scholarly journals Tetramethylpyrazine protects Schwann cells from ischemia-like injury and increases cell survival in cold ischemic rat nerves

2015 ◽  
Vol 51 (1) ◽  
pp. 127-141
Author(s):  
Ming-Ming Yang ◽  
Wei Huang ◽  
Dian-Ming Jiang
Keyword(s):  
Cell Viability ◽  
Cell Survival ◽  
Schwann Cells ◽  
Caspase 3 ◽  
Chinese Herb ◽  
Dependent Manner ◽  
Protective Effects ◽  
Injury Model ◽  
Nerve Model ◽  
Dose Dependent

Tetramethylpyrazine (TMP), a major active ingredient of Ligusticum wallichi Franchat extract (a Chinese herb), exhibits neuroprotective properties in ischemia. In this study, we assessed its protective effects on Schwann cells (SCs) by culturing them in the presence of oxygen glucose deprivation (OGD) conditions and measuring cell survival in cold ischemic rat nerves. In the OGD-induced ischemic injury model of SCs, we demonstrated that TMP treatment not only reduced OGD-induced cell viability losses, cell death, and apoptosis of SCs in a dose-dependent manner, and inhibited LDH release, but also suppressed OGD-induced downregulation of Bcl-2 and upregulation of Bax and caspase-3, as well as inhibited the consequent activation of caspase-3. In the cold ischemic nerve model, we found that prolonged cold ischemic exposure for four weeks was markedly associated with the absence of SCs, a decrease in cell viability, and apoptosis in preserved nerve segments incubated in University of Wisconsin solution (UWS) alone. However, TMP attenuated nerve segment damage by preserving SCs and antagonizing the decrease in nerve fiber viability and increase in TUNEL-positive cells in a dose-dependent manner. Collectively, our results indicate that TMP not only provides protective effects in an ischemia-like injury model of cultured rat SCs by regulating Bcl-2, Bax, and caspase-3, but also increases cell survival and suppresses apoptosis in the cold ischemic nerve model after prolonged ischemic exposure for four weeks. Therefore, TMP may be a novel and effective therapeutic strategy for preventing peripheral nervous system ischemic diseases and improving peripheral nerve storage.

Comparison of Effects of Curcumin and Nano-curcumin on the Survival of Human-Derived Mesenchymal Stem Cells: An Experimental Study

2020 ◽  
Vol 11 (2) ◽  
pp. 148-155
Author(s):  
Pinjari Hameeda ◽  
Sandeep Katti ◽  
Rajkishore Jammalamadugu ◽  
Kishore Bhatt ◽  
Malleswara Rao Peram ◽  
...  
Keyword(s):  
Stem Cells ◽  
Experimental Study ◽  
Mesenchymal Stem Cells ◽  
Survival Rate ◽  
Cell Viability ◽  
Cell Survival ◽  
Dependent Manner ◽  
Cell Survival Rate ◽  
Post Hoc ◽  
Dose Dependent

Aim: To evaluate and compare the effect of curcumin (CUR) and Nano-curcumin (N-CUR) on human-derived mesenchymal stem cells (MSCs) in a dose-dependent manner. Materials and Methods: An experimental study performed with putative MSCs from a total of five systemically healthy subjects with chronic periodontitis. These putative MSCs were isolated by cell culture and were further characterized and identified by colony-forming unit assay and immunocytochemical analysis using cell surface markers CD105, CD146, CD45 and CD73. The identified MSCs were treated with different doses of CUR and N-CUR, and compared with α-minimum essential medium (α -MEM) for its cell viability by performing MTT (3-[4,5-dimethylthiazol-2-yl]-2,5-diphenyl tetrazolium bromide) assay for 48 and 72 hr. The statistically analysis was performed using one-way analysis of variance (ANOVA) followed by Tukey’s post hoc test and Bonferroni’s post hoc test. Results: Compared to the α-MEM group, both CUR and N-CUR treated cells have shown significantly ( P = .029) higher survival rate at lower concentration (0.1 and 0.5 µM/L), at 48 hr incubation. However, there was no statistically significant difference between the CUR and N-CUR groups on cell survival rate at both 48 and 72 hr incubation. When compared between the concentrations of the same group, significantly higher cell viability ( P = .001) was observed at lower concentrations (0.1, 0.5 µM/L) in both test groups after incubation for 48 and 72 hr. Conclusion: Both CUR and N-CUR have a dose-dependent effect on human derived MSCs survival when incubated for 48 hr, whereas N-CUR shows increased cell survival rate even at 72 hr of incubation. Although, the cautious use of CUR and N-CUR at higher concentrations is recommended.

scholarly journals Galuteolin suppresses proliferation and inflammation in TNF-α-induced RA-FLS cells by activating HMOX1 to regulate IKKβ/NF-κB pathway

2020 ◽  
Vol 15 (1) ◽  
Author(s):  
Yin Guan ◽  
Xiaoqian Zhao ◽  
Weiwei Liu ◽  
Yue Wang
Keyword(s):  
Cell Proliferation ◽  
Caspase 3 ◽  
Inflammatory Factors ◽  
Tunel Staining ◽  
Dependent Manner ◽  
Protective Effects ◽  
Tnf Α ◽  
Apoptosis And Inflammation ◽  
Dose Dependent ◽  
Anti Inflammation

Abstract Objective Galuteolin (Galu) is a substance extracted and purified from honeysuckle. The purpose of this study was to explore the effects of Galu on the TNF-α-induced RA-FLS cells (synoviocytes) and reveal its potential molecular mechanism from the perspectives of anti-apoptosis and anti-inflammation. Methods After TNF-α stimulation, cell proliferation of RA-FLS was assessed by CCK-8 assay. TUNEL staining was used to detect the apoptosis. Western blot was used to detect the expressions of Iκκβ, p-p65, p65, p-IκB, IκB, Cleaved-caspase3, Caspase-3, Bcl-2, and Bax. HO-1 were determined by RT-PCR. The contents of pro-inflammatory cytokines IL-1β, IL-6, IL-8, and MMP-1 were determined by ELISA. Results Galu significantly suppressed cell proliferation in a dose-dependent manner. Additionally, Galu obviously promotes cell apoptosis rate of RA-FLS cells and elevated the expression levels of HO-1, caspase-3, and Bax, while reducing the expression level of Bcl-2. Furthermore, Galu apparently inhibited the levels of Iκκβ, p-p65, and p-IκB. Moreover, Galu also significantly reduced the levels of pro-inflammatory factors IL-1β, IL-6, IL-8, and MMP-1 in RA-FLS cells. Conclusion Galuteolin exerts protective effects against TNF-α-induced RA-FLS cells by inhibiting apoptosis and inflammation, which can guide the clinical use of rheumatoid arthritis.

Daratumumab Directly Induces Human Multiple Myeloma Cell Death and Acts Synergistically with Conventional and Novel Anti-Myeloma Drugs

Blood ◽  
2010 ◽  
Vol 116 (21) ◽  
pp. 3013-3013
Author(s):  
Sun-Young Kong ◽  
Xian-Feng Li ◽  
Sabikun Nahar ◽  
Weihua Song ◽  
Michel de Weers ◽  
...  
Keyword(s):  
Multiple Myeloma ◽  
Cell Death ◽  
Cell Viability ◽  
Caspase 3 ◽  
Annexin V ◽  
Dependent Manner ◽  
Cell Viability Assay ◽  
Viability Assay ◽  
Synergistic Cytotoxicity ◽  
Dose Dependent

Abstract Abstract 3013 Daratumumab is a novel fully human therapeutic CD38-specific monoclonal antibody (mAb) that is currently in phase I/II safety and dose finding clinical studies in MM. We recently demonstrated that daratumumab induces antibody dependent cytotoxicity (ADCC) and complement dependent cytotoxicity (CDC) against multiple myeloma (MM) cells (ASH Abstract #608, 2009). Significantly, daratumumab induces ADCC-mediated autologous lysis against MM patient cells. In addition, when cross-linked, daratumumab directly induces Ramos lymphoma cell death. We here studied whether daratumumab directly kills MM cells and whether daratumumab could be combined with other anti-MM drugs to further enhance its direct cytotoxicity. Direct daratumumab-induced MM cell death was determined using CellTiter-Glo luminescent cell viability assay and Annexin V/PI flow cytometry analysis, with or without goat anti-human IgG crosslinking. Following 48h incubation, daratumumab (0.1-10 μg/ml), when cross-linked, directly induced cytoxicity against dexamethasone (dex)-sensitive MM1S and dex-resistant MM1R cells, as evidenced by decreased cell viability in a dose-dependent manner. Importantly, cross-linked daratumumab increased caspase 3/7 activities in a dose-dependent fashion, as assessed by the Caspase-Glo® 3/7 luminescence assay. Furthermore, daratumumab upregulated Annexin V+ and Annexin V+/PI+ cells in freshly isolated CD138+ MM patient cells, from 7.7% to 20.6% and 10.9% to 15.4 %. Therefore, cross-linked daratumumab can directly trigger apoptosis of patient myeloma cells. Cell viability assay was further performed on MM1S cells when daratumumab (0.1, 1, 10 μg/ml) was combined with dex (0.5 and 1 μM) or bortezomib (2.5, 5, and 10 nM). Following 48–72h incubation with daratumumab, both dex and bortezomib synergistically inhibited MM cell viability, as determined by combination index (CI) < 0.5 at given combined concentrations of these drugs. Enhanced caspase 3/7 activation was also seen when daratumumab was combined with dex. To evaluate combination cytotoxicity induced by lenalidomide with daratumumab, peripheral blood mononuclear effector cells (PBMCs) from normal donors (n=2) were pretreated with lenalidomide (2 μM) for 3 days followed by daratumumab-mediated ADCC assays against MM1S cells. Using calcein-AM release measurements, lenalidomide-pretreated PBMCs further augmented daratumumab-induced MM1S cell lysis, whereas daratumumab-pretreated PBMCs did not alter ADCC. Taken together, our studies show that daratumumab directly induces MM cell death via activation of caspase 3/7 and daratumumab induced synergistic cytotoxicity with dex or bortezomib. Moreover, lenalidomide augments daratumumab-induced ADCC against MM cells. These results further support combination clinical trials of conventional and novel anti-MM drugs with daratumumab in MM. Disclosures: Weers: Genmab: Employment. Parren:Genmab: Employment. Richardson:Keryx Biopharmaceuticals: Honoraria. Munshi:Millennium Pharmaceuticals: Honoraria, Speakers Bureau. Anderson:Millennium Pharmaceuticals: Honoraria, Membership on an entity's Board of Directors or advisory committees, Research Funding, Speakers Bureau.

scholarly journals Drynaria fortunei-derived total flavonoid fraction and isolated compounds exert oestrogen-like protective effects in bone

2013 ◽  
Vol 110 (3) ◽  
pp. 475-485 ◽  
Author(s):  
Ka-Chun Wong ◽  
Wai-Yin Pang ◽  
Xin-Lun Wang ◽  
Sao-Keng Mok ◽  
Wan-Ping Lai ◽  
...  
Keyword(s):  
Chinese Herb ◽  
Osteoblastic Cell ◽  
Dependent Manner ◽  
Protective Effects ◽  
Receptor Activator ◽  
Rat Osteoblast ◽  
Flavonoid Fraction ◽  
Umr 106 ◽  
Dose Dependent ◽  
Tomography Analysis

Drynaria fortunei (Kunze) J. Sm. (DF), a Chinese herb commonly used for the treatment of bone fracture, was previously shown to exert anabolic effects on bone. However, its active ingredients as well as the mechanisms of action are far from clear. The present study aimed to characterise the bone anabolic effects of DF flavonoid fraction (DFTF) in ovariectomised (OVX) mice and to determine if DFTF and its isolated compounds exert oestrogen-like effects in rat osteoblast-like UMR-106 cells. Young OVX C57/BL6J mice were treated orally with DFTF (0·087, 0·173 or 0·346 mg/g per d), 17β-oestradiol (2 μg/g per d) or its vehicle for 6 weeks. Serum and urine samples were collected for biochemical marker analysis. Bones were collected for computed tomography analysis. UMR-106 cells were treated with DFTF and isolated compounds naringin, (2S)-5,7,3′,5′-tetrahydroxy-flavonone 7-O-neohesperidoside (compound 1) and 5,7-dihydroxychromone 7-O-neohesperidoside (compound 2). DFTF exerted dose-dependent effects in improving bone mineral densities as well as bone strength at the femur, tibia and lumbar spine L1 in OVX mice. DFTF and the three isolated compounds stimulated osteoblastic cell proliferation and alkaline phosphatase activities in a dose-dependent manner. In addition, they stimulated the ratio of osteoprotegrin and receptor-activator NF-κB ligand mRNA expression, suggesting their involvement in inhibiting osteoclastogenesis. These stimulatory effects on osteoblastic functions were abolished in the presence of oestrogen receptor (ER) antagonist, ICI 182780. The present results suggested that DFTF is effective in protecting against OVX-induced bone loss in mice, and its actions in regulating osteoblastic activities appear to be mediated by ER.

scholarly journals Galuteolin suppresses proliferation and inflammation in TNF-α-induced RA-FLS cells by activating HMOX1 to regulate IKKβ/NF-κB pathway

2020 ◽  
Author(s):  
Yin GUAN ◽  
Xiaoqian ZHAO ◽  
Weiwei LIU ◽  
Yue Wang
Keyword(s):  
Cell Proliferation ◽  
Caspase 3 ◽  
Inflammatory Factors ◽  
Tunel Staining ◽  
Dependent Manner ◽  
Protective Effects ◽  
Tnf Α ◽  
Apoptosis And Inflammation ◽  
Dose Dependent ◽  
Anti Inflammation

Abstract Objective: Galuteolin (Galu) is a substance extracted and purified from honeysuckle. The purpose of this study was to explore the effects of Galu on the TNF-α-induced RA-FLS cells (synoviocytes) and reveal its potential molecular mechanism from the perspectives of anti-apoptosis and anti-inflammation.Methods: After TNF-α stimulation, cell proliferation of RA-FLS was assessed by CCK-8 assay. TUNEL staining was used to detect the apoptosis. Western Blot was used to detect the expressions of Iκκβ, p-p65, p65, p-IκB, IκB, Cleaved-caspase3, Caspase-3, Bcl-2, and Bax. HO-1 were determined by RT-PCR. The contents of pro-inflammatory cytokines IL-1β, IL-6, IL-8 and MMP-1 were determined by ELISA.Results: Galu significantly suppressed cell proliferation in a dose-dependent manner. Additionally, Galu obviously promote cell apoptosis rate of RA-FLS cells and elevated the expression levels of HO-1, caspase-3 and Bax, while reduced the expression level of Bcl-2. Furthermore, Galu apparently inhibited the levels of Iκκβ, p-p65 and p-IκB. Moreover, Galu also significantly reduced the levels of pro-inflammatory factors IL-1β, IL-6, IL-8 and MMP-1 in RA-FLS cells. Conclusion: Galuteolin exerts protective effects against TNF-α-induced RA-FLS cells by inhibiting apoptosis and inflammation, which can guide the clinical use of rheumatoid arthritis.

Molecular Mechanism of Matrine-Induced Apoptosis in Leukemia K562 Cells

2006 ◽  
Vol 34 (06) ◽  
pp. 1095-1103 ◽  
Author(s):  
Xiao-Shan Liu ◽  
Jikai Jiang
Keyword(s):  
Cytochrome C ◽  
Caspase 3 ◽  
Chinese Herb ◽  
K562 Cells ◽  
Dependent Manner ◽  
Nih3t3 Cells ◽  
Proapoptotic Protein ◽  
General Caspase Inhibitor ◽  
Induced Apoptosis ◽  
Dose Dependent

Matrine, a low toxic alkaloid purified from the Chinese herb Kushen, has been reported to induce apoptosis in leukemia K562 cells. In this study, the mechanism underling this apoptotic event was investigated. Treatment of K562 cells with matrine resulted in inhibition of cell survival more significantly than treatment of non-cancer fibroblast NIH3T3 cells. When K562 cells were incubated with matrine in higher than 0.2 mg/ml doses for 48 hours, the apoptotic cells were increased and both poly (ADP-ribose) polymerase (PARP) and caspase-3 were cleaved in a dose dependent manner. General caspase inhibitor (z-VAD-fmk) or caspase-3 inhibitor (z-DEVD-fmk) almost completely suppressed matrine-induced apoptosis. In addition, matrine increased proapoptotic protein bax and caused the release of cytochrome C. Taken together, the results suggest that matrine induces a cytochrome C-mediated, caspase-dependent apoptosis.

scholarly journals Effect of Supplementation of Tanshinone IIA and Sodium Tanshinone IIA Sulfonate on the Anticancer Effect of Epirubicin: AnIn VitroStudy

2011 ◽  
Vol 2011 ◽  
pp. 1-9 ◽  
Author(s):  
Szu-Erh Chan ◽  
Hung-Wen Lai ◽  
Chin-Cheng Su ◽  
Shou-Jen Kuo ◽  
Su-Yu Chien ◽  
...  
Keyword(s):  
Cell Growth ◽  
Cell Viability ◽  
Antagonistic Effect ◽  
Tanshinone Iia ◽  
Dependent Manner ◽  
Protective Effects ◽  
Anticancer Effect ◽  
Sodium Tanshinone Iia Sulfonate ◽  
Induced Apoptosis ◽  
Dose Dependent

Tanshinone IIA (Tan IIA) and sodium tanshinone IIA sulfonate (STS) were found to have protective effects on cardiomyocyte against adriamycin-induced damage and may be used clinically. It is unclear whether the supplementation of STS or Tan IIA would affect the anticancer activity of anthracycline. To evaluate the effect of Tan IIA or STS on the anticancer of epirubicin, the cell viability, apoptosis, Akt expression, and uptake of epirubicin after supplementation of Tan IIA or STS in the epirubicin-treated BT-20 cells were measured and compared. Tan IIA inhibited BT-20 cell growth and induced apoptosis in a time- and dose-dependent manner. When Tan IIA was used with epirubicin, an increase of BT-20 cells apoptosis was accompanied by the decreasing phosphorylation of Akt. STS had no effect on the cell viability of BT-20 cells. However, when used with epirubicin, STS decreased the epirubicin-induced cytotoxicity and apoptosis in BT-20 cells. The antagonistic effect of STS on epirubicin-induced cytotoxicity in BT-20 cells occurred concomitantly with the reduced epirubicin uptake and the increased phosphorylation of Akt. STS decreased the uptake of epirubicin in BT-20 cells and blocked epirubicin-induced apoptosis through activation of Akt.

scholarly journals Hop-derived Xanthohumol Induces HL-60 Leukemia Cells Death

2020 ◽  
pp. 61-72
Author(s):  
M. Pacurari ◽  
H. Brown ◽  
A. Rieland
Keyword(s):  
Cell Viability ◽  
Cell Cycle Progression ◽  
Caspase 3 ◽  
Morphological Changes ◽  
Chromatin Condensation ◽  
Dependent Manner ◽  
Cycle Progression ◽  
Humulus Lupulus L ◽  
Additional Chemotherapy ◽  
Dose Dependent

Background: Acute promyelocytic leukemia (APL) affects both kids and adults, however it is more prevalent in younger population. Although APL has a favorable prognostic, patients that relapse often do not respond positively to additional chemotherapy. Therefore, there is a need to further identify ways to overcome these challenges.  Hypothesis: In this study, we examined antileukemic effects of xanthohumol (XN), a prenylated flavonoid derived from hops (Humulus lupulus L), on human promyelocytic HL-60 cells.  Materials and Methods: HL-60 cells were exposed to different concentrations of XN (μM) for 24 h. Cell viability, cell morphology, chromatin condensation, cPARP-1 level, and caspase-3 activation, and the expression of p21WAF1/Cip1 were analyzed. Results: XN reduced HL-60 cell viability in a dose-dependent manner. XN induced a dose-dependent morphological changes including cell shrinkage and blebbing, and significantly increased the number of cells with condensed chromatin. XN significantly increased the level of cPARP-1, active caspase-3, and the expression of p21WAF/CIP mRNA. Conclusion: These data indicate that XN induces HL-60 cell death by regulating cell cycle progression and apoptosis. This study suggests that XN may have antileukemic preventive effects.

scholarly journals Resveratrol attenuates mechanical compression-induced nucleus pulposus cell apoptosis through regulating the ERK1/2 signaling pathway in a disc organ culture

2018 ◽  
Vol 38 (2) ◽  
Author(s):  
Zhiwen Zhang ◽  
Feng Wen ◽  
Chengjian He ◽  
Jun Yu
Keyword(s):  
Organ Culture ◽  
Nucleus Pulposus ◽  
Cell Apoptosis ◽  
Caspase 3 ◽  
Dependent Manner ◽  
Protective Effects ◽  
Mechanical Compression ◽  
High Magnitude ◽  
Regulated Expression ◽  
Dose Dependent

Background: Nucleus pulposus (NP) cell apoptosis is a typical feature within the degenerative disc. High magnitude compression significantly promotes NP cell apoptosis. Several studies have indicated that resveratrol has protective effects on disc cell’s normal biology. Objective: The present study aims to investigate whether resveratrol can attenuate mechanical overloading-induced NP cell apoptosis in a disc organ culture. Methods: Isolated porcine discs were cultured in culture chambers of a mechanically active perfusion bioreactor and subjected to a relatively high magnitude compression (1.3 MPa at a frequency of 1.0 Hz for 2 h once per day) for 7 days. Different concentrations (50 and 100 μM) of resveratrol were added into the culture medium to observe the protective effects of resveratrol against NP cell apoptosis under mechanical compression. The noncompressed discs were used as controls. Results: Similar with the previous studies, this high magnitude compression significantly promoted NP cell apoptosis, reflected by the increased number of terminal deoxynucleotidyl transferase dUTP nick-end labeling (TUNEL) staining-positive NP cells and enzyme (caspase-9 and caspase-3) activity, the up-regulated expression of proapoptotic molecules (Bax and caspase-3/cleaved caspase-3), and down-regulated expression of antiapoptotic molecule (Bcl-2). However, resveratrol partly attenuated NP cell apoptosis under this high magnitude compression in a dose-dependent manner. Additionally, though the ERK1/2 pathway was significantly activated in the mechanical compression group, resveratrol partly attenuated activation of the ERK1/2 pathway under mechanical compression in a dose-dependent manner. Conclusion: Resveratrol attenuates mechanical overloading-induced NP cell apoptosis in a dose-dependent manner, and inhibiting activation of the ERK1/2 pathway may be one potential mechanism behind this regulatory process.

Epigallocatechin Gallate Protects against TNFα- or H2O2- Induced Apoptosis by Modulating Iron Related Proteins in a Cell Culture Model

2018 ◽  
Vol 88 (3-4) ◽  
pp. 158-165 ◽  
Author(s):  
Qi Xu ◽  
Anumantha G. Kanthasamy ◽  
Manju B. Reddy
Keyword(s):  
Oxidative Stress ◽  
Cell Viability ◽  
Caspase 3 ◽  
Epigallocatechin Gallate ◽  
Ros Generation ◽  
Dependent Manner ◽  
Protective Effects ◽  
Neuroprotective Effects ◽  
Cell Viability Assay ◽  
Hepcidin Expression

Abstract. Oxidative stress, iron dysregulation, and inflammation have been implicated in the pathogenesis of Parkinson’s disease (PD). Considering the entwined relationship among these factors, epigallocatechin gallate (EGCG) may be a good candidate for PD treatment due to its protective effects against those factors. The objective of this study is to determine whether EGCG protects N27 dopaminergic neuronal cells from H2O2 - and TNFα- induced neurotoxicity. Seven treatments were included: control, H2O2, TNFα, FeSO4, H2O2 + EGCG, TNFα + EGCG, FeSO4 + EGCG. Cells were pretreated with 10 μM EGCG, followed by 50 μM H2O2, 30 ng/ml TNFα or 50 μM FeSO4. Neuroprotective effects of EGCG were assessed by cell viability assay, caspase-3 activity, intracellular reactive oxygen species (ROS) generation, and iron related protein expressions. Caspase-3 activity was increased to 2.8 fold (P < 0.001) and 1.5 fold (P < 0.01) with H2O2 and TNFα treatment; However, EGCG pretreatment significantly decreased the caspase activity by 50.2% (P < 0.001) and 30.1% (P < 0.05). Similarly, cell viability was reduced to 69.2% (P < 0.01) and 89% (P < 0.01) by H2O2 and TNFα, which was partially blocked by EGCG pretreatment. Also, EGCG significantly (P < 0.001) protected against H2O2- induced ROS in a time dependent manner. In addition, both H2O2 and TNFα significantly (P < 0.05) upregulated hepcidin expression and marginally reduced ferroportin (Fpn) expression unlike iron treatment alone. Collectively, our results show that EGCG protects against both TNFα- and H2O2- induced neuronal apoptosis. The observed neuroprotection may be through the inhibition of oxidative stress and inflammation which is possibly mediated mainly by hepcidin and partially by Fpn.

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