Clonogenic Assay Sample Clauses

Clonogenic Assay.Β Clonogenic assay was done by seeding between 800 and 2500 treated cells per well in 6-well plates. Cell number for controls were seeded at 800 cells per well and the cell number increased as the treatment concentration increased to 2500 cells per well. The cells were then left to grow in 2 mL per well complete media in 37 Β°C in 5% CO2 incubator for 10 to 14 days. Media were replaced every 3 days. At 10 to 14 days post treatment (depending on colony formations), the colonies were fixed and stained with 50% methanol (Sigma) and 50% of 1% crystal violet in water (Sigma, UK) and counted for colonies comprising of 50 cells or more. Radionuclide uptake for toxicity studies (trypan blue and clonogenic assays) was expressed as cell-bound activity (Bq/cell) by multiplying factors (radioactivity for toxicity study (MBq/mL) /radioactivity for binding study (MBq/mL) to Bq/cell calculated in Chapter 3.3.3.2 based on their respective cell type and radioactive treatment. Surviving fraction (SF) was calculated based on Xxxxxxx et al. (2006) [165] by determining plating efficiency of each cell type (Equation 3-2) followed by SF calculation (Equation 3-3). Results were expressed as mean and standard deviation (SD) . Equation 3-2 Plating efficiency formula π‘ƒπ‘™π‘Žπ‘‘π‘–π‘›π‘” 𝐸𝑓𝑓𝑖𝑐𝑖𝑒𝑛𝑐𝑦 (𝑃𝐸) = π‘›π‘œ. π‘œπ‘“ π‘π‘œπ‘™π‘œπ‘›π‘–π‘’π‘  π‘“π‘œπ‘Ÿπ‘šπ‘’π‘‘ π‘›π‘œ. π‘œπ‘“ 𝑐𝑒𝑙𝑙𝑠 𝑠𝑒𝑒𝑑𝑒𝑑 π‘₯ 100% Equation 3-3 Surviving fraction formula π‘†π‘’π‘Ÿπ‘£π‘–π‘£π‘–π‘›π‘” π‘“π‘Ÿπ‘Žπ‘π‘‘π‘–π‘œπ‘› (𝑆𝐹) = π‘›π‘œ. π‘œπ‘“ π‘π‘œπ‘™π‘œπ‘›π‘–π‘’π‘  π‘“π‘œπ‘Ÿπ‘šπ‘’π‘‘ π‘Žπ‘“π‘‘π‘’π‘Ÿ π‘‘π‘Ÿπ‘’π‘Žπ‘‘π‘šπ‘’π‘›π‘‘ π‘›π‘œ. π‘œπ‘“ 𝑐𝑒𝑙𝑙𝑠 𝑠𝑒𝑒𝑑𝑒𝑑 π‘₯ 𝑃𝐸
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Related to Clonogenic Assay

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