Sáiz M P, Martí M T, Mitjavila M T, Planas J
Department de Bioqumica i Fisiologia, Universitat de Barcelona, Spain.
Biol Trace Elem Res. 1993 Jan;36(1):7-14. doi: 10.1007/BF02783775.
Iron (Fe) absorption by three segments (duodenum, jejunum, and ileum) of the small intestine of chickens was studied by a perfusion technique in vivo in closed circuit using 59Fe Cl3 and was related to the histological characteristics of each segment. The serosal transfers of Fe for the duodenum and jejunum were the same (14%/cm), but significantly different (p < 0.05) from those of the ileum (9%/cm), which may be explained by the morphological and histological properties of the gut of chickens. However, the presence of Fe in blood and in liver was significantly lower after perfusion of the jejunum and ileum than after perfusion of the duodenum. It is concluded that chickens show an early adaptation of small intestine to Fe absorption in response to the considerable loss of Fe suffered during the laying process.
采用闭路循环体内灌注技术，使用59Fe Cl3研究了鸡小肠三个节段（十二指肠、空肠和回肠）对铁（Fe）的吸收情况，并将其与每个节段的组织学特征相关联。十二指肠和空肠的铁浆膜转运相同（14%/cm），但与回肠（9%/cm）的转运有显著差异（p < 0.05），这可能由鸡肠道的形态学和组织学特性来解释。然而，空肠和回肠灌注后血液和肝脏中的铁含量显著低于十二指肠灌注后。得出的结论是，由于产蛋过程中遭受的大量铁损失，鸡的小肠对铁吸收表现出早期适应性。
