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Questions and answers

What is CAR-T

CAR-T is one of the newer leukemia treatments: the patient’s own immune cells are “trained” to recognise leukemia.

Last updated: ~1 min read
A T cell with a new receptor
Figure 1.A T cell with a new receptor

01Short answer

CAR-T cell therapy is made from the patient’s own T lymphocytes. T cells are collected from the blood; in the laboratory they are given a receptor (CAR) that recognises a particular protein on leukemia cells (for example CD19), multiplied and given back to the patient. In the body these cells find and destroy leukemia cells. Today it is used mainly for relapsed or resistant B-cell ALL and some lymphomas. Because serious side effects can occur, it is given only in specialised centres.

02Simple explanation

CAR-T is like giving your own T cells new “eyes”.

These “eyes” recognise leukemia cells.

03Scientific explanation

A CAR is a synthetic receptor that links an antigen-recognising part to T-cell activation signals.

The main side effects are cytokine release syndrome (CRS) and immune effector cell-associated neurotoxicity (ICANS); they are managed with specific medicines.

04What happens in the body?

How it is made

First comes leukapheresis, collecting T cells from the blood. The cells go to a manufacturing laboratory and are prepared over several weeks. “Bridging” treatment is sometimes given meanwhile.

The infusion

Short lymphodepleting chemotherapy is given first. Then the CAR-T cells are infused into a vein. Close monitoring is needed in the following weeks.

The laboratory where the cells are prepared
Figure 2.The laboratory where the cells are prepared

Who it suits

Criteria vary by country and centre. Talk with your haematologist about eligibility.

T cells against a leukemia cell
Figure 3.T cells against a leukemia cell

05The CAR-T journey

Four stages.

T cells collected — Leukapheresis.1T cells collectedLeukapheresis.
Prepared in the lab — The receptor is added.2Prepared in the labThe receptor is added.
Given back — The cells are infused.3Given backThe cells are infused.
Close monitoring — Side effects are watched for.4Close monitoringSide effects are watched for.
A new optionIt can help in some difficult cases.
SafetyMonitoring at the centre matters.

06Key points at a glance

TopicIn brief
How it is madeFirst comes leukapheresis, collecting T cells from the blood. The cells go to a manufacturing laboratory and are prepared over several weeks. “Bridging” treatment is sometimes given meanwhile.
The infusionShort lymphodepleting chemotherapy is given first. Then the CAR-T cells are infused into a vein. Close monitoring is needed in the following weeks.
Who it suitsCriteria vary by country and centre. Talk with your haematologist about eligibility.

07Key terms

T lymphocyte
The attacking cell of the immune system.
CAR
A synthetic receptor that recognises a leukemia protein.
CRS
Cytokine release syndrome, a reaction that can bring fever and low blood pressure.

08Key points

  • CAR-T is made from the patient’s own T cells.
  • It recognises a leukemia protein.
  • It is used mainly in relapsed B-ALL.
  • Close monitoring matters.

09Frequently asked questions

Is CAR-T given once?

Usually as one infusion, but preparation and monitoring take weeks.

Does CAR-T replace chemotherapy?

In some cases it is an additional option, not a replacement for everyone.

10Questions for your doctor

Take these questions to your appointment. The ones you save are collected on the “My questions” page and stay on this device only.

  1. Is CAR-T given once?

  2. Does CAR-T replace chemotherapy?

My questions

12Sources

  1. National Cancer Institute (NCI). CAR T Cells: Engineering Patients’ Immune Cells to Treat Their Cancers
  2. National Cancer Institute (NCI). Adult Acute Lymphoblastic Leukemia Treatment (PDQ®) – Patient Version
  3. National Cancer Institute (NCI). Leukemia—Patient Version
  4. MedlinePlus (U.S. National Library of Medicine). Peripherally inserted central catheter - dressing change
  5. Cancer Research UK. Coping emotionally with cancer
  6. National Cancer Institute (NCI). When Someone You Love Is Being Treated for Cancer (booklet)
  7. MedlinePlus (U.S. National Library of Medicine). Histocompatibility antigen test
  8. National Cancer Institute (NCI). Managing Your Care
  9. Anthony Nolan. Understanding stem cell transplants
  10. MedlinePlus. Complete Blood Count (CBC)
Medical disclaimerThis information is for educational purposes only and does not replace medical advice.
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