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Total cholesterol colorimetric assay kit

Manufactured by Abcam
Sourced in United States, Canada

The Total Cholesterol Colorimetric Assay kit is a laboratory tool designed to quantitatively measure the total cholesterol levels in a sample. The kit utilizes a colorimetric reaction to determine the concentration of cholesterol.

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3 protocols using total cholesterol colorimetric assay kit

1

Glucose and Lipid Metabolism Assessment

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At weeks 0, 4, 8, and 11, blood glucose readings were measured after overnight fasting (16 h). Blood was collected from the lateral tail vein and immediately assessed for glucose levels using the Precision Xtra Blood Glucose and Ketone Monitoring System (Abbott Diabetes Care, Alameda, CA, USA).
At week 11, glucose tolerance testing (GTT) was performed. First, baseline fasting glucose levels were taken. Mice were then administered a glucose bolus (2 g/kg body weight) via IP injection. Blood glucose levels were recorded from lateral tail vein 15, 30, 60, and 120 min after the glucose bolus. Area under the curve (AUC) was calculated.
Plasma cholesterol and triglyceride levels were measured enzymatically at the conclusion of the experimental period. Commercially available kits for both cholesterol (Total Cholesterol Colorimetric Assay kit, #K603, BioVision, Milpitas, CA, USA) and triglycerides (LabAssay Triglycerides, #290-63701, Wako Chemicals, Richmond, VA, USA) were used following the manufacturers’ protocols.
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2

Metabolic Characterization of Mouse Model

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Blood glucose readings were measured after overnight fasting (16 h) every four weeks beginning at week 0 of the 12-week treatment period. Blood was collected from the lateral tail vein and immediately assessed for glucose levels using the Precision Xtra Blood Glucose and Ketone Monitoring System (Abbott Diabetes Care).
Glucose tolerance testing (GTT) was performed at week 11. Fasting, baseline glucose readings were taken after which mice were administered a glucose bolus (2 g/kg body weight) via oral gavage. Blood glucose levels were recorded 15, 30, 60, and 120 min after the glucose bolus was given. Area under the curve (AUC) was calculated.
Plasma cholesterol and triglyceride levels were enzymatically determined at the conclusion of the experiment using commercially available kits (LabAssay Triglycerides #290-63701, Wako Chemicals; Total Cholesterol Colorimetric Assay kit, #K603, BioVision). All samples were run in duplicate according to manufacturer’s instructions.
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3

ER Cholesterol Measurement Protocol

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ER cholesterol measurements were performed as described previously.58 (link) Cells were seeded in four 100 mm dishes for each condition at day 0. On day 2, cells were changed to DMEM medium with 5% lipoprotein-deficient serum (LPDS). At Day 3, cells were switched to DMEM medium containing 5% LPDS, 1 μM lovastatin, and 10 μM mevalonate. On day 4, the cells were harvested. A portion of the harvested cells (5% of total) were used for total cellular cholesterol determination. The remaining 95% of the harvested cells were used for ER membrane isolation using the Endoplasmic Reticulum Enrichment Extraction Kit (Novus, NBP2-29482, Centennial, CO). Cholesterol was then extracted from isolated ER membranes, and the amount of total cholesterol was determined using a total cholesterol colorimetric assay kit (Biovision, K603, Milpitas, CA). Cholesterol contents in the ER are expressed as the molar percentage of total cellular cholesterol.
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