An endogenous element-label plus exogenous element-tag strategy was proposed for inductively coupled plasma mass spectrometry ( ICP-MS) to screen and discriminate a family of ultratrace but biological important biomolecules. The feasibility of this novel idea has been demonstrated when setting seleno ( SeCys) and Se-containing ( SeMet) proteins ( peptides) as an example. Se-label naturally occurring in the biomole-cules acts an identifier for picking them up out of large amount of various coexisting proteins ( peptides) , and CH3 Hg-tag that can bind to SeCys but not SeMet fulfills the task of discriminating seleno and Se-containing ones based on the Se and Hg signals on ICP-MS. After confirmed using SeCys and GPx1, the Se-Hg dual-element labeling strategy together with ICP-MS was applied to screen and discriminate seleno and Se-contai-ning proteins ( peptides) in the water-soluble extracts of Se-enriched yeast, and seven selenoproteins ( pep-tides) were detected with both 202 Hg and 82 Se signals out of fifteen Se-containing species using RPLC/ICP-MS, providing valuable information for further identification using a high-resolution structure-selective mass spectrometer. This endogenous element-label plus exogenous element-tag dual-element approach implies that ICP-MS is not only able to quantify targeted proteins ( peptides) but also helpful to recognize targeted proteins during a discovery-based proteomic study.

Objective To analysis the occurrence status of breast disease in married women in Tangshan area,and to provide basis for early prevention of breast cancer in this region.Methods 773 married women in Tangshan area were given mammography examination.The tissue biopsy or surgical treatment was recommended for patients with above grade 3 of breast imaging reporting and data system (BI-RADS) classification to obtain pathological diagnosis.Results In 773 women,482 cases (62.35 ％) were diagnosed as BI-RADS grade 2 or below,256 cases (33.12 ％) were BI-RADS grade 3,33 cases (4.27 ％) were BI-RADS grade 4,2 cases (0.26 ％) were BI-RADS grade 5.The distribution of each BI-RADS grade among different age group was statistically significant (x2 =17.90,P ＜ 0.001),35 cases got pathological diagnosis by biopsy or surgical treatment,including 30 cases of mammary gland hyperplasia,3 cases of breast fibroadenoma,and 2 cases of breast cancer.Conclusion Women's mammography screening is important for the prevention and early detection of mammary gland diseases.

Objective To explore the diagnostic value of tumor markers of CEA,CA153,TPS,Fer and CYFRA21-1 level in postoperative metastasis of breast cancer.Methods After 3-year follow-up for 578 patients with primary breast cancer from 2012 to 2014,we chose 42 patients with metastasis as metastasis group,and another 42 cases without as non-metastasis group.Level of CEA,CA153,TPS,Fer and CYFRA21-1 was detected using chemiluminescence and the difference of CEA,CA153,TPS,Fer and CYFRA21-1 level in 2 groups was compared.Pearson correlation test analysis and ROC curve test were performed for data analysis.Results Serum CEA,CA153,TPS,Fer and CYFRA21-1 levelq6.11 ± 1.87)ng/mL,(26.97 ± 9.52) U/mL,(155.95 ± 22.03)U/L,(173.08 ± 19.87)ng/mL and (18.98 ± 7.33)ng/mL respectively increased in metastasis group when compared with those in non-metastasis group (5.33 ± 1.85)ng/mL,(23.34 ± 8.30)U/mL、(133.22 ± 19.09)U/L,(142.29 ± 22.59) ng/mL and (6.76 ± 1.59)ng/mLrespectively and the change of TPS,Fer and CYFRA21-1 was more obvious and the difference was statistically significant (P ＜ 0.05).There was no significant correlation among serum TPS,Fer and CYFRA21-lin metastasis group.The area under ROC curve of CYFRA21-1 was 0.903,followed by Fer (0.849) and TPS (0.791) and in the diagnosis of metastasis of breast cancer,CYFRA21-1 has great diagnostic value.Conclusions The increase of serum TPS,Fer and CYFRA21-1 level is closely associated with postoperative metastasis of breast cancer and CYFRA21-1 has great diagnostic value for monitoring postoperative metastasis of breast cancer.