Assess Safety and Compare PK of New Oral hPTH(1-34) Tablet Formulations vs. EBP05 Tablets and Subcutaneous Forteo

A Phase 1b, Open-label, Partially Randomised Study to Assess Safety and Compare Pharmacokinetics of New Oral hPTH(1-34) Tablet Formulations vs. Oral EBP05 Tablets and Subcutaneous Forteo® Injection in Healthy Male Subjects

The purpose of this study is to characterize and compare the pharmacokinetics of hPTH(1 34) after treatment with modified oral formulations (EBP11, EBP11-F1, EBP11-F2, EBP11-F4, EBP11-F5 and EBP22) versus three dose levels of Entera Bio's extensively studied oral EBP05 1.5 mg, 2.5 mg and 3.0 mg as well as the commercial Forteo 0.02 mg subcutaneous injection.

Study Overview

• Status: Completed
• Conditions: Fractures, Bone; Osteoporosis; Hypoparathyroidism; Other Disease
• Intervention / Treatment: Drug: EBP05; Drug: EBP11; Drug: EBP22; Drug: Forteo 0.02 mg; Drug: EBP11-F2; Drug: EBP11-F4; Drug: EBP11-F5; Drug: EBP11-F1

Detailed Description

Stated in summary, eligibility criteria and outcome measures

• Study Type: Interventional
• Enrollment (Actual): 45
• Phase: Phase 1

Contacts and Locations

Study Locations

• Israel
  • Jerusalem, Israel, 91120,
    • Clinical Research Center Hadassah Ein Kerem Medical Center

Participation Criteria

Eligibility Criteria

• Ages Eligible for Study: Adult
• Accepts Healthy Volunteers: Yes

Description

Inclusion Criteria:

1. Healthy male subjects, 18 - 35 years of age, inclusive, at screening.
2. Continuous nonsmoker who has not used nicotine containing products (including e-cigarettes, vapors, etc.) for at least 12 months prior to first dosing and throughout the study, based on subject self-reporting.
3. Body mass index (BMI) ≥ 18.0 and ≤ 32.0 kg/m2 at screening.
4. Medically healthy with no clinically significant medical condition, physical examination, laboratory profiles, vital signs, orthostatic vital sign measurements, or ECGs, as deemed by the PI or designee to be relevant to the study and does not pose an additional risk to the subject by their participation in the study.
5. Understands the study procedures described in the Informed Consent Form (ICF), be willing and able to comply with the protocol, and provides written consent.

Exclusion Criteria:

1. History or current condition of mental instability or cognitive impairment that, in the opinion of the investigator, could compromise the validity of informed consent, compromise the safety of the participant, or lead to nonadherence with the study protocol or inability to conduct the study procedures.
2. Active gastrointestinal inflammatory disorder, gastrointestinal motility disorders, and chronic gastritis, including but not limited to: ulcerative colitis, Crohn's disease, irritable bowel syndrome, short bowel syndrome, celiac disease, gastroparesis, that may affect drug bioavailability.
3. Any conditions or factors that, in the judgment of the PI or designee, somehow may impact gastrointestinal absorption, distribution or metabolism of parathyroid hormone analogues, or known to potentiate or predispose to undesired effects.
4. History of significant gastrointestinal, liver or kidney disease, or gastrointestinal surgery (including bariatric surgery, or any other interventional procedures with stomach and intestinal tract) that may affect either drug bioavailability, or hPTH(1-34) or SNAC metabolism.
5. History or presence of alcohol or drug abuse or positive urine drug or blood alcohol results at screening.
6. Known allergies or sensitivities to components of the Study Medication (e.g. soy) or known hypersensitivity to PTH or hPTH(1-34).

7. History or presence of clinically significant:

   • Urolithiasis;
   • Angina at Screening, in the opinion of the PI;
   • Hypocalcemia or hypercalcemia at screening;
   • Personal or family history of congenital long QT syndrome or known family history of sudden death.

8. Subjects with ECG findings deemed abnormal with clinical significance by the PI or designee at screening for the following:

   • QTcF interval > 470 msec;
   • PR > 220 msec;
   • QRS > 120 msec.
9. Positive results at screening for human immunodeficiency virus (HIV), hepatitis B surface antigen (HBsAg) or hepatitis C virus (HCV).
10. Seated blood pressure is less than 90 systolic or 40 diastolic mmHg or greater than 140 systolic or 90 diastolic mmHg at screening;
11. Orthostatic vital sign results with a decrease in systolic > 20 mmHg or decrease in diastolic > 10 mm Hg, and/or increase in heart rate of > 20 beats per minute at screening or Day 1 check-in.
12. Seated heart rate is lower than 50 bpm or higher than 99 bpm at screening (when clinically significant as determined by PI).
13. Estimated creatinine clearance < 80 mL/min at screening

14. Unable to refrain from or anticipates the use of:

    • Any drug, including prescription and nonprescription medications, herbal remedies, or vitamin supplements that should be taken on the treatment visit day before the dosing of Study Medication and 2 hours after the dosing of Study Medication.
    • H2 blocker or PPI or antacid (including prescription and nonprescription) three days before the dosing of the Study Medication and 2 hours after the dosing of Study Medication.
15. Donation of blood or significant blood loss within 56 days prior to first dosing.
16. Hemoglobin levels below 13 g/dL at screening or at in screening test done during the study.
17. Plasma donation within 7 days prior to first dosing.
18. Participation in another interventional clinical study within 30 days prior to screening visit.

Study Plan

How is the study designed?

Design Details

• Primary Purpose: Treatment
• Allocation: Randomized
• Interventional Model: Crossover Assignment
• Masking: None (Open Label)

Number of Arms

19

Arms and Interventions

Participant Group / Arm	Intervention / Treatment
Experimental: Treatment A EBP05 2.5 mg; Single dose of oral EBP05 2.5 mg	Drug: EBP05; Oral tablets; Other Names: hPTH(1-34)
Experimental: Treatment B EBP05 1.5 mg; Single dose of oral EBP05 1.5 mg	Drug: EBP05; Oral tablets; Other Names: hPTH(1-34)
Experimental: Treatment D EBP11 1.5 mg; Single dose of oral EBP11 1.5 mg	Drug: EBP11; Oral tablets; Other Names: hPTH(1-34)
Experimental: Treatment G EBP11 1.5 mg; Single dose of oral EBP11 1.5 mg	Drug: EBP11; Oral tablets; Other Names: hPTH(1-34)
Experimental: Treatment I EBP22 1.5 mg; Single dose of oral EBP22 1.5 mg	Drug: EBP22; Oral tablets; Other Names: hPTH(1-34)
Experimental: Treatment J EBP22 1.5 mg; Single dose of oral EBP22 1.5 mg	Drug: EBP22; Oral tablets; Other Names: hPTH(1-34)
Experimental: Treatment F EBP11 BID (dose determined after IA); BID administration of oral EBP11 tablets 1.5 mg tablets (3 x 0.5 mg tablets) as first dose and 2.5 mg (5 x 0.5 mg tablets) as second dose.	Drug: EBP11; Oral tablets; Other Names: hPTH(1-34)
Experimental: Treatment C Forteo 0.02 mg; Single SC injection of Forteo 0.02 mg	Drug: Forteo 0.02 mg; Subcutaneous injection; Other Names: hPTH(1-34)
Experimental: Treatment E EBP11 BID (dose determined after IA); BID administration of oral EBP11 2.5 mg tablets	Drug: EBP11; Oral tablets; Other Names: hPTH(1-34)
Experimental: Treatment K EBP05 1.5 mg; Single dose of oral EBP05 1.5 mg	Drug: EBP05; Oral tablets; Other Names: hPTH(1-34)
Experimental: Treatment L EBP05 2.5 mg; Single dose of oral EBP05 2.5 mg	Drug: EBP05; Oral tablets; Other Names: hPTH(1-34)
Experimental: Treatment M Forteo 0.02 mg; Single SC injection of Forteo 0.02 mg	Drug: Forteo 0.02 mg; Subcutaneous injection; Other Names: hPTH(1-34)
Experimental: Treatment N EBP05 3.0 mg; Single dose of oral EBP05 3.0 mg	Drug: EBP05; Oral tablets; Other Names: hPTH(1-34)
Experimental: Treatment P EBP11-F2 1.5 mg; Single dose of oral EBP11-F2 1.5 mg	Drug: EBP11-F2; Oral tablets; Other Names: hPTH(1-34)
Experimental: Treatment Q EBP11-F4 2.5 mg; Single dose of oral EBP11-F4 2.5 mg	Drug: EBP11-F4; Oral tablets; Other Names: hPTH(1-34)
Experimental: Treatment H EBP22 2.5 mg (5 x 0.5 mg tablets); Single dose of oral EBP22 2.5 mg (5 x 0.5 mg tablets)	Drug: EBP22; Oral tablets; Other Names: hPTH(1-34)
Experimental: Treatment O EBP11-F4 2.5 mg; Single dose of oral EBP11-F4 2.5 mg	Drug: EBP11-F4; Oral tablets; Other Names: hPTH(1-34)
Experimental: Treatment R EBP11-F5 3.0 mg; Single dose of oral EBP11-F5 3.0 mg	Drug: EBP11-F5; Oral tablets; Other Names: hPTH(1-34)
Experimental: Treatment S EBP11-F1 1.0 mg; Single dose of oral EBP11-F1 1.0 mg	Drug: EBP11-F1; Oral tablets; Other Names: hPTH(1-34)

What is the study measuring?

Primary Outcome Measures

Outcome Measure	Measure Description	Time Frame
Assessment of the pharmacokinetic profile of plasma hPTH(1-34) after single or twice daily oral administration for treatment regimen as listed under Arms and Interventions at 5, 10, 15, 20, 40, 50, 60, 75, 90, 105, 120, 180, 240, 360 min. post dose	Pharmacokinetic parameter - plasma hPTH(1-34) in pg/mL	6 hours
Calculation of plasma levels of hPTH(1-34) AUC0-t for each treatment regimen	Pharmacokinetic parameter - total drug exposure at different time points up to 360 min. post dose	6 hours
Calculation of plasma levels of hPTH(1-34) AUC0-inf for each treatment regimen	Pharmacokinetic parameter - total drug exposure in pg/mL over time from 0 extrapolated to infinity	6-14 hours
Calculation of plasma levels of hPTH(1-34) AUC%extrap for each treatment regimen	Pharmacokinetic parameter - Percent of AUC0-inf extrapolated to confirm reliability	6-14 hours
Calculation of plasma levels of hPTH(1-34) Cmax for each treatment regimen	Pharmacokinetic parameter - hPTH (1-34) maximal concentration in pg/mL (Cmax)	6-14 hours
Calculation of plasma levels of hPTH(1-34) Tmax for each treatment regimen	Pharmacokinetic parameter - time in minutes to reach max. concentration of hPTH(1-34)	6-14 hours
Calculation of plasma levels of hPTH(1-34) Kel for each treatment regimen	Pharmacokinetic parameter - elimination rate constant in pg/mL, fraction of drug eliminated per time-point up to 360 min. post dose	6 hours
Calculation of plasma levels of hPTH(1-34) t½ for each treatment regimen	Pharmacokinetic parameter - terminal elimination half life of hPTH(1-34) in minutes	6-14 hours
Calculation of plasma levels of hPTH(1-34) Tlast for each treatment regimen	Pharmacokinetic parameter - time of the last measurable concentration of hPTH(1-34) in minutes	6-14 hours
Assessment of inter-subject variability of hPTH(1-34) for each treatment regimen	Pharmacokinetic parameter - Coefficient of Variance (CV%) of hPTH (1-34)	6-14 hours
Calculation of dose proportionality for hPTH(1-34) for relevant treatment regimen	Pharmacokinetic parameter	6 hours
Assessment of the duration of exposure to hPTH(1-34) in minutes	Pharmacokinetic parameter - up to 360 min. post dose	6 hours
Vital Signs - body temperature (Celsius)	Safety parameter (group mean at each time point up to 360 min. post dose)	6 hours
Vital Signs - respiratory rate (breaths per minute)	Safety parameter (group mean at each time point up to 360 min. post dose)	6 hours
Vital Signs - blood pressure (systolic/diastolic mmHg)	Safety parameter (group mean at each time point up to 360 min. post dose)	6 hours
Vital Signs - heart rate (beats per minute)	Safety parameter (group mean at each time point up to 360 min. post dose)	6 hours
Incidence of Treatment-Emergent Adverse Events as assessed by the Principle Investigator	Safety parameter - AEs observed over duration of study participation	6-14 hours
Incidence of Serious Adverse Events (SAEs) as assessed by the Principle Investigator	Safety parameter - SAEs observed over duration of study participation	6-14 hours

Other Outcome Measures

Outcome Measure	Measure Description	Time Frame
Measurement of plasma soybean trypsin inhibitor, Kunitz type (SBTI) levels (EBP05 only)	Pharmacokinetic parameter in ng/mL	6 hours
Measurement of plasma salcaprozate sodium (SNAC) levels (EBP05 only)	Pharmacokinetic parameter in μg/mL	6 hours
Measurement of serum calcium (albumin-corrected total calcium) for all treatment regimen	Pharmacodynamic parameter in mg/dL at 120, 240, 360 min post dose	6 hours
Measurement of serum phosphate for all treatment regimen	Pharmacodynamic parameter in mg/dL at 120, 240, 360 min post dose	6 hours
Measurement of serum intact hPTH(1-84) for all treatment regimen	Pharmacodynamic parameter in pg/mL at 120, 240, 360 min post dose	6 hours
Measurement of serum 1,25-(OH)2D for all treatment regimen (optional)	Pharmacodynamic parameter in ng/mL at 120, 240, 360 min post dose	6 hours
Assessment of food effect on EBP05 PK profile	Pharmacokinetic parameter measured in pg/mL	60 minutes
Assessment of food effect on EBP11 PK profile	Pharmacokinetic parameter measured in pg/mL	60 minutes

Collaborators and Investigators

• Sponsor: Entera Bio Ltd.
• Investigators: Principal Investigator: Yosef Caraco, MD, Clinical Research Center Hadassah Ein Kerem Medical Center

Study record dates

Study Major Dates

• Study Start (Actual): May 11, 2023
• Primary Completion (Actual): February 8, 2026
• Study Completion (Actual): February 8, 2026

Study Registration Dates

• First Submitted: June 8, 2023
• First Submitted That Met QC Criteria: July 27, 2023
• First Posted (Actual): July 28, 2023

Study Record Updates

• Last Update Posted (Actual): February 17, 2026
• Last Update Submitted That Met QC Criteria: February 12, 2026
• Last Verified: November 1, 2025

More Information

Terms related to this study

• Keywords: Osteoporosis; Teriparatide; Hypoparathyroidism; Parathyroid Hormone; PTH(1-34)
• Additional Relevant MeSH Terms: Endocrine System Diseases; Bone Diseases; Musculoskeletal Diseases; Wounds and Injuries; Pathologic Processes; Metabolic Diseases; Bone Diseases, Metabolic; Parathyroid Diseases; Pathological Conditions, Signs and Symptoms; Nutritional and Metabolic Diseases; Fractures, Bone; Disease; Osteoporosis; Hypoparathyroidism; Hormones; Hormones, Hormone Substitutes, and Hormone Antagonists; Peptide Hormones; Peptides; Amino Acids, Peptides, and Proteins; Parathyroid Hormone; Teriparatide
• Other Study ID Numbers: ENT-11-2023

Drug and device information, study documents

• Studies a U.S. FDA-regulated drug product: No
• Studies a U.S. FDA-regulated device product: No
• product manufactured in and exported from the U.S.: No