Table 1. Key miRNA in tooth germ.

No	miRNA	probe_id	related signaling pathway in pig	miRNA function in tooth development
1	let-7f	PC-7f-3p-54949	TGF-beta	unknown but highly expressed in mouse incisor epithelium and mesenchyme [6]
2	miR-99b	ssc-miR-99b	others	unknown
3	miR-125b	ssc-miR-125b	TGF-beta	unknown but highly expressed in mouse incisor epithelium and mesenchyme [6]
4	miR-128	ssc-miR-128	Wnt	unknown
5	miR-133a	ssc-miR-133a	others	unknown but expressed in mouse tooth germ
6	miR-133b	ssc-miR-133b	others	unknown
7	miR-199a-3p	ssc-miR-199a-3p	Wnt	unknown but highly expressed in mouse incisor mesenchyme [6], [9]
8	miR-200b	PN-200b-3p-161	TGF-beta	unknown but expressed in mouse incisor labial cervical loop epithelium [8], [9]
9	miR-200c	PN-200c-3p-193	others	unknown but highly expressed in mouse incisor and labial cervical loop epithelium [8], [9]
10	miR-206	ssc-miR-206	TGF-beta	unknown
11	miR-214	ssc-miR-214	Wnt	indirect affects amelogenesis [26]
12	miR-379	PN-379-5p-1421	others	unknown
13	miR-380	PN-380-3p-267	others	unknown
14	miR-382	PN-382-5p-139	Wnt	unknown
15	miR-409	PN-409-3p-335	Wnt	unknown
16	miR-455	ssc-miR-455	others	unknown but prevalent at the mouse tooth germ cytodifferentiation stage [7], [8]
17	miR-487b	PN-487b-3p-443	others	unknown
18	miR-495	PN-495-3p-530	others	unknown