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Heidari N, Sandeman S, Dymond M, Rogers C, Ostler EL, Faragher RG. Resveralogues protect HepG2 cells against cellular senescence induced by hepatotoxic metabolites. Mech Ageing Dev 2024; 219:111938. [PMID: 38744411 DOI: 10.1016/j.mad.2024.111938] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2023] [Revised: 04/12/2024] [Accepted: 04/23/2024] [Indexed: 05/16/2024]
Abstract
Progressive liver disease and dysfunction cause toxic metabolites including ammonia and unconjugated bilirubin to accumulate in plasma. As the population ages alternatives to liver transplantation become increasingly important. One approach for use as a bridge to transplant or recovery is the use of bioartificial liver systems (BALS) containing primary or immortalised hepatocytes as ex-vivo replacements or supports for endogenous liver function. However, exposure to the hepatotoxic metabolites present in plasma causes the rapid failure of these cells to carry out their primary metabolic functions despite remaining viable. Hypothesizing that this loss of core hepatocyte phenotypes was caused by cell senescence we exposed HepG2 cell populations, grown in both standard two-dimensional tissue culture systems and in three dimensional cultures on novel alginate modified HEMA-MBA cryogels, to physiologically reflective concentrations of hepatotoxic metabolites and cytokines. HepG2 cells are forced into senescence by the toxic metabolites in under six hours (as measured by loss of thymidine analog incorporation or detectable Ki67 staining) which is associated with a ten to twenty-fold reduction in the capacity of the cultures to synthesise albumin or urea. This state of senescence induced by liver toxins (SILT) can be prevented by preincubation with either 2-5 µM resveratrol, its major in vivo metabolite dihydroresveratrol or a series of novel resveralogues with differential capacities to scavenge radicals and activate SIRT1 (including V29 which does not interact with the protein). SILT appears to be a previously unrecognised barrier to the development of BALS which can now be overcome using small molecules that are safe for human use at concentrations readily achievable in vivo.
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Affiliation(s)
- Neda Heidari
- Centre for Stress and Age-related Disease, Centre for Regenerative Medicine and Devices, Huxley Building, University of Brighton, Lewes Road, Brighton, East Sussex BN2 4GJ
| | - Susan Sandeman
- Centre for Stress and Age-related Disease, Centre for Regenerative Medicine and Devices, Huxley Building, University of Brighton, Lewes Road, Brighton, East Sussex BN2 4GJ
| | - Marcus Dymond
- Centre for Stress and Age-related Disease, Centre for Regenerative Medicine and Devices, Huxley Building, University of Brighton, Lewes Road, Brighton, East Sussex BN2 4GJ
| | - Chloe Rogers
- Centre for Stress and Age-related Disease, Centre for Regenerative Medicine and Devices, Huxley Building, University of Brighton, Lewes Road, Brighton, East Sussex BN2 4GJ
| | - Elizabeth L Ostler
- Centre for Stress and Age-related Disease, Centre for Regenerative Medicine and Devices, Huxley Building, University of Brighton, Lewes Road, Brighton, East Sussex BN2 4GJ; College of Optometrists, 41-42 Craven Street, London WC2, England
| | - Richard Ga Faragher
- Centre for Stress and Age-related Disease, Centre for Regenerative Medicine and Devices, Huxley Building, University of Brighton, Lewes Road, Brighton, East Sussex BN2 4GJ.
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Niknam B, Azizsoltani A, Heidari N, Tokhanbigli S, Alavifard H, Haji Valili M, Amani D, Asadzadeh Aghdaei H, Hashemi SM, Baghaei K. A Simple High Yield Technique for Isolation of Wharton's Jelly-derived Mesenchymal Stem Cell. Avicenna J Med Biotechnol 2024; 16:95-103. [PMID: 38618506 PMCID: PMC11007369 DOI: 10.18502/ajmb.v16i2.14860] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2023] [Accepted: 09/25/2023] [Indexed: 04/16/2024] Open
Abstract
Background The isolation of Mesenchymal Stem Cells (MSCs) from various tissues is possible, with the umbilical cord emerging as a competitive alternative to bone marrow. In order to fulfill the demands of cell therapy, it is essential to generate stem cells on a clinical scale while minimizing time, cost, and contamination. Here is a simple and effective protocol for isolating MSC from Wharton's Jelly (WJ-MSC) using the explant method with various supplements. Methods Utilizing the explant method, small fragments of Wharton's jelly from the human umbilical cord were cultured in a flask. The multipotency of the isolated cells, were confirmed by their differentiation ability to osteocyte and adipocyte. Additionally, the immunophenotyping of WJ-MSCs showed positive expression of CD73, CD90, and CD105, while remaining negative for hematopoietic markers CD34 and CD45, meeting the criteria for WJ-MSC identification. Following that, to evaluate cells' proliferative capacity, various supplements, including basic Fibroblast Growth Factor (bFGF), Non-Essential amino acids (NEA), and L-Glutamine (L-Gln) were added to either alpha-Minimal Essential Medium (α-MEM) or Dulbecco's Modified Eagle's Medium-F12 (DMEM-F12), as the basic culture media. Results WJ-MSCs isolated by the explant method were removed from the tissue after seven days and transferred to the culture medium. These cells differentiated into adipocyte and osteocyte lineages, expressing CD73, CD90, and CD105 positively and CD34 and CD45 negatively. The results revealed that addition of bFGF to α-MEM or DMEMF12 media significantly increased the proliferation of MSCs when compared to the control group. However, there were no significant differences observed when NEA or LGln were added. Conclusion Although bFGF considerably enhances cell proliferation, our study demonstrates that MSCs can grow and expand when properly prepared Wharton's jelly tissues of the human umbilical cord.
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Affiliation(s)
- Bahare Niknam
- Department of Immunology, School of Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Arezou Azizsoltani
- Department of Medical Biotechnology, Faculty of Advanced Medical Sciences, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Neda Heidari
- Department of Immunology, School of Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Samaneh Tokhanbigli
- Basic and Molecular Epidemiology of Gastrointestinal Disorders Research Center, Research Institute for Gastroenterology and Liver Diseases, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Helia Alavifard
- Basic and Molecular Epidemiology of Gastrointestinal Disorders Research Center, Research Institute for Gastroenterology and Liver Diseases, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Mahsa Haji Valili
- Department of Immunology, School of Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Davar Amani
- Department of Immunology, School of Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Hamid Asadzadeh Aghdaei
- Basic and Molecular Epidemiology of Gastrointestinal Disorders Research Center, Research Institute for Gastroenterology and Liver Diseases, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Seyed Mahmoud Hashemi
- Department of Immunology, School of Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Kaveh Baghaei
- Basic and Molecular Epidemiology of Gastrointestinal Disorders Research Center, Research Institute for Gastroenterology and Liver Diseases, Shahid Beheshti University of Medical Sciences, Tehran, Iran
- Gastroenterology and Liver Diseases Research Center, Research Institute for Gastroenterology and Liver Diseases, Shahid Beheshti University of Medical Sciences, Tehran, Iran
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Heidari N, Abbasi-Kenarsari H, Niknam B, Asadirad A, Amani D, Mirsanei Z, Hashemi SM. Exosomes Derived from Heat-shocked Tumor Cells Promote In vitro Maturation of Bone Marrow-derived Dendritic Cells. Iran J Allergy Asthma Immunol 2024; 23:97-106. [PMID: 38485913 DOI: 10.18502/ijaai.v23i1.14957] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/09/2023] [Accepted: 11/24/2023] [Indexed: 03/19/2024]
Abstract
Dendritic cells (DCs), professional antigen-presenting cells that process and deliver antigens using MHC II/I molecules, can be enhanced in numerous ways. Exosomes derived from heat-shocked tumor cells (HS-TEXs) contain high amounts of heat-shock proteins (HSPs). HSPs, as chaperons, can induce DC maturation. This study aimed to investigate whether HS-TEXs can promote DC maturation. To generate DC, bone marrow-derived cells were treated with Interleukin-4 and GM-CSF. Exosomes were isolated from heat-treated CT-26 cells. The expression level of HSP in exosomes was checked by western blot and the increase in the expression of this protein was observed. Then, HS-TEXs were co-cultured with iDCs to determine DC maturity, and then DCs were co-cultured with lymphocytes to determine DC activity. Our results showed that DCs treated with HS-TEXs express high levels of molecules involved in DC maturation and function including MHCII, CD40, CD83, and CD86. HS-TEXs caused phenotypic and functional maturation of DCs. In addition, flow cytometric results reflected a higher proliferative response of lymphocytes in the iDC / Tex + HSP group. HS-TEXs could be used as a strategy to improve DC maturation and activation.
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Affiliation(s)
- Neda Heidari
- Department of Immunology, School of Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Iran.
| | - Hajar Abbasi-Kenarsari
- Department of Immunology, School of Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Iran.
| | - Bahare Niknam
- Department of Immunology, School of Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Iran.
| | - Ali Asadirad
- Department of Immunology, Faculty of Medicine, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran.
| | - Davar Amani
- Department of Immunology, School of Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Iran.
| | - Zahra Mirsanei
- Department of Immunology, School of Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Iran.
| | - Seyed Mahmood Hashemi
- Department of Immunology, School of Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Iran AND Medical Nanotechnology and Tissue Engineering Research Center, Shahid Beheshti University of Medical Sciences, Tehran, Iran.
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Hazrati A, Malekpour K, Mirsanei Z, Khosrojerdi A, Rahmani-Kukia N, Heidari N, Abbasi A, Soudi S. Cancer-associated mesenchymal stem/stromal cells: role in progression and potential targets for therapeutic approaches. Front Immunol 2023; 14:1280601. [PMID: 38022534 PMCID: PMC10655012 DOI: 10.3389/fimmu.2023.1280601] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2023] [Accepted: 10/11/2023] [Indexed: 12/01/2023] Open
Abstract
Malignancies contain a relatively small number of Mesenchymal stem/stromal cells (MSCs), constituting a crucial tumor microenvironment (TME) component. These cells comprise approximately 0.01-5% of the total TME cell population. MSC differentiation potential and their interaction with the tumor environment enable these cells to affect tumor cells' growth, immune evasion, metastasis, drug resistance, and angiogenesis. This type of MSC, known as cancer-associated mesenchymal stem/stromal cells (CA-MSCs (interacts with tumor/non-tumor cells in the TME and affects their function by producing cytokines, chemokines, and various growth factors to facilitate tumor cell migration, survival, proliferation, and tumor progression. Considering that the effect of different cells on each other in the TME is a multi-faceted relationship, it is essential to discover the role of these relationships for targeting in tumor therapy. Due to the immunomodulatory role and the tissue repair characteristic of MSCs, these cells can help tumor growth from different aspects. CA-MSCs indirectly suppress antitumor immune response through several mechanisms, including decreasing dendritic cells (DCs) antigen presentation potential, disrupting natural killer (NK) cell differentiation, inducing immunoinhibitory subsets like tumor-associated macrophages (TAMs) and Treg cells, and immune checkpoint expression to reduce effector T cell antitumor responses. Therefore, if these cells can be targeted for treatment so that their population decreases, we can hope for the treatment and improvement of the tumor conditions. Also, various studies show that CA-MSCs in the TME can affect other vital aspects of a tumor, including cell proliferation, drug resistance, angiogenesis, and tumor cell invasion and metastasis. In this review article, we will discuss in detail some of the mechanisms by which CA-MSCs suppress the innate and adaptive immune systems and other mechanisms related to tumor progression.
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Affiliation(s)
- Ali Hazrati
- Department of Immunology, School of Medicine, Tehran University of Medical Sciences, Tehran, Iran
| | - Kosar Malekpour
- Department of Immunology, School of Medicine, Iran University of Medical Sciences, Tehran, Iran
| | - Zahra Mirsanei
- Department of Immunology, School of Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Arezou Khosrojerdi
- Infectious Diseases Research Center, Birjand University of Medical Sciences, Birjand, Iran
| | - Nasim Rahmani-Kukia
- Department of Biochemistry, School of Medicine, Shiraz University of Medical Sciences, Shiraz, Iran
| | - Neda Heidari
- Department of Immunology, School of Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Ardeshir Abbasi
- Department of Immunology, Faculty of Medical Sciences, Tarbiat Modares University, Tehran, Iran
| | - Sara Soudi
- Department of Immunology, Faculty of Medical Sciences, Tarbiat Modares University, Tehran, Iran
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Hazrati A, Mirsanei Z, Heidari N, Malekpour K, Rahmani-Kukia N, Abbasi A, Soudi S. The potential application of encapsulated exosomes: A new approach to increase exosomes therapeutic efficacy. Biomed Pharmacother 2023; 162:114615. [PMID: 37011484 DOI: 10.1016/j.biopha.2023.114615] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2023] [Revised: 03/24/2023] [Accepted: 03/27/2023] [Indexed: 04/03/2023] Open
Abstract
Cell therapy is one of the methods that have shown promising results in treating diseases in recent decades. However, the use of different types of cells comes with limitations. The application of immune cells in cell therapy can lead to cytokine storms and inappropriate responses to self-antigens. Also, the use of stem cells has the potential to create tumors. Also, cells may not migrate to the injury site after intravenous injection. Therefore, using exosomes from different cells as therapeutic candidates were proposed. Due to their small size and favorable characteristics, such as biocompatibility and immunocompatibility, the easy storage and isolation, exosomes have attracted much attention. They are used in treating many diseases, including cardiovascular diseases, orthopedic diseases, autoimmune diseases, and cancer. However, the results of various studies have shown that the therapeutic efficiency of exosomes (Exo) can be increased by loading different drugs and microRNAs inside them (encapsulated exosomes). Therefore, analyzing studies investigating encapsulated exosomes' therapeutic ability is critical. In this study, we have examined the studies related to the use of encapsulated exosomes in treating diseases such as cancer and infectious diseases and their use in regenerative medicine. Compared to intact exosomes, the results show that the application of encapsulated exosomes has a higher therapeutic ability. Therefore it is suggested to use this method depending on the treatment type to increase the treatment's efficiency.
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Mirsanei Z, Heidari N, Hazrati A, Asemani Y, Niknam B, Yousefi Z, Jafari R. Oleuropein reduces LPS-induced inflammation via stimulating M2 macrophage polarization. Biomed Pharmacother 2023; 163:114857. [PMID: 37178576 DOI: 10.1016/j.biopha.2023.114857] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2023] [Revised: 05/04/2023] [Accepted: 05/06/2023] [Indexed: 05/15/2023] Open
Abstract
Oleuropein (OLEU) is the most prevalent phenolic component in olive varieties, and it has been considered for its powerful antioxidant properties in therapeutic applications. OLEU has anti-inflammatory properties and performs this property by suppressing inflammatory cells' function and reducing oxidative stress caused by various factors. This study investigated the ability of OLEU to polarize LPS-stimulated murine macrophage (MQ) cell RAW 264.7 into M1/M2 macrophages. As a first step, the cytotoxicity effects of OLEU were evaluated on LPS-stimulated RAW 264.7 cells using the thiazolyl blue (MTT) colorimetric test. Then, cytokines production, gene expression (Real-Time PCR), and functions (Nitrite oxide assay and phagocytosis assay) of OLEU-treated LPS-stimulated RAW 264.7 cells were evaluated. Our findings demonstrated that OLEU could reduce nitrite oxide (NO) production in LPS-stimulated RAW 264.7 cells by downregulating the inducible nitric oxide synthase gene expression. Furthermore, OLEU therapy decreases the expression of M1-associated pro-inflammatory cytokines production (IL-12, IFN-γ, and TNF-α) and genes expression (iNOS, TNF-α) while increasing the M2-associated anti-inflammatory gene expression and cytokines production (IL-10, and TGF-β). Based on the result, OLEU may be considered a potential therapeutic approach for inflammatory diseases due to its possible effects on oxidative stress-related factors, cytokine expression and production, and phagocytosis.
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Affiliation(s)
- Zahra Mirsanei
- Department of Immunology, School of Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Neda Heidari
- Department of Immunology, School of Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Ali Hazrati
- Department of Immunology, School of Medicine, Tehran University of Medical Sciences, Tehran, Iran
| | - Yahya Asemani
- Student Research Committee, Department of Immunology, School of Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Bahare Niknam
- Department of Immunology, School of Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Zahra Yousefi
- School of Allied Medical Sciences, Shahroud University of Medical Sciences, Shahroud, Iran
| | - Reza Jafari
- School of Allied Medical Sciences, Shahroud University of Medical Sciences, Shahroud, Iran.
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Faragher RGA, Heidari N, Ostler EL. Therapeutic Opportunities Presented by Modulation of Cellular Senescence. Subcell Biochem 2023; 102:175-193. [PMID: 36600134 DOI: 10.1007/978-3-031-21410-3_8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/17/2023]
Abstract
Cellular senescence is a permanent state of growth arrest coupled with profound changes in phenotype that can be triggered by multiple extrinsic or intrinsic stimuli. Senescence is a process-level example of the evolution of ageing mechanisms through antagonistic pleiotropy and plays a primary role in tumour suppression, although evidence is mounting for its involvement in other fundamental physiological processes. Evidence from human premature ageing diseases and from transgenic mice in which it is possible to specifically delete senescent cells is consistent with a model in which the accumulation of senescent cells through the life course is responsible for later life chronic disease and impairment. The removal of senescent cells or their reversion to a phenotypically benign state is thus an important emerging goal of translational medicine.Modern bioinformatic approaches based on text mining have compiled co-mentions of cell senescence and age-related diseases allowing an impartial ranking of the impairments most closely associated with this process. Following this schema, the evidence for the involvement of senescence in several highly ranked pathologies is reviewed, alongside potential methods for the ablation of senescent cells or their reversion to their primary phenotype with polyphenolics or inhibitors of p38 MAP kinase. Lastly, the potential for senescence to act as a barrier to the development of bioartificial organs designed to treat some of these conditions is discussed.
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Affiliation(s)
- Richard G A Faragher
- Huxley Building, School of Applied Sciences, University of Brighton, Brighton, UK.
| | | | - Elizabeth L Ostler
- Huxley Building, School of Applied Sciences, University of Brighton, Brighton, UK
- College of Optometrists, London, UK
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Eshghi F, Tahmasebi S, Alimohammadi M, Soudi S, Khaligh SG, Khosrojerdi A, Heidari N, Hashemi SM. Study of immunomodulatory effects of mesenchymal stem cell-derived exosomes in mouse model of LPS induced systemic inflammation. Life Sci 2022; 310:120938. [PMID: 36150466 DOI: 10.1016/j.lfs.2022.120938] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2022] [Revised: 08/19/2022] [Accepted: 09/04/2022] [Indexed: 11/09/2022]
Abstract
BACKGROUND Sepsis is a debilitating systemic inflammation that resulted from infection or injury. Despite many advances in treatment, the resulting mortality rate has remained high due to increasing antibiotic resistance and aging communities. The present study investigated the effects of stem cell-derived exosomes in a mouse model of LPS-induced systemic inflammation. MATERIALS AND METHODS To induce sepsis, the LPS model was used. Mice were divided into three groups: normal, patient group (LPS + PBS), and treatment group (LPS + exosome). The treatment group received an intravenous exosome 1 h after induction of the model. Patient and treatment groups were sacrificed at 4, 6, 24, and 48 h after induction of the model, and their tissues were isolated. Blood samples were taken from animal hearts to perform biochemical and immunological tests. The study results were analyzed using Graph Pad Prism software version 9. RESULTS Mesenchymal stem cell-derived exosomes decreased serum levels of ALT and AST liver enzymes, decreased neutrophil to lymphocyte ratio (NLR), and improved kidney, liver, and lung tissue damage at 4, 6, and 24 h after model induction. At 24 h, the exosomes were able to reduce serum urea levels. This study revealed decreased levels of inflammatory cytokines such as IL-6, IL-1β, and TNF-α after exosome injection. CONCLUSION Our findings suggest that treating mice with stem cell-derived exosomes can ameliorate the destructive effects of inflammation caused by sepsis by reducing inflammatory factors and tissue damage.
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Affiliation(s)
- Fateme Eshghi
- Department of Immunology, School of Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Safa Tahmasebi
- Department of Immunology, School of Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Mina Alimohammadi
- Department of Immunology, School of Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Sara Soudi
- Department of Immunology, Faculty of Medical Sciences, Tarbiat Modares University, Tehran, Iran
| | | | - Arezou Khosrojerdi
- Department of Immunology, Faculty of Medical Sciences, Tarbiat Modares University, Tehran, Iran
| | - Neda Heidari
- Department of Immunology, School of Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Seyed Mahmoud Hashemi
- Department of Immunology, School of Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Iran; Medical Nanotechnology and Tissue Engineering Research Center, Shahid Beheshti University of Medical Sciences, Tehran, Iran.
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Heidari N, Abbasi-Kenarsari H, Namaki S, Baghaei K, Zali MR, Mirsanei Z, Hashemi SM. Regulation of the Th17/Treg balance by human umbilical cord mesenchymal stem cell-derived exosomes protects against acute experimental colitis. Exp Cell Res 2022; 419:113296. [DOI: 10.1016/j.yexcr.2022.113296] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2022] [Revised: 07/15/2022] [Accepted: 07/19/2022] [Indexed: 11/04/2022]
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Torkashvand J, Rezaei Kalantary R, Heidari N, Kazemi Z, Kazemi Z, Farzadkia M, Amoohadi V, Oshidari Y. Application of ultrasound irradiation in landfill leachate treatment. Environ Sci Pollut Res Int 2021; 28:47741-47751. [PMID: 34283355 DOI: 10.1007/s11356-021-15280-9] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/02/2021] [Accepted: 06/29/2021] [Indexed: 06/13/2023]
Abstract
Landfilling is known to be the most widely used method in municipal solid waste management in many countries. Landfill leachate containing different recalcitrant compounds are recognized to contaminate the soil and water and accordingly threat both the human health and environment. A variety of chemical and biological methods have recently been employed for landfill leachate treatment, one of which is the ultrasonic process. In this review, the efficiency of the ultrasound-assisted method for leachate treatment, factors influencing the treatment process are studied by defining a search protocol. The results showed that ultrasound can reduce pollutants by creating cavitation, microstreaming, and microturbulence. Increasing turbidity in initial of irradiation time and increasing the cost of treatment are the disadvantages of using ultrasonic in leachate treatment. Moreover, ultrasound-assisted method leads to improve the leachate quality, especially the COD/BOD. Therefore, ultrasound can be considered a good pretreatment for biological processes. Although, the application of this process in combination with other treatment processes such as biological processes and advanced oxidation increases the efficiency of leachate treatment, its efficiency depends on several factors such as exploitation features and leachate quality.
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Affiliation(s)
- Javad Torkashvand
- Research Center for Environmental Health Technology, Iran University of Medical Sciences, Tehran, Iran
- Department of Environmental Health Engineering, School of Public Health, Iran University of Medical Sciences, Tehran, Iran
| | - Roshanak Rezaei Kalantary
- Research Center for Environmental Health Technology, Iran University of Medical Sciences, Tehran, Iran
- Department of Environmental Health Engineering, School of Public Health, Iran University of Medical Sciences, Tehran, Iran
| | - Neda Heidari
- Department of Environmental Health Engineering, School of Public Health, Iran University of Medical Sciences, Tehran, Iran
| | - Zohre Kazemi
- Department of Environmental Health Engineering, School of Public Health, Iran University of Medical Sciences, Tehran, Iran
| | - Zahra Kazemi
- Department of Environmental Health Engineering, School of Public Health, Iran University of Medical Sciences, Tehran, Iran
| | - Mahdi Farzadkia
- Research Center for Environmental Health Technology, Iran University of Medical Sciences, Tehran, Iran.
- Department of Environmental Health Engineering, School of Public Health, Iran University of Medical Sciences, Tehran, Iran.
| | - Vida Amoohadi
- Department of Environmental Health Engineering, School of Public Health, Iran University of Medical Sciences, Tehran, Iran
| | - Yasaman Oshidari
- Department of Environmental Health Engineering, School of Public Health, Iran University of Medical Sciences, Tehran, Iran
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Heidari N, Abbasi-Kenarsari H, Namaki S, Baghaei K, Zali MR, Ghaffari Khaligh S, Hashemi SM. Adipose-derived mesenchymal stem cell-secreted exosome alleviates dextran sulfate sodium-induced acute colitis by Treg cell induction and inflammatory cytokine reduction. J Cell Physiol 2021; 236:5906-5920. [PMID: 33728664 DOI: 10.1002/jcp.30275] [Citation(s) in RCA: 70] [Impact Index Per Article: 23.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2020] [Revised: 12/09/2020] [Accepted: 12/26/2020] [Indexed: 12/16/2022]
Abstract
Inflammatory bowel disease (IBD), including Crohn's disease and ulcerative colitis, is an inflammatory condition that results in gastrointestinal tract damage. Various factors, including environmental and genetic agents, disrupt the function of the intestinal immune system that can lead to IBD. Mesenchymal stem cells (MSCs) display an immunoregulatory function and demonstrate regenerative potential by paracrine action. In this study, we evaluated the immunomodulatory effects of MSCs' derived exosomes in the acute form of dextran sulfate sodium (DSS)-induced colitis. Exosomes were isolated from adipose-derived MSCs. Acute colitis was induced by DSS. The exosome was used by intraperitoneal injection into mice with acute colitis. Stool consistency, body weight changes, bleeding severity, colon length, and weight were examined. At the experimental endpoint (Day 7), the changes in the colon tissue were evaluated. The level of cytokines of interferon-γ (IFN-γ), tumor necrosis factor-α (TNF-α), interleukin-17 (IL-17), IL-4, IL-12, transforming growth factor-β (TGF-β) and, IL-10, and Treg cells percentage were assayed. Results showed that exosome administration diminished colon shortening, bodyweight loss, bleeding, and colon injury. The levels of IFN-γ, TNF-α, IL-12, and IL-17 were decreased, and the level of TGF-β, IL-4, and IL-10 were increased in lymph node and spleen of mice treated with exosome. Percentages of CD4+ CD25+ Foxp3+ Treg cells were grown in the lymph node and spleen of mice treated with exosomes. Overall, current data suggest that MSC-derived exosome could regulate the Treg population and improves inflammation in DSS-induced acute colitis.
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Affiliation(s)
- Neda Heidari
- Department of Immunology, School of Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Hajar Abbasi-Kenarsari
- Department of Immunology, School of Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Saeed Namaki
- Department of Immunology, School of Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Kaveh Baghaei
- Basic and Molecular Epidemiology of Gastrointestinal Disorder Research Center, Research Institute for Gastroenterology and Liver Disease, Shahid Beheshti University of Medical Science, Tehran, Iran
| | - Mohammad Reza Zali
- Gastroenterology and Liver Disease Research Center, Research Institute for Gastroenterology and Liver Disease, Shahid Beheshti University of Medical Science, Tehran, Iran
| | | | - Seyed Mahmoud Hashemi
- Department of Immunology, School of Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Iran
- Urogenital Stem Cell Research Center, Shahid Beheshti University of Medical Sciences, Tehran, Iran
- Department of Tissue Engineering and Applied Cell Sciences, School of Advanced Technologies in Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Iran
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Kalantary RR, Jamshidi A, Mofrad MMG, Jafari AJ, Heidari N, Fallahizadeh S, Hesami Arani M, Torkashvand J. Effect of COVID-19 pandemic on medical waste management: a case study. J Environ Health Sci Eng 2021; 19:831-836. [PMID: 33758671 PMCID: PMC7970745 DOI: 10.1007/s40201-021-00650-9] [Citation(s) in RCA: 31] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/29/2021] [Accepted: 03/09/2021] [Indexed: 05/09/2023]
Abstract
Covid-19 Pandemic leads to medical services for the society all over the world. The Covid-19 pandemic influence the waste management and specially medical waste management. In this study, the effect of the Covid-19 outbreak on medical waste was evaluated via assessing the solid waste generation, composition, and management status in five hospitals in Iran. The results indicated that the epidemic Covid-19 leads to increased waste generation on average 102.2 % in both private and public hospitals. In addition, the ratio of infectious waste in the studied hospitals increased by an average of 9 % in medical waste composition and 121 % compared with before COVID-19 pandemic. Changes in plans and management measurement such as increasing the frequency of waste collection per week leads to lower the risk of infection transmission from medical waste in the studied hospitals. The results obtained from the present research clearly show the changes in medical waste generation and waste composition within pandemic Covid-19. In addition, established new ward, Covid-19 ward with high-infected waste led to new challenges which should be managed properly by change in routine activities.
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Affiliation(s)
- Roshanak Rezaei Kalantary
- Research Center for Environmental Health Technology, Iran University of Medical Sciences, Tehran, Iran
- Department of Environmental Health Engineering, School of Public Health, Iran University of Medical Sciences, Tehran, IR Iran
| | - Arsalan Jamshidi
- Department of Environmental Health Engineering, School of Health and Nutrition Sciences, Yasuj University of Medical Sciences, Yasuj, Iran
| | - Mohammad Mehdi Golbini Mofrad
- IHE Delft Institute for Water Education, Delft, The Netherlands
- Environment Research Center, Research Institute for Primordial Prevention of Non-communicable Disease, Department of Environmental Health Engineering, School of Health, Isfahan University of Medical Sciences, Isfahan, Iran
| | - Ahmad Jonidi Jafari
- Research Center for Environmental Health Technology, Iran University of Medical Sciences, Tehran, Iran
- Department of Environmental Health Engineering, School of Public Health, Iran University of Medical Sciences, Tehran, IR Iran
| | - Neda Heidari
- Department of Environmental Health Engineering, School of Public Health, Iran University of Medical Sciences, Tehran, IR Iran
| | - Saeid Fallahizadeh
- Department of Environmental Health Engineering, School of Public Health, Iran University of Medical Sciences, Tehran, IR Iran
| | - Mohsen Hesami Arani
- Department of Environmental Health Engineering, School of Public Health, Iran University of Medical Sciences, Tehran, IR Iran
| | - Javad Torkashvand
- Research Center for Environmental Health Technology, Iran University of Medical Sciences, Tehran, Iran
- Department of Environmental Health Engineering, School of Public Health, Iran University of Medical Sciences, Tehran, IR Iran
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13
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Borg TM, Tahir M, Heidari N. 600 The Use of a Wide-Awake Local Anaesthesia No Tourniquet (WALANT) Technique in Foot and Ankle Procedures - A Randomised Control Trial. Br J Surg 2021. [PMCID: PMC8135748 DOI: 10.1093/bjs/znab134.456] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Introduction Wide awake local anaesthesia no tourniquet (WALANT) is a widely used technique in upper limb procedures that has gained increasing popularity during the coronavirus pandemic. The benefit of WALANT for foot and ankle surgeries is less clear, especially in patients with multiple comorbities. The primary aim of this study was to compare post-operative pain levels in patients undergoing ankle fracture fixation. Secondary objectives included comparison of intra-operative patient experiences, clinical outcomes, and patient satisfaction 1-year post-procedure. Method 129 patients presenting with ankle fractures were enrolled in a multicenter randomised control trial from February 2016 to January 2020. Patients with medial malleolar, lateral malleolar, bimalleolar or trimalleolar fractures received either WALANT (62 patients) or spinal anaesthesia (67 patients). A 5ml solution of 0.9% saline and 2% lidocaine with 1: 100,000 adrenaline was used for WALANT. Results Compared to patients who received spinal anaesthesia, those in the WALANT group experienced less post-operative discomfort and were more satisfied 1-year post-procedure (p-value = 0.003). Surgical outcomes were similar for both groups. Cost analysis revealed that WALANT is significantly more economical. Conclusions WALANT is an effective and safe anaesthetic for foot and ankle procedures. Without use of a tourniquet, it reduces post-operative pain and so, eases patient recovery.
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Affiliation(s)
- T M Borg
- Queen's Hospital, London, United Kingdom
- Barts and the London, London, United Kingdom
| | - M Tahir
- Royal London Hospital, London, United Kingdom
| | - N Heidari
- Royal London Hospital, London, United Kingdom
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14
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Abbasi-Kenarsari H, Heidari N, Baghaei K, Amani D, Zali MR, Gaffari Khaligh S, Shafiee A, Hashemi SM. Synergistic therapeutic effect of mesenchymal stem cells and tolerogenic dendritic cells in an acute colitis mouse model. Int Immunopharmacol 2020; 88:107006. [PMID: 33182049 DOI: 10.1016/j.intimp.2020.107006] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2020] [Revised: 08/24/2020] [Accepted: 09/10/2020] [Indexed: 02/07/2023]
Abstract
Cell-based therapy with tolerizing cells has been applied for the treatment of inflammatory bowel disease (IBD) in previous experimental and clinical studies with promising results. In the current study, we utilized the dextran sulfate sodium (DSS)-induced colitis model, to investigate if tolerogenic dendritic cell-mesenchymal stem cell (tDC-MSC) combination therapy can augment the therapeutic effects of single transplantation of each cell type. The effect of MSC and tDC co-transplantation on the severity of colitis was assessed by daily monitoring of body weight, stool consistency, and rectal bleeding, and compared with control groups. Moreover, the colon length, colon weight, myeloperoxidase (MPO) activity were measured and evaluated with histological analysis of colon tissues. The Treg cell percentage and cytokine levels in spleens and mesenteric lymph nodes (MLNs) were measured by flow cytometry and ELISA, respectively. The results showed co-transplantation of MSCs and tDCs was more effective in alleviating the clinical and histological manifestations of colitis than monotherapy, especially when compared with MSC alone. The protective effects of tDC-MSC were accompanied by the induction of Treg cells and increased the production of anti-inflammatory cytokines in spleens and mesenteric lymph nodes. Together, co-transplantation of MSCs and tDCs could be a promising and effective therapeutic approach in the treatment of IBD.
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Affiliation(s)
- Hajar Abbasi-Kenarsari
- Department of Immunology, School of Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Neda Heidari
- Department of Immunology, School of Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Kaveh Baghaei
- Basic and Molecular Epidemiology of Gastrointestinal Disorder Research Center, Research Institute for Gastroenterology and Liver Disease, Shahid Beheshti University of Medical Science, Tehran, Iran
| | - Davar Amani
- Department of Immunology, School of Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Mohammad Reza Zali
- Gastroenterology and Liver Disease Research Center, Research Institute for Gastroenterology and Liver Disease, Shahid Beheshti University of Medical Science, Tehran, Iran
| | | | - Abbas Shafiee
- UQ Diamantina Institute, Translational Research Institute, The University of Queensland, Brisbane, QLD 4102, Australia
| | - Seyed Mahmoud Hashemi
- Department of Immunology, School of Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Iran; Urogenital Stem Cell Research Center, Shahid Beheshti University of Medical Sciences, Tehran, Iran; Department of Tissue Engineering and Applied Cell Sciences, School of Advanced Technologies in Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Iran.
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15
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Mirdoraghi M, Einor D, Baghal Asghari F, Esrafili A, Heidari N, Mohammadi AA, Yousefi M. Assess the annual effective dose and contribute to risk of lung cancer caused by internal radon 222 in 22 regions of Tehran, Iran using geographic information system. J Environ Health Sci Eng 2020; 18:211-220. [PMID: 32399233 PMCID: PMC7203366 DOI: 10.1007/s40201-020-00454-3] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/16/2019] [Accepted: 02/05/2020] [Indexed: 06/11/2023]
Abstract
Radon gas is one of the most influential sources of indoor exposure. All its physical properties together make it a significant risk factor for lung cancer in the population. The research aims are outlined as (1) to measure the radon concentration in Tehran city and compare results with the international standards (2) to determine spatial distribution of radon gas concentration using Geographical Information System (GIS) software and (3) to estimate the annual effective dose and potential risk of lung cancer by radon-222 in Tehran city. In this study, 800 Alpha Track detectors were installed in houses in 22 regions of Tehran city and retrieved after 3 months. The measurements were repeated for spring and summer and autumn seasons. The annual effective dose and risk of lung cancer were assessed using standard equations. Data were analyzed using SPSS 20. Result showed the minimum and maximum radon concentration were observed in and Ghalee-kobra (0.13 Bq.m-3) and Charbagh-ponak district (661.11 Bq.m-3) respectively. There was no observed relationship between radon concentration and houses' model, cracking condition and constructionn materials. Expectedly, the storehouses and basements had significantly higher (P = 0.016) radon concentration than occupied rooms. The min and max of the estimated annual effective dose were 0.65 and 2.03 mSv, respectively. Result showed that around 5% of the sampling sites had higher level of radon than the maximum allowed by EPA. A rough estimation of the expected radon-attributed lung cancer incidences yielded approximately 5958 cases in the total population of Tehran every year. In view of the growing trend in cancer incidences, appropriate measures addressing radon should be undertaken in areas of increased exposure to this noble gas.
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Affiliation(s)
- Mohammad Mirdoraghi
- Department of Radiology and Radiotherapy, School of Allied Medicine, Tehran University of Medical Sciences, Tehran, Iran
| | - Daniel Einor
- Department of Biological Sciences, University of South Carolina, Columbia, SC USA
| | - Farzaneh Baghal Asghari
- Department of Environmental Health Engineering, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran
| | - Ali Esrafili
- Department of Environmental Health Engineering, School of Public Health, Iran University of Medical Sciences, Tehran, Iran
| | - Neda Heidari
- Department of Environmental Health Engineering, School of Public Health, Iran University of Medical Sciences, Tehran, Iran
| | - Ali Akbar Mohammadi
- Department of Environmental Health Engineering, Neyshabur University of Medical Sciences, Neyshabur, Iran
| | - Mahmood Yousefi
- Department of Environmental Health Engineering, School of Public Health, Iran University of Medical Sciences, Tehran, Iran
- Student Research Committee, Iran University of Medical Sciences, Tehran, Iran
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16
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Jeyaseelan L, Malagelada F, Parker L, Panagopoulos A, Heidari N, Vris A. Intra-Operative 3-Dimensional Imaging (O-arm) in Foot and Ankle Trauma Surgery: Report of 2 Cases and Review of the Literature. Open Orthop J 2019. [DOI: 10.2174/1874325001913010189] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/22/2023] Open
Abstract
Background:
Intraoperative two-dimensional (2D) fluoroscopy is the standard imaging modality available to orthopaedic surgeons worldwide. It is well-accepted, however, multiplanar 3 dimensional (3D) CT scanning is superior to 2D imaging for visualising joint surfaces and is now a fundamental feature of the pre-operative planning of intra-articular fractures.
Objective:
We present two cases in which the use of 3D intraoperative imaging and the O-arm® (Medtronic, Minneapolis, USA) led to immediate intraoperative revision to optimise fixation and articular congruity. A review of the current literature is also provided.
Methods:
During the trial period of the O-arm at our major trauma centre, intra-operative imaging was used in the lower limb trauma setting. The O-arm was used intra-operatively in a comminuted pilon fracture and a displaced talus fracture. We recorded all the intra-operative events, including quality of reduction, implant positioning and operation time. Each patient was followed-up for 12 months post-operation and was finally assessed with x-rays and the AOFAS score.
Results:
In both the cases, either fracture reduction or the implant position/usage that was observed with 2D fluoroscopy was revised following a 3D intra-operative scan. No postoperative complications were noted and the healing process was uneventful. X-rays at the final follow-up were excellent and acceptable for the talus and pilon fracture, respectively, with corresponding clinical results and AOFAS score.
Conclusion:
Although frequently used in spinal surgery, to the best of our knowledge, the use of intra-operative 3D techniques in lower limb trauma is sparse and sporadically reported. We present our cases in which the most current innovative imaging techniques influenced intra-operative outcomes without compromising patient safety. We feel that this is a real example of how innovation can positively influence patient care.
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Bagshaw H, Sonn G, Fan R, Ghanouni P, Loening A, Heidari N, Von Eyben R, Thong A, Buyyounouski M. Is A Systematic Transrectal Ultrasound-Guided Biopsy Required When a Targeted Magnetic Resonance Imaging-Ultrasound Fusion Biopsy is Performed? Int J Radiat Oncol Biol Phys 2019. [DOI: 10.1016/j.ijrobp.2019.06.1869] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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18
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Buyyounouski M, Bagshaw H, Heidari N, Pollack A, Stoyanova R, Horwitz E, Morton G, Kishan A, Scheinker D, Martinez A. A Patient-Centric, Systematic, Quantitative, and Visual Approach to Prostate Cancer Treatment Decision Making. Int J Radiat Oncol Biol Phys 2019. [DOI: 10.1016/j.ijrobp.2019.06.125] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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19
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Heidari N, Bagshaw H, Diehn M, Snyder M, Buyyounouski M. Molecular Profiling of Oligometastases and Artificial Intelligence-based Model for Predicting Treatment Outcome in Advance Prostate Cancer. Int J Radiat Oncol Biol Phys 2019. [DOI: 10.1016/j.ijrobp.2019.05.057] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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20
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Soleimani A, Heidari N, Habibi MR, Kiabi FH, Khademloo M, Emami Zeydi A, Sohrabi FB. Comparing Hemodynamic Responses to Diazepam, Propofol and Etomidate During Anesthesia Induction in Patients with Left Ventricular Dysfunction Undergoing Coronary Artery Bypass Graft Surgery: a Double-blind, Randomized Clinical Trial. Med Arch 2018; 71:198-203. [PMID: 28974833 PMCID: PMC5585810 DOI: 10.5455/medarh.2017.71.198-203] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022] Open
Abstract
Background: Anesthesia induction is often accompanied by a period of hemodynamic instability, which could be deleterious in patients with coronary artery disease (CAD) and left ventricular dysfunction undergoing coronary artery bypass graft (CABG) surgery. The aim of this study was to compare the hemodynamic responses to propofol, etomidate, and diazepam following anesthesia induction, laryngoscopy and intubation in CABG surgery patients with low ejection fraction (EF). Methods: A double-blind randomized, clinical study was performed on 150 patients with CAD and left ventricular dysfunction (EF≤35%) scheduled for elective CABG surgery with Cardiopulmonary bypass (CPB). Patients were randomly allocated to three groups A, B, and C. These patients received propofol, etomidate or diazepam at induction of anesthesia, respectively. Hemodynamic variables (systolic and diastolic blood pressure [SBP, DBP], mean arterial pressure [MAP] and heart rate [HR]) were measured and recorded at baseline, immediately before laryngoscopy and tracheal intubation and one and three minutes after intubation. Result: One minute after induction and before laryngoscopy, there was a statistically significant decrease from the baseline in SBP, DBP and MAP in all three groups, but these variables in each hemodynamic parameters in diazepam group were less than other two groups (p<0.001). Moreover, the mean HR decreased in patients receiving propofol and etomidate one minute after induction and before laryngoscopy, but did not decreased in the diazepam group (p=0.005). Conclusion: The present study showed that in patients undergoing CABG surgery with low EF, diazepam is more favorable in terms of hemodynamic stability compared to propofol and etomidate and this drug can be used safely for induction of anesthesia in patients with impaired ventricular function.
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Affiliation(s)
- Aria Soleimani
- Department of Anesthesiology, Faculty of Medicine, Mazandaran University of Medical Sciences, Sari, Iran
| | - Neda Heidari
- Student Research Committee, Faculty of Para-medicine, Mazandaran University of Medical Sciences, Sari, Iran.,School of Pharmacy and Bimolecular Sciences, University of Brighton, Brighton, East Sussex, United Kingdom
| | - Mohammad Reza Habibi
- Department of Anesthesiology, Faculty of Medicine, Mazandaran University of Medical Sciences, Sari, Iran
| | - Farshad Hasanzadeh Kiabi
- Department of Anesthesiology, Faculty of Medicine, Mazandaran University of Medical Sciences, Sari, Iran
| | - Mohammad Khademloo
- Department of Community Medicine, Faculty of Medicine, Mazandaran University of Medical Sciences, Sari, Iran
| | - Amir Emami Zeydi
- Student research committee, PhD candidate, School of Nursing and Midwifery, Mashhad University of Medical Sciences, Mashhad, Iran
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Abstract
Aims The management of a significant bony defect following excision of a diaphyseal atrophic femoral nonunion remains a challenge. We present the outcomes using a combined technique of acute femoral shortening, stabilized with a long retrograde intramedullary nail, accompanied by bifocal osteotomy compression and distraction osteogenesis with a temporary monolateral fixator. Patients and Methods Eight men and two women underwent the ‘rail and nail’ technique between 2008 and 2016. Proximal locking of the nail and removal of the external fixator was undertaken once the length of the femur had been restored and prior to full consolidation of the regenerate. Results The mean lengthening was 7 cm (3 to 11). The external fixator was removed at a mean of 127 days (57 to 220). The mean bone healing index was 28 days/cm and the mean external fixation index was 20 days/cm (11 to 18). There were no superficial or deep infections. Conclusion This small retrospective study shows encouraging results for a combined technique, enabling compression of the femoral osteotomy, alignment, and controlled lengthening. Removal of the fixator and proximal locking of the nail reduces the risk of complications and stabilizes the femur with the maximum working length of the nail. Cite this article: Bone Joint J 2018;100-B:634–9.
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Affiliation(s)
- K. Davda
- Limb Reconstruction Unit, Royal National
Orthopaedic Hospital, London, UK
| | - N. Heidari
- The Royal London Hospital, Whitechapel, London, UK
| | - P. Calder
- Limb Reconstruction Unit, Royal National
Orthopaedic Hospital, London, UK
| | - D. Goodier
- Limb Reconstruction Unit, Royal National
Orthopaedic Hospital, London, UK
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22
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Ghiasvand AR, Heidari N, Abdolhosseini S, Hamdi A, Haddad PR. Evaluation of a cooling/heating-assisted microextraction instrument using a needle trap device packed with aminosilica/graphene oxide nanocomposites, covalently attached to cotton. Analyst 2018; 143:2632-2640. [DOI: 10.1039/c8an00063h] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
Evaluation of the first commercial sample of a cooling/heating-assisted microextraction instrument.
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Affiliation(s)
| | - N. Heidari
- Department of Chemistry
- Lorestan University
- Khoramabad
- Iran
| | | | - A. Hamdi
- Department of Chemistry
- Lorestan University
- Khoramabad
- Iran
| | - P. R. Haddad
- Australian Centre for Research on Separation Science
- School of Physical Sciences
- University of Tasmania
- Hobart
- Australia
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King A, Ball N, Heidari N, Hughes A. Fine wire frame foot plate positioning. Ann R Coll Surg Engl 2017; 100:341-342. [PMID: 29046087 DOI: 10.1308/rcsann.2017.0150] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Affiliation(s)
- A King
- Royal Devon and Exeter NHS Foundation Trust , Exeter , UK
| | - N Ball
- Royal Orthopaedic Hospital NHS Foundation Trust , Birmingham , UK
| | | | - A Hughes
- Royal Devon and Exeter NHS Foundation Trust , Exeter , UK
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24
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Vris A, Vaghela KR, Heidari N. The double bend guidewire technique in intramedullary nailing. Ann R Coll Surg Engl 2017; 99:505. [PMID: 28379041 DOI: 10.1308/rcsann.2017.0033] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Affiliation(s)
- A Vris
- Department of Trauma and Orthopaedic Surgery, Royal London Hospital , Whitechapel , London, UK
| | - K R Vaghela
- Department of Trauma and Orthopaedic Surgery, Royal London Hospital , Whitechapel , London, UK
| | - N Heidari
- Department of Trauma and Orthopaedic Surgery, Royal London Hospital , Whitechapel , London, UK
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25
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Hughes A, Heidari N, Mitchell S, Livingstone J, Jackson M, Atkins R, Monsell F. Computer hexapod-assisted orthopaedic surgery provides a predictable and safe method of femoral deformity correction. Bone Joint J 2017; 99-B:283-288. [DOI: 10.1302/0301-620x.99b2.bjj-2016-0271.r1] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/11/2016] [Accepted: 09/26/2016] [Indexed: 11/05/2022]
Abstract
Aims Computer hexapod assisted orthopaedic surgery (CHAOS), is a method to achieve the intra-operative correction of long bone deformities using a hexapod external fixator before definitive internal fixation with minimally invasive stabilisation techniques. The aims of this study were to determine the reliability of this method in a consecutive case series of patients undergoing femoral deformity correction, with a minimum six-month follow-up, to assess the complications and to define the ideal group of patients for whom this treatment is appropriate. Patients and Methods The medical records and radiographs of all patients who underwent CHAOS for femoral deformity at our institution between 2005 and 2011 were retrospectively reviewed. Records were available for all 55 consecutive procedures undertaken in 49 patients with a mean age of 35.6 years (10.9 to 75.3) at the time of surgery. Results Patients were assessed at a mean interval of 44 months (6 to 90) following surgery. The indications were broad; the most common were vitamin D resistant rickets (n = 10), growth plate arrest (n = 6) and post-traumatic deformity (n = 20). Multi-planar correction was required in 33 cases. A single level osteotomy was performed in 43 cases. Locking plates were used to stabilise the osteotomy in 33 cases and intramedullary nails in the remainder. Complications included two nonunions, one death, one below-knee deep vein thrombosis, one deep infection and one revision procedure due to initial under-correction. There were no neurovascular injuries or incidence of compartment syndrome. Conclusion This is the largest reported series of femoral deformity corrections using the CHAOS technique. This series demonstrates that precise intra-operative realignment is possible with a hexapod external fixator prior to definitive stabilisation with contemporary internal fixation. This combination allows reproducible correction of complex femoral deformity from a wide variety of diagnoses and age range with a low complication rate. Cite this article: Bone Joint J 2017;99-B:283–8.
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Affiliation(s)
- A. Hughes
- Alfred Hospital, 55
Commercial Road, Melbourne, Australia
| | - N. Heidari
- Royal London Hospital, Whitechapel
Road, London, UK
| | - S. Mitchell
- University Hospitals Bristol NHS Trust, Bristol
Royal Infirmary, Upper Maudlin Street, Bristol
BS2 8HW, UK
| | - J. Livingstone
- University Hospitals Bristol NHS Trust, Bristol
Royal Infirmary, Upper Maudlin Street, Bristol
BS2 8HW, UK
| | - M. Jackson
- University Hospitals Bristol NHS Trust, Bristol
Royal Infirmary, Upper Maudlin Street, Bristol
BS2 8HW, UK
| | - R. Atkins
- University Hospitals Bristol NHS Trust, Bristol
Royal Infirmary, Upper Maudlin Street, Bristol
BS2 8HW, UK
| | - F. Monsell
- University Hospitals Bristol NHS Trust, Bristol
Royal Hospital for Children, Upper Maudlin
Street, Bristol, UK
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Williams D, Singh J, Heidari N, Ahmad M, Noorani A, Di Mascio L. Assessment of penetration of dorsal screws after fixation of the distal radius using ultrasound: cadaveric study. Ann R Coll Surg Engl 2016; 98:138-42. [PMID: 26829667 DOI: 10.1308/rcsann.2016.0045] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
INTRODUCTION Volar locking plates are used to treat unstable and displaced fractures of the distal radius. Potential advantages of stable anatomical reduction (eg early mobilisation) can be limited by penetration of dorsal screws, leading to synovitis and potential rupture of extensor tendons. Despite intraoperative imaging, penetration of dorsal screws continues to be a problem in volar plating of the distal radius. Ultrasound is a well recognised, readily available, diagnostic tool used to assess soft-tissue impingement by orthopaedic hardware. In this cadaveric study, we wished to ascertain the sensitivity and specificity of ultrasound for identification of protrusion of dorsal screws after volar plating of the distal radius. METHODS Four adult, unpaired phenol-embalmed cadaveric distal radii were used. A VariAx™ Distal Radius Volar Locking Plate system (Stryker, Kalamazoo, MI, USA) was employed for instrumented fixation. A portable SIUI CTS 900 ultrasound machine (Providian Medical, Eastlake, OH, USA) was used to image the dorsal cortex to ascertain screw penetration. RESULTS Specificity and sensitivity of ultrasound for detection of screw protrusion through the dorsal cortex was 100%. CONCLUSIONS Ultrasound was found to be a safe and accurate method for assessment of dorsal-screw penetration through the dorsal cortex of the radius after volar plating of the distal radius. It also aids diagnosis of associated tendon disorders (eg tenosynovitis) that might cause pain and limit wrist function.
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Affiliation(s)
- D Williams
- The Royal London Hospital , Barts Health NHS Trust & Queen Mary University of London , UK
| | - J Singh
- The Royal London Hospital , Barts Health NHS Trust & Queen Mary University of London , UK
| | - N Heidari
- The Royal London Hospital , Barts Health NHS Trust & Queen Mary University of London , UK
| | - M Ahmad
- The Royal London Hospital , Barts Health NHS Trust & Queen Mary University of London , UK
| | - A Noorani
- The Royal London Hospital , Barts Health NHS Trust & Queen Mary University of London , UK
| | - L Di Mascio
- The Royal London Hospital , Barts Health NHS Trust & Queen Mary University of London , UK
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Heidari N, Saki N, De Filippis L, Shahjahani M, Teimouri A, Ahmadzadeh A. Central nervous system niche involvement in the leukemia. Clin Transl Oncol 2015; 18:240-50. [DOI: 10.1007/s12094-015-1370-3] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2015] [Accepted: 07/20/2015] [Indexed: 12/25/2022]
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Prasad AK, Rashid M, Heidari N. The novel use of an external fixator connecting rod and synthetic bone substitute to achieve anatomic reduction of depressed tibial plateau fracture fragments. Ann R Coll Surg Engl 2014; 97:78. [PMID: 25519280 DOI: 10.1308/rcsann.2015.97.1.78] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
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Sabah SA, Singh J, Heidari N. Optimisation of intramedullary nail alignment. Ann R Coll Surg Engl 2014; 96:166. [PMID: 24780684 DOI: 10.1308/rcsann.2014.96.2.166a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
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Gänsslen A, Hildebrand F, Heidari N, Weinberg AM. Pelvic ring injuries in children. Part II: Treatment and results. A review of the literature. Acta Chir Orthop Traumatol Cech 2013; 80:241-249. [PMID: 24119471] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Affiliation(s)
- A Gänsslen
- Klinik für Unfallchirurgie, Orthopädie und Handchirurgie, Klinikum der Stadt Wolfsburg, Wolfsburg, Germany
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Gänsslen A, Hildebrand F, Heidari N, Weinberg AM. Acetabular fractures in children: a review of the literature. Acta Chir Orthop Traumatol Cech 2013; 80:10-14. [PMID: 23452416] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
Injury to the acetabular growth plate is rare. Accordingly, data on the incidence in the literature are controverse. Other difficulties include the clear definition of a pediatric acetabular injury. The modified classification according to Salter-Harris described by Bucholz is used in immature patients. The majority of these injuries can be treated conservatively. In severely displaced injuries or in the presence of intra-articular pathologies open procedures are recommended. The main long-term complication is the development of posttraumatic acetabular dysplasia which should be early detected by regular check-ups until the completion of growth. Overall, the long-term results are satisfactory.
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Affiliation(s)
- A Gänsslen
- Klinik für Unfallchirurgie, Orthopädie und Handchirurgie, Klinikum der Stadt Wolfsburg, Wolfsburg, Germany
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Heidari N, Riemer B. Removal of AO unreamed tibial nail with a threaded rod from the Taylor Spatial Frame. Ann R Coll Surg Engl 2012. [PMID: 23131234 PMCID: PMC3954291 DOI: 10.1308/003588412x13373405387096b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Affiliation(s)
- N Heidari
- University Hospitals Bristol NHS Foundation Trust, UK.
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Affiliation(s)
- N Heidari
- University Hospitals Bristol NHS Foundation Trust, UK
| | - B Riemer
- University Hospitals Bristol NHS Foundation Trust, UK
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Heidari N, Clement H, Kosuge D, Grechenig W, Tesch NP, Weinberg AM. Is sparing the pronator quadratus muscle possible in volar plating of the distal radius? J Hand Surg Eur Vol 2012; 37:402-6. [PMID: 22067296 DOI: 10.1177/1753193411424706] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
We measured the length of the distal radius that can be exposed by mobilizing the distal edge of pronator quadratus (PQ) without detaching its radial attachment. Measurements were made in 20 cadaveric upper limbs from the distal margin of the radius in line with the scaphoid and lunate fossae to the distal margin of the PQ, before and after mobilization of the muscle from its distal attachment. The mean distance from the distal edge of the PQ to the scaphoid fossa was 13.1 mm and to the lunate fossa was 10.7 mm. This increased to a mean of 26.2 mm for the scaphoid and a mean of 23.8 mm for the lunate fossa following mobilization of PQ. Subperiosteal retrograde release of the PQ from its distal margin will allow for the placement of a volar plate and insertion of locking peri-articular screws in the great majority of volar locking plate systems on the market.
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Affiliation(s)
- N Heidari
- Department of Traumatology, Medical University of Graz, Graz, Austria.
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Dastjerdi R, Mojtahedi MRM, Heidari N. Developing chromic dyeable PET nanocomposites: The dye absorption and complex formation mechanisms. J Appl Polym Sci 2012. [DOI: 10.1002/app.36694] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Gänsslen A, Hildebrand F, Heidari N, Weinberg AM. Pelvic ring injuries in children. Part I: Epidemiology and primary evaluation. A review of the literature. Acta Chir Orthop Traumatol Cech 2012; 79:493-498. [PMID: 23286680] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
Pediatric pelvic injury is of major significance despite these injuries in children are rare with a suspected yearly rate of 3% of all pelvic injuries. The special pediatric bone anatomy of the pelvis is responsible for different fracture patterns, and overall, a bony or joint injury of the pelvis is an indicator of a severe trauma. The vast majority of pediatric pelvic fractures is the result of a high-energy trauma, especially after strucking by a car or injured as motor vehicle passengers. Additional injuries are common, but additional head injury is only present in 1/3 of patients. An adequate structured primary diagnosis must therefore be mandatory. The a.p. X-ray of the pelvis is still the gold standard to evaluate these injuries. The majority of injuries is mechanically stable with 85-90% expected type A- and B-injuries. Primary management of these injuries is orientated to that of adults. The standard emergency fixation procedure is the external fixator. Definitive treatment depends on the displacement of fractures and the instability of the pelvic ring. In displaced and unstable fractures, today, anatomic reconstruction of the pelvic ring by osteosynthesis is favoured. Due to the potential negative long term consequences of mal-healing child-adapted stabilization techniques should be used. Moratlity is related to concomitant injuries, e.g. severe head injury. Risk factors of mortality are the overall injury severity, additional complex pelvic trauma and the type of pelvic fracture. Nevertheless, growth disturbances occur in rare cases. Therefore, frequent clinical and radiological controls are proposed until the completion of growth. Overall, good and excellent long-term results can be expected in most patients, especially after type A-injuries. But several long-term sequelae can occur in unstable pelvic injuries depending on the instability of the child's pelvis at the time of injury. Overall, there is a good correlation between the clinical and radiological result. Risk factors for a worse result can be additional significant peripelvic injuries (complex pelvic trauma).
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Affiliation(s)
- A Gänsslen
- Klinik für Unfallchirurgie, Orthopädie und Handchirurgie, Klinikum der Stadt Wolfsburg, Germany
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Bakhtiar H, Heidari N, Mehrvarzfar P, Ghazvini K, Habibi M, Jafarzadeh H, Dastmalchi N. In vitro comparative study of the microbial leakage of one-step, thermafil and lateral condensation techniques. J Contemp Dent Pract 2012; 13:27-30. [PMID: 22430690 DOI: 10.5005/jp-journals-10024-1091] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
AIM To compare the apical seal of lateral condensation technique, thermafil and one-step by using this model. MATERIALS AND METHODS A two-chamber bacterial microleakage model using E. faecalis as microbial marker was used for evaluation of the leakage. Bacterial penetration was monitored over a 60-day period. Leakage was recorded when turbidity was observed in the lower chamber. RESULTS After comparing the bacterial penetration values, total penetration was observed 45% in lateral condensation technique, 80% in thermafil and 75% in one-step. There was no significant difference between groups after 60 days; however, the microleakage in lateral condensation group was seen later than one-step and thermafil. CONCLUSION Thermafil and one-step obturator can be advocated as effective obturation techniques for achieving predictable success in endodontic therapy. CLINICAL SIGNIFICANCE Thermafil and one-step obturator are suitable devices for obturation.
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Affiliation(s)
- Hengameh Bakhtiar
- Department of Endodontics, Azad University of Medical Sciences, Tehran, Iran
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Rafiee H, Heidari N. Calculation of the Viscosity and Diffusion Coefficients for Some Binary Gaseous Mixtures Using the Semi-empirical Inversion Method. Journal of the Korean Chemical Society 2011. [DOI: 10.5012/jkcs.2011.55.4.581] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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Rafiee HR, Rastgar M, Heidari N. Calculation of Viscosity and Diffusion Coefficients for Two Binary Gaseous Mixtures Using the Semi-empirical Inversion Method. CHINESE J CHEM PHYS 2011. [DOI: 10.1088/1674-0068/24/04/412-418] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Zarrindast M, Nasehi M, Heidari N, Torkaman Boutorabi A. Effects of cholinergic system of dorsal hippocampus of rats in the MK801-induced anxiolytic-like behavior. Eur Psychiatry 2011. [DOI: 10.1016/s0924-9338(11)72143-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/18/2022] Open
Abstract
IntroductionSome investigations showed that the glutamate receptors have critical role for cognition such as learning and anxiety in the brain.ObjectivesThe possible involvement of cholinergic system of dorsal hippocampus in the anxiolytic-like response induced by NMDA receptor antagonist, MK801 has been investigated in the present study.MethodsThe male wistar rats were used and the elevated plus maze apparatus has been used to test parameters (%OAT, %OAE, locomotor activity, grooming, rereading and defection) of anxiety-like behaviors.ResultsThe data indicated that intra-CA1 administration of MK801 (2 μg/rat) increased %OAT and %OAE but did not other exploratory behaviors, indicating an anxiolytic-like response. Moreover, intra-hippocampal injection of cholinergic receptor antagonists, mecamylamine (2 μg/rat) and scopolamine (4 μg/rat) by itselves, 5 min before testing increased %OAT and %OAE, but did not alter locomotor activity and other exploratory behaviors, suggesting anxiolytic-like behavior. On the other hand, intra-CA1 co-administration of ineffective doses of scopolamine (3 μg/rat), but not mecamylamine (1 μg/rat) with ineffective dose of MK801 (1 μg/rat) increased %OAT and %OAE.ConclusionThe data may indicate that the possible involvement of cholinergic system of CA1 on anxiolytic-like response induced by MK801.
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Abstract
Intra-articular punctures and injections are performed routinely on patients with injuries to and chronic diseases of joints, to release an effusion or haemarthrosis, or to inject drugs. The purpose of this study was to investigate the accuracy of placement of the needle during this procedure. A total of 76 cadaver acromioclavicular joints were injected with a solution containing methyl blue and subsequently dissected to distinguish intra- from peri-articular injection. In order to assess the importance of experience in achieving accurate placement, half of the injections were performed by an inexperienced resident and half by a skilled specialist. The specialist injected a further 20 cadaver acromioclavicular joints with the aid of an image intensifier. The overall frequency of peri-articular injection was much higher than expected at 43% (33 of 76) overall, with 42% (16 of 38) by the specialist and 45% (17 of 38) by the resident. The specialist entered the joint in all 20 cases when using the image intensifier. Correct positioning of the needle in the joint should be facilitated by fluoroscopy, thereby guaranteeing an intra-articular injection.
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Affiliation(s)
- W Pichler
- Department of Traumatology, Medical University of Graz, Graz, Austria
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Heidari N, Pichler W, Grechenig S, Grechenig W, Weinberg AM. Does the anteromedial or anterolateral approach alter the rate of joint puncture in injection of the ankle? ACTA ACUST UNITED AC 2010; 92:176-8. [DOI: 10.1302/0301-620x.92b1.22355] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Injection or aspiration of the ankle may be performed through either an anteromedial or an anterolateral approach for diagnostic or therapeutic reasons. We evaluated the success of an intra-articular puncture in relation to its site in 76 ankles from 38 cadavers. Two orthopaedic surgical trainees each injected methylene blue dye into 18 of 38 ankles through an anterolateral approach and into 20 of 38 through an anteromedial. An arthrotomy was then performed to confirm the placement of the dye within the joint. Of the anteromedial injections 31 of 40 (77.5%, 95% confidence interval (CI) 64.6 to 90.4) were successful as were 31 of 36 (86.1%, 95% CI 74.8 to 97.4) anterolateral injections. In total 62 of 76 (81.6%, 95% CI 72.9 to 90.3) of the injections were intra-articular with a trend towards greater accuracy with the anterolateral approach, but this difference was not statistically significant (p = 0.25). In the case of trainee A, 16 of 20 anteromedial injections and 14 of 18 anterolateral punctures were intra-articular. Trainee B made successful intra-articular punctures in 15 of 20 anteromedial and 17 of 18 anterolateral approaches. There was no significant difference between them (p = 0.5 and p = 0.16 for the anteromedial and anterolateral approaches, respectively). These results were similar to those of other reported studies. Unintended peri-articular injection can cause complications and an unsuccessful aspiration can delay diagnosis. Placement of the needle may be aided by the use of ultrasonographic scanning or fluoroscopy which may be required in certain instances.
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Affiliation(s)
- N. Heidari
- Royal London Hospital, Whitechapel Road, Whitechapel, London E1 1BR, UK
| | | | | | | | - A. M. Weinberg
- Department of Paediatric Surgery, Medical University of Graz, Auenbruggerplatz 7a, 8036 Graz, Austria
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Weinberg AM, Pichler W, Grechenig S, Tesch NP, Heidari N, Grechenig W. Frequency of successful intra-articular puncture of the sternoclavicular joint: a cadaver study. Scand J Rheumatol 2009; 38:396-8. [DOI: 10.1080/03009740902953856] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Pichler W, Grechenig W, Tesch NP, Weinberg AM, Heidari N, Clement H. The risk of iatrogenic injury to the deep peroneal nerve in minimally invasive osteosynthesis of the tibia with the less invasive stabilisation system. ACTA ACUST UNITED AC 2009; 91:385-7. [DOI: 10.1302/0301-620x.91b3.21673] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Percutaneous stabilisation of tibial fractures by locking plates has become an accepted form of osteosynthesis. A potential disadvantage of this technique is the risk of damage to the neurovascular bundles in the anterior and peroneal compartments. Our aim in this anatomical study was to examine the relationship of the deep peroneal nerve to a percutaneously-inserted Less Invasive Stabilisation System tibial plate in the lower limbs of 18 cadavers. Screws were inserted through stab incisions. The neurovascular bundle was dissected to reveal its relationship to the plate and screws. In all cases, the deep peroneal nerve was in direct contact with the plate between the 11th and the 13th holes. In ten specimens the nerve crossed superficial to the plate, in six it was interposed between the plate and the bone and in the remaining two specimens it coursed at the edge of the plate. Percutaneous insertion of plates with more than ten holes is not recommended because of the risk of injury to the neurovascular structures. When longer plates are required we suggest distal exposure so that the neurovascular bundle may be displayed and protected.
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Affiliation(s)
- W. Pichler
- Department of Paediatric Surgery Medical University of Graz, Auenbruggerplatz 7a, A-8036 Graz, Austria
| | - W. Grechenig
- Department of Paediatric Surgery Medical University of Graz, Auenbruggerplatz 7a, A-8036 Graz, Austria
| | - N. P. Tesch
- Anatomic Institute Medical University of Graz, Harrachgasse 21, 8010 Graz, Austria
| | - A. M. Weinberg
- Department of Paediatric Surgery Medical University of Graz, Auenbruggerplatz 7a, A-8036 Graz, Austria
| | - N. Heidari
- Royal London Rotation, Colchester General Hospital, Turner Road, Colchester, Essex CO4 5JL, UK
| | - H. Clement
- Department of Paediatric Surgery Medical University of Graz, Auenbruggerplatz 7a, A-8036 Graz, Austria
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Vakifahmetoglu H, Olsson M, Tamm C, Heidari N, Orrenius S, Zhivotovsky B. DNA damage induces two distinct modes of cell death in ovarian carcinomas. Cell Death Differ 2007; 15:555-66. [PMID: 18064041 DOI: 10.1038/sj.cdd.4402286] [Citation(s) in RCA: 112] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022] Open
Abstract
Activation of p53 by cellular stress may lead to either cell cycle arrest or apoptotic cell death. Restrictions in a cell's ability to halt the cell cycle might, in turn, cause mitotic catastrophe, a delayed type of cell death with distinct morphological features. Here, we have investigated the contribution of p53 and caspase-2 to apoptotic cell death and mitotic catastrophe in cisplatin-treated ovarian carcinoma cell lines. We report that both functional p53 and caspase-2 were required for the apoptotic response, which was preceded by translocation of nuclear caspase-2 to the cytoplasm. In the absence of functional p53, cisplatin treatment resulted in caspase-2-independent mitotic catastrophe followed by necrosis. In these cells, apoptotic functions could be restored by transient expression of wt p53. Hence, p53 appeared to act as a switch between apoptosis and mitotic catastrophe followed by necrosis-like lysis in this experimental model. Further, we show that inhibition of Chk2, and/or 14-3-3sigma deficiency, sensitized cells to undergo mitotic catastrophe upon treatment with DNA-damaging agents. However, apoptotic cell death seemed to be the final outcome of this process. Thus, we hypothesize that the final mode of cell death triggered by DNA damage in ovarian carcinoma cells is determined by the profile of proteins involved in the regulation of the cell cycle, such as p53- and Chk2-related proteins.
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Affiliation(s)
- H Vakifahmetoglu
- Division of Toxicology, Institute of Environmental Medicine, Karolinska Institutet, Stockholm, Sweden
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Thaler A, Heidari N, Cox B, Schneider H. Stability constants of copper(I) and silver(I) complexes with open-chain, macrocyclic and -bicyclic aza-ligands in acetonitrile and comparison with results in dimethylsulfoxide. Inorganica Chim Acta 1999. [DOI: 10.1016/s0020-1693(98)00396-x] [Citation(s) in RCA: 20] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Heidari N, Thaler A, Schneider H, Cox B. Stability constants of copper(I) and silver(I) complexes with aza-crown ethers and cryptands in dimethylsulfoxide. Inorganica Chim Acta 1998. [DOI: 10.1016/s0020-1693(98)00121-2] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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