Abstract

RIERA-ESPINOZA, Gregorio et al. Supresión temprana a los 3 meses del propéptido amino terminal del procolágeno tipo 1 (P1NP) durante el tratamiento con risedronato 150 mg/mensuales en osteoporosis posmenopáusica. Rev Obstet Ginecol Venez [online]. 2014, vol.74, n.1, pp.40-46. ISSN 0048-7732.

Objective: Evaluate early response of risedronate 150 mg once-a-month on N-terminal propeptide of procollagen, a highly specific marker of bone formation and its correlation with another high specific marker of bone resorption, C telopeptide. This two measurements has been suggested by IOF and IFCC as a reliable, specific and reproductible bone markers. Methods: N-terminal propeptide of procollagen type I and serum Beta-CrossLaps (CTx) were evaluated in 80 postmenopausic Venezuelan women with low bone mass (T-score below -1.5) either at lumbar spine or femoral neck. N-terminal propeptide of procollagen and CTx were measured on fully automated cobas e411, Roche Diagnóstica (Electro-chemiluminescent immunoassay analyzer). Results: Mean age was 59.8 ± 8.3, age of menopause 46.8±6.3, 26 % had received HRT for a mean of 2.99 years. BMD at lumbar spine and femoral neck were T-scores -2.34 and -1.95. P1NP decreased 46.3.%, from 59.06 ± 22.3 to 31.01 ± 17.8 ng/mL, P< 0.000. CTx decreased 48 %, from 0.45 ± 0.18 to 0.21 ± 0.14 ng/mL, P< 0.000. Correlation between P1NP and CTx were highly significant before therapy r=638, P<0.000 and after 3 months r=0.538, P<0.000, Initial and 3 months P1NP were also highly correlated r=0.693, P<0.000. Suppression of bone remodeling (more than 10 % decrease in serum P1NP) was achieved in 94.7 of the patients. Conclusion: Risedronate 150 mg once-a-month suppressed bone remodeling into normal premenopausal reference range at 3 months, measured by 46.3 % reduction on P1NP and 48 % on serum CTx. P1NP decreased more than 10 % in 94.7 % of patients. Our data support the use of changes in P1NP as a good indicator of effectiveness during early (3 months) treatment of postmenopausal women with low bone mass with risedronate 150 mg once-a-month.

        · abstract in Spanish     · text in Spanish     · Spanish ( pdf )