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Regulation of age-related structural integrity in neurons by protein with tau-like repeats (PTL-1) is cell autonomous

Journal Article


Abstract


  • PTL-1 is the sole homolog of the MAP2/MAP4/tau family in Caenorhabditis elegans. Accumulation of tau is a pathological hallmark of neurodegenerative diseases such as Alzheimer's disease. Therefore, reducing tau levels has been suggested as a therapeutic strategy. We previously showed that PTL-1 maintains age-related structural integrity in neurons, implying that excessive reduction in the levels of a tau-like protein is detrimental. Here, we demonstrate that the regulation of neuronal ageing by PTL-1 occurs via a cell-autonomous mechanism. We re-expressed PTL-1 in a null mutant background using a pan-neuronal promoter to show that PTL-1 functions in neurons to maintain structural integrity. We next expressed PTL-1 only in touch neurons and showed rescue of the neuronal ageing phenotype of ptl-1 mutant animals in these neurons but not in another neuronal subset, the ventral nerve cord GABAergic neurons. Knockdown of PTL-1 in touch neurons also resulted in premature neuronal ageing in these neurons but not in GABAergic neurons. Additionally, expression of PTL-1 in touch neurons alone was unable to rescue the shortened lifespan observed in ptl-1 mutants, but pan-neuronal re-expression restored wild-type longevity, indicating that, at least for a specific group of mechanosensory neurons, premature neuronal ageing and organismal ageing can be decoupled.

Authors


  •   Chew, Yee Lian
  •   Fan, Xiaochen (external author)
  •   Göt, Jürgen (external author)
  •   Nicholas, Hannah (external author)

Publication Date


  • 2014

Citation


  • Chew, Y. Lian., Fan, X., Gotz, J. & Nicholas, H. R. (2014). Regulation of age-related structural integrity in neurons by protein with tau-like repeats (PTL-1) is cell autonomous. Scientific Reports, 4 5185-1-5185-9.

Scopus Eid


  • 2-s2.0-84902096328

Start Page


  • 5185-1

End Page


  • 5185-9

Volume


  • 4

Place Of Publication


  • United Kingdom

Abstract


  • PTL-1 is the sole homolog of the MAP2/MAP4/tau family in Caenorhabditis elegans. Accumulation of tau is a pathological hallmark of neurodegenerative diseases such as Alzheimer's disease. Therefore, reducing tau levels has been suggested as a therapeutic strategy. We previously showed that PTL-1 maintains age-related structural integrity in neurons, implying that excessive reduction in the levels of a tau-like protein is detrimental. Here, we demonstrate that the regulation of neuronal ageing by PTL-1 occurs via a cell-autonomous mechanism. We re-expressed PTL-1 in a null mutant background using a pan-neuronal promoter to show that PTL-1 functions in neurons to maintain structural integrity. We next expressed PTL-1 only in touch neurons and showed rescue of the neuronal ageing phenotype of ptl-1 mutant animals in these neurons but not in another neuronal subset, the ventral nerve cord GABAergic neurons. Knockdown of PTL-1 in touch neurons also resulted in premature neuronal ageing in these neurons but not in GABAergic neurons. Additionally, expression of PTL-1 in touch neurons alone was unable to rescue the shortened lifespan observed in ptl-1 mutants, but pan-neuronal re-expression restored wild-type longevity, indicating that, at least for a specific group of mechanosensory neurons, premature neuronal ageing and organismal ageing can be decoupled.

Authors


  •   Chew, Yee Lian
  •   Fan, Xiaochen (external author)
  •   Göt, Jürgen (external author)
  •   Nicholas, Hannah (external author)

Publication Date


  • 2014

Citation


  • Chew, Y. Lian., Fan, X., Gotz, J. & Nicholas, H. R. (2014). Regulation of age-related structural integrity in neurons by protein with tau-like repeats (PTL-1) is cell autonomous. Scientific Reports, 4 5185-1-5185-9.

Scopus Eid


  • 2-s2.0-84902096328

Start Page


  • 5185-1

End Page


  • 5185-9

Volume


  • 4

Place Of Publication


  • United Kingdom