AKT	v-akt murine thymoma viral oncogene homolog 1
ALP/Alp	alkaline phosphatase
ARS	Alizarin red staining
BMSCs	bone marrow stromal cells
BMD	bone mineral density
BMP	bone morphogenetic protein
BV/TV	bone volume to tissue volume (bone volume fraction)
CCK-8	Cell Counting Kit-8
CDK2	cyclin-dependent kinase 2
CDK12	cyclin-dependent kinase 12
Ctr	control
ColIα1	collagen type 1 alpha-1
EDTA	ethylene diamine tetraacetic acid
Erk	extracellular signal-regulated kinase
FAK	focal adhesion kinase
FBS	fetal bovine serum
FNDC5/Fndc5	fibronectin type III domain-containing 5
Gapdh/GAPDH	glyceraldehyde 3-phosphate dehydrogenase
MAP	mitogen-activated protein
MAR	mineral apposition rate
microCT	micro-computed tomography
NC	negative control
OD	optical density
pAb	Polyclonal antibody
PBS	phosphate buffer saline
PFA	paraformaldehyde
PI3K	phosphatidylinositol-3 kinase
r-irisin	recombinant irisin
ROS	reactive oxygen species
RPM	random position machine
SM	simulated microgravity
Si-β-cat	β-catenin siRNA
Si-NC	siRNA NC
Vec	pcDNA3.1 blank vector
Wnt	wingless-type MMTV integration site family
α-MEM	alpha Modified Eagle’s Medium
β-cat	pcDNA3.1-β-catenin plasmid