SLC12A5 and Tinnitus: The tinnitus group had higher of borderline significance mRNA expression of KCC2 gene than the control group in the cochlea (1.96 ± 0.22 versus 1.72 ± 0.13, p = 0.066); whereas the spirulina group had significantly lower mRNA expression of KCC2 gene than the tinnitus group in the cochlea (1.58 ± 0.12 versus 1.96 ± 0.22, p = 0.003).