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The Inhibitory Effects of Intestine-oriented Lactobacillus sp. KP-3 on the Accumulation of Heavy Metals in Sprague Dawley rats

Sprague Dawley 쥐에서 장내 유래 Lactobacillus sp. KP-3의 중금속 축적 저해 효과

Kim, Shin Yeon;Kim, Hyun Pyo
김신연;김현표

  • Received : 2014.11.17
  • Accepted : 2015.02.25
  • Published : 2015.02.28

Abstract

To investigate the effect of lactic acid bacteria on the heavy metal adsorption from internal organs and blood, lactic acid bacteria were isolated from human feces. Some strains resistant to heavy metals were selected by incubation in agar media containing each of chrome and cadmium salts. Among them, a strain named KP-3 was ultimately chosen due to its higher growth rate in selective broth medium containing the heavy metals at the concentration of 0.01%. The strain was identified as Lactobacillus sp. based on its morphological, cultural and physiological characteristics. For evaluating the ability to prevent accumulation of heavy metals by selected Lactobacillus sp. strain in vivo, Sprague Dawley rats were fed with heavy metal salts (cadmium, chrome and lead) with or without cultured whole cells for 7 days. The amounts of heavy metals accumulated in liver, kidney and blood were analyzed. As a result, chrome was accumulated to kidney mostly, and lead was frequently found in liver and kidney. Experimental group (rats fed with lactic acid bacteria) showed less accumulation of heavy metal than control group (rats fed with saline solution). The inhibition rates of heavy metal accumulation were calculated to 41.8% (Cd), 33.4% (Cr) and 44.2% (Pb). Especially, feeding lactic acid bacteria strongly reduced accumulation of cadmium in blood. The results showed that feeding Lactobacillus sp. KP-3 could prevent the bioaccumulation of heavy metals in the living body.

Keywords

Accumulation;heavy metals;lactic acid bacteria;Sprague Dawley rats

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