Treadmill training increases the size of A cells from the L5 dorsal root ganglia in diabetic rats.
The aim of this study was to evaluate the effects of physical training on the L5 dorsal root ganglion (DRG) cells in streptozotocin diabetic rats. Male adult rats were divided into 3 groups: (control, diabetic and trained diabetic). Treadmill training was performed for 10 weeks (5 days/week, twice a day). Blood glucose concentrations and body weight were evaluated 48h after diabetes induction and every 30 days thereafter. Then, animals were killed and the right L5 DRG removed. Histological and morphometric analysis consisted of evaluating nuclear and cellular volumes and areas in A and B cells at light and ultrastructural levels. Blood glucose concentrations were higher in both diabetic groups vs controls at all periods. Body weights were lower in all diabetics vs controls at all periods after diabetes induction, with a significant time vs group interaction. In A cells, the cellular and nuclear volumes were lower than control animals only in the diabetic group; control and trained diabetic animals did not differ; in B cells the cellular and nuclear volumes were lower in diabetic and trained diabetic rats. The cellular areas of A cells were smaller in diabetic rats than in control and trained diabetic rats, while the cellular areas of B cells were smaller in the diabetic and trained groups. In conclusion, treadmill training was able to increase the size of A cells from the DRG in diabetic rats and improved the morphological features of these cells.
do Nascimento
Patrícia S
PS
Post Graduate Program in Neuroscience, Institute of Basic Health Sciences, Federal University of Rio Grande do Sul, Porto Alegre, Brazil.
Malysz
Tais
T
Ilha
Jocemar
J
Araujo
Rafaela T
RT
Hermel
Erica E S
EE
Kalil-Gaspar
Pedro I
PI
Faccioni-Heuser
Maria C
MC
Schaan
Beatriz D
BD
Achaval
Matilde
M
D000222:Adaptation, Physiological / Q000502:physiology; D000818:Animals; D001786:Blood Glucose / Q000032:analysis; D001835:Body Weight; D002467:Cell Nucleus / Q000473:pathology / Q000648:ultrastructure; D048429:Cell Size; D003921:Diabetes Mellitus, Experimental / Q000097:blood / Q000473:pathology*; D005080:Exercise Test; D005727:Ganglia, Spinal / Q000473:pathology* / Q000648:ultrastructure; D008159:Lumbar Vertebrae; D008297:Male; D046529:Microscopy, Electron, Transmission; D010805:Physical Conditioning, Animal; D051381:Rats; D017208:Rats, Wistar; D011984:Sensory Receptor Cells / Q000473:pathology* / Q000648:ultrastructure; D013311:Streptozocin
D001786:Blood Glucose; D013311:Streptozocin