ساخت حامل نانولیفی پلی‌لاکتیک اسید حاوی داروی دگزامتازون

نویسندگان

گروه بیومتریال، دانشکده مهندسی پزشکی، دانشگاه صنعتی امیرکبیر، تهران، ایران

چکیده

دگزامتازون به‌عنوان داروی ضدالتهاب سال‌هاست به شکل‌های مختلف مصرف می‌شود و هنوز یکی از امن‌ترین داروهای گلوکوکورتیکوئیدی برای درمان بیماری‌های مختلف است. به‌سبب وجود طیف گسترده از اثرات جانبی، پیدا کردن یک سامانه رهایشی مناسب برای افزایش اثربخشی و کاهش میزان دوز مصرفی این دارو ضروری است. الکتروریسی یکی از روش‌های ساخت الیاف پلیمری است که به‌دلیل توانایی بارگیری داروها و مواد بیولوژیکی مختلف و کنترل رهایش آنها به‌طور گسترده برای ساخت حامل‌های دارویی مورد استفاده قرار می‌گیرد. در این پژوهش الیاف الکتروریسی شده پلی‌لاکتیک ‌اسید فاقد و حاوی دگزامتازون تهیه شد. برای بررسی تأثیر غلظت پلیمر بر مورفولوژی، خواص مکانیکی الیاف و نمودار رهایش دارو، سه غلظت 10، 14 و 18 درصد وزنی/حجمی پلیمر تهیه شد. به نمونه‌ها پنج درصد وزنی/حجمی دگزامتازون اضافه شد. تصاویر میکروسکوپی الکترونی روبشی برای به‌دست آوردن میانگین قطر الیاف و میانگین مساحت حفره‌ها در هر نمونه بررسی شد. در نمونه‌های فاقد دارو میانگین قطر الیاف حاوی 10 تا 18 درصد وزنی، 63/21 درصد افزایش یافت. در نمونه‌های حاوی دارو میانگین قطر الیاف از نمونه 10 تا 18 درصد، 51/19 درصد افزایش یافت. خواص مکانیکی پلیمر مورد بررسی قرار گرفت. مدول الاستیک از نمونه 10 درصد تا نمونه 18 درصد، 81/34 درصد افزایش یافت. افزایش 68/021 درصد استحکام نهایی از نمونه 18 درصد نسبت به نمونه 10 درصد دیده شد. رهایش دارو برای نمونه‌های الکتروریسی تا هفت روز انجام شد. در نمونه‌های 10 و 14 درصد رهایش خطی مشاهده شد. مدل رهایش دارو از نمونه‌ها درجه صفر بود که با توجه به اینکه این مدل رهایش دارو در کاربردهای مختلف دگزامتازون حائز اهمیت است، سامانه‌های طراحی شده می‌توانند برای کاربردهای مختلف دگزامتازون مفید باشند. بیشترین سرعت رهایش دارو مربوط به نمونه 14 درصد بود (0/044 بر ساعت).

کلیدواژه‌ها

عنوان مقاله [English]

Fabrication of Poly (Lactic Acid) Nanofiber Carrier Loaded with Dexamethasone Drug

نویسندگان [English]

  • S. Torabi
  • S. Khorshidi
  • A. Karkhaneh
Biomaterial Group, Biomedical Engineering Faculty, Amirkabir University of Technology, Tehran, Iran.
چکیده [English]

For many years, dexamethasone has been used as an anti-inflammatory drug and is still one of the safest glucocorticoids for treating various diseases. Due to the wide range of the side effects of this drug, it is essential to find a suitable delivering system for reduction in dosage with increased effectiveness. Electrospinning is one of the fiber fabrication methods which is widely used to develop drug carriers due to its ability to load various drugs and biological components and control their release. In this research, neat poly (lactic acid) electrospun fibers and dexamethasone loaded fibers were prepared. To evaluate the effect of polymer concentration on morphology, mechanical properties and drug release profile of the resulting fibers, three polymer concentrations of 10%, 14% and 18% w/v were processed. Thereafter, 5% w/v dexamethasone was added to solutions. The scanning electron microscopy images were investigated to obtain the average diameter of fibers and the average area of pores in each sample. In neat samples, by moving from 10% to 18% composition, the average diameter of the fibers increased by 63.21%. However, in drug loaded samples this increased by 51/19%. After evaluating mechanical properties, an increase of 81/34% in Elastic modulus by moving from 10% to 18% composition was observed. Moreover, the ultimate strength increased by 68/021% when increasing the polymer concentration from 10 to 18%. Drug release from the electrospun samples was continued up to 7 days. Linear release was observed in 10% and 14% compositions. The drug release pattern of these samples was of zero order. Considering the importance of zero order release in different applications of dexamethasone, these delivering systems could be useful. The maximum drug release rate belonged to 14% composition (0.044 1/h).

کلیدواژه‌ها [English]

  • Drug delivery
  • Dexamethasone
  • Poly (lactic acid)
  • electrospinning
  • Neat fibers and drug loaded fibers
  • mechanical properties

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مواد پیشرفته در مهندسی
دوره 39، شماره 2
شهریور 1399
صفحه 21-34

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