NGF and Allergy: Due to its anti-inflammatory effects, it can cure diseases such as allergies.85 Receptor tyrosine kinases (RTKs) are activated by various peptide growth factors such as IGF (insulin-like growth factor), EGF (epidermal growth factor) and NGF (nerve growth factor) etc. RTKs cause phosphorylation of downstream pathway proteins leading to complicated cytoplasmic and nuclear events, such as phosphorylation of other proteins and activation of enzymes involved in cell growth, survival and differentiation.86,87