# Efficacy of iPSC-Derived Motor Neuron Cells (XS228) in Subacute Spinal Cord Injury: A Phase II Randomized Controlled Trial

Clinical trial · XellSmart Bio-Pharmaceutical (Suzhou) Co., Ltd.

- Archive id: nct:NCT06974968
- Published: 2025-05-16
- Venue: ClinicalTrials.gov
- ClinicalTrials.gov: https://clinicaltrials.gov/study/NCT06974968
- Source URL: https://clinicaltrials.gov/study/NCT06974968
- Provenance: clinicaltrials

## Abstract

Purpose: This clinical trial is studying an investigational cell therapy called XS228-a lab-made stem cell product designed to help repair damaged nerves in the spinal cord. The goal is to see if XS228 is safe and can improve movement, sensation, and function in people with recent spinal cord injuries. Study Treatment: XS228 contains specialized nerve-supporting cells derived from human stem cells. These cells are injected into the spinal fluid (intrathecal administration) in a single dose. Who Can Join? Adults aged 18-65 with a spinal cord injury (thoracic or lumbar level) that occurred 2-12 weeks before enrollment. Participants must have severe but incomplete paralysis (ASIA Impairment Scale Grade A , B or C). Study Plan: Phase II (Main Study): About 60 participants will be randomly assigned to receive either XS228 or a placebo (inactive solution) in a 2:1 ratio. Follow-up: Patients will be monitored for 1 year, with regular check-ups to assess safety, nerve function, and recovery progress. What Researchers Are Looking For: Primary Goal: Measure changes in leg and arm function using the ASIA Motor Score at 6 months. Secondary Goals: Improvement in ASIA Impairment Scale (AIS) grade (e.g., from "complete" to "incomplete" paralysis). Recovery of sensation and bladder/bowel control. Safety (monitoring for side effects like infections or immune reactions). Exploratory Tests: MRI scans and biomarker tests in spinal fluid to see if the treatment helps nerve regrowth. Why This Study Matters: If successful, XS228 could become the first stem cell therapy to promote meaningful recovery in spinal cord injury patients. Currently, no treatments exist to repair nerve damage-this trial aims to change that.

_Abstract reproduced under ClinicalTrials.gov (U.S. National Library of Medicine), data processed 2026-10-29T09:00:05; modifications: selected fields only; whitespace normalized; brief summary truncated to 2,000 characters._

## Trial details

- status: NOT_YET_RECRUITING
- phase: PHASE2
- study type: INTERVENTIONAL
- enrollment: 60
- sponsor: XellSmart Bio-Pharmaceutical (Suzhou) Co., Ltd.
- conditions: Spinal Cord Injury; Safety; Efficacy; Clinical Trial; Induced Pluripotent Stem Cells; Human Motor Neuron Progenitor; Transplantation; RCT
- interventions: BIOLOGICAL: Allogeneic Human Induced Pluripotent Stem Cell (iPSC)-Derived Motor Neuron Progenitor Cells; OTHER: Placebo
- start date: 2028-05-25
- start date type: ESTIMATED
- primary completion date: 2031-05-25
- has results: false
- data source: ClinicalTrials.gov
- data processed: 2026-10-29T09:00:05
- modifications: selected fields only; whitespace normalized; brief summary truncated to 2,000 characters

Topics: [Gene & Cell Therapy](https://space-kitty.com/topics/gene-cell-therapy)

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