Effect of glucose and mannitol on LDH release. Quiescent HPMCs were incubated with escalating doses of glucose or mannitol in M199 media for 24 h (⋄), 48 h (○), or 72 h (•), after which culture supernatants were harvested for assay of LDH release. Results were obtained from triplicate experiments. *P = 0·01, #P = 0·000, †P = 0·026, ‡P = 0·001, §P = 0·002 compared to medium control.