Abstract:
:The effects of kinin B1 receptor (B1 R) deletion were examined on femur bone regeneration in streptozotocin (STZ)-type 1 diabetes. Diabetes induction in wild-type C57/BL6 (WTC57BL6) mice led to decrease in body weight and hyperglycemia, compared to the non-diabetic group of the same strain. The lack of B1 R did not affect STZ-elicited body weight loss, but partially prevented hyperglycemia. Diabetic mice had a clear delay in bone regeneration, and displayed large areas of loose connective tissue within the defects, with a reduced expression of the mineralization-related protein osteonectin, when compared to the non-diabetic WTC57/BL6. The non-diabetic and diabetic B1 R knockout (B1 RKO) mice had bone regeneration levels and osteonectin expression comparable to that seen in control WTC57/BL6 mice. WTC57/BL6 STZ-diabetic mice also showed a marked reduction of collagen contents, with increased immunolabeling for the apoptosis marker caspase-3, whereas diabetic B1 RKO had collagen levels and caspase-3 activity comparable to those observed in non-diabetic WTC57/BL6 or B1 RKO mice. No significant difference was detected in the number of tartrate-resistant acid phosphatase (TRAP)-stained cells, or in RANK/RANKL/OPG system immunolabeling throughout the experimental groups. Data bring novel evidence on the relevance of kinin B1 R under type 1 diabetes with regards to its role in bone regeneration.
journal_name
J Cell Physioljournal_title
Journal of cellular physiologyauthors
Cignachi NP,Pesquero JB,Oliveira RB,Etges A,Campos MMdoi
10.1002/jcp.25034subject
Has Abstractpub_date
2015-12-01 00:00:00pages
3019-28issue
12eissn
0021-9541issn
1097-4652journal_volume
230pub_type
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