Spinal Cord Stimulation Therapy for Hereditary Spastic Paraplegias Patients

Sponsor

Xuanwu Hospital, Beijing (Other)

Overall Status

Recruiting

CT.gov ID

NCT05196178

Collaborator

(none)

Enrollment

Location

Arm

24.5

Anticipated Duration (Months)

0.5

Patients Per Site Per Month

Study Details

Study Description

Brief Summary

It's a single-center, prospective, open label clinical study with a 12 months follow-up period, to investigate the therapeutic effect and safety of spinal cord stimulation (SCS) on motor function and gait in patients with pure Hereditary Spastic Paraplegias.

Condition or Disease	Intervention/Treatment	Phase
Motor Function Gait	Procedure: Spinal cord stimulation	N/A

Detailed Description

Pure hereditary spastic paraplegia is a heterogeneous group of genetic disorders characterized by degeneration of the corticospinal tracts, coursing with progressive weakness and spasticity of the lower limbs. The available anti spastic agents and surgical procedures involving anti-spastic systemic drugs, botulinum toxin, intrathecal baclofen, and even selective dorsal rhizotomy have not shown an improvement in muscle strength. Physical rehabilitation alone has shown positive results in short term, but this effect tends to fade away in few months.To date, there are no effective treatments for progressive deficits or disease-modifying therapy for Hereditary spastic paraplegia patients,

Spinal cord stimulation is a wellestablished therapy for the treatment of chronic neuropathic pain. Recently, some pilot studies demonstrated encouraging results of SCS in improving motor function. Patients severely affected by spinal cord injury experienced enhancements in leg movements and Parkinson's disease, primary progressive freezing of gait, and multiple system atrophy with predominant parkinsonism patients improved gait performance and freezing of gait after spinal cord stimulation by inducing changes in spinal and brain circuitry function. Some case studies suggest spinal cord stimulation may delay motor worsening and be innovative lines of research for the treatment of spastic paraplegia. However, evidence from larger numbers of subjects is still lacking. The objective of this study is to investigate the therapeutic effect and safety of spinal cord stimulation on motor function and gait in patients with pure hereditary spastic paraplegias

It's a single-center, prospective, open label clinical study with a 12 months follow- up period. The intended study population is individuals suffering from pure hereditary spastic paraplegia.Each participant will complete an enrollment/ screening/baseline visit, a spinal cord stimulation implant and activation visit, and a minimum of two follow-up visits, including visit at 3 months and the final study visit at 12months. The participants will proceed to implantation after satisfying implant inclusion and exclusion criteria. Paddle-shaped Spinal cord stimulation electrode with 16 contacts ((AdaptiveStim 39, 565; Medtronic, Minneapolis, USA) will be implanted into the epidural space at the thoracic levels ranging from T10 to T12. Electrode position will be verified by X-ray. The stimulators will be turned on within 1 month after electrode implantation surgery (slightly below sensory threshold). The stimulation parameters could vary freely, but medications will be kept constant during the study period. At the end of month 12, participants will enter the long-term follow-up in which medications and stimulation parameters could vary freely.

Study Design

Study Type:

Interventional

Anticipated Enrollment :

12 participants

Allocation:

N/A

Intervention Model:

Single Group Assignment

Masking:

None (Open Label)

Primary Purpose:

Treatment

Official Title:

Effects of Spinal Cord Stimulation Therapy on Motor Function and Gait in Patients With Pure Hereditary Spastic Paraplegias

Actual Study Start Date :

Nov 15, 2021

Anticipated Primary Completion Date :

Dec 1, 2023

Anticipated Study Completion Date :

Dec 1, 2023

Arms and Interventions

Arm	Intervention/Treatment
Experimental: Spinal cord stimulation therapy Spinal cord stimulation at the thoracic levels ranging from T10 to T12.	Procedure: Spinal cord stimulation Paddle-shaped Spinal cord stimulation electrode with 16 contacts (AdaptiveStim® 39, 565;Medtronic, USA) will be implanted into the epidural space at the thoracic levels ranging from T10 to T12.

Arm

Intervention/Treatment

Experimental: Spinal cord stimulation therapy

Spinal cord stimulation at the thoracic levels ranging from T10 to T12.

Procedure: Spinal cord stimulation

Paddle-shaped Spinal cord stimulation electrode with 16 contacts (AdaptiveStim® 39, 565;Medtronic, USA) will be implanted into the epidural space at the thoracic levels ranging from T10 to T12.

Outcome Measures

Primary Outcome Measures

change in spastic paraplegia rating scale(SPRS) [twelve months after surgery]
demonstrate the statistically significant improvement in score of spastic paraplegia rating scale(SPRS) from baseline( Off medication) to 12 months(On stimulation/Off medication); The score of SPRS ranges from 0 to 52, higher scores mean a worse outcome .

Secondary Outcome Measures

change in the score of Modified Ashworth Scale [twelve months after surgery]
demonstrate statistically significant improvement in score of Modified Ashworth Scale from baseline( Off medication) to 12 months(On stimulation/Off medication); The score of Modified Ashworth Scale ranges from 0 to 4, higher scores mean a worse outcome.
change in Activities of Daily Living Scale (ADL) [twelve months after surgery]
demonstrate statistically significant improvement in score of Activities of Daily Living Scale (ADL) from baseline to 12 months. The score of ADL ranges from 0 to 100, higher scores mean a better outcome.
change in Tinetti Balance and Gait Analysis [twelve months after surgery]
demonstrate statistically significant improvement in the score of Tinetti balance and gait analysis from baseline( Off medication) to 12 months(On stimulation/Off medication); The score of Tinetti balance and gait ranges from 0 to 28, higher scores mean a better outcome.
change in Berg Balance Scale(BBS) [twelve months after surgery]
demonstrate statistically significant improvement in score of Berg Balance Scale(BBS) from baseline( Off medication) to On stimulation/Off medication state at 12 months. BBS ranged from 0 to 56, higher scores mean a better outcome.
Clinical Global Impression-Global Improvement [twelve months after surgery]
Evaluations will performed in off-stimulation and in on-stimulation conditions at 12 months after surgery on the basis of the physician's assessment, as well as on the basis of the patients'selfreported satisfaction. It is rated on a 7-point scale, range from 1(very much improved) through to 7 (very much worse)

Eligibility Criteria

Criteria

Ages Eligible for Study:

14 Years to 70 Years

Sexes Eligible for Study:

All

Accepts Healthy Volunteers:

Inclusion Criteria:

aged between 14 and 70 years
patients with pure hereditary spastic paraplegias
with progressive weakness and spasticity of the lower limbs, and the gait dysfunction treatable by medication but not adequately controlled with medications
Understand potential risk/benefit, consent to the study, study procedures, and agree to complete the study follow-up visits and comply with the study protocol requirements.

Exclusion Criteria:

cognitive impairment ( MMSE≤24), depression (HAMD>24),acute psychosis, active alcohol or drug abuse, terminal illness, and any major medical or psychological histories, diagnoses, conditions, or comorbidities that would interfere with participation in the study per the investigatior's medical judgment
surgical or medical contraindications to spinal cord stimulation surgery(e.g. uncontrolled hypertension, advanced coronary artery disease).