Ob- prefix means "to, to, on the contrary, against, up, completely, completely and on the contrary"

Protein, protein

Leptin Leptin

Taken together, this word means "anti-leptin". I'm not a medical major, so I can only understand this literally. If I am a medical major, I may have a professional expression, but even if there are different expressions, the meaning of this word is like this and will not change.