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Isolation of stem cells from adipose tissue by ultrasonic cavitation, and methods of use

a technology of stem cells and ultrasonic cavitation, which is applied in the direction of skeletal/connective tissue cells, drug compositions, immunological disorders, etc., can solve the problems of increasing reducing the number of isolated stem cells, and increasing the amount of cellular debris, so as to ensure the viability of stromal/stem cells

Inactive Publication Date: 2015-06-11
TAVID PTY LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The present patent aims to provide a method for treating adipose tissue with ultrasonic cavitation to break up the tissue and release stem cells. The inventors found that ultrasonic cavitation can cause the adipocytes to lyse and release a stromal vascular fraction that includes stem cells and extra cellular matrix. The inventors also maintain the temperature of the adipose tissue during ultrasonic cavitation at a level that ensures the viability of the stem cells.

Problems solved by technology

While collagenase is effective, it can be unsuitable for preparing stem cells as:enzyme treatment results in a high level of cell death, thereby reducing numbers of isolated stem cells and resulting in more cellular debris;enzymes may damage and destroy unique cell types;contamination of isolated stem cells with enzymes may make them unsuitable for transplantation; andregulatory bodies may consider that the use of enzymes in the isolation of stem cells results in a cellular product requiring drug approval.

Method used

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  • Isolation of stem cells from adipose tissue by ultrasonic cavitation, and methods of use
  • Isolation of stem cells from adipose tissue by ultrasonic cavitation, and methods of use
  • Isolation of stem cells from adipose tissue by ultrasonic cavitation, and methods of use

Examples

Experimental program
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Effect test

example 1

Preparation of Adipose Tissue by Liposuction

[0065]An excess amount of Tumescent solution (containing, in one litre of normal saline, 1 mg adrenalin, 400 mg to 800 mg lignocaine and 10 mLs of a 8.4% sodium bicarbonate solution), which exceeds the amount of liposuction to be aspirated prior to the liposuction operation, was infused into hypodermic fat layer (tumescent method), and thereafter cannulae having, for example, 2-3 mm of inner diameter (made of metal with aspirator) was used for the liposuction operation. Liposuction operations are well known in the art, and for example, can be referred to in Biyo Seikei Shujutsu Practice 2 (Cosmetic Operation Practice 2), ed. Masanari ICHIDA, Ryusaburo TANINO, and Yoshiaki HOSAKA, published by BUNKODO, pp. 429-469, which is incorporated herein by reference in its entirety.

[0066]Aspirated fat was washed with saline. About 50 ml to ten litres of washed aspirate may be generated, and the resultant adipose tissue derived cellular materials used...

example 2

Preparation of Adipose Tissue by Surgery

[0067]Fat tissue is obtained by surgery from human subjects who had given their informed consent.

[0068]Separation was conducted with techniques well known in the art. Briefly, human fat tissue was aseptically separated from fat tissue suctioned from human subjects who had given their informed consent. The resultant adipose tissue derived cellular materials are used for derivation of stromal vascular fractions.

example 3

Preparation of a Stromal Vascular Fraction Comprising Viable Stem Cells by Ultrasonic Cavitation (Ultrasonic Cavitation at Amplitude 40% and Cycle 0.5 for 1 Minute and 40 Seconds)

[0069]1) Adipose tissue derived from liposuction aspirates and 45 ml placed into a 50 ml tube.

2) Excess fluid is removed by centrifuged at 200 g / 2 minutes to separate out the excess fluid and adipose tissue. The excess fluid at the base of the tube is removed, typically leaving 40 ml of adipose tissue.

3) (Optional) The tube is placed into a chilled environment and care taken to ensure that the temperature of the tissue / cells does not fall below 2° C.

4) The ultrasonic cavitation device probe Hielschler UP200S is placed into the adipose tissue and the amplitude is set at 50%, cycle 0.5. The probe is raised and lowered for 1 minute and then for 40 seconds at two different locations in the tube (i.e., bottom and top of the tube), rested for 3 minutes and optionally the process repeated. Care is taken to prevent...

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Abstract

In one embodiment, the present invention relates to a non-enzymatic method for isolating stem cells from adipose tissue, wherein the method comprises treating adipose tissue with ultrasonic cavitation to break up the adipose tissue and lyses mature adipocytes, resulting in a stromal vascular fraction containing viable stromal / stem cells.

Description

CROSS REFERENCE TO RELATED APPLICATIONS[0001]This application claims priority from Australian Provisional Application No 2012902719 filed 26 Jun. 2012, the contents of which are incorporated herein by reference in their entirety.FIELD OF THE INVENTION[0002]The present invention relates to methods of utilizing stem cell preparations.[0003]The invention has been developed primarily for the non-enzymatic isolation of stromal / stem cells from adipose tissue and will be described hereinafter with reference to this application. However, it will be appreciated that the invention is not limited to this particular field of use.BACKGROUND OF THE INVENTION[0004]Any discussion of the prior art throughout the specification should in no way be considered as an admission that such prior art is widely known or forms part of the common general knowledge in the field.[0005]Adipose tissue, in addition to containing mature adipocytes, also contains stem cells that can be differentiated into a variety of...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): C12N13/00A61K35/35C12N5/0775
CPCC12N13/00A61K35/35C12N5/0667C12N1/066C12N2521/10A61P11/00A61P19/00A61P19/02A61P21/00A61P21/04A61P25/00A61P27/00A61P29/00A61P37/02
Inventor BRIGHT, RALPHBRIGHT, PELINHANSEN, BRUCETHOMAS, WAYNE
Owner TAVID PTY LTD
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