System and method of collecting and infusing an apoptotic white blood cell component and a transplant component

Patent metadata

Field	Value
Publication number	US-11679193-B2
Application number	US-201816226452-A
Country	US
Kind code	B2
Filing date	Dec 19, 2018
Priority date	Dec 20, 2017
Publication date	Jun 20, 2023
Grant date	Jun 20, 2023

Abstract

A method for prophylaxis or treatment of a graft's rejection of a recipient, driven and adjusted by a microprocessor-based controller. Provided is a fluid circuit comprising a first container configured to receive a transplant component and a second container configured to receive an apoptotic component. Provided is a separator configured to associate with the fluid circuit and separate whole blood into a red blood cell component, a plasma component, and a white blood cell component. Whole blood is directed into the fluid circuit and the separator. The whole blood is separated into the red blood cell component, the plasma component, and the white blood cell component. A first portion comprising the transplant component of the white blood cell component is directed to the first container. A second portion of the white blood cell component is directed to the second container and the second portion is rendered apoptotic.

First claim

The invention claimed is:

1. A method for prophylaxis or treatment of a graft's rejection of a recipient, at least partially driven and adjusted by a microprocessor-based controller, comprising the steps of:
mounting a disposable fluid circuit comprising a first product container and a second product container onto a separator configured to associate with said disposable fluid circuit, the separator comprising a chamber configured to rotate about a rotational axis and convey whole blood into an inlet region of the chamber for separation into a red blood cell component, a plasma component, and a white blood cell component;
directing whole blood from a blood source into the disposable fluid circuit and the chamber;
separating the whole blood into the red blood cell component, the plasma component, and the white blood cell component;
directing a first portion comprising a transplant component of the white blood cell component to the first product container;
directing a second portion of the white blood cell component to the second product container and rendering the second portion apoptotic;
connecting a recipient to the first product container and the second product container;
infusing the transplant component from the first product container to the recipient; and
infusing the apoptotic second portion of the white blood cell component from the second product container to the recipient as late as 3 days prior to infusing the transplant component from the first product container to the recipient or as early as 10 days after infusing the transplant component from the first product container to the recipient.

2. The method of claim 1 , wherein rendering the second portion apoptotic comprises at least one of:
1) mixing a photoactivation agent to the second portion of the white blood cell component and irradiating a mixture comprising the photoactivation agent and the second portion of the white blood cell component; and
2) applying heat and/or cool shocks to the second portion.

3. The method of claim 1 , further comprising rendering the second portion apoptotic while separating and collecting the first portion comprising the transplant component of the white blood cell component.

4. The method of claim 1 , further comprising infusing the apoptotic second portion of the white blood cell component from the second product container to the recipient after manifestation by the recipient of GvHD symptoms.

5. The method of claim 1 , further comprising cryopreserving the transplant component and/or the apoptotic second portion prior to infusing to the recipient.

6. The method of claim 1 , further comprising:
1) returning a first portion of the red blood cell component to the blood source via a first pathway within the fluid circuit;
2) returning a second portion of the red blood cell component, a first portion of the plasma component, and/or an unseparated white blood cell component to the blood source from the chamber via a second pathway within the fluid circuit;
3) returning a third portion of the red blood cell component, a second portion of the plasma component, and/or the unseparated white blood cell component to the blood source from the chamber via a third pathway within the fluid circuit;
4) rinsing the unseparated white blood cell component with saline or plasma along a fourth pathway within the fluid circuit into the chamber; and
5) repeating steps 2 and 3.

7. The method of claim 1 , wherein the transplant component of the white blood cell component comprises stem cells, and the apoptotic second portion of the white blood cell component comprises apoptotic mononuclear cells.

Assignees

• Fenwal Inc

Inventors

• Radwanski Katherine N
• Abedin Tanima Jahan
• Wegener Christopher J

Classifications

• A61M2202/0439

  White blood cells; Leucocytes · CPC title

• A61M1/3683

  using photoactive agents · CPC title

• A61M1/3693 Primary

  using separation based on different densities of components, e.g. centrifuging · CPC title

• B04B13/00

  Control arrangements specially designed for centrifuges; Program control of centrifuges (control arrangements for feed, charge or discharge B04B11/00) · CPC title

• A61M2205/3368

  Temperature · CPC title