This assumption allows many growth theorists to conclude that capital investment is relatively unimportant as a growth factor.
"I think there's enough biologic plausibility to the argument that they can serve as a growth factor for the cancer cell," said Dr. Jennifer R. Grandis, a professor at the University of Pittsburgh who has done studies of the matter.
However, insulin also acts as a growth factor, inducing cell proliferation [18, 19].
It participates in bone remodeling and acts as a growth factor stimulating proliferation.
Originally, PGRN was regarded as a growth factor that physiologically promotes cell proliferation and wound healing (He et al., 2003).
In this study insulin as a growth factor for cartilage tissue engineering and a biodegradable PLGA delivery device were used.
First we loaded heparin into a dopamine-conjugated hyaluronic acid (HA) coating to serve as a growth factor reservoir.
Indeed, we have demonstrated that leptin acts as a growth factor for prostate cancer cells in vitro.
In this study, chondromimetic hyaluronan microspheres were used as a growth factor delivery source for hMSC chondrogenesis.
Besides its function as a growth factor and neurotropic factor, PGRN was reported to have anti-inflammatory activities in multiple inflammatory conditions (Jian et al., 2013a).
Pyrroloquinoline quinone (PQQ), a tricarboxylic acid, has attracted attention as a growth factor, and its application to supplements and cosmetics is underway.
