Crustacean Immunity

Effect of Mushroom Beta Glucan (MBG) on Immune and Haemocyte Response in Pacific White Shrimp (Litopenaeus vannamei)

“…However, after 14 days, the proportions of haemocytes did not change, indicating an enhancement of immune function from baseline without bias towards a specific function. At 28 days, 0.05% treated group showed an increase in the proportion of semi-granular cells, as these cells are the most sensitive and reactive of the three haemocytes [33]. In another words, semi-granular cells act as the primary immune activator of the Pacific white shrimps with their high levels of granules, enzymes and proteins.…”

“…Granular cells have the largest volume, smallest nucleus and largest granules of the three types of cells [6,7,23,32]. Of the three, semi-granular cells are the most unstable and sensitive haemocytes, which frequently degranulate after being stimulated by foreign particles such as LPS and β-glucan, resulting in cell breakdown if more seriously [7,33,34].…”

Two C-type lectins from shrimp Litopenaeus vannamei that might be involved in immune response against bacteria and virus

“…As hepatopancreas was regarded as one of the most important tissues involved in the innate immune defense of shrimp [49], the expression pattern proved that C-type lectins played an important role in the immune defense. While in the hemocytes, which were also believed to play a central role in innate immunity of invertebrates [50], LvLectin-1 and LvLectin-2 mRNA expression was relatively low. However, after the shrimp was challenged by L. anguillarum, LvLectin-1 and LvLectin-2 mRNA expression in hemocytes increased significantly, which suggested that LvLectin-1 and LvLectin-2 in hemocytes could be effectively induced by pathogen stimulation, and high transcription of LvLectin-1 and LvLectin-2 were needed to synthesize and recruit protein for the defense against invading pathogen.…”

Barnacle biology before, during and after settlement and metamorphosis: a study of the interface

“…Because of their role in crosslinking and antimicrobial activity, oxidative chemistries, including ROS, are commonly delivered to wound sites (Winston et al, 1996;Kanost et al, 2004;Labreuche et al, 2006;Cerenius et al, 2010) in many animals, including crustaceans such as crabs and shrimp (Bell and Smith, 1993;Campa-Córdova et al, 2002). It is possible that the developing cuticle undergoes tearing, especially in later stages of metamorphosis, concurrent with substantial changes to the barnacle shape.…”