Significance of Detecting Serum Complement C3 and C4 in Patients with Multiple Myeloma / 中国实验血液学杂志

OBJECTIVE@#To investigate the significance of detecting serum complement C3 and C4 in patients with multiple myeloma (MM) and to explore its correlation with myeloma bone disease (MBD).@*METHODS@#The levels of serum complement C3 and C4 in 69 MM patients and 30 healthy people were examined by scatter nephelometry. The bone density of L1-4 vertebral body, bilateral femoral neck and bilateral hip joints were measured by dual energy bone density meter (DXA).@*RESULTS@#The levels of serum complement C3 and C4 in MM patients significantly increased in comparison with that in healthy people (P＜0.01). The patients in advanced clinical stage exhibited a higher levels of C3 and C4 than those in stable stage (P＜0.01). In addition, the patients with grade C of MBD had a higher levels of serum complement C3 and C4 than those in patients with grade A and B of MBD (P＜0.01). The levels of serum complement C3 and C4 in MM patients negatively correlated with bone density in L1-4 vertebral body, bilateral femoral necks and hip joints. The correlation coefficients were r=-0.938, r=-0.659, r=-0.745, r=-0.748, r=-0.596 in complement C3 and r=-0.908, r=-0.623, r=-0.710, r=-0.714, r=-0.595 in complement C4, respectively.@*CONCLUSION@#The levels of complement C3 and C4 positively correlate with the severity of bone disease and bone density in MM patients, which suggests that complement C3 and C4 plays important roles in the development of MBD. The levels of serum C3 and C4 may be the sensitive biomarkers of MBD.

Effects of Subacute Manganese Exposure through Drinking Water on Blood Indexes in Rats / 环境与健康杂志

Objective To observe the toxic effects of subacute manganese exposure through drinking water on blood system in rats and offer the scientific data for understanding manganese toxicity mechanism.Methods Male SPF SD rats were randomly divided into control group,high-dose and low-dose Mn-exposed group,12 animals in each group.The two Mn-exposed groups were treated with Mn at doses of 0.5,5.0 g/L,through drinking water,for 60 consecutive days.After 60 days of treatment,haemoglobin (Hgb),red blood cells count(RBC),platelet count(PC),white blood cells count(WBC)and differential count(WBC-DC)were examined by blood routine test.The activity of alanine aminotransferase(ALT),aspartate aminotransferase(AST),alkaline phosphatase(ALP),cholinestarase(ChE),monoamine oxidase(MAO),superoxide dismutase(SOD),nitric oxide synthase(NOS)and the level of glutathione(GSH),maleicdialdehyde(MDA)were determined.Results No significant differences of body weigh,Hgb, RBC and WBC were found among the 3 groups.PC and neutrophil(N)percent of WBC were higher,eosinophil(E)percent of WBC was significant lower in high dose and low dose Mn-exposed groups compared with the control group.None of basophil(B)and monocyte(M)was found in 3 groups.Compared with the control group,the activity of ALT,AST,ALP,ChE,NOS and MDA level increased,SOD activity and GSH level decreased significantly in high dose and low dose Mn-exposed groups,and significant doseeffect relationships were seen in the above changes.Conclusion Long term manganese exposure may have some adverse effects on the blood system in rats.