Prediction and control of cancer invasion is a vital problem in medical science. This paper proposes a modern geometric Ricci–flow model for control of avascular multicellular tumor spheroid decay.

Evidence for the functional superiority of cells cultured as 3D aggregates or on 3D scaffolds over conventional 2D monolayer cultures has created interest in material and cell based methods that influence the formation and structure of multicellular aggregates in vitro. We have created a co-culture of primary rat hepatocytes and hepatic stellate cells on a poly(DL-lactic acid) surface, a poor s...

Background: Several cell lines when cultured under proper condition can form three dimensional structures called multicellular tumor spheroids. Tumor spheroids are valuable in vitro models for studying physical and biological behavior of real tumors. A number of previous studies using a variety of techniques have shown no relationship between radiosensitivity and DNA strand breaks in monolayer ...

Monitoring the DNA-Damage Response (DDR) activated pathway in multicellular tumor spheroid models is an important challenge as these 3D models have demonstrated their major relevance in pharmacological evaluation. Herein we present DDR-Act-FP, a fluorescent biosensor that allows detection of DDR activation through monitoring of the p21 promoter p53-dependent activation. We show that cells expre...

Tumor cells grown as multicellular spheroids are known to be intrinsically more resistant to a large and diverse array of anticancer chemotherapeutic drugs compared to the same cells grown as dispersed monolayer cell cultures. Some drugs, however, seem relatively insensitive to this multicellular drug resistance, e.g., cisplatinum. Whether the cytotoxic effects of Taxol, an anticancer drug of g...

@ 0///)// ! 115 $8$68 8 145 "!36"$6768""6! ######63$"8 (BLOCKIN#AA+9+++AAAABC######63$"8* When you leave your homeland, you leave a part of your heart there. It needs many big hearts to repair it. I have been blessed to have so many warm hearted people around me to complete my lost piece of heart. To my beloved husband Pasha and my precious son Attila List of enclosed papers This thesis is base...

This paper presents a multicellular spheroid chip capable of forming and extracting three-dimensional (3D) spheroids using removable cell trapping barriers. Compared to the conventional macro-scale spheroid formation methods, including spinning, hanging-drop, and liquid-overlay methods, the recent micro-scale spheroid chips have the advantage of forming smaller spheroids with better uniformity....

Multicellular tumor spheroids (MTS) are an in vitro model system of avascular tumors. They are used to study how local microenvironments affect cellular growth, viability, and therapeutic response. We are developing in silico, agent-based analogues to provide new options for gaining exploitable insight into both the in vitro and in vivo systems. MTS exhibit characteristic phenotypic attributes:...