1
|
Saneyasu T, Ogasawara K, Fujiwara Y, Honda K, Kamisoyama H. Atrogin-1 knockdown inhibits the autophagy-lysosome system in mammalian and avian myotubes. Comp Biochem Physiol A Mol Integr Physiol 2022; 271:111262. [PMID: 35750158 DOI: 10.1016/j.cbpa.2022.111262] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2022] [Revised: 06/07/2022] [Accepted: 06/17/2022] [Indexed: 10/17/2022]
Abstract
Atrogin-1 plays an important role in ubiquitin-proteasome proteolysis in vertebrate skeletal muscles. Recently, atrogin-1 has been shown to be involved in the autophagy-lysosome system, another proteolytic system, in the murine and fish hearts and skeletal muscles. With the aim to elucidate the effect of atrogin-1 on the autophagy-lysosome system in mammalian and avian skeletal muscles, this study has examined the effects of atrogin-1 knockdown on autophagy-lysosome-related proteins in C2C12 and chicken embryonic myotubes. Using the levels of microtubule-associated protein light chain 3 (LC3)-II protein, it was confirmed that atrogin-1 knockdown blocked the autophagic flux in both the myotubes. In addition, atrogin-1 knockdown in C2C12 myotubes significantly decreased the level of autophagy-related gene (ATG)12-ATG5 conjugate, which is supposedly necessary for the fusion of autophagosomes and lysosomes. Atrogin-1 knockdown also resulted in downregulation of forkhead box O3, a transcription factor for ATG12. These data suggest that atrogin-1 is essential for the normal autophagy-lysosome system in the striated muscles of vertebrates.
Collapse
Affiliation(s)
- Takaoki Saneyasu
- Graduate School of Agricultural Science, Kobe University, Kobe 657-8501, Japan.
| | - Kazuki Ogasawara
- Graduate School of Agricultural Science, Kobe University, Kobe 657-8501, Japan
| | - Yuki Fujiwara
- Graduate School of Agricultural Science, Kobe University, Kobe 657-8501, Japan
| | - Kazuhisa Honda
- Graduate School of Agricultural Science, Kobe University, Kobe 657-8501, Japan
| | - Hiroshi Kamisoyama
- Graduate School of Agricultural Science, Kobe University, Kobe 657-8501, Japan
| |
Collapse
|
2
|
Núñez-León D, Cordero GA, Schlindwein X, Jensen P, Stoeckli E, Sánchez-Villagra MR, Werneburg I. Shifts in growth, but not differentiation, foreshadow the formation of exaggerated forms under chicken domestication. Proc Biol Sci 2021; 288:20210392. [PMID: 34130497 DOI: 10.1098/rspb.2021.0392] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022] Open
Abstract
Domestication provides an outstanding opportunity for biologists to explore the underpinnings of organismal diversification. In domesticated animals, selective breeding for exaggerated traits is expected to override genetic correlations that normally modulate phenotypic variation in nature. Whether this strong directional selection affects the sequence of tightly synchronized events by which organisms arise (ontogeny) is often overlooked. To address this concern, we compared the ontogeny of the red junglefowl (RJF) (Gallus gallus) to four conspecific lineages that underwent selection for traits of economic or ornamental value to humans. Trait differentiation sequences in embryos of these chicken breeds generally resembled the representative ancestral condition in the RJF, thus revealing that early ontogeny remains highly canalized even during evolution under domestication. This key finding substantiates that the genetic cost of domestication does not necessarily compromise early ontogenetic steps that ensure the production of viable offspring. Instead, disproportionate beak and limb growth (allometry) towards the end of ontogeny better explained phenotypes linked to intense selection for industrial-scale production over the last 100 years. Illuminating the spatial and temporal specificity of development is foundational to the enhancement of chicken breeds, as well as to ongoing research on the origins of phenotypic variation in wild avian species.
Collapse
Affiliation(s)
- Daniel Núñez-León
- Paläontologisches Institut und Museum, Universität Zürich, Karl Schmid-Strasse 4, 8006, Zürich, Switzerland
| | - Gerardo A Cordero
- Senckenberg Centre for Human Evolution and Palaeoenvironment (HEP) an der Eberhard Karls, Universität Tübingen, Tübingen, Germany.,Fachbereich Geowissenschaften, Eberhard Karls Universität Tübingen, Tübingen, Germany
| | - Xenia Schlindwein
- Senckenberg Centre for Human Evolution and Palaeoenvironment (HEP) an der Eberhard Karls, Universität Tübingen, Tübingen, Germany.,Fachbereich Geowissenschaften, Eberhard Karls Universität Tübingen, Tübingen, Germany
| | - Per Jensen
- IFM Biologi, AVIAN Behavioural Genomics and Physiology group, Linköping University, SE-58183 Linköping, Sweden
| | - Esther Stoeckli
- Department of Molecular Life Sciences, Universität Zürich, Winterthurerstrasse 190, 8057, Zürich, Switzerland
| | - Marcelo R Sánchez-Villagra
- Paläontologisches Institut und Museum, Universität Zürich, Karl Schmid-Strasse 4, 8006, Zürich, Switzerland
| | - Ingmar Werneburg
- Senckenberg Centre for Human Evolution and Palaeoenvironment (HEP) an der Eberhard Karls, Universität Tübingen, Tübingen, Germany.,Fachbereich Geowissenschaften, Eberhard Karls Universität Tübingen, Tübingen, Germany
| |
Collapse
|