76 research outputs found
Decellularized skin pretreatment by monophosphoryl lipid A and lactobacillus casei supernatant accelerate skin recellularization
No full textBackground: Bioscaffolds and cells are two main components in the regeneration of damaged tissues via cell therapy. Umbilical cord stem cells are among the most well-known cell types for this purpose. The main objective of the present study was to evaluate the effect of the pretreatment of the foreskin acellular matrix (FAM) by monophosphoryl lipid A (MPLA) and Lactobacillus casei supernatant (LCS) on the attraction of human umbilical cord mesenchymal stem cells (hucMSC). Methods and results: The expression of certain cell migration genes was studied using qRT-PCR. In addition to cell migration, transdifferentiation of these cells to the epidermal-like cells was evaluated via immunohistochemistry (IHC) and immunocytochemistry (ICC) of cytokeratin 19 (CK19). The hucMSC showed more tissue tropism in the presence of MPLA and LCS pretreated FAM compared to the untreated control group. We confirmed this result by scanning electron microscopy (SEM) analysis, glycosaminoglycan (GAG), collagen, and DNA content. Furthermore, IHC and ICC data demonstrated that both treatments increase the protein expression level of CK19. Conclusion: Pretreatment of acellular bioscaffolds by MPLA or LCS can increase the migration rate of cells and also transdifferentiation of hucMSC to epidermal-like cells without growth factors. This strategy suggests a new approach in regenerative medicine
Antioxidant Effects of CoQ10 in Transfusion-Dependent β-Thalassemia Major Patients: Implications for Ferroptosis-Related Pathways
No full textKiavash Fekri,1 Mohammad Mehdi Mirforoughi,2 Yaser Salehinajafabadi,3 Hadi Raeisi Shahraki,4 Raziyeh Ershadi,5 Shima Rahmati1 1Cancer Research Center, Shahrekord University of Medical Sciences, Shahrekord, Iran; 2Shahid Beheshti University of Medical Sciences, Tehran, Iran; 3Clinical Biochemistry Research Center, Basic Health Sciences Institute, Shahrekord University of Medical Sciences, Shahrekord, Iran; 4Modeling in Health Research Center, Shahrekord University of Medical Sciences, Shahrekord, Iran; 5Department of Pathology, Clinical Research Development Unit, Hajar Hospital, Shahrekord University of Medical Sciences, Shahrekord, IranCorrespondence: Shima Rahmati, Cancer Research Center, Shahrekord University of Medical Sciences, Shahrekord, Iran, Email [email protected]: The role of oxidative stress and ferroptosis in the pathogenesis of thalassemia major have been established and have been shown to cause tissue damage and disease progression. The lipophilic antioxidant coenzyme Q10 (CoQ10) can protect against tissue damage by restoring antioxidant enzyme function and decreasing oxidative damage. This study evaluated the effect of CoQ10 supplementation on biomarkers of ferroptosis in patients with thalassemia major.Methods: In this single-arm pre–post study, patients with confirmed thalassemia major (48) received oral CoQ10 (100 mg/day) for 8 weeks. Peripheral blood samples were collected before and after the study period for assays to measure antioxidant enzyme activity: superoxide dismutase (SOD), catalase (CAT), and glutathione peroxidase (GPx). Statistical analyses were conducted using paired T-test and Wilcoxon.Results: CoQ10 supplementation significantly increased SOD and GPx activity compared to baseline, (p < 0.05). No significant change was seen in CAT activity. No statistically significant differences were observed in hematological parameters and ferritin level after using CoQ10.Conclusion: CoQ10 supplementation appears to exert protective effects against ferroptosis in patients with thalassemia major, primarily by enhancing antioxidant defenses. Our study findings support the hypothesis that CoQ10 may represent a potential adjunctive therapy in mitigating oxidative stress and ferroptotic damage.Keywords: coenzyme Q10, thalassemia major, ferroptosis, oxidative stress, antioxidant enzyme
Necrotic, apoptotic and autophagic cell fates triggered by nanoparticles
No full textNanomaterials have gained a rapid increase in use in a variety of applications that pertain to many aspects of human life. The majority of these innovations are centered on medical applications and a range of industrial and environmental uses ranging from electronics to environmental remediation. Despite the advantages of NPs, the knowledge of their toxicological behavior and their interactions with the cellular machinery that determines cell fate is extremely limited. This review is an attempt to summarize and increase our understanding of the mechanistic basis of nanomaterial interactions with the cellular machinery that governs cell fate and activity. We review the mechanisms of NP-induced necrosis, apoptosis and autophagy and potential implications of these pathways in nanomaterial-induced outcomes. Abbreviations: Ag, silver; CdTe, cadmium telluride; CNTs, carbon nanotubes; EC, endothelial cell; GFP, green fluorescent protein; GO, graphene oxide; GSH, glutathione; HUVECs, human umbilical vein endothelial cells; NP, nanoparticle; PEI, polyethylenimine; PVP, polyvinylpyrrolidone; QD, quantum dot; ROS, reactive oxygen species; SiO2, silicon dioxide; SPIONs, superparamagnetic iron oxide nanoparticles; SWCNT, single-walled carbon nanotubes; TiO2, titanium dioxide; USPION, ultra-small super paramagnetic iron oxide; ZnO, zinc oxide
Undifferentiated embryonal sarcoma of the liver in a 9-year-old girl
No full textUndifferentiated embryonal sarcoma of the liver (UESL) is a rare adult neoplasm. The primary treatments for UESL are total surgical resection and adjuvant multiagent chemotherapy. The current study presents a case of UESL in a 9-year-old female with abdominal pain and fever as her first symptoms. A cystic mass with solid components was discovered on sonography and computed tomography (CT) imaging. The patient underwent tumor removal surgery in addition to a liver lobectomy on the right side. The pathologist reported a single-focal cystic solid mass confined to the liver with no capsular invasion, and the final diagnosis based on the immunohistochemistry (IHC) results was UESL. The patient received chemotherapy, and she is doing well eight months after surgery with no signs of recurrence. In conclusion, large cystic hepatic lesions should be considered in the differential diagnosis. Despite the poor prognosis of UESL, aggressive surgical resection should be the most important factor in ensuring long-term survival.
Keywords: Undifferentiated embryonal sarcoma of the liver, Child, Case repor
Ovarian Sertoli cell tumor: A rare case of sex cord stromal tumor in a three-year female
No full textSertoli–Leydig cell tumors (SLCTs), also known as androblastoma, are rare, accounting for less than 1% of ovarian neoplasms. The clinical manifestations of SLCT range from asymptomatic to severe virilization. The majority of Sertoli cell tumors are highly differentiated, with homogeneous nuclei and few mitotic signs among the neoplastic cells. This study is a case report of a 3-year-old girl who was admitted to Kashani hospital with abdominal pain and a protruding stomach. On the right side of the abdomen, there was a large, lump palpable. Inhibin, calretinin, actine, and WT1 were all detected as positive by immunohistochemistry (IHC) testing. However, CD30, NSE, synaptophysin, vimentin, chromogranin, S100, and AFP were all detected to be negative. Additional information about ovarian sex cord tumors is provided in this case. Sertoli cell tumor should be considered a differential diagnosis in a young girl who has hirsutism, irregular bleeding, and breast atrophy with a pelvic mass
An Approach for Enterprise Architecture and Business Model Alignment
No full textThis research aims at bridging business model and enterprise architecture in a practical and analytical way. Exploring business model and enterprise architecture limitations and the way these limitations affect the organization showed that by bridging them an effective communication between IT and business people could be gained, responsibilities could be tracked, a road map for business model implementation could be created, and viability and feasibility of business models could be increased.Engineering and Policy AnalysisICTTechnology, Policy and Managemen
A review on different methods to increase the efficiency of mesenchymal stem cell-based wound therapy
No full textMesenchymal stem cells (MSCs) accelerate wound healing but the harsh environment of wound site limits the engraftment, retention, and survival rate of transplanted cells. There are multiple approaches that amplify the therapeutic potential of MSCs. The MSCs derived from medical waste material, provide comparable regenerative abilities compared to traditional sources. The application of different scaffolds increases MSC delivery and migration into the wound. The spheroid culture of MSC increases the paracrine effects of the entrapped cells and the secretion of pro-angiogenic and anti-inflammatory cytokines. The MSC pretreating and preconditioning enhances the cell migration, proliferation, and survival rate, which lead to higher angiogenesis, re-epithelialization, wound closure, and granulation tissue formation. Moreover, genetic modification has been performed in order to increase MSC angiogenesis, differentiation potential, as well as the cell life span. Herein, we review the results of aforementioned approaches and provide information accommodating to the continued development of MSC-based wound therapy in the future
Comparison of human acellular amniotic membranes with acellular amniotic membranes pretreated with MPLA for repair of fascia in rats
No full textA decellularized amniotic membrane matrix is an ideal scaffolding system. This study compared the effectiveness of amniotic membrane and amniotic membrane pretreated with monophosphoryl lipid A (MPLA) for repairing the fascia of the abdomen with tension sutures. A total of 24 rats were randomly divided into three groups of eight each. In the control group, the fascia was repaired only with non-absorbable monofilament yarn under tension. In the second and third groups, in addition to the control treatment, acellular amniotic membrane was used and MPLA pretreated amniotic membrane was used, respectively. At 3, 7 and 14 days after treatment, the fascia repair was examined macroscopically and microscopically in all groups. Macroscopic examination showed that the use of MPLA pretreated significantly different from the other groups only in the fibrin exudate. Changes in the fascia rupture pressure showed significant differences between groups. Group three, which was sutured with MPLA pretreated acellular membrane, showed greater amounts of collagen, monocytes and neovascularization, especially at days 7 and 14. The results show that MPLA pretreated acellular amniotic membrane helped to repair abdominal fascia to some extent
Association of p53 codon 72 Arg>Pro polymorphism and risk of cancer in Iranian population: A systematic review and meta-analysis
No full textRecellularization Of Decellularized Human Foreskin Is Enhanced By Scaffold Pretreatment With Monophosphoryl Lipid A :A Novel Approach For Enhanced Cell Migration
No full text- …
