Scholarlink

<p>This study aimed to extract neem leaves components to determine their antimicrobial and antioxidants activities. In addition, their ability to suppress the proliferation of A549 and MCF-7 cells were studied to explore the possible underlying mechanisms involved during such effects. Therefore, the antimicrobial activity of the extract towards some bacterial and fungal strains was investigated using agar well diffusion method, minimum inhibition concentration (MIC) test, peroxidase (POX), and catalase (CAT) activities. Superoxide dismutase (SOD) and catalase (CAT) like activities as well as total antioxidant capacity (TAC) and DPPH scavenging activity were determined. Cells viabilities were also measured by the mitochondrial-dependent reduction of MTT on A549 and MCF-7 cell lines. Cell cycle was flowcytomerically analyzed to detect which phase was arrested. Quantitative real-time PCR (RT-PCR) was done to assess the changes in apoptotic and anti-apoptotic genes. Results showed that, neem leaves extract was more effective towards Gram-negative bacteria (<i>E. aerogenes</i> and <i>E. coli</i>) than that of Gram-positive type (<i>B. cereus</i> and <i>S. epidermidis</i>). Also, the extract has a high antioxidant activity compared to that of the ascorbic acid (DPPH IC<sub>50</sub> was 0.22 and 0.51&#xa0;mg/ml for extract and ascorbic acid, respectively). Cytotoxicity assays confirm that the extract is able to suppress the proliferation of cell lines in a dose-dependent manner with IC<sub>50</sub> of 128.1 and 55.7&#xa0;µg/ml for A549 and MCF-7, respectively. The extract promotes arrest of cell cycle at G0, inhibited the anti-apoptotic genes and stimulated the pro-apoptotic ones. In conclusion, neem leaves extract could have promising roles in pharmaceutical and medical applications.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Antioxidant, antimicrobial, and apoptosis-related activities of Azadirachta indica (Neem) leaf extract in MCF-7 and A549 cell lines

  • 期刊论文

  • 出版模式：

    开放获取

  • 发表日期：

    2026年4月26日

查看全文
  • Elshahat A. Toson,
  • Mohammed Marzouk,
  • Norhan A. Rezk,
  • Sami Rabei,
  • Rasha F. Zahran

摘要

This study aimed to extract neem leaves components to determine their antimicrobial and antioxidants activities. In addition, their ability to suppress the proliferation of A549 and MCF-7 cells were studied to explore the possible underlying mechanisms involved during such effects. Therefore, the antimicrobial activity of the extract towards some bacterial and fungal strains was investigated using agar well diffusion method, minimum inhibition concentration (MIC) test, peroxidase (POX), and catalase (CAT) activities. Superoxide dismutase (SOD) and catalase (CAT) like activities as well as total antioxidant capacity (TAC) and DPPH scavenging activity were determined. Cells viabilities were also measured by the mitochondrial-dependent reduction of MTT on A549 and MCF-7 cell lines. Cell cycle was flowcytomerically analyzed to detect which phase was arrested. Quantitative real-time PCR (RT-PCR) was done to assess the changes in apoptotic and anti-apoptotic genes. Results showed that, neem leaves extract was more effective towards Gram-negative bacteria (E. aerogenes and E. coli) than that of Gram-positive type (B. cereus and S. epidermidis). Also, the extract has a high antioxidant activity compared to that of the ascorbic acid (DPPH IC50 was 0.22 and 0.51 mg/ml for extract and ascorbic acid, respectively). Cytotoxicity assays confirm that the extract is able to suppress the proliferation of cell lines in a dose-dependent manner with IC50 of 128.1 and 55.7 µg/ml for A549 and MCF-7, respectively. The extract promotes arrest of cell cycle at G0, inhibited the anti-apoptotic genes and stimulated the pro-apoptotic ones. In conclusion, neem leaves extract could have promising roles in pharmaceutical and medical applications.