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Molecular mechanisms of vitamin D plus Bisphenol A effects on adipogenesis in human adipose-derived mesenchymal stem cells

Abstract

Background

Obesity is considered a major health concern and mounting evidence suggests that the exposure to environmental endocrine disruptors, including Bisphenol-A (BPA), may enhance the risk to develop the disease. Moreover, growing documents propose that the vitamin D may contribute to adipogenic signaling and lipid accumulation during adipocyte differentiation. We focused on the molecular mechanism of vitamin D and BPA in human adipose-derived mesenchymal stem cells (hADMSCs) which vitamin D and BPA may influence adipose tissue development and function.

Methods

Human adipose-derived mesenchymal stem cells were cultured for 14 days in lipogenic differentiation media containing continuous concentrations of vitamin D plus BPA (0.1 nM or 10 nM). The expression of adipogenic markers including the peroxisome proliferator-activated receptor γ (PPARγ), CCAAT-enhancer-binding protein α (C/EBP α) CCAAT-enhancer-binding protein β (C/EBP β), fatty acid synthase (FASN), lipoprotein lipase (LPL), sterol regulatory element-binding protein-1c (SREBP1c), insulin-induced gene-2 (INSIG2), vitamin D receptor (VDR), estrogen receptor-beta (ER-β), fatty acid-binding protein-4 (FABP4), and glucose transporter-4 (GLUT4) was measured using Quantitative polymerase chain reaction (qPCR) and enzyme-linked immunosorbent assay (ELISA). Lipid accumulation was visualized with staining with Oil Red O.

Results

In the morphological assessment of mesenchymal stem cells treated with a concentration of 10 nM vitamin D plus BPA, more lipid accumulations were observed in comparison with the group with 0.1 nM concentration. Treatment of hADMSCs with vitamin D plus BPA (0.1 nM) significantly inhibited the induction of PPARγ, C/EBP β, C/EBP α, and FASN related to adipocyte differentiation and development. However, the exposure of cells to the concentration of 10 nM vitamin D plus BPA induced the expression of these genes associated to the adipogenesis. The remarkable increase in the level of SREBP1c was associated to the suppression of INSIG2 in treated preadipocytes with 10 nM vitamin D plus BPA. Our findings showed that the expression of VDR, ERβ, GLUT4, and FABP4 were upregulated through differentiation with the highest concentrations in 0.1 nM vitamin D plus BPA group for VDR, ERβ, and GLUT4.

Conclusions

Vitamin D plus BPA at concentration of 10 nM boosted the adipogenesis during the critical stages of adipocytes development, whereas it seems to inhibit this process at concentration of 0.1 nM.

Background

Obesity is a chronic disease in which the excess adipose tissue has accumulated in the body. Fat accumulation is considerably related to cardiovascular disease, diabetes type 2, hypertension, sleep apnea, musculoskeletal disorders, psychological conditions, and a few cancers. Moreover, obesity is contributed to higher mortality and morbidity rates as well as reduced life expectancy [1, 2].

The regulation of adipose tissue expansion is a remarkable process characterized by the increase in the volume of adipocytes known as hypertrophy and the number of adipocytes known as hyperplasia called adipogenesis. These are necessary for lipid storage and development to form the mature adipocytes [3,4,5].

The expression of nuclear and membrane vitamin D receptors (VDR) in adipocytes proposes that adipose tissue is responsive to vitamin D. A range of mechanisms by which vitamin D possibly affects adipogenesis and energy balance were suggested [6, 7].

The evidence supports stimulating and suppressing actions of vitamin D on adipogenesis. In mouse models, vitamin D blunted adipogenesis through acting on various targets suppressing the expression of CCAAT-enhancer-binding protein α (C/EBPα) and peroxisome proliferator-activated receptor γ (PPARγ), downregulating the mRNA expression of CCAAT-enhancer-binding protein β (C/EBP β) and its nuclear protein levels in 3T3-L1 preadipocytes [8, 9]. In 3T3-L1 preadipocytes, vitamin D inhibits the adipogenesis by suppressing C/EBPα and PPARγ expression and down-regulating transcription of C/EBPβ and its nuclear protein. Vitamin D also activates Eight-Twenty-One factor (ETO), C/EBPβ co-receptor, which plays more inhibitory role on the C/EBPβ function. WNT/β-Catenin keeps preadipocyte cells in the undifferentiated phase which prevents adipogenesis. Vitamin D exerts the anti-adipogenic effects on 3T3-L1 cells by maintaining the expression levels of nuclear WNT10B and β-Catenin and suppressing PPARγ [9].

In human tissue, vitamin D stimulates the differentiation of subcutaneous preadipocytes by augmenting the expression of fatty acid-binding protein-4 (FABP4), and lipoprotein lipase (LPL) [10, 11]. Vitamin D enhances lipid accumulation and increases expression of adipogenic genes, including fatty acid synthase (FASN), FABP4, and PPARγ to differentiate mesenchymal cells to adipocytes [12,13,14].

The rising prevalence of obesity was preceded by an exponential growth to produce synthetic chemicals which resulted in proposing a new hypothesis called environmental obesogen [15]. Bisphenol A (BPA) is a lipophilic compound characterized as an endocrine disrupter with estrogen mimetic activity. BPA is so widespread in the daily human environment which found in products including polycarbonate plastics, the lining of canned food, beverage, and more. Therefore, it can transfer into human bodies. BPA is detected in human plasma and urine as well as in the human milk [15,16,17,18,19]. The experimental data report that BPA interferes with main weight controlling hormones such as thyroid hormones, estrogen, testosterone, glucocorticoids, and leptin. BPA acts as a potential disrupter to develop obesity by provoking lipid accumulation and differentiating preadipocytes from the mature adipocytes by expressing adipogenic genes such as C/EBP α, FABP4, PPARγ, and LPL [17, 20,21,22]. BPA in micromole concentrations induces the differentiation of adipocytes, while in nanomol concentrations, it reduces insulin sensitivity in adipose tissue. Decreased Glucose transporter-1 (GLUT-1) expression and insulin receptor phosphorylation impair glucose metabolism and increase the risk of diabetes type 2.

BPA interacts with nuclear estrogen receptors, glucocorticoids, PPARγ, retinoid X receptor (RXR), and thyroid at nuclear micromol concentrations which is all these receptors are involved in adipogenesis [17]. BPA induced adipocyte differentiation and lipid accumulation through activating these receptors [17]. We tested the effects of vitamin D plus BPA on the differentiation of human adipose derived mesenchymal stem cells (hADMSCs) to adipocytes.

Methods

Human adipose-derived stem cells

hADMSCs obtained from the human cell bank of Iranian Biological Resource Center laboratory (Tehran, Iran). Written informed consent for using and collecting the cells and tissues was obtained from all donors. Human ASC highly used in all experiments were from subcutaneous abdominal adipose tissue of female donors with an average age of 37 and body mass index (BMI) average of 26.2 kg/m2. Dulbecco’s modified Eagle medium (DMEM) supplemented with 10% FBS, and 2% glutamine, 100 IU/ml penicillin, and 100 IU/ml streptomycin were used as growth media which incubated at 37 °C with 5% humidified CO2. The cells were passed when they reached 80–90% confluence with media changed in the 2–3-day interval. Once 80–90% confluence was reached (4 passage), all wells were divided into three experimental groups with at least three parallel wells in each group: (i) 0.1 nM of vitamin D plus 0.1 nM of BPA with induction; (ii) 10 nM of vitamin D in the active metabolic form, 1,25-dihydroxyvitamin D3, plus 10 nM BPA with induction; (iii) control with induction and without vitamin D or BPA. To induce the differentiation into mature adipocytes, cells were suspended and cultured in an adipocyte differentiation medium (Gibco, UK) involving the concentrations of 0.5 mM 3-isobutyl-3-methylxanthine (IBMX), 1 mM dexamethasone, 5 mg/ml human insulin for 14 days. After a week, the media were replaced with an adipocyte maintenance medium (Gibco, UK) and cultured for 7 days. Treatment compounds were added at the same concentrations when media was changed. All these mix changes were done in parallel in control cells without vitamin D. Cells were collected and harvested to assess messenger ribonucleic acid (mRNA) adipogenic genes at hours 1, 3, and days 1, 3, 7 and 14 during the differentiation. All chemical materials were purchased from Sigma-Aldrich.

Quantitative real-time reverse transcription-PCR (qRT-PCR)

The mRNA level of adipogenesis-related genes, PPARγ, C/EBPα, C/EBPβ, LPL, FASN, sterol regulatory element-binding protein-1c (SREBP-1c), Insulin-induced gene 2 (INSIG2) were quantified by qRT-PCR assay. After a 2-week adipogenic-induction, total RNA was extracted from differentiating cells treated using TRIzol reagent (Sigma-Aldrich) due to the manufacturer’s instruction, and then RNA was reverse transcribed into cDNA using Superscript II reverse transcriptase kit (Invitrogen) following manufacturer’s protocol. Quantitative PCR analysis was performed using StepOnePlus PCR System (Applied Biosystems) and SYBR Premix Ex Taq II, Tli RNaseH Plus (Takara, Japan). Fold changes in gene expression level were calculated by 2−∆∆Ct method, and the results were normalized to the expression of an internal control, Glyceraldehyde-3-Phosphate Dehydrogenase (GAPDH). PCR primer sequences were listed as followed, with primer specificity confirmed on NCBI Primer-BLAST website:

PPARγ: Forward 5′-CAGAAATGCCTTGCAGTGGG-3′, Reverse 5′-AACAGCTTCTCCTTCTCGGC-3′; C/EBPα: Forward 5′-TATAGGCTGGGCTTCCCCTT-3′, Reverse 5′-AGCTTTCTGGTGTGACTCGG-3′; C/EBPβ: Forward 5′-TTTGTCCAAACCAACCGCAC-3′, Reverse 5′-GCATCAACTTCGAAACCGGC-3′; SREBP1c: Forward 5′-TCTCAGTCCCCTGGTCTCTG-3′, Reverse 5′-ATAGGCAGCTTCTCCGCATC-3′; insig-2: Forward 5′-AGTGGTCCAGTGTAATGCGG-3′, Reverse 5′-TGGATAGTGCAGCCAGTGTG-3′; LPL: Forward 5′-GCTCAGGAGCATTACCCAGTGTC, Reverse 5′-GCTCCAAGGCTGTATCCCAAGA-3′; FASN: Forward 5′-ATTCTGCCATAAGCCCTGTC-3′, Reverse 5′-CTGTGTACTCCTTCCCTTCTTG-3; and GAPDH: Forward 5′-CATGAGAAGTATGACAACAGCCT-3′, Reverse 5′-AGTCCTTCCACGATACCAAAGT-3′.

Oil Red O staining

To evaluate the cellular neutral lipid droplet accumulation, mature adipocytes were washed three times with iced phosphate-buffered saline (PBS) which fixed with 4% paraformaldehyde for 30 min. After fixation, the cells were washed three times and stained with Oil Red O solution (ORO) for 15 min at room temperature. Cells were washed three times again with PBS to remove unbound staining. ORO-stained adipocytes were observed under a microscope (Olympus, Tokyo, Japan), and digital images were captured at 100× magnification.

Protein assay

To determine protein concentration, the plated cells were lysed in a buffer involving 50 mM Tris, 150 mM sodium chloride (NaCl), 1% IGEPAL, 5 mM EDTA (Sigma-Aldrich), protease inhibitor cocktail (Roche Diagnostics, Laval, QC, Canada), and centrifuged for lysate collection. Using specific enzyme-linked immunosorbent assay (ELISA) kits (Human FABP4 ELISA kit, Human GLUT4 ELISA kit, Human ERβ ELISA kit, purchased from ZellBio GmbH, Ulm, Germany), and a microplate reader (Epoch Model, BioTek, Vermont, USA). The intra assays precision by the coefficient of variation percent (CV %) related to each ELISA kit were 5.5, 5.8, 6.1, and 5.9 percent, respectively.

Statistics

Data are expressed as means ± standard deviation (SD). The mRNA expressions were determined by analysis of variance (ANOVA) with repeated measures and 2-tailed Student t-tests (SPSS 25 for Windows, standard version; SPSS Inc., Chicago, IL, USA).Using GraphPad (GraphPad Software) and the protein expressions were determined by Kruskal–Wallis one-way analysis of variance and Dunn’s multiple comparison test. Means were considered statistically different when p values were less than 0.05.

Results

The morphology of human adipose-derived mesenchymal stem cells and lipid accumulation were indicated during the differentiation (Fig. 1). More lipid accumulations were observed in control and mesenchymal stem cells treated by 10 nM concentrations of vitamin D plus BPA compared to 0.1 nM vitamin D plus BPA.

Fig. 1
figure1

Oil Red O staining of human adipose-derived mesenchymal stem cells. Phase contrast image of adipocytes were taken by microscope (Olympus, Tokyo, Japan) and digital images were captured at ×100 magnification. Following 14 days of treatment with vitamin D plus BPA showed a significant increase in relative lipid vacuole staining compared with control group

To determine vitamin D plus BPA induced effects on adipogenesis, the mRNA expression of key adipogenic markers and transcription factors were evaluated using qPCR. Vitamin D plus BPA (10 nM) enhanced expression of PPARγ mRNA (P = 0.028) in the early phase of this experiment. In contrast, mRNA expression of PPARγ was suppressed (P = 0.022) through differentiation in response to 0.1 nM vitamin D plus BPA (Fig. 2a).

Fig. 2
figure2

Vitamin D plus BPA modulates the mRNA expression of adipogenic marker genes during adipogenesis dose-dependently. mRNA expression of PPARγ (a), C/EBPα (b) and C/EBPβ (c) in vitamin D plus BPA (10 nM or 0.1 nM) groups during adipogenic differentiation. The relative qPCR values were corrected to GAPDH expression levels and normalized with respect to controls on each time. The mRNA levels are expressed as the fold increase relative to the control

To evaluate whether vitamin D plus BPA affect early or late adipogenesis events, we next assessed the time course effects on mRNA levels of key transcription factors during differentiation. C/EBPα expression was significantly increased at 6 days post-treatment in response to 10 nM vitamin D plus BPA (P = 0.01), the treatment of cells with 0.1 nM vitamin D plus BPA resulted in a statistically significant reduction (P = 0.006) in the mRNA levels of C/EBPα during differentiation (Fig. 2b). While, the mRNA expression of C/EBPβ, an early adipogenic transcription factor, was inhibited (P < 0.001) with vitamin D plus BPA (0.1 nM), a statistically significant enhanced expression was observed on day 6 (P = 0.004) in the treated cells with vitamin D plus BPA (10 nM) (Fig. 2c).

The levels of FASN mRNA, a marker of de novo lipogenesis, were significantly augmented on day 6 from the beginning of the differentiation process of adipogenesis in cells treated by 10 nM vitamin D plus BPA (P = 0.003); however a reduction was markedly observed (P = 0.03) in 0.1 nM vitamin D plus BPA group (Fig. 3a). Vitamin D plus BPA (0.1 nM) treatment resulted in a suppression of LPL mRNA expression (a late marker of adipogenesis) at day 3 (P = 0.01). While the expression of LPL mRNA had the fluctuation with an increase (P = 0.02) during the early period of differentiation (day 3) (Fig. 3b). Following vitamin D plus BPA (10 nM) exposure, mRNA expression of SREBP1c was significantly increased (P = 0.005) during adipogenesis. Moreover, SREBP1c mRNA levels were significantly prohibited upon vitamin D plus BPA (0.1 nM) exposure (P = 0.034).

Fig. 3
figure3

Vitamin D plus BPA (10−8 M) augmented mRNA expression of FASN and LPL in adipocytes. mRNA expression of FASN (a) and LPL (b) in vitamin D plus BPA groups during adipogenic differentiation. The relative qPCR values were corrected to GAPDH expression levels and normalized with respect to controls on each time. The mRNA levels are expressed as the fold increase relative to the control

The treatment with 0.1 nM of vitamin D plus BPA significantly repressed mRNA levels of INSIG2 (P = 0.005), an intermediate regulator between PPARγ and SREBP1c (Fig. 4b). However, the expression levels of INSIG2 were not significantly affected by 10 nM of vitamin D plus BPA (Fig. 4b).

Fig. 4
figure4

Vitamin D plus BPA differentially regulates the mRNA expression of SREBP1c and INSIG2 during adipogenesis. mRNA expression of SREBP1c (a) and INSIG2 (b) in vitamin D groups during adipogenic differentiation. The relative qPCR values were corrected to GAPDH expression levels and normalized with respect to controls on each time. The mRNA levels are expressed as the fold increase relative to the control

Afterwards, vitamin D effect plus BPA treatment on the protein levels of FABP4, other late markers of adipogenesis, was assessed. The findings showed that protein levels of FABP4 were statistically significant increased in control and vitamin D plus BPA (10 nM) groups, not in the concentration of 0.1 nM vitamin D plus BPA (Table 1). Furthermore, the protein level of GLUT4 was gradually augmented with higher concentration upon 0.1 nM vitamin D plus BPA exposure (Table 1).

Table 1 Comparison of protein expression in vitamin D plus BPA groups vs. control

To address whether VDR or ERβ are involved in the action of vitamin D and BPA during human preadipocyte differentiation, protein levels of VDR and ERβ were measured. Vitamin D plus BPA dose-dependently enhanced VDR and ERβ expression levels compared to the control group (Table 1).

Discussion

For the first time and to the best of our knowledge, we tested the collective effects of vitamin D and BPA on adipogenesis in hADMSCs. Our results provide original insights into vitamin D and BPA actions on adipogenic differentiation of human adipose-derived stem cells. Vitamin D and BPA was added to the culture before differentiation started to investigate the impact of early exposure on undifferentiated cells. We observed that exposure to vitamin D plus BPA modulates adipocyte differentiation by altering the expression of master adipogenic markers. The expression of genes associated to adipogenic differentiation, including PPARγ, C/EBPα, C/EBPβ, FASN, LPL, and SREBP1c, was significantly enhanced through treatment with 10 nM vitamin D plus BPA. However, the expression of these genes was inhibited in cells treated to 0.1 nM vitamin D plus BPA. Besides, the expression level of proteins, including VDR, ERβ, and FABP4, was augmented. Since many researches have confirmed the effect of BPA to induce the adipogenic differentiation [17, 19, 20], this difference in gene expression is related to the effect of vitamin D [23, 24]. Moreover, we observed inhibited lipid accumulation in mature adipocytes treated with 0.1 nM vitamin D plus BPA.

The evaluation of gene expression in subcutaneous adipocytes showed significant inhibition of apoptosis by vitamin D. Findings from diet-induced obese mice confirmed that increased vitamin D intake due to induced apoptosis was negatively correlated to the volume of white adipose tissue. Apoptosis was prohibited in 3T3-L1 differentiated cells in a low dose of vitamin D, although apoptosis promoted by the high dose of vitamin D. Vitamin D in physiological dose suppresses mitochondrial uncoupling protein-2 (UCP2), enhanced mitochondrial potential and adenosine triphosphate (ATP) production, and repressed apoptosis [7]. It is postulated that a steady rise in intracellular calcium induced apoptosis by activating calpain-dependent calcium protease followed by activating caspase-12. In mature adipocytes, vitamin D stimulated voltage-dependent and non-voltage-dependent Ca2+ fluxes through Inositol 1,4,5-trisphosphate receptor/Ca2+ release channels (IP3R) and Ryanodine receptor/Ca2+ release channels (RyR) [7].

Contradictory, vitamin D can prevent lipogenesis in 3T3-L1 cells [25,26,27]. Kong et al. showed that vitamin D significantly reduced the lipid-filling rate in adipose tissue and moderated rats’ body weight. They suggested that vitamin D administration modified lipogenesis. They found that the protein levels of lipogenic factors, FAS, Stearoyl-CoA desaturase-1 (SCD1), and Acetyl-CoA carboxylase-1 (ACC1), were downregulated by vitamin D in adipose tissue of pregnant rats, the expression of SREBP-1c and C/EBP-α did not significantly decrease in adipose tissue. Moreover, PPAR-γ was markedly upregulated by vitamin D in adipose tissue [28].

The exposure to BPA is associated to the activation of C/EBPα, LPL, and mTOR, involved in lipogenesis and secretion of adipokines. BPA increases the expression of IL-6 and INF-γ which activates proinflammatory pathway JNK/STAT3/NFκB [17]. On the other hand, C/EBPβ induction happens early during the differentiation which involves mitotic clonal expansion and moderates the downstream upregulation of PPARγ and C/EBPα expression [28, 29]. In contrast to our results, Kong et al. presented that vitamin D had no effect on the expression level of C/EBPβ mRNA in the early stage of adipocyte differentiation. Consequently, they concluded that vitamin D suppression of PPARγ and C/EBPα depends on C/EBPβ expression. INSIG2 is recognized as an endoplasmic reticulum protein which binds to SREBP cleavage-activating protein and inhibits SREBPs activation. The INSIG2 mRNA levels were considerably upregulated following treatment with vitamin D in adipose tissue. Our results also showed 0.1 nM vitamin D plus BPA overexpressed INSIG2 mRNA through differentiation [28].

Consistent to our findings, several evidence [29, 30] indicated that vitamin D antagonizes the transacting activity of PPARγ by competing for the limited amount of RXR by VDR. When vitamin D binds and activates VDR, it may sequester RXR from PPARγ in the early stage of adipogenesis. VDR overexpression happens around C/EBPβ induction time. Thus, vitamin D will possibly inhibit adipocyte differentiation by preventing the reduction of VDR concentration in the late stages.

In contrast to our results which demonstrate an upregulation of adipogenic enzymes, FASN and LPL mRNA in the early stage accompanied by a decrease in the expression of FASN and LPL in the late stage of differentiation, Nimitphong et al. [23] showed that vitamin D increased LPL mRNA only during the later phase of adipogenesis in 3T3-L1.

The data indicated that BPA mediates as an obesogene by signaling through the activation of ER [23, 31,32,33,34].

Ohlstein et al. [20] pointed out that BPA increased induction of ER and adipogenic genes C/EBPα, insulin-like growth factor 1 (IFG1), PPARγ, and LPL during differentiation of hASCs into adipocytes. While, the additional studies indicated that BPA exposure promoted the expression of LPL [34, 35] and PPARγ [35, 36]. Chamorro-Garcia et al. [37] reported no effect in human BMSCs upon BPA treatment. Besides, Linehan et al. indicated that by decreasing LPL mRNA expression, BPA prevents lipid accumulation in human stem cells. The expression level of C/EBPα, PPARγ, and FABP4 were not significantly changed despite the upregulation of LPL through treatment with BPA, indicating that LPL can enhance the lipid accumulation independently of C/EBPα, PPARγ, and FABP4 y[21].

Conclusions

One of the limitations of the present experiment is that lipid accumulation was not quantitatively measured during the morphological evaluation of differentiated cells. However, more lipid vacuoles were observed in 10 nM vitamin D plus BPA group compared to control and 0.1 nM vitamin D plus BPA groups.

To conclude, experimental studies identified the molecular targets and signaling pathways which may play a role in the pathogenesis of obesity due to exposure to BPA through examining tissues such as the thyroid, pancreas, liver, and adipose. BPA, as an endocrine disruptor, may be involved in lipid metabolism, enhance, and accelerate adipogenesis.

The effects of vitamin D and VDR on adipogenesis are not exactly the same, and VDR acts as an enhancer of adipogenesis, the role of vitamin D is not specified. It is currently challenging to determine the role of vitamin D in adipogenesis. Further researches are guaranteed to clarify its effect on adipogenesis.

Availability of data and materials

Not applicable.

Abbreviations

ACC1:

Acetyl-CoA carboxylase-1

ATP:

Adenosine triphosphate

BMI:

Body mass index

BPA:

Bisphenol-A

C/EBP α:

CCAAT-enhancer-binding protein-alpha

C/EBP β:

CCAAT-enhancer-binding protein-Beta

DMEM:

Dulbecco’s modified Eagle medium

ELISA:

Enzyme-linked immunosorbent assay

ER-β:

Estrogen receptor-beta

ETO:

Eight-Twenty-One factor

FABP4:

Fatty acid-binding protein-4

FASN:

Fatty acid synthase

GAPDH:

Glyceraldehyde-3-phosphate dehydrogenase

GLUT-1:

Glucose transporter-1

GLUT4:

Glucose transporter-4

hADMSCs:

Human adipose-derived mesenchymal stem cells

IBMX:

3-Isobutyl-3-methylxanthine

IFG1:

Insulin-like growth factor-1

INSIG2:

Insulin- induced gene-2

IP3R:

Inositol 1,4,5-trisphosphate receptor/Ca2+ release channels

LPL:

Lipoprotein lipase

mRNA:

Messenger ribonucleic acid

PBS:

Phosphate-buffered saline

PPARγ:

Peroxisome proliferator-activated receptor-gamma

qPCR:

Quantitative polymerase chain reaction

RXR:

Retinoid X receptor

RyR:

Ryanodine receptor/Ca2+ release channels

SCD1:

Stearoyl-CoA desaturase-1

SD:

Standard deviation

SREBP1c:

Sterol regulatory element-binding protein-1c

UCP2:

Uncoupling protein-2

VDR:

Vitamin D receptor

1,25(OH)2D3:

1,25-Dihydroxy-vitamin D3

References

  1. 1.

    Heymsfield SB, Wadden TA. Mechanisms, pathophysiology, and management of obesity. N Engl J Med. 2017;376:254–66.

    CAS  Article  Google Scholar 

  2. 2.

    Gadde KM, Martin CK, Berthoud HR, et al. Obesity: pathophysiology and management. J Am Coll Cardiol. 2018;71:69–84.

    Article  Google Scholar 

  3. 3.

    Sarjeant K, Stephens JM. Adipogenesis. Cold Spring Harb Perspect Biol. 2012;4:a008417.

    Article  Google Scholar 

  4. 4.

    Stephens JM. The fat controller: adipocyte development. PLoS Biol. 2012;10:e1001436.

    CAS  Article  Google Scholar 

  5. 5.

    Lowe CE, O’Rahilly S, Rochford JJ. Adipogenesis at a glance. J cell sci. 2011;124:2681–6.

    CAS  Article  Google Scholar 

  6. 6.

    vinh quốc Lương K, Nguyễn LT. The beneficial role of vitamin D in obesity: possible genetic and cell signaling mechanisms. Nutr J. 2013;12:89.

    Article  Google Scholar 

  7. 7.

    Abbas MA. Physiological functions of vitamin D in adipose tissue. J Steroid Biochem Mol Biol. 2017;165:369–81.

    CAS  Article  Google Scholar 

  8. 8.

    Bouillon R, Carmeliet G, Lieben L, et al. Vitamin D and energy homeostasis—of mice and men. Nat Rev Endocrinol. 2014;10:79.

    CAS  Article  Google Scholar 

  9. 9.

    Mutt SJ, Hyppönen E, Saarnio J, et al. Vitamin D and adipose tissue—more than storage. Front Physiol. 2014;5:228.

    Article  Google Scholar 

  10. 10.

    Landrier JF, Karkeni E, Marcotorchino J, et al. Vitamin D modulates adipose tissue biology: possible consequences for obesity? Proc Nutr Soc. 2016;75:38–46.

    CAS  Article  Google Scholar 

  11. 11.

    Ding C, Gao D, Wilding J, et al. Vitamin D signalling in adipose tissue. Br J Nutr. 2012;108:1915–23.

    CAS  Article  Google Scholar 

  12. 12.

    Ruiz-Ojeda FJ, Anguita-Ruiz A, Leis R, et al. Genetic factors and molecular mechanisms of vitamin D and obesity relationship. Ann Nutr Metab. 2018;73:89–99.

    CAS  Article  Google Scholar 

  13. 13.

    Wong KE, Kong J, Zhang W, et al. Targeted expression of human vitamin D receptor in adipocytes decreases energy expenditure and induces obesity in mice. J Biol Chem. 2011;286:33804–10.

    CAS  Article  Google Scholar 

  14. 14.

    Wong KE, Szeto FL, Zhang W, et al. Involvement of the vitamin D receptor in energy metabolism: regulation of uncoupling proteins. Am J Physiol Endocrinol Metab. 2009;296:E820–8.

    CAS  Article  Google Scholar 

  15. 15.

    Darbre PD. Endocrine disruptors and obesity. Curr Obes Rep. 2017;6:18.

    Article  Google Scholar 

  16. 16.

    Gore AC, Chappell VA, Fenton SE, et al. EDC-2: the Endocrine Society’s second scientific statement on endocrine-disrupting chemicals. Endocr Rev. 2015;36:E1-50.

    CAS  Article  Google Scholar 

  17. 17.

    Legeay S, Faure S. Is bisphenol A an environmental obesogen? Fundam Clin Pharmacol. 2017;31:594–609.

    CAS  PubMed  Google Scholar 

  18. 18.

    Caporossi L, Papaleo B. Bisphenol A and metabolic diseases: challenges for occupational medicine. Int J Environ Res Public Health. 2017;14:959.

    Article  Google Scholar 

  19. 19.

    Acconcia F, Pallottini V, Marino M. Molecular mechanisms of action of BPA. Dose Response. 2015;13:1559325815610582.

    Article  Google Scholar 

  20. 20.

    Ohlstein JF, Strong AL, McLachlan JA, et al. Bisphenol A enhances adipogenic differentiation of human adipose stromal/stem cells. J Mol Endocrinol. 2014;53:345.

    CAS  Article  Google Scholar 

  21. 21.

    Linehan C, Gupta S, Samali A, et al. Bisphenol A-mediated suppression of LPL gene expression inhibits triglyceride accumulation during adipogenic differentiation of human adult stem cells. PLoS ONE. 2012;7:e36109.

    CAS  Article  Google Scholar 

  22. 22.

    Masuno H, Kidani T, Sekiya K, et al. Bisphenol A in combination with insulin can accelerate the conversion of 3T3-L1 fibroblasts to adipocytes. J Lipid Res. 2002;43:676–84.

    CAS  Article  Google Scholar 

  23. 23.

    Nimitphong H, Holick MF, Fried SK, et al. 25-Hydroxyvitamin D3 and 1, 25-dihydroxyvitamin D3 promote the differentiation of human subcutaneous preadipocytes. PLoS ONE. 2012;18:e52171.

    Article  Google Scholar 

  24. 24.

    Felicidade I, Sartori D, Coort SL, Semprebon SC, Niwa AM, D’Epiro GF, Biazi BI, Marques LA, Evelo CT, Mantovani MS, Ribeiro LR. Role of 1α, 25-dihydroxyvitamin D3 in adipogenesis of SGBS cells: new insights into human preadipocyte proliferation. Cell Physiol Biochem. 2018;48(1):407–18.

    Article  Google Scholar 

  25. 25.

    Blumberg JM, Tzameli I, Astapova I, et al. Complex role of the vitamin D receptor and its ligand in adipogenesis in 3T3-L1 cells. J Biol Chem. 2006;281:11205–13.

    CAS  Article  Google Scholar 

  26. 26.

    Lee S, Lee DK, Choi E, et al. Identification of a functional vitamin D response element in the murine Insig-2 promoter and its potential role in the differentiation of 3T3-L1 preadipocytes. Mol Endocrinol. 2005;19:399–408.

    CAS  Article  Google Scholar 

  27. 27.

    Natarajan R. Vitamin D metabolites inhibit adipocyte differentiation in 3T3-L1 preadipocytes. Dissertation, University of Massachusetts; 2008.

  28. 28.

    Kong J, Li YC. Molecular mechanism of 1, 25-dihydroxyvitamin D3 inhibition of adipogenesis in 3T3-L1 cells. Am J Physiol Endocrinol Metab. 2006;290:E916.

    CAS  Article  Google Scholar 

  29. 29.

    Tang QQ, Otto TC, Lane MD. CCAAT/enhancer-binding protein beta is required for mitotic clonal expansion during adipogenesis. Proc Natl Acad Sci USA. 2003;100:850.

    CAS  Article  Google Scholar 

  30. 30.

    Haussler MR, Jurutka PW, Mizwicki M, et al. Vitamin D receptor (VDR)-mediated actions of 1α, 25 (OH) 2vitamin D3: genomic and non-genomic mechanisms. Best Pract Res Clin Endocrinol Metab. 2011;25:543–59.

    CAS  Article  Google Scholar 

  31. 31.

    Pike JW, Meyer MB. The vitamin D receptor: new paradigms for the regulation of gene expression by 1, 25-dihydroxyvitamin D3. Rheum Dis Clin North Am. 2012;38:13.

    Article  Google Scholar 

  32. 32.

    Kim SM, Jung EM, An BS, et al. Additional effects of bisphenol A and paraben on the induction of calbindin-D (9K) and progesterone receptor via an estrogen receptor pathway in rat pituitary GH3 cells. J Physiol Pharmacol. 2012;63:445–55.

    CAS  PubMed  Google Scholar 

  33. 33.

    Li Y, Burns KA, Arao Y, et al. Differential estrogenic actions of endocrine-disrupting chemicals bisphenol A, bisphenol AF, and zearalenone through estrogen receptor α and β in vitro. Environ Health Perspect. 2012;120:1029–35.

    CAS  Article  Google Scholar 

  34. 34.

    Sargis RM, Johnson DN, Choudhury RA, et al. Environmental endocrine disruptors promote adipogenesis in the 3T3-L1 cell line through glucocorticoid receptor activation. Obesity. 2010;18:1283–8.

    CAS  Article  Google Scholar 

  35. 35.

    Masuno H, Iwanami J, Kidani T, et al. Bisphenol a accelerates terminal differentiation of 3T3-L1 cells into adipocytes through the phosphatidylinositol 3-kinase pathway. Toxicol Sci. 2005;84:319–27.

    CAS  Article  Google Scholar 

  36. 36.

    Chen EZ, Cornet P, Lazimi G, et al. Impact of endocrine disrupting chemicals on birth outcomes. Gynecol Obstet Fertil. 2013;41:601–10.

    Article  Google Scholar 

  37. 37.

    Chamorro-García R, Kirchner S, Li X, et al. Bisphenol A diglycidyl ether induces adipogenic differentiation of multipotent stromal stem cells through a peroxisome proliferator–activated receptor gamma-independent mechanism. Environ Health Perspect. 2012;120:984–9.

    Article  Google Scholar 

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Acknowledgements

The authors would like to thank all the staff of human cells bank of Iranian Biological Resource Center laboratory who worked on this research.

Funding

This research was supported by grants from Iran University of Medical Sciences (Grant No. 27697) and Shahid Beheshti Research Institute for Endocrine Sciences (Grant No. 96044).

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AS, FS, MH, and ASF designed that study and critical revision of the manuscript for important intellectual content. ANT carried out the laboratory analysis. SM analyzed the data and interpretation. AS and ANT wrote the first draft of the manuscript. All authors contributed to the final version of the manuscript. All authors read and approved the final manuscript.

Corresponding author

Correspondence to Farzad Shidfar.

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Ethics approval and consent to participate

The experiment was conducted consistent with the guidelines set by the Declaration of Helsinki, and all processes and techniques containing human tissue were approved by the Ethics Committee of the Iran University of Medical Sciences and Research Institute for Endocrine Sciences, Shahid Beheshti University of Medical Sciences.

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No personal data is noted herein.

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The authors declare that they have no conflict of interest.

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Salehpour, A., Shidfar, F., Hedayati, M. et al. Molecular mechanisms of vitamin D plus Bisphenol A effects on adipogenesis in human adipose-derived mesenchymal stem cells. Diabetol Metab Syndr 13, 41 (2021). https://doi.org/10.1186/s13098-021-00661-4

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Keywords

  • 1,25-Dihydroxyvitamin D3
  • Bisphenol A
  • Adipogenesis
  • Human adipose-derived mesenchymal stem cells
  • Gene expression