The phrase "activate a host of" is correct and usable in written English.
It can be used when referring to initiating or enabling a large number of things, such as features, options, or processes.
Example: "The new software update will activate a host of new features that enhance user experience."
Alternatives: "trigger a multitude of" or "initiate a range of".
In addition, the induction techniques tend to activate a host of melanocytes simultaneously rather than individual cells, which differs from the natural occurrence of human disease.
NPM-ALK is known to activate a host of cell signaling pathways, including those of Janus-family tyrosine kinase/signal transducer and activator of transcription 3 (STAT3), Ras/extracellular signal-regulated kinase (ERK) and phosphoinositide kinase-3/AKT, so as to deregulate various cellular functions such as cell cycle progression and cell survival.
The excessive formation of ROS activates a host of signaling pathways including endoplasmic reticulum (ER) stress and cell death [ 3].
The MAR system, present in many bacterial species, consists of an operon that confers efflux-mediated [ 18- 21] resistance to a broad range of antibiotics and can be activated by a host of chemical agents, including analgesics and food preservatives [ 2- 5, 7- 9, 22- 25].
Once activated, caspases cleave a host of cellular substrates, leading to morphological hallmarks of apoptosis, including DNA fragmentation.
It induces HIF1α, a transcription factor that regulates angiogenesis as well as cell survival, invasion and metastasis by activating transcription of a host of target genes.
Nevertheless, since both AICAR and activated AMPK determine a host of pleiotropic effects on different regulatory and homeostatic pathways (Cantó et al., 2010), prolonged observation on chronically treated animals is needed to establish treatment safety and eventual translatability to humans.
"Smokestacks" for coal plants have now become steam stacks, thanks to wet and dry ESPs, baghouses, low-NOx burners, SCRs, activated carbon injection and a host of other technologies.
When activated by one of a host of different stimuli, NF-κB translocates to the nucleus, where it regulates the expression of more than 200 genes that influence cell growth, survival, and inflammation (Aggarwal 2004).
These damaged neurons eventually die and lead to the production of neuritic plaques which are characterized by accumulation of Aβ fibrils, dystrophic neurites, reactive gliosis (astrocytes), extracellular filaments, and activated microglial, as well as a host of other proteins that have been found associated with these neuritic plaques.
