercial concerns should not affect the assessment.
- The assessment should be constructive and kindly.
- The referee should perform the evaluation on time.

If you encounter an unethical situation or content in the Ankara Üniversitesi Veteriner Fakültesi Dergisi, please report it to Vfdergi@veterinary.ankara.edu.tr


References
1. ALLEA - All European Academies (2017): European Code of Conduct for Research Integrity, Revised Edition. Available at
https://ec.europa.eu/research/participants/data/ref/h2020/other/hi/h2020-ethics_code-of-conduct_en.pdf
2. McNutt, MK, Bradford, M, Drazen, JM, et al (2018): Transparency in authors’ contributions and responsibilities to promote integrity in scientific publication. Proceedings of the National Academy of Sciences, 115, 2557-2560.
3. YÖK - Yükseköğretim Kurulu (2018): Yükseköğretim Kurumları Bilimsel Araştırma ve Yayın Etiği Yönergesi. Available at https://www.yok.gov.tr/Sayfalar/Kurumsal/mevzuat/bilimsel-arastirma-ve-etik-yonetmeligi.aspx


JOURNAL POLICY

- There are no submission fees, publication fees or page charges for publication in Ankara Üniversitesi Veteriner Fakültesi Dergisi.
- The journal employs double blind reviewing. For publication of articles, two positive reports are required. It is anticipated that the publication review process of the studies submitted to Ankara Üniversitesi Veteriner Fakültesi Dergisi be completed in 6 months. However, the period during which editors or reviewers ask the author(s) to do editing and the author(s) complete the editing is not included in this time frame.
- No correction can be made in a published article.

There are no submission fees, publication fees or page charges for publication in ‘Ankara Univ Vet Fak Derg’.

BAŞ EDİTÖR

Animal Welfare, Animal Science, Genetics and Biostatistics

Editör Kurulu

Radiology and Organ Imaging, Veterinary Surgery
Veterinary Food Hygiene and Technology
Veterinary History of Veterinary and Deontology
Host-Parasite Interactions, Parasitology, Veterinary Parasitology
Reproduction and Artificial Insemination
Veterinary Parasitology
Animal Health Economics and Management
Molecular Genetics, Animal Reproduction and Breeding, Animal Science, Genetics and Biostatistics
Animal Behaviour, Veterinary Anatomy and Physiology, Veterinary Sciences (Other)
Veterinary Internal Medicine
Veterinary Histology and Embryology
Ecotoxicology, Aquatic Toxicology , Pesticides and Toxicology, Veterinary Pharmacology
Animal Nutrition
Veterinary Sciences
Animal Behaviour, Veterinary Anatomy and Physiology
Veterinary Sciences
Veterinary Sciences
Veterinary Sciences
Veterinary Sciences
Veterinary Sciences
Veterinary Virology
Veterinary Obstetrics and Gynecology
Veterinary Sciences
Veterinary Sciences
Veterinary Epidemiology
Veterinary Anatomy and Physiology
Bacteriology, Pharmaceutical Toxicology, Basic Pharmacology, Environmental Biotechnology Diagnostics (Incl. Biosensors), Climate Change-Impact and Adaptation, Environmental Biogeochemistry, Internationalization in Higher Education, One Health, Food Microbiology, Aquaculture and Fisheries, Fish Pests and Diseases, Veterinary Sciences
Veterinary Pathology
Veterinary Obstetrics and Gynecology
Animal Science, Genetics and Biostatistics
Cell Metabolism, Cancer Biology, Veterinary Biochemistry
Animal Welfare, Animal Science, Genetics and Biostatistics
Veterinary Sciences, Veterinary Pathology
Veterinary Epidemiology, Veterinary Immunology, Veterinary Mycology, Veterinary Microbiology, Veterinary Diagnosis and Diagnostics