Whereas in glioblastoma cells no effect on mTOR signalling was detected,14 Zhang et al reported an inhibitory effect on mTOR/p70S6K‐signalling in gastric carcinoma.12 As increased GA3P levels lead to activation of mTOR,35 a reduction of GA3P could be responsible for an inhibitory effect. The gene discussed is RPS6KB1; the disease is glioblastoma.