COMPLETED

24-Week Study to Assess the PD, Safety, Tolerability, and PK of GLM101 in Participants With PMM2-CDG

Conditions

Pmm2-CDG Phosphomannomutase 2 Deficiency Pmm2 CDG GLM101

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Study Overview

This clinical trial focuses on testing the efficacy of different digital interventions to promote re-engagement in cancer-related long-term follow-up care for adolescent and young adult (AYA) survivors of childhood cancer.

Description

This is a Phase 2, randomized, open-label, 24-week treatment study to evaluate the potential pharmacodynamic (PD) activity, safety, tolerability, and pharmacokinetics (PK) of GLM101 in adult, adolescent, and pediatric, patients with a confirmed diagnosis of PMM2-CDG. The planned doses of GLM101 to be investigated are 10, 20, and 30 mg/kg. The study will consist of a Screening Period, a 24-week (6-month) Treatment Period, and a 30-day (1-month) Follow-Up Period.

Official Title

A Phase 2, Randomized, Open-Label, 24-Week Study to Assess the Pharmacodynamics, Safety, Tolerability, and Pharmacokinetics of Multiple Doses of GLM101 Administered Intravenously to Adult, Adolescent, and Pediatric Participants With PMM2-CDG

Quick Facts

Study Start:2022-11-29

Study Completion:2025-11-18

Study Type:Not specified

Phase:Not Applicable

Enrollment:Not specified

Status:COMPLETED

Study ID

NCT05549219

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Ages Eligible for Study:2 Years to 65 Years

Sexes Eligible for Study:ALL

Accepts Healthy Volunteers:No

Standard Ages:CHILD, ADULT, OLDER_ADULT

Inclusion Criteria	Exclusion Criteria
* Is male or female, 18 to 65 years of age, inclusive, at Screening (Cohorts 1-3, 7), 12-17 years of age, inclusive, at Screening (Cohort 4) or 2-11 years of age, inclusive, at Screening (Cohorts 5 and 6); * Molecularly confirmed diagnosis of PMM2-CDG. Diagnosis is defined as biallelic pathogenic and/or likely pathogenic variants, or, in the case of variants of uncertain pathogenicity, demonstration of bi-allelic variants AND phosphomannomutase-2 (PMM2) enzyme activity consistent with a diagnosis of PMM2-CDG. Historical diagnosis with lab report(s) on file is permitted; * If the participant is a female of childbearing potential (i.e. fertile, following menarche and until becoming post-menopausal unless permanently sterile (permanent sterilization methods include hysterectomy, bilateral salpingectomy and bilateral oophorectomy)) she must not be pregnant (confirmed by a negative serum pregnancy test), is using a medically accepted method of contraception (abstinence, a hormonal contraceptive associated with inhibition of ovulation in conjunction with a barrier method, or use of an intrauterine device), and must agree to continue using this method for 50 days after the last infusion of GLM101; Note: sexual abstinence is considered a highly effective method only if defined as refraining from heterosexual intercourse during the entire period of risk associated with the study treatments. The reliability of sexual abstinence needs to be evaluated in relation to the duration of the clinical trial and the preferred and usual lifestyle of the subject. Periodic abstinence (calendar, symptothermal, post-ovulation methods) is not an acceptable method of contraception; * If the participant is a female of non-childbearing potential, she must be pre-pubertal, surgically sterile, or must have an ovarian dysfunction confirmed by a follicle stimulating hormone (FSH) \>40 IU/L and absence of menses for 12 months without an alternative medical cause; * If the participant is a sexually active male with female partners, the sexually mature, nonsterile male participant agrees to use a medically acceptable method of contraception (abstinence, the partner taking a hormonal contraceptive in conjunction with a male condom, or use by the partner of an intrauterine device with a male condom) and agrees to continue using this method for 50 days after the last infusion of GLM101. Males are considered surgically sterile if they have undergone bilateral orchiectomy or vasectomy at least 3 months prior to Screening; * If the participant is male, he must agree to refrain from donating sperm during the study and 50 days after the last infusion of GLM101; * Is willing and able to provide informed consent/assent, directly or through his/her legally authorized representative.	* Diagnosis of congenital disorder of glycosylation (CDG) other than PMM2; Diagnosis is defined as biallelic pathogenic and/or likely pathogenic variants, or, in the case of variants of uncertain pathogenicity, demonstration of bi-allelic variants AND the defined CDG enzyme activity consistent with a diagnosis of the CDG other than PMM2 CDG. * Has an active infection requiring parenteral antibiotics, antivirals, or antifungals or treatment with systemic steroids within 7 days prior to Screening; * Has confirmed active coronavirus disease-2019 (COVID-19) or tests positive for severe acute respiratory syndrome coronavirus 2 (SARS CoV 2) at Screening or check in to the clinical site; * ALT or AST \>3× ULN OR total bilirubin \>2× ULN or INR \>1.5 * Has a history of a severe allergic reaction to any drug or excipients of GLM101 (as listed in the GLM101 Investigator's Brochure); * Has a known history of poor venous access; * Has a history of liver transplant; * Has a history of drug or alcohol use disorder within 12 months prior to Screening; * Has had a major surgical procedure within 30 days prior to Screening; * Has Screening or eligibility confirmation laboratory value(s) outside the laboratory reference range considered clinically significant and not related to PMM2-CDG; * If female, has a positive serum pregnancy test during Screening; * If female, must not be breastfeeding; * Has serology positive for hepatitis B surface antigen or hepatitis C antibody during Screening; * Has history or presence, upon clinical evaluation, of any illness that might impact the safety of GLM101 infusion or evaluability of drug effect based on the Investigator's and Medical Monitor's discretion; * Has a QTc ≥ 450 ms, or other clinically significant ECG abnormalities; * Has uncontrolled cardiovascular, hepatic, pulmonary, gastro-intestinal, endocrine, metabolic, ophthalmologic, immunologic, psychiatric or other significant disease; * Is currently participating in another interventional clinical study or has completed another clinical study with an investigational drug or device within 30 days or 5 half-lives before GLM101 infusion. * Weight exceeds 75 kg.

Inclusion Criteria

Exclusion Criteria

* Is male or female, 18 to 65 years of age, inclusive, at Screening (Cohorts 1-3, 7), 12-17 years of age, inclusive, at Screening (Cohort 4) or 2-11 years of age, inclusive, at Screening (Cohorts 5 and 6);
* Molecularly confirmed diagnosis of PMM2-CDG. Diagnosis is defined as biallelic pathogenic and/or likely pathogenic variants, or, in the case of variants of uncertain pathogenicity, demonstration of bi-allelic variants AND phosphomannomutase-2 (PMM2) enzyme activity consistent with a diagnosis of PMM2-CDG. Historical diagnosis with lab report(s) on file is permitted;
* If the participant is a female of childbearing potential (i.e. fertile, following menarche and until becoming post-menopausal unless permanently sterile (permanent sterilization methods include hysterectomy, bilateral salpingectomy and bilateral oophorectomy)) she must not be pregnant (confirmed by a negative serum pregnancy test), is using a medically accepted method of contraception (abstinence, a hormonal contraceptive associated with inhibition of ovulation in conjunction with a barrier method, or use of an intrauterine device), and must agree to continue using this method for 50 days after the last infusion of GLM101; Note: sexual abstinence is considered a highly effective method only if defined as refraining from heterosexual intercourse during the entire period of risk associated with the study treatments. The reliability of sexual abstinence needs to be evaluated in relation to the duration of the clinical trial and the preferred and usual lifestyle of the subject. Periodic abstinence (calendar, symptothermal, post-ovulation methods) is not an acceptable method of contraception;
* If the participant is a female of non-childbearing potential, she must be pre-pubertal, surgically sterile, or must have an ovarian dysfunction confirmed by a follicle stimulating hormone (FSH) \>40 IU/L and absence of menses for 12 months without an alternative medical cause;
* If the participant is a sexually active male with female partners, the sexually mature, nonsterile male participant agrees to use a medically acceptable method of contraception (abstinence, the partner taking a hormonal contraceptive in conjunction with a male condom, or use by the partner of an intrauterine device with a male condom) and agrees to continue using this method for 50 days after the last infusion of GLM101. Males are considered surgically sterile if they have undergone bilateral orchiectomy or vasectomy at least 3 months prior to Screening;
* If the participant is male, he must agree to refrain from donating sperm during the study and 50 days after the last infusion of GLM101;
* Is willing and able to provide informed consent/assent, directly or through his/her legally authorized representative.

* Diagnosis of congenital disorder of glycosylation (CDG) other than PMM2; Diagnosis is defined as biallelic pathogenic and/or likely pathogenic variants, or, in the case of variants of uncertain pathogenicity, demonstration of bi-allelic variants AND the defined CDG enzyme activity consistent with a diagnosis of the CDG other than PMM2 CDG.
* Has an active infection requiring parenteral antibiotics, antivirals, or antifungals or treatment with systemic steroids within 7 days prior to Screening;
* Has confirmed active coronavirus disease-2019 (COVID-19) or tests positive for severe acute respiratory syndrome coronavirus 2 (SARS CoV 2) at Screening or check in to the clinical site;
* ALT or AST \>3× ULN OR total bilirubin \>2× ULN or INR \>1.5
* Has a history of a severe allergic reaction to any drug or excipients of GLM101 (as listed in the GLM101 Investigator's Brochure);
* Has a known history of poor venous access;
* Has a history of liver transplant;
* Has a history of drug or alcohol use disorder within 12 months prior to Screening;
* Has had a major surgical procedure within 30 days prior to Screening;
* Has Screening or eligibility confirmation laboratory value(s) outside the laboratory reference range considered clinically significant and not related to PMM2-CDG;
* If female, has a positive serum pregnancy test during Screening;
* If female, must not be breastfeeding;
* Has serology positive for hepatitis B surface antigen or hepatitis C antibody during Screening;
* Has history or presence, upon clinical evaluation, of any illness that might impact the safety of GLM101 infusion or evaluability of drug effect based on the Investigator's and Medical Monitor's discretion;
* Has a QTc ≥ 450 ms, or other clinically significant ECG abnormalities;
* Has uncontrolled cardiovascular, hepatic, pulmonary, gastro-intestinal, endocrine, metabolic, ophthalmologic, immunologic, psychiatric or other significant disease;
* Is currently participating in another interventional clinical study or has completed another clinical study with an investigational drug or device within 30 days or 5 half-lives before GLM101 infusion.
* Weight exceeds 75 kg.

Contacts and Locations

Study Locations (Sites)

Clinical Research of West Florida

Tampa, Florida, 33606

United States

Mayo Clinic

Rochester, Minnesota, 55905

United States

Collaborators and Investigators

Sponsor: Glycomine, Inc.

Study Record Dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Registration Dates

Study Start Date2022-11-29

Study Completion Date2025-11-18

Study Record Updates

Study Start Date2022-11-29

Study Completion Date2025-11-18

Terms related to this study

Keywords Provided by Researchers

Pmm2-CDG
Pmm2
CDG
GLM101

Additional Relevant MeSH Terms

Pmm2-CDG
Phosphomannomutase 2 Deficiency