6533b82dfe1ef96bd1290bc7
RESEARCH PRODUCT
A predominantly glial origin of axonal ribosomes after nerve injury
Christina F. VogelaarAri WaismanMiriam SchillnerChristina MüllerIlse Von GraevenitzSimone WoertgeJan Van MinnenKerstin MüllerAndrea Schnatzsubject
0301 basic medicineSchwann cellMice TransgenicBiologyRibosome03 medical and health sciencesCellular and Molecular Neuroscience0302 clinical medicinePeripheral Nerve InjuriesRibosomal proteinGanglia SpinalmedicineProtein biosynthesisAnimalsMRNA transportAxonNerve injurySciatic NerveAxonsNerve RegenerationCell biology030104 developmental biologymedicine.anatomical_structurenervous systemNeurologySchwann CellsSciatic nervemedicine.symptomNeuroglia030217 neurology & neurosurgerydescription
Axonal mRNA transport and local protein synthesis are crucial for peripheral axon regeneration. To date, it remains unclear how ribosomes localize to axons. They may be co-transported with mRNAs or, as suggested by recent studies, transferred from Schwann cells (SC). Here, we generated transgenic "RiboTracker" mice expressing tdTomato-tagged ribosomal protein L4 in specific cell types when crossed with Cre lines. Two neuronal RiboTracker-Cre lines displayed extremely low levels of axonal L4-tdTomato-positive ribosomes. In contrast, two glial RiboTracker-Cre lines revealed tagged ribosomes in sciatic nerve (SN) axons with increasing amounts after injury. Furthermore, non-RiboTracker dorsal root ganglia co-cultured with L4-tdTomato-expressing SCs displayed tagged ribosomes in axons. These data provide unequivocal evidence that SN axons receive ribosomes from SCs upon injury and indicate that glial cells are the main source of axonal ribosomes.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2017-08-11 | Glia |