We have recently shown that conservation and differentiation of primitive human hematopoietic progenitors in in vitro long-term bone marrow cultures (LTBMC) occurs to a greater extent when hematopoietic cells are grown separated from the stromal layer than when grown in direct contact with the stroma. This finding suggests that hematopoiesis may depend mainly on soluble factors produced by the ...

Solid tumors are composed of two distinct but interdependent compartments: the malignant cells themselves (parenchyma) and the supporting connective tissue (stroma) that they induce and in which they are dispersed. The quantity of stroma is highly variable from tumor to tumor but all solid tumors, regardless of type or cellular origin, require stroma for nutrition and waste disposal if they are...

we report a case of florid polypoid endometriosis presenting with advanced bulky disease in pelvis with serum ca – 125 levels of 7844u/ml. the extent of tumor, ct scan findings, elevated serum ca – 125 levels were suggestive of ovarian malignancy. histopathology demonstrated endometrial glands and stroma. glands were neither crowded nor complex and were separated by a fibromatous stroma that co...

Chronic myelogenous leukemia (CML) is a clonal disorder of the hematopoietic stem cell characterized by the coexistence of Philadelphia-negative (Ph-) with Ph+ progenitors. CML progenitor cells have been shown to be defective in adherence to marrow stroma. The present study investigated at the cytogenetic level marrow-derived CML clonogenic cells generated from the stroma-adherent cell fraction...

We have investigated the three-dimensional (3D) architecture of the thylakoid membranes of Arabidopsis (Arabidopsis thaliana), tobacco (Nicotiana tabacum), and spinach (Spinacia oleracea) with a resolution of approximately 7 nm by electron tomography of high-pressure-frozen/freeze-substituted intact chloroplasts. Higher-plant thylakoids are differentiated into two interconnected and functionall...

PURPOSE Recent studies suggest that tumor microenvironment (stroma) is important in carcinogenesis and progression. We sought to integrate global genomic structural and expressional alterations in prostate cancer epithelium and stroma and their association with clinicopathologic features. EXPERIMENTAL DESIGN We conducted a genome-wide LOH/allelic imbalance (AI) scan of DNA from epithelium and...

PURPOSE Gene targeted lumican-null mutants (lum(tm1sc)/lum(tm1sc)) have cloudy corneas with abnormally thick collagen fibrils. The purpose of the present study was to analyze the loss of transparency quantitatively and to define the associated corneal collagen fibril and stromal defects. METHODS Backscattering of light, a function of corneal haze and opacification, was determined regionally u...