Effects of dietary organic selenium on immune responses, total selenium accumulation and digestive system health of marron,Cherax cainii(Austin, 2002)

Abstract

A 90-day feeding trial was conducted to determine the effects of dietary organic selenium (OS) supplementation on immune responses, total selenium accumulation in various tissues and the digestive system health of marron Cherax cainii. A group of marron (initial weight 3.65 AE 0.05 g) were fed 0.2 g kg À1 of Sel-Plex â as a source of OS and were compared to a control group of marron that were not fed OS. After 90 days of feeding OS, total haemocyte counts (THC) and the percentages of granular and semigranular cells in marron were significantly higher than in marron fed a control diet. However, dietary OS did not affect the proportion of hyaline cells. The marron fed OS had significantly lower bacteraemia and longer neutral red retention times than the control group. Total selenium levels in the haemolymph, hepatopancreas and muscle tissues of the OS-fed marron group were significantly higher (P < 0.05) than in control diet group. The highest total soluble selenium levels were found in the muscle tissues of OS-fed marron on the final day of the feeding trial. Amylase and protease activity, soluble protein, and numbers of microvilli were significantly higher (P < 0.05) in marron fed OS. These findings demonstrate the benefits of including 0.2 g kg À1 OS in marron diet to enhance immune parameters, increase total selenium accumulation in muscle and improve marron digestive system health.

Selenium Deficiency-Induced Inflammation and Increased Expression of Regulating Inflammatory Cytokines in the Chicken Gastrointestinal Tract

“…These results were consistent with those of previous studies [24,25]. It has been further demonstrated that Se is closely associated with many aspects of physiological function [26], and selenium deficiency facilitates inflammation.…”

“…Numerous studies have demonstrated that Se plays an important role in chemoprevention [2], neurobiology [3], aging [4], immune functions [5], muscle metabolism [6], redox reactions [7], inflammation [8], and many other aspects of health [9]. Se content has been closely associated with dietary Se in birds.…”

Effect of dietary organic selenium on survival, growth, antioxidation, immunity and gene expressions of selenoproteins in abalone Haliotis discus hannai

“…Antioxidant activity in abalone was significantly promoted by low to medium levels of dietary Se but decreased with high levels of dietary Se (Table ). This was consistent with the other findings for Nile tilapia (Lee et al, ), abalone (Wang et al, ), grouper (Lin & Shiau, ), cherry shrimp ( Neocaridina heteropoda ) (Broom, ), river shrimp (Kong et al, ) and marron ( Cherax cainii ) (Nugroho & Fotedar, ). There are a number of possible reasons why excess Se affects the antioxidant capacity of abalone.…”

Deficient and excess dietary selenium levels affect growth performance, blood cells apoptosis and liver HSP70 expression in juvenile yellow catfish Pelteobagrus fulvidraco

“…It is of particular interest that fish fed deficient Se diet had a higher FCR compared to those fed normal Se diet; similar results were also observed in the studies of channel catfish (Wang and Lovell 1997), juvenile grouper (Lin and Shiau 2005) and grass carp(Cenopharyngodon idellus) (Su et al 2007). Su et al (2007) have reported adding Se to feeding diet enhanced the activities of amylase, protease and lipase enzymes, improved digestive system health and contributed to efficient digestion (Nugroho and Fotedar 2015). Although there was no significant difference of FCR between normal dietary Se treatment and excess dietary Se treatment but the juvenile olive flounder (Paralichthys olivaceus) and Acipenser fed high Se diets were observed the histopathological lesions of liver or kidney (Lee et al 2010;Riu et al 2014), owing to the damage of these important organs, a poorer feed efficiency for a long time might occur (Lee et al 2010).…”