Which of the Following is NOT an Angiogenic Factor

Question

Which of the following is NOT an angiogenic factor?
A)TNF-α
B)Angiopoietin
C)Thrombospondin-1
D)PDGF
E)Leptin

Accepted Answer

Thrombospondin-1 is an anti-angiogenic factor, meaning it inhibits the formation of new blood vessels, whereas the other choices are all angiogenic factors that promote angiogenesis.