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Journal ArticleDOI
Francesca Doonan, Thomas G. Cotter 
01 Mar 2008-Methods
238 Citations
There is often a continuum of apoptosis and necrosis in response to high and low doses of the same stimulus and features of both apoptosis and necrosis may coexist in the same cell.
We conclude that either necrosis or apoptosis can occur in the same cell type, depending on the trigger, and that, although both pathways perhaps may share some cellular components, signal transduction is different for the two types of cell death.
These results indicate that although other modes of cell death exist, apoptosis is the most efficient and requires lower drug concentrations and fewer numbers of non-repaired dsb to give the same killing effect.
Moreover, several evidence point to severer apoptosis-like cell death in 0.7 mM treatments, involving fastest and severest cell lysis, smallest cell size and wrinkled surface and lowest membrane potential.
Although cell death can occur by apoptosis or necrosis, apoptosis is an energy-requiring process that is genetically regulated.1 Cell death by necrosis involves depletion of cellular ATP stores, cell swelling, and disruption of the cell membrane.
Our results indicate that the variation in apoptosis between drugs that act at the same phase of the cell cycle is negligible.
The overall results demonstrated that apoptosis, which is a carefully regulated process of cell death, may proceed through mechanisms varying according to cell type or apoptosis inducer.
Thus caspase inhibitors prevent the hallmark phenotype of apoptosis without measurably affecting target cell death as evidenced by lysis.
We propose a model of pyroptosis in which cell death can occur independently of cell lysis.
Thus, depending on the method used, the extent of apoptosis determined in the same cell population may vary.

Related Questions

How can apoptosis be used as a targeted mechanism for cancer therapy?5 answersApoptosis, the programmed cell death mechanism, can be used as a targeted mechanism for cancer therapy. It plays a crucial role in maintaining cellular balance and eliminating neoplastic cells. Dysregulation of apoptosis control can lead to cancer cell survival and progression. Therefore, targeting the apoptotic pathway has been extensively studied as a potential drug target in cancer treatment. Phytochemicals (PCs) and plant-based nanoparticles (NPs) have shown efficacy in inducing apoptosis in cancer cells. Additionally, understanding the apoptotic pathways and molecules involved in cancer cells can guide the development of targeted therapies. Various extracts and fractions from plants and marine species have been found to induce apoptosis and inhibit cancer cell growth. Furthermore, apoptotic signaling pathways and mechanisms, along with the interactions among proteins involved, are being explored for targeted therapeutics. Targeting apoptosis in cancer therapy requires a better understanding of the apoptotic process and the identification of potential targets for intervention.
Apoptosis and Breast Cancer?5 answersApoptosis, or programmed cell death, plays a critical role in breast cancer. It is involved in mammary gland development, differentiation, and function, and its dysregulation contributes to the development and progression of breast cancer. Studies have shown that apoptosis is influenced by various factors, including BRCA and p53 mutations, hormones, and growth factors. The level of apoptosis in breast cancer is associated with clinicopathological variables such as tumor size, ER status, proliferative activity, and p53 expression. High levels of apoptosis are linked to aggressive tumor behavior and poor prognosis. Additionally, apoptosis is related to histological features of breast cancer, such as high grade, lack of tubule formation, and dense infiltration of lymphocytes. Understanding the role of apoptosis in breast cancer can lead to improved diagnosis, treatment, and prediction of disease outcome.
What is hemolysis of cells?4 answersHemolysis refers to the breakdown of red blood cells (RBCs), leading to the release of hemoglobin into the blood plasma. It can occur due to various factors such as red cell pathologies, physiological conditions, or pre-analytical causes. The severity of hemolysis can vary based on the characteristics of the red cell, the location of hemolysis, and the interaction with the immune system. Hemolytic events can follow different pathways, but similarities may exist when these pathways overlap. Hemolysis can also influence test results, such as the count of nucleated red blood cells (NRBCs). In the context of packed red blood cells (pRBCs) used for transfusion, hemolysis is an important quality parameter that should not exceed 1% at the end of storage to ensure transfusion effectiveness and prevent adverse reactions.
What is Apoptosis?5 answersApoptosis is a programmed and controlled form of cell death that plays a role in the regulation of animal cell populations and is involved in cell turnover in healthy adult tissues. It is characterized by morphological and biochemical changes in the cell, including nuclear and cytoplasmic condensation and fragmentation. These apoptotic bodies are either shed from surfaces or taken up by other cells and degraded by lysosomal enzymes. Apoptosis is implicated in various physiological processes such as morphogenesis, homeostasis, and differentiation, and is also responsible for tissue loss and cell eradication in diseases like neoplasias and cancers. It is a constitutive suicide program expressed in most cells and can be triggered by various signals. Dysregulation of apoptosis can contribute to human diseases, and understanding its signaling pathways may lead to therapeutic interventions.
How long does cell apoptosis take?10 answers
What is apoptosis in cattle?10 answers

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