Glymphatic clearance controls state-dependent changes in brain lactate concentration
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Glymphatic clearance controls state-dependent changes in brain lactate concentration. / Lundgaard, Iben; Lu, Minh Lon; Yang, Ezra; Peng, Weiguo; Mestre, Humberto; Hitomi, Emi; Deane, Rashid; Nedergaard, Maiken.
In: Journal of Cerebral Blood Flow and Metabolism, Vol. 37, No. 6, 06.2017, p. 2112-2124.Research output: Contribution to journal › Journal article › Research › peer-review
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TY - JOUR
T1 - Glymphatic clearance controls state-dependent changes in brain lactate concentration
AU - Lundgaard, Iben
AU - Lu, Minh Lon
AU - Yang, Ezra
AU - Peng, Weiguo
AU - Mestre, Humberto
AU - Hitomi, Emi
AU - Deane, Rashid
AU - Nedergaard, Maiken
N1 - © The Author(s) 2016.
PY - 2017/6
Y1 - 2017/6
N2 - Brain lactate concentration is higher during wakefulness than in sleep. However, it is unknown why arousal is linked to an increase in brain lactate and why lactate declines within minutes of sleep. Here, we show that the glymphatic system is responsible for state-dependent changes in brain lactate concentration. Suppression of glymphatic function via acetazolamide treatment, cisterna magna puncture, aquaporin 4 deletion, or changes in body position reduced the decline in brain lactate normally observed when awake mice transition into sleep or anesthesia. Concurrently, the same manipulations diminished accumulation of lactate in cervical, but not in inguinal lymph nodes when mice were anesthetized. Thus, our study suggests that brain lactate is an excellent biomarker of the sleep-wake cycle and increases further during sleep deprivation, because brain lactate is inversely correlated with glymphatic-lymphatic clearance. This analysis provides fundamental new insight into brain energy metabolism by demonstrating that glucose that is not fully oxidized can be exported as lactate via glymphatic-lymphatic fluid transport.
AB - Brain lactate concentration is higher during wakefulness than in sleep. However, it is unknown why arousal is linked to an increase in brain lactate and why lactate declines within minutes of sleep. Here, we show that the glymphatic system is responsible for state-dependent changes in brain lactate concentration. Suppression of glymphatic function via acetazolamide treatment, cisterna magna puncture, aquaporin 4 deletion, or changes in body position reduced the decline in brain lactate normally observed when awake mice transition into sleep or anesthesia. Concurrently, the same manipulations diminished accumulation of lactate in cervical, but not in inguinal lymph nodes when mice were anesthetized. Thus, our study suggests that brain lactate is an excellent biomarker of the sleep-wake cycle and increases further during sleep deprivation, because brain lactate is inversely correlated with glymphatic-lymphatic clearance. This analysis provides fundamental new insight into brain energy metabolism by demonstrating that glucose that is not fully oxidized can be exported as lactate via glymphatic-lymphatic fluid transport.
U2 - 10.1177/0271678X16661202
DO - 10.1177/0271678X16661202
M3 - Journal article
C2 - 27481936
VL - 37
SP - 2112
EP - 2124
JO - Journal of Cerebral Blood Flow and Metabolism
JF - Journal of Cerebral Blood Flow and Metabolism
SN - 0271-678X
IS - 6
ER -
ID: 164971692