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CompletedNCT03433924POLARISUpdated Mar 27, 2024

An Epidemiologic Study on PD-L1 Expression Combined With Clinical Observation in the Chinese MIUBC Patients.

An observational study in Urinary Bladder Cancer, sponsored by AstraZeneca. Completed at 17 sites in China. Open to participants aged 18 Years and older. Per ClinicalTrials.gov, last updated 2024-03-27.

Sponsored by AstraZeneca · Observational

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Study type
Observational
Model
Cohort
Time perspective
Prospective
Enrollment
248
Ages
18 Years and older
Sex
All
01

Where this study stands

Counted across the records on this site · 2026-11-13

Among 20 studies in Urinary Bladder Neoplasms by AstraZeneca — 5 open to participants now, 11 under way, 4 of them phase 3. Urinary Bladder Neoplasms · AstraZeneca.

Started
2020
with 1 other
Observational
6 of 20
2 open now
Registered
6th of 20
by date

Among the 20 studies in Urinary Bladder Neoplasms by AstraZeneca, this one is one of 2 that started in 2020, is one of 6 observational ones, and was the 6th registered.

Urinary Bladder Neoplasms

1,800 studies on the registry are indexed under Urinary Bladder Neoplasms; 446 are open to participants now.

Browse Urinary Bladder Neoplasms studies →

Open to participants now

5 of the 20 studies in Urinary Bladder Neoplasms by AstraZeneca are open now, in 12 countries. Recruiting first, the newest first:

By country, each count listing its studies:

All 5 open studies →

Who these studies take

Of the 336 Urinary Bladder Neoplasms studies recruiting now, 256 (76%) set no upper age limit and 22 (7%) stop at 75 or younger; 22 take children under 18; 21 take healthy volunteers.

This study: 18 Years and older · all sexes · no healthy volunteers.

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02

Study summary

The Primary Objective of this observational study is to investigate the prevalence of high PD-L1 expression in Chinese MIUBC patients.

Read the detailed description

The primary objective of this observational study is:

•To investigate the prevalence of high PD-L1 expression in Chinese MIUBC patients. High PD-L1 expression is defined as ≥25% tumor cell membrane positivity for PD-L1 at any intensity above background staining as noted on the corresponding negative control OR ≥25% tumor associated immune cell positivity for PD-L1 at any intensity above background staining as noted on the corresponding negative control.

Note: PD-L1 High (>=25% tumor cell membrane positivity for PD-L1 or 1) IF IC area >1%: >=25% tumor associated immune cell positivity for PD-L1; 2) If IC area=1%: 100% tumor associated immune cell positivity for PD-L1). PD-L1 Low if criteria not met for PD-L1 High.

The second objectives of this observational study are:

  • To investigate the PD-L1 expression profile in TC or IC in Chinese MIUBC patients.
  • To assess the concordance of PD-L1 testing results generated from the hospital labs with those from the central lab.
  • To observe the initial treatment pattern for MIUBC patients in usual clinical practice in China.
  • To observe 2-year OS of the Chinese MIUBC patients.

The exploratory objectives of this observational study are:

  • To explore the relationship between the demographic characteristics and expression of PD-L1 and other exploratory biomarkers including immune cell (IC) subset CD8+ T cells and tumor mutation burden (TMB).
  • To explore the relationship between OS and the demographic characteristics as well as the expression of biomarkers.
  • To explore the relationship between PD-L1 and TMB, PD-L1 and CD8 positive T cell respectively.
03

Conditions studied

  • Urinary Bladder Cancer
04

Who can participate

Ages eligible
18 Years and older
Sexes eligible
All
Accepts healthy volunteers
No
Sampling method
Probability sample

Study population

Patients with a new diagnosis of MIUBC

Go through the criteria one by one — yes, no or not sure — and take the list to your doctor or the study team. Kept in this browser only.

Inclusion criteria

  • Age ≥18 years at the time of screening.
  • Be able and willing to sign the form (ICF).
  • Patients with or cytologically documented, muscle invasive urothelial carcinoma (ie, T2 toT4, any N, any M) of bladder (see National Comprehensive Cancer Network [NCCN] Bladder Cancer Guidelines), who had not been previously treated with any systemic chemotherapy, radiotherapy, product, or biologic therapy for cancer treatment.
  • For testing by IHC assay, all patients were able to provide a newly acquired tumor sample within 60 days before enrollment by cystectomy, transurethral resection or . Samples with limited tumor content and fine needle aspirate specimens were not acceptable. Specimens from bone lesions were typically unacceptable unless there was a significant soft tissue component. The tumor specimen submitted to establish PD-L1 status should be of sufficient quantity to allow for PD-L1 IHC analyses and was preferred in FFPE blocks.

Exclusion criteria

Exclusion Criteria:

  • Prior acquiring tumor tissue samples exposure to immune-mediated therapy (including Bacillus Calmette Guerin), including but not limited to, any , anti-PD-1, anti-PD-L1, or anti PD L2 antibodies, therapeutic anticancer vaccines.
  • Any concurrent chemotherapy, product, or biologic therapy for cancer treatment. Note: Local treatment of isolated lesions, excluding target lesions, for palliative intent was acceptable (eg, local surgery or radiotherapy).
Terms in these criteria, in plain language(6)

Underlined terms in the criteria open these too. Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.

Informed consent

Before you join, the study team explains what taking part involves — its purpose, what happens, the risks and possible benefits — and answers your questions, so you can decide freely. Consent is usually recorded on a form (the informed consent form, ICF) signed by you or, where the law allows, by someone legally authorised to decide for you.

You can keep asking questions during the study, you are told of new information that matters, and you can choose to leave at any time.

Histologically or cytologically confirmed

The diagnosis was confirmed by looking at a sample under a microscope: tissue from a biopsy or surgery (histology), or cells from a fluid or needle sample (cytology).

Your pathology report is the document that shows this.

Investigational drug or device

A drug or device being studied in a clinical trial.

It may be new, or already approved and being studied for another use, dose or form. Criteria often leave out people who took part in another study of one within a recent period, commonly 30 days or five half-lives.

PD-1, PD-L1 and checkpoint inhibitors

PD-1, PD-L1 and CTLA-4 are proteins that act as brakes on the immune system. Checkpoint inhibitors, such as pembrolizumab or nivolumab, block them so the immune system can attack a cancer.

PD-L1 can also be measured in a tumour sample. Some scores count stained tumour cells only (TPS); others also count certain immune cells (CPS). The study names the score and the minimum it uses.

Biopsy and archival tissue

A biopsy takes a small piece of tissue to examine. “Archival tissue” is a sample already taken, for example at diagnosis, and kept by the hospital.

Whether a stored sample will do depends on when it was taken, how much there is and what the study needs. Ask whether the study accepts your stored sample or needs a new biopsy.

Metastases

Cancer that has spread from where it began to other parts of the body. “Metastatic” cancer is cancer that has spread this way.

05

Study design

Observational model
Cohort
Time perspective
Prospective
Enrollment
248 participants (actual)
Patient registry
No
Biospecimen retention
Samples without dna
06

What researchers measure

Primary outcomes

  1. the prevalence of High PD-L1 expression in the MIUBC patients

    Tumor tissue will be collected from all eligible patients who sign the ICF. Samples will be tested for PD-L1 expression status.

    Time frame: Tumor tissue samples should be acquired within 60 days before the enrollment and available for testing.

Secondary outcomes

  1. Proportion of patients with different PD-L1 expression level

    Proportion of patients with different PD-L1 expression level

    Time frame: Tumor tissue samples should be acquired within 60 days before the enrollment and available for testing.

  2. PD-L1 testing concordance between central lab and hospital labs

    PD-L1 testing concordance between central lab and hospital labs

    Time frame: Tumor tissue samples should be acquired within 60 days before the enrollment and available for testing.

  3. Distribution percent of different treatment approaches

    Distribution percent of different treatment approaches

    Time frame: enrollment visit

  4. 2-year OS

    follow up for OS up to 2 years from the baseline

    Time frame: From enrollment to OS, up to 2 years

Other outcomes

  1. The prevalence of PD-L1 expression by subgroups

    The prevalence of PD-L1 expression by subgroups according to age, gender, primary tumor site, metastatic disease, at baseline, and prior tobacco use, etc

    Time frame: enrollment visit

  2. OS by subgroups

    OS by subgroups according to age, gender, primary tumor site, metastatic disease at baseline and the PD-L1 expression of high and low/negative as well as other biomarkers, etc. Simple correlation coefficients among biomarkers including PD-L1 with TMB, PD-L1 with CD8+ T cell, PD-L1+ IC with CD8+ T cell.

    Time frame: from enrollment to OS, up to 2 years

  3. Simple correlation coefficients among biomarkers

    Simple correlation coefficients among biomarkers including PD-L1 with TMB, PD-L1 with CD8+ T cell, PD-L1 positive IC with CD8+ T cell.

    Time frame: enrollment visit

07

Study locations

17 sites
  • Research Site
    Beijing, 100034, China
  • Research Site
    Beijing, 100730, China
  • Research Site
    Changchun, 130021, China
  • Research Site
    Changsha, 410013, China
  • Research Site
    Chengdu, 610041, China
  • Research Site
    Guangzhou, 510060, China
  • Research Site
    Guangzhou, 510120, China
  • Research Site
    Hangzhou, 310014, China
  • Research Site
    Jinan, 250012, China
  • Research Site
    Meizhou, China
  • Research Site
    Nanjing, 2100008, China
  • Research Site
    Shanghai, 200032, China
  • Research Site
    Shanghai, 200072, China
  • Research Site
    Shenyang, 110001, China
  • Research Site
    Wuhan, CN-430030, China
  • Research Site
    Xiamen, 361003, China
  • Research Site
    Zhengzhou, 450052, China
08

References and documents

Individual participant data

Plan to share: No — Chinese Laws and Regulations don't allow

09

Timeline

Tracking since Sep 25, 2026
ElapsedEstimatedEstimated, not yet reachedSimilar studies: half by the dot; the band is the middle halfHalf of similar studies reached it by the dot; the band is the middle half, from a quarter to three quarters

Ran from May 2020 to primary completion in Mar 2023, 34 months.

Of 203 observational studies under Urinary Bladder Neoplasms, half reached primary completion within 58 months of starting (the median), counting those still running; a quarter within 33. This study's 34 months is below that.

How these figures are worked out, and which studies are left out of them.

Registered
Feb 9, 2018
First posted
Feb 15, 2018
StartActual
May 18, 2020
Primary completionActual
Mar 27, 2023
CompletionActual
Mar 27, 2023
Last update
Mar 27, 2024
What these dates mean
Start.
When the first participant enrolled; while estimated, when the study expects to open to recruitment.
Primary completion.
When the last participant was examined or treated to collect data for the study's main question, its primary outcome. A study that stopped early gives the date its data collection stopped.
Completion.
When the last participant's last visit took place, for every outcome, secondary ones and side effects included: the end of the study. Often later than primary completion, sometimes the same day.
Actual and Est.
Actual means the registry says the date has happened. Est. (estimated) is a date the sponsor plans or expects. It can still move, and the sponsor is expected to change it to actual once it has passed.
No changes since tracking began. The registry record was last updated on Mar 27, 2024, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
10

Registry details

Key details

Study ID
NCT03433924
Lead sponsor
AstraZeneca
Responsible party
Sponsor
First posted
Feb 15, 2018
Start date
May 18, 2020
Primary completion
Mar 27, 2023
Completion
Mar 27, 2023
Last update
Mar 27, 2024

Study contacts

Liqun ZHOU, doctor
principal investigator · Peking University First Hospital

Oversight

Data monitoring committee
No
FDA-regulated drug
No
FDA-regulated device
No
View the source record on ClinicalTrials.gov ↗

Not currently enrolling

This study is completed, as verified in Mar 2024. You cannot join it, but the record below documents what was studied.

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