Role of Ca²⁺ in Inhibiting Ischemia-Induced Apoptosis of Parathyroid Gland Cells in New Zealand White Rabbits

The predictive role of intraoperative parathyroid hormone measurement on postoperative parathyroid function in patients undergoing total thyroidectomy

Hypocalcemia is a common complication of thyroidectomy, particularly total thyroidectomy. The higher incidence of hypocalcemia following total thyroidectomy is primarily due to inadvertent damage to the parathyroid glands during surgery. This study aims to investigate the predictive value of intraoperative parathyroid hormone (IOPTH) in determining hypocalcemia during hospitalization and the recovery of parathyroid function after total thyroidectomy, as well as the factors that may influence IOPTH. In this retrospective study, we analyzed a cohort of 164 patients who underwent total thyroidectomy at our institution between 2018 and 2019. IOPTH was measured either 15 min after bilateral thyroidectomy combined with area VI lymph node dissection, or 15 min after bilateral thyroidectomy alone. We plotted ROC curves for IOPTH and ΔPTH% in relation to hypocalcemia during hospitalization and recovery of parathyroid function. Additionally, we explored risk factors for the development of hypocalcemia during hospitalization and factors that may influence IOPTH. IOPTH and ΔPTH% demonstrated good specificity and sensitivity for predicting hypocalcemia during hospitalization and for assessing recovery of parathyroid function. Lower preoperative PTH levels, chronic lymphocytic thyroiditis, and intraoperative parathyroid auto-transplantation were identified as risk factors for IOPTH < 15 pg/mL. IOPTH and ΔPTH% are predictive of hypocalcemia during the postoperative hospital stay and recovery of parathyroid function. Patients with chronic lymphocytic thyroiditis, intraoperative parathyroid auto-transplantation, and low preoperative PTH levels should be closely monitored for the recovery of parathyroid function after surgery.

Errate: Role of Ca²⁺ in Inhibiting Ischemia-Induced Apoptosis of Parathyroid Gland Cells in New Zealand White Rabbits

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.

Effects of Multi-stage Procurement on the Viability and Function of Human Donor Parathyroid Glands

INTRODUCTION

Parathyroid allotransplantation is an emerging treatment for severe hypoparathyroidism. Ensuring the viability and functional integrity of donor parathyroid glands following procurement is essential for optimal transplantation outcomes.

METHODS

Cellular viability, calcium-responsive hormone secretion, and gland xenograft survival were assessed in a series of deceased donor parathyroid glands following a two-stage procurement procedure recently developed by our group (en bloc cadaveric dissection with subsequent gland isolation after transport to the laboratory).

RESULTS

Parathyroid glands resected in this manner and stored up to 48 h in 4°C University of Wisconsin (UW) media retained in vitro viability with no induction of hypoxic stress (HIF-1α) or apoptotic (caspase-3) markers. Ex vivo storage did not significantly affect parathyroid gland calcium sensing capacity, with comparable calcium EC50 values and suppression of parathyroid hormone secretion at high ambient calcium concentrations. The isolated glands engrafted readily, vascularizing rapidly in vivo following transplantation into mice.

CONCLUSIONS

Parathyroid tissue retains viability, calcium-sensing capacity, and in vivo engraftment capability after en bloc cadaveric resection, ex vivo dissection, and extended cold storage.

25(OH)-Vitamin D alleviates neonatal infectious pneumonia via regulating TGFβ-mediated nuclear translocation mechanism of YAP/TAZ

Neonatal infectious pneumonia (NIP) is a common infectious disease that develops in the neonatal period. The purpose of our study was to explore the potential roles of 25(OH)-Vitamin D (25-OH-VD) and its anti-inflammatory mechanism in NIP. The results showed that serum 25-OH-VD level was negatively correlated with the severity of NIP, whereas Spearman’s correlation analysis showed a significant positive correlation between the severity of NIP and the levels of pneumonia markers procalcitonin (PCT) and interleukin-6 (IL-6). The expression of vitamin D receptor (VDR) was down-regulated, while the transforming growth factor β (TGFβ), nuclear YAP, and TAZ were up-regulated in the peripheral blood mononuclear cells (PBMCs) of neonates with severe pneumonia. Neonates with 25-OH-VD deficiency were associated with an increased risk of NIP. In BEAS-2B cells, down-regulation of nuclear YAP and TAZ was found in the lipopolysaccharide (LPS) + VD group relative to the LPS-induced group. Additionally, positive rate of nuclear YAP, as detected by immunocytochemistry (ICC), and the nuclear translocation of nuclear YAP/TAZ by IFA in the LPS+VD group showed an intermediate level between that of the control and LPS-induced groups. Furthermore, the expressions of VDR and CYP27B1 were significantly increased in the LPS+VD group as compared to those in the LPS-induced group. The anti-inflammatory mechanism in NIP was achieved due to the 25-OH-VD mediating TGFβ/YAP/TAZ pathway, which suggested that using 25-OH-VD might be a potential strategy for NIP treatment.