Ultrasound Hyperthermia Technology for Radiosensitization

Inhibition of telomerase activity enhances hyperthermia-mediated radiosensitization.

Hyperthermia is a potent sensitizer of cell killing by ionizing radiation (IR); however, hyperthermia also induces heat shock protein 70 (HSP70) synthesis and HSP70 expression is associated with radioresistance. Because HSP70 interacts with the telomerase complex and expression of the telomerase catalytic unit (hTERT) extends the life span of the human cells, we determined if heat shock influen...

Hyperthermia in Extracorporeal Technology

A review of the application of hyperthermia in the treatment of cancer is presented. The definition, historical background, biological rationale, indications and contraindications are discussed. The five basic methods of inducing hyperthermia as well as the five objective therapeutic modalities are reviewed. Hyperthermia for the treatment of cancer applied by extracorporeal circulation either a...

Theoretical study of convergent ultrasound hyperthermia for treating bone tumors.

This study investigates the optimal external parameters for using an ultrasound applicator for treating bone tumors. This system utilized spherically arranged applicators such as scanned focused ultrasound, and spherically focused multielement applicators. The power deposition pattern is modeled as geometric gain with exponential attenuation. The specific absorption rate ratio (SARR) criteria h...

Cytotoxicity, Radiosensitization, Antitumor Activity, and Interaction with Hyperthermia of a Co(III) Mustard Complex1

A complex of Co(III) with a nitro group and a bis(2-chloroethyl)amine moiety was prepared in an effort to develop a new anticancer agent with radiosensitizing capabilities, direct antitumor activity, and the ability to interact positively with clinically relevant hyperthermia temperatures. The activity of this drug was compared to a similar Co(III) complex, nitro-bis(2,4-pentanedionato)(pyridin...

Radiosensitization with Hyperthermia and Chemotherapeutic Agents: Effects on Linear-Quadratic Parameters of Radiation Cell Survival Curves