Zhengdeng Lei, PhD

Zhengdeng Lei, PhD

2009 - Present Research Fellow at Duke-NUS, Singapore
2007 - 2009 High Throughput Computational Analyst, Memorial Sloan-Kettering Cancer Center, New York
2003 - 2007 PhD, Bioinformatics, University of Illinois at Chicago

Thursday, March 8, 2012

BC dataset

Search capecitabine  in GEO

http://www.ncbi.nlm.nih.gov/geo/query/acc.cgi?acc=GSE22358

http://www.ncbi.nlm.nih.gov/geo/query/acc.cgi?acc=GSE18728

http://www.ncbi.nlm.nih.gov/geo/query/acc.cgi?acc=GSE23988

http://www.ncbi.nlm.nih.gov/geo/query/acc.cgi?acc=GSE20271

capecitabine -- metabolic

http://www.medscape.com/viewarticle/712105


The study authors found that the addition of capecitabine seemed more effective in estrogen-receptor (ER)-positive than in ER-negative breast cancers, Dr. O'Regan points out.
"The positive findings in the capecitabine group could be explained by the fact that over three quarters of patients had ER-positive cancers," she writes. "There is currently no plausible mechanism to explain why capecitabine would be more effective in ER-positive disease, but this might warrant further study."


Capecitabine in advanced breast cancer: Predictive factors for response.

The only positive correlation to predict response was ER positivity (p = 0.04).



Thymidine phosphorylase expression and benefit from capecitabine in patients with advanced breast cancer.

Sunday, February 12, 2012

limma anova

http://www.statsci.org/smyth/pubs/limma-biocbook-reprint.pdf

http://bioconductor.org/packages/2.6/bioc/vignettes/limma/inst/doc/usersguide.pdf

https://stat.ethz.ch/pipermail/bioconductor/2006-August/013998.html

http://www.bioconductor.org/help/course-materials/2009/BioC2009/labs/limma/limma.pdf

KO <- factor(rep(1:2, each = 3, times = 2))
CELL <- factor(rep(1:2, each = 6))
design <- model.matrix(~KO + CELL)




In R:
> mat <- cbind(c(1,1,1,rep(0,9)),
+ c(0,0,0,1,1,1,rep(0,6)),
+ c(rep(0,6),1,1,1,0,0,0),
+ c(rep(0,9),1,1,1))
> colnames(mat) <- c("nu","nt","tu","tt")

Thursday, February 9, 2012

Solid tumors

Common three subtypes of solid tumors:
Inv, Pro, Meta
BEZ235, Nilotinib, 5-FU