<clinical_study>
  <!-- This xml conforms to an XML Schema at:
    https://clinicaltrials.gov/ct2/html/images/info/public.xsd -->
  <required_header>
    <download_date>ClinicalTrials.gov processed this data on September 20, 2023</download_date>
    <link_text>Link to the current ClinicalTrials.gov record.</link_text>
    <url>https://clinicaltrials.gov/ct2/show/NCT03275740</url>
  </required_header>
  <id_info>
    <org_study_id>B7801001</org_study_id>
    <secondary_id>2018-003315-21</secondary_id>
    <nct_id>NCT03275740</nct_id>
  </id_info>
  <brief_title>A First in HumanTrial to Evaluate The Safety, Tolerability, And Pharmacokinetics Of PF-06755347</brief_title>
  <official_title>A PHASE 1, RANDOMIZED, DOUBLE-BLIND, SPONSOR-OPEN, PLACEBO -CONTROLLED, FIRST-IN-HUMAN TRIAL TO EVALUATE THE SAFETY, TOLERABILITY, AND PHARMACOKINETICS OF PF 06755347 AFTER SINGLE ASCENDING INTRAVENOUS AND SUBCUTANEOUS DOSING IN HEALTHY ADULT MALE PARTICIPANTS AND OPEN-LABEL AFTER SINGLE SUBCUTANEOUS DOSING IN MALE AND FEMALE PARTICIPANTS WITH PERSISTENT OR CHRONIC PRIMARY IMMUNE THROMBOCYTOPENIA</official_title>
  <sponsors>
    <lead_sponsor>
      <agency>Pfizer</agency>
      <agency_class>Industry</agency_class>
    </lead_sponsor>
  </sponsors>
  <source>Pfizer</source>
  <oversight_info>
    <has_dmc>No</has_dmc>
    <is_fda_regulated_drug>Yes</is_fda_regulated_drug>
    <is_fda_regulated_device>No</is_fda_regulated_device>
  </oversight_info>
  <brief_summary>
    <textblock>
      This phase 1 single ascending dose study will provide a first in human assessment of safety&#xD;
      and tolerability of PF-06755347 in healthy adult males as well as adult males and females&#xD;
      with Immune Thrombocytopenia (ITP). Pharmacokinetics and pharmacodynamics will also be&#xD;
      evaluated.&#xD;
    </textblock>
  </brief_summary>
  <overall_status>Terminated</overall_status>
  <why_stopped>
    The Sponsor has decided to terminate the above referenced clinical study for business reasons.&#xD;
    There were no safety concerns that led to this decision and there was no impact to participant&#xD;
    safety.&#xD;
  </why_stopped>
  <start_date type="Actual">July 17, 2017</start_date>
  <completion_date type="Actual">January 6, 2023</completion_date>
  <primary_completion_date type="Actual">January 6, 2023</primary_completion_date>
  <phase>Phase 1</phase>
  <study_type>Interventional</study_type>
  <has_expanded_access>No</has_expanded_access>
  <study_design_info>
    <allocation>Randomized</allocation>
    <intervention_model>Sequential Assignment</intervention_model>
    <intervention_model_description>single ascending dose study</intervention_model_description>
    <primary_purpose>Treatment</primary_purpose>
    <masking>Double (Participant, Investigator)</masking>
    <masking_description>Double blind (investigator and subject), sponsor open in healthy male participants. Masking will not be applied for participants with ITP (all ITP participants will receive PF-06755347).</masking_description>
  </study_design_info>
  <primary_outcome>
    <measure>Number of Participants With Treatment Emergent Treatment-Related Adverse Events (AEs)</measure>
    <time_frame>Baseline (study day -2) through study completion (study day 36 for intravenous dose cohorts 1 - 6, and study day 71 for subcutaneous dose cohorts.</time_frame>
  </primary_outcome>
  <primary_outcome>
    <measure>Number of Participants With Clinical Laboratory Abnormalities</measure>
    <time_frame>Baseline, study days 1, 2, 4, 6, 8, 11, 15, 22, 29 and 36 for i.v. dose cohorts 1 - 6, and Baseline, study days 1, 2, 3, 4, 6, 8, 11, 15, 22, 29, 36, 50 and day 71 for subcutaneous dose cohorts.</time_frame>
    <description>Safety laboratory includes Hematology, Chemistry, Urinalysis, prothrombin time/international normalized ratio, partial thromboplastin time, D dimer, and fibrinogen</description>
  </primary_outcome>
  <primary_outcome>
    <measure>Number of Participants With Categorical Vital Signs Data</measure>
    <time_frame>Baseline, study days 1, 2, 3, 4, 6, 8, 11, 15, 22, 29, and day 36 for i.v. dose cohorts 1 - 6 and Baseline, study days 1, 2, 3, 4, 6, 8, 11, 15, 22, 29, 36, 50 and day 71 for subcutaneous dose cohorts.</time_frame>
    <description>Vital signs include blood pressure, pulse rate, and body temperature. Number of participants with maximum increase from Baseline in sitting SBP and DBP of greater than or equal to 30 mmHg will be reported</description>
  </primary_outcome>
  <primary_outcome>
    <measure>Number of Participants With Abnormal Electrocardiogram (ECG)</measure>
    <time_frame>Baseline (study day 1, pre-dose), study days 1 (post dose), 2, 4, 6, 8, 11, 22, 36 (end of study visit for intravenous dose cohorts 1 - 6, and end of study visit day 71) for subcutaneous dose cohorts.</time_frame>
    <description>Criteria for ECG abnormalities: maximum PR interval &gt;=300 milliseconds (msec) and maximum increase PR interval increase from baseline (IFB): percent change (Pctchg) &gt;=25 percent (%) for baseline value of &gt;200 msec and Pctchg&gt;=50% for baseline value of &lt;=200 msec for PR interval, maximum QRS interval &gt;=140 msec and a maximum IFB: Pctchg&gt;=50%, maximum QTCF interval (Fridericia's Correction) of 450 msec to &lt;480 msec, 480 msec to &lt;500 msec or &gt;=500 msec and a maximum change of &lt;=30change&lt;60 or &gt;=60 msec from baseline.</description>
  </primary_outcome>
  <secondary_outcome>
    <measure>Maximum Observed Plasma Concentration (Cmax)</measure>
    <time_frame>Hours 0, 12, 24, 48, 72, 120, 168 for all cohorts. Hours 1, 3, 5, &amp; 8 for all i.v. cohorts. Hour 36 for i.v. cohorts 1-2. Days 15, 22, 29, and 36 for subcutaneous and i.v. cohorts 5 exp &amp; 6. Days 5, 11, 50 &amp; 71 for subcutaneous cohorts</time_frame>
  </secondary_outcome>
  <secondary_outcome>
    <measure>Dose Normalized Maximum Observed Plasma Concentration Cmax</measure>
    <time_frame>Hours 0, 12, 24, 48, 72, 120, 168 for all cohorts. Hours 1, 3, 5, &amp; 8 for all i.v. cohorts. Hour 36 for i.v. cohorts 1-2. Days 15, 22, 29, and 36 for subcutaneous and i.v. cohorts 5 exp &amp; 6. Days 5, 11, 50 &amp; 71 for subcutaneous cohorts</time_frame>
  </secondary_outcome>
  <secondary_outcome>
    <measure>Time to Reach Maximum Observed Plasma Concentration (Tmax)</measure>
    <time_frame>Hours 0, 12, 24, 48, 72, 120, 168 for all cohorts. Hours 1, 3, 5, &amp; 8 for all i.v. cohorts. Hour 36 for i.v. cohorts 1-2. Days 15, 22, 29, and 36 for subcutaneous and i.v. cohorts 5 exp &amp; 6. Days 5, 11, 50 &amp; 71 for subcutaneous cohorts</time_frame>
  </secondary_outcome>
  <secondary_outcome>
    <measure>Area Under the Curve From Time Zero to Last Quantifiable Concentration (AUClast)</measure>
    <time_frame>Hours 0, 12, 24, 48, 72, 120, 168 for all cohorts. Hours 1, 3, 5, &amp; 8 for all i.v. cohorts. Hour 36 for i.v. cohorts 1-2. Days 15, 22, 29, and 36 for subcutaneous and i.v. cohorts 5 exp &amp; 6. Days 5, 11, 50 &amp; 71 for subcutaneous cohorts</time_frame>
    <description>Area under the plasma concentration time-curve from zero to the last measured concentration (AUClast)</description>
  </secondary_outcome>
  <secondary_outcome>
    <measure>Dose Normalized Area Under the Curve From Time Zero to Last Quantifiable Concentration (AUClast)</measure>
    <time_frame>Hours 0, 12, 24, 48, 72, 120, 168 for all cohorts. Hours 1, 3, 5, &amp; 8 for all i.v. cohorts. Hour 36 for i.v. cohorts 1-2. Days 15, 22, 29, and 36 for subcutaneous and i.v. cohorts 5 exp &amp; 6. Days 5, 11, 50 &amp; 71 for subcutaneous cohorts</time_frame>
  </secondary_outcome>
  <secondary_outcome>
    <measure>Area Under the Curve From Time Zero to Extrapolated Infinite Time (AUCinf)</measure>
    <time_frame>Hours 0, 12, 24, 48, 72, 120, 168 for all cohorts. Hours 1, 3, 5, &amp; 8 for all i.v. cohorts. Hour 36 for i.v. cohorts 1-2. Days 15, 22, 29, and 36 for subcutaneous and i.v. cohorts 5 exp &amp; 6. Days 5, 11, 50 &amp; 71 for subcutaneous cohorts</time_frame>
    <description>AUCinf = Area under the plasma concentration versus time curve (AUC) from time zero (pre-dose) to extrapolated infinite time (0-inf). It is obtained from AUC (0-t) plus AUC (t-inf).</description>
  </secondary_outcome>
  <secondary_outcome>
    <measure>Dose Normalized Area Under the Curve From Time Zero to Extrapolated Infinite Time (AUCinf)</measure>
    <time_frame>Hours 0, 12, 24, 48, 72, 120, 168 for all cohorts. Hours 1, 3, 5, &amp; 8 for all i.v. cohorts. Hour 36 for i.v. cohorts 1-2. Days 15, 22, 29, and 36 for subcutaneous and i.v. cohorts 5 exp &amp; 6. Days 5, 11, 50 &amp; 71 for subcutaneous cohorts</time_frame>
  </secondary_outcome>
  <secondary_outcome>
    <measure>Plasma Decay Half-Life (t1/2)</measure>
    <time_frame>Hours 0, 12, 24, 48, 72, 120, 168 for all cohorts. Hours 1, 3, 5, &amp; 8 for all i.v. cohorts. Hour 36 for i.v. cohorts 1-2. Days 15, 22, 29, and 36 for subcutaneous and i.v. cohorts 5 exp &amp; 6. Days 5, 11, 50 &amp; 71 for subcutaneous cohorts</time_frame>
    <description>Plasma decay half-life is the time measured for the plasma concentration to decrease by one half.</description>
  </secondary_outcome>
  <secondary_outcome>
    <measure>Apparent Clearance (CL)</measure>
    <time_frame>Hours 0, 12, 24, 48, 72, 120, 168 for all cohorts. Hours 1, 3, 5, &amp; 8 for all i.v. cohorts. Hour 36 for i.v. cohorts 1-2. Days 15, 22, 29, and 36 for subcutaneous and i.v. cohorts 5 exp &amp; 6. Days 5, 11, 50 &amp; 71 for subcutaneous cohorts</time_frame>
    <description>Steady state total body clearance equals infusion rate (zero order) divided by steady state plasma concentration of study drug (R0/Css)</description>
  </secondary_outcome>
  <secondary_outcome>
    <measure>Incidence of Anti-Drug Antibody (ADA)</measure>
    <time_frame>Baseline, study days 8, 15, and 36 for all dose cohorts plus day 71 for subcu cohorts</time_frame>
  </secondary_outcome>
  <secondary_outcome>
    <measure>Characterization of biomarker changes</measure>
    <time_frame>Day -1, hours 0, 5, 12, 24, 48, 72 for all cohorts. Hours 1 (or end of infusion, 8, 120 and days 11 &amp; 29 for i.v. cohorts Days 5, 8, 15, 36 &amp; 71 for subcutaneous cohorts.</time_frame>
  </secondary_outcome>
  <number_of_arms>5</number_of_arms>
  <enrollment type="Actual">58</enrollment>
  <condition>Healthy</condition>
  <condition>Primary Immune Thrombocytopenia</condition>
  <condition>Polyradiculoneuropathy, Chronic Inflammatory Demyelinating</condition>
  <arm_group>
    <arm_group_label>PF-06755347 intravenous healthy participant</arm_group_label>
    <arm_group_type>Experimental</arm_group_type>
    <description>intravenous administration</description>
  </arm_group>
  <arm_group>
    <arm_group_label>Placebo intravenous healthy participant</arm_group_label>
    <arm_group_type>Placebo Comparator</arm_group_type>
    <description>intravenous administration</description>
  </arm_group>
  <arm_group>
    <arm_group_label>PF-06755347 subcutaneous healthy participant</arm_group_label>
    <arm_group_type>Experimental</arm_group_type>
    <description>subcutaneous administration</description>
  </arm_group>
  <arm_group>
    <arm_group_label>Placebo subcutaneous healthy participant</arm_group_label>
    <arm_group_type>Placebo Comparator</arm_group_type>
    <description>subcutaneous administration</description>
  </arm_group>
  <arm_group>
    <arm_group_label>PF-06755347 subcutaneous ITP</arm_group_label>
    <arm_group_type>Experimental</arm_group_type>
    <description>subcutaneous</description>
  </arm_group>
  <intervention>
    <intervention_type>Drug</intervention_type>
    <intervention_name>PF-06755347 intravenous healthy participant</intervention_name>
    <description>Single doses of PF-06755347 will be administered intravenously dose levels 1, 2, 3, 4, 5, and 6.</description>
    <arm_group_label>PF-06755347 intravenous healthy participant</arm_group_label>
  </intervention>
  <intervention>
    <intervention_type>Drug</intervention_type>
    <intervention_name>Placebo intravenous healthy participant</intervention_name>
    <description>Placebo comparator</description>
    <arm_group_label>Placebo intravenous healthy participant</arm_group_label>
  </intervention>
  <intervention>
    <intervention_type>Drug</intervention_type>
    <intervention_name>PF-06755347 subcutaneous healthy participant</intervention_name>
    <description>single doses of PF-06755347 will be administered subcutaneously at dose levels of SC1, SC2, SC3, SC4, and SC5.</description>
    <arm_group_label>PF-06755347 subcutaneous healthy participant</arm_group_label>
  </intervention>
  <intervention>
    <intervention_type>Drug</intervention_type>
    <intervention_name>Placebo subcutaneous healthy participant</intervention_name>
    <description>placebo comparator</description>
    <arm_group_label>Placebo subcutaneous healthy participant</arm_group_label>
  </intervention>
  <intervention>
    <intervention_type>Drug</intervention_type>
    <intervention_name>PF-06755347 subcutaneous ITP</intervention_name>
    <description>single doses of PF-06755347 will be administered subcutaneously at 2 dose levels tested in healthy participants</description>
    <arm_group_label>PF-06755347 subcutaneous ITP</arm_group_label>
  </intervention>
  <eligibility>
    <criteria>
      <textblock>
        Inclusion Criteria Healthy male participants:&#xD;
&#xD;
          -  at the time of screening, are between the ages of 18 and 55 years, inclusive. Healthy&#xD;
             is defined as no clinically relevant abnormalities identified by a detailed medical&#xD;
             history, full physical examination, including oral temperature, blood pressure (BP)&#xD;
             and pulse rate measurement, pulse oximetry, 12 lead ECG or clinical laboratory tests.&#xD;
&#xD;
          -  Evidence of a personally signed and dated informed consent document indicating that&#xD;
             the subject has been informed of all pertinent aspects of the study.&#xD;
&#xD;
          -  Chest X ray with no evidence of current, active tuberculosis (TB) or previous inactive&#xD;
             TB, general infections, heart failure, malignancy, or other clinically significant&#xD;
             abnormalities taken at Screening or within 3 months prior to Screening and read by a&#xD;
             qualified radiologist.&#xD;
&#xD;
        Exclusion Criteria for Healthy male participants:&#xD;
&#xD;
          -  Evidence or history of clinically significant hematological, renal, endocrine,&#xD;
             pulmonary, gastrointestinal, cardiovascular, hepatic, psychiatric, neurologic, or&#xD;
             allergic disease (including drug allergies, but excluding untreated, asymptomatic,&#xD;
             seasonal allergies at the time of dosing).&#xD;
&#xD;
          -  Participants with a history of autoimmune disorders and other conditions that&#xD;
             compromise or impair the immune system (including but not limited to: Crohns Disease,&#xD;
             rheumatoid arthritis, scleroderma, systemic lupus erythematosus, Graves disease, and&#xD;
             asthma) or have a current positive result for the following; rheumatoid factor,&#xD;
             anti-nuclear antibody, or abnormal free triiodothyronine (T3), free thyroxine (T4),&#xD;
             thyroid stimulating hormone (TSH), or thyroid stimulating antibody (TSAb) suggestive&#xD;
             of thyroid disease.&#xD;
&#xD;
          -  Subjects with a history of allergic or anaphylactic reaction to any drug including&#xD;
             immunoglobulin.&#xD;
&#xD;
          -  History of active infections within 28 days prior to the screening visit.&#xD;
&#xD;
          -  Subjects with a history of or current positive results for any of the following&#xD;
             serological tests: Hepatitis B surface antigen (HepBsAg), Hepatitis B core antibody&#xD;
             (HepBcAb), Hepatitis C antibody (HCVAb) or human immunodeficiency virus (HIV).&#xD;
&#xD;
          -  Subjects with a history of thromboembolic events.&#xD;
&#xD;
          -  History of TB or active, latent or inadequately treated TB infection. All positive TB&#xD;
             test result(s) are exclusionary&#xD;
&#xD;
          -  Male subjects with partners currently pregnant; male subjects able to father children&#xD;
             who are unwilling or unable to use a highly effective method of contraception as&#xD;
             outlined in this protocol for the duration of the study.&#xD;
&#xD;
          -  Inclusion Criteria for ITP participants:&#xD;
&#xD;
        Female participants may be of childbearing potential or non-childbearing potential.&#xD;
&#xD;
        -Diagnosis of Primary ITP. ITP must be diagnosed in accordance with established guidelines.&#xD;
        ITP duration-Persistent (&gt;3 months and ≤12 months) OR Chronic (&gt;12 months).&#xD;
&#xD;
        AND&#xD;
&#xD;
          -  Platelet count 30-75 x 10E9/L (inclusive) with criteria achieved on 2 qualifying&#xD;
             counts at least 5 days apart and within approx. 10 days of dosing&#xD;
&#xD;
          -  Participants must have received and responded to IVIg or corticosteroids as treatment&#xD;
             for ITP (response is defined as achievement of platelet count &gt;50 x 109/L and doubling&#xD;
             of platelet count from baseline).&#xD;
&#xD;
             --Evidence of a personally signed and dated informed consent document indicating that&#xD;
             the subject has been informed of all pertinent aspects of the study.&#xD;
&#xD;
          -  BMI of 17.5 to 30.5 kg/m2 and a total body weight &gt;40 kg (88 lbs).&#xD;
&#xD;
        Exclusion Criteria for ITP participants&#xD;
&#xD;
          -  History of clinically significant hematological (other than ITP), renal, endocrine,&#xD;
             metabolic, pulmonary, gastrointestinal, cardiovascular, hepatic, psychiatric,&#xD;
             neurologic, or allergic disease (but excluding untreated, asymptomatic, seasonal&#xD;
             allergies at the time of dosing).&#xD;
&#xD;
          -  Chest X-ray with evidence of current, active TB, previous inactive TB, general&#xD;
             infections, heart failure, malignancy, or other clinically significant abnormalities.&#xD;
&#xD;
        Chest x-ray must be taken at Screening or within 3 months prior to Screening and read by a&#xD;
        qualified radiologist.&#xD;
&#xD;
          -  Any bleeding event requiring medical evaluation or treatment in the 4 weeks prior to&#xD;
             screening or current bleeding event that requires treatment.&#xD;
&#xD;
          -  Scheduled or anticipated invasive procedures (eg, surgery, dental procedures) within&#xD;
             28 days following PF-06755347 dosing.&#xD;
&#xD;
          -  Splenectomy within ≤180 days prior to PF-06755347 dosing or splenectomy planned during&#xD;
             the period of the study.&#xD;
&#xD;
          -  History of any active autoimmune disorder (other than ITP) or other conditions that&#xD;
             may compromise or impair the immune system (including but not limited to: Crohn's&#xD;
             Disease, rheumatoid arthritis, scleroderma, systemic lupus erythematosus, Graves'&#xD;
             disease, and asthma).&#xD;
&#xD;
          -  History of allergic or anaphylactic reaction to any drug including immunoglobulin.&#xD;
&#xD;
          -  History of active infections within 28 days prior to the screening visit.&#xD;
&#xD;
          -  History of Hepatitis B, Hepatitis C or HIV or current positive results for any of the&#xD;
             following serological tests - HBsAg, HBcAb, HCVAb or HIV.&#xD;
&#xD;
          -  History of thromboembolic events&#xD;
&#xD;
          -  Hemoglobin &lt;9 g/dL.&#xD;
&#xD;
          -  Positive Direct Coombs test&#xD;
      </textblock>
    </criteria>
    <gender>All</gender>
    <minimum_age>18 Years</minimum_age>
    <maximum_age>55 Years</maximum_age>
    <healthy_volunteers>Accepts Healthy Volunteers</healthy_volunteers>
  </eligibility>
  <overall_official>
    <last_name>Pfizer CT.gov Call Center</last_name>
    <role>Study Director</role>
    <affiliation>Pfizer</affiliation>
  </overall_official>
  <location>
    <facility>
      <name>Pfizer New Haven Clinical Research Unit</name>
      <address>
        <city>New Haven</city>
        <state>Connecticut</state>
        <zip>06511</zip>
        <country>United States</country>
      </address>
    </facility>
  </location>
  <location>
    <facility>
      <name>Pfizer Clinical Research Unit</name>
      <address>
        <city>Brussels</city>
        <zip>B-1070</zip>
        <country>Belgium</country>
      </address>
    </facility>
  </location>
  <location>
    <facility>
      <name>NZCR (New Zealand Clinical Research) OPCO Limited</name>
      <address>
        <city>Christchurch</city>
        <zip>8011</zip>
        <country>New Zealand</country>
      </address>
    </facility>
  </location>
  <location>
    <facility>
      <name>Hospital Universitario La Paz</name>
      <address>
        <city>Madrid</city>
        <zip>28046</zip>
        <country>Spain</country>
      </address>
    </facility>
  </location>
  <location>
    <facility>
      <name>Hospital Universitario Virgen del Rocío</name>
      <address>
        <city>Sevilla</city>
        <zip>41013</zip>
        <country>Spain</country>
      </address>
    </facility>
  </location>
  <location>
    <facility>
      <name>Hammersmith Medicines Research (HMR)</name>
      <address>
        <city>London</city>
        <zip>NW10 7EW</zip>
        <country>United Kingdom</country>
      </address>
    </facility>
  </location>
  <location_countries>
    <country>Belgium</country>
    <country>New Zealand</country>
    <country>Spain</country>
    <country>United Kingdom</country>
    <country>United States</country>
  </location_countries>
  <link>
    <url>https://pmiform.com/clinical-trial-info-request?StudyID=B7801001</url>
    <description>To obtain contact information for a study center near you, click here.</description>
  </link>
  <verification_date>May 2023</verification_date>
  <study_first_submitted>July 6, 2017</study_first_submitted>
  <study_first_submitted_qc>September 5, 2017</study_first_submitted_qc>
  <study_first_posted type="Actual">September 8, 2017</study_first_posted>
  <last_update_submitted>May 26, 2023</last_update_submitted>
  <last_update_submitted_qc>May 26, 2023</last_update_submitted_qc>
  <last_update_posted type="Actual">May 31, 2023</last_update_posted>
  <responsible_party>
    <responsible_party_type>Sponsor</responsible_party_type>
  </responsible_party>
  <condition_browse>
    <!-- CAUTION:  The following MeSH terms are assigned with an imperfect algorithm            -->
    <mesh_term>Polyradiculoneuropathy</mesh_term>
    <mesh_term>Polyradiculoneuropathy, Chronic Inflammatory Demyelinating</mesh_term>
    <mesh_term>Thrombocytopenia</mesh_term>
    <mesh_term>Purpura, Thrombocytopenic, Idiopathic</mesh_term>
  </condition_browse>
  <patient_data>
    <sharing_ipd>No</sharing_ipd>
    <ipd_description>Pfizer will provide access to individual de-identified participant data and related study documents (e.g. protocol, Statistical Analysis Plan (SAP), Clinical Study Report (CSR)) upon request from qualified researchers, and subject to certain criteria, conditions, and exceptions. Further details on Pfizer's data sharing criteria and process for requesting access can be found at: https://www.pfizer.com/science/clinical_trials/trial_data_and_results/data_requests.</ipd_description>
  </patient_data>
  <!-- Results have not yet been posted for this study                                          -->
</clinical_study>


download date: ClinicalTrials.gov processed this data on September 20, 2023
link text: Link to the current ClinicalTrials.gov record.
url: https://clinicaltrials.gov/ct2/show/NCT03275740
org study id: B7801001
secondary id: 2018-003315-21
nct id: NCT03275740
lead sponsor: 
has dmc: No
is fda regulated drug: Yes
is fda regulated device: No
This phase 1 single ascending dose study will provide a first in human assessment of safety
      and tolerability of PF-06755347 in healthy adult males as well as adult males and females
      with Immune Thrombocytopenia (ITP). Pharmacokinetics and pharmacodynamics will also be
      evaluated.
allocation: Randomized
intervention model: Sequential Assignment
intervention model description: single ascending dose study
primary purpose: Treatment
masking: Double (Participant, Investigator)
masking description: Double blind (investigator and subject), sponsor open in healthy male participants. Masking will not be applied for participants with ITP (all ITP participants will receive PF-06755347).
measure: Number of Participants With Treatment Emergent Treatment-Related Adverse Events (AEs)
time frame: Baseline (study day -2) through study completion (study day 36 for intravenous dose cohorts 1 - 6, and study day 71 for subcutaneous dose cohorts.
measure: Number of Participants With Clinical Laboratory Abnormalities
time frame: Baseline, study days 1, 2, 4, 6, 8, 11, 15, 22, 29 and 36 for i.v. dose cohorts 1 - 6, and Baseline, study days 1, 2, 3, 4, 6, 8, 11, 15, 22, 29, 36, 50 and day 71 for subcutaneous dose cohorts.
description: Safety laboratory includes Hematology, Chemistry, Urinalysis, prothrombin time/international normalized ratio, partial thromboplastin time, D dimer, and fibrinogen
measure: Number of Participants With Categorical Vital Signs Data
time frame: Baseline, study days 1, 2, 3, 4, 6, 8, 11, 15, 22, 29, and day 36 for i.v. dose cohorts 1 - 6 and Baseline, study days 1, 2, 3, 4, 6, 8, 11, 15, 22, 29, 36, 50 and day 71 for subcutaneous dose cohorts.
description: Vital signs include blood pressure, pulse rate, and body temperature. Number of participants with maximum increase from Baseline in sitting SBP and DBP of greater than or equal to 30 mmHg will be reported
measure: Number of Participants With Abnormal Electrocardiogram (ECG)
time frame: Baseline (study day 1, pre-dose), study days 1 (post dose), 2, 4, 6, 8, 11, 22, 36 (end of study visit for intravenous dose cohorts 1 - 6, and end of study visit day 71) for subcutaneous dose cohorts.
description: Criteria for ECG abnormalities: maximum PR interval >=300 milliseconds (msec) and maximum increase PR interval increase from baseline (IFB): percent change (Pctchg) >=25 percent (%) for baseline value of >200 msec and Pctchg>=50% for baseline value of <=200 msec for PR interval, maximum QRS interval >=140 msec and a maximum IFB: Pctchg>=50%, maximum QTCF interval (Fridericia's Correction) of 450 msec to <480 msec, 480 msec to <500 msec or >=500 msec and a maximum change of <=30change<60 or >=60 msec from baseline.
measure: Maximum Observed Plasma Concentration (Cmax)
time frame: Hours 0, 12, 24, 48, 72, 120, 168 for all cohorts. Hours 1, 3, 5, & 8 for all i.v. cohorts. Hour 36 for i.v. cohorts 1-2. Days 15, 22, 29, and 36 for subcutaneous and i.v. cohorts 5 exp & 6. Days 5, 11, 50 & 71 for subcutaneous cohorts
measure: Dose Normalized Maximum Observed Plasma Concentration Cmax
time frame: Hours 0, 12, 24, 48, 72, 120, 168 for all cohorts. Hours 1, 3, 5, & 8 for all i.v. cohorts. Hour 36 for i.v. cohorts 1-2. Days 15, 22, 29, and 36 for subcutaneous and i.v. cohorts 5 exp & 6. Days 5, 11, 50 & 71 for subcutaneous cohorts
measure: Time to Reach Maximum Observed Plasma Concentration (Tmax)
time frame: Hours 0, 12, 24, 48, 72, 120, 168 for all cohorts. Hours 1, 3, 5, & 8 for all i.v. cohorts. Hour 36 for i.v. cohorts 1-2. Days 15, 22, 29, and 36 for subcutaneous and i.v. cohorts 5 exp & 6. Days 5, 11, 50 & 71 for subcutaneous cohorts
measure: Area Under the Curve From Time Zero to Last Quantifiable Concentration (AUClast)
time frame: Hours 0, 12, 24, 48, 72, 120, 168 for all cohorts. Hours 1, 3, 5, & 8 for all i.v. cohorts. Hour 36 for i.v. cohorts 1-2. Days 15, 22, 29, and 36 for subcutaneous and i.v. cohorts 5 exp & 6. Days 5, 11, 50 & 71 for subcutaneous cohorts
description: Area under the plasma concentration time-curve from zero to the last measured concentration (AUClast)
measure: Dose Normalized Area Under the Curve From Time Zero to Last Quantifiable Concentration (AUClast)
time frame: Hours 0, 12, 24, 48, 72, 120, 168 for all cohorts. Hours 1, 3, 5, & 8 for all i.v. cohorts. Hour 36 for i.v. cohorts 1-2. Days 15, 22, 29, and 36 for subcutaneous and i.v. cohorts 5 exp & 6. Days 5, 11, 50 & 71 for subcutaneous cohorts
measure: Area Under the Curve From Time Zero to Extrapolated Infinite Time (AUCinf)
time frame: Hours 0, 12, 24, 48, 72, 120, 168 for all cohorts. Hours 1, 3, 5, & 8 for all i.v. cohorts. Hour 36 for i.v. cohorts 1-2. Days 15, 22, 29, and 36 for subcutaneous and i.v. cohorts 5 exp & 6. Days 5, 11, 50 & 71 for subcutaneous cohorts
description: AUCinf = Area under the plasma concentration versus time curve (AUC) from time zero (pre-dose) to extrapolated infinite time (0-inf). It is obtained from AUC (0-t) plus AUC (t-inf).
measure: Dose Normalized Area Under the Curve From Time Zero to Extrapolated Infinite Time (AUCinf)
time frame: Hours 0, 12, 24, 48, 72, 120, 168 for all cohorts. Hours 1, 3, 5, & 8 for all i.v. cohorts. Hour 36 for i.v. cohorts 1-2. Days 15, 22, 29, and 36 for subcutaneous and i.v. cohorts 5 exp & 6. Days 5, 11, 50 & 71 for subcutaneous cohorts
measure: Plasma Decay Half-Life (t1/2)
time frame: Hours 0, 12, 24, 48, 72, 120, 168 for all cohorts. Hours 1, 3, 5, & 8 for all i.v. cohorts. Hour 36 for i.v. cohorts 1-2. Days 15, 22, 29, and 36 for subcutaneous and i.v. cohorts 5 exp & 6. Days 5, 11, 50 & 71 for subcutaneous cohorts
description: Plasma decay half-life is the time measured for the plasma concentration to decrease by one half.
measure: Apparent Clearance (CL)
time frame: Hours 0, 12, 24, 48, 72, 120, 168 for all cohorts. Hours 1, 3, 5, & 8 for all i.v. cohorts. Hour 36 for i.v. cohorts 1-2. Days 15, 22, 29, and 36 for subcutaneous and i.v. cohorts 5 exp & 6. Days 5, 11, 50 & 71 for subcutaneous cohorts
description: Steady state total body clearance equals infusion rate (zero order) divided by steady state plasma concentration of study drug (R0/Css)
measure: Incidence of Anti-Drug Antibody (ADA)
time frame: Baseline, study days 8, 15, and 36 for all dose cohorts plus day 71 for subcu cohorts
measure: Characterization of biomarker changes
time frame: Day -1, hours 0, 5, 12, 24, 48, 72 for all cohorts. Hours 1 (or end of infusion, 8, 120 and days 11 & 29 for i.v. cohorts Days 5, 8, 15, 36 & 71 for subcutaneous cohorts.
arm group label: PF-06755347 intravenous healthy participant
arm group type: Experimental
description: intravenous administration
arm group label: Placebo intravenous healthy participant
arm group type: Placebo Comparator
description: intravenous administration
arm group label: PF-06755347 subcutaneous healthy participant
arm group type: Experimental
description: subcutaneous administration
arm group label: Placebo subcutaneous healthy participant
arm group type: Placebo Comparator
description: subcutaneous administration
arm group label: PF-06755347 subcutaneous ITP
arm group type: Experimental
description: subcutaneous
intervention type: Drug
intervention name: PF-06755347 intravenous healthy participant
description: Single doses of PF-06755347 will be administered intravenously dose levels 1, 2, 3, 4, 5, and 6.
arm group label: PF-06755347 intravenous healthy participant
intervention type: Drug
intervention name: Placebo intravenous healthy participant
description: Placebo comparator
arm group label: Placebo intravenous healthy participant
intervention type: Drug
intervention name: PF-06755347 subcutaneous healthy participant
description: single doses of PF-06755347 will be administered subcutaneously at dose levels of SC1, SC2, SC3, SC4, and SC5.
arm group label: PF-06755347 subcutaneous healthy participant
intervention type: Drug
intervention name: Placebo subcutaneous healthy participant
description: placebo comparator
arm group label: Placebo subcutaneous healthy participant
intervention type: Drug
intervention name: PF-06755347 subcutaneous ITP
description: single doses of PF-06755347 will be administered subcutaneously at 2 dose levels tested in healthy participants
arm group label: PF-06755347 subcutaneous ITP
criteria: 
gender: All
minimum age: 18 Years
maximum age: 55 Years
healthy volunteers: Accepts Healthy Volunteers
last name: Pfizer CT.gov Call Center
role: Study Director
affiliation: Pfizer
facility: 
facility: 
facility: 
facility: 
facility: 
facility: 
country: Belgium
country: New Zealand
country: Spain
country: United Kingdom
country: United States
url: https://pmiform.com/clinical-trial-info-request?StudyID=B7801001
description: To obtain contact information for a study center near you, click here.
responsible party type: Sponsor
mesh term: Polyradiculoneuropathy
mesh term: Polyradiculoneuropathy, Chronic Inflammatory Demyelinating
mesh term: Thrombocytopenia
mesh term: Purpura, Thrombocytopenic, Idiopathic
sharing ipd: No
ipd description: Pfizer will provide access to individual de-identified participant data and related study documents (e.g. protocol, Statistical Analysis Plan (SAP), Clinical Study Report (CSR)) upon request from qualified researchers, and subject to certain criteria, conditions, and exceptions. Further details on Pfizer's data sharing criteria and process for requesting access can be found at: https://www.pfizer.com/science/clinical_trials/trial_data_and_results/data_requests.