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BACKGROUND It is the hope of investigators and patients alike that in future the isolation of pluripotent human stem cells will allow the establishment of therapeutic concepts for a wide variety of diseases. A major aim in this respect is the identification of new sources for pluripotent stem cells. Oct-4 is a marker for pluripotent human stem cells so far(More)
The L10P single nucleotide polymorphism (SNP) is located in the signal sequence of the transforming growth factor β1 (TGFβ1) gene. The proline-encoding (Pro-) allele of this SNP has been associated with an increased breast cancer risk, which has been attributed to the elevated secretion of this TGFβ1 variant observed in vitro and in male subjects. Here we(More)
PURPOSE Insulin-like growth factors (IGFs) are potent mitogens for breast cancer cells in vitro, and elevated IGF-I serum levels are a risk factor for breast malignancies. This study evaluated IGF-I and IGF-II serum levels in healthy women and in patients with benign and malignant breast lesions and correlated them with tumor size. EXPERIMENTAL DESIGN(More)
OBJECTIVE The purpose of this study was to determine whether human amniotic fluid contains cells that harbor the potential to differentiate into neurogenic cells. STUDY DESIGN Amniotic fluid cells (uncultivated or cultivated in standard or in neurogenic differentiation medium) were analyzed for morphologic neurogenic differentiation and for expression of(More)
Tissue remodeling is a key element in the local invasion and metastasis of malignant breast tumors. The degradation of extracellular matrix that is associated with this process is thought to be mediated by a number of Zn2+-dependent matrix metalloproteinases (MMPs). In most cases these enzymes are not produced by the malignant epithelium itself but by(More)
The mammary mouse tumor virus (MMTV) has been related to human breast cancer in previous studies, but these have yielded contradictory results. An MMTV env gene-like sequence was detectable in a relatively high proportion (38%) of human breast cancer tissues. The aim of this study was to determine the proportion of this 660 bp MMTV env gene-like sequence in(More)
Breast cancer is one of the most frequent malignancies affecting women. The human breast cancer gene 1 (BRCA1) gene is mutated in a distinct proportion of hereditary breast and ovarian cancers. Tumourigenesis in individuals with germline BRCA1 mutations requires somatic inactivation of the remaining wild-type allelle. Although, this evidence supports a role(More)
PURPOSE The interleukin 1 (IL-1) system plays an important role in human pathology and is involved in the local control of malignant disease. However, little is known about its expression in breast cancer and its correlation with prognostic parameters such as receptor status and grading. EXPERIMENTAL DESIGN The expression of IL-1alpha and other IL-1(More)
Recently, amniotic fluid was suggested as a new source for stem-cell research and tissue engineering approaches. In order to enable isolation of stem cells and establishment of lines of such cells with an undifferentiated phenotype we have introduced green fluorescent protein regulated by the promoters of the stem cell-specific genes, Oct-4 or Rex-1, into(More)