Cited by 671Neurogenesis and neuroplasticity mechanismsCancer, Hypoxia, and MetabolismMetabolism, Diabetes, and Cancer

The DOI matches its Crossref record; 77 of the 77 references it cites were found in a registry or an index; none of the 50 sources its claims cite is checked for support yet.

Metabolic reprogramming during neuronal differentiation from aerobic glycolysis to neuronal oxidative phosphorylation

Open access
Zheng, Xinde, Boyer, Leah, Jin, Mingji, Mertens, Jerome, Kim, Yongsung, Ma, Li, Ma, Li, Hamm, Michael, Gage, Fred H, Hunter, Tony·2016·eLife

Abstract

How metabolism is reprogrammed during neuronal differentiation is unknown. We found that the loss of hexokinase (HK2) and lactate dehydrogenase (LDHA) expression, together with a switch in pyruvate kinase gene splicing from PKM2 to PKM1, marks the transition from aerobic glycolysis in neural progenitor cells (NPC) to neuronal oxidative phosphorylation. The protein levels of c-MYC and N-MYC, transcriptional activators of the HK2 and LDHA genes, decrease dramatically. Constitutive expression of HK2 and LDHA during differentiation leads to neuronal cell death, indicating that the shut-off aerobic glycolysis is essential for neuronal survival. The metabolic regulators PGC-1α and ERRγ increase significantly upon neuronal differentiation to sustain the transcription of metabolic and mitochondrial genes, whose levels are unchanged compared to NPCs, revealing distinct transcriptional regulation of metabolic genes in the proliferation and post-mitotic differentiation states. Mitochondrial mass increases proportionally with neuronal mass growth, indicating an unknown mechanism linking mitochondrial biogenesis to cell size.

Overview

AI snapshot

Written from the paper’s full text.

TL;DR

Neuronal differentiation from human NPCs is marked by shutting off aerobic glycolysis and shifting to oxidative phosphorylation, with loss of HK2/LDHA, PKM2-to-PKM1 splicing, and decreased c-MYC/N-MYC. Constitutive HK2/LDHA expression kills differentiating neurons, while increased PGC-1α/ERRγ maintain rather than increase metabolic and mitochondrial gene expression.

Key findings

  • Differentiation from NPCs to neurons involves loss of HK2 and LDHA protein, a PKM splice switch from PKM2 to PKM1, and a neuron-specific OGDH splice form lacking a Ca²⁺-binding motif; c-MYC and N-MYC protein levels fall by ~70% and ~85%, respectively.
  • Neurons show lower glycolytic/TCA metabolite levels and higher oxidative capacity: basal and maximum OCR rise from ~82 and 130 pmoles/min/10 µg in NPCs to ~98 and 183 in 3-week neurons, while lactate/glucose ratio falls from ~1.61 to ~0.35.
  • Constitutive HK2 and LDHA expression during differentiation causes neuronal death: ~40% condensed nuclei versus ~6% in controls, with ~40% GFAP-positive glial cells versus ~4% in controls; extra pyruvate (5 mM) rescues neuronal death but not glial increase.
  • PGC-1α and ERRγ increase ~3–4 fold and ~2.8–3.4 fold, respectively, and are required to maintain expression of glycolysis, TCA, and mitochondrial respiratory complex genes, even though most mitochondrial gene expression is unchanged versus NPCs; mtDNA copy number and protein mass both increase ~4-fold by 3 weeks.

Methods

  • Human BJ iPSC-derived NPCs were differentiated for 1–3 weeks and validated by Sox2/Nestin and MAP2 staining; RNA-seq was performed on two NPC lines with duplicates, and data were mapped with STAR and quantified by FPKM.
  • Metabolic profiling used GC-MS for glycolytic/TCA metabolites, Seahorse for OCR, lactate assays, immunoblotting/immunostaining, RT-PCR, ChIP for c-MYC/N-MYC binding, and lenti-shRNA knockdowns of HK2, LDHA, PGC-1α, or ERRγ.
  • Direct neuronal conversion from fibroblasts was tested with PTB knockdown or Ngn2/Ascl1 overexpression; mouse neuroprogenitor differentiation and published mouse astrocyte/neuron RNA-seq were used for conservation checks.

Limitations

  • The paper states that expression levels of metabolic enzymes do not completely reflect biochemical/physiological activities, and post-translational modifications were not explored.
  • The paper notes that mitochondrial structure, dynamics, and matrix calcium were not investigated, and that protein degradation may also downregulate key metabolic enzymes.
  • Evident from the text: the main differentiation model relies on human BJ iPSC-derived NPCs, with some key findings validated in mouse cells; 3-week cultures were used as developing neurons, and rare glial cells emerge later, so longer-term neuronal populations were not the primary focus.

Model-written summary. Check it against the paper before relying on it.

Integrity signals

Registry

Crossref · 10.7554/elife.13374

Cites

77 of 77 references verified0 citation errors · 0 not checkable

Statistics

Nothing to recompute.

Verification

Claims the paper makes

0 of 50 cited sources checked · 0 supported · 0 flagged

Show all 99 claims

  • It may state two separate claims as one. 43
  • Probably not a substantial claim. 17
  • The quote only partly states this claim. 1
56 of 56
  • The paper relies on this without support.

    Little is known about the molecular basis of neurons' preference for oxidative phosphorylation or neuronal metabolic responses to energy crisis and their implications for disease progression.

    “Little is known about the molecular basis of neurons’ preference for oxidative phosphorylation, or neuronal metabolic responses to the energy crisis and their implications for disease progression.”
  • The paper relies on this without support.

    Neurons rely on oxidative phosphorylation to meet energy demands.

    “Neurons rely on oxidative phosphorylation to meet energy demands.”
  • The paper relies on this without support.

    Neurons rely on mitochondrial oxidative phosphorylation to meet energy demand.

    “Neurons rely on mitochondrial oxidative phosphorylation to meet energy demand.”
  • The paper relies on this without support.

    Aerobic glycolysis diverts pyruvate from mitochondrial oxidative phosphorylation for energy production by converting it into secreted lactate.

    “As aerobic glycolysis diverts pyruvate from mitochondrial oxidative phosphorylation for energy production by converting it into secreted lactate”
  • The paper relies on this without support.

    HK1 is still expressed in neurons.

    “HK1 is still expressed in neurons”
  • The paper relies on this without support.

    In proliferating NPCs, mitochondria are used for generation of biosynthetic precursors and mitochondria themselves have to be duplicated for daughter cells.

    “mitochondria are used for generation of biosynthetic precursors in these proliferating cells, and mitochondria themselves have to be duplicated for daughter cells.”
  • The paper relies on this without support.

    The expression levels of metabolic enzymes alone do not completely reflect their biochemical/physiological activities.

    “the expression levels of metabolic enzymes alone do not completely reflect their biochemical/physiological activities”
7 of 7

Claims other papers make about this one

Each is checked against this paper’s own text: does it say what the citing paper says it does?

Self-check

Percentages, sums and reported differences re-computed from the paper’s own numbers.

Each contradiction between two passages listed here was confirmed by an independent check.

  • NPC passage differs between the results and Figure 3 caption

    Minor

    The results say the HK2 and LDHA knockdown experiment used passage-3 NPCs, while the Figure 3C caption says passage 2.

  • Figure 1 caption reverses the TCA and PDH panel assignments

    Minor

    In the caption's ordered list, panel H corresponds to TCA and panel I to PDH. The results instead cite panel I for TCA genes and panel H for PDH-complex genes.

2 of 2

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Metadata

Authors
Zheng, X., Boyer, L., Jin, M., Mertens, J., Kim, Y., Ma, L., Ma, L., Hamm, M., Gage, F. H., & Hunter, T.
Affiliations
  • Salk Institute for Biological Studies (US)
  • Laboratory of Genetics, Salk Institute, La Jolla, United States
Corresponding author
  • Gage, Fred H
  • Hunter, Tony
Venue
eLife
Published
2016-06-10
Volume
5
ISSN
2050-084X (ISSN-L)
OpenAlex
W2416068580
Cited by
671
References
77
Citations by year
2026: 82 · 2025: 76 · 2024: 84 · 2023: 81 · 2022: 74 · 2021: 85 · 2020: 65 · 2019: 49 · 2018: 39 · 2017: 33 · 2016: 1
FWCI
20.80
Type
journal article
Language
en
Open access
Locations
  • eLife (publishedVersion, cc-by)
  • Europe PMC (PubMed Central) (publishedVersion, cc-by)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
  • DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion, cc-by-sa)
Funders
  • California Institute for Regenerative Medicine (TR2-01778)
  • Salk Pioneer postdoctoral fellowship
  • The G. Harold and Leila Y. Mathers Foundation
  • JPB Foundation
  • Leona M. and Harry B. Helmsley Charitable Trust (#2012-PG-MED002)
  • National Institutes of Health (CA14195, CA80100, CA82683)
Topics
  • Life Sciences › Neuroscience › Developmental Neuroscience › Neurogenesis and neuroplasticity mechanisms
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Cancer Research › Cancer, Hypoxia, and Metabolism
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Metabolism, Diabetes, and Cancer
Keywords
metabolic reprogramming, neuronal differentiation, aerobic glycolysis, oxidative phosphorylation, hexokinase 2, LDHA, c-Myc, MYCN, PGC-1α, estrogen-related receptor gamma, mitochondrial biogenesis, neural progenitor cells, neuronal cell death, mitochondrial mass
MeSH terms
Aerobiosis, Cell Differentiation, Cells, Cultured, Glycolysis, Humans, Metabolism, Oxidative Phosphorylation, Gene Expression Regulation, Developmental, Neural Stem Cells

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