THU035 Impact Of Surgery Or Medical Treatment With The Selective Glucocorticoid Receptor Modulator Relacorilant On Hypercoagulopathy In Patients With Cushing Syndrome

Disclosure: C. Simeoli: None. N. Di Paola: None. A. Stigliano: None. P. Lardo: None. T. Kearney: Other; Self; Corcept Therapeutics. E. Mezosi: Grant Recipient; Self; Corcept Therapeutics. E. Ghigo: None. R. Giordano: None. C.N. Mariash: Grant Recipient; Self; Corcept Therapeutics. D. Donegan: Advisory Board Member; Self; Corcept Therapeutics. Other; Self; Corcept Therapeutics. R.A. Feelders: Consulting Fee; Self; Recordati. Grant Recipient; Self; Corcept Therapeutics. Speaker; Self; Recordati, HRA Pharma. A.L. Hand: Employee; Self; Corcept Therapeutics. A.G. Moraitis: Employee; Self; Corcept Therapeutics. R. Pivonello: Consulting Fee; Self; Corcept Therapeutics. Grant Recipient; Self; Corcept Therapeutics. In patients with Cushing syndrome (CS), hypercoagulability represents a significant concern, leading to an elevated risk for thrombotic events. Hypercoagulability persists for several months (mos) after curative surgery, and current CS treatment guidelines recommend anticoagulation therapy for up to 3 mos after surgery. In patients with Cushing disease, hemostatic parameters may even worsen after surgery, independent of surgical outcome, with improvements beginning about 3 mos after successful surgery (Casonato et al. Blood Coagul Fibrinolysis 1999). This transient worsening may be due to increased inflammation as cortisol levels, and hence cortisol’s anti-inflammatory effects, are reduced after successful surgery, leading to increased activity in the coagulation cascade, which normalizes over time. Here, we evaluate the impact of surgery or treatment with the selective glucocorticoid receptor modulator relacorilant (RELA) on the coagulation state in patients with CS, reporting findings from a retrospective, longitudinal, monocentric, surgical cohort study and an open-label phase 2 study of RELA (NCT02804750). In the surgical study, coagulation markers were assessed in 30 patients before curative surgery and in remission. In the RELA study, patients received either RELA 100-200 mg for 12 weeks or RELA 250-400 mg for 16 weeks; coagulation markers were assessed in 34 patients throughout the study. In the surgical study, baseline (BL) mean 24-h urinary free cortisol (UFC) was 615.6 mcg/day (by immunoassay; 2.1x upper limit of normal [ULN]); mean and median time to hemostasis assessment after remission were 6.2 and 6 mos, respectively. Significant mean changes from BL were observed in activated partial thromboplastin time (aPTT; +2.0 sec, P=0.031), factor VIII (fVIII; -24.2%, P=0.044), and von Willebrand factor (vWF; -20.6%, P=0.018), whereas platelet count was unchanged. In the RELA study, BL mean UFC was 211.9 mcg/day (by tandem mass spectrometry; 4.2x ULN). Similar to the surgical study, significant mean changes from BL to last observed visit were reported in aPTT (+1.5 sec, P=0.046), fVIII (-18.9%, P=0.022), and platelet count (-68.8*10(9)/L, P<0.0001), while vWF was unchanged. Significant improvements in other coagulation factors, eg, fIX and fX, were seen in patients with abnormal values at BL. These studies showed that coagulation markers in patients with CS improve 6 mos after curative surgery, and that treatment with RELA may have similar effects after 3-4 mos. The previously observed transient increase in fVIII immediately after surgery was absent with RELA, where negative mean changes from BL were seen throughout the study. This is presumably due to the less abrupt reduction of cortisol activity with RELA compared to surgery. RELA’s effects on hypercoagulopathy support further investigation of preoperative use and in patients with CS who are not eligible for surgery. Presentation: Thursday, June 15, 2023