19 February 2020 : Animal Research
Role of Ca²⁺ in Inhibiting Ischemia-Induced Apoptosis of Parathyroid Gland Cells in New Zealand White Rabbits
Wei-han Cao1ABCDEF, Yan-jun Su2AG, Nian-qiu Liu3BCDF, Ying Peng4BD, Chang Diao4F, Ruo-chuan Cheng2A*DOI: 10.12659/MSM.920546
Med Sci Monit 2020; 26:e920546
Abstract
BACKGROUND: Hypoparathyroidism is a common complication after thyroidectomy. Calcium supplementation can relieve these symptoms, but it is not clear whether it can protect the parathyroid glands. This study aimed to verify whether Ca²⁺ inhibits the apoptosis of parathyroid cells following ischemic injury.
MATERIAL AND METHODS: A rabbit model of parathyroid gland ischemic injury was established. The blood calcium concentrations were measured by colorimetry. The parathyroid hormone (PTH) levels were measured by enzyme-linked immunosorbent assay (ELISA). The parathyroid tissues were observed by hematoxylin and eosin (H&E) staining and the TdT-mediated dUTP nick-end labeling (TUNEL) assay. Western blotting was used to quantify the levels of the following proteins: caspase-3 and p38 MAP Kinase (p38 MAPK).
RESULTS: This study demonstrates that apoptosis can be a part of the pathological changes associated with parathyroid ischemic injury. Calcium supplementation inhibited the apoptosis of parathyroid cells following ischemic injury. There were no significant differences among the serum calcium levels from the Sham operation (Sham), the Control group (CG), or the Calcium supplementation group (CSG) after 24 h, 72 h, and 168 h of treatment. PTH levels in the CG were significantly higher than in the CSG at 24 h and 72 h after treatments. The apoptosis rate of parathyroid cells from rabbits in the CSG was significantly lower than that of those from rabbits in the CG at 24 h and 72 h after the treatment. Calcium supplementation inhibited p38 MAPK and caspase-3 expression.
CONCLUSIONS: This study demonstrates that calcium supplementation inhibited the apoptosis of parathyroid cells following ischemic injury.
Keywords: Ischemia, Parathyroid Glands, Parathyroid Hormone
Errate
In Figure 1A, the images of CG 24h group and Sham 72h group are duplicated, where the picture of Sham 72h group is correct, now the authors have corrected the picture of CG 24h group.
In Figure 2A, the images of CG 72h and CSG 72h groups are duplicated, the images of CG 168h and CSG 168h groups are duplicated,where the pictures of CG 168h and CSG 72h groups are correct, now the authors have corrected the pictures of CG 72h and CSG 168h groups.
In Figure 3B, the images of CG 24h group and CSG 72h group are duplicated, where the picture of CSG 72h group is correct, now the authors have corrected the picture of CG 24h group.
Reference:
Wei-han Cao, Yan-jun Su, Nian-qiu Liu, Ying Peng, Chang Diao, Ruo-chuan Cheng: Role of Ca²⁺ in Inhibiting Ischemia-Induced Apoptosis of Parathyroid Gland Cells in New Zealand White Rabbits. Med Sci Monit, 2020; 26: e920546. DOI: 10.12659/MSM.920546
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