Abstract

The objective of this study was to determine the impact of calcium sensing receptor (CASR) A990G genetic polymorphism on parathyroid hormone (PTH) lowering response to cinacalcet treatment when controlling for significant influencing clinical factors. This retrospective study was conducted on 135 Thai hemodialysis (HD) patients with secondary hyperparathyroidism (SHPT). CASR A990G genotypes were determined. The patients were identified as either G carriers (heterozygous or homozygous CASR 990G allele carriers) or noncarriers (homozygous CASR 990A carriers). Tested covariates were baseline PTH level (bPTH), baseline serum phosphate (bPhos), baseline serum calcium (bCa), baseline calcitriol equivalent dose (bCtriol), baseline ergocalciferol dose (bErgo), and age. The ANCOVA showed that intact PTH levels after 12 weeks of cinacalcet treatment (PTHw12) was significantly lower among G carriers compared with noncarriers after controlling for bPTH, bPhos, bCtriol, and bErgo (F(1, 127) = 15.472, p < 0.001), with the adjusted mean difference of 253.7 pg/mL. The logistic regression analysis revealed that the odds of a G carrier achieving 30% PTH reduction after 12-week cinacalcet treatment were 3.968 times greater than the odds for a noncarrier after adjusting for bPhos, bCtriol, and age. In conclusion, the CASR A990G polymorphism significantly influences cinacalcet response in HD patients with SHPT.

Details

Title
The impact of CASR A990G polymorphism in response to cinacalcet treatment in hemodialysis patients with secondary hyperparathyroidism
Author
Ngamkam Jaruwan 1 ; Somratai, Vadcharavivad 1 ; Nutthada, Areepium 1 ; Titinun, Auamnoy 2 ; Kullaya, Takkavatakarn 3 ; Pisut, Katavetin 3 ; Khajohn, Tiranathanagul 3 ; Praditpornsilpa Kearkiat 4 ; Eiam-Ong Somchai 3 ; Susantitaphong Paweena 3 

 Chulalongkorn University, Department of Pharmacy Practice, Faculty of Pharmaceutical Sciences, Bangkok, Thailand (GRID:grid.7922.e) (ISNI:0000 0001 0244 7875) 
 Burapha University, Faculty of Pharmaceutical Sciences, Chon Buri, Thailand (GRID:grid.411825.b) (ISNI:0000 0000 9482 780X) 
 Chulalongkorn University, Division of Nephrology, Department of Medicine, Faculty of Medicine, Bangkok, Thailand (GRID:grid.7922.e) (ISNI:0000 0001 0244 7875) 
 Chulalongkorn University, Division of Nephrology, Department of Medicine, Faculty of Medicine, Bangkok, Thailand (GRID:grid.7922.e) (ISNI:0000 0001 0244 7875); King Chulalongkorn Memorial Hospital, Excellent Center of Geriatrics, Bangkok, Thailand (GRID:grid.411628.8) (ISNI:0000 0000 9758 8584) 
Publication year
2021
Publication date
2021
Publisher
Nature Publishing Group
e-ISSN
20452322
Source type
Scholarly Journal
Language of publication
English
ProQuest document ID
2570664209
Copyright
© The Author(s) 2021. This work is published under http://creativecommons.org/licenses/by/4.0/ (the “License”). Notwithstanding the ProQuest Terms and Conditions, you may use this content in accordance with the terms of the License.