The “curse of dimensionality” problem and noise in the data, however, undermines the performance of many algorithms.\n\nMethod: In order to obtain a robust classifier, a novel Additive Nonparametric Cilengitide manufacturer Margin Maximum for Case-Based Reasoning (ANMM4CBR) method is proposed in this article. ANMM4CBR employs a case-based reasoning (CBR) method for classification. CBR is a suitable paradigm for microarray analysis, where the rules that define the domain knowledge are difficult to obtain because usually
only a small number of training samples are available. Moreover, in order to select the most informative genes, we propose to perform feature selection via additively optimizing a nonparametric margin maximum criterion, which is defined based PD0332991 nmr on gene pre-selection and sample clustering. Our feature selection method is very robust to noise in the data.\n\nResults: The effectiveness of our method is demonstrated on both simulated and real data sets. We show that the ANMM4CBR method performs better than some state-of-the-art methods such as support vector machine (SVM) and k nearest neighbor (kNN), especially when the data contains a high level of noise.\n\nAvailability: The source code is attached as an additional file of this paper.”
To evaluate a silk fibroin (SF) biomaterial as a substrate for corneal epithelial cell proliferation, differentiation, and stratification in vitro compared with denuded human amniotic membrane (AM).\n\nMETHODS. Primary human and rabbit corneal epithelial cells and immortalized human corneal limbal epithelial cells were AZD0530 manufacturer cultured on the SF and denuded AM, respectively. The biological
cell behavior, including the morphology, proliferation, differentiation, and stratification, on the two substrates was compared and analyzed.\n\nRESULTS. Corneal epithelial cells can adhere and proliferate on the SF and denuded AM with a cobblestone appearance, abundant microvilli on the surface, and wide connection with the adjacent cells. MTT assay showed that cell proliferation on denuded AM was statistically higher than that on SF at 24 and 72 hours after plating (P = 0.001 and 0.0005, respectively). Expression of Delta Np63a and keratin 3/12 was detected in primary cell cultures on the two substrates with no statistical difference. When cultured at the air-liquid interface for 7 days, cells on SF could form a comparable stratified graft with a 2- to 3-cell layering, which compared similarly to AM cultures.\n\nCONCLUSIONS. SF, a novel biomaterial, could support corneal epithelial cells to proliferate, differentiate, and stratify, retaining the normal characteristic epithelium phenotype. Compared with AM, its unique features, including the transparency, ease of handling, and transfer, and inherent freedom from disease transmission, make it a promising substrate for corneal wound repair and tissue-engineering purposes. (Invest Ophthalmol Vis Sci. 2012;53:4130-4138) DOI:10.1167/iovs.