ClinicalTrials.gg
Status unknownNCT05371197Updated May 12, 2022

Envafolimab as Neoadjuvant Immuntherapy in Resectable Local Advanced dMMR/MSI-H Colorectal Cancer

A Phase 2 interventional study of Neoadjuvant therapy with PD-L1 inhibitor in Colorectal Cancer, Mismatch Repair-deficient (dMMR) and Microsatellite Instability-high (MSI-H), sponsored by Third Affiliated Hospital, Sun Yat-Sen University. Status unknown at 1 site in China. Open to participants aged 18 Years to 70 Years. Per ClinicalTrials.gov, last updated 2022-05-12.

Sponsored by Third Affiliated Hospital, Sun Yat-Sen University · Phase 2, Interventional, and Treatment

The sponsor has not verified this record recently (last verified May 2022), so the status shown — last known as Recruiting — may be out of date.
Phase
Phase 2
Study type
Interventional
Enrollment
26
Allocation
Not applicable
Ages
18 Years to 70 Years
Sex
All
01

Where this study stands

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

Among 376 studies testing Immune checkpoint inhibitors in Colorectal Neoplasms — 158 open to participants now, 210 under way, 24 of them phase 3. A drug class: Immune checkpoint inhibitors · Colorectal Neoplasms.

Planned enrollment
287th of 376
26 · median 48
Started
2022
with 30 others
Phase 2
217 of 376
99 open now
Registered
171st of 376
by date

Among the 376 studies testing Immune checkpoint inhibitors in Colorectal Neoplasms, this one is the 287th largest by planned enrollment, is one of 31 that started in 2022, is one of 217 in phase 2, and was the 171st registered.

Colorectal Neoplasms

6,544 studies on the registry are indexed under Colorectal Neoplasms; 1,666 are open to participants now.

Browse Colorectal Neoplasms studies →

Open to participants now

158 of the 376 studies testing Immune checkpoint inhibitors in Colorectal Neoplasms are open now, in 12 countries. Recruiting first, the newest first:

153 more — sign in →

By country, each count listing its studies:

All 158 open studies →

About Immune checkpoint inhibitors

A class of medicines: which ones, and the studies of each, are on its page →

Who these studies take

Of the 1,184 Colorectal Neoplasms studies recruiting now, 767 (65%) set no upper age limit and 264 (22%) stop at 75 or younger; 48 take children under 18; 124 take healthy volunteers.

This study: 18 Years to 70 Years · all sexes · no healthy volunteers.

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02

Study summary

Colorectal cancer (CRC) is one of the most common malignant tumours of human beings. Mismatch Repair-deficient (dMMR)/ Microsatellite Instability-high (MSI-H) CRC is a specific subtype of CRC, which accounts for approximately 15% of all CRC patients, and can not benefit from 5-fluorouracil (5-FU) adjuvant chemotherapy. Once patients have distant metastases, they are not sensitive to traditional palliative chemotherapy, and thus lead to much worse prognosis than that of mismatch repair-proficient (pMMR)/ microsatellite stability (MSS). A phase II clinical study of anti-PD-1 immunotherapy based on mismatch repair (MMR) status published in "N Engl J Med" showed that the objective response rate (ORR) of advanced colorectal cancer patients with dMMR received anti-PD-1 is 40%, and a longer response time can be obtained compared to conventional chemotherapy. Another study (ClinicalTrials.gov, NCT03926338) which investigating the effect of neoadjuvant PD-1 blockade with toripalimab, with or without celecoxib, on mismatch repair-deficient or microsatellite instability-high, locally advanced, colorectal cancer. The result revealed that all 34 patients had an R0 resection. 15 of 17 patients (88%) in the toripalimab plus celecoxib group and 11 of 17 patients (65%) in the toripalimab monotherapy group had a pathological complete response.

In theory, anti-PD-L1 drugs should have fewer immune side-effects than anti-PD-1 drugs. However, there are no reports of anti-PD-L1 neoadjuvant therapy for the dMMR/MSI-H colorectal cancer. Therefore, the aim of this study was to investigate the efficacy and safety of anti-PD-L1 monoclonal antibody (Envafolimab) as neoadjuvant immuntherapy for resectable local advanced colorectal cancer patient with the dMMR/MSI-H.

03

Conditions studied

  • Colorectal Cancer
  • Mismatch Repair-deficient (dMMR)
  • Microsatellite Instability-high (MSI-H)
  • Neoadjuvant Therapy
04

Who can participate

Ages eligible
18 Years to 70 Years
Sexes eligible
All
Accepts healthy volunteers
No

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

  1. Willing and able to provide written .
  2. Histological or cytological documentation of adenocarcinoma of the colon or rectum.
  3. Tumor tissues were identified as mismatch repair-deficient (dMMR) by immunohistochemistry (IHC) method or microsatellite instability-high (MSI-H) by polymerase chain reaction (PCR).
  4. Male or female subjects > 18 years \< 70 of age.
  5. (ECOG) performance status of 0 or 1.
  6. Determined CT or MRI scans (done within 14 days of registration) of the chest, abdomen and pelvis: locally advanced (cT3-4 or cN1-2 [with the definition of a clinically positive lymph node being any node ≥ 1.0 cm]).
  7. Non complicated primary tumor (obstruction, perforation, bleeding).
  8. No previous any systemic anticancer therapy for colorectal cancer disease or radiologic evaluation of tumor regression \< 20% or unacceptable toxic effects during chemotherapy.
  9. Adequate bone marrow, hepatic and renal function as assessed by the following laboratory requirements conducted within 7 days of starting study treatment.

Exclusion criteria

Exclusion Criteria:

  1. Previous or concurrent cancer that is distinct in primary site or histology from colon cancer within 5 years prior to randomization.
  2. Significant cardiovascular disease including unstable angina or myocardial infarction within 6 months before initiating study treatment.
  3. Heart failure grade III/IV (-classification).
  4. Unresolved toxicity higher than v.4.0 Grade 1 attributed to any prior therapy/procedure.
  5. Subjects with known allergy to the study drugs or to any of its .
  6. Current or recent (within 4 weeks prior to starting study treatment) treatment of another drug or participation in another investigational study.
  7. Breast- feeding or pregnant women
  8. Lack of effective .
  9. Previously received anti-programmed death-1 () or its ligand (PD-L1) antibody, anti-cytotoxic T lymphocyte-associated antigen 4 (cytotoxic T-lymphocyte-associated Protein 4, CTLA-4) antibody or other drug/antibody that acts on T cell costimulation or checkpoint pathways.
  10. With any distant .
Terms in these criteria, in plain language(10)

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.

ECOG performance status

A scale of how much an illness limits everyday activity. For people being assessed to join a study, scores run from 0 (fully active) to 4; lower is more active.

0
Fully active, no restrictions.
1
Limited in strenuous activity, but walking and able to do light work, such as housework or office work.
2
Walking and able to look after yourself, but unable to work; up and about more than half of waking hours.
3
Able to look after yourself only in part; in bed or a chair more than half of waking hours.
4
Unable to look after yourself at all; in bed or a chair all day.

Studies most often ask for 0–1 or 0–2. Your doctor gives the score; the WHO scale uses the same steps. The full scale also has 5, which records death.

Adjuvant and neoadjuvant

Neoadjuvant treatment is given before the main treatment (usually surgery), often to shrink a tumour. Adjuvant treatment is given after it, to lower the chance of the cancer coming back.

NYHA class (heart failure)

The New York Heart Association’s four classes of how much heart failure limits physical activity.

I
No limits: ordinary activity causes no undue tiredness or breathlessness.
II
Slight limits: comfortable at rest, ordinary activity causes symptoms.
III
Marked limits: comfortable at rest, less than ordinary activity causes symptoms.
IV
Symptoms even at rest; any activity makes them worse.

Studies set their own limit — many outside heart failure leave out class III–IV, while heart failure studies may ask for a particular class. Check the class this study names.

CTCAE grade

The US National Cancer Institute’s scale of how severe an adverse event is — any unwanted medical event during a study, such as a symptom, an illness or an abnormal test result, whether or not a treatment caused it. Whether it did is judged separately.

1
Mild.
2
Moderate.
3
Severe.
4
Life-threatening.
5
Death due to the event.

“Side effects of earlier treatment resolved to grade 1 or less” means they have settled to mild or gone.

Excipients

The other ingredients in a medicine besides the active drug, such as fillers, colours or preservatives.

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.

Contraception

Ways of preventing pregnancy. “Highly effective” methods fail less than 1% of the time a year when used correctly — for example an IUD or an implant.

Criteria usually say which methods count and how long to keep using them after the last dose, sometimes for male participants too. Some studies accept a partner’s vasectomy if it was confirmed successful and that person is the participant’s only sexual partner.

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.

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

Phase
Phase 2
Primary purpose
Treatment
Allocation
Not applicable
Intervention model
Single group
Masking
None (open label)
Enrollment
26 participants (estimated)

Study arms

  • Experimental
    PD-L1 inhibitor

    Neoadjuvant therapy with PD-L1 inhibitor (Envafolimab)

    Drug: Neoadjuvant therapy with PD-L1 inhibitor

Interventions

  • DrugNeoadjuvant therapy with PD-L1 inhibitor

    Drug page: Immune checkpoint inhibitors

    Neoadjuvant therapy with PD-L1 inhibitor (Envafolimab), 300mg, Q3W for 4 cycles

06

What researchers measure

Primary outcomes

  1. Pathological complete response (pCR) rates

    Proportion of patients experiencing a pCR to perioperative PD-L1 antibody

    Time frame: 1 year

Secondary outcomes

  1. Major pathological response rates

    The proportion of patients experiencing a major pathological response to perioperative PD-L1 antibody

    Time frame: 1 year

  2. R0 resection rates

    The proportion of patients experiencing a R0 resection after perioperative treatment with PD-L1 antibody

    Time frame: 1 year

  3. Disease-free survival (DFS)

    Defined as the time from randomization to relapse, metastasis or death from any cause

    Time frame: 3 years

  4. Overall survival (OS)

    Defined as the time from randomization to death from any cause

    Time frame: 5 years

  5. Drug Safety

    Assessed by evaluation of treatment-related adverse events

    Time frame: 1 year

  6. Drug feasibility

    Any treatment-related delays in the planned surgery of no more than 28 days after the last preoperative toripalimab dose

    Time frame: 1 year

07

Study locations

1 of 1 sites recruiting
  • the Third Affiliated Hospital of Sun Yat-Sen University
    Guangzhou, Guangdong 510630, China
    Recruiting
    • Jiafeng Fang, M.D. & Ph.D. · Contactfangjf@mail.sysu.edu.cn · +8613760660785
    • Jiafeng Fang, M.D. & Ph.D. · Principal investigator
08

References and documents

Individual participant data

Plan to share: Undecided

No publications or documents are linked to this record.

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

Started May 2022 (actual). Primary completion is estimated for Jun 2024, 25 months after the start.

Of 498 non-industry phase 2 interventional studies under Colorectal Neoplasms, half reached primary completion within 55 months of starting (the median), counting those still running; a quarter within 33 and three quarters within 75. This study's planned 25 months is below that.

Counting every sponsor, half of 618 studies reached it within 49 months; a quarter within 31 and three quarters within 75.

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

Registered
Nov 29, 2021
First posted
May 12, 2022
StartActual
May 5, 2022
Primary completionEst.
Jun 30, 2024
CompletionEst.
Dec 31, 2024
Last update
May 12, 2022
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 May 12, 2022, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
10

Registry details

Key details

Study ID
NCT05371197
Responsible party
Hongbo Wei (Vice-president of Third Affiliated Hospital, Sun Yat-Sen University, Third Affiliated Hospital, Sun Yat-Sen University) — Principal investigator
First posted
May 12, 2022
Start date
May 5, 2022
Primary completion
Jun 30, 2024 (estimated)
Completion
Dec 31, 2024 (estimated)
Last update
May 12, 2022

Oversight

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

Not currently enrolling

This study is status unknown, as verified in May 2022. You cannot join it, but the record below documents what was studied.

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Studies of the drug tested here: Immune checkpoint inhibitors

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