Cell apoptosis, autophagy and necroptosis in osteosarcoma treatment

Jing Li1,2, Zuozhang Yang1, Yi Li3

  • 1Bone and Soft Tissue Tumors Research Center of Yunnan Province, Department of Orthopaedics, The Third Affiliated Hospital of Kunming Medical University (Tumor Hospital of Yunnan Province), Kunming, Yunnan, China.

Oncotarget
|March 24, 2016
PubMed

Insights

Chemoresistance in osteosarcoma (bone cancer) is a major challenge. This study reviews novel agents targeting cell death pathways like apoptosis, autophagy, and necroptosis to overcome this resistance in pediatric patients.

Area of Science:

  • Oncology
  • Molecular Biology
  • Biochemistry

Background:

  • Osteosarcoma is the most common primary bone tumor in children and adolescents.
  • Current combined therapies (surgery, chemotherapy) improve survival but face chemoresistance.
  • Understanding cell death mechanisms is crucial for effective osteosarcoma treatment.

Purpose of the Study:

  • To review novel compounds, miRNAs, and proteins targeting cell death pathways in osteosarcoma.
  • To summarize how these agents regulate apoptosis, autophagy, and necroptosis.
  • To discuss the role of these agents in overcoming chemotherapy resistance.

Main Methods:

  • Literature review of studies on osteosarcoma cell death pathways.
  • Analysis of novel agents (compounds, miRNAs, proteins) affecting apoptosis, autophagy, and necroptosis.
  • Synthesis of current knowledge on chemoresistance mechanisms and potential therapeutic targets.

Main Results:

  • Various novel agents modulate apoptotic, autophagic, and necroptotic pathways in osteosarcoma cells.
  • Specific miRNAs and compounds show promise in sensitizing osteosarcoma to chemotherapy.
  • Proteins involved in cell death signaling are potential targets for overcoming drug resistance.

Conclusions:

  • Targeting apoptosis, autophagy, and necroptosis offers promising strategies to combat osteosarcoma chemoresistance.
  • Further research into novel agents and their mechanisms is essential for developing improved therapies.
  • Personalized treatment approaches based on molecular targets may enhance patient outcomes.

Related Concept Videos

Autophagic Cell Death01:18

Autophagic Cell Death

Christian de Duve discovered “autophagy,” a process in which cellular components are engulfed by membrane-bound organelles called autophagosomes. The autophagosomes then fuse with lysosomes to digest the enclosed contents. Autophagy is generally activated in cells to prevent cell death. However, cell death is triggered when the damage is beyond repair.
Autophagy and Apoptosis
Autophagy can activate apoptosis. In normal conditions, the autophagy activating protein Beclin-1 and...
5.0K
Overview of Cell Death01:30

Overview of Cell Death

Cell death is an essential process where the body gets rid of old or damaged cells. Cell proliferation and death need to be balanced, as an imbalance between the two may lead to cancer or autoimmune diseases.
Cell death was observed in the early 19th century, but there was no experimental evidence to prove it. In 1842, Carl Vogt first discovered cell death in a metamorphic toad; however, it was not termed ‘cell death.’ Scientists discovered different cell death pathways only in the...
11.0K
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...
16.7K
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...
5.5K
Necrosis01:16

Necrosis

Necrosis is considered as an “accidental” or unexpected form of cell death that ends in cell lysis. The first noticeable mention of “necrosis” was in 1859 when Rudolf Virchow used this term to describe advanced tissue breakdown in his compilation titled “Cell Pathology”.
Morphological Manifestations of Necrosis
Necrotic cells show different types of morphological appearance depending on the type of tissue and infection. In coagulative necrosis, cells become...
7.2K
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...
9.1K