title: Cancer resistance, carcinogenesis and ground substance viscosity.
abstract: Tumor host resistance and promotion are multiple complex simultaneous phenomena. This paper relates only to the effect of ground substance viscosity on tumor host interaction. Tar, anthralin, ultraviolet light, x-ray and arsenic have been widely used to treat inflammatory skin disorders such as psoriasis. They are also well known carcinogens. It is proposed that both the anti-inflammatory effect and part of the carcinogenic effect could occur by decreasing ground substance viscosity and suppressing fibroblasts. Streptococcal infections, chloroquine and pyridoxine deficiency increase inflammatory skin disorders and are known to be beneficial to tumor resistance. It is proposed that both effects could occur because of their effect of increasing ground substance viscosity and, at least with streptococcal infections, by stimulating fibroblasts. Within certain limits, vitamin C has a stimulant effect on fibroblast and ground substance viscosity. Beta carotene is active in stimulating wound healing. Localized edema of the dermal papillae precedes granulocytic inflammation in disorders like psoriasis. Anything that decreases ground substance viscosity will prevent dilution of tissue fluids by decreasing localized edema and thus decrease formation of some mediators of inflammation. Anything that increases ground substance and its viscosity will promote local dilution of tissue fluid. Increasing dilution of tissue fluids promotes the formation of some mediators of inflammation. Tumors commonly secrete hyaluronidase. It is proposed that substances that decrease ground substance viscosity (hyaluronidase-like activity) encourage tumors and substances that increase ground substance viscosity (anti-hyaluronidase-like effect) increase resistance to tumors.
mesh_terms: D002273:Carcinogens; D004198:Disease Susceptibility; D006801:Humans; D007249:Inflammation; D009369:Neoplasms / Q000209:etiology*; D009381:Neoplasms, Radiation-Induced / Q000209:etiology; D012878:Skin Neoplasms / Q000139:chemically induced / Q000209:etiology; D014466:Ultraviolet Rays; D014783:Viscosity; D014965:X-Rays
chemical_list: D002273:Carcinogens