Tarek, there is a substantial body of work to indicate that ghrelin and stress marker levels change in metabolic syndrome and type 2 diabetes, there is a good reason why it is referred to as "metabolic syndrom" - causal effects of ghrelin on cytokines (your interest), however, is a different issue.
Perhaps you can search the published literature and find reports on effect of continuous ghrelin infusion (since its half-life is fairly short) on levels of cytokines.