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NCT02487095 · OUTCOME

Phase I: Number of Participants With a Change in H2AX Phosphorylation (ƴH2AX) Levels in Hairs From Baseline (Day 1 Pre-Treatment)

Trial of Topotecan With VX-970 (M6620), an ATR Kinase Inhibitor, in Small Cell Cancers and Extrapulmonary Small Cell Cancers · Source last updated 2025-04-13

Results reported by the registry submitting party. Population, time horizon, units and missing values must be read together.

Measure
COUNT_OF_PARTICIPANTS
Unit
Participants
Interval / dispersion
Not reported
Time frame
Day 1 Pre-Treatment, Post treatment on day 2, and Post treatment on day 3

What was measured

Hair samples were obtained from participants to determine a change in H2AX phosphorylation (named ƴH2AX) in the hair follicles when compared to baseline (day 1 pre-treatment). ƴH2AX signals were detected by immunochemistry (microscopy) by using an antibody specific against ƴH2AX that, in turn, was detected by a secondary antibody conjugated to a fluorescent probe. ƴH2AX signal intensity was measured in bottom of hair bulbs. A change is defined as change in ƴH2AX signal (fluorescence intensity) in cells located toward the top of the hair bulbs.

Analysis population: 17/21 participants were analyzed in Phase I DL1 because these 17 patients had good quality hair samples (plucked hairs with good hair bulbs).

Groups in this outcome

Phase I DL1 Topotecan 1mg/m^2 Intravenous (IV) (Days 1-5); VX970 (M6620) 140mg/m^2 IV on Day 5

Phase I Dose Level (DL) 1 Topotecan 1mg/m\^2 intravenous (IV) (days 1-5); VX970 (M6620) 140mg/m\^2 IV on day 5

Phase I DL2 Topotecan 1mg/m^2 Intravenous (IV) (Days 1-5); VX970 (M6620) 140mg/m^2 IV on Day 2, 5

Phase I Dose Level (DL) 2 Topotecan 1mg/m\^2 intravenous (IV) (days 1-5); VX970 (M6620) 140mg/m\^2 IV on day 2, 5

Phase I DL3 Topotecan 1.25mg/m^2 Intravenous(IV) (Days 1-5); VX970 (M6620) 140mg/m^2 IV on Day 2, 5

Phase I Dose Level (DL) 3 Topotecan 1.25mg/m\^2 intravenous (IV) (days 1-5); VX970 (M6620) 140mg/m\^2 IV on day 2, 5

Phase I DL4 Topotecan 1.25mg/m^2 Intravenous(IV) (Days 1-5); VX970 (M6620) 210mg/m^2 IV on Day 2, 5

Phase I Dose Level (DL) 4 Topotecan 1.25mg/m\^2 intravenous (IV) (days 1-5); VX970 (M6620) 210mg/m\^2 IV on day 2, 5

Group identifiers and denominators belong to this outcome only. They may differ in another outcome or in safety reporting.

Analysis denominator · Participants

GroupSource count
Phase I DL1 Topotecan 1mg/m^2 Intravenous (IV) (Days 1-5); VX970 (M6620) 140mg/m^2 IV on Day 55
Phase I DL2 Topotecan 1mg/m^2 Intravenous (IV) (Days 1-5); VX970 (M6620) 140mg/m^2 IV on Day 2, 54
Phase I DL3 Topotecan 1.25mg/m^2 Intravenous(IV) (Days 1-5); VX970 (M6620) 140mg/m^2 IV on Day 2, 53
Phase I DL4 Topotecan 1.25mg/m^2 Intravenous(IV) (Days 1-5); VX970 (M6620) 210mg/m^2 IV on Day 2, 55

Reported measurements

Post treatment on day 2
Values in Participants · Interval/dispersion: Not reported
GroupValueSpreadLowerUpperComment
Phase I DL1 Topotecan 1mg/m^2 Intravenous (IV) (Days 1-5); VX970 (M6620) 140mg/m^2 IV on Day 54Not reportedNot reportedNot reportedNot reported
Phase I DL2 Topotecan 1mg/m^2 Intravenous (IV) (Days 1-5); VX970 (M6620) 140mg/m^2 IV on Day 2, 54Not reportedNot reportedNot reportedNot reported
Phase I DL3 Topotecan 1.25mg/m^2 Intravenous(IV) (Days 1-5); VX970 (M6620) 140mg/m^2 IV on Day 2, 53Not reportedNot reportedNot reportedNot reported
Phase I DL4 Topotecan 1.25mg/m^2 Intravenous(IV) (Days 1-5); VX970 (M6620) 210mg/m^2 IV on Day 2, 55Not reportedNot reportedNot reportedNot reported
Post treatment on day 3
Values in Participants · Interval/dispersion: Not reported
GroupValueSpreadLowerUpperComment
Phase I DL1 Topotecan 1mg/m^2 Intravenous (IV) (Days 1-5); VX970 (M6620) 140mg/m^2 IV on Day 55Not reportedNot reportedNot reportedNot reported
Phase I DL2 Topotecan 1mg/m^2 Intravenous (IV) (Days 1-5); VX970 (M6620) 140mg/m^2 IV on Day 2, 54Not reportedNot reportedNot reportedNot reported
Phase I DL3 Topotecan 1.25mg/m^2 Intravenous(IV) (Days 1-5); VX970 (M6620) 140mg/m^2 IV on Day 2, 53Not reportedNot reportedNot reportedNot reported
Phase I DL4 Topotecan 1.25mg/m^2 Intravenous(IV) (Days 1-5); VX970 (M6620) 210mg/m^2 IV on Day 2, 55Not reportedNot reportedNot reportedNot reported
Complete source fields
classes
  1. categories
    1. measurements
      1. group Id
        OG000
        value
        4
      2. group Id
        OG001
        value
        4
      3. group Id
        OG002
        value
        3
      4. group Id
        OG003
        value
        5
    title
    Post treatment on day 2
  2. categories
    1. measurements
      1. group Id
        OG000
        value
        5
      2. group Id
        OG001
        value
        4
      3. group Id
        OG002
        value
        3
      4. group Id
        OG003
        value
        5
    title
    Post treatment on day 3
denoms
  1. counts
    1. group Id
      OG000
      value
      5
    2. group Id
      OG001
      value
      4
    3. group Id
      OG002
      value
      3
    4. group Id
      OG003
      value
      5
    units
    Participants
description
Hair samples were obtained from participants to determine a change in H2AX phosphorylation (named ƴH2AX) in the hair follicles when compared to baseline (day 1 pre-treatment). ƴH2AX signals were detected by immunochemistry (microscopy) by using an antibody specific against ƴH2AX that, in turn, was detected by a secondary antibody conjugated to a fluorescent probe. ƴH2AX signal intensity was measured in bottom of hair bulbs. A change is defined as change in ƴH2AX signal (fluorescence intensity) in cells located toward the top of the hair bulbs.
groups
  1. description
    Phase I Dose Level (DL) 1 Topotecan 1mg/m\^2 intravenous (IV) (days 1-5); VX970 (M6620) 140mg/m\^2 IV on day 5
    id
    OG000
    title
    Phase I DL1 Topotecan 1mg/m^2 Intravenous (IV) (Days 1-5); VX970 (M6620) 140mg/m^2 IV on Day 5
  2. description
    Phase I Dose Level (DL) 2 Topotecan 1mg/m\^2 intravenous (IV) (days 1-5); VX970 (M6620) 140mg/m\^2 IV on day 2, 5
    id
    OG001
    title
    Phase I DL2 Topotecan 1mg/m^2 Intravenous (IV) (Days 1-5); VX970 (M6620) 140mg/m^2 IV on Day 2, 5
  3. description
    Phase I Dose Level (DL) 3 Topotecan 1.25mg/m\^2 intravenous (IV) (days 1-5); VX970 (M6620) 140mg/m\^2 IV on day 2, 5
    id
    OG002
    title
    Phase I DL3 Topotecan 1.25mg/m^2 Intravenous(IV) (Days 1-5); VX970 (M6620) 140mg/m^2 IV on Day 2, 5
  4. description
    Phase I Dose Level (DL) 4 Topotecan 1.25mg/m\^2 intravenous (IV) (days 1-5); VX970 (M6620) 210mg/m\^2 IV on day 2, 5
    id
    OG003
    title
    Phase I DL4 Topotecan 1.25mg/m^2 Intravenous(IV) (Days 1-5); VX970 (M6620) 210mg/m^2 IV on Day 2, 5
param Type
COUNT_OF_PARTICIPANTS
population Description
17/21 participants were analyzed in Phase I DL1 because these 17 patients had good quality hair samples (plucked hairs with good hair bulbs).
reporting Status
POSTED
time Frame
Day 1 Pre-Treatment, Post treatment on day 2, and Post treatment on day 3
title
Phase I: Number of Participants With a Change in H2AX Phosphorylation (ƴH2AX) Levels in Hairs From Baseline (Day 1 Pre-Treatment)
type
SECONDARY
unit Of Measure
Participants

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Preserved source evidence · Not medical advice