بررسی اثر ضد باکتریایی مشتقات جدید تیازول، ایمیدازولیدین و تتراهیدروپیریمیدین علیه باکتری‌های بیماری‌زای گرم منفی

نوع مقاله : مقاله های پژوهشی

نویسندگان

1 استادیار، گروه شیمی، دانشکده‌ی علوم پایه، دانشگاه زابل، زابل، ایران

2 دامپزشک، گروه پاتوبیولوژی، دانشکده‌ی دامپزشکی، دانشگاه زابل، زابل، ایران

3 دانشجوی داروسازی، گروه فارماکودینامی و سم‌شناسی، دانشکده‌ی داروسازی، دانشگاه علوم پزشکی مشهد، مشهد، ایران

چکیده

مقدمه: گسترش سویه‌های مقاوم به آنتی بیوتیک‌ها در باکتری‌های گرم منفی بیمارستانی، تهدیدی جدی برای بیماران، کارکنان بیمارستان‌ها و سلامت عمومی به شمار می‌رود. محققین، شناسایی و استفاده از ترکیبات جدید ضد باکتریایی را، یکی از مؤثرترین راه حل‌ها برای مقابله با این تهدیدات می‌دانند. مشتقات تیازول، ایمیدازولیدین و تتراهیدروپیریمیدین از شناخته‌شده‌ترین ترکیبات جدید ضد باکتری هستند. در این مطالعه، اثر ضد باکتریایی ترکیبات پیش‌گفته، بر سه پاتوژن گرم منفی بیمارستانی Proteus mirabilis، Shigella dysenteriae و Acinetobacter baumannii مورد بررسی قرار گرفت.روش‌ها: برای بررسی اثر ضد باکتریایی ترکیبات، روش انتشار در چاهک همراه با اندازه‌گیری قطر هاله‌ی مهار رشد به کار گرفته شد. از روش رقیق‌سازی در پلیت 96 خانه، جهت تعیین حداقل غلظت بازدارندگی رشد (MIC یا Minimum inhibitory concentration) استفاده گردید.یافته‌ها: از میان مشتقات ایمیدازولیدین، تتراهیدروپیریمیدین و تیازول، تنها ترکیب تیازول 4 بر باکتری‌های مورد بررسی اثر مهاری داشت. در آزمایش‌ها، قطر هاله‌ی 4/16 و 3/19 میلی‌متر و MIC 125 و 5/62 میکروگرم بر میلی‌لیتر، به ترتیب برای اثر مهاری بر باکتر‌ی‌های Proteus mirabilis و Shigella dysenteriae برای این ترکیب ثبت گردید. البته، خود این مشتق بر Acinetobacter baumannii هیچ گونه اثری نداشت.نتیجه‌گیری: در این مطالعه قدرت مهاری یکی از مشتقات جدید تیازول بر دو باکتری Shigella dysenteriae و Proteus mirabilis نشان داده شد و می‌توان با انجام آزمایش‌های تکمیلی In vitro و In vivo و شناخت بیشتر خواص درمانی و سمیت این ترکیب، به استفاده از آن برای مقابله با باکتری‌های بیماری‌زا امیدوار بود.

کلیدواژه‌ها


عنوان مقاله [English]

Antibacterial Evaluation of New Thiazole, Imidazolidine and Tetrahydropyrimidine Derivatives against Pathogenic Gram-Negative Bacteria

نویسندگان [English]

  • Hamid Beyzaei 1
  • Behzad Ghasemi 2
  • Vahidreza Askari 3
1 Assistant Professor, Department of Chemistry, School of Science, University of Zabol, Zabol, Iran
2 Veterinarian, Department of Pathobiology, School of Veterinary Medicine, University of Zabol, Zabol, Iran
3 Student of Pharmacy, Department of Pharmacodynamics and Toxicology, School of Pharmacy, Mashhad University of Medical Sciences, Mashhad, Iran
چکیده [English]

Background: Spread of antibiotic-resistant strains of nosocomial gram-negative bacteria is a serious threat to patients, hospital personnel and general health. Researchers consider identifying and using of novel antibacterial compounds as one of the most effective solutions to this threat. Thiazole, imidazolidine and tetrahydropyrimidine derivatives are of the most recognized new antibacterial compounds and in this study, their antibacterial effect against three gram-negative nosocomial bacteria, Proteus mirabilis, Shigella dysenteriae and Acinetobacter baumannii, was evaluated.Methods: For the aim of assessing antibacterial effect, the disk diffusion method and the dilution procedure in 96-well plate were used to determine the diameter of growth inhibition zone and the minimum inhibitory concentration (MIC), respectively.Findings: None of imidazolidines, tetrahydropyrimidines and thiazoles had any inhibitory effect against tested bacteria; only, the inhibitory effect of thiazole 4 was proven on Proteus mirabilis and Shigella dysenteriae with halo diameters of 16.4 and 19.3 mm as well as MICs of 125 and 62.5 µg/ml, respectively. Of course, this compound itself had no inhibitory effect on Acinetobacter baumannii.Conclusion: In this study, the inhibitory effect of one of the novel thiazole derivatives was shown on two bacteria, Proteus mirabilis and Shigella dysenteriae. This compound can be used as bacterial inhibitor if additional in-vitro and in-vivo tests are carried out and its therapeutic effects and toxicity are investigated.

کلیدواژه‌ها [English]

  • Antibacterial effect
  • Thiazoles
  • Imidazolidines
  • Tetrahydropyrimidine
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