[Study on liver injury of Oncomelania hupensis caused by Eomecon chinanthe sanguinarine].

OBJECTIVE: To analyze the effects of Eomecon chinanthe sanguinarine (SAN) on glucogen, enzyme activity and lipid peroxidation of Oncomelania hupensis liver so as to explore the mechanism of SAN against Oncomelania hupensis. METHODS: SAN was extracted and purified from the dry powder of Eomecon chionantha. Oncomelania hupensis were immersed in 5 mg/L sanguinarine (50 Oncomelania hupensis per 500 ml solution) or clean water at 25 degrees C for 36 h, the livers were isolated from live snails. Total glucogen content, malondialdehyde (MDA) level, activities of alanine aminotransferase (ALT), aspartate aminotransferase (AST), acid phosphatase (ACP), alkaline phosphatase (AKP), superoxide dismutase (SOD), peroxidase (POD) were determined respectively and the data were analyzed by independent t test. RESULTS: The glucogen content of snail livers in the SAN group and the control group were (12.151 +/- 0.204) and (18.113 +/- 0.163) mg/g respectively, the difference between the two groups was significant (P < 0.05); the MDA levels of the two groups were (5.298 +/- 0.441) and (4.351 +/- 0.197) nmol/mgprot respectively, and the difference was not significant (P > 0.05); the activities of ALT, AST, ACP, AKP, SOD in the SAN group were (2.760 +/- 0.076) U/mgprot, (68.723 +/- 2.295) U/mgprot, (407.949 +/-19.868) U/gprot, (191.287 +/- 0.771) U/ gprot and (48.452 +/- 0.193) U/mgprot respectively, the activities of these enzymes in the control group were (1.104 +/- 0.000) U/mgprot, (49.448 +/- 1.626) U/mgprot, (344.475 +/- 30.186) U/gprot, (121.905 +/- 3.127) U/gprot and (38.814 +/- 2.765) U/mgprot respectively, the activities of ALT, AST, ACP, AKP and SOD were significantly increased after immersed in 5 mg/L SAN for 36 h, the differences were significant (All P values < 0.05); yet the difference of POD between the SAN group [(22.170 +/- 0.018) U/mgprot] and the control group [(21.747 +/- 0.264) U/mgprot] was not significant (P > 0.05). CONCLUSION: SAN can destroy liver functions of Oncomelania hupensis through decreasing glucogen content and changing activities of some important enzymes in snail liver.

[Spatial analysis of Oncomelania snail information based on grid data-driven].

OBJECTIVE: To explore the relationship between the Oncomelania snail situation and the distance to the water source, soil humidity, vegetation and water level in flood seasons in the islets of Changsha Section of the Xiang River. METHODS: Combined with the NDVI and soil humidity of islets, the GIS spatial analysis based on grid data-driven was used to analyze the snail situation in Changsha Section of the Xiang River from 2005 to 2009. The relationship between the snail density and the water level in blood seasons was analyzed. RESULTS: In 2005, the snails in Zengpi Islet were mainly distributed at the range of 40-240 m far away from the nearest water source, and the number at the spots with a distance of 60 m was the largest. There was an obvious positive correlation between the snail density and water level in flood seasons. The ranges of the Normalized Difference Vegetation Index and soil humidity of Zengpi Islet in 2005 were 0-0.982 and 0-0.298, respectively and the main vegetation in Changsha Section of the Xiang River were weed and sedge. The map of snail situation by year was drawn according to the standard water level, which reflected the snail situation intuitionistically. CONCLUSIONS: By using spatial analysis based on grid data-driven, the situation of vegetation, soil humidity and snail accurately can be reflected, which can help us to understand the endemic situation timely. Even under the circumstance of human intervention, the water level in flood seasons is still an important factor influencing the change of snail situation.

[Identification of differentially expressed proteins in the liver of Oncomelania snails induced by Eomecon chinanthe sanguinarine].

OBJECTIVE: To identify the differentially expressed proteins in the liver of Oncomelania snails induced by Eomecon chinanthe sanguinarine. METHODS: Sanguinarine was extracted and purified from the dry powder of Eomecon chinanthe. Oncomelania snails were immersed in 5 mg/L sanguinarine (50 Oncomelania snails per 500 ml) or pure water for 36 h (25°C) and the livers were isolated from live snails. Total liver proteins were extracted and separated by two-dimensional gel electrophoresis. Electrophoretogram was analyzed by Image Master 2D 5.0 software. The differentially expressed proteins between sanguinarine group and pure water group were selected and analyzed by matrix-assisted laser desorption/ionization time-of-flight mass spectrometry (MALDI-TOF-MS) and tandem mass spectrometry sequencing of tryptic peptides. RESULTS: In terms of protein spots, 433 ± 14 and 385 ± 12 were observed in sanguinarine group and in water group respectively. The eleven identified differentially expressed proteins included tropomyosin, hypothetical protein XP_533132, actin 87E, keratin 6A, beta-tubulin, mitochondrial inner membrane protein isoform 4, keratin 2, allatostatin precursor, ENSANGP00000020184, actin-3 and ENSANGP00000013943. Among them, hypothetical protein XP_533132 and ENSANGP00000013943 were down-regulated and the other nine proteins were up-regulated in sanguinarine group. CONCLUSION: Sanguinarine could alter the expression of proteins in livers of Oncomelania snails.

[Screening and identification of differentially expressed proteins between adult female and male worms of Schistosoma japonicum].

OBJECTIVE: To screen and identify differentially expressed proteins between adult female and male worms of Schistosoma japonicum(S.japonicum). METHODS: Two rabbits infected with the cercaria were perfused with saline in carotid, and approximately two hundred adult female and two hundred male worms of S.japonicum were collected. Approximately 300 microg soluble and hydrophobic proteins of adult female and male worms of S.japonicum were extracted and then the proteins were separated by two-dimensional gel electrophoresis respectively. The analysis using ImageMaster Platinum 2D 5.0 resulted in differentially expressed proteins between adult female and male worms, which were subjected to matrix-assisted laser desorption/ionization time-of-flight mass spectrometry (MALDI-TOF-MS) and tandem mass spectrometry sequencing of tryptic peptides. RESULTS: There were (255 +/- 10) and (224 +/- 12) spots detected for soluble proteins and (200 +/- 11) and (132 +/- 8) spots for hydrophobic proteins from adult female and male worms respectively. Six differential proteins were identified, five up-regulated proteins in female worms were thioredoxin, putative ferritin-1 heavy chain, chain B in solution structure of the human ubiquitin-conjugating-enzyme-like protein Mms2-Ubiquitin Complex, heat shock protein 10, cytoplasmic fatty acid binding protein variant H; while only one up-regulated proteins in male worms was identified as 48 kDa histamine receptor subunit peptide 4. CONCLUSION: Several differentially expressed proteins between female and male worms of S. japonicum were recognized through screening and identifying differential proteins between female and male worms of S.japonicum.