Bechshøft, Thea Ø; Jakobsen, Jette; Sonne, Christian; Dietz, Rune (2011): (Table 1) Retinol (vitamin A) and alpha-tocopherol (vitamin E) concentration in polar bear (Ursus maritimus) kidney [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.807262, Supplement to: Bechshøft, TØ et al. (2011): Distribution of vitamins A (retinol) and E (alpha-tocopherol) in polar bear kidney: Implications for biomarker studies. Science of the Total Environment, 409(18), 3508-3511, https://doi.org/10.1016/j.scitotenv.2011.05.036
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Abstract:
Vitamins A and E content of inner organs, among these the kidneys, are increasingly being used as an indicator of adverse effects caused to the organism by e.g. environmental contaminants. In general, only a renal sub sample is used for analyses, and it is thus essential to know which part of the organ to sample in order to get a representative value for this important biomarker. The aim here was to assess the distribution of vitamins A (retinol) and E (alpha-tocopherol) within the polar bear multireniculate kidney (i.e. polar vs. medial position) and also within the cortex vs. medulla of each separate renculi. The results showed no significant difference between the medial and polar renculi with regards to either retinol (p = 0.44) or alpha-tocopherol (p = 0.75). There were, however, significant differences between cortex and medulla for both vitamins (retinol, p = 0.0003; alpha-tocopherol, p<0.0001). The kidney cortex contained higher values of both vitamins than the medulla; on average 29% more retinol and 57% more alpha-tocopherol. Mean concentrations in the medulla was 2.7 mg/kg for retinol and 116 mg/kg for alpha-tocopherol, and in the cortex 3.5 mg/kg for retinol and 182 mg/kg for alpha-tocopherol. These results clearly indicate that one should take precautions when analyzing retinol and alpha-tocopherol in polar bear kidneys. Prior to analysis, the renculi should be separated into medulla and cortex. The results indicated no significant differences between renculi from different parts of the kidney.
Project(s):
Coverage:
Latitude: 77.480000 * Longitude: -69.330000
Date/Time Start: 2009-02-01T00:00:00 * Date/Time End: 2009-02-01T00:00:00
Event(s):
Comment:
The kidney of the male polar bear weighed 599.6 g in total and consisted of 47 separate renculi. Ten renculi (7 polar, 3 medial) were divided into cortex and medulla (excl. papilla), which were then analyzed separately for vitamins A (retinol) and E (a-tocopherol) content. The values for polar and medial renculi vitamin concentrations are based on an average of the values found for medulla and cortex in each renculi.
Data extracted in the frame of a joint ICSTI/PANGAEA IPY effort, see http://doi.pangaea.de/10.1594/PANGAEA.150150
Parameter(s):
| # | Name | Short Name | Unit | Principal Investigator | Method/Device | Comment |
|---|---|---|---|---|---|---|
| 1 | Position | Position | Bechshøft, Thea Ø | in kidney; of relief | ||
| 2 | Retinol | Retinol | µg/g | Bechshøft, Thea Ø | High Performance Liquid Chromatography (HPLC) | mean |
| 3 | Standard deviation | Std dev | ± | Bechshøft, Thea Ø | High Performance Liquid Chromatography (HPLC) | Retinol |
| 4 | Retinol | Retinol | µg/g | Bechshøft, Thea Ø | High Performance Liquid Chromatography (HPLC) | min |
| 5 | Retinol | Retinol | µg/g | Bechshøft, Thea Ø | High Performance Liquid Chromatography (HPLC) | max |
| 6 | alpha-Tocopherol | a-Tocopherol | µg/g | Bechshøft, Thea Ø | High Performance Liquid Chromatography (HPLC) | mean |
| 7 | Standard deviation | Std dev | ± | Bechshøft, Thea Ø | High Performance Liquid Chromatography (HPLC) | a-Tocopherol |
| 8 | alpha-Tocopherol | a-Tocopherol | µg/g | Bechshøft, Thea Ø | High Performance Liquid Chromatography (HPLC) | min |
| 9 | alpha-Tocopherol | a-Tocopherol | µg/g | Bechshøft, Thea Ø | High Performance Liquid Chromatography (HPLC) | max |
| 10 | Sample amount | N | # | Bechshøft, Thea Ø | renculi |
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
40 data points