Abstract:
:To demonstrate the preference of lactate over glucose as an energy substrate in normal brain tissue under normoxic condition, the dynamic changes in glucose uptake by lactate loading were investigated in living rat brain slices using a positron autoradiography technique. Fresh rat brain slices were incubated with [18F]2-fluoro-2-deoxy-D-glucose ([18F]FDG) in oxygenated Krebs-Ringer solution containing 10 mM glucose at 36 degrees C. During incubation, serial two-dimensional imaging of [18F]FDG uptake in the slices was constructed on the imaging plates. Lactate loading (20 mM) reversibly suppressed the [18F]FDG accumulation up to 80 min. Compared with the pre-loading and the unloaded control values, [18F]FDG uptake was suppressed to 25-45% in cerebral regions and 6-7% in cerebellum. The lactate concentration in the surrounding medium decreased after lactate loading. Hence brain tissue preferentially uses lactate over glucose under normoxic and euglycemic condition.
journal_name
Neurosci Lettjournal_title
Neuroscience lettersauthors
Murata T,Waki A,Omata N,Fujibayashi Y,Sadato N,Yano R,Yoshimoto M,Isaki K,Yonekura Ydoi
10.1016/s0304-3940(98)00413-3subject
Has Abstractpub_date
1998-06-19 00:00:00pages
155-8issue
2-3eissn
0304-3940issn
1872-7972pii
S0304-3940(98)00413-3journal_volume
249pub_type
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