title: The effect of hormone therapy and tibolone on serum CD40L and ADAM-8 in healthy post-menopausal women.
abstract: OBJECTIVE
  The role of neutrophils and platelets in atherothrombotic disease is well established. The aim of our study was to investigate the effect of HT and tibolone on the soluble markers of neutrophil and platelet activation, "a disentigrin and metalloproteinase domain" (ADAM-8) and CD40 ligand (CD40L) respectively, in healthy post-menopausal women.
  
  
  METHODS
  One hundred and six healthy post-menopausal women were randomly allocated to: estradiol plus drospirenone (E₂/DSP), E₂ hemihydrate 1 mg plus norethisterone acetate (E₂/NETA) 0.5 mg, and tibolone 2.5 mg. Serum ADAM-8 and CD40L were measured at baseline and at 6 months.
  
  
  RESULTS
  Baseline values of ADAM-8 and CD40L were similar between groups. No significant correlation was revealed between ADAM-8 or CD40L and parameters related to cardiovascular risk factors in each group. No significant changes were observed between baseline values and values at 6 months (E₂/DSP group: ADAM-8: 267.4±71.3 pg/ml vs 270.7±42.8 pg/ml, p=0.86, CD40L: 6.43±3.13 vs 6.79±2.70 ng/ml, p=0.67), (E₂/NETA group: ADAM-8: 308.3±64.3 vs 294.7±57.7 pg/ml, p=0.40, CD40L: 9.68±2.81 vs 8.59±5.13 ng/ml, p=0.51), (tibolone group: ADAM-8: 307.5±87.5 vs 289±48.1 pg/ml, p=0.48, CD40L: 9.46±4.30 vs 9.26±4.60 ng/ml, p=0.99).
  
  
  CONCLUSIONS
  Our study has not revealed an association between estrogen plus progestin treatment or tibolone on serum ADAM-8 and CD40L levels in healthy post-menopausal women. Larger prospective studies are needed to further investigate the effect of low-dose HT or tibolone on serum markers of neutrophil and platelet activation.
authors.affiliation: 2nd Department of Obstetrics and Gynecology, University of Athens, Aretaieion Hospital, Athens, Greece.
authors.forename: I
authors.initials: I
authors.lastname: Lambrinoudaki
authors.forename: M
authors.initials: M
authors.lastname: Karaflou
authors.forename: G
authors.initials: G
authors.lastname: Kaparos
authors.forename: O
authors.initials: O
authors.lastname: Grigoriou
authors.forename: A
authors.initials: A
authors.lastname: Alexandrou
authors.forename: C
authors.initials: C
authors.lastname: Panoulis
authors.forename: E
authors.initials: E
authors.lastname: Logothetis
authors.forename: M
authors.initials: M
authors.lastname: Creatsa
authors.forename: G
authors.initials: G
authors.lastname: Christodoulakos
authors.forename: E
authors.initials: E
authors.lastname: Kouskouni
mesh_terms: D051722:ADAM Proteins / Q000097:blood*; D000328:Adult; D000726:Androgen Antagonists / Q000494:pharmacology / Q000627:therapeutic use; D000736:Androstenes / Q000008:administration & dosage; D023201:CD40 Ligand / Q000097:blood*; D004958:Estradiol / Q000008:administration & dosage; D015914:Estrogen Replacement Therapy; D005260:Female; D006262:Health; D006801:Humans; D008565:Membrane Proteins / Q000097:blood*; D008593:Menopause / Q000097:blood* / Q000187:drug effects; D008875:Middle Aged; D009640:Norethindrone / Q000008:administration & dosage / Q000031:analogs & derivatives; D000077563:Norethindrone Acetate; D009652:Norpregnenes / Q000494:pharmacology* / Q000627:therapeutic use; D045167:Progesterone Congeners / Q000008:administration & dosage
chemical_list: D000726:Androgen Antagonists; D000736:Androstenes; D008565:Membrane Proteins; D009652:Norpregnenes; D045167:Progesterone Congeners; D023201:CD40 Ligand; D004958:Estradiol; D000077563:Norethindrone Acetate; D051722:ADAM Proteins; C068490:ADAM8 protein, human; C027385:tibolone; C035144:drospirenone; D009640:Norethindrone