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Application of adipose-derived mesenchymal stem cell exosome in preparation of medicines for obesity treatment

A fat-derived, stem cell technology, applied in the field of biomedicine

Inactive Publication Date: 2017-06-23
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The current research on adipose-derived mesenchymal stem cells mainly involves the use in kidney and fundus diseases (CN102048756A), the use in the treatment of erectile dysfunction (CN105902568A), the use in the preparation of liver fibrosis treatment preparations (CN103436555A), in the preparation of The use of preparations for the treatment of osteoarthritis (CN105748519A), the use in the preparation of chemotherapy sensitization preparations for liver cancer (CN103451152A), etc., but so far there have been no reports about adipose-derived mesenchymal stem cells and their exosomes in the treatment of obesity

Method used

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  • Application of adipose-derived mesenchymal stem cell exosome in preparation of medicines for obesity treatment
  • Application of adipose-derived mesenchymal stem cell exosome in preparation of medicines for obesity treatment
  • Application of adipose-derived mesenchymal stem cell exosome in preparation of medicines for obesity treatment

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] Embodiment 1: the extraction and separation of ADSC

[0045] (1) Isolation of adipose tissue: select 10-12 weeks old C57BL / 6 male mice, kill the mice by neck dislocation, open the abdominal cavity, peel off the fat in the epididymis, remove the blood vessels as much as possible, weigh the weight of the fat, and immerse it in PBS on ice placed on.

[0046] (2) Preparation of digestive juice: According to the weight of fat, 3ml of KRB buffer solution and 6mg of type Ⅰ collagenase are required for each gram of fat.

[0047](3) Digestion of adipose tissue: Cut the stripped adipose tissue mechanically, add it to the prepared digestive solution, mix well, place it in a shaker at 37°C for 45 minutes, centrifuge at 2000rpm for 5 minutes, carefully remove the cells at the bottom and place Place on ice in KRB without enzyme.

[0048] (4) Filtration: filter the cell suspension with a copper mesh with a pore size of 100 μm, centrifuge the filtered suspension at 2000 rpm for 5 min...

Embodiment 2

[0052] Example 2: Extraction and identification of ADSC-derived exosomes

[0053] ADSCs were cultured with exosome-free 10% fetal bovine serum DMEM medium (containing bFGF). Take the fourth-generation ADSC cell culture supernatant, filter it with a 0.22μm sterile filter, centrifuge at 5000g in a 100K concentrated centrifuge tube at 4°C for 30 minutes, take the concentrated solution from the upper chamber into a new sterile 15ml centrifuge tube, and add Exoquick-TCTM For the exosome extraction reagent, place at 4°C overnight, centrifuge at 5000g, 4°C for 30 minutes, discard the supernatant, resuspend the pellet with sterile PBS and aliquot, freeze at -80°C for storage.

[0054] The size and shape of the extracted exosomes were detected by transmission electron microscopy, and the results were as follows: figure 1 Shown; Exosome markers TSG101, CD9, CD63, HSP90 were detected by western-blot method, and further identified, the results are as follows figure 2 shown.

Embodiment 3

[0055] Example 3: Effect of ADSC-derived exosomes on diet-induced high-fat obesity model

[0056] (1) Establishment of diet-induced hyperlipidemia model and exosome intervention

[0057] Seven-week-old C57BL / 6 male mice were used to establish obesity models. After a week of pre-high-fat diet adaptation, they were fed a high-fat diet (HFD) (containing 60% cal), and fed a normal diet (NCD) as a control group. After 12-20 weeks of high fat, the exosomes prepared in Example 2 were injected intraperitoneally (30 μg / mouse, injected once every 3 days, and continuously injected for 6-8 weeks), which was the HFD-exosome group; the intraperitoneal injection of normal saline group was The control group, namely HFD-NS. NCD-NS was observed in mice fed normal diet and injected with normal saline intraperitoneally.

[0058] (2) Detection of body weight changes in mice

[0059] During the period of high-fat feeding and exosome intervention, the body weight of the mice was detected every w...

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Abstract

The invention discloses an application of an adipose-derived mesenchymal stem cell exosome in preparation of medicines for obesity treatment. The adipose-derived mesenchymal stem cell exosome is prepared by a method comprising the following steps of (1) dispersing stripped adipose tissue in a digestive juice to generate a cell suspension solution; (2) centrifuging the cell suspension solution to form cell sediments, separating the sediments and washing to obtain a blood vessel matrix component containing adipose-derived mesenchymal stem cells; and (3) carrying out multiplication culture on ADSC in an in vitro culture system, collecting and concentrating supernate after multiplication culture, adding an exosome extraction reagent to the concentrated supernate to obtain the adipose-derived mesenchymal stem cell exosome. The adipose-derived mesenchymal stem cell exosome is capable of promoting white fat beige to achieve heat production-driven energy consumption, thereby resisting occurrence and development of obesity.

Description

technical field [0001] The invention relates to the technical field of biomedicine, in particular to the application of exosomes from adipose-derived mesenchymal stem cells in the preparation of drugs for treating obesity. Background technique [0002] Obesity refers to a chronic disease caused by excessive accumulation of fat in the body due to excess energy. Obesity can be divided into simple obesity and secondary obesity. Obesity in the usual sense refers to simple obesity, which is mainly caused by excessive accumulation of excess energy in the form of fat in the body due to energy intake exceeding consumption. Secondary obesity is accompanied by certain diseases, such as pituitary obesity. Currently, body mass index (BMI) is used as the criterion for judging obesity. BMI ≥ 25 is considered overweight, and ≥ 30 is considered obese. In recent years, due to changes in diet structure and lifestyle, the incidence of obesity has risen sharply in both developed and developin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61K35/28A61P3/04C12N5/0775
CPCA61K35/28C12N5/0667C12N2501/115
Inventor 王群赵汇张利宁郭春朱法良潘真真
Owner SHANDONG UNIV
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