A Phase 1 Safety and PK Study of IV TP-271

A Phase 1, Randomized, Placebo-Controlled, Double-Blind, Multiple Ascending Dose Study to Assess the Safety, Tolerability, and Pharmacokinetics of Intravenous TP-271 in Healthy Adult Subjects

This is a single-center, randomized, placebo-controlled, double-blind, multiple-ascending-dose, inpatient study to assess the safety, tolerability, and pharmacokinetics of TP-271 in healthy subjects. Subjects aged 18 to 50 years who fulfill the inclusion/exclusion criteria will be enrolled in this study.

Study Overview

• Status: Completed
• Conditions: Bacterial Infections
• Intervention / Treatment: Drug: TP-271; Drug: Placebo

Detailed Description

Up to 5 cohorts of 8 subjects each (up to a total of 40 subjects) will be enrolled. The 8 subjects within each cohort will be randomized 6:2 to receive multiple IV doses of TP-271 or placebo. Study drug will be administered IV once daily on the morning of Days 1 through 7 following an overnight fast (minimum 8 hours). The planned doses for study drug for Cohorts A - E are 0.5 mg/kg TP-271 or placebo, 1.0 mg/kg TP-271 or placebo, 2.0 mg/kg TP-271 or placebo, 2.5 mg/kg TP-271 or placebo and 3.0 mg/kg TP-271 or placebo respectively.

During the Screening period (Days -28 to -2 prior to the subject receiving TP-271 or placebo), each subject will be assessed for eligibility. Each subject must sign and date the ICF prior to undergoing any study-related procedures.

All cohorts will follow the same study design. On Day -1, subjects will be admitted to the study unit and eligibility confirmed. On Day 1, eligible subjects will be enrolled and randomized to receive either TP-271 or placebo and will receive the assigned drug from Days 1 through 7. Subjects will be required to stay at the study unit from Days -1 through 11 to assess safety and obtain the required PK samples. On Day 11, subjects will be discharged from the study unit. A final safety assessment will be performed once between Days 14 and 20, 7 to 13 days following administration of the subject's final dose of study drug.

After all 8 subjects in a cohort have completed study procedures through Day 11, the Principal Investigator and the Sponsor's Medical Monitor will evaluate all blinded safety and plasma PK data to determine whether any criteria that would require a meeting of the Safety Monitoring Committee (SMC) are met. If no such criteria are met, the study may proceed to the subsequent cohort at the next higher dose of TP-271 without consulting the SMC.

• Study Type: Interventional
• Enrollment (Actual): 40
• Phase: Phase 1

Contacts and Locations

Study Locations

• United States
  • Texas
    • Austin, Texas, United States, 78744
      • PPD Phase 1 Clinic

Participation Criteria

Eligibility Criteria

• Ages Eligible for Study: 18 years to 50 years (ADULT)
• Accepts Healthy Volunteers: Yes
• Genders Eligible for Study: All

Description

Inclusion Criteria:

1. Be within the age range of 18 to 50 years, inclusive, at the time of Screening
2. Voluntarily sign an Institutional Review Board (IRB)/Independent Ethics Committee (IEC) approved ICF to participate in the study after all relevant aspects of the study have been explained and discussed with the subject and before undergoing any study-related procedures
3. Have a body mass index (BMI) ≥18.0 and ≤33.0 kg/m2
4. Have a negative history of and negative screening results for human immunodeficiency virus 1 and 2 and hepatitis B and C antibodies
5. Have the ability to communicate with the study unit staff in a manner sufficient to carry out all protocol procedures as described
6. For female subjects, be of non-childbearing potential, either 1 year postmenopausal or surgically sterile (bilateral oophorectomy, bilateral tubal ligation, or complete hysterectomy)
7. For male subjects, be willing and able to use a barrier method of contraception or practice abstinence (including males who had a vasectomy) from dosing through 90 days after administration of the final dose of study drug

Exclusion Criteria:

1. History and/or presence of any clinically significant disease or disorder such as cardiovascular, pulmonary, renal, hepatic, neurological, gastrointestinal, endocrine, psychiatric, or mental disease or disorder, or mental or legal incapacitation, which, in the opinion of the PI or Sub-Investigator(s), may either put the subject at risk because of participation in the study, influence the results of the study, or influence the subject's ability to participate in the study
2. Clinical laboratory values that fall outside the eligibility range specified in Appendix D; for laboratory values that are not included in Appendix D, values outside the reference range are exclusionary, with the following exceptions (Table 4. Acceptable Out-of-Range Clinical Laboratory Values
3. Known allergy to tetracycline antibiotics or to any of the excipients in TP-271

4. Clinically significant abnormality on a 12-lead ECG, including the following:

   • Rhythm other than sinus
   • Corrected QT interval using Fridericia's formula (QTcF) >450 msec
   • Evidence of second- or third-degree atrioventricular block
   • Pathological Q-waves (defined as Q-wave >40 msec or depth >0.4 to 0.5 mV)
   • Evidence of ventricular pre-excitation
   • Evidence of complete left bundle branch block (BBB), right BBB, or incomplete left BBB
   • Intraventricular conduction delay with QRS duration >120 msec
   • ST segment abnormalities, unless judged by the PI or Sub-Investigator(s) to be non pathologic
5. History of seizures
6. History within 3 years of a positive result on a urine screen for drugs of abuse or a positive result at Screening for any of the following drugs of abuse: tetrahydrocannabinols, cocaine, opioids, phencyclidines, amphetamine, benzodiazepine, and barbiturates
7. Use of tobacco, nicotine, or nicotine-replacement products within 3 months prior to administration of the study drug through the last visit
8. Typical weekly alcohol consumption of 7 or more alcoholic drinks, where 1 alcoholic drink is defined as 1 glass of beer (approximately 10 to 12 oz), 1 can (12 oz) of beer, 1 glass of wine (approximately 4 to 5 oz), or distilled spirits (approximately 1 oz or 30 mL of liquor)
9. Alcohol consumption within 48 hours prior to dosing
10. Participation in a clinical study within 10 half-lives of the prior study drug administration or within the previous 3 months if the half-life or dose of the investigational agent is unknown or planned participation in another clinical study concurrent with the current clinical study
11. History of difficulty donating blood or poor venous access
12. Blood donation (1 unit or approximately 350 mL) within 1 month prior to receiving study drug or plans to donate prior to receiving study drug or during the clinical study
13. Use of any prescription or nonprescription medication, including vitamins or herbal medications, vaccination, or immunization within 7 days or 5 half-lives (if known), whichever is longer, prior to dosing of study drug, with the following exceptions: medications used to treat an AE, and the use of acetaminophen, naproxen, and ibuprofen (except for within 24 hours prior to dosing)
14. Male subject donates or plans to donate sperm during the study and for at least 90 days after study drug administration.
15. Unwillingness or inability to follow the procedures outlined in the clinical study protocol

Study Plan

How is the study designed?

Design Details

• Primary Purpose: OTHER
• Allocation: RANDOMIZED
• Interventional Model: SEQUENTIAL
• Masking: QUADRUPLE

Number of Arms

5

Arms and Interventions

Participant Group / Arm	Intervention / Treatment
ACTIVE_COMPARATOR: Cohort A; Multiple IV doses of TP-271, a novel, broad-spectrum tetracycline-class antibiotic, 0.5 mg/kg once daily for 7 days, 60 minute infusion or Placebo - sterile 0.45% saline for 60 minute IV infusion	Drug: TP-271; multiple oral doses of TP-271 or placebo, dosed once daily for 7 days, randomized 3:1, doses escalating as 0.5 mg/kg, 1.0 mg/kg, 2.0 mg/kg, 2.5 mg/kg, and 3.0 mg/kg; Drug: Placebo; Placebo is sterile 0.45% saline randomized 3:1 to receive
ACTIVE_COMPARATOR: Cohort B; Multiple IV doses of TP-271, a novel, broad-spectrum tetracycline-class antibiotic, 1.0 mg/kg once daily for 7 days, 60 minute infusion or Placebo - sterile 0.45% saline for 60 minute IV infusion	Drug: TP-271; multiple oral doses of TP-271 or placebo, dosed once daily for 7 days, randomized 3:1, doses escalating as 0.5 mg/kg, 1.0 mg/kg, 2.0 mg/kg, 2.5 mg/kg, and 3.0 mg/kg; Drug: Placebo; Placebo is sterile 0.45% saline randomized 3:1 to receive
ACTIVE_COMPARATOR: Cohort C; Multiple IV doses of TP-271, a novel, broad-spectrum tetracycline-class antibiotic, 2.0 mg/kg once daily for 7 days, 60 minute infusion or Placebo - sterile 0.45% saline for 60 minute IV infusion	Drug: TP-271; multiple oral doses of TP-271 or placebo, dosed once daily for 7 days, randomized 3:1, doses escalating as 0.5 mg/kg, 1.0 mg/kg, 2.0 mg/kg, 2.5 mg/kg, and 3.0 mg/kg; Drug: Placebo; Placebo is sterile 0.45% saline randomized 3:1 to receive
ACTIVE_COMPARATOR: Cohort D; Multiple IV doses of TP-271, a novel, broad-spectrum tetracycline-class antibiotic, 2.5 mg/kg once daily for 7 days, 60 minute infusion or Placebo - sterile 0.45% saline for 60 minute IV infusion	Drug: TP-271; multiple oral doses of TP-271 or placebo, dosed once daily for 7 days, randomized 3:1, doses escalating as 0.5 mg/kg, 1.0 mg/kg, 2.0 mg/kg, 2.5 mg/kg, and 3.0 mg/kg; Drug: Placebo; Placebo is sterile 0.45% saline randomized 3:1 to receive
ACTIVE_COMPARATOR: Cohort E; Multiple IV doses of TP-271, a novel, broad-spectrum tetracycline-class antibiotic, 3.0 mg/kg once daily for 7 days, 60 minute infusion or Placebo - sterile 0.45% saline for 60 minute IV infusion	Drug: TP-271; multiple oral doses of TP-271 or placebo, dosed once daily for 7 days, randomized 3:1, doses escalating as 0.5 mg/kg, 1.0 mg/kg, 2.0 mg/kg, 2.5 mg/kg, and 3.0 mg/kg; Drug: Placebo; Placebo is sterile 0.45% saline randomized 3:1 to receive

What is the study measuring?

Primary Outcome Measures

Outcome Measure	Measure Description	Time Frame
Adverse Events	Incidence, intensity, and type of adverse events (AEs) from the time of signing the informed consent form (ICF) through the EOS Visit	Throughout the study, ~ 49 days
Physical Exams	Changes in physical examination findings between Day -1 and the EOS Visit	~ 20 days
Vital Signs	Changes in vital signs from Day -1 through the EOS Visit	~ 20 days
Safety Laboratory Results	Changes in safety laboratory (clinical chemistry, electrolytes, hematology, blood glucose, and coagulation) results from Day -1 through the EOS Visit	~ 20 days
ECG measurements	Changes in electrocardiogram (ECG) measurements from Day -1 through the EOS Visit	~ 20 days

Secondary Outcome Measures

Outcome Measure	Measure Description	Time Frame
Assess the Pharmacokinetics (PK) of TP-271in Plasma	Plasma concentrations of TP-271 and its C-4 epimer, TP-9555, for PK analysis from Days 1 through 11	~11 days
Assess the Pharmacokinetics (PK) of TP-271 in Urine	Urine concentrations of TP-271 and its C-4 epimer, TP-9555, from Days 1 through 11	~11 days

Collaborators and Investigators

• Sponsor: Tetraphase Pharmaceuticals, Inc.
• Collaborators: National Institute of Allergy and Infectious Diseases (NIAID)

Study record dates

Study Major Dates

• Study Start (ACTUAL): August 16, 2017
• Primary Completion (ACTUAL): January 2, 2018
• Study Completion (ACTUAL): January 2, 2018

Study Registration Dates

• First Submitted: July 6, 2017
• First Submitted That Met QC Criteria: July 26, 2017
• First Posted (ACTUAL): July 31, 2017

Study Record Updates

• Last Update Posted (ACTUAL): December 13, 2021
• Last Update Submitted That Met QC Criteria: December 9, 2021
• Last Verified: December 1, 2021

More Information

Terms related to this study

• Additional Relevant MeSH Terms: Infections; Bacterial Infections and Mycoses; Bacterial Infections
• Other Study ID Numbers: TP-271-002; HHSN272201100028C (OTHER_GRANT: NIAID)

Plan for Individual participant data (IPD)

• Plan to Share Individual Participant Data (IPD)?: NO

Drug and device information, study documents

• Studies a U.S. FDA-regulated drug product: Yes
• Studies a U.S. FDA-regulated device product: No