The influence of hyperprolactinemia on coagulation parameters in females with prolactinomas.
2014
Introduction. Currently there is little information on the effects of
prolactin (PRL) on the coagulation and fibrinolytic systems. Objective. The
aim of this study was to evaluate the effects of hypeprolactinemia on the
parameters of the hemostatic system and activation of the coagulation system.
Methods. We studied PRL levels, body mass index (BMI), values of activated
partial thromboplastin time (aPTT), prothrombin time (PT), thrombin time
(TT), D-dimer level, von Willebrand factor antigen (vWFAg) and fibrinogen in
15 young female patients with microprolactinomas before and after therapy and
in 15 healthy female controls. Results. As expected, pretreatment PRL levels
were significantly higher in patients than in controls (140.90±42.87 vs.
12.53±4.05 ng/ml; p<0.001). PT, although still in the normal range, was
prolonged in patients with hyperprolactinemia as compared to the control
group (13.53±1.39 vs. 12.65±0.53 s; p=0.03) and normalized after therapy
(12.69±0.65 vs. 12.65±0.53 s; p=0.88). TT, although in normal range, was
significantly shorter in the hypeprolactinemic patients than in the controls
(14.34±4.52 vs. 17.21±1.35 s; p<0.025) and after treatment remained
significantly shorter than in the controls (15.17±1.55 vs. 17.21±1.35 s;
p<0.0001). D-dimer values before treatment in the patients with
hyperproplactinemia were above the normal range (239.47±107.93 vs.
131.27±50.64 ng/ml, p=0.002) and decreased to normal values after therapy
(239.47±107.93 vs. 146.60±39.15 ng/ml; p<0.001). D-dimer levels correlated
with PRL (r=0.30) and the change in serum D-dimer values significantly
correlated with the change in PRL levels during therapy (r=0.62). aPTT, vWFAg
and fibrinogen were similar in patients and controls. Conclusion. In our
study, increased thrombin generation that resulted in elevated D-dimer levels
may be one of the contributing factors to the prethrombotic state in patients
with hyperprolactinemia. [Projekat Ministarstva nauke Republike Srbije, br.
175033 i br. 174016]
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