WO2000037607A2 - Methode de production d'adipocytes a partir de fibroblastes non differencies ainsi que l'utilisation des adipocytes ainsi obtenus - Google Patents
Methode de production d'adipocytes a partir de fibroblastes non differencies ainsi que l'utilisation des adipocytes ainsi obtenus Download PDFInfo
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- WO2000037607A2 WO2000037607A2 PCT/FR1999/003174 FR9903174W WO0037607A2 WO 2000037607 A2 WO2000037607 A2 WO 2000037607A2 FR 9903174 W FR9903174 W FR 9903174W WO 0037607 A2 WO0037607 A2 WO 0037607A2
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- C12N—MICROORGANISMS OR ENZYMES; COMPOSITIONS THEREOF; PROPAGATING, PRESERVING, OR MAINTAINING MICROORGANISMS; MUTATION OR GENETIC ENGINEERING; CULTURE MEDIA
- C12N5/00—Undifferentiated human, animal or plant cells, e.g. cell lines; Tissues; Cultivation or maintenance thereof; Culture media therefor
- C12N5/06—Animal cells or tissues; Human cells or tissues
- C12N5/0602—Vertebrate cells
- C12N5/0652—Cells of skeletal and connective tissues; Mesenchyme
- C12N5/0653—Adipocytes; Adipose tissue
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- C12N2500/00—Specific components of cell culture medium
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- C12N2501/00—Active agents used in cell culture processes, e.g. differentation
- C12N2501/01—Modulators of cAMP or cGMP, e.g. non-hydrolysable analogs, phosphodiesterase inhibitors, cholera toxin
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- C12N2501/00—Active agents used in cell culture processes, e.g. differentation
- C12N2501/30—Hormones
- C12N2501/33—Insulin
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- C12N2501/00—Active agents used in cell culture processes, e.g. differentation
- C12N2501/30—Hormones
- C12N2501/38—Hormones with nuclear receptors
- C12N2501/39—Steroid hormones
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- C12N2501/00—Active agents used in cell culture processes, e.g. differentation
- C12N2501/30—Hormones
- C12N2501/38—Hormones with nuclear receptors
- C12N2501/395—Thyroid hormones
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- C12N2501/00—Active agents used in cell culture processes, e.g. differentation
- C12N2501/80—Neurotransmitters; Neurohormones
- C12N2501/81—Adrenaline
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- C12N2501/00—Active agents used in cell culture processes, e.g. differentation
- C12N2501/999—Small molecules not provided for elsewhere
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- C12N2510/00—Genetically modified cells
Definitions
- the present invention relates to a production method
- adipocytes from undifferentiated fibroblasts as well as the use of the adipocytes thus obtained to screen molecules intended for the treatment of obesity, diabetes as well as hyperlipiderms and as a model for studying the mechanisms of the biology of adipocytes
- Obesity is a chronic disease with significant health consequences and the frequency of which is increasing worldwide (Hill O et al (1998), Science. 280, 1371-1374) Because obesity results from an imbalance in the energy balance and that adipocytes are considered as the main site for energy storage and mobilization, numerous studies have been carried out to understand the biology of adipocytes 15 Thus primary cultures of preadipocytes similar to fibroblasts can be differentiated in vitro into mature adipocytes which produce lipid droplets
- mice 3T3-L1 (Green H et al (1974), Cell, 1, 1 13-1 16) and 3T3- F442A (Green H et al. (1976), Cell, 7, 105-1 13) and the human brown preadipocyte cell lines
- the differentiation of adipocytes is carried out by adding to confluent preadipocytes, mixtures of different agents which stimulate differentiation, such as for example insulin, pioghtazone, dexamethasone and 3- ⁇ sobutyl -l-methyl-xanthme (Cornelius P. et al.,
- PPAR ⁇ lipase sensitive hormone
- the ⁇ 3 type adrenergic receptor ( ⁇ 3 AR) is a receptor coupled to G proteins which is expressed mainly in adipose tissue (Strosberg AD et al (1996), Prends Pharmacol Sci, 17, 373-381) This receptor is not expressed in preadipocytes but appears in white or brown mature adipocytes.
- ⁇ 3 AR ⁇ 3 type adrenergic receptor
- cAMP intracellular cyclic AMP
- PKA protein kinase A
- ⁇ 3 AR could be involved in the regulation of the proliferation / differentiation of adipocytes, in particular in brown adipose tissue (BAT).
- adipocytes from undifferentiated fibroblasts stably exp ⁇ ming human ⁇ 3 AR and using these adipocytes as a model for studying the mechanisms of biology adipocytes and as a means of screening for specific molecules of ⁇ 3 AR intended for the treatment of obesity, diabetes as well as hyper-epidemics
- the present invention relates to a method for producing adipocytes from undifferentiated fibroblasts, said method being characterized by the cultivation of undifferentiated fibroblasts ar ⁇ vés at confluence and stably expressing human ⁇ 3 AR, in a medium comprising agents stimulating the differentiation of adipocytes such as biotin, panthothenate, trnodothyronine, insulin, dexamethasone. 3- ⁇ sobutyl-1-methyl-xanthine and piog tazone or one of its derivatives.
- the undifferentiated fibroblasts can be CHO / Kl - ⁇ 3 cells and mutated CHO / Kl- ⁇ 3W64R cells. Indeed the density of ⁇ 3-AR in CHO / Kl - ⁇ 3 cells is close to that observed in the cell line
- CHO / Kl cells which express the natural W64R polymorphism of human ⁇ 3 AR, which has been correlated with pathological obesity, show a greater accumulation of lipids compared to CHO / Kl cells expressing the wild type of ⁇ 3 AR.
- the present invention also relates to a model for studying the mechanisms of the biology of adipocytes, characterized in that it comprises adipocytes obtained by the method according to the invention.
- the present invention also relates to the use of the adipocytes thus obtained to wire molecules intended for the treatment of obesity, diabetes as well as hyper-epidemics.
- the invention relates to the use of the adipocytes thus obtained to screen for antilipidic agents.
- Other characteristics and advantages of the invention appear in the following description and examples illustrated by the figures in which:
- FIG. 1 shows the stimulation of lipid accumulation in CHO / Kl cells exp ⁇ mant human ⁇ 3 AR; CHO / K1 cells expressing the wild type of confluent ⁇ 3 AR are cultured in a medium containing agents stimulating the differentiation of adipocytes (see example 1).
- FIG. 2 shows the accumulation of lipids (triglycerides) in CHO / Kl cells transfected either by human ⁇ 3 AR or by the mutated form of this receptor; wild type CHO / Kl cells (control, white), CHO / Kl cells stably transfected with human wild type ⁇ 3 AR ( ⁇ 3, black), CHO / Kl cells stably transfected with ⁇ 3 AR mutated type human ( ⁇ 3W64R, hatched) and CHO / K1 cells transfected stably with human ⁇ 2 AR ( ⁇ 2, gray) are cultured in the presence of differentiating agents; the lipids are marked with a solution of OU Red O., extracted and quantified (see example 1-3). The results are expressed as the mean ⁇ standard error to the mean (wk) of 3 to 7 experiments carried out in duplicate, * p ⁇ 0.05 (t-test),
- FIG. 3 represents the accumulation of lipids (triglycerides) in CHO / Kl cells transfected either by human ⁇ 3 .AR (A), or by the mutated form of this receptor (B) in the presence of ⁇ 3 AR agonist ;
- A CHO / K1 cells transfected stably by human wild-type ⁇ 3 AR are cultured in the presence of differentiating agents either in the absence of ⁇ 3 AR agonist (white), or in the presence of noradrenalinelO ⁇ M (NEPI , black), or in the presence of CGP12177A 10 ⁇ M selective agonist ⁇ 3 AR (CGP12, hatched). The transformation of the cells is followed as indicated in the examples.
- results are expressed as a percentage of the control value observed in CHO / K1 cells transfected stably with human wild-type ⁇ 3 AR cultured in the presence of differentiating agents in the absence of ⁇ 3 AR agonist.
- the data are expressed as the mean ⁇ standard error to the mean (wk) of 3 to 5 experiments carried out in duplicate. (B).
- CHO / Kl cells stably transfected with human ⁇ 3 AR of mutated type W64R are cultured in the presence of differentiating agents, either in the absence of ⁇ 3 AR agonist (white), or in the presence of noradrenalinelO ⁇ M (NEPI, black), or in the presence of CGP12177A 10 ⁇ M selective agonist ⁇ 3 AR, (CGP12, hatched).
- the transformation of the cells is followed as indicated in the examples.
- the results are expressed as a percentage of the control value observed in CHO / K1 cells transfected stably by the human W64R ⁇ 3 AR cultured in the presence of differentiating agents in the absence of ⁇ 3 AR agonist.
- the data are expressed as the mean ⁇ standard error to the mean (wk) of 3 to 5 experiments carried out in duplicate. * p ⁇ 0.05 (t-test),
- FIG. 4 shows the accumulation of lipids (triglycerides) in CHO / K1 cells transfected either by human ⁇ 3 AR, or by the mutated form of this receptor in the presence of a selective antagonist of ⁇ 3 AR;
- CHO / Kl cells stably transfected with human wild type B3 AR ( ⁇ 3) or with human mutated type ⁇ 3 AR ( ⁇ 3W64R) are cultured in the presence of differentiating agents either in the absence (white) or in the presence of bupranolol 10 ⁇ M selective ⁇ 3 AR antagonist (BUPRA).
- BUPRA selective ⁇ 3 AR antagonist
- results are expressed as a percentage of the control value observed in CHO / K1 cells transfected stably with human wild-type ⁇ 3 AR cultured in the presence of differentiating agents in the absence of an antagonist ⁇ 3 AR
- the data are expressed as mean ⁇ standard error of the mean (sem) of at least 3 expé ⁇ ences performed in duplicate. * p ⁇ 0.05 (t-test),
- FIG. 5 shows the induction of adipocyte differentiation markers during the accumulation of lipids in CHO / K1 cells transfected either by human ⁇ 3 AR, or by the mutated form of this receptor; RT-PCR studies are carried out as described in Example 1 CHO / KI cells of the wild type (control). CHO / K1 cells expressing wild human ⁇ 3 AR ( ⁇ 3) or the mutated form of this receptor ( ⁇ 3W64R) are cultured in the absence (-) or in the presence (+) of the differentiation agents as indicated in the examples.
- BAT b ⁇ in adipose tissue
- WAT white adipose tissue
- HSL hpase sensitive hormone
- Example 1 Material and methods used to study the differentiation of fibroblasts into adipocytes
- the cells are cultured to confluence in a mixture (1.1) of Ham's F 12OMEM (Dubelcco s modifiai Eagles medium) supplemented with 20 mM Hepes buffer, 5% of decomplemented fetal calf serum and antibiotics.
- Ham's F 12OMEM Dubelcco s modifiai Eagles medium
- the cells When the cells have reached confluence, they are transferred to a medium supplemented with biotin (33 ⁇ M), panthotenate (18 ⁇ M), truodothyronine (T3, 1 ruVl), insulin (85 nM), dexamethasone (1 ⁇ M), 3- ⁇ sobutyl-l -methyl-xanth ⁇ ne (250 nM) and piog tazone or one of its derivatives (1 ⁇ M)
- the cells are maintained in this medium for 10 to 12 days by changing the medium every 3 days If necessary 10 ⁇ M of the following products are added to the medium (-) - noradrenahne (Sigma ;.
- lipids t ⁇ glyce ⁇ des
- lipids t ⁇ glyce ⁇ des
- curves of carbonation of t ⁇ oleine Sigma according to the method dec ⁇ te by Ramirez-Zaca ⁇ as J.L. (Ramirez-Zaca ⁇ as J L et al (1992), Histochemistry. 97, 493-497)
- Total RNA is extracted from CHO / Kl cells using the isolation agent T ⁇ zol RNA (Life Technology).
- Hamster RNA is extracted from brown mterscapular adipose tissue and white abdominal omental adipose tissue Total RNA is treated for 60 minutes at 37 ° C by
- oligonucleotides were generated relative to the sequences conserved in a significant manner.
- RNA of brown and white adipose tissue from hamsters is used as a control. 200 ng of cDNA template are denatured for 4 minutes at 94
- the exponential phase of the amplification is determined by carrying out 25-30-35-40 cycles and ii) the gene is amplified for ⁇ -actin (15-20-25 cycles) as an internal standard for the quantity and quality of cDNA.
- the primer sequences are: PPAR ⁇ : upstream primer 5'-AGA CAA CAG ACA AAT CAC CAT-
- HSL upstream primer 5'- GCT GGT GTC CTT CGG GG-3 'and downstream primer 5'- GCG GCT TAC CCT CAC GG-3' ⁇ -actin: upstream primer 5 ' -GAG ACC TTC AAC ACC CC-3' and downstream primer 5'-GTG GTG GTG AAG CTG TAG CC-3 '.
- the amplification products are visualized after electrophoresis on a 1% agarose gel with BET (Ethi ⁇ ium bromide); PPAR ⁇ 401 bp; HSL around 250 bp and ⁇ -actin around 250 bp ( Figure 5).
- EXAMPLE 2 Accumulation of lipids in CHO / K1 cells transfected with the wild form or with the mutated form of human ⁇ 3 AR.
- CHO / Kl - ⁇ 3 cells are cultured under the conditions defined above. After 5 days of culture in the medium supplemented with agents stimulating differentiation, small lipid droplets appear in the cells.
- the ⁇ -actin used as internal standard is detected in untransfected CHO / Kl cells, in CHO / Kl - ⁇ 3 cells and in CHO / Kl - ⁇ 3W64R cells cultured in the presence or not of agents stimulating differentiation.
- the results obtained which demonstrate the modulation of the expression of PPAR ⁇ by human ⁇ 3 AR confirm the importance of the role of this receptor in the biology of adipocytes and show that its expression is linked to a more advanced stage of adipogenesis. .
- the ectopic expression of human ⁇ 3 AR in CHO / Kl cells is capable of modulating the expression of PPAR ⁇ , one of the major genes for adipogenesis.
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Abstract
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Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AU16647/00A AU1664700A (en) | 1998-12-18 | 1999-12-17 | Method for producing adipocytes from non-differentiated fibroblasts and use of resulting adipocytes |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR9816006A FR2788281B1 (fr) | 1998-12-18 | 1998-12-18 | Methode de production d'adipocytes a partir de fibroblastes non differencies ainsi que l'utilisation des adipocytes ainsi obtenus |
| FR98/16006 | 1998-12-18 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| WO2000037607A2 true WO2000037607A2 (fr) | 2000-06-29 |
| WO2000037607A3 WO2000037607A3 (fr) | 2000-11-09 |
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ID=9534136
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/FR1999/003174 Ceased WO2000037607A2 (fr) | 1998-12-18 | 1999-12-17 | Methode de production d'adipocytes a partir de fibroblastes non differencies ainsi que l'utilisation des adipocytes ainsi obtenus |
Country Status (3)
| Country | Link |
|---|---|
| AU (1) | AU1664700A (fr) |
| FR (1) | FR2788281B1 (fr) |
| WO (1) | WO2000037607A2 (fr) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2000044882A3 (fr) * | 1999-01-29 | 2001-08-09 | Zen Bio Inc | Methodes et compositions de differenciation de preadipocytes humaines en adipocytes |
| EP1642965A1 (fr) * | 2004-10-01 | 2006-04-05 | Curacyte Discovery GmbH | Utilisation de fibroblastes pour la différentiation en adipocytes, ostéoblastes et chondrocytes |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5789654A (en) * | 1996-05-09 | 1998-08-04 | Beth Israel Hospital Association | Transgenic animals deficient in endogenous β3 -adrenergic receptor and uses thereof |
-
1998
- 1998-12-18 FR FR9816006A patent/FR2788281B1/fr not_active Expired - Fee Related
-
1999
- 1999-12-17 AU AU16647/00A patent/AU1664700A/en not_active Abandoned
- 1999-12-17 WO PCT/FR1999/003174 patent/WO2000037607A2/fr not_active Ceased
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2000044882A3 (fr) * | 1999-01-29 | 2001-08-09 | Zen Bio Inc | Methodes et compositions de differenciation de preadipocytes humaines en adipocytes |
| EP1642965A1 (fr) * | 2004-10-01 | 2006-04-05 | Curacyte Discovery GmbH | Utilisation de fibroblastes pour la différentiation en adipocytes, ostéoblastes et chondrocytes |
| WO2006037579A1 (fr) * | 2004-10-01 | 2006-04-13 | Curacyte Discovery Gmbh | Utilisation de fibroblastes pour la differenciation dans des cellules adipeuses, des cellules osseuses et des cellules cartilagineuses |
Also Published As
| Publication number | Publication date |
|---|---|
| FR2788281B1 (fr) | 2001-03-09 |
| WO2000037607A3 (fr) | 2000-11-09 |
| AU1664700A (en) | 2000-07-12 |
| FR2788281A1 (fr) | 2000-07-13 |
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