**7. Genes associated with hair loss**

Several studies including recent genome-wide association analyses concluded that a large number of single nucleotide polymorphisms (SNPs) are associated with AGA susceptibility. So far, only some of the genes involved in hair loss have been discovered: genes AR androgen receptor and EDA2R ectodysplasin A2 receptor from chromosome X, region located at 20p1 on chromosome 20, and additional loci associated with early onset baldness in Europeans, such as *HDAC9* in 7p21.1, *TARDBP* (chr1), *HDAC4* (chr2), *AUTS2* (chr7), *SETBP1* (chr18), q35 (*WNT10A*), chr3q25 (*SUCNR1*), chr5q33.3 (*EBF1*), and chr12p12.1 (*SSPN*) [36].
