Eric Harris Davidson was a unique and creative intellectual force who grappled with the diversity of developmental processes used by animal embryos and wrestled them into an intelligible set of principles, then spent his life translating these process elements into molecularly definable terms through the architecture of gene regulatory networks. He took speculative risks in his theoretical writ...

Multicellular Tumor Spheroid (MTS) represents a three-dimentional structural form of tumors in laboratory conditions, and it has the characteristics of avascular micrometastases or intervascular spaces of big tumors. Recent studies indicate that extracellular matrix (ECM) proteins play a critical role in tumor metastasis, therefore normal and cancer cells require an ECM for survival, proliferat...

Introduction: There has been a curiosity about the spheroid geometry for PET scanners developments since several years ago, therefore in this study, we are aiming to evaluate the performance of this geometry and compare its performance with cylindrical geometry using Monte Carlo simulation. Methods: We simulated a spheroid geometry with a radius of 199 mm...

Fourteen breast cancer lines (8 human, 5 rat, and 1 mouse) have been studied in terms of their ability to form multicellular tumor spheroids (MTS) with the agar-base method. Only 8 of the lines formed MTS in contrast to a 100% efficiency in a series of 11 varied tumors reported in the initial studies with this method. We have compared the lines that do and do not form MTS in terms of a variety ...

Chinese hamster cells (V79 379A) cells from a human small cell carcinoma of the lung (ME/MAR) and two xenografted human melanomas (HX117 and HX118) have been grown as multicellular spheroids in vitro. The radiation response of these four cell types has been compared when grown as spheroids (200 or 400 pm in diameter) and as single cells from disaggregated spheroids. The radiation sensitivity of...

The intricate microenvironment in which malignant cells reside is essential for the progression of tumor growth. Both physical and biochemical features (TME) play a critical role promoting differentiation, proliferation, invasion, metastasis cancer cells. It therefore to understand how interact communicate with an assortment supportive tumor-associated including macrophages, fibroblasts, endoth...

In its many applications, the Atomic Force Microscope (AFM) is a promising tool in cardiac mechanobiology because it can unravel viscoelastic and mechano-dynamic properties of individual cardiomyocytes. However, biophysical investigation more accurate 3D models hampered by commercial probes, which typically operate at cell sub-compartmental resolution. We have previously shown how flat macro-pr...

We describe a viscocapillary instability that can perturb the spherical symmetry of cellular aggregates in culture, also called multicellular spheroids. In condition where cells constituting spheroid get their necessary metabolites from immediate, outer microenvironment, permanent cell flow exists within its rim divide toward core they die. A perturbation induces viscous shear stresses tissue d...