ABSTRACT
Objective To study lobular involution of tissues around breast tumor,and to assess the consistency of lobular involution of tissues from different parts of the breast.Methods 22 patients receiving breast conservation surgery in Breast Surgery Department of Peking Union Medical College Hospital from Dec.1 st,2010to Dec.1 st,2011 were collected.88 pieces of HE staining were measured in terms of lobular area and number of acini per lobular,and lobular involution was evaluated.Bivatiate correlation analysis was applied to explore correlation between lobular area and acini per lobular.ANOVA,crosstabs and reliability analysis were applied to explore involution consistency of different parts of breast (P ＜ 0.05).Results The average area of lobuli was (90 248.5 +56 909.4) μm2 and the number of acini was 25.68 ± 18.86 per lobular.The lobular area and number of acini were correlated with each other significantly(Pearson r =0.78,P ＜ 0.01).Involution status of different parts of breast had good consistency(for lobular area 19 cases showed no difference in ANOVA analysis and for lobular area/number of acini 18 cases showed no difference; Kappa coefficient =0.65; ICC =0.73).Conelusions Lobuli around breast tumor have comparatively poor involution,with big lobuli and large number of acini,which are correlated with each other.Involution status of different parts of a breast has good consistency.Biopsy from one site to evaluate involution extent of the whole breast is practicable.
ABSTRACT
Objective To study the molecular mechanism of medulloblastoma.Methods The cell line with PARP-1 and P53 null mutation was established and characterized.Mouse medulloblastoma cell line derived from PARP-1/P53 double knockout mice was established.We analyzed cell characters after 30 passages,using neuronal cell-specific markers by immunofluorescence.The cells were transfected with pEGFP-C1-Hparp-1 and pEGFP-C1 plasmids,the expression of PARP-1 protein was detected by immunofluorescence stainning and Western blot.Results The cells showed positive immunoactivity for the neuronal-specific markers such as Vimentin,Dcx and ?Ⅲ-Tubulin,and cells were negative for PARP-1 protein.Exogenous PARP-1 expression was visualized by immunofluorescence and Western blot analysis after pEGFP-C1-Hparp-1 transfection.Conclusion Mouse medulloblastoma cell line with defective function for DNA damage recovery has been successfully established,which provides a useful tool for further dissecting the molecular mechanism and pathogenesis of medulloblastoma.