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Calcitriol cell culture

S Cheng, W Y So, D Zhang, Q Cheng, B J Boucher, P S Leung
OBJECTIVES: The present study was designed to investigate the effects of calcitriol (the active hormonal metabolite of vitamin D) on hepatic metabolic abnormalities in type 2 diabetes. METHODS: Type 2 diabetic db/db mice were used to investigate the effects of calcitriol on hepatic and systemic metabolic disorders. HepG2 cells cultured in insulin-resistant conditions were used to examine the potential mechanisms for calcitriol-induced changes in hepatic lipid and glucose metabolism...
September 20, 2016: Current Molecular Medicine
Yovani Llamas Valle, Sami G Almalki, Devendra K Agrawal
BACKGROUND: Vitamin D, a hormone once thought to have a role limited to calcium homeostasis and bone mineralization, has pleiotropic effects on different types of cells. Vitamin D receptors are reported in vascular smooth muscle cells, endothelial cells, and cardiomyocytes. Adipose-derived MSCs (ADMSCs) are multipotent cells with the capacity to differentiate into cells of different lineages. To our knowledge, the presence of vitamin D machinery on porcine ADMSCs has not yet been examined...
2016: Stem Cell Research & Therapy
Iveta Bartonkova, Aneta Grycova, Zdenek Dvorak
Variety of xenobiotics, including therapeutically used vitamin D analogues or environmental and alimentary endocrine disruptors, may interfere with vitamin D receptor (VDR) signaling, with serious physiological or pathophysiological consequences. Therefore, it is of topical interest to have reliable and efficient in vitro screening tools for the identification of agonists and activators of human VDR. We present here two novel stably transfected human reporter cell lines allowing rapid, high-throughput, and selective identification of VDR agonists and activators...
July 18, 2016: Chemical Research in Toxicology
Francesca Uberti, Vera Morsanuto, Claudio Bardelli, Claudio Molinari
Recent studies have postulated a role for vitamin D and its receptor on cerebral function, and anti-inflammatory, immunomodulatory and neuroprotective effects have been described; vitamin D can inhibit proinflammatory cytokines and nitric oxide synthesis during various neurodegenerative insults, and may be considered as a potential drug for the treatment of these disorders. In addition, iron is crucial for neuronal development and neurotransmitter production in the brain, but its accumulation as catalytic form (Fe(3+)) impairs brain function and causes the dysregulation of iron metabolism leading to tissue damage due to the formation of toxic free radicals (ROS)...
June 2016: Physiological Reports
Yael Einbinder, Meital Ohana, Sydney Benchetrit, Tania Zehavi, Naomi Nacasch, Jacques Bernheim, Tali Zitman-Gal
BACKGROUND: Glucagon-like-peptide-1 (GLP-1) is a gut incretin hormone which stimulates insulin secretion and may affect the inflammatory pathways involved in diabetes mellitus. Calcitriol plays an important role in renal, endothelial, and cardiovascular protection. We evaluated the anti-inflammatory and histology effects of GLP-1 analogue (liraglutide) and calcitriol in a db/db mice diabetic model and in endothelial cells (EC) exposed to a diabetic-like environment. METHODS: Diabetic db/db mice were treated with liraglutide and calcitriol for 14 weeks, after which the kidneys were perfused and removed for mRNA and protein analysis and histology...
March 16, 2016: Diabetes/metabolism Research and Reviews
Jungmi Ahn, Sulgi Park, Baltazar Zuniga, Alakesh Bera, Chung Seog Song, Bandana Chatterjee
Metastatic castration-resistant prostate cancer (mCRPC) is a progressive, noncurable disease induced by androgen receptor (AR) upon its activation by tumor tissue androgen, which is generated from adrenal steroid dehydroepiandrosterone (DHEA) through intracrine androgen biosynthesis. Inhibition of mCRPC and early-stage, androgen-dependent prostate cancer by calcitriol, the bioactive vitamin D3 metabolite, is amply documented in cell culture and animal studies. However, clinical trials of calcitriol or synthetic analogs are inconclusive, although encouraging results have recently emerged from pilot studies showing efficacy of a safe-dose vitamin D3 supplementation in reducing tumor tissue inflammation and progression of low-grade prostate cancer...
2016: Vitamins and Hormones
Guoqing Wang, Lei Lei, Xixia Zhao, Jun Zhang, Min Zhou, Kejun Nan
Calcitriol (1α,25-dihydroxyvitamin D3) has demonstrated anticancer activity against several tumors. However, the underlying mechanism for this activity is not yet fully understood. Our experiment was designed and performed to address one aspect of this issue in cervical cancer. HeLa S3 cells were cultured in media with various concentrations of calcitriol. Cell proliferation and cell cycle were assessed by spectrophotometry and flow cytometry, respectively. The mRNA and protein expression levels of human cervical cancer oncogene (HCCR-1) and p21 were determined by RT-PCR and Western blot, respectively...
2014: Oncology Research
T Shintani, S N Z Rosli, F Takatsu, Y F Choon, Y Hayashido, S Toratani, E Usui, T Okamoto
We have previously reported that 1,25(OH)2D3 inhibits NF-κB activity and thus inhibits growth of OSCC cells in serum-free culture and down-regulates HBp17/FGFBP-1 expression, which is important for cancer cell growth and angiogenesis. Here, we have investigated the effects of ED-71, an analog of vitamin D3 (VD) on OSCC cell lines in serum-free culture. It is known that ED-71 has a stronger inhibitory effect on bone resorption compared to VD and other VD analogs. To the best of our knowledge, there was no report examining the potential of ED-71 as an anti-cancer agent for OSCC...
October 9, 2015: Journal of Steroid Biochemistry and Molecular Biology
Bahman Mansouri Motlagh, Nahideh Afzale Ahangaran, Seyyed Meysam Abtahi Froushani
OBJECTIVES: Some evidence showed that calcitriol has an important role in regulating growth and differentiation of mesenchymal stem cells (MSCs). However, the interaction between mesenchymal stem cells and macrophage is not clear yet. The current study was done to investigate the in vitro effects of calcitriol on the interactions between bone marrow-derived MSCs and rat macrophages. MATERIALS AND METHODS: MSCs were isolated from rat bone marrow and pulsed with different concentrations of calcitriol (50, 100 and 200 nanomolar) for 24, 48 and 72 hr...
July 2015: Iranian Journal of Basic Medical Sciences
John Reynolds, David Ray, M Yvonne Alexander, Ian Bruce
BACKGROUND: Patients with systemic lupus erythematosus (SLE) have endothelial dysfunction and increased risk of cardiovascular disease. Endothelium-dependent dilatation (ED) is abnormal in patients with SLE, and endothelial repair mechanisms are also impaired. Myeloid angiogenic cells (MACs) promote angiogenesis to restore damaged vessels. Vitamin D deficiency is associated with cardiovascular disease in the general population and is prevalent in SLE. We aimed to assess the effect of vitamin D on endothelial repair and function...
February 26, 2015: Lancet
Marcella Nebbioso, Giuseppe Buomprisco, Antonia Pascarella, Nicola Pescosolido
Many studies have shown that the presence of 1,25-dihydroxyvitamin D3 in the eye is able to modulate inflammatory responses. In fact, it has been demonstrated that topical administration of vitamin D3 inhibits Langerhans cells migration from the central cornea, corneal neovascularization, and production of cytokines (i.e. interleukin-1-6-8) in experimental animals. Moreover, both in vitro and in vivo studies have demonstrated that vitamin D is a potent inhibitor of retinal neovascularization. It has been shown that calcitriol, the biologically active form of vitamin D, inhibits angiogenesis both in cultured endothelial cells and in retinas from guinea pigs with retinoblastoma or oxygen-induced ischemic retinopathy...
June 9, 2015: Critical Reviews in Food Science and Nutrition
N M Hanafin, K S Persons, M F Holick
The human vitamin D receptor mRNA expression in preconfluent human cultured keratinocytes was upregulated by treatment of these cells with 10(-8) M 1,25(OH)2D3 for 24 hours. Additionally, human c-myc mRNA expression was decreased in a dose dependent manner by 1,25(OH)2D3 in both preconfluent and confluent cultured human keratinocytes.
March 1994: In Vitro Cellular & Developmental Biology. Animal
Youngtae Jeong, Srilatha Swami, Aruna V Krishnan, Jasmaine D Williams, Shanique Martin, Ronald L Horst, Megan A Albertelli, Brian J Feldman, David Feldman, Maximilian Diehn
The anticancer actions of vitamin D and its hormonally active form, calcitriol, have been extensively documented in clinical and preclinical studies. However, the mechanisms underlying these actions have not been completely elucidated. Here, we examined the effect of dietary vitamin D and calcitriol on mouse breast tumor-initiating cells (TICs, also known as cancer stem cells). We focused on MMTV-Wnt1 mammary tumors, for which markers for isolating TICs have previously been validated. We confirmed that these tumors expressed functional vitamin D receptors and estrogen receptors (ER) and exhibited calcitriol-induced molecular responses including ER downregulation...
August 2015: Molecular Cancer Therapeutics
Mahdi Alahgholi-Hajibehzad, Piraye Oflazer, Fikret Aysal, Hacer Durmuş, Yeşim Gülşen-Parman, Alexander Marx, Feza Deymeer, Güher Saruhan-Direskeneli
Regulatory T cells were investigated in early-onset (EO) and late-onset (LO) myasthenia gravis patients with anti-acetylcholine receptor antibody (AChR-MG). Alterations in PD-1 and PD-L1 on CD4(+)CD25(++) (Treg) and responder T cells (Tresp, CD4(+)CD25(-)) were observed in LOMG patients. GITR was decreased on CD4(+)CD25(++) of all patients. Decrease of FOXP3 was associated with lower phosphorylation of STAT5.1,25-dihydroxyvitamin D3 (VitD3) increased suppression in co-culture with a stronger effect in patients by acting possibly both on cell groups...
April 15, 2015: Journal of Neuroimmunology
E Peelen, A-H Muris, J Damoiseaux, S Knippenberg, K Broens, J Smolders, J W Cohen Tervaert, R Hupperts, M Thewissen
BACKGROUND/OBJECTIVE: Data from animal models of MS suggest that GM-CSF(+)CD4(+)T cells are pathogenic cells. Therefore, GM-CSF production by CD4(+)T cells of MS patients and their susceptibility to regulatory mechanisms were investigated. METHODS: Intracellular flowcytometry was performed to determine the GM-CSF(+)CD4(+)T cell fraction in PBMC and CSF of MS patients and controls. The effect of regulatory T cells (Tregs) on GM-CSF production by CD4(+)T cells was studied in MS patients using a proliferation-suppression assay...
March 15, 2015: Journal of Neuroimmunology
Emma S Chambers, Alexandra M Nanzer, Paul E Pfeffer, David F Richards, Peter M Timms, Adrian R Martineau, Christopher J Griffiths, Christopher J Corrigan, Catherine M Hawrylowicz
BACKGROUND: A small population of patients with severe asthma does not respond to glucocorticoids (steroid resistant [SR]). They have high morbidity, highlighting an urgent need for strategies to enhance glucocorticoid responsiveness. OBJECTIVE: We investigated the immunologic differences between steroid-sensitive (SS) and SR asthmatic patients and the effect on immunophenotype of oral calcitriol treatment because it has been previously shown to beneficially modulate the clinical response to glucocorticoids in patients with SR asthma...
September 2015: Journal of Allergy and Clinical Immunology
Hasti Atashi Shirazi, Javad Rasouli, Bogoljub Ciric, Abdolmohamad Rostami, Guang-Xian Zhang
1,25-Dihydroxyvitamin D3 (1,25(OH)2D3) has recently been found to suppress experimental autoimmune encephalomyelitis (EAE), an animal model of multiple sclerosis (MS). Although its effect was attributed to an anti-inflammatory mechanism, it is not clear whether this treatment can also directly act on neural cells to promote CNS recovery. The present study investigates the effect of various concentrations of 1,25(OH)2D3 on neural stem cell (NSC) proliferation and their differentiation to oligodendrocytes, the myelinating cells...
April 2015: Experimental and Molecular Pathology
Pavan Bhargava, Anne Gocke, Peter A Calabresi
Vitamin D deficiency is associated with increased susceptibility to multiple sclerosis (MS) and increased disease activity. Vitamin D is a potent immunomodulator but the effects of vitamin D treatment on T cell memory have not been explored. We studied the effects of 1,25-dihydroxyvitamin D3 (1,25(OH)2D3) on T cell memory in MS patients (n = 10) and healthy controls (n = 10). In vitro treatment of PBMC cultures with 1,25(OH)2D3, led to a decrease in the proportion of effector memory T cells with an increase in naïve T cells, compared to vehicle in both groups...
February 15, 2015: Journal of Neuroimmunology
Carsten Carlberg
Vitamin D3 insufficiency is associated with a number of diseases, such as cancer and autoimmune disorders. This important medical problem leads to the question, whether an insight into the genome-wide actions of the transcription factor vitamin D receptor (VDR) and its high affinity ligand 1α,25-dihydroxyvitamin D3 (1,25(OH)2D3) can help in a more global appreciation of the physiological impact of vitamin D3. Chromatin immunoprecipitation sequencing (ChIP-seq) studies in 6 human cell culture models demonstrated 1,000 to 10,000 genomic VDR binding sites per cell type that sum-up to more than 23,000 non-overlapping loci of the receptor...
February 2015: Anticancer Research
Ling-Feng Wang, Chen-Yu Chien, Chih-Feng Tai, Feng-Yu Chiang, Jeff Yi-Fu Chen
Eosinophils are important inflammatory cells involved in the pathogenesis of chronic rhinosinusitis with nasal polyps (CRSwNP). Vitamin D and its derivatives, in addition to their classic role as regulators of electrolytes homeostasis, have modulatory effects in immunological and inflammatory responses. Such properties suggest that vitamin D might also play a role in inflammatory airway diseases such as CRSwNP. In this study, we investigated the effect of vitamin D derivatives (calcitriol and tacalcitol) on the secretion of eotaxin and Regulated on Activation, Normal T Cell Expressed and Secreted (RANTES), the two major eosinophil chemoattractants, in fibroblasts derived from the polyps of Taiwanese CRSwNP patients...
February 2015: Kaohsiung Journal of Medical Sciences
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