TABLE 1.

Summary of adhesion molecules expressed on hematopoietic stem cells and their counter receptors on niche components.

Sr. no.	Adhesion molecules on HSCs	Receptor molecules in niche	Niche component expressing receptor molecules	References
1	Integrin β1αL (LFA-1)	ICAM-1	Endothelial cells	Shimizu et al., 1990
2	Integrin β1α4 (VLA-4)	VCAM-1/fibronectin	Endothelial cells	Peled et al., 2000
			ECM	Shimizu et al., 1990
3	Integrin β1α45 (VLA-5)	Fibronectin	ECM	Shimizu et al., 1990
4	Integrin β1α6 (VLA-6)	Laminin	ECM	Shimizu et al., 1990
5	Integrin β1α2	Fibronectin Fibrinogen Vitronectin von Willebrand factor	ECM	Gekas and Graf, 2013
6	Integrin β1α9	VCAM-1	Endothelial cells	Liu et al., 2018
7	Integrin β3α5	MAdCAM Periostin	ECM	Khurana et al., 2016
8	Integrin β7α4	VCAM-1	Endothelial cells	Katayama et al., 2004
9	ESL-1	E-selectin	Endothelial cells	Leiva et al., 2016
10	PSGL-1	E-selectin	Endothelial cells	Leiva et al., 2016
		P-selectin	Endothelial cells	Lévesque et al., 1999
11	CD162	P-selectin	Endothelial cells	Lévesque et al., 1999
12	CD34	L-selectin
13	CD44	Hyaluronic acid	MSC ECM	Avigdor et al., 2004; Wagner et al., 2008
14	Notch	Jagged	MSCs Endothelial cells Osteoblasts Osteoclasts	Azizidoost et al., 2015
15	N-cadherin	N-cadherin	MSCs	Zhao et al., 2019
16	Eph	Ephrin	MSCs	Foo et al., 2006