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CompletedNCT01713361Updated Aug 27, 2014

Active Comparator-Controlled Study to Assess Safety and Efficacy of ISIS-FXIRx in Total Knee Arthroplasty

A Phase 2 interventional study of ISIS-FXIRx Dose #2 and ISIS-FXIRx Dose #3 in Venous Thromboembolism, sponsored by Ionis Pharmaceuticals, Inc.. Completed at 21 sites in 5 countries. Open to participants aged 18 Years to 80 Years. Per ClinicalTrials.gov, last updated 2014-08-27.

Sponsored by Ionis Pharmaceuticals, Inc. · Phase 2, Interventional, and Prevention

Phase
Phase 2
Study type
Interventional
Enrollment
315
Allocation
Randomized
Ages
18 Years to 80 Years
Sex
All
01

Study summary

The purpose of this study is:

  • To assess the safety and efficacy profile of ISIS-FXIRx, including incidence of bleeding and VTE, in patients undergoing total knee arthroplasty.
  • To compare the efficacy and safety profile of ISIS-FXIRx in patients who achieve less than or equal to 0.2 U/mL FXI activity levels to that of enoxaparin.
02

Conditions studied

  • Venous Thromboembolism

Keywords

  • total knee arthroplasty
  • Prophylaxis
03

In context

Thromboembolism

818 studies on the registry are indexed under Thromboembolism; 98 are open to participants now.

This study's enrollment of 315 is above the median of 196 across 436 interventional studies indexed under Thromboembolism.

Browse Thromboembolism studies →

Lead sponsor

Ionis Pharmaceuticals, Inc. is the lead sponsor of 116 studies on the registry; 10 are open to participants now.

Of its 48 completed or terminated interventional studies of FDA-regulated products, 21 (44%) have results posted.

Counted across the registry records on this site, refreshed daily.

04

Who can participate

Ages eligible
18 Years to 80 Years
Sexes eligible
All
Accepts healthy volunteers
No

Inclusion criteria

  • Give written informed consent
  • Females must be non-pregnant and non-lactating, and either surgically sterile or post-menopausal. Males must be surgically sterile, abstinent, or if engaged in sexual relations of child-bearing potential, must use contraception
  • Undergoing elective, primary unilateral total knee arthroplasty

Exclusion criteria

Exclusion Criteria:

  • Body weight \<50 kg
  • Patients at increased risk of bleeding. History of intracranial or intraocular bleeding. History of gastrointestinal and/or endoscopically verified ulcer disease within the past year.
  • History of excessive intra- or direct post operative bleeding or a traumatic spinal or epidural anesthesia
  • Brain, spinal, or ophthalmologic surgery within the past 3 months
  • History of clinically significant liver disease in the past year
  • Screening laboratory results as follows, or any other clinically significant abnormalities in screening laboratory values

    • aPTT or PT or INR >ULN
    • Factor IX activity \<LLN
    • Factor VIII activity, vWF antigen or Ristocetin cofactor activity \<0.5 U/mL
    • FXI activity \<0.3 U/mL
    • Urine protein or blood persistently positive by dipstick. In the event of positive test results, eligibility may be confirmed with urine microscopy or 24 hour urine protein measurement as applicable
    • ALT or AST >1.5 x ULN
    • Total bilirubin >ULN
    • Platelet count \<150,000 (or history of thrombocytopenia)
  • Hypersensitivity to enoxaparin
  • Anticipated concomitant use of anticoagulants/antiplatelet agents or the NSAID nimesulide that may affect study outcome or any other drug influencing coagulation (except low dose aspirin and short acting NSAIDs with a half-life \<20 hours) at least 7 days before surgery or during treatment with ISIS Rx.
  • Anticipated use of indwelling intrathecal or epidural catheters
  • Anemia at Screening
  • Have any other conditions which could interfere with the patient participating in or completing the study
05

Study design

Phase
Phase 2
Primary purpose
Prevention
Allocation
Randomized
Intervention model
Parallel assignment
Masking
None (open label)
Enrollment
315 participants (actual)

Study arms

  • Experimental
    ISIS-FXIRx Dose 2

    Group B: ISIS-FXIRx Dose #2

    Drug: ISIS-FXIRx Dose #2

  • Experimental
    ISIS-FXIRx Dose 3

    Group C: ISIS-FXIRx Dose #3

    Drug: ISIS-FXIRx Dose #3

  • Active comparator
    Enoxaparin

    Enoxaparin (40mg)

    Drug: Enoxaparin

Interventions

  • DrugISIS-FXIRx Dose #2

    Group B: ISIS-FXIRx dose #2 subcutaneously administered 7 times prior to total knee arthroplasty, and 2 times after surgery.

    Also known as: ISIS-FXIRx

  • DrugISIS-FXIRx Dose #3

    Group C: ISIS-FXIRx dose #3 subcutaneously administered 7 times prior to total knee arthroplasty, and 2 times after surgery.

    Also known as: ISIS-FXIRx

  • DrugEnoxaparin

    Enoxaparin (40mg) will be administered by subcutaneous injection the evening prior to total knee arthroplasty (optionally), 6 to 8 hours after surgery, followed by daily injections for at least 8 additional days post surgery (a total of at least 9 consecutive days). \[Except for Canadian region, in which the subcutaneous injection of enoxaparin the evening prior to total knee arthroplasty is expected, resulting in a total of at least 10 consecutive days of enoxaparin.\]

    Also known as: Lovenox, Clexane

06

What researchers measure

Primary outcomes

  1. Primary efficacy outcome

    Composite of asymptomatic DVT (via bilateral venography), and symptomatic VTE, fatal PE, and unexplained death.

    Time frame: up to 12 days post-surgery

Secondary outcomes

  1. Secondary efficacy outcome

    All DVTs and PEs up to 4 weeks after bilateral venography

    Time frame: 1st dose to up to Day 76

07

Study locations

21 sites
  • Isis Investigational Site
    Plovdiv, 4002, Bulgaria
  • Isis Investigational Site
    Rousse, 7002, Bulgaria
  • Isis Investigational Site
    Sofia, 1527, Bulgaria
  • Isis Investigational Site
    Ajax, Ontario LIS 2J4, Canada
  • Isis Investigational Site
    Oshawa, Ontario LIG 2B9, Canada
  • Isis Investigational Site
    Adazi, LV 2164, Latvia
  • Isis Investigational Site
    Riga, LV 1004, Latvia
  • Isis Investigational Site
    Valmiera, LV4201, Latvia
  • Isis Investigational Site
    Chelyabinsk, 454026, Russian Federation
  • Isis Investigational Site
    Orenburg, 460000, Russian Federation
  • Isis Investigational Site
    Saint Petersburg, 193312, Russian Federation
  • Isis Investigational Site
    Saint Petersburg, 194291, Russian Federation
  • Isis Investigational Site
    Saint Petersburg, 194354, Russian Federation
  • Isis Investigational Site
    Samara, 443095, Russian Federation
  • Isis Investigational Site
    Yaroslavl, 150047, Russian Federation
  • Isis Investigational Site
    Cherkassy, 18009, Ukraine
  • Isis Investigational Site
    Ivano-Frankivsk, 76000, Ukraine
  • Isis Investigational Site
    Kharkiv, 61024, Ukraine
  • Isis Investigational Site
    Kyiv, 01107, Ukraine
  • Isis Investigational Site
    Odessa, 65025, Ukraine
  • Isis Investigational Site
    Sevastopol, 99018, Ukraine
08

References and documents

Publications

  • Buller HR, Bethune C, Bhanot S, Gailani D, Monia BP, Raskob GE, Segers A, Verhamme P, Weitz JI; FXI-ASO TKA Investigators. Factor XI antisense oligonucleotide for prevention of venous thrombosis. N Engl J Med. 2015 Jan 15;372(3):232-40. doi: 10.1056/NEJMoa1405760. Epub 2014 Dec 7. PubMed 25482425 ↗
09

Updates

Tracking since Sep 25, 2026
No changes since tracking began. The registry record was last updated on Aug 27, 2014, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
10

Registry details

Key details

Study ID
NCT01713361
Lead sponsor
Ionis Pharmaceuticals, Inc.
Responsible party
Sponsor
First posted
Oct 24, 2012
Start date
Oct 2012
Primary completion
May 2014
Completion
Aug 2014
Last update
Aug 27, 2014

Study contacts

Sanjay Bhanot, MD, PhD
study director · VP, Clinical Development, Isis Pharmaceuticals

Oversight

Data monitoring committee
Yes
View the source record on ClinicalTrials.gov ↗

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This study is completed, as verified in Aug 2014. You cannot join it, but the record below documents what was studied.

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