HealthCare Journey for Multiple Sclerosis
  • Home
  • About Us
  • Virtual MS Center
    • Q & A for Virtual MS Center
    • Read About Our Virtual MS Center Staff
  • News & Resources
  • Seminar Registration
  • Health & Wellness
  • Blogs
    • Physician Blog >
      • Healthcare Provider Blog
    • Physical Therapy Blog
    • Patient Blog
    • Caregiver Blog
    • Research Blogs >
      • "Ask Dr. Debbie" Research Blog
      • Multiple Perspectives In Multiple Sclerosis Research Blog
  • About MS
    • What is MS?
    • Diagnosis
    • Treatment
    • MS Tips
  • Symptoms
    • Balance and Walking Issues
    • Breathing/Respiratory
    • Bowel Dysfunction
    • Cognitive Dysfunction
    • Crying/Laughing Uncontrollably (PBA)
    • Depression and Anxiety
    • Dizziness/Vertigo
    • Dysphagia
    • Fatigue
    • Foot Drop
    • Hearing or Smell or Taste Changes
    • Heat Sensitivity
    • Leg Weakness
    • Loss of Hand Dexterity and Coordination
    • Memory and Mutliple Sclerosis
    • Migraines
    • Numbness/Tingling/Altered Sensation
    • Nystagmus and Oscillopsia
    • Pain
    • Sexual Dysfunction
    • Sleep Issues
    • Spasticity/Spasms/Cramps
    • Speech/Swallowing
    • Urination/Bowel Problems
    • Vision
  • MS Clinics
  • MS Topics
    • Pregnancy and Infertility
    • Caregivers and Family Members
    • Employment and MS
    • Medical Costs and Insurance
    • Pediatric Multiple Sclerosis
  • Register With Us
  • Terms of Use/Privacy/HIPAA
  • MS HealthCare Journey

Welcome to the Virtual MS Center!

Ask any question you want about Multiple Sclerosis and one of our experts will answer it as soon as possible.
CLICK HERE TO ASK YOUR QUESTION!

Are there studies proving the Tysabri PML “Risk Factor” is reduced by extending dosing intervals to 8 weeks or more?

10/27/2018

 
Here is My Question:
Are there studies proving the Tysabri PML “Risk Factor” is reduced by extending dosing intervals to 8 weeks or more?

I selfishly ask: I was JC positive when starting Tysabri 8/2006. I had 132 TOTAL infusions 8/2006 to 5/2018 including 2 "Breaks" Break #1 was 7/2008 for 3 months, restarted 10/2008; #2 was 11/2011 for 8 months, restarted 7/2012. 

Break #2 was originally planned as permanent because 7/2012 LP found JCV antibodies in my CSF. I accepted risks compared to personal benefits from treatment and restarted Tysabri 7/2012. Last LP and CSF test 7/2013 was “normal.” Six month Tysabri protocol MRI’s show little change; symptoms stable and no flare ups. 

Began 5 week intervals in 2017 and 6 week intervals in 2018. JC titer range .5 to .8 through 1/2018. However “titer risk” increased 5/2018 to 1.25 and 10/2018 to 1.68. With more than 72 months of treatments and titers of 1.25 and 1.68 the “Risk Factor” table* shows PML risk of 1 in 333 and 1 in 100 respectively. SO…..

--Are the only tested and reliable risk tables based on frequency of treatments every 4weeks (13x annually) ?
--Has Biogen or any trustworthy entity created a “Risk Index” for PML with Tysabri on extended dosing of 6, 8 or greater week intervals? 

I know risk of PML greater w/Tysabri than Rituxan/Ocrelus.(Lemtrada ruled out).But I’m scared of changing from Tysabri, that’s worked to a new treatment with new risks. Any and all suggestions, comments, references and ideas welcome. 

Answer:
I will refer the author of this question to a research abstract from ACTRIMS meeting earlier this year which addresses risk for PML among JCV antibody POSITIVE patients among standard dosing (4 weeks) and extended dosing (more than 4 weeks but less than 12 weeks):

https://actrims.confex.com/actrims/2018/meetingapp.cgi/Paper/3102

The study analyzed Biogen’s TOUCH Program database.  Hazard risk for PML among extended dose patients was much lower and statistically significant compared to standard dosing.

I am not aware of a separate risk table for extended dosing patients.  While this study cannot evaluate the effectiveness of extended dosing on disease activity, this has been reported at numerous scientific conferences including this month at ECTRIMS:

https://www.neurologyadvisor.com/ectrims-2018/natalizumab-extended-dosing-schedule-multiple-sclerosis-treatment-efficacy/article/806221/

Even with this welcomed data and the observation that extend dose interval confers lower PML risk without sacrificing disease control, the decision to continue on therapy must be discussed with the treating physician.  

A. Scott Nielsen MD MMSc
Neurologist and MS Specialist at Kaiser Permanente

Comments are closed.

    RSS Feed

    PLEASE NOTE: This information/opinions on this site should be used as an information source only.  This information does not create any patient-HCP relationship, and should not be used as a substitute for professional diagnosis and treatment.  Please consult your health care provider before making any healthcare decisions or for guidance about a specific medical condition.
    Read About Our Virtual MS Center Authors

    Archives

    March 2023
    February 2023
    January 2023
    December 2022
    October 2022
    September 2022
    August 2022
    June 2022
    May 2022
    April 2022
    March 2022
    February 2022
    December 2021
    November 2021
    October 2021
    September 2021
    August 2021
    July 2021
    June 2021
    May 2021
    April 2021
    March 2021
    February 2021
    January 2021
    December 2020
    November 2020
    October 2020
    September 2020
    August 2020
    July 2020
    June 2020
    May 2020
    April 2020
    March 2020
    February 2020
    January 2020
    December 2019
    November 2019
    October 2019
    September 2019
    August 2019
    July 2019
    June 2019
    May 2019
    April 2019
    March 2019
    February 2019
    January 2019
    December 2018
    November 2018
    October 2018
    September 2018
    August 2018
    July 2018
    June 2018
    May 2018
    April 2018
    March 2018
    February 2018
    January 2018
    December 2017
    November 2017
    October 2017
    September 2017
    August 2017
    July 2017
    June 2017
    May 2017
    April 2017
    March 2017
    February 2017
    January 2017
    December 2016
    November 2016
    October 2016
    September 2016
    August 2016
    July 2016
    June 2016
    May 2016
    April 2016
    March 2016
    February 2016
    January 2016
    December 2015
    November 2015
    October 2015
    September 2015
    August 2015
    July 2015
    June 2015
    May 2015
    April 2015
    March 2015
    February 2015
    January 2015
    December 2014
    November 2014
    October 2014
    September 2014
    August 2014
    July 2014
    June 2014
    May 2014
    April 2014
    March 2014
    February 2014
    January 2014
    December 2013
    November 2013
    October 2013
    September 2013
    July 2013
    June 2013

    Categories

    All
    Accessible Housing And Environmental Modifications
    Anxiety
    Balance
    Bowel Problems
    Caregivers
    Cognitive Function
    Compliance
    David Rintell Ed. D.
    Deborah Backus Blogs
    Depression
    Diagnosis
    Diet
    Dizziness
    Dosing
    Dr. Greenberg's Q&A
    Dr. Kinkel's Q&A
    Dr. Miravalle's Q&A
    Dr. Nielsen's Q&A
    Dr. Osborne's Q&A
    Exercise
    Experimental Treatments
    Eye Surgery
    Fatigue
    Fatique
    Flu Shot
    Foot Drop
    Herbs
    Immunosuppression
    JCV
    Lasik Surgery
    Lesions
    Lori Kostich's Q&A
    Lyme Disease
    Medications
    Migraines
    Mobility
    MRI
    MS Hug
    Other Diseases
    Pain
    PML
    PPMS
    Pregnancy
    Relapse
    Safety
    Sarah Wargo's Q&A
    Sexual Dysfunction
    Side Effects
    Smoking
    Spasticity
    Stem Cell Transplantation
    Steroids
    Stress
    Supplements
    Surgery
    Symptoms
    Treatment
    Urination
    Viruses
    Vision
    Vitamin D
    Vitamins
    Weakness


© 2022 HealthCare Journey, LLC. All Rights Reserved.
HealthCare Journey™ is a trademark of HealthCare Journey, LLC
Picture
  • Home
  • About Us
  • Virtual MS Center
    • Q & A for Virtual MS Center
    • Read About Our Virtual MS Center Staff
  • News & Resources
  • Seminar Registration
  • Health & Wellness
  • Blogs
    • Physician Blog >
      • Healthcare Provider Blog
    • Physical Therapy Blog
    • Patient Blog
    • Caregiver Blog
    • Research Blogs >
      • "Ask Dr. Debbie" Research Blog
      • Multiple Perspectives In Multiple Sclerosis Research Blog
  • About MS
    • What is MS?
    • Diagnosis
    • Treatment
    • MS Tips
  • Symptoms
    • Balance and Walking Issues
    • Breathing/Respiratory
    • Bowel Dysfunction
    • Cognitive Dysfunction
    • Crying/Laughing Uncontrollably (PBA)
    • Depression and Anxiety
    • Dizziness/Vertigo
    • Dysphagia
    • Fatigue
    • Foot Drop
    • Hearing or Smell or Taste Changes
    • Heat Sensitivity
    • Leg Weakness
    • Loss of Hand Dexterity and Coordination
    • Memory and Mutliple Sclerosis
    • Migraines
    • Numbness/Tingling/Altered Sensation
    • Nystagmus and Oscillopsia
    • Pain
    • Sexual Dysfunction
    • Sleep Issues
    • Spasticity/Spasms/Cramps
    • Speech/Swallowing
    • Urination/Bowel Problems
    • Vision
  • MS Clinics
  • MS Topics
    • Pregnancy and Infertility
    • Caregivers and Family Members
    • Employment and MS
    • Medical Costs and Insurance
    • Pediatric Multiple Sclerosis
  • Register With Us
  • Terms of Use/Privacy/HIPAA
  • MS HealthCare Journey