title: Flow cytometry studies on the Macrobrachium rosenbergii hemocytes sub-populations and immune responses to novel pathogen spiroplasma MR-1008.
abstract: Flow cytometry provides rapid and reproducible methods for analyzing crustacean cellular immune responses to pathogens. We used this method to investigate the hemocytes sub-populations of freshwater prawn Macrobrachium rosenbergii and their immune responses to a novel pathogen spiroplasma MR-1008. M. rosenbergii inoculated with 100 μl spiroplasma strain MR-1008 in logarithmic phase (10(8) spiroplasmas ml(-1)) were examined for total hemocytes count (THC) and changes in differential involvement of hemocytes sub-populations during 1-28 d after inoculation. The results showed that THC was dramatically lowered 1 d after inoculation, and it obviously increased at the 5 d after inoculation; thereafter, a high level of THC was maintained to 15 d. Three morphologically distinct hemocytes sub-populations including granular cells (GC), semigranular cells (SGC) and hyaline cells (HC) could be identified by flow cytometry, and the proportions of the 3 kinds of cell categories varied obviously during the infection of spiroplasma suggesting differential involvement according to the pathogen. The flow cytometry used in this study confirmed that the semigranular cells were the main hemocytes involved in the cellular defense against spiroplasma in the M. rosenbergii.
authors: Jiangsu Key Laboratory for Biodiversity & Biotechnology and Jiangsu Key Laboratory for Aquatic Crustacean Diseases, College of Life Sciences, Nanjing Normal University, 1# Wenyuan Road, Nanjing 210046, China.
authors: Jie
authors: J
authors: Du
authors: Huanxi
authors: H
authors: Zhu
authors: Qian
authors: Q
authors: Ren
authors: Peng
authors: P
authors: Liu
authors: Jing
authors: J
authors: Chen
authors: Yunji
authors: Y
authors: Xiu
authors: Wei
authors: W
authors: Yao
authors: Qingguo
authors: Q
authors: Meng
authors: Wei
authors: W
authors: Gu
authors: Wen
authors: W
authors: Wang
mesh_terms: D000818:Animals; D005434:Flow Cytometry / Q000379:methods* / Q000662:veterinary; D006434:Hemocytes / Q000276:immunology; D007111:Immunity, Cellular; D033541:Palaemonidae / Q000276:immunology* / Q000382:microbiology*; D013149:Spiroplasma / Q000276:immunology*