1. Subject: 10 patients

   : Chronic low back pain patients with lumbar intervertebral disc degeneration

2. Investigational Product

   : Autologous adipose derived mesenchymal stem cells plus hyaluronic acid derivatives (Tissuefill)

3. Time frame

   • 1 year

1. Purpose of the Clinical Study

   : To transplant autologous adipose derived mesenchymal stem cells with hyaluronic acid to patients with chronic low back pain caused by a degenerative lumbar disc to examine the procedure's safety and efficacy.

2. Phases and Design of the Clinical Study

   : This clinical study is a I/IIa phase single-group, open, investigator initiated trial.

3. Investigational Product : Autologous adipose derived mesenchymal stem cells separated from the subject (2 x 10^7 cells/mL /vial or 4 x 10^7 cells/mL /vial).

The investigational product mixed with 1 mL of the concomitant drug Tissuefill (hyaluronic acid derivatives, Cha Meditech Co., Ltd.).

4. Inclusion Criteria

1. Males and female subjects aged 18 or over and less than 70.
2. Subjects who have experienced pain in the lower back or buttocks who have failed to respond to conservative therapies performed for a period of 3 months or longer.
3. Oswestry Disability Index of 30 % or higher.
4. Visual Analogue Scale of 4 or higher.
5. Subjects who have received a Magnetic Resonance Imaging (hereinafter referred to as MRI) assessment of grades 3 to 4 for Lumbar 1 - Sacral 1, according to the Pfirrmann grading system.
6. Subjects who are assessed to have a similar degree of pain as usual when a discogram is performed on the degenerative lumbar disc(s) identified by MRI, having one or two discs that cause the concordant pain.
7. Subjects who have signed the informed consent form for stem cell transplantation therapy.

5. Exclusion Criteria

1. Subjects with severe lumbar stenosis or herniated nucleus pulposus in the lumbar exhibiting symptoms of nerve compression and requiring surgery.
2. Subjects with spinal instability, spondylitis, or vertebral fractures
3. Patients with severe intervertebral disc degeneration that has resulted in a reduction of the disc height by ½ or more.
4. Subjects with severe osteoporosis (with an average T-score of -2.5 or below in the lumbar bone density test)
5. Patients who have received intra-discal procedures such as stem cell therapy or the injection of steroids into the disc or surgery such as discectomy on the disc on which the cell transplantation is planned to be performed.
6. Patients who have received a lumbar epidural steroid injection within a week prior to the cells transplantation.
7. Subjects who are hypersensitive to sodium hyaluronate.
8. Pregnant or breastfeeding women
9. Female patients with the possibility of pregnancy during the period of the clinical study who are not using a medically acceptable method of contraception.
10. Subjects with mental illness or a drug or alcohol addiction or subjects who are incapable of understanding the purpose and method of this clinical study.
11. Subjects who have participated in another clinical study in the 30 days prior to this study.
12. Subjects with a severe medical disease (hypertension unresponsive to drug treatment, diabetes unresponsive to drug treatment, hepatocirrhosis, renal failure, tumor) that can affect the outcome of this clinical study.
13. Subjects with any other clinically significant findings that renders the subject unsuitable for the clinical study, as judged by the investigator responsible for the clinical study.

6. Dosage and Administration

: The autologous adipose derived mesenchymal stem cell as the investigational product (2 x 10^7 cells/mL /vial or 4 x 10^7 cells/mL /vial) and Tissuefill 1mL/syringe are supplied to the operating room. The investigational product and the Tissuefill (hyaluronic acid derivatives) are mixed and placed in a 22 G syringe. A single dosage of 2ⅹ10^7 autologous adipose derived mesenchymal stem cells per person is administered on 5 subjects, and a single dosage of 4ⅹ10^7 cells per person is administered on 5 subjects, injected into the center of the nucleus pulposus.

7. Primary Endpoint: Evaluation of Safety and Tolerability The transplantation will be considered to be safe and tolerable, in the absence of the following types of counterevidence.

- Adverse events of grade 3 (NCI grading system) or above related to the cell products/ any evidence that the cells were contaminated by pollutants / any evidence that the cells exhibit tumorigenic potential

8. Secondary Endpoint

1. Change in the T2 MRI signal intensity of the nucleus pulposus in autologous adipose derived mesenchymal stem cells at 6 and 12 months after the transplantation compared to before the transplantation
2. Change in the VAS at 1, 3, 6, 9, and 12 months after the transplantation of autologous adipose derived mesenchymal stem cells, compared to before the transplantation
3. Change in the ODI at 1, 3, 6, 9, and 12 months after the transplantation of autologous adipose derived mesenchymal stem cells, compared to before the transplantation
4. Change in the Short Form (SF)-36 at 1, 3, 6, 9, and 12 months after the transplantation of autologous adipose derived mesenchymal stem cells, compared to before the transplantation
5. Assessment of the overall improvement in the Disc Height Index (hereinafter referred to as DHI) at 6 and 12 months after the transplantation of autologous adipose derived mesenchymal stem cells, compared to before the transplantation

Inclusion Criteria:

1. Subjects who have experienced pain in the lower back or buttocks who have failed to respond to conservative therapies performed for a period of 3 months or longer.
2. Oswestry Disability Index of 30% or higher.
3. Visual Analogue Scale of 4 or higher.
4. Subjects who have received a Magnetic Resonance Imaging (hereinafter referred to as MRI) assessment of grades 3 to 4 for Lumbar 1 - Sacral 1, according to the Pfirrmann grading system.
5. Subjects who are assessed to have a similar degree of pain as usual when a discogram is performed on the degenerative lumbar disc(s) identified by MRI, having one or two discs that cause the pain.
6. Subjects who have signed the informed consent form for stem cell transplantation therapy.

Exclusion Criteria:

1. Subjects with severe lumbar stenosis or herniated nucleus pulposus in the lumbar exhibiting symptoms of nerve compression and requiring surgery.

2. Subjects with spinal instability, spondylitis, or vertebral fractures

3. Patients with severe intervertebral disc degeneration that has resulted in a reduction of the disc height by ½ or more.

4. Subjects with severe osteoporosis (with an average T-score of -2.5 or below in the lumbar bone density test)

5. Patients who have received intra-discal procedures such as stem cell therapy or the injection of steroids into the disc or surgery such as discectomy on the disc on which the cell transplantation is planned to be performed.

6. Patients who have received a lumbar epidural steroid injection within a week prior to the cells transplantation.

7. Subjects who are hypersensitive to sodium hyaluronate.

8. Pregnant or breastfeeding women

9. Female patients with the possibility of pregnancy during the period of the clinical study who are not using a medically acceptable method of contraception.

   * Medically acceptable methods of contraception: condoms, an oral contraceptive administered continually for at least 3 months, an implantable contraceptive surgically inserted 3 months prior to the clinical study, injected or inserted contraceptives, an intrauterine contraceptive device, etc.

10. Subjects with mental illness or a drug or alcohol addiction or subjects who are incapable of understanding the purpose and method of this clinical study.

11. Subjects who have participated in another clinical study in the 30 days prior to this study.

12. Subjects with a severe medical disease (hypertension unresponsive to drug treatment, diabetes unresponsive to drug treatment, hepatocirrhosis, renal failure, tumor) that can affect the outcome of this clinical study.

13. Subjects with any other clinically significant findings that renders the subject unsuitable for the clinical study, as judged by the investigator responsible for the clinical study.