Lipoxygenase and Colon Cancer
The enzymes involved in the oxidative metabolism of n-6 polyunsaturated fatty acids, such as lipoxygenase (LOX) and cyclooxygenase (COX), are significant in the pathogenesis of colorectal cancer. The aim of this study is to estimate the effectiveness and partial purification of LOX and measure gamma...
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| Autores principales: | , |
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| Formato: | Capítulo de libro |
| Lenguaje: | inglés |
| Publicado: |
IntechOpen
2021
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| Materias: | |
| Acceso en línea: | https://www.intechopen.com/chapters/78343 |
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| Sumario: | The enzymes involved in the oxidative metabolism of n-6 polyunsaturated fatty acids, such as lipoxygenase (LOX) and cyclooxygenase (COX), are significant in the pathogenesis of colorectal cancer. The aim of this study is to estimate the effectiveness and partial purification of LOX and measure gamma-glutamyl transferase (GGT) activity in the serum of patients with colon cancer in Baghdad. The study included samples from 80 male patients with colon cancer and 50 samples of apparently healthy males (control) as the comparison group. The result displayed a noteworthy increase in lipoxygenase effectiveness (805.0 ± 517.23 IU/L) in the serum of patients with colon cancer (stage pT3) compared with control (114.6 ± 49.77 IU/L). The enzyme was purified by the precipitation of the serum protein using 40% (NH4)2SO4 and then removing the remaining salts by dialysis. The column of gel (Sephadex G.100) was used to separate the enzyme from another protein, in this step a single peak was obtained. The effective part of lipoxygenase is at yield 71.42% and folds 11.033. The ion exchange chromatography (DEAE–CeA50) was used to isolate LOX isoenzyme, and two bands (LOX1 and LOX2) were acquired with different degree of purity 16.372 and 12.16 folds, respectively. The result displayed a noteworthy increase in the GGT activity in patients (58.69 ± 16.94 IU/L) compared with control (12.79 ± 5.68 IU/L) p ≤ 0.0001. The increase in the activity of LOX can be potentially used as a tumor marker for colorectal cancer. |
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| ISBN: | 978-1-83962-335-6 |
| DOI: | 10.5772/intechopen.99638 |