بررسی اثر هم‌افزایی ضدباکتریایی آنتی بیوتیک کوتریموکسازول و عصاره سیاه‌دانه بر روی سویه‌ی استاندارد استافیلوکوکوس اورئوس مقاوم به متی‌سیلین

نوع مقاله : مقاله پژوهشی

نویسندگان

1 گروه میکروب شناسی، دانشکده پزشکی، دانشگاه شاهد، تهران، ایران

2 گروه میکروب شناسی، دانشکده پزشکی، دانشگاه شاهد، تهران، ایران.

3 گروه مهندسی علوم زیستی، دانشکده علوم و فنون نوین دانشگاه تهران، تهران، ایران

4 گروه علوم وفنون نوین پزشکی، دانشکده پیراپزشکی، دانشگاه شهیدصدوقی یزد، یزد، ایران

چکیده

مقدمه و هدف: استافیلوکوکوس اورئوس مقاوم به متی‌سیلین (MRSA) یکی از عوامل مهم عفونت‌های بیمارستانی در دنیا می‌باشد که نسبت به بسیاری از آنتی بیوتیک‌های رایج، مقاوم شده است. افزایش روزافزون مقاومت آنتی بیوتیکی در باکتری‌ها توجه به داروهای گیاهی و مواد ضدمیکروبی طبیعی را بیشتر نموده است. سیاه‌دانه به دلیل داشتن متابولیت ‌هایی مانند تیموکینون دارای اثرات مختلفی از جمله خاصیت ضد باکتریایی می‌باشد. این تحقیق با هدف تعیین اثر ضد باکتریایی عصاره سیاه‌دانه و آنتی بیوتیک کوتریموکسازول و همچنین اثر ترکیبی این دو ماده بر روی سویه استاندارد MRSA در شرایط آزمایشگاهی انجام شد.
مواد و روش ها: در این مطالعه، اثر ضد میکروبی عصاره سیاه دانه و آنتی بیوتیک کوتریموکسازول بصورت جداگانه و با هم با استفاده از روش چکربورد بر روی سویه استاندارد (ATCC33591) MRSA به روش میکرودایلوشن بررسی شده و حداقل غلظت بازدارندگی از رشد (MIC) آن‌ تعیین گردید.
نتایج: آنتی بیوتیک کوتریموکسازول در MIC 5 میکروگرم بر میلی‌لیتر و عصاره سیاه‌دانه در 687/4 میلی‌گرم بر میلی‌لیتر مانع از رشد باکتری مورد نظر شدند. هنگام ترکیب این دو با یکدیگر MIC برای هر دو ترکیب عصاره و آنتی بیوتیک به طور چشمگیری کاهش یافت. این مقادیر برای عصاره 292/0 میلی‌گرم بر میلی‌لیتر و برای آنتی بیوتیک برابر با 2 میکرو‌گرم بر میلی‌لیتر تقلیل یافتند.
نتیجه‌گیری: طبق نتایج بدست آمده، فعالیت ضد باکتریایی عصاره اتانولی سیاه دانه و آنتی بیوتیک کوتریموکسازول بر روی MRSA دارای اثر سینرژیسم است و می­توان از ترکیب این دو عامل ضدباکتربایی به منظور بهبود خاصیت­های ضدمیکروبی استفاده کرد.

کلیدواژه‌ها


عنوان مقاله [English]

Survey the synergistic effect of the cotrimoxazole and Nigella sativa extract on methicillin resistant Staphylococcus aureus bacteria

نویسندگان [English]

  • Pooneh Mohammadpour 1
  • Mohammad Hossein Ahmadi 2
  • Mohammad Niakan 3
  • Fardin Rahimi 3
  • Fatemeh Haghirsadat 4
1 Department of Microbiology, Faculty of Medicine, Shahed University, Tehran, Iran
2 Nanobiotechnology Research Group and Research Laboratory of Shahed University, Tehran, Iran
3 Faculty of New Sciences and Technologies, University of Tehran, Tehran, Iran
4 Department of Advanced Medical Sciences and Technologies, School of Paramedicine, Shahid Sadoughi University of Medical Sciences, Yazd, Iran
چکیده [English]

Background and Objective: Methicillin-resistant Staphylococcus aureus (MRSA) is one of the most important pathogens causes of hospital infections in the world, which has become resistant to many common antibiotics. Increasing antibiotic resistance in bacteria has increased attention to herbal medicines and natural antimicrobial substances. Due to its metabolites such as thymoquinone, Nigella sativa has various effects, including antibacterial properties. This research was conducted to determine the antibacterial effect of Nigella sativa extract and the cotrimoxazole, as well as the combined effect of these two substances on the standard MRSA strain in laboratory conditions.
Materials and Methods: In this study antimicrobial effects of Nigella sativa extract and cotrimoxazole separately and together using the checkerboard method on MRSA (ATCC33591) standard strain were investigated by microdilution method and their minimum growth inhibitory concentration (MIC) were determined.
Results: Cotrimoxazole antibiotic at MIC of 5 μg/ml and Nigella sativa extract at 4.687 mg/ml prevented the growth of the target bacteria. When combining both of them were tested, the MIC concentration for both extract and antibiotic combinations was significantly reduced. These values ​​were reduced to 0.292 mg/ml for the extract and 2 μg/ml for the antibiotic.
Conclusion: According to the obtained results, the antibacterial activity of Nigella sativa ethanolic extract and cotrimoxazole have a synergistic effect on MRSA. Thus, we can use the combination both of antibacterial agents for improving the antimicrobial effect.

کلیدواژه‌ها [English]

  • Methicillin resistant Staphylococcus aureus
  • Nigella sativa
  • Cotrimoxazole
  • Antibacterial activity
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