Adipose Tissue-derived Mesenchymal Stem Cells Transplantation Research Articles

Adipose-Derived Mesenchymal Stem Cells and Their Derived Epidermal Progenitor Cells Conditioned Media Ameliorate Skin Aging in Rats.

Skin alterations are among the most prominent signs of aging, and they arise from both intrinsic and extrinsic factors that interact and mutually influence one another. The use of D-galactose as an aging model in animals has been widely employed in anti-aging research. Adipose tissue-derived mesenchymal stem cells (Ad-MSCs) are particularly promising for skin anti-aging therapy due to their capacity for effective re-epithelization and secretion of various growth factors essential for skin regeneration. Accordingly, we aimed to examine the potential utility of Ad-MSCs as a therapy for skin anti-aging. In this study, we isolated and characterized adipose-derived mesenchymal stem cells (Ad-MSCs) from the epididymal fat of male Sprague Dawley rats. We assessed the in vitro differentiation of Ad-MSCs into epidermal progenitor cells (EPCs) using ascorbic acid and hydrocoritsone. Additionally, we induced skin aging in female Sprague Dawley rats via daily intradermal injection of D-galactose over a period of 8weeks. Then we evaluated the therapeutic potential of intradermal transplantation of Ad-MSCs and conditioned media (CM) derived from differentiated EPCs in the D-galactose-induced aging rats. Morphological assessments, antioxidant assays, and histopathological examinations were performed to investigate the effects of the treatments. Our findings revealed the significant capability of Ad-MSCs to differentiate into EPCs. Notably, compared to the group that received CM treatment, the Ad-MSCs-treated group exhibited a marked improvement in morphological appearance, antioxidant levels and histological features. These results underscore the effectiveness of Ad-MSCs in restoring skin aging as a potential therapy for skin aging.

Adipose tissue-derived mesenchymal stem cells ameliorate cognitive impairment in Alzheimer's disease rat model: Emerging role of SIRT1.

Alzheimer's disease (AD) is a complex form of neurodegenerative dementia. Growing body of evidence supports the cardinal role of sirtuin1 (SIRT1) in neurodegeneration and AD development. Recently, adipose tissue-derived mesenchymal stem cells (Ad-MSCs) have made their mark for a wide array of regenerative medicine applications, including neurodegenerative disorders. Therefore, the present study aimed to investigate the therapeutic potential of Ad-MSCs in AD rat model, and to explore the possible implication of SIRT1. Ad-MSCs were isolated from rat epididymal fat pads and properly characterized. Aluminum chloride was used to induce AD in rats, and afterward, a group of AD-induced rats received a single dose of Ad-MSCs (2 × 106 cell, I.V per rat). One month after Ad-MSCs transplantation, behavioral tests were done, brain tissues were collected, then histopathological and biochemical assessments were performed. Amyloid beta and SIRT1 levels were determined by enzyme-linked immunosorbent assay. Whereas expression levels of neprilysin, BCL2 associated X protein, B-cell lymphoma-2, interleukin-1β, interleukin-6, and nerve growth factor in hippocampus and frontal cortex brain tissues were assessed using reverse transcriptase quantitative polymerase chain reaction. Our data demonstrated that transplantation of Ad-MSCs alleviated cognitive impairment in AD rats. Additionally, they exhibited anti-amyloidogenic, antiapoptotic, anti-inflammatory, as well as neurogenic effects. Furthermore, Ad-MSCs were found to possibly mediate their therapeutic effects, at least partially, via modulating both central and systemic SIRT1 levels. Hence, the current study portrays Ad-MSCs as an effective therapeutic approach for AD management and opens the door for future investigations to further elucidate the role of SIRT1 and its interrelated molecular mediators in AD.

Adipose-derived mesenchymal stem cells preserve cardiac function via ANT-1 in dilated cardiomyopathy hamster model.

IntroductionIdiopathic dilated cardiomyopathy (DCM) is associated with abnormalities in cytoskeletal proteins, mitochondrial ATP transporter, microvasculature, and fibrosis. Mesenchymal stem cells (MSCs) can ameliorate distressed mitochondrial and structural proteins, as well as fibrosis, via the paracrine effect of cytokines. This study aimed to investigate whether the transplantation of adipose tissue-derived MSCs (ADSCs) reverses histological and functional abnormalities in the distressed myocardium of DCM-like hamsters by modulating the expression of adenine nucleotide translocase 1 (ANT-1).MethodsEighteen weeks after birth, ADSCs were implanted onto the cardiac surface of δ-sarcoglycan (SG)-deficient hamsters or sham surgery was performed.ResultsLeft ventricular ejection fraction and end-systolic diameter were maintained in ADSC-treated animals for four weeks, ATP concentration was considerably elevated in the cardiomyocytes of these animals, and ANT-1 expression was significantly upregulated as well. The expression of extracellular matrix and myocardial cytoskeletal proteins, such as collagen, SG, and α-dystroglycan, did not differ between groups. However, significant improvements in myosin and Smad4 expression, cardiomyocyte hypertrophy, and capillary density occurred in the ADSC-treated group.ConclusionsWe demonstrated that ADSCs might maintain cardiac function in the DCM hamster model by enhancing ATP concentration, as well as mitochondrial transporter and myosin expression, indicating their potential for DCM treatment.

Enhancing therapeutic effects and in vivo tracking of adipose tissue-derived mesenchymal stem cells for liver injury using bioorthogonal click chemistry.

Adipose tissue-derived mesenchymal stem cell (ADSC)-based therapy is attractive for liver diseases, but the long-term therapeutic outcome is still far from satisfaction due to the low hepatic engraftment efficiency of ADSC transplantation. Herein, we propose a strategy based on liver sinusoidal endothelial cell (LSEC)-targeting peptide modification and near infrared (NIR) fluorescent probe labeling for enhancing LSEC-barrier-migration ability and in vivo tracking of ADSCs in a liver injury mouse model. RLTRKRGLK (RK), a LSEC-targeted peptide, and indocyanine green (ICG), a FDA approved infrared fluorescent dye, were simultaneously modified on the ADSC surface via a bioorthogonal click reaction. The equipped ADSCs not only exhibited significant binding ability towards LSEC both in vitro and in vivo, but could also be monitored by NIR imaging in vivo. In particular, the RK-modified ADSCs showed remarkable higher hepatic accumulation as compared to unmodified ADSCs, resulting in better therapeutic outcomes. Therefore, this study provides a simple and convenient method for enhancing the homing of transplanted ADSCs to injured liver accompanying with in vivo cell tracking ability, which may shed light on accelerating the clinical translation of the ADSC-based therapy for liver diseases.

Antioxidant preconditioning improves therapeutic outcomes of adipose tissue-derived mesenchymal stem cells through enhancing intrahepatic engraftment efficiency in a mouse liver fibrosis model

BackgroundAlthough it has been preclinically suggested that adipose tissue-derived mesenchymal stem cell (ADSC)-based therapy could effectively treat chronic liver diseases, the hepatic engraftment of ADSCs is still extremely low, which severely limits their long-term efficacy for chronic liver diseases. This study was designed to investigate the impact of antioxidant preconditioning on hepatic engraftment efficiency and therapeutic outcomes of ADSC transplantation in liver fibrotic mice.MethodsLiver fibrosis model was established by using intraperitoneal injection of carbon tetrachloride (CCl4) in the male C57BL/6 mice. Subsequently, the ADSCs with or without antioxidant pretreatment (including melatonin and reduced glutathione (GSH)) were administrated into fibrotic mice via tail vein injection. Afterwards, the ADSC transplantation efficiency was analyzed by ex vivo imaging, and the liver functions were assessed by biochemical analysis and histopathological examination, respectively. Additionally, a typical hydrogen peroxide (H2O2)-induced cell injury model was applied to mimic the cell oxidative injury to further investigate the protective effects of antioxidant preconditioning on cell migration, proliferation, and apoptosis of ADSCs.ResultsOur data showed that antioxidant preconditioning could enhance the therapeutic effects of ADSCs on liver function recovery by reducing the level of AST, ALT, and TBIL, as well as the content of hepatic hydroxyproline and fibrotic area in liver tissues. Particularly, we also found that antioxidant preconditioning could enhance hepatic engraftment efficiency of ADSCs in liver fibrosis model through inhibiting oxidative injury.ConclusionsAntioxidant preconditioning could effectively improve therapeutic effects of ADSC transplantation for liver fibrosis through enhancing intrahepatic engraftment efficiency by reducing oxidative injuries. These findings might provide a practical strategy for enhancing ADSC transplantation and therapeutic efficiency.

Transplantation of neuregulin 4-overexpressing adipose-derived mesenchymal stem cells ameliorates insulin resistance by attenuating hepatic steatosis

Due to high-fat and high-sugar diets accompanied by sedentary lifestyles, diabetes has become a global epidemic. Literature findings suggest a potential therapeutic effect of Nrg4 on treating obesity-related metabolic disorders including type 2 diabetes (T2D). Adipose tissue-derived MSCs (ADSCs) were used in our study as they are abundant and can be harvested with minimally invasive procedures. In the end, our study reveals that ADSC transplantation improves glucose tolerance and metabolic balance in HFD-fed mice by multiple mechanisms, including upregulating GLUT4 expression and suppressing inflammation. More importantly, our study shows that Nrg4 overexpression could improve the efficacy of ADSCs in ameliorating insulin resistance (IR) and other obesity-related metabolic disorders, given the function of Nrg4 in attenuating hepatic lipogenesis. It would provide a new therapeutic strategy for the treatment of obesity, IR, and T2D.

Effect of adipose tissue-derived mesenchymal stem cell transplantation in treatment of liver fibrosis and possible mechanism

Objective: To investigate the effect of adipose tissue-derived mesenchymal stem cell (ADSC) transplantation in the treatment of liver fibrosis rats and possible mechanism. Methods: Subcutaneous adipose tissue in the inguinal region of rats was collected to isolate ADSCs. The rats with liver fibrosis induced by intraperitoneally injected carbon tetrachloride were divided into cell transplantation group and phosphate buffer saline (PBS) injection group, and the rats which were fed normally were enrolled as negative control group. The rats in the cell transplantation group were given tail vein injection of ADSCs, and those in the PBS injection group were given injection of 0.5 ml PBS. At 7 days after transplantation, blood samples were collected from the inferior vena cava to evaluate liver function; liver tissue was collected to measure the protein expression of hepatocyte growth factor (HGF) and alpha-smooth muscle actin (α-SMA); Masson trichrome staining was used to evaluate intrahepatic collagen deposition. Hepatic stellate cells (HSCs) were collected from the rats with liver fibrosis, and indirect co-culture of HSCs and ADSCs was performed in vitro to analyze the influence of ADSCs on the proliferation and apoptosis of HSCs. The independent samples t-test was used for comparison between groups, and an analysis of variance was used for comparison of means between multiple samples. Results: ADSCs were found in liver tissue in the transplantation group, and compared with the PBS injection group, the transplantation group had significant alleviation in hepatocyte necrosis, vacuolization, and area of fibrosis and significant reductions in the serum levels of aminotransferases, while there was no significant difference in the level of albumin between the two groups. Compared with the PBS injection group, the transplantation group had significant upregulation in the protein expression of HGF and significant downregulation in the protein expression of α-SMA (both P < 0.05). In vitro co-culture for 72 hours showed that ADSCs inhibited the proliferation of HSCs, and there was a significant difference between the co-culture group and the control group with HSCs cultured alone. Caspase-3 immunostaining showed that after co-culture for 72 hours, there was a significant difference in the apoptosis rate of HSCs between the co-culture group and the control group with HSCs cultured alone (23.42% ± 3.02% vs 14.82% ± 3.93%). Conclusion: ADSC transplantation can upregulate the expression of HGF in the liver, promote the apoptosis of HSCs, and thus alleviate liver fibrosis.

Enhanced tissue remodelling efficacy of adipose-derived mesenchymal stem cells using injectable matrices in radiation-damaged salivary gland model.

The present study was conducted to introduce the use of a delivery carrier for local transplantation of human adipose tissue-derived mesenchymal stem cells (AdMSCs) into the salivary gland (SG) and analyse its ability to enhance radioprotection of AdMSCs against irradiation (IR)-induced damage. An injectable porcine small intestinal submucosa (SIS) matrix was used as a cell delivery carrier, and human AdMSCs were contained within SIS hydrogel (AdMSC/SIS). After local injection into SGs of mice following local IR, morphological and functional changes were evaluated in the sham, vehicle [phosphate-buffered saline (PBS)], SIS, AdMSC and AdMSC/SIS groups. Local transplantation of AdMSC resulted in less fibrosis, regardless of the use of a carrier, but the AdMSC/SIS group showed more mucin-producing acini relative to those in the PBS group. Functional restoration of salivation capacity and salivary protein synthesis was achieved in AdMSC and AdMSC/SIS groups, with a greater tendency being observed in the AdMSC/SIS group. AdMSC treatment resulted in tissue remodelling with a greater number of salivary epithelial cells (AQP-5), SG progenitor cells (c-Kit), endothelial cells (CD31) and myoepithelial cells (α-SMA), among which endothelial and myoepithelial cells significantly increased in the AdMSC/SIS group relative to the AdMSC group. AdMSC treatment alleviated IR-induced cell death, and the anti-apoptotic and anti-oxidative effects of AdMSC were enhanced in the AdMSC/SIS group relative to the AdMSC group. These results suggest local transplantation of AdMSC improves tissue remodelling following radiation damage in SG tissue, and that use of a carrier enhances the protective effects of AdMSC-mediated cellular protection against IR via paracrine secretion. Copyright © 2016 John Wiley & Sons, Ltd.

Allogenic Adipose Tissue-Derived Mesenchymal Stem Cells Ameliorate Acute Hepatic Injury in Dogs.

Adipose tissue-derived mesenchymal stem cells (AT-MSCs) are an attractive source for cell-based therapy of some diseases, including acute and chronic liver failure, in not only human medicine but also veterinary medicine. However, in veterinary medicine, no studies have reported the effects of AT-MSCs on liver injury in dogs. The purpose of this study was to investigate the effects of allogenic AT-MSCs on acute liver injury by carbon tetrachloride in dogs and to compare the therapeutic effects of AT-MSCs transplanted via the peripheral vein (PV) or splenic vein (SV). After transplantation of AT-MSCs through the PV or SV, serum liver enzymes were decreased significantly, and SV injection was more effective compared with PV injection. By comparing the number of engrafted AT-MSCs in the liver, SV injection was significantly more effective than PV injection. mRNA expression levels of proinflammatory cytokines, such as IL-1, IL-6, IL-8, and IFNγ, in the liver were decreased significantly, but those of anti-inflammatory cytokines, such as IL-4 and IL-10, HGF, and VEGFA, were significantly increased after the first AT-MSC injection. These findings suggest that allogenic AT-MSCs injected via the PV or SV ameliorate acute hepatic injury in dogs, and AT-MSCs injected via the SV provide more effective improvement.

Mesenchymal stem cell transplantation can restore lupus disease-associated miRNA expression and Th1/Th2 ratios in a murine model of SLE.

C3.MRL-Faslpr/J mice spontaneously develop high titers of anti-dsDNA, mild glomerular nephritis, and severe lymphoproliferation symptoms. This study aimed to compare the effects of long-term serial administration of human adipose tissue-derived mesenchymal stem cells (ASCs), and cyclophosphamide treatment in C3.MRL-Faslpr/J mice using a murine SLE model. C3.MRL-Faslpr/J mice were divided into saline (C), cyclophosphamide (Y), and ASC (H) treatment groups. Background-matched control C3H mice treated with saline (N) were also compared. The Y group showed the greatest improvement in disease parameters, but with damaged trabecular integrity. ASC transplantation reduced anti-dsDNA levels, glomerular C3 deposition and CD138 proportion significantly, without trabecular damage. Furthermore, both cyclophosphamide and ASC treatment significantly decreased the ratio of Th1/Th2 compared with the saline-treatment. The expression levels of miR-31-5p, miR-96-5p, miR-182-5p, miR-183-5p, and miR-379-5p were significantly higher, while those of miR150-5p were significantly lower in the C group than in the N group. The expression levels of miR-96-5p, miR-182-5p in the Y and H groups were significantly lower than in the C group. Thus, treatment with cyclophosphamide or ASC can change miRNAs and decrease miR-96-5p and miR-182-5p expression, as well as decreasing the CD138 proportion and the Th1/Th2 ratio, which might be involved in the therapeutic mechanism.

Comparative Efficacies of Long-Term Serial Transplantation of Syngeneic, Allogeneic, Xenogeneic, or CTLA4Ig-Overproducing Xenogeneic Adipose Tissue-Derived Mesenchymal Stem Cells on Murine Systemic Lupus Erythematosus

Allogeneic and xenogeneic transplantation are suitable alternatives for treating patients with stem cell defects and autoimmune diseases. The purpose of this study was to compare the effects of long-term serial transplantation of adipose tissue-derived mesenchymal stem cells (ASCs) from (NZB × NZW) F1 mice (syngeneic), BALB/c mice (allogeneic), or humans (xenogeneic) on systemic lupus erythematosus (SLE). The effects of transplanting human ASCs overproducing CTLA4Ig (CTLA4Ig-hASC) were also compared. Animals were divided into five experimental groups, according to the transplanted cell type. Approximately 500,000 ASCs were administered intravenously every 2 weeks from 6 to 60 weeks of age to all mice except for the control mice, which received saline. The human ASC groups (hASC and CTLA4Ig-hASC) showed a 13-week increase in average life spans and increased survival rates and decreased blood urea nitrogen, proteinuria, and glomerular IgG deposition. The allogeneic group also showed higher survival rates compared to those of the control, up to 40, 41, 42, 43, 44, 45, 52, and 53 weeks of age. Syngeneic ASC transplantation did not accelerate the mortality of the mice. The mean life span of both the syngeneic and allogeneic groups was prolonged for 6-7 weeks. Both human ASC groups displayed increased serum interleukin-10 and interleukin-4 levels, whereas both mouse ASC groups displayed significantly increased GM-CSF and interferon-γ levels in the serum. The strongest humoral immune response was induced by xenogeneic transplantation, followed by allogeneic, CTLA4Ig-xenogeneic, and syngeneic transplantations. Long-term serial transplantation of the ASCs from various sources displayed different patterns of cytokine expression and humoral responses, but all of them increased life spans in an SLE mouse model.

Autologous adipose tissue‑derived mesenchymal stem cells are involved in rat liver regeneration following repeat partial hepatectomy.

Adipose tissue-derived mesenchymal stem cells (ADSCs) have been considered to be attractive and readily available adult mesenchymal stem cells, and they are becoming increasingly popular for use in regenerative cell therapy, as they are readily accessible through minimally invasive techniques. The present study investigated whether autologous ADSC transplantation promoted liver regeneration following a repeat partial hepatectomy in rats. The rats were divided into three groups as follows: 70% partial hepatectomy (PH) group; repeat PH (R-PH) group and R-PH/ADSC group, subjected to R-PH and treated with autologous ADSCs via portal vein injection. In each group, the rats were sacrificed at different time points postoperatively in order to evaluate the changes in liver function and to estimate the liver regenerative response. The expression of proliferating cell nuclear antigen (PCNA) labeling index in the liver was measured using immunohistochemistry. The expression levels of hepatocyte growth factor (HGF) mRNA were measured using reverse transcription polymerase chain reaction. The results showed that regeneration of the remaining liver following R-PH was significantly promoted by ADSC transplantation, as shown by a significant increase in liver to body weight ratio and the PCNA labeling index at 24 h post-hepatectomy. Additionally, ADSC transplantation markedly inhibited the elevation of serum levels of alanine aminotransferase, aspartate aminotransferase and total bilirubin, increased HGF content and also attenuated hepatic vacuolar degeneration 24 h postoperatively. Furthermore, the liver was found to almost fully recover from hepatocellular damage due to hepatectomy among the three groups at 168 h postoperatively. These results indicated that autologous ADSC transplantation enhanced the regenerative capacity of the remnant liver tissues in the early phase following R-PH.

Therapeutic effects of CTLA4Ig gene-transduced adipose tissue-derived mesenchymal stem cell transplantation on established autoimmune thyroiditis.

This study aimed to identify the beneficial effects of adipose tissue-derived mesenchymal stem cells (ASCs) and ASCs that overexpress the CTLA4Ig gene (CTLA4Ig-ASCs) on established autoimmune thyroiditis and to examine changes in clinical chemistry parameters and the presence of humoral responses upon repeated long-term administration of autologous ASCs. This study also aimed to acquire desirable results in a preclinical study by using large-sized lab animals and applying ASCs that overexpress therapeutic genes. Experimental autoimmune thyroiditis was induced by immunization with thyroglobulin. Experimental dogs were divided into five groups: (i) ASC IT + IV, (ii) ASC IV, (iii) CTLA4Ig-ASC IT + IV, (iv) CTLA4Ig-ASC IV, and (v) control IT + IV (saline only), and they received intrathyroidal (IT; 10 million cells/250 µl saline per thyroid) administration one time or intravenous (IV; 20 million cells/5 ml) administration seven times within a 101-day period. Blood samples were collected every week, and thyroids were harvested on days 104-106. After serial ASC or CTLA4Ig transplantation, the levels of canine thyroglobulin autoantibodies (TgAA) in serum and the infiltration of T-lymphocytes between the follicles of the thyroid glands were decreased. The expression of FoxP3 in submandibular lymph nodes was significantly increased. Repeated long-term administration of autologous ASCs or CTLA4Ig-ASCs did not generate changes in clinical chemistry parameters or humoral responses.The TgAA test can detect autoimmune thyroiditis years before clinical signs of hypothyroidism occur. Thus, ASC and CTLA4Ig-ASC transplantation in that period can be attractive candidates to ameliorate autoimmune thyroiditis and prevent the development of hypothyroidism.

Comparison of early and delayed transplantation of adipose tissue-derived mesenchymal stem cells on pulmonary arterial function in monocrotaline-induced pulmonary arterial hypertensive rats

The aim of this article was to investigate the effects of early and delayed transplantation of adipose tissue-derived mesenchymal stem cells (ADMSCs) on pulmonary vasomotion in monocrotaline (MCT)-induced pulmonary arterial hypertensive (PAH) rats. Adipose tissue-derived mesenchymal stem cells were isolated from inguinal subcutaneous adipose tissue of Sprague-Dawley (SD) rats. Eighty male SD rats were divided into four groups ( n = 20 per group): normal control (Ctr), PAH, early (at day 7, ADMSCs-7), and delayed (at day 14, ADMSCs-14) ADMSC intervention. PAH was induced by a single dose intraperitoneal injection of 40 mg/kg MCT. About 1 × 106 ADMSCs were delivered via left external jugular vein. Mean pulmonary arterial pressure (MPAP) was measured by catheterization at days 21 and 28 after MCT injection. Pulmonary arteriolar endothelium-dependent relaxation (EDdR), endothelium-independent relaxation (EDiR), and vasoconstriction function were evaluated by the physiological vascular ring tension recording system. Mean pulmonary arterial pressure (mmHg) was increased on days 21 (26.88 ± 0.86 vs. 14.88 ± 0.98, P < 0.05) and 28 (32.22 ± 0.71 vs. 15.16 ± 0.95, P < 0.05) after MCT administration; EDdR and EDiR were lower in PAH rats at the 21st day (pD2:EDdR: 4.85 ± 0.29 vs. 8.12 ± 0.48 and EDiR: 6.28 ± 0.38 vs. 8.64 ± 0.35; all P < 0.05) and 28th day (pD2:EDdR: 3.22 ± 0.61 vs. 7.93 ± 0.5 and pD2:EDiR: 5.4 ± 0.55 vs. 8.58 ± 0.41; all P < 0.05). Mean pulmonary arterial pressure in ADMSCs-7 was decreased on the 21st day (16.37 ± 0.94 vs. 26.88 ± 0.86 mmHg, P < 0.05) and 28th day (18.26 ± 1.41 vs. 32.22 ± 0.71 mmHg, P < 0.05). Similarly, MPAP in ADMSC-14 was also lowered on days 21 and 28. EDdR in ADMSCs-7 was increased on day 21 (pD2: 7.48 ± 0.31 vs. 4.85 ± 0.29, P < 0.05) and day 28 (6.29 ± 0.52 vs. 3.22 ± 0.61, P < 0.05). EDdR in ADMSCs-14 was also increased on day 21 (pD2: 8.08 ± 0.37 vs. 4.85 ± 0.29, P < 0.05) and day 28 (6.21 ± 0.67 vs. 3.22 ± 0.61, P < 0.05). EDiR in both ADMSCs-7 and ADMSCs-14 was increased on days 21 and 28. There was no significant difference in EDdR and EDiR between ADMSCs-EI and ADMSCs-DI. The impairment of EDdR and EdiR in PA was ameliorated, and PAH was reduced by both early and delayed transplantation of ADMSCs.

Health Span-Extending Activity of Human Amniotic Membrane- and Adipose Tissue-Derived Stem Cells in F344 Rats.

Aging brings about the progressive decline in cognitive function and physical activity, along with losses of stem cell population and function. Although transplantation of muscle-derived stem/progenitor cells extended the health span and life span of progeria mice, such effects in normal animals were not confirmed. Human amniotic membrane-derived mesenchymal stem cells (AMMSCs) or adipose tissue-derived mesenchymal stem cells (ADMSCs) (1×10(6) cells per rat) were intravenously transplanted to 10-month-old male F344 rats once a month throughout their lives. Transplantation of AMMSCs and ADMSCs improved cognitive and physical functions of naturally aging rats, extending life span by 23.4% and 31.3%, respectively. The stem cell therapy increased the concentration of acetylcholine and recovered neurotrophic factors in the brain and muscles, leading to restoration of microtubule-associated protein 2, cholinergic and dopaminergic nervous systems, microvessels, muscle mass, and antioxidative capacity. The results indicate that repeated transplantation of AMMSCs and ADMSCs elongate both health span and life span, which could be a starting point for antiaging or rejuvenation effects of allogeneic or autologous stem cells with minimum immune rejection. This study demonstrates that repeated treatment with stem cells in normal animals has antiaging potential, extending health span and life span. Because antiaging and prolonged life span are issues currently of interest, these results are significant for readers and investigators.

Transplantation of Adipose Tissue-Derived Mesenchymal Stem Cells Prevents the Development of Lupus Dermatitis.

MRL/lpr mice spontaneously develop high titers of anti-dsDNA antibodies and symptoms such as glomerular nephritis and organ weight gain. They also develop spontaneous skin inflammation similar to the cutaneous lesions common in human lupus erythematosus. This study aimed to compare the effects of long-term serial administration of human adipose tissue-derived mesenchymal stem cells (ASCs), CTLA4Ig-overexpressing ASCs, and cyclophosphamide treatment in MRL/lpr mice. MRL/lpr mice were divided into saline (C), cyclophosphamide (Y), ASC early (E), ASC late (L), and CTLA4Ig-overexpressing ASC (CT) treatment groups. Background-matched control MRL/MPJ mice treated with saline (N) were also compared. The treatment period was 5-23 weeks, except for the L group (15-23 weeks). Blood and tissue samples were collected when the mice were 24 weeks old. Organ weight, anti-dsDNA antibodies, urine protein, skin and kidney histologic abnormalities, and trabecular bone volume were evaluated. The Y group showed the greatest decrease in anti-dsDNA antibodies, organ weight, degree of kidney inflammation and glomerular infiltration of C3, and incidence rate of severe proteinuria; the E, L, and CT treatment groups showed better results than the C group. ASC transplantation reduced anti-dsDNA antibody levels significantly. Mice treated with ASCs or CTLA4Ig-ASCs starting from the early disease stage did not show dermatitis upon gross examination; they demonstrated significant improvement in hyperkeratosis, acanthosis, and inflammatory cell infiltration scores in histopathology. Micro-CT analysis revealed that cyclophosphamide treatment significantly decreased bone volume and increased bone spacing in the trabecular bone. Thus, we found that ASC and CTLA4-ASC treatments prevent lupus dermatitis development in MRL/lpr mice without adverse effects.

Treatment of Oral Ulcers in Dogs Using Adipose Tissue-Derived Mesenchymal Stem Cells

Aim:Adipose tissue Derived Mesenchymal Stem cells (ADMSCs) represent a promising tool for new clinical concepts in supporting cellular therapy. The goal of this study was to investigate the effects of ADMSCs transplantation on oral ulcer healing in dogs.Study design:Mesenchymal stem cells were isolated from adipose tissues of dogs obtained by suction-assisted lipectomy (liposuction), by dish adherence and were expanded in culture. Oral ulcers were induced by topical application of formocresol in the oral cavity of 18 dogs. The dogs were classified into 3 groups. Either autologousADMSCs, Corticosteriod (Dexamethasone) or vehicle (saline) was injected. The healing process of the ulcer was monitored histopathologically. Gene expression of vascular endothelial growth factor (VEGF),platelets derived growth factor (PDGF),epidermal growth factor (EGF) and collagen was assessed in biopsies obtained from all ulcers “as healing markers”, by real time polymerase chain reaction (PCR). Results:ADMSCs group showed significantly accelerated oral ulcer healing compared with the Dexamethasone and control groups. There was increased expression of VEGF, PDGF,EGF and collagen genes in ADMSCs-treated ulcers compared with Dexamethasone and controls. Conclusion:ADMSCs transplantation may help accelerate oral ulcer healing, possibly through the induction of angiogenesis by VEGF and PDGF, as well as epithelial and connective tissue proliferation as evidenced by increased EGF and collagen gene expression.

GW24-e0539 Effects of Rehmannia Glutinosa Oligosaccharides on Adipose Tissue- Derived Mesenchymal Stem Cells Transplantation for Treatment of post-Infarction Congestive Heart Failure in Swine

ObjectivesTo explore the method for isolation and cultivation of Adipose Tissue-Derived Mesenchymal Stem Cells (ADMSCs), and prove that ADMSCs can be induced into myocardial cells by 5-azacytidine (5-aza);To prove Rehmannia...

Human adipose tissue‐derived mesenchymal stem cells improve cognitive function and physical activity in ageing mice

Brain ageing leads to atrophy and degeneration of the cholinergic nervous system, resulting in profound neurobehavioral and cognitive dysfunction from decreased acetylcholine biosynthesis and reduced secretion of growth and neurotrophic factors. Human adipose tissue-derived mesenchymal stem cells (ADMSCs) were intravenously (1 × 10(6) cells) or intracerebroventricularly (4 × 10(5) cells) transplanted into the brains of 18-month-old mice once or four times at 2-week intervals. Transplantation of ADMSCs improved both locomotor activity and cognitive function in the aged animals, in parallel with recovery of acetylcholine levels in brain tissues. Transplanted cells differentiated into neurons and, in part, into astrocytes and produced choline acetyltransferase proteins. Transplantation of ADMSCs restored microtubule-associated protein 2 in brain tissue and enhanced Trk B expression and the concentrations of brain-derived neurotrophic factor and nerve growth factor. These results indicate that human ADMSCs differentiate into neural cells in the brain microenvironment and can restore physical and cognitive functions of aged mice not only by increasing acetylcholine synthesis but also by restoring neuronal integrity that may be mediated by growth/neurotrophic factors. © 2013 Wiley Periodicals, Inc.

Serum from hepatectomized rats induces the differentiation of adipose tissue mesenchymal stem cells into hepatocyte-like cells and upregulates the expression of hepatocyte growth factor and interleukin-6 in vitro

Adipose tissue-derived mesenchymal stem cells (AT-MSCs) are an attractive alternative for clinical application due to their minimally invasive accessibility and availability in the body. However, the hepatic differentiation efficiency of AT-MSCs is insufficient for therapeutic application and the role of extrahepatic stem cells in liver regeneration remains poorly understood. This study was designed to investigate the effects of serum from rats subjected to 70% partial hepatectomy (PH) on the differentiation ability of rat AT-MSCs invitro, and to explore the potential role of AT-MSCs invivo following PH injury. Results showed that AT-MSCs treated with serum collected from rats 24h after 70% PH differen-tiated into hepatocyte-like cells, resembled hepatocyte-like cells with round or polygonal shape, expressed α-fetoprotein, secreted albumin, synthesized urea and acquired cytochrome P450 type3A4 enzyme activity, and upregulated the expression of interleukin (IL)-6 and hepatocyte growth factor (HGF) transiently invitro, although the hepatic differentiation efficiency was extremely low. AT-MSC transplantation after 70% PH ameliorated liver injury and promoted liver regeneration, but did not increase the serum levels of IL-6 and HGF invivo. This result suggests that the therapeutic effect of AT-MSCs invivo after 24h of 70% PH does not increase IL-6 and HGF expression.