TH and neuroblastoma: qPCR showed that CAMK2G knockdown by RNA interference and 6‐OHDA–induced injury inhibited TH transcription in PMA‐differentiated human neuroblastoma (SH‐SY5Y) cells, which constitutively express TH and are morphologically, physiologically and biochemically similar to adrenergic neuron[35] (Figure 4g).