All of the following play a significant role in bone resorption except:
Pro-resorptive factors are hormones and cytokines are:-

PTH (Parathyroid hormone)
1,25dihydroxyvitamin D3,
IL-1
IL-6
TNF (Tumour necrosis factor)
LIF (Leukaemia inhibitory factor)
Corticosteroids, which activate osteoblasts and stroma cells to produce RANKL and depress OPG.
Parathyroid hormone.
Interleukin1.
Interleukin6.
Interferon-gamma.