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Fumarate assay kit

Manufactured by Merck Group
Sourced in United States

The Fumarate Assay Kit is a laboratory tool used to quantify the presence and concentration of fumarate, a key intermediate in the tricarboxylic acid (TCA) cycle. The kit provides a reliable and efficient method for the colorimetric detection and measurement of fumarate levels in various biological samples.

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13 protocols using fumarate assay kit

1

Metabolite Quantification Protocols

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α-KG and 2-HG were measured using the alpha-ketoglutarate colorimetric fluorometric assay kit and D-2-hydroxyglutarate colorimetric assay kit (Cat: K677 and K213, Biovision), respectively. Fumarate and succinate were measured using the respective fumarate assay kit and succinate colorimetric assay kits (Cat: MAK060 and MAK184, Sigma).
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2

Metabolic Profiling of Cells under Hypoxia

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Cells were seeded into six-well plates at a density of 1 × 106 cells in 2 ml RPMI 1640 medium per well and cultured overnight. Cells were then treated with or without 10 μM KU60019 and maintained at 1% O2 for 10–12 h. Glucose consumption, lactate production, ATP production, citrate production, succinate production, fumarate production, and PFKP and CS activity were detected using glucose assay kit (Solarbio® BC2500), LA assay kit (Solarbio® BC2230), ATP content assay kit (Solarbio® BC0300), citric acid (CA) content assay (Solarbio® BC2150), micro mitochondrial citric acid content assay kit (Solarbio® BC2175), succinate colorimetric assay kit (Sigma® MAK184), pyruvate (PA) assay kit (Solarbio® BC2200), acetyl-CoA assay kit (Solarbio® BC0980), fumarate assay kit (Sigma® MAK060), PFKP test kit (Nanjing Jiancheng Bioengineering Institute A129), and citroyl synthetase kit (Nanjing Jiancheng Bioengineering Institute A108) according to instruction of the manufacturers, respectively. All experiments were performed at least three times and the data were normalized by the cell numbers or protein content.
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3

Biomass and Metabolite Quantification

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Biomass concentration was determined both by counting the number of cells per milliliter, as previously described (81 (link)), and by the DCW method after centrifugation (16,000 × g, 5 min, room temperature), two washes with Milli-Q water, and drying under vacuum at 80°C. The concentrations of glucose, glycerol, acetate, butyrate, lactate, pyruvate, acetoin, acetone, ethanol, and butanol were determined based on high-performance liquid chromatography (HPLC), as described by Dusséaux et al. (82 (link)), except that the concentration of H2SO4 was changed to 0.5 mM, as required for mobile phase optimization. The concentrations of formate and fumarate were measured using a formate assay kit (Sigma-Aldrich) and a fumarate assay kit (Sigma-Aldrich), according to the manufacturer’s instructions.
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4

Measuring Metabolic Markers in LO2 Cells

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The AcAc content in LO2 cells was measured by human acetoacetate ELISA Kit (Shanghai J&L Biological, China). The succinate and fumarate content of LO2 cells were measured using the Succinate Assay Kit (Sigma-Aldrich, Saint Louis, MO, USA) and the Fumarate Assay Kit (Sigma-Aldrich, Saint Louis, MO, USA) according to the manufacturer’s instructions.
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5

Fumarate Quantification in Serum

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Fumarate was measured in serum as described in the manufacturer’s protocol using the Fumarate Assay Kit (Sigma-Aldrich, St. Louis, MO). Fumarate contents were normalized to the serum volume (50 μl) used in experiments.
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6

Metabolite Quantification in Knee Joints

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The knee joints, excluding the excessive surrounding tissues, were collected into individual Eppendorf tubes containing 1 mL of sterile PBS, followed by homogenization with TissueLyser II (Qiagen, Hilden, Germany). Afterward, the samples were centrifuged (11,000 rpm for 10 min at 4°C), and the supernatant was processed following metabolite extraction and sample preparation for assessment of metabolite expression. Lactate, fumarate, and malate were measured by using lactate assay kit (catalog no. MAK064; Sigma, Germany), fumarate assay kit (catalog no. MAK060, Sigma, Germany), and malate assay kit (catalog no. MAK067, Sigma, Germany) according to the manufacturer’s instructions.
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7

Quantification of Fumarate Secretion

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Stationary-phase cells were resuspended in M9 with or without 15 mM fumarate. For each time point, samples were collected and centrifuged at high speed, and the supernatant was passed through a 0.2 μm cellulose acetate filter. The filtered supernatants were then quantified using a fumarate assay kit (Sigma-Aldrich). Experiments were performed in triplicate.
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8

Metabolic Profiling of Cells under Hypoxia

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Cells were seeded into six-well plates at a density of 1 × 106 cells in 2 ml RPMI 1640 medium per well and cultured overnight. Cells were then treated with or without 10 μM KU60019 and maintained at 1% O2 for 10–12 h. Glucose consumption, lactate production, ATP production, citrate production, succinate production, fumarate production, and PFKP and CS activity were detected using glucose assay kit (Solarbio® BC2500), LA assay kit (Solarbio® BC2230), ATP content assay kit (Solarbio® BC0300), citric acid (CA) content assay (Solarbio® BC2150), micro mitochondrial citric acid content assay kit (Solarbio® BC2175), succinate colorimetric assay kit (Sigma® MAK184), pyruvate (PA) assay kit (Solarbio® BC2200), acetyl-CoA assay kit (Solarbio® BC0980), fumarate assay kit (Sigma® MAK060), PFKP test kit (Nanjing Jiancheng Bioengineering Institute A129), and citroyl synthetase kit (Nanjing Jiancheng Bioengineering Institute A108) according to instruction of the manufacturers, respectively. All experiments were performed at least three times and the data were normalized by the cell numbers or protein content.
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9

Retinal Fumarate Quantification

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The total fumarate content per retina was measured using the Fumarate Assay Kit (Sigma‐Aldrich) according to the manufacturer's instructions.
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10

Intracellular Metabolite Profiling of ADSCs

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ADSCs (2 × 106 in quantity) transfected with shNC or shBcat1#1 were used for intracellular metabolite concentration measurement. Each metabolite level was determined using the following assay kits: BCAA detection kit (BioVision, K564‐100, α‐ketoglutarate assay kit (Sigma‐Aldrich, MAK054), glutamate assay kit (Sigma‐Aldrich, MAK004), citrate assay kit (Sigma‐Aldrich, MAK057), fumarate assay kit (Sigma‐Aldrich, MAK060), succinate assay kit (Sigma‐Aldrich, MAK184), and malate assay kit (Sigma‐Aldrich, MAK196). BCKA concentration was measured by high‐performance liquid chromatography (HPLC) as previously described.[42] Intracellular metabolite levels were normalized to the ADSCs transfected with shNC.
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