Interventions for Reading Disabilities in NF1

Neurofibromatosis Type 1 Clinical Trial

Official title:

Neurobiology and Treatment of Reading Disability in NF1

Clinical Trial Details — Status: Recruiting

Administrative data

• NCT number: NCT02964884
• Other study ID #: 161159
• Secondary ID: 1R01HD089474-01
• Status: Recruiting
• Phase: Phase 2
• Start date: November 2016
• Est. completion date: July 2026

Study information

• Verified date: June 2024
• Source: Vanderbilt University
• Contact: Julie Delheimer, BS
• Phone: 615-875-5534
• Email: educationbrain[@]vanderbilt.edu
• Is FDA regulated: No
• Study type: Interventional

Clinical Trial Summary

Neurofibromatosis Type 1 (NF1) is a common genetic disorder that is associated with a four times greater risk of learning disabilities, including reading disabilities, and a deficiency of neurofibromin - a protein important in a signaling pathway that regulates learning and memory. Our previous work (NS49096) demonstrated that school-age children with NF+RD can respond to standard phonologically-based reading tutoring originally developed to treat reading disability in the general population. Combining our work with that by other researchers suggesting that a medication (Lovastatin) may counteract the effects of the deficient neurofibromin, and possibly ameliorate learning disabilities in NF1, the investigator propose to examine the synergistic effects of medication plus reading tutoring.

Description:

Neurofibromitosis Type 1 (NF1) is a common autosomal dominant neurocutaneous syndrome. The most common concern of NF1 is learning disabilities (LDs). Approximately half of children with NF1 have LDs, the most common of which are reading disabilities (RDs).The purpose of this research is to gain a deeper understanding of the characteristics and treatment of RDs in NF1.

The Investigator will evaluate four different groups (see list below) to determine if there are differential outcomes in these groups of children with NF+RD. The first two groups will consist of NF1 patients, and the second two groups will consist of participants with RDs but without NF1.

1. Reading tutoring program and a medication called Lovastatin (NF1 patients)

2. Reading tutoring program and no Lovastatin (placebo) (NF1 patients)

3. Reading tutoring program (RD participants)

4. Other Academic "Sham" tutoring (eligible to receive reading tutoring after study participation is complete) (RD participants)

Recruitment information / eligibility

• Status: Recruiting
• Enrollment: 120
• Est. completion date: July 2026
• Est. primary completion date: May 2026
• Accepts healthy volunteers: Accepts Healthy Volunteers
• Gender: All
• Age group: 8 Years to 20 Years

Eligibility

Inclusion Criteria:

This study will be open to all English speakers who meet eligibility criteria regardless of race, gender, minority or socioeconomic status. Inclusion criteria to be met are listed below:

1. Individuals ages 8-20 (all participants)

2. Documented NF-1 (NF patients only)

3. If female, participant is post-menarche (NF patients only)

4. If male, participant has reached Tanner Stage 2 (NF patients only)

5. Participant able to swallow capsule (NF patients only, may be confirmed via swallowability test, described below)

6. Participant's English is sufficient for school (all participants)

7. Participant must either answer "yes" to question A, or answer "yes" to at least 2 items for questions B-D listed below:

A. Has your child ever been diagnosed with a reading disability? B. Did your child have trouble learning how to "sound out" words? C. Have you (parent) ever been concerned about your child's reading ability? D. Did the school or teacher ever express any concerns about your child's reading ability? Swallowability Assessment: We may ask patients to perform a capsule swallowability assessment prior to enrollment. We will ask subjects to attempt to swallow an empty capsule, matching the same size of the Lovastatin 20mg and 40mg capsules to be used in the study, to confirm swallowability. Patients will be provided with up to 2 capsules as needed to successfully perform the swallowability assessment. If the patient is unable to swallow the capsule, enrollment in the study may deferred or declined.

A child will be excluded if he/she meets any of the following criteria, which will be determined by initial telephone screening as well as review of medical/developmental history prior to and during testing:

1. Child 7 years of age or less;

2. known uncorrectable visual impairment;

3. documented hearing impairment greater than or equal to a 25 dB loss;

4. medical contraindication to MRI procedures (e.g., metal devices);

5. any psychiatric, behavioral, or developmental disorder that would preclude active participation in in-depth tutoring sessions

6. Pregnant at time of screening.

7. Known conditions which are contraindicated to Lovastatin

1. Hypersensitivity to the medication

2. Uncontrolled Epilepsy

3. Metabolic Syndrome X, High Blood Sugar,

4. Muscle Damage Due to Autoimmunity

5. Stroke caused by Bleeding in the Brain, Loss of Memory,

6. Severely Low Blood Pressure

7. Liver Problems including Abnormal Liver Function Tests

8. Severe Renal Impairment,

9. Serious Muscle Damage that may Lead to Kidney Failure,

10. Recent Operation or significant Injury

11. Muscle Pain or Tenderness with Increase Creatinine Kinase,

12. Habit of Drinking Too Much Alcohol

13. Pregnant or lactating. - Lovastatin is contraindicated during pregnancy and in nursing mothers because it decreases synthesis of cholesterol and other products of the cholesterol biosynthesis pathway that are essential components for fetal development.

Children who meet criteria for ADHD, Oppositional Defiant Disorder, adjustment disorder, and/or mild depression will be eligible as long as they are not taking psychotropic medications, with the exception of stimulant medication for ADHD.

For pilot participants only:

Criteria for inclusion/exclusion for pilot participants is outlined below. Children who meet criteria for ADHD, Oppositional Defiant Disorder, adjustment disorder, and/or mild depression will be eligible as long as they are not taking psychotropic medications, with the exception of stimulant medication for ADHD.

1. Children ages 8-17

2. Participant is a native English speaker

3. Participant must either answer "yes" to question A, or answer "yes" to at least 2 items for questions 2-4 listed below:

A. Has your child ever been diagnosed with a reading disability? B. Did your child have trouble learning how to "sound out" words? C. Have you (parent) ever been concerned about your child's reading ability? D. Did the school or teacher ever express any concerns about your child's reading ability?

A child will be excluded if he/she meets any of the following criteria, which will be determined by initial telephone screening as well as review of medical/developmental history prior to and during testing:

1. Children 7 years of age or younger

2. previous diagnosis of Intellectual Disability;

3. known uncorrectable visual impairment;

4. documented hearing impairment greater than or equal to a 25 dB loss;

5. medical contraindication to MRI procedures (e.g., metal devices);

6. known IQ below 70;

7. a pervasive developmental disorder; and

8. any known neurologic pathology, including epilepsy, spina bifida, cerebral palsy, traumatic brain injury, optic gliomas, and brain tumors (other than UBOs).

9. Comorbid severe psychiatric disorders will also be excluded.

Related Conditions & MeSH terms

• Dyslexia
• Learning Disabilities
• Learning Disability
• Neurofibroma
• Neurofibromatoses
• Neurofibromatosis 1
• Neurofibromatosis Type 1
• NF1
• Reading Disability

Intervention

Drug:
• Lovastatin
Those in the Lovastatin group will receive 20mg of Lovastatin per day for the first two weeks and 40mg of Lovastatin per day starting at week 3 through week 11.

Behavioral:
• reading tutoring intervention
After the initial 12 weeks of Lovastatin or placebo, children will return for one week of intensive, one-on-one tutoring intervention (either reading or sham; Visit 2)

Drug:
• Placebo Oral Tablet
Those in the placebo group will receive a tablet daily

Behavioral:
• Other Academic "sham" tutoring
No reading (sham) tutoring. Children will receive intensive tutoring on a subject other than reading.

Locations

Country	Name	City	State
United States	Vanderbilt University	Nashville	Tennessee

Sponsors (2)

Lead Sponsor	Collaborator
Vanderbilt University	Eunice Kennedy Shriver National Institute of Child Health and Human Development (NICHD)

Country where clinical trial is conducted

United States, 

Outcome

Type	Measure	Description	Time frame	Safety issue
Primary	Woodcock Johnson Tests of Achievement IV	WJ-IV (Forms A and B) Letter Word Identification, Word Attack, and Passage Comprehension subtests will be administered in order to assess word recognition accuracy, decoding accuracy, and comprehension.	24 weeks
Primary	Woodcock Reading Mastery Test-III	(WRMT-III; Forms A and B); Word Identification, Word Attack, and Passage Comprehension will be administered to assess word recognition accuracy, decoding accuracy, and comprehension. The WRMT-III and WJ-III correlate at .87, and at the item level show similar characteristics (e.g., containing 31% and 34% multisyllabic words, respectively).	24 weeks
Primary	Test of Word Reading Efficiency-2	(TOWRE-2; Forms A, B, C, D) Sight Word Efficiency and Pseudoword Decoding will be used to assess real and pseudoword reading speed.	24 weeks
Primary	Experimental Word and Pseudoword Lists	At each visit, 2 word and 2 pseudoword lists (20 words each) will be administered. Word lists are matched on relevant characteristics (e.g., frequency, bigram frequency). Real word lists have already been developed and tested, and show high inter-correlations (r =.87-.97).	24 weeks
Primary	Test of Silent Contextual Reading Fluency-2	(TOSCRF-2; 91; Forms A, B, C, D). This test requires identifying as many words as possible in 3 min within a sentential context.	24 weeks
Primary	Comprehensive Test of Phonological Processing-2	CTOPP-2 core subtests will be used to assess phonological processing, a known predictor of decoding and word recognition.	24 weeks
Primary	Delis Kaplan Executive Function System	Sorting from the D-KEFS will be used to assess higher-level planning and shifting abilities.	24 weeks
Primary	Visuospatial Learning and Memory, Morris Water Maze	The child "hops" from square to square in the grid, repeated from various starting points. After landing on the target square, a fun goal pops up. The number of "hops" to reach the goal is measured. A control probe trial is given in which there is no goal.	24 weeks
Primary	Visuospatial Learning and Memory, Judgment of Line Orientation	(JLO, Forms J and H)98 requires the judgment of spatial relationships between two lines compared to a reference of a protractor-like half-circle of 11 lines. The Investigator will create 4 forms from the two already existing by splitting each test in half by selecting every other item, a method used by others (Leach et al., 2003). This will allow us to generate 4 different versions of the JLO.	24 weeks
Primary	Clinical Evaluation of Language Fundamentals-Fifth Edition	CELF-5 will be used to assess aspects of oral language (e.g., syntax, semantics, & working memory).	24 weeks