Replacement therapy with levothyroxine modulates platelet activation in recent-onset post-thyroidectomy subclinical hypothyroidism

Mauro Boscherini, Angelina Barini, Angelina Barini, Rocco Domenico Alfonso Bellantone, Celestino Pio Lombardi, Annamaria D'Amore, Giulia Carnassale, G. Desideri, S. Necozione

Risultato della ricerca: Contributo in rivistaArticolo in rivista

1 Citazioni (Scopus)

Abstract

Background and aim Subclinical hypothyroidism has been linked to increased risk of atherosclerotic disease. Soluble CD40 ligand (sCD40L), mainly derived from activated platelets, and the lipid peroxidation product 8-iso-prostaglandin F2α(8-iso-PGF2α) are known to play a relevant pathophysiological role in atherogenesis. In this study, we analyzed the relationship between thyroid hormones and circulating levels of sCD40L and 8-iso-PGF2αin patient with recent-onset post-thyroidectomy subclinical hypothyroidism under replacement therapy. Methods and results Circulating levels of thyroid hormones, sCD40L, and 8-iso-PGF2αwere assessed in 40 recently thyroidectomized patients (33 females, mean age 52.0 ± 11.7 years) at baseline (5–7 day after surgery) and after 2 months under replacement therapy with levothyroxine (LT-4). At baseline, circulating levels of thyroid hormones were indicative of a subclinical hypothyroidism (TSH 7.7 ± 3.9 μU/mL, FT3 1.8 ± 0.6 pg/mL, and FT3 8.9 ± 3.0 pg/mL). Circulating levels of sCD40L and 8-iso-PGF2αwere directly correlated with each other (r = 0.360, p = 0.023) and with TSH levels (r = 0.322, p = 0.043 and r = 0.329 p = 0.038, respectively). After 2 months under the replacement therapy with LT-4 circulating levels of TSH (from 7.7 ± 3.9 to 2.7 ± 2.8 μU/mL, p < 0.0001), sCD40L (from 6.11 ± 2.41 to 2.43 ± 2.00 ng/mL, p < 0.0001) and 8-iso-PGF2α(from 45.33 ± 6.94 to 40.36 ± 6.20, p < 0.0001) significantly decreased. Changes in circulating levels of sCD40L and 8-iso-PGF2αwere directly correlated with each other (r = 0.349 p = 0.028) and with changes in TSH levels (r = 0.367 p = 0.020 and r = 0.339 p = 0.032, respectively). Conclusion Our study suggests an influential role of TSH on proatherogenic activation of platelets, probably through enhanced lipid peroxidation. These findings could partially explain the increased susceptibility of patients with subclinical hypothyroidism to develop atherosclerotic disease.
Lingua originaleEnglish
pagine (da-a)896-901
Numero di pagine6
RivistaNMCD. NUTRITION METABOLISM AND CARDIOVASCULAR DISEASES
Volume27
DOI
Stato di pubblicazionePubblicato - 2017

Keywords

  • Adult
  • Asymptomatic Diseases
  • Biomarkers
  • Blood Platelets
  • CD40 Ligand
  • Cardiology and Cardiovascular Medicine
  • Dinoprost
  • Endocrinology, Diabetes and Metabolism
  • Female
  • Hormone Replacement Therapy
  • Humans
  • Hypothyroidism
  • Isoprostanes
  • Lipid Peroxidation
  • Male
  • Medicine (miscellaneous)
  • Middle Aged
  • Nutrition and Dietetics
  • Platelet Activation
  • Platelet activation
  • Thyroid hormones
  • Thyroidectomy
  • Thyrotropin
  • Thyroxine
  • Time Factors
  • Treatment Outcome
  • sCD40 ligand

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