Hunger and lack of sleep

Due to some recent changes in my life, I am working more than usual, which isn't that much! I notice that in sleeping less, I've been eating more. Sometimes I wonder if what I read / learn also affect how I am.

There's a growing corpus of literature that shows that appetite inducing hormone, ghrelin, is not only fluctuating throughout a 24h period, but it also increased due to lack of sleep. This was reported awhile back and my recent lack of sleep has also increased my appetite. Is this real or am I buying into the hype?

Another line of evidence that shows the importance of ghrelin is in patients who have undergone Roux-en-Y gastric bypass surgery. Not only do these patients have decrease ghrelin, but they also have increased release of GLP-1. Although not a direct antagonist to ghrelin, GLP-1 increases insulin secretion and thus, lowering blood sugar while suppressing appetite. Intriguing eh?!