Related Experiment Video

Updated: Jun 25, 2026

Evaluation of Caspase Activation to Assess Innate Immune Cell Death
10:23

Evaluation of Caspase Activation to Assess Innate Immune Cell Death

Published on: January 20, 2023

[Experimental study of simvastatin induced apoptosis of K562 cells by caspase-12 activation]

Guo-qiang Xu1, Ze-yan Pu, Hua Liu

  • 1Clinical Laboratory Department, Sichuan Academy Medical Sciences and Sichuan Provincial People's Hospital, Chengdu 610072, China.

Sichuan Da Xue Xue Bao. Yi Xue Ban = Journal of Sichuan University. Medical Science Edition
|March 4, 2009
PubMed
Abstract

Insights

Simvastatin induces apoptosis in K562 cells by activating Caspase-12. This study reveals Caspase-12 as a key pathway in simvastatin-mediated apoptosis, highlighting its role in cancer cell death.

Area of Science:

  • Cell Biology
  • Biochemistry
  • Pharmacology

Background:

  • K562 cells are a human chronic myeloid leukemia cell line.
  • Simvastatin is a statin drug used to lower cholesterol.
  • Apoptosis is programmed cell death, crucial in cancer therapy.

Purpose of the Study:

  • To investigate the apoptotic effects of simvastatin on K562 cells.
  • To determine the role of Caspase-12 activation in simvastatin-induced apoptosis.

Main Methods:

  • K562 cells were treated with varying concentrations of simvastatin.
  • Apoptosis was assessed using Hoechst staining, flow cytometry (Annexin V-FITC/PI), and caspase activation assays.
  • Intracellular calcium levels, and mRNA/protein expression of GRP78, Calpain, and caspases were analyzed.

Main Results:

  • Simvastatin induced morphological changes and increased apoptosis rates in K562 cells.
  • Intracellular calcium concentration and expression of GRP78 and Calpain mRNA were elevated.
  • Cleavage and activation of Caspase-3, -6, -7, -9, and -12 were observed, along with GRP78 protein upregulation.

Conclusions:

  • Simvastatin triggers apoptosis in K562 cells.
  • Caspase-12 activation is a significant pathway mediating simvastatin-induced apoptosis in these cells.

More Related Videos

Identification of Mediators of T-cell Receptor Signaling via the Screening of Chemical Inhibitor Libraries08:49

Identification of Mediators of T-cell Receptor Signaling via the Screening of Chemical Inhibitor Libraries

Published on: January 22, 2019

Use of a Caspase Multiplexing Assay to Determine Apoptosis in a Hypothalamic Cell Model08:27

Use of a Caspase Multiplexing Assay to Determine Apoptosis in a Hypothalamic Cell Model

Published on: April 16, 2014

Related Concept Videos

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.
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...
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...