Molecular Docking of Phytochemicals Involved in Apoptotic Pathway and Their Interactions with CASP3, CASP9, and BAX

Madiha Younas1, Muhammad Zubair2, Muhammad Yousaf Shani3

  • 1College of Agricultural Engineering and Food Science, Shandong University of Technology, Zibo 255000, China.

Insights

Green-synthesized nanoparticles and phytochemicals show promise for liver cancer therapy. They significantly increase apoptosis-related gene expression, offering a new therapeutic strategy.

Area of Science:

  • Biochemistry
  • Nanotechnology
  • Oncology

Background:

  • Liver cancer is a major global health concern, necessitating novel therapeutic approaches.
  • Exploring natural compounds and green synthesis methods offers potential for developing new cancer treatments.

Purpose of the Study:

  • To investigate the in silico apoptosis-modulating effects of green-synthesized plant extract components on liver cancer cells.
  • To evaluate the potential of green nanotechnology in developing novel liver cancer therapeutics.

Main Methods:

  • In silico analysis of Caspase-3 (CASP3), Caspase-9 (CASP9), and BCL-2-associated X protein (BAX) genes.
  • Bioinformatics tools and gene expression datasets were used to assess phytochemical effects on the apoptotic pathway.
  • Structure-based molecular docking was employed to determine binding affinities of phytochemicals to target proteins.

Main Results:

  • Green-synthesized silver nanoparticles (AgNPs) at 50 µg/mL increased mRNA expression of CASP3, CASP9, and BAX by approximately 4-fold compared to chemically synthesized AgNPs.
  • Rutin exhibited the highest binding affinities to Caspase-3, Caspase-9, and BAX, with ΔG values of -9.3, -9.1, and -9.0 kcal/mol, respectively.
  • Phytochemicals demonstrated pro-apoptotic activity, providing mechanistic insights into their cytotoxicity.

Conclusions:

  • The study highlights the potential of green nanotechnology and phytochemicals as therapeutic strategies for liver cancer.
  • Findings offer new insights into the molecular mechanisms underlying the cytotoxicity of phytochemicals in liver cancer cells.
  • Green-synthesized nanoparticles show promise for enhancing the efficacy of apoptosis induction in liver cancer treatment.

Related Concept Videos

The Intrinsic Apoptotic Pathway01:31

The Intrinsic Apoptotic Pathway

Internal cellular stress, such as cellular injury or hypoxia, triggers intrinsic apoptosis. The B-cell lymphoma 2 (Bcl-2) family of proteins are the primary regulators of the intrinsic apoptotic pathway. For example, during DNA damage, checkpoint proteins, such as Ataxia Telangiectasia Mutated (ATM protein) and Checkpoints Factor-2 (Chk2) proteins, are activated. These proteins phosphorylate p53 which further activates pro-apoptotic proteins, such as Bax, Bak, PUMA, and Noxa, and inhibits...
Cellular Injury V: Apoptosis and Autophagy01:22

Cellular Injury V: Apoptosis and Autophagy

Cells respond to damage and stress through highly coordinated processes that decide whether they survive or undergo controlled self-destruction. Two major pathways involved in this regulation are apoptosis, a type of programmed cell death, and autophagy, a survival mechanism that helps cells adapt to adverse conditions.ApoptosisApoptosis removes aged or injured cells to maintain tissue balance. During this process, the cell shrinks, chromatin condenses and fragments, and membrane-bound...
The Extrinsic Apoptotic Pathway01:17

The Extrinsic Apoptotic Pathway

The extrinsic apoptotic pathway is initiated when extracellular death-inducing signals, such as specific cytokines, activate the death receptors expressed on the cell surface. The immune cells involved in this pathway are natural killer cells (NK cells) and cytotoxic T-lymphocytes. NK cells are critical in innate immune response, while cytotoxic T-lymphocytes are associated with adaptive immune response. These cells recognize specific receptors expressed on the altered cells and activate...
Caspases01:24

Caspases

Caspase, a family of cysteine proteases, serve as effectors in apoptosis. The ced3 gene in C.elegans was first identified to be involved in apoptosis. This gene encodes the ced-3 caspase that is similar to the interleukin-1-beta converting enzyme or ICE in mammals. In addition to apoptosis, caspases also function in the inflammatory response. Inflammatory caspases are essential in activating pro-inflammatory cytokines that recruit immune cells and block the replication of pathogens inside cells.
Apoptosis01:30

Apoptosis

Apoptosis is a combination of two Greek words, 'apo' and 'ptosis,' meaning separation and falling off, respectively. Hippocrates used this word to describe gangrene, which was caused due to bandaging of fractured bones. Apoptosis was distinguished from necrosis in 1970 when John Kerr reported observations of morphological changes occurring during apoptosis. During one experiment, he observed that the disruption of blood supply to the liver tissue resulted in a size reduction of the tissue.
Phagocytosis of Apoptotic Cells01:17

Phagocytosis of Apoptotic Cells

Cells undergoing apoptosis form apoptotic bodies that must be removed immediately to prevent inflammation, autoimmune diseases, and necrosis. Phagocytosis is carried out by professional phagocytes such as macrophages or  immature dendritic cells. Non-professional phagocytes such as  epithelial cells and fibroblasts also take part in this process; however, they are not as effective as professional phagocytes. 
Normal cells contain receptors that prevent them from being recognized by phagocytes.