The candidate genes that play a key role in nicotine addiction include those associated with the dopaminergic neurotransmitter system (e.g., DRD2, DRD3, DRD4), cellular transport system (e.g., SLC1A2, SLC6A4), serotonergic neurotransmitter system (e.g., HTR2A), nicotinic neurotransmitter system (e.g., CHRNA4, CHRNA5, CHRNA3, CHRNA7, CHRNB4), opioidergic activity (e.g., OPRM1), and nicotine metabolism (e.g., CYP2A6) ( Figure 1 nAChRs are primary targets of nicotine, nicotine exerts direct and indirect effects on other receptor systems (e.g., opioid, serotonergic, glutamatergic) that also mediate nicotine-induced behavioral and neural changes in humans
Mid-season tobacco conjures vivid, if not fond, memories of long days of work in the heat of summer
For example, pregnant women in New Hampshire on the federal Special Supplemental Nutrition Program for Women, Infants, and Children (WIC) food assistance program who drink arsenic-tainted well water can now get a free pitcher and filters to remove the contaminant
Christopher Columbus, J ournals and Other Documents on the Life and Voyages of Christopher Columbus , translated by Samuel Eliot Morrison, 72-72, 84
Always keep them out of reach of children and pets, and only use them if youre already nicotine-dependent
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