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Yousefi S, Borhani-Haghighi A, Safari A, Shapiro L. Neurological Involvement in Malignant Atrophic Papulosis: A Comprehensive Review of Literature. Neurol India 2022; 70:5-10. [PMID: 35263846 DOI: 10.4103/0028-3886.338719] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Malignant atrophic papulosis (MAP), or systemic Degos disease, is an obliterative vasculopathy of unknown origin, characterized by erythematous papules found on the skin, central nervous system (Neuro-MAP) and gastrointestinal tract. Neurological involvement occurs in approximately 20% of systemic cases, is progressive and largely fatal. It can be described in two forms: 1) the parenchymal presenting with meningoencephalitis and meningomyelitis and 2) the neurovascular presenting with large cerebral infarcts, intracranial and subarachnoid hemorrhage, subdural hematoma and venous sinus thrombosis. Predilection to subdural hematoma or hygroma is characteristic for neurological involvement in MAP in comparison to other vasculpathies and vasculitides. Peripheral nervous system manifestations are less common and include polyradiculopathy, neuropathy, and myopathy. CSF analysis usually shows mild to moderate pleocytosis, increased protein content, and normal glucose. Brain MRI may reveal cortical, subcortical and deep white matter ischemic lesions with possible nodular, leptomeningeal, dural, or ependymal enhancement. Spinal cord MRI may reveal patchy lesions from the periphery to the center or cord atrophy in progressive course. Neurological involvement in MAP has a grave prognosis. The interval from onset of papulosis to death averages two years in patients with neurological involvement. There is no confirmed treatment for MAP but there are promising reports with eculizumab and treprostinil.
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Affiliation(s)
- Samaneh Yousefi
- Student Research Committee, Fasa University of Medical Sciences, Fasa, Iran
| | - Afshin Borhani-Haghighi
- Clinical Neurology Research Center; Deparment of Neurology, Shiraz University of Medical Sciences, Shiraz, Iran
| | - Anahid Safari
- Stem Cells Technology Reseach Center, Shiraz University of Medical Sciences, Shiraz, Iran
| | - Lee Shapiro
- Albany Medical College, Albany, New York, USA
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Bart Y, Mohr-Sasson A, Yousefi S, Goldenberg M, Meyer R, Toussia-Cohen S, Eyal Y, Mazaki-Tovi S, Mashiach R. Adnexal torsion recurrence-is the adnexal twist degree a risk factor? A retrospective cohort study. BJOG 2021; 128:1511-1516. [PMID: 33978295 DOI: 10.1111/1471-0528.16738] [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] [Accepted: 04/16/2021] [Indexed: 11/29/2022]
Abstract
OBJECTIVE To evaluate whether the adnexal twist degree is related to torsion recurrence and whether there is a dose-dependent correlation. DESIGN A retrospective cohort study. SETTING Single tertiary medical centre. POPULATION The study includes non-pregnant patients operated, for the first time, for adnexal torsion, between 2011 and 2018. METHODS Information regarding the degree of adnexal twist was collected from surgical reports. Recurrence was identified using a computerised database and ascertained via telephone with a response rate of 87.2% (253/290). MAIN OUTCOME MEASURES Adnexal torsion recurrence rate. RESULTS A total of 182 women who had undergone laparoscopic detorsion met the inclusion criteria. Twenty-two had torsion recurrence (12.1%). Adnexal twist degree in the primary event was associated with a higher recurrence risk: 4.3% of women with twist degree ≤360 (n = 3/70), 14.5% of women with twist degree of 361-720 (n = 9/62) and 20% of women with twist degree >720 (n = 10/50) (P = 0.03). The median twist degree was 540 (interquartile range [IQR] 360-855) and 720 (IQR 675-1080) degrees in the control and study groups, respectively (P = 0.005). Additional possibly associated factors for recurrence were evaluated. Age emerged as a possible risk factor, with a median age of 19 years in the recurrence group (IQR 14-27 years) versus 28.5 (IQR 19-36 years) in the non-recurrence group (P < 0.01). Logistic regression analysis revealed that together with age, adnexal twist degree remained significantly associated with torsion recurrence (odds ratio [OR] 1.98, 95% CI 1.09-3.61; P = 0.02). CONCLUSION Adnexal twist degree was found to be positively associated with the risk of torsion recurrence. TWEETABLE ABSTRACT Adnexal twist degree was found to be positively associated with the risk of torsion recurrence.
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Affiliation(s)
- Y Bart
- Department of Obstetrics and Gynecology, Sheba Medical Center, Tel-Hashomer, Israel.,Sackler School of Medicine, Tel Aviv University, Tel Aviv, Israel
| | - A Mohr-Sasson
- Department of Obstetrics and Gynecology, Sheba Medical Center, Tel-Hashomer, Israel.,Sackler School of Medicine, Tel Aviv University, Tel Aviv, Israel
| | - S Yousefi
- Department of Obstetrics and Gynecology, Sheba Medical Center, Tel-Hashomer, Israel
| | - M Goldenberg
- Department of Obstetrics and Gynecology, Sheba Medical Center, Tel-Hashomer, Israel
| | - R Meyer
- Department of Obstetrics and Gynecology, Sheba Medical Center, Tel-Hashomer, Israel.,Sackler School of Medicine, Tel Aviv University, Tel Aviv, Israel
| | - S Toussia-Cohen
- Department of Obstetrics and Gynecology, Sheba Medical Center, Tel-Hashomer, Israel.,Sackler School of Medicine, Tel Aviv University, Tel Aviv, Israel
| | - Y Eyal
- Kaplan Medical Center, Rehovot, Israel
| | - S Mazaki-Tovi
- Department of Obstetrics and Gynecology, Sheba Medical Center, Tel-Hashomer, Israel.,Sackler School of Medicine, Tel Aviv University, Tel Aviv, Israel
| | - R Mashiach
- Department of Obstetrics and Gynecology, Sheba Medical Center, Tel-Hashomer, Israel.,Sackler School of Medicine, Tel Aviv University, Tel Aviv, Israel
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Tehranian N, Hosseini M, Ramezani-Tehrani F, Yousefi S. Association of serum ghrelin with weight gain during pregnancy in overweight and normal women. J Endocrinol Invest 2019; 42:809-813. [PMID: 30465249 DOI: 10.1007/s40618-018-0986-x] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/18/2018] [Accepted: 11/15/2018] [Indexed: 11/25/2022]
Abstract
PURPOSE Despite the fact that the ghrelin hormone plays pivotal role in the process of weight gain, its correlation with weighing during pregnancy has not been elucidated. Hence, the present study was conducted to evaluate the correlation between plasma ghrelin levels and gestational weight gain in overweight and normal women. METHODS This prospective cohort study was conducted in 27 overweight and 18 normal body mass index (BMI) pregnant women referring to Tehran health care centers. Weight gain during all trimesters of pregnancy was measured and the blood samples were collected at 8-12 (first trimester) and 16-20 weeks (second trimester) of pregnancy. The plasma total ghrelin concentration was measured by ELISA method. RESULTS The overweight pregnant women exhibited significantly lower weight gain at the second (p = 0.002), third trimesters (p = 0.005) as well as total weighing during pregnancy (p = 0.001) compared to the normal BMI pregnant women. There was no significant difference in plasma ghrelin levels between the groups from the first to the second trimesters of pregnancy (p > 0.05). Moreover, no correlation was found between ghrelin levels and gestational weight gain in the overweight and normal groups. CONCLUSIONS Our results indicate that the increased level of serum ghrelin could not be considered as a key mediator for weight gain difference during pregnancy of overweight women.
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Affiliation(s)
- N Tehranian
- Department of Midwifery and Reproductive Health, Faculty of Medical Sciences, Tarbiat Modares University, Tehran, Iran
| | - M Hosseini
- Cellular and Molecular Research Center,Department of Anatomy, Birjand University of Medical Sciences, Birjand, Iran
| | - F Ramezani-Tehrani
- Reproductive Endocrinology Research Center, Research Institute for Endocrine Sciences, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - S Yousefi
- Department of Midwifery and Reproductive Health, Faculty of Nursing and Midwifery, Birjand University of Medical Sciences, Birjand, 9717853577, Iran.
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Akbari R, Sekhavati MH, Bahrami A, Majidzadeh Heravi R, Yousefi S. Production of Brucella lumazine Synthase Recombinant Protein to Design a Subunit Vaccine against Undulant Fever. Arch Razi Inst 2019; 74:1-6. [PMID: 31013002 DOI: 10.22092/ari.2019.117997] [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] [Subscribe] [Scholar Register] [Received: 02/05/2017] [Accepted: 01/13/2018] [Indexed: 09/30/2022]
Abstract
Brucella bacterium causes Brucellosis, an infectious disease spreading from animals to human. Brucella lumazine synthase (BLS) is a highly immunogenic protein with adjuvant properties, which has been introduced as an effective protein carrier for vaccine development. This protein also plays a significant role in inducing immune system. This study aimed to clone, express, and purify the BLS gene from Brucella melitensis Rev1. The BLS gene was amplified by particular primers with the restriction enzyme sites as a linker and it was inserted into pTZ57R/T vector. Subsequently, it was ligated into pET32(a)+ expression vector. Recombinant expression vector containing coding sequence of BLS was transformed into E. coli BL21 (DE3) host gene expression and stimulated by 0.1mM IPTG. The results of sequencing showed that there were not any mutations in BLS encoding sequence. The expression results were set by sequencing and endorsed using sodium dodecyl sulfate-polyacrylamide gel electrophoresis (SDS-PAGE) analyses and western blotting that showed 35 kDa protein band appropriately.
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Affiliation(s)
- R Akbari
- Department of Animal Science, Faculty of Agriculture, Ferdowsi University of Mashhad, Mashhad, Iran
| | - M H Sekhavati
- Department of Animal Science, Faculty of Agriculture, Ferdowsi University of Mashhad, Mashhad, Iran.,Department of Animal Science, Faculty of Agriculture, Ferdowsi University of Mashhad, Mashhad, Iran
| | - A Bahrami
- Immunology Research Center, School of Medicine, Mashhad University of Medical Sciences, Mashhad, Iran
| | | | - S Yousefi
- Department of Animal Science, Faculty of Agriculture, Ferdowsi University of Mashhad, Mashhad, Iran
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de Graauw E, Sitaru C, Horn MP, Borradori L, Yousefi S, Simon D, Simon HU. Monocytes enhance neutrophil-induced blister formation in an ex vivo model of bullous pemphigoid. Allergy 2018; 73:1119-1130. [PMID: 29222810 DOI: 10.1111/all.13376] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 12/02/2017] [Indexed: 12/14/2022]
Abstract
BACKGROUND Lesions of bullous pemphigoid (BP), an autoimmune subepidermal blistering disease characterized by the presence of tissue-bound and circulating autoantibodies to hemidesmosomal antigens, harbor a mixed inflammatory cellular infiltrate. In various models, neutrophils, eosinophils, mast cells, monocytes as well as B and T cells have been shown to be involved in the pathogenesis of BP. However, their interactions with and effective role in blister formation remain uncertain. This study was aimed at investigating the effect of monocyte/neutrophil interaction on blister formation in an ex vivo BP model. METHODS Skin cryosections were incubated with purified human neutrophils and monocytes, in the presence or absence of BP autoantibodies. Production of reactive oxygen species (ROS), degranulation, mediator release (neutrophil elastase [NE], myeloperoxidase [MPO], matrix metalloproteinase-9 [MMP-9]), binding of Fcγ receptor (CD16, CD32, CD64), and cell adhesion (CD18, ICAM-1) was investigated using appropriate inhibitors. Dermal-epidermal separation (DES) was assessed by light microscopy and quantified by Fiji software. RESULTS Monocytes and neutrophils synergistically interact resulting in a significantly higher DES compared to either monocytes or neutrophils separately (P < .0001). Monocyte/neutrophil-induced DES was associated with increased ROS production and was dependent on adhesion and FcγRIII binding. Upon stimulation by the granule-poor fraction of monocyte supernatants, neutrophils increased their release of MMP-9, thereby also DES at the dermal-epidermal junction of skin cryosections. CONCLUSION Our observations suggest that the interaction of cells, as shown here for monocytes and neutrophils, enhances mediator release resulting in an increased subepidermal blister formation. Thus, blocking intercellular cross talk promises a new therapeutic approach for blocking tissue damage in BP.
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Affiliation(s)
- E. de Graauw
- Institute of Pharmacology; University of Bern; Bern Switzerland
| | - C. Sitaru
- Department of Dermatology; University Medical Center Freiburg; Freiburg Germany
- BIOSS Centre for Biological Signalling Studies; Albert Ludwig University of Freiburg; Freiburg Germany
| | - M. P. Horn
- University Institute of Clinical Chemistry and Centre of Laboratory Medicine; Inselspital; Bern University Hospital; University of Bern; Bern Switzerland
| | - L. Borradori
- Department of Dermatology, Inselspital; Bern University Hospital; University of Bern; Bern Switzerland
| | - S. Yousefi
- Institute of Pharmacology; University of Bern; Bern Switzerland
| | - D. Simon
- Department of Dermatology, Inselspital; Bern University Hospital; University of Bern; Bern Switzerland
| | - H.-U. Simon
- Institute of Pharmacology; University of Bern; Bern Switzerland
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Yousefi S, Ahmadi-hamedani M, Narenji Sani R, Moslemi HR, Ghafari Khaligh S, Darvishi MM. Pentoxifylline mitigates detrimental impact of chronic nonbacterial prostatitis on sperm characteristics, reproductive hormones and histopathology in rats. Andrologia 2017; 50. [DOI: 10.1111/and.12932] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 10/03/2017] [Indexed: 01/25/2023] Open
Affiliation(s)
- S. Yousefi
- Semnan University of Veterinary Medicine; Semnan Iran
| | - M. Ahmadi-hamedani
- Department of Clinical Sciences; Faculty of Veterinary Medicine; Semnan University; Semnan Iran
| | - R. Narenji Sani
- Department of Clinical Sciences; Faculty of Veterinary Medicine; Semnan University; Semnan Iran
| | - H. R. Moslemi
- Department of Clinical Sciences; Faculty of Veterinary Medicine; Semnan University; Semnan Iran
| | - S. Ghafari Khaligh
- Department of Pathobiology; Faculty of Veterinary Medicine; Semnan University; Semnan Iran
| | - M. M. Darvishi
- Department of Pathobiology; Faculty of Veterinary Medicine; Semnan University; Semnan Iran
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de Graauw E, Sitaru C, Horn M, Borradori L, Yousefi S, Simon HU, Simon D. Evidence for a role of eosinophils in blister formation in bullous pemphigoid. Allergy 2017; 72:1105-1113. [PMID: 28135772 DOI: 10.1111/all.13131] [Citation(s) in RCA: 76] [Impact Index Per Article: 10.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 01/22/2017] [Indexed: 01/21/2023]
Abstract
BACKGROUND Bullous pemphigoid (BP) is an autoimmune bullous disease of the skin characterized by subepidermal blister formation due to tissue-bound and circulating autoantibodies to the hemidesmosomal antigens BP180 and BP230. Although eosinophils and their toxic mediators are found abundantly in BP lesions, their role in blister formation has remained unclear. OBJECTIVE To investigate the role of eosinophils in the pathogenesis of BP with a specific focus on blister formation and to define conditions inducing dermal-epidermal separation (DES). METHODS In an ex vivo human model of BP, normal human skin cryosections were incubated with purified human peripheral blood eosinophils with or without activation in the presence or absence of BP autoantibodies, brefeldin A, diphenyleneiodonium, DNase or blocking F(ab')2 fragments to CD16, CD18, CD32 and CD64. Dermal-epidermal separation was assessed by light microscopy studies and quantified using Fiji software. RESULTS Following activation with IL-5 and in the presence of BP autoantibodies, eosinophils induced separation along the dermal-epidermal junction of ex vivo skin. Dermal-epidermal separation was significantly reduced by blocking any of the following: Fcγ receptor binding (P = 0.048), eosinophil adhesion (P = 0.046), reactive oxygen species (ROS) production (P = 0.002), degranulation (P < 0.0001) or eosinophil extracellular trap (EET) formation (P = 0.048). CONCLUSIONS Our results provide evidence that IL-5-activated eosinophils directly contribute to BP blister formation in the presence of BP autoantibodies. Dermal-epidermal separation by IL-5-activated eosinophils depends on adhesion and Fcγ receptor activation, requires elevated ROS production and degranulation and involves EET formation. Thus, targeting eosinophils may be a promising therapeutic approach for BP.
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Affiliation(s)
- E. de Graauw
- Institute of Pharmacology; University of Bern; Bern Switzerland
| | - C. Sitaru
- Department of Dermatology and Centre for Biological Signaling Studies (BIOSS); University Medical Center Freiburg; Freiburg Germany
| | - M. Horn
- Centre of Laboratory Medicine; Inselspital; Bern University Hospital; Bern Switzerland
| | - L. Borradori
- Department of Dermatology; Inselspital; Bern University Hospital; University of Bern; Bern Switzerland
| | - S. Yousefi
- Institute of Pharmacology; University of Bern; Bern Switzerland
| | - H.-U. Simon
- Institute of Pharmacology; University of Bern; Bern Switzerland
| | - D. Simon
- Department of Dermatology; Inselspital; Bern University Hospital; University of Bern; Bern Switzerland
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Yousefi S, Ahmad M, Xiang L, Tang S, Chen Y, Zhang M, Zou J, Umegaki K, Shirato H, Xing L. TU-FG-BRB-08: Challenges, Limitations and Future Outlook Towards Clinical Translation of Proton Acoustic Range Verification. Med Phys 2016. [DOI: 10.1118/1.4957548] [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: 11/07/2022] Open
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Sano M, Yousefi S, Xing L. Catheter Based Structural and Molecular Imaging of Prostate Cancer Using an Ultrasound/Photoacoustic Probe. Int J Radiat Oncol Biol Phys 2015. [DOI: 10.1016/j.ijrobp.2015.07.1913] [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: 10/22/2022]
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Haghighi AB, Kokabi S, Yousefi S, Emami M, Shariat A, Nikseresht A, Ashjazadeh N, Izadi S, Petramfar P, Poursadegh M, Jaberi AR, Emami S, Agheli H, Nemati R, Yaghoubi E, Kashani K, Panahandeh M, Heidari-Khormizi SM, Cruz-Flores S, Edgell R. The Prevalence and Factors Contributing to Hemodynamic Depression in Patients Undergoing Carotid Angioplasty and Stenting. J Vasc Interv Neurol 2015; 8:5-10. [PMID: 26600923 PMCID: PMC4634774] [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] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
BACKGROUND Hemodynamic depression, including bradycardia and hypotension, is among the most common complications of carotid angioplasty and stenting. METHODS AND MATERIAL A prospective, cross-sectional study was conducted at Shiraz University of Medical Sciences in southern Iran from 2011 to 2013. Consecutive patients undergoing carotid angioplasty and stenting were included. Demographic data, atherosclerotic risk factors, preprocedural blood pressure, the site of stenosis, the degree of stenosis, and data regarding technical factors were recorded. Hemodynamic depression was defined as a systolic blood pressure less than 90 mmHg and/or heart rate less than 50 beat/min. RESULTS About 170 patients (67% male, mean age: 71+9.8, 55.9% right side, 82.9% symptomatic) were recruited. Mean degree of stenosis was 79.4% in operated side and 40.7% in nonoperated side. Predilation, postdilation, or both were conducted in 18(10.5%), 141(83%), 11(6.5%) patients respectively. Thirteen (7.6%), 41(24%), and 12(7%) of patients developed postprocedural bradycardia, hypotension or both, respectively. Two patients had a stroke after CAS and periprocedural mortality was 0%. Hemodynamic depression after CAS had a significant association with preprocedure blood pressure and the use of an open cell stent design, but not with atherosclerotic risk factors, site and/or degree of stenosis, predilation, or postdilation. Hemodynamic depression significantly increased hospital stay too. CONCLUSION Preprocedural hydration and close-cell stents may decrease the risk of poststenting hemodynamic depression.
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Affiliation(s)
- Afshin Borhani Haghighi
- Clinical Neurology Research Center, Shiraz University of Medical Sciences, Shiraz, Iran
- Departments of Neurolog,y, Shiraz University of Medical Sciences, Shiraz, Iran
| | - Safoora Kokabi
- Departments of Neurolog,y, Shiraz University of Medical Sciences, Shiraz, Iran
| | - Samaneh Yousefi
- Non communicable diseases research center, Fasa University of Medical Sciences, Fasa, Iran
| | - Mehrdad Emami
- Transgenic Technology Research Center, Shiraz University of Medical Sciences, Shiraz, Iran
| | - Abdolhamid Shariat
- Clinical Neurology Research Center, Shiraz University of Medical Sciences, Shiraz, Iran
- Departments of Neurolog,y, Shiraz University of Medical Sciences, Shiraz, Iran
| | - Alireza Nikseresht
- Clinical Neurology Research Center, Shiraz University of Medical Sciences, Shiraz, Iran
- Departments of Neurolog,y, Shiraz University of Medical Sciences, Shiraz, Iran
| | - Nahid Ashjazadeh
- Clinical Neurology Research Center, Shiraz University of Medical Sciences, Shiraz, Iran
- Departments of Neurolog,y, Shiraz University of Medical Sciences, Shiraz, Iran
| | - Sadegh Izadi
- Clinical Neurology Research Center, Shiraz University of Medical Sciences, Shiraz, Iran
- Departments of Neurolog,y, Shiraz University of Medical Sciences, Shiraz, Iran
| | - Peyman Petramfar
- Clinical Neurology Research Center, Shiraz University of Medical Sciences, Shiraz, Iran
- Departments of Neurolog,y, Shiraz University of Medical Sciences, Shiraz, Iran
| | - Maryam Poursadegh
- Clinical Neurology Research Center, Shiraz University of Medical Sciences, Shiraz, Iran
- Departments of Neurolog,y, Shiraz University of Medical Sciences, Shiraz, Iran
| | - Abbas Rahimi Jaberi
- Clinical Neurology Research Center, Shiraz University of Medical Sciences, Shiraz, Iran
- Departments of Neurolog,y, Shiraz University of Medical Sciences, Shiraz, Iran
| | - Sajjad Emami
- Department of Neurology, Faculty of Medicine, Jahrom University of Medical Sciences, Jahrom, Iran
| | - Hamid Agheli
- Neurologist, Shahidzadeh Hospital, Behbahan, Iran
| | - Reza Nemati
- Department of Neurology, Faculty of Medicine, Bushehr University of Medical Sciences, Bushehr, Iran
| | - Ehsan Yaghoubi
- Department of Neurology, Faculty of Medicine, Yasuj University of Medical Sciences, Yasuj, Iran
| | - Kaveh Kashani
- Department of Neurology, Faculty of Medicine, Fasa University of Medical Sciences, Fasa, Iran
| | | | | | | | - Randal Edgell
- Departments of Neurology and Psychiatry, Saint Louis University, Saint Louis, MO, USA
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Yousefi S, Morshed M, Amini P, Stojkov D, Simon D, von Gunten S, Kaufmann T, Simon HU. Basophils exhibit antibacterial activity through extracellular trap formation. Allergy 2015; 70:1184-8. [PMID: 26043360 DOI: 10.1111/all.12662] [Citation(s) in RCA: 58] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 05/29/2015] [Indexed: 01/21/2023]
Abstract
Basophils are primarily associated with immunomodulatory functions in allergic diseases and parasitic infections. Recently, it has been demonstrated that both activated human and mouse basophils can form extracellular DNA traps (BETs) containing mitochondrial DNA and granule proteins. In this report, we provide evidence that, in spite of an apparent lack of phagocytic activity, basophils can kill bacteria through BET formation.
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Affiliation(s)
- S. Yousefi
- Institute of Pharmacology; University of Bern; Bern Switzerland
| | - M. Morshed
- Institute of Pharmacology; University of Bern; Bern Switzerland
| | - P. Amini
- Institute of Pharmacology; University of Bern; Bern Switzerland
| | - D. Stojkov
- Institute of Pharmacology; University of Bern; Bern Switzerland
| | - D. Simon
- Department of Dermatology; Inselspital, Bern University Hospital; Bern Switzerland
| | - S. von Gunten
- Institute of Pharmacology; University of Bern; Bern Switzerland
| | - T. Kaufmann
- Institute of Pharmacology; University of Bern; Bern Switzerland
| | - H.-U. Simon
- Institute of Pharmacology; University of Bern; Bern Switzerland
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Borhani Haghighi A, Yousefi S, Bahramali E, Kokabi S, Heydari ST, Shariat A, Nikseresht A, Ashjazadeh N, Izadi S, Petramfar P, Poursadegh M, Rahimi Jaberi A, Emami S, Agheli H, Nemati R, Yaghoubi E, Abdi MH, Panahandeh M, Heydari M, Safari A, Basir M, Cruz-Flores S, Edgell R. Demographic and Technical Risk Factors of 30-Day Stroke, Myocardial Infarction, and/or Death in Standard- and High-Risk Patients Who Underwent Carotid Angioplasty and Stenting. Interv Neurol 2015; 3:165-73. [PMID: 26279663 DOI: 10.1159/000430923] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
BACKGROUND Carotid angioplasty and stenting (CAS) is an accepted treatment to prevent stroke in patients with carotid artery stenosis. The purpose of this study is to identify risk factors for major complications after CAS. MATERIALS AND METHODS This is a prospective study that was conducted at Shiraz University of Medical Sciences in southern Iran from March 2011 to June 2014. Consecutive patients undergoing CAS were enrolled. Both standard- and high-risk patients for endarterectomy were enrolled. Demographic data, atherosclerotic risk factors, site of stenosis, degree of stenosis, and data regarding technical factors were recorded. Thirty-day stroke, myocardial infarction, and/or death were considered as the composite primary outcomes of the study. RESULTS A total of 251 patients were recruited (mean age: 71.1 ± 9.6 years; male: 65.3%). Of these, 178 (70.9%) were symptomatic, 73 (29.1%) were diabetic, 129 (51.4%) were hyperlipidemic, 165 (65.7%) were hypertensive, and 62 (24.7%) patients were smokers. CAS was performed for left internal carotid artery (ICA) in 113 (45.4%) patients. Fourteen (5.6%) patients had sequential bilateral stenting. Mean stenosis of operated ICA was 80.2 ± 13.8%. An embolic protection device was used in 203 (96.2%) patients. Pre- and postdilation were performed in 39 (18.5%) and 182 (86.3%) patients, respectively. Composite outcomes were observed in 3.6% of patients (3.2% stroke, 0% myocardial infarction, and 1.2% death). Left-sided lesions and the presence of diabetes mellitus were significantly associated with poor short-term outcome (p = 0.025 and p = 0.020, respectively). CONCLUSION There was a higher risk of short-term major complications in diabetic patients and for left carotid artery intervention.
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Affiliation(s)
- Afshin Borhani Haghighi
- Clinical Neurology Research Center, Shiraz University of Medical Sciences, Fasa, Iran ; Department of Neurology, Shiraz University of Medical Sciences, Fasa, Iran
| | - Samaneh Yousefi
- Noncommunicable Diseases Research Center, Fasa University of Medical Sciences, Fasa, Iran
| | - Ehsan Bahramali
- Cardiology Department, Faculty of Medicine, Fasa University of Medical Sciences, Fasa, Iran
| | - Safoora Kokabi
- Transgenic Technology Research Center, Shiraz University of Medical Sciences, Fasa, Iran
| | - Seyed Taghi Heydari
- Health Policy Research Center, Shiraz University of Medical Sciences, Fasa, Iran
| | - Abdolhamid Shariat
- Clinical Neurology Research Center, Shiraz University of Medical Sciences, Fasa, Iran ; Department of Neurology, Shiraz University of Medical Sciences, Fasa, Iran
| | - Alireza Nikseresht
- Clinical Neurology Research Center, Shiraz University of Medical Sciences, Fasa, Iran ; Department of Neurology, Shiraz University of Medical Sciences, Fasa, Iran
| | - Nahid Ashjazadeh
- Clinical Neurology Research Center, Shiraz University of Medical Sciences, Fasa, Iran ; Department of Neurology, Shiraz University of Medical Sciences, Fasa, Iran
| | - Sadegh Izadi
- Clinical Neurology Research Center, Shiraz University of Medical Sciences, Fasa, Iran ; Department of Neurology, Shiraz University of Medical Sciences, Fasa, Iran
| | - Peyman Petramfar
- Clinical Neurology Research Center, Shiraz University of Medical Sciences, Fasa, Iran ; Department of Neurology, Shiraz University of Medical Sciences, Fasa, Iran
| | - Maryam Poursadegh
- Clinical Neurology Research Center, Shiraz University of Medical Sciences, Fasa, Iran ; Department of Neurology, Shiraz University of Medical Sciences, Fasa, Iran
| | - Abbas Rahimi Jaberi
- Clinical Neurology Research Center, Shiraz University of Medical Sciences, Fasa, Iran ; Department of Neurology, Shiraz University of Medical Sciences, Fasa, Iran
| | - Sajjad Emami
- Department of Neurology, Faculty of Medicine, Jahrom University of Medical Sciences, Jahrom, Iran
| | - Hamid Agheli
- Shahidzadeh Hospital, Behbahan, Bushehr University of Medical Sciences, Bushehr, Iran
| | - Reza Nemati
- Department of Neurology, Faculty of Medicine, Bushehr University of Medical Sciences, Bushehr, Iran
| | - Ehsan Yaghoubi
- Department of Neurology, Faculty of Medicine, Yasuj University of Medical Sciences, Yasuj, Iran
| | - Mohammad Hosein Abdi
- Motaharri Hospital, Marvdasht, Rafsanjan University of Medical Sciences, Rafsanjan, Iran
| | - Majid Panahandeh
- Ordibehesht Hospital, Shiraz, Fasa University of Medical Sciences, Fasa, Iran
| | - Moslem Heydari
- Department of Neurology, Faculty of Medicine, Rafsanjan University of Medical Sciences, Rafsanjan, Iran
| | - Anahid Safari
- Department of Pharmacology, Kazeroon Azad University, Kazeroon, Iran
| | - Marziyeh Basir
- Student Research Committee, Fasa University of Medical Sciences, Fasa, Iran
| | | | - Randal Edgell
- Department of Neurology, Saint Louis University, Saint Louis, Mo., USA ; Department of Psychiatry, Saint Louis University, Saint Louis, Mo., USA
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Rückert RI, Hanack U, Aronés-Gomez S, Yousefi S, Brechtel K. [Management of complications after revascularization due to peripheral arterial occlusive disease : Prophylaxis and consistent adequate therapy after timely diagnostics]. Chirurg 2015; 86:641-9. [PMID: 26138013 DOI: 10.1007/s00104-015-0042-8] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
BACKGROUND Complications are a threat to successful revascularization for treatment of perpheral arterial occlusive disease (PAOD) and must, therefore, be either primarily prevented or effectively treated after having occurred. OBJECTIVES The aim of this article is to give a survey of possible complications after revascularization for treatment of PAOD and their management. MATERIAL AND METHODS A systematic literature review was performed in PubMed and Medline. The analysis mainly considered recent publications with a higher level of evidence. RESULTS Revascularization for treatment of PAOD can basically be performed by an open surgical approach, an endovascular approach or as a combination of both methods (hybrid operation). The spectrum of possible complications varies accordingly. A differentiation can be made between bleeding, ischemic and systemic complications as well as between vascular and non-vascular complications. Optimal management of complications begins with primary prophylaxis and further includes a timely diagnosis and treatment of established complications. The best prophylaxis consists of a high quality of indications and performance of revascularization. CONCLUSION Optimal management of complications is essential and of utmost importance for successful revascularization to treat PAOD.
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Affiliation(s)
- R I Rückert
- Klinik für Gefäß- und endovaskuläre Chirurgie, Allgemein- und Viszeralchirurgie, Franziskus-Krankenhaus, Akademisches Lehrkrankenhaus, Charité - Universitätsmedizin Berlin, Budapester Str. 15-19, 10787, Berlin, Deutschland,
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Sano M, Yousefi S, Xing L. WE-EF-210-07: Development of a Minimally Invasive Photo Acoustic Imaging System for Early Prostate Cancer Detection. Med Phys 2015. [DOI: 10.1118/1.4926030] [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: 11/07/2022] Open
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Simon D, Radonjic-Hösli S, Straumann A, Yousefi S, Simon HU. Active eosinophilic esophagitis is characterized by epithelial barrier defects and eosinophil extracellular trap formation. Allergy 2015; 70:443-52. [PMID: 25620273 DOI: 10.1111/all.12570] [Citation(s) in RCA: 98] [Impact Index Per Article: 10.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 12/25/2014] [Indexed: 12/31/2022]
Abstract
BACKGROUND Eosinophilic esophagitis (EoE) exhibits esophageal dysfunction owing to an eosinophil-predominant inflammation. Activated eosinophils generate eosinophil extracellular traps (EETs) able to kill bacteria. There is evidence of an impaired barrier function in EoE that might allow pathogens to invade the esophagus. This study aimed to investigate the presence and distribution of EETs in esophageal tissues from EoE patients and their association with possible epithelial barrier defects. METHODS Anonymized tissue samples from 18 patients with active EoE were analyzed. The presence of DNA nets associated with eosinophil granule proteins forming EETs and the expression of filaggrin, the protease inhibitor lympho-epithelial Kazal-type-related inhibitor (LEKTI), antimicrobial peptides, and cytokines were evaluated by confocal microscopy following immune fluorescence staining techniques. RESULTS Eosinophil extracellular trap formation occurred frequently and was detected in all EoE samples correlating with the numbers of infiltrating eosinophils. While the expression of both filaggrin and LEKTI was reduced, epithelial antimicrobial peptides (human beta-defensin-2, human beta-defensin-3, cathelicidin LL-37, psoriasin) and cytokines (TSLP, IL-25, IL-32, IL-33) were elevated in EoE as compared to normal esophageal tissues. There was a significant correlation between EET formation and TSLP expression (P = 0.02) as well as psoriasin expression (P = 0.016). On the other hand, a significant negative correlation was found between EET formation and LEKTI expression (P = 0.016). CONCLUSION Active EoE exhibits the presence of EETs. Indications of epithelial barrier defects in association with epithelial cytokines are also present which may have contributed to the activation of eosinophils. The formation of EETs could serve as a firewall against the invasion of pathogens.
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Affiliation(s)
- D. Simon
- Department of Dermatology; Inselspital, Bern University Hospital; Bern Switzerland
| | | | | | - S. Yousefi
- Institute of Pharmacology; University of Bern; Bern Switzerland
| | - H.-U. Simon
- Institute of Pharmacology; University of Bern; Bern Switzerland
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Rožman S, Yousefi S, Oberson K, Kaufmann T, Benarafa C, Simon HU. The generation of neutrophils in the bone marrow is controlled by autophagy. Cell Death Differ 2014; 22:445-56. [PMID: 25323583 DOI: 10.1038/cdd.2014.169] [Citation(s) in RCA: 91] [Impact Index Per Article: 9.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2014] [Revised: 09/04/2014] [Accepted: 09/09/2014] [Indexed: 11/09/2022] Open
Abstract
Autophagy has been demonstrated to have an essential function in several cellular hematopoietic differentiation processes, for example, the differentiation of reticulocytes. To investigate the role of autophagy in neutrophil granulopoiesis, we studied neutrophils lacking autophagy-related (Atg) 5, a gene encoding a protein essential for autophagosome formation. Using Cre-recombinase mediated gene deletion, Atg5-deficient neutrophils showed no evidence of abnormalities in morphology, granule protein content, apoptosis regulation, migration, or effector functions. In such mice, however, we observed an increased proliferation rate in the neutrophil precursor cells of the bone marrow as well as an accelerated process of neutrophil differentiation, resulting in an accumulation of mature neutrophils in the bone marrow, blood, spleen, and lymph nodes. To directly study the role of autophagy in neutrophils, we employed an in vitro model of differentiating neutrophils that allowed modulating the levels of ATG5 expression, or, alternatively, intervening pharmacologically with autophagy-regulating drugs. We could show that autophagic activity correlated inversely with the rate of neutrophil differentiation. Moreover, pharmacological inhibition of p38 MAPK or mTORC1 induced autophagy in neutrophilic precursor cells and blocked their differentiation, suggesting that autophagy is negatively controlled by the p38 MAPK-mTORC1 signaling pathway. On the other hand, we obtained no evidence for an involvement of the PI3K-AKT or ERK1/2 signaling pathways in the regulation of neutrophil differentiation. Taken together, these findings show that, in contrast to erythropoiesis, autophagy is not essential for neutrophil granulopoiesis, having instead a negative impact on the generation of neutrophils. Thus, autophagy and differentiation exhibit a reciprocal regulation by the p38-mTORC1 axis.
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Affiliation(s)
- S Rožman
- Institute of Pharmacology, University of Bern, Bern CH-3010, Switzerland
| | - S Yousefi
- Institute of Pharmacology, University of Bern, Bern CH-3010, Switzerland
| | - K Oberson
- Institute of Pharmacology, University of Bern, Bern CH-3010, Switzerland
| | - T Kaufmann
- Institute of Pharmacology, University of Bern, Bern CH-3010, Switzerland
| | - C Benarafa
- Theodor Kocher Institute, University of Bern, Bern CH-3012, Switzerland
| | - H U Simon
- Institute of Pharmacology, University of Bern, Bern CH-3010, Switzerland
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Rückert RI, Hanack U, Aronés-Gomez S, Yousefi S. [Aneurysms of the abdominal aorta and iliac arteries: paradigm shift - operative therapy, if possible endovascular?]. Chirurg 2014; 85:782-90. [PMID: 25200628 DOI: 10.1007/s00104-014-2718-x] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [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: 11/25/2022]
Abstract
BACKGROUND Therapy of abdominal aortic aneurysms (AAA) is currently based on a high level of evidence. This is not true in the same manner for iliac artery aneurysms (IAA) which are frequently associated with AAAs and occur only rarely as isolated lesions. The therapeutic principles apply in the same way to both aneurysm locations. OBJECTIVES New findings, improved perioperative care and the rapid development of minimally invasive techniques require a constant update which is the aim of this article concerning the therapy of AAAs and IAAs. MATERIAL AND METHODS A systematic literature review was performed in PubMed and Medline and priority was given to recent publications with a high level of evidence. RESULTS Endovascular aneurysm repair (EVAR) and open aneurysm repair (OAR) result in a similar long-term survival. The perioperative survival advantage with EVAR persists only during medium-term postoperative courses. The reintervention rate after EVAR is substantially higher compared to OAR. For older patients and those who are considered unfit for OAR the expected benefits from EVAR has not been proven to date. Aneurysmal ruptures after EVAR demonstrate that a life-long surveillance of these patients is necessary. CONCLUSION Therapy of AAAs and IAAs is increasingly being performed by EVAR. Even the majority of complex aneurysms are amenable to minimally invasive treatment. Nevertheless, indications for OAR continue to exist. Screening for AAAs results in a decrease of aneurysmal ruptures for which EVAR is also gaining importance.
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Affiliation(s)
- R I Rückert
- Klinik für Gefäß- und endovaskuläre Chirurgie, Allgemein- und Viszeralchirurgie Franziskus-Krankenhaus, Akademisches Lehrkrankenhaus der Charité, Universitätsmedizin Berlin, Budapester Str. 15-19, 10787, Berlin, Deutschland,
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Abstract
Evaluation of similarity measures for image registration is a challenging problem due to its complex interaction with the underlying optimization, regularization, image type and modality. We propose a single performance metric, named robustness, as part of a new evaluation method which quantifies the effectiveness of similarity measures for brain image registration while eliminating the effects of the other parts of the registration process. We show empirically that similarity measures with higher robustness are more effective in registering degraded images and are also more successful in performing intermodal image registration. Further, we introduce a new similarity measure, called normalized spatial mutual information, for 3D brain image registration whose robustness is shown to be much higher than the existing ones. Consequently, it tolerates greater image degradation and provides more consistent outcomes for intermodal brain image registration.
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Affiliation(s)
- Q. R. Razlighi
- Department of Neurology, Columbia University, New York, NY 10032, USA
| | - N. Kehtarnavaz
- Department of Electrical Engineering, University of Texas at Dallas, Richardson, TX 75080 USA
| | - S. Yousefi
- Department of Electrical Engineering, University of Texas at Dallas, Richardson, TX 75080 USA
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Yousefi S, Nahaei M, Farajnia S, Akhi M, Ghotaslou R, Lotfipour F, Soroush M. Metallo-β-Lactamase-ProducingPseudomonas aeruginosain Two Iranian Teaching Hospitals, Their Antimicrobial Susceptibility and Serotypes. J Chemother 2013; 23:114-6. [DOI: 10.1179/joc.2011.23.2.114] [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: 10/31/2022]
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Yousefi S, Rahimian H, Nabavi SM, Glasby CJ. Yousefi, S., Rahimian, H., Nabavi, S.M.B. & Glasby, C.J. (2011) Nereididae (Annelida: Polychaeta) from intertidal habitats in the Gulf of Oman, Iran. Zootaxa, 3013, 48–64. Zootaxa 2013. [DOI: 10.11646/zootaxa.3636.3.8] [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: 11/04/2022]
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Abstract
Extracellular DNA traps are part of the innate immune response and are seen with many infectious, allergic, and autoimmune diseases. They can be generated by several different leukocytes, including neutrophils, eosinophils, and monocytes, as well as mast cells. Here, we review the composition of these extracellular DNA-containing structures as well as potential mechanisms for their production and function. In general, extracellular DNA traps have been described as binding to and killing pathogens, particularly bacteria, fungi, but also parasites. On the other hand, it is possible that DNA traps contribute to immunopathology in chronic inflammatory diseases, such as bronchial asthma. In addition, it has been demonstrated that they can initiate and/or potentiate autoimmune diseases. Extracellular DNA traps represent a frequently observed phenomenon in inflammatory diseases, and they appear to participate in the cross-talk between different immune cells. These new insights into the pathogenesis of inflammatory diseases may open new avenues for targeted therapies.
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Affiliation(s)
- D. Simon
- Department of Dermatology; Inselspital; Bern University Hospital; Bern; Switzerland
| | - H.-U. Simon
- Institute of Pharmacology; University of Bern; Bern; Switzerland
| | - S. Yousefi
- Institute of Pharmacology; University of Bern; Bern; Switzerland
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Tsilimparis N, Faber E, Zindler K, Mohammad W, Hanack U, Yousefi S, Rückert R. Aneurysma der A. profunda femoris - Eine systematische Literaturanalyse. Zentralbl Chir 2013. [DOI: 10.1055/s-0032-1328186] [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: 10/27/2022]
Affiliation(s)
- N. Tsilimparis
- Klinik für Allgemein-, Visceral-, Gefäß- und Thoraxchirurgie, Charité, Universitätsmedizin Berlin, Deutschland
| | - E. Faber
- Chirurgische Klinik, Franziskus-Krankenhaus, Berlin, Deutschland
| | - K. Zindler
- Chirurgische Klinik, Franziskus-Krankenhaus, Berlin, Deutschland
| | - W. Mohammad
- Chirurgische Klinik, Franziskus-Krankenhaus, Berlin, Deutschland
| | - U. Hanack
- Chirurgische Klinik, Franziskus-Krankenhaus, Berlin, Deutschland
| | - S. Yousefi
- Chirurgische Klinik, Franziskus-Krankenhaus, Berlin, Deutschland
| | - R. Rückert
- Chirurgische Klinik, Franziskus-Krankenhaus, Berlin, Deutschland
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Tsilimparis N, Faber E, Zindler K, Mohammad W, Hanack U, Yousefi S, Rückert RI. [Aneurysms of the deep femoral artery: a systematic review of literature]. Zentralbl Chir 2012; 137:430-5. [PMID: 23136103 DOI: 10.1055/s-0032-1327820] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
INTRODUCTION True aneurysms of the deep femoral artery (APFA) are rare and are usually presented as case reports. Recommendations for diagnostics and therapy of APFAs are based on low-level evidence only. The purpose of this paper was to summarise the existing world experience with APFA. MATERIAL/METHODS On the occasion of our own case a systematic review of the literature was performed for diagnostics and therapy for true APFA. Publications retrieved from PubMed, EMBASE, and the Cochrane Collaboration as well as by hand search from their references were reviewed. RESULTS From 2002 onwards 25 papers on true APFAs were published in the English and German literature. Apart from two retrospective studies over a longer period of time these were exclusively case reports. A total of 55 true APFAs were reported in 47 patients with a mean age of 63 years. Therapeutic intervention was due to a rupture in 10 cases (18 %). The mean maximal diameter of APFA at presentation was 5.4 cm (2-18 cm). APFAs that were not ruptured presented frequently as a painful pulsatile mass in the groin and thigh. Therapeutic options for APFA included, apart from surgical resection with or without reconstruction of the deep femoral artery, the endovascular repair. DISCUSSION Symptoms of swelling and pain in the presence of a mass at the proximal thigh should raise the suspicion of an APFA. Surgical therapy should be performed electively in APFAs with a diameter of more than 2 cm or in cases of rapid progression as well as in all symptomatic or ruptured cases. The endovascular approach should be considered as an alternative option in all cases.
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Affiliation(s)
- N Tsilimparis
- Klinik für Allgemein-, Visceral-, Gefäß- und Thoraxchirurgie, Charité, Universitätsmedizin Berlin, Deutschland.
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Yousefi S, Azari MA. Genetic effect of growth hormone gene on yearling weight and wool traits in Zel sheep (Brief Report). Arch Anim Breed 2012. [DOI: 10.5194/aab-55-303-2012] [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] [Indexed: 11/11/2022] Open
Abstract
Abstract. The growth hormoe (GH) gene is a candidate for growth in sheep, since plays an important role in growth regulation and development (Boyd & Bauman 1989). Most genetic studies on the growth of sheep have concentrated on birth weight, weaning weight and yearling weight (Bathaei & Leroy 1998). Pereira et al. (2005) found significant effect for bovine growth hormone (bGH) genotype on yearling weight. Tambasco et al. (2003) observed a positive association between genotype LV and daily body weight gain from weaning to yearling in Bos Taurs x Bos indicus crosses. Wool traits like greasy fleece weight, clean yield, fiber diameter and its coefficient of variation are very important selection goals in sheep breeding programs, however new traits such as staple strength and staple length are of increasing importance in the wool industry (Forgarty 2006). Initial observations using daily injections of crude pituitary extracts showed that wool growth decreased by 17 % during the second treatment period (Ferguson 1954). Allain et al. (1998) found segregation for coefficient of variation of fiber diameter and staple length on chromosomes 3 and 4 in a composite sheepline (INRA401). Zel sheep is raised in North of Iran. This sheep is a native non-fat tailed breed with small-sized (Saadat-Noori & Siah-Mansoor 1990). The aim of this study was to investigate the relationship between GH genotypes and wool traits and yearling weight using single strand conformation polymorphism (SSCP) method in Zel sheep.
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Morshed M, Yousefi S, Stöckle C, Simon HU, Simon D. Thymic stromal lymphopoietin stimulates the formation of eosinophil extracellular traps. Allergy 2012; 67:1127-37. [PMID: 22764833 DOI: 10.1111/j.1398-9995.2012.02868.x] [Citation(s) in RCA: 94] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 05/31/2012] [Indexed: 12/12/2022]
Abstract
BACKGROUND Thymic stromal lymphopoietin (TSLP) that is released by epithelial cells upon certain environmental triggers activates cells of the innate and adaptive immune system resulting in a preferential T helper 2 immune response. By releasing eosinophil extracellular traps (EETs), eosinophils achieve an efficient extracellular bacterial killing. Eosinophil extracellular traps release, however, has been observed in both infectious and noninfectious eosinophilic diseases. Here, we aim to investigate whether eosinophils generate functional EETs as a direct response to TSLP, and further to study the extra- and intracellular mechanisms involved in this process as well as TSLP receptor (TSLPR) expression by eosinophils in vitro and in vivo. METHODS Thymic stromal lymphopoietin receptor expression on blood and tissue eosinophils was assessed by immunoblotting, flow cytometry, and immunofluorescence staining. Purified eosinophils were stimulated with recombinant human TSLP. The release of extracellular DNA in association with eosinophilic cationic protein (ECP) was detected by fluorescence staining techniques and confocal microscopy. In addition, cell survival, cell adhesion, production of reactive oxygen species (ROS), and the inhibition of bacterial growth by TSLP-stimulated eosinophils were measured. RESULTS Thymic stromal lymphopoietin receptor was observed on peripheral blood eosinophils as well as on tissue infiltrating eosinophils in skin diseases. TSLP did not affect eosinophil survival, but induced the formation of EETs consisting of mitochondrial DNA in association with ECP in a concentration- and time-dependent manner. Eosinophil extracellular trap release could be inhibited by blocking either cell adhesion or ROS production. While eosinophils prevented the growth of both Staphylococcus aureus and Staphylococcus epidermidis, the latter were unable to elicit EET formation and eosinophils required additional TSLP stimulation to achieve this antibacterial activity. CONCLUSIONS thymic stromal lymphopoietin directly stimulates eosinophils to produce EETs. Our observations link epithelial TSLP expression triggered by environmental factors with pathogen defense mechanisms involving eosinophils.
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Affiliation(s)
| | - S. Yousefi
- Institute of Pharmacology; University of Bern; Bern; Switzerland
| | - C. Stöckle
- Institute of Pharmacology; University of Bern; Bern; Switzerland
| | - H.-U. Simon
- Institute of Pharmacology; University of Bern; Bern; Switzerland
| | - D. Simon
- Department of Dermatology, Inselspital; Bern University Hospital; University of Bern; Bern; Switzerland
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Yousefi S, Kehtarnavaz N, Gholipour A. Improved Labeling of Subcortical Brain Structures in Atlas-Based Segmentation of Magnetic Resonance Images. IEEE Trans Biomed Eng 2012; 59:1808-17. [DOI: 10.1109/tbme.2011.2122306] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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Kerstan A, Simon H, Yousefi S, Leverkus M. Extensive accumulation of eosinophil extracellular traps in bullous delayed‐pressure urticaria: a pathophysiological link? Br J Dermatol 2012; 166:1151-2. [DOI: 10.1111/j.1365-2133.2012.10848.x] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Affiliation(s)
- A. Kerstan
- Department of Dermatology, Venereology and Allergology, University Hospital of Würzburg, Würzburg, Germany
| | - H.‐U. Simon
- Institute of Pharmacology, University of Bern, Bern, Switzerland
| | - S. Yousefi
- Institute of Pharmacology, University of Bern, Bern, Switzerland
| | - M. Leverkus
- Section of Molecular Dermatology, Department of Dermatology, Venereology and Allergology, University Hospital of Mannheim, University of Heidelberg, Mannheim, Germany
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Kaykhaei MA, Hashemi M, Narouie B, Shikhzadeh A, Jahantigh M, Shirzaei E, Rezazehi B, Hoseinian M, Yousefi S, Masoudian S, Emamdadi A, Alavi SF, Mashhadi R, Ansari H. Prevalence of metabolic syndrome in adult population from zahedan, southeast iran. Iran J Public Health 2012; 41:70-6. [PMID: 23113137 PMCID: PMC3481671] [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] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/12/2011] [Accepted: 01/11/2012] [Indexed: 11/20/2022]
Abstract
BACKGROUND The metabolic syndrome (MES) is associated with a high risk of diabetes and cardiovascular disease. The aim of the present study was to determine the prevalence of the metabolic syndrome as well as cut-off points for waist circumference (WC) for diagnosis of MES in Zahedan, southeast Iran. METHODS Totally, 1802 people (735 men and 1067 women) with metabolic syndrome were surveyed according to National Cholesterol Education Program Adult Treatment Panel III (NCEP ATP III) and the International Diabetes Federation (IDF) criteria as well as obtained WC cut-off points for IDF criteria. RESULTS The prevalence of metabolic syndrome was higher in women than in men. In both sexes the prevalence increased with age. The prevalence of metabolic syndrome among 1802 individuals aged ≥19 years according to NCEP ATP III, IDF and IDF -AHA/NHLBI were 21.0% (15.4% in male, 24.9% female), 24.8 (20.0% in male, 28.1% in female) and 23.3% (19.7% in male, 25.8% in female), respectively. Low HDL-C (60.6%) and high WC (43.3%) were the most common components of the metabolic syndrome, followed by high triglycerides (32%), elevated glucose (17.1%) and high blood pressure (13%). CONCLUSION Our data shows a high prevalence of MES in Zahedan, Southeast Iran, therefore, future health prevention strategies are required for the prevention of MES.
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Affiliation(s)
- MA Kaykhaei
- Dept. of Internal Medicine, School of Medicine, Zahedan University of Medical Sciences, Zahedan, Iran
| | - M Hashemi
- Cellular and Molecular Research Center, Zahedan University of Medical Sciences, Zahedan, Iran,Dept. of Clinical Biochemistry, School of Medicine, Zahedan University of Medical Sciences, Zahedan, Iran,Corresponding Author: E-mail address:
| | - B Narouie
- Clinical Research Development Center (CRDC), Ali-Ebne-Abitaleb Hospital, Zahedan University of Medical Sciences, Zahedan, Iran
| | - A Shikhzadeh
- Clinical Research Development Center (CRDC), Ali-Ebne-Abitaleb Hospital, Zahedan University of Medical Sciences, Zahedan, Iran
| | - M Jahantigh
- Clinical Research Development Center (CRDC), Ali-Ebne-Abitaleb Hospital, Zahedan University of Medical Sciences, Zahedan, Iran
| | - E Shirzaei
- Clinical Research Development Center (CRDC), Ali-Ebne-Abitaleb Hospital, Zahedan University of Medical Sciences, Zahedan, Iran
| | - B Rezazehi
- Clinical Research Development Center (CRDC), Ali-Ebne-Abitaleb Hospital, Zahedan University of Medical Sciences, Zahedan, Iran
| | - M Hoseinian
- Clinical Research Development Center (CRDC), Ali-Ebne-Abitaleb Hospital, Zahedan University of Medical Sciences, Zahedan, Iran
| | - S Yousefi
- Clinical Research Development Center (CRDC), Ali-Ebne-Abitaleb Hospital, Zahedan University of Medical Sciences, Zahedan, Iran
| | - S Masoudian
- Clinical Research Development Center (CRDC), Ali-Ebne-Abitaleb Hospital, Zahedan University of Medical Sciences, Zahedan, Iran
| | - A Emamdadi
- Clinical Research Development Center (CRDC), Ali-Ebne-Abitaleb Hospital, Zahedan University of Medical Sciences, Zahedan, Iran
| | - SF Alavi
- Clinical Research Development Center (CRDC), Ali-Ebne-Abitaleb Hospital, Zahedan University of Medical Sciences, Zahedan, Iran
| | - R Mashhadi
- Clinical Research Development Center (CRDC), Ali-Ebne-Abitaleb Hospital, Zahedan University of Medical Sciences, Zahedan, Iran
| | - H Ansari
- Dept. of Biostatistics, School of Public Health, Zahedan University of Medical Sciences, Zahedan, Iran
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Yousefi S, Kehtarnavaz N, Gholipour A. Synthesis of cervical tissue second harmonic generation images using Markov random field modeling. Annu Int Conf IEEE Eng Med Biol Soc 2012; 2011:6180-3. [PMID: 22255750 DOI: 10.1109/iembs.2011.6091526] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
This paper presents a statistical image modeling approach based on Markov random field to synthesize cervical tissue second harmonic generation (SHG) images. Binary images representing fiber and pore areas of the cervix tissue are first obtained from SHG images using an image processing pipeline consisting of noise removal, contrast enhancement and optimal thresholding. These binary images are modeled using a Markov random field whose parameters are estimated via the least squares method. The parameters are then used to synthesize fiber and pore areas of cervical tissue in the form of binary images. The effectiveness of the synthesis is demonstrated by reporting the classification outcome for two classes of cervical SHG images collected from mice at two different stages of normal pregnancy. The developed synthesis allows generation of realistic fiber and pore area binary images for cervical tissue studies.
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Affiliation(s)
- S Yousefi
- Department of Electrical Engineering, University of Texas at Dallas, Richardson, TX, USA
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Tsilimparis N, Hanack U, Pisimisis G, Yousefi S, Wintzer C, Rückert R. Thrombus in the Non-aneurysmal, Non-atherosclerotic Descending Thoracic Aorta – An Unusual Source of Arterial Embolism. J Vasc Surg 2011. [DOI: 10.1016/j.jvs.2011.02.045] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [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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Yousefi S, Kehtarnavaz N, Akins M, Luby-Phelps K, Mahendroo M. Separation of preterm infection model from normal pregnancy in mice using texture analysis of second harmonic generation images. Annu Int Conf IEEE Eng Med Biol Soc 2011; 2010:5314-7. [PMID: 21096067 DOI: 10.1109/iembs.2010.5626349] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
This paper presents an image processing system to distinguish a lipopolysaccharide (LPS) infection model of preterm labor from normal mouse pregnancy using Second Harmonic Generation (SHG) images of mouse cervix. Two classes of SHG images are considered: images from mice in which premature birth was caused by intrauterine LPS administration and images from normal pregnant mice. A wide collection of image texture features consisting of co-occurrence matrix-based, granulometry-based and wavelet-based are examined. The results obtained indicate that the combination of co-occurrence-based and granulometry-based textures features provides the most effective texture set for separating these two classes of images.
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Affiliation(s)
- S Yousefi
- Department of Electrical Engineering, University of Texas at Dallas, Richardson, TX, USA
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Yousefi S, Nahaei MR, Farajnia S, Ghojazadeh M, Akhi MT, Sharifi Y, Milani M, Ghotaslou R. Class 1 integron and Imipenem Resistance in Clinical Isolates of Pseudomonas aeruginosa: Prevalence and Antibiotic Susceptibility. Iran J Microbiol 2010; 2:115-21. [PMID: 22347559 PMCID: PMC3279778] [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] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
BACKGROUND AND OBJECTIVES Pseudomonas aeruginosa is one of the most important causative agents of nosocomial infections especially in ICU and burn units. P. aeruginosa infections are normally difficult to eradicate due to acquired resistance to many antibiotics. Recent appearance of carbapenem resistant P. aeruginosa isolates is considered a major healthcare problem. The present study was conducted to detect class 1 integron and antibiotic susceptibility profiles of imipenem-sensitive and resistant clinical isolates of P. aeruginosa. MATERIALS AND METHODS Antibiotic susceptibility profiles and minimum inhibitory concentration against imipenem was studied in 160 clinical isolates of P. aeruginosa by disk agar diffusion method and Etest, respectively. Detection of class 1 integron was performed by the PCR method. Demographic and microbiological data were compared between imipenem susceptible and non-susceptible isolates by the SPSS software. RESULTS PCR results showed that 90 (56.3%) of P. aeruginosa isolates carried class 1 integron. Antibiotic susceptibility results revealed that 93 (58.1%) were susceptible and 67 (41.9%) were non-susceptible to imipenem. Comparison of antibiotic susceptibility patterns showed high level of drug resistance among imipenem non-susceptible isolates. We found that MDR phenotype, presence of class 1 integron and hospitalization in ICU and burn units were significantly associated with imipenem non-susceptible isolates. CONCLUSION The high frequency of imipenem resistance was seen among our P. aeruginosa isolates. Since carbapenems are considered as the last drugs used for treatment of P. aeruginosa infections, it is crucial to screen imipenem non-susceptible isolates in infection control and optimal therapy.
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Affiliation(s)
- S Yousefi
- Drug Applied Research Center, Tabriz University of Medical Sciences, Tabriz, Iran,Microbiology Department, Faculty of Medicine, Tabriz University of Medical Sciences, Tabriz, Iran,Clinical microbiology laboratory of Imam Hospital, Orumieh University of Medical Sciences
| | - MR Nahaei
- Drug Applied Research Center, Tabriz University of Medical Sciences, Tabriz, Iran,Microbiology Department, Faculty of Medicine, Tabriz University of Medical Sciences, Tabriz, Iran,Corresponding author: Mohammad Reza Nahaei Ph.D Address: Department of Medical Microbiology and Drug Applied Research Center, Faculty of Medicine, Tabriz University of Medical Sciences, Tabriz, Iran. Tel: +98-4113364661. Fax: +98-4113364661. E-mail:
| | - S Farajnia
- Biotechnology Research Center, Tabriz University of Medical Sciences, Tabriz, Iran
| | - M Ghojazadeh
- Physiology Department, Faculty of Medicine, Tabriz University of Medical Sciences, Tabriz, Iran
| | - MT Akhi
- Drug Applied Research Center, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Y Sharifi
- Clinical microbiology laboratory of Imam Hospital, Orumieh University of Medical Sciences
| | - M Milani
- Drug Applied Research Center, Tabriz University of Medical Sciences, Tabriz, Iran
| | - R Ghotaslou
- Drug Applied Research Center, Tabriz University of Medical Sciences, Tabriz, Iran
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Golian S, Yousefi S. P901 Survey of the attitude toward contraceptive use and the rate of contraceptive use among the women who referred to the health centers during the first two years after child bearing. Int J Gynaecol Obstet 2009. [DOI: 10.1016/s0020-7292(09)62389-4] [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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Tsilimparis N, Laipple A, Yousefi S, Alevizakos P, Spring BI, Rogalla P, Hagemann J, Hanack U, Rückert RI. [Role of endovascular therapy for redo surgery in patients after aortoiliac aneurysm exclusion]. Zentralbl Chir 2009; 134:331-7. [PMID: 19688682 DOI: 10.1055/s-0028-1098771] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Abstract
INTRODUCTION Redo surgery or reintervention following conventional or endovascular aortoiliac reconstruction often requires exclusion of new aneurysms. In the present study the potentials of endovascular management of such lesions are investigated. METHODS All patients with endovascular reoperation for of newly developed aortoiliac aneurysms were identified from a prospectively run data-base. The indications and results of endovascular therapy were analysed retrospectively. In detail, data were analysed for the type of original operation, interval until and kind of reoperation, and results concerning survival, technical success and complications. RESULTS From 12 / 2003 through 3 / 2007 195 patients with aortoiliac aneurysms were operated. Endovascular repair was performed in 15 cases of previously excluded aneurysms. Mean age of these 15 patients (12 men) was 73 (64-85) years. Ten patients had a primary conventional (group A) and 5 patients had a primary endovascular (group B) aneurysm repair. The mean time interval between the first and second operation was 8.9 (1-26) years. The secondary endovascular therapy in group A was successful in all cases. In group B endoleaks type I a (n = 1), I a / b (n = 1), II (n = 2) and III (n = 1) were treated. One type II endoleak could only be treated successfully by conversion to open repair, the other one was successfully treated by reintervention. All but one patient are alive and -remained free of pathological findings during a median follow-up of 13 (2-39) months. DISCUSSION Because of the clearly elevated operation risk of redo surgery after conventional or endovascular aneurysm repair, endovascular aneurysm exclusion represents the method of first choice. The reasonable selection and combination of procedures allows for an optimal adaptation of therapy to the individual case.
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Salemi S, Yousefi S, Simon D, Schmid I, Moretti L, Scapozza L, Simon HU. A novel FIP1L1-PDGFRA mutant destabilizing the inactive conformation of the kinase domain in chronic eosinophilic leukemia/hypereosinophilic syndrome. Allergy 2009; 64:913-8. [PMID: 19210352 DOI: 10.1111/j.1398-9995.2009.01943.x] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.3] [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: 01/21/2023]
Abstract
BACKGROUND The Fip1-like-1-platelet-derived growth factor receptor alpha (FIP1L1-PDGFRA) gene fusion is a common cause of chronic eosinophilic leukemia (CEL)/hypereosinophilic syndrome (HES), and patients suffering from this particular subgroup of CEL/HES respond to low-dose imatinib therapy. However, some patients may develop imatinib resistance because of an acquired T674I mutation, which is believed to prevent drug binding through steric hindrance. METHODS In an imatinib resistant FIP1L1-PDGFRA positive patient, we analyzed the molecular structure of the fusion gene and analyzed the effect of several kinase inhibitors on FIP1L1-PDGFRA-mediated proliferative responses in vitro. RESULTS Sequencing of the FIP1L1-PDGFRA fusion gene revealed the occurrence of a S601P mutation, which is located within the nucleotide binding loop. In agreement with the clinical observations, imatinib did not inhibit the proliferation of S601P mutant FIP1L1-PDGFRA-transduced Ba/F3 cells. Moreover, sorafenib, which has been described to inhibit T674I mutant FIP1L1-PDGFRA, failed to block S601P mutant FIP1L1-PDGFRA. Structural modeling revealed that the newly identified S601P mutated form of PDGFRA destabilizes the inactive conformation of the kinase domain that is necessary to bind imatinib as well as sorafenib. CONCLUSIONS We identified a novel mutation in FIP1L1-PDGFRA resulting in both imatinib and sorafenib resistance. The identification of novel drug-resistant FIP1L1-PDGFRA variants may help to develop the next generation of target-directed compounds for CEL/HES and other leukemias.
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Affiliation(s)
- S Salemi
- Institute of Pharmacology, University of Bern, Bern, Switzerland
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Arbabi M, Nejatisafa A, Mohammadi M, Yousefi S, Mahdavian S, Izadi S, Berzins K. The prevalence and experience of harrassment of people with mental health problems living in the community in Iran. Eur Psychiatry 2008. [DOI: 10.1016/j.eurpsy.2008.01.1258] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/29/2022] Open
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Abstract
G protein-coupled receptor (GPR)109A (HM74A) is a G(i) protein-coupled receptor, which is activated by nicotinic acid (NA), a lipid-lowering drug. Here, we demonstrate that mature human neutrophils, but not eosinophils, express functional GPR109A receptors. The induction of the GPR109A gene appears to occur late in the terminal differentiation process of neutrophils, since a mixed population of immature bone marrow neutrophils did not demonstrate evidence for its expression. NA accelerated apoptosis in cultured neutrophils in a concentration-dependent manner, as assessed by phosphatidylserine redistribution, caspase-3 activation, and DNA fragmentation assays. The pro-apoptotic effect of NA was abolished by pertussis toxin, which was used to block G(i) proteins, suggesting a receptor-mediated mechanism. Activation of GPR109A by NA resulted in decreased levels of cyclic adenosine monophosphate (cAMP), most likely due to G(i)-mediated inhibition of adenylyl cyclase activity. NA-induced apoptosis was reversed by the addition of cell-permeable cAMP, pointing to the possibility that reduced cAMP levels promote apoptosis in neutrophils. Distal mechanism involved in this process may include the post-translational modification of members of the Bcl-2 family, such as dephosphorylation of pro-apoptotic Bad and antiapoptotic Mcl-1 proteins. Taken together, following maturation in the bone marrow, neutrophils express functional GPR109A receptors, which might be involved in the regulation of neutrophil numbers. Moreover, this study identified a new cellular target of NA and future drugs activating GPR109A receptors, the mature neutrophil.
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Affiliation(s)
- G Kostylina
- Department of Pharmacology, University of Bern, Friedbühlstrasse 49, Bern, Switzerland
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Tsilimparis N, Alevizakos P, Yousefi S, Hanack U, Im Spring B, Blank B, Rückert RI. Endovaskuläre Therapie eines infrarenalen Aortenaneurysmas bei heterotopem Nierentransplantat. Zentralbl Chir 2007; 132:220-5; discussion 225-6. [PMID: 17610193 DOI: 10.1055/s-2007-981162] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [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: 10/23/2022]
Abstract
INTRODUCTION The indications for endovascular aortic aneurysm repair (EVAR) are mainly established in hostile abdomen, in patients with significant comorbidities which affect the general operability of the patient and, given the necessary infrastructure, also in ruptured aneurysm. Along to those, we present another possible indication in the presence of a kidney allograft in patients with aortic aneurysm. METHODS Based on a case report of aorto-biiliac stent-graft repair of an infrarenal aortic aneurysm in a patient with renal allograft, a systematic review of the literature was performed of all similar cases concerning surgical therapy in this constellation. RESULTS EVAR was performed using an aorto-biiliac system (Zenith) Trifab, COOK) in a 61-year-old male patient 11 years after heterotopic renal allotransplantation in the right iliac fossa. Preoperative renal function was normal. Because the donor renal artery was anastomosed to the recipient's external iliac artery the stent-graft was implanted from the left common femoral artery to minimize temporary allograft ischemia. The intra- and postoperative course was uneventful with a follow-up of presently 12 months. A primary type-II endoleak (retroleak from a lumbar artery) is being treated conservatively so far with embolization being a future option. At present there are 15 cases of EVAR in renal allograft patients that have been reported, all of them being successful. DISCUSSION All data existing in the literature reported to date as well as our own experience justify the first choice of EVAR in morphologically suitable cases. One major advantage of EVAR in this constellation is the avoidance of aortic cross clamping which poses the graft at risk of ischemia. Long-term results will be most important for definite assessment of EVAR. However, contrast media application during the operation and for CT surveillance should be considered as a major disadvantage.
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Affiliation(s)
- N Tsilimparis
- Chirurgische Klinik, Franziskus-Krankenhaus Berlin, Akademisches Lehrkrankenhaus der Charité--Universitätsmedizin Berlin
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Martinelli S, Kostylina G, Niggli V, Baumann C, Fey MF, Wendel HG, Lowe SW, Yousefi S, Simon HU. Targeting survivin via PI3K but not c-akt/PKB by anticancer drugs in immature neutrophils. Oncogene 2006; 25:6915-23. [PMID: 16715127 DOI: 10.1038/sj.onc.1209692] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.8] [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: 01/01/2023]
Abstract
Myelosuppression is the most common unwanted side effect associated with the administration of anticancer drugs, and infections remain a common cause of death in chemotherapy-treated patients. Several mechanisms of the cytotoxicity of these drugs have been proposed and may synergistically operate in a given cell. Survivin expression has been associated with cancer, but recent reports suggest that this molecule is also expressed in several immature and mature hematopoietic cells. Here, we provide evidence that treatment of immature neutrophils with anticancer drugs reduced endogenous survivin levels causing apoptosis. The anticancer drugs did not directly target survivin, instead they blocked the activity of phosphatidylinositol-3-OH kinase, which regulated survivin expression and apoptosis in these cells. Strikingly, and in contrast to other cells, this pathway did not involve the serine/threonine kinase c-akt/PKB. Moreover, in combination with anticancer drug therapy, rapamycin did not induce increased myelosuppression in an experimental lymphoma mouse model. These data suggest that drugs that block either c-akt/PKB or signaling molecules located distal to c-akt/PKB may preferentially induce apoptosis of cancer cells as they exhibit no cytotoxicity for immature neutrophils.
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Affiliation(s)
- S Martinelli
- Department of Pharmacology, University of Bern, Bern, Switzerland
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Simon D, Vassina E, Yousefi S, Braathen LR, Simon HU. Inflammatory cell numbers and cytokine expression in atopic dermatitis after topical pimecrolimus treatment. Allergy 2005; 60:944-51. [PMID: 15932386 DOI: 10.1111/j.1398-9995.2005.00798.x] [Citation(s) in RCA: 43] [Impact Index Per Article: 2.3] [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: 11/29/2022]
Abstract
BACKGROUND In several clinical trials the topical application of pimecrolimus was shown to be effective in the treatment of atopic dermatitis (AD). By targeting calcineurin-dependent signaling pathways, pimecrolimus controls cytokine gene expression. The purpose of this study was to investigate the effect of pimecrolimus on the inflammatory infiltrate and cytokine expression pattern in AD upon topical therapy. METHODS From 10 patients with acute AD, skin biopsies as well as immunophenotype and cytokine production of peripheral blood mononuclear cells (PBMC) were examined before and 3 weeks after therapy. RESULTS The clinical improvement was associated with a marked regression of histopathological features. In particular, the density of the inflammatory infiltrate mostly containing lymphocytes and eosinophils declined. By double immunofluorescent staining, a reduced expression of the T helper (Th) 2 cytokines interleukin (IL)-5, IL-10, and IL-13 in both CD4+ and CD8+ T cells was demonstrated after therapy. Pimecrolimus therapy was also associated with a reduced expression of the Th1 cytokine interferon (IFN)-gamma. Interestingly, the numbers of epidermal CD1a+ dendritic cells increased following treatment. In the peripheral blood, a decrease of lymphocytes and eosinophils was noticed, but the distribution of lymphocyte subpopulations and their capacity of cytokine production did not change. CONCLUSIONS Topical pimecrolimus exhibits anti-inflammatory effects in AD by reducing the inflammatory cell infiltrate and cytokine expression in the dermis.
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Affiliation(s)
- D Simon
- Department of Dermatology, University of Bern, Bern, Switzerland
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Simon D, Vassina E, Yousefi S, Braathen L, Simon H. Effects of topical pimecrolimus on skin histology, inflammatory infiltrate, and cytokine production in atopic dermatitis. J Allergy Clin Immunol 2005. [DOI: 10.1016/j.jaci.2004.12.1098] [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: 11/30/2022]
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Abstract
We have demonstrated cell membrane destruction activity by carboxylic acid derivatives (CADs) mainly tri-sodium citrate, in neoplastic cell lines and, to a far lesser extent, in normal human peripheral blood mononuclear cells (hPBMC). Flow cytometric (FACS) analysis was applied to Annexin-V and Propidium Iodide (PI) stained cells to evaluate the degree of the apoptosis induced by citrate in the following cell lines: CCRF-CEM (shortened to CEM), H9, and Jurkat (T-Cells), Raji and WIL2-NS (B-Cells), HL-60 (myeloblasts), K562 (myelocytes) and U937 (monocytes). We also tested normal hPBMC. Before staining with Annexin/PI, manual cell counts were performed on 24- and 48-h-old cell cultures. Cell supernatants were assayed for lactate dehydrogenase (LDH). LDH values in samples correlated with enhanced apoptosis by FACS analysis. For comparison, ascorbate and 2 other CADs including, acetate and lactate were also evaluated for the induction of apoptosis. In addition, the ability of tri-sodium citrate to induce apoptosis in the presence and the absence of several antineoplastic drugs, such as dexamethasone, arsenic trioxide, hydrocortisone, 6-mercaptopurine, and methotrexate were tested on Jurkat cells. FACS, LDH, and cell count values all demonstrated an enhanced degree of apoptotic cell death in Jurkat cells by citrate. In most of our investigated cells, except for the H9 cell line, citrate has induced a greater degree of apoptosis than acetate which induced a greater degree than lactate (see Fig. 1.0). The nature of the cell death by ascorbate appeared to be due to necrosis rather than apoptosis. Pilot studies on normal hPBMC showed that citrate alone or in combination with antineoplastic drugs caused minimal cell death. Thus citrate might be of benefit in some chemotherapy treatments in order to reduce drug toxicity or possibly enhance drug activities in certain neoplasias.
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Affiliation(s)
- S Yousefi
- University of California, Irvine Medical Center, Orange, CA 92868, USA.
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Yousefi S, Ma XZ, Singla R, Zhou YC, Sakac D, Bali M, Liu Y, Sahai BM, Branch DR. HIV-1 infection is facilitated in T cells by decreasing p56lck protein tyrosine kinase activity. Clin Exp Immunol 2003; 133:78-90. [PMID: 12823281 PMCID: PMC1808751 DOI: 10.1046/j.1365-2249.2003.02187.x] [Citation(s) in RCA: 20] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Several studies have suggested an important role for the protein tyrosine kinase p56lck (Lck) in HIV infection; however, the exact nature of this role remains unclear. Using a series of well characterized Jurkat-derived cell lines having a wide range of Lck kinase activity, our results showed that, while the entry of HIV-1 into these cell lines was similar, the kinetics of virus production by these cells were very different. Cells expressing a kinase-inactive Lck showed accelerated viral replication, whereas, cells expressing Lck with normal or elevated enzymatic activity showed a delay in virus replication that was proportional to the initial level of endogenous Lck activity. The cell line having the highest initial Lck kinase activity showed the slowest rate of productive HIV-1 infection. Analysis of 2-LTR circles revealed that this inhibitory effect of Lck was not due to inhibition of reverse transcription of HIV-1 genome or migration of the proviral DNA into the nuclei. This affect of Lck was confirmed in additional studies that used either the S1T cell line lacking completely Lck or where the Lck activity was altered in Jurkat cells prior to infection. S1T cells showed a 3- to 12-fold increase in the level of infection compared to Jurkat cells despite similar CD4 and chemokine coreceptor expression and cell doubling times. Pretreatment of Jurkat with an antisense lck oligodeoxynucleotide inhibited the synthesis of functional Lck and facilitated the viral replication by the cells as did expressing a dominant-negative mutant Lck which increased the productive infection>3-fold. Conversely, whereas IL-16 had no affect on productive infection in S1T cells that lack Lck, IL-16 pretreatment of Jurkat cells resulted in an immediate (within 5 min) and sustained and gradual (over 5 h) increase in Lck activity that resulted in a reduction of HIV-1 replication that paralleled the increasing Lck kinase activity. These results show that the enzymatic activity of Lck kinase can affect viral replication, that a lack of, or decreased Lck activity facilitates viral replication. Conversely, Lck can mediate a delay in HIV-1 infection that is proportional to the initial endogenous Lck enzyme activity.
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Affiliation(s)
- S Yousefi
- Department of Medicine, University of Toronto, Toronto, Ontario, Canada
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Yousefi S, Cooper PR, Potter SL, Mueck B, Jarai G. Cloning and expression analysis of a novel G-protein-coupled receptor selectively expressed on granulocytes. J Leukoc Biol 2001; 69:1045-52. [PMID: 11404393] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/20/2023] Open
Abstract
The migration of neutrophils into sites of acute and chronic inflammation is mediated by chemokines. We used degenerate-primer reverse transcriptase-polymerase chain reaction (RT-PCR) to analyze chemokine receptor expression in neutrophils and identify novel receptors. RNA was isolated from human peripheral blood neutrophils and from neutrophils that had been stimulated for 5 h with granulocyte-macrophage colony-stimulating factor or by coculturing with primary human bronchial epithelial cells. Amplification products were cloned, and clone redundancy was determined. Seven known G-protein-coupled receptors were identified among 38 clones-CCR1, CCR4, CXCR1, CXCR2, CXCR4, HM63, and FPR1-as well as a novel gene, EX33. The full-length EX33 clone was obtained, and an in silico approach was used to identify the putative murine homologue. The EX33 gene encodes a 396-amino-acid protein with limited sequence identity to known receptors. Expression studies of several known chemokine receptors and EX33 revealed that resting neutrophils expressed higher levels of CXCRs and EX33 compared with activated neutrophils. Northern blot experiments revealed that EX33 is expressed mainly in bone marrow, lung, and peripheral blood leukocytes. Using RT-PCR analysis, we showed more abundant expression of EX33 in neutrophils and eosinophils, in comparison with that in T- or B-lymphocytes, indicating cell-specific expression among leukocytes.
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MESH Headings
- Adult
- Amino Acid Sequence
- Base Sequence
- Blotting, Northern
- Blotting, Western
- Chemotaxis, Leukocyte/genetics
- Cloning, Molecular
- DNA, Complementary/genetics
- Gene Expression Profiling
- Gene Expression Regulation/drug effects
- Genes
- Granulocyte-Macrophage Colony-Stimulating Factor/pharmacology
- Humans
- Molecular Sequence Data
- Neutrophils/drug effects
- Neutrophils/metabolism
- Organ Specificity
- RNA, Messenger/genetics
- RNA, Messenger/isolation & purification
- Receptors, Cell Surface/biosynthesis
- Receptors, Cell Surface/genetics
- Receptors, Chemokine/biosynthesis
- Receptors, Chemokine/genetics
- Receptors, G-Protein-Coupled
- Reverse Transcriptase Polymerase Chain Reaction
- Sequence Alignment
- Sequence Homology, Amino Acid
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Affiliation(s)
- S Yousefi
- Novartis Horsham Research Centre, Horsham, West Sussex RH12 5AB, United Kingdom
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Cooper P, Potter S, Mueck B, Yousefi S, Jarai G. Identification of genes induced by inflammatory cytokines in airway epithelium. Am J Physiol Lung Cell Mol Physiol 2001; 280:L841-52. [PMID: 11290506 DOI: 10.1152/ajplung.2001.280.5.l841] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.7] [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: 11/22/2022] Open
Abstract
Epithelial cells lining the airways are thought to play a prominent role in respiratory diseases. We utilized cDNA representational difference analysis to identify the genes in which expression is induced by the proinflammatory cytokines tumor necrosis factor-alpha and interleukin-1beta in primary human bronchial epithelial cells and hence are relevant to airway inflammation. Hybridization of the subtraction product to arrayed cDNAs indicated that known tumor necrosis factor-alpha- and interleukin-1beta-inducible genes such as B94, Zfp36, and regulated on activation normal T cell expressed and secreted were represented, confirming the success of the subtraction experiment. A 1,152-clone library potentially representing genes with higher transcript levels in cytokine-treated human bronchial epithelial cells was generated and sequenced. Sequence similarity searches indicated that these clones represented 57 genes of known function, 1 gene of unknown function, 6 expressed sequence tags, and 2 novel sequences. The expression of 19 of these clones was studied by a combination of Northern blotting and RT-PCR analyses and confirmation of differential expression for 10 known genes, 2 expressed sequence tags, and a novel sequence not represented in any of the public databases was obtained. Thus cDNA representational difference analysis was utilized to isolate known and novel differentially expressed genes, which putatively play a role in airway inflammation.
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Affiliation(s)
- P Cooper
- Novartis Horsham Research Centre, Horsham RH12 5AB, United Kingdom
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Yousefi S, Cooper PR, Mueck B, Potter SL, Jarai G. cDNA representational difference analysis of human neutrophils stimulated by GM-CSF. Biochem Biophys Res Commun 2000; 277:401-9. [PMID: 11032736 DOI: 10.1006/bbrc.2000.3678] [Citation(s) in RCA: 42] [Impact Index Per Article: 1.8] [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: 11/22/2022]
Abstract
Neutrophils are the first cell type to migrate out of the vascular space and into the inflammatory site during an acute inflammation. However, in chronic inflammatory diseases, such as chronic obstructive pulmonary disease (COPD), a lack of clearance of neutrophils, imbalance between inflammatory mediators produced by neutrophils and their natural inhibitors make these cells a potential cause of tissue destruction in lung disease. Neutrophilic inflammation is generally characterised by high levels of local expression of activating cytokines (e.g., GM-CSF). Only a few studies have been published so far that have investigated the expression of genes preferentially expressed in activated neutrophils. The isolation of such genes, however, can lead to a better understanding of inflammatory disease and the identification of potential novel therapeutic targets or markers of the disease. We performed representational difference analysis of cDNA, a sensitive PCR-based subtractive enrichment procedure, and isolated 12 genes, 1 EST clone, and 3 sequences not represented in the public databases. Differential expression for 9 of these clones was confirmed by Northern hybridisation. Of the above nine transcripts three were chosen and shown to be up-regulated in neutrophils cocultured with stimulated primary human bronchial epithelial cells using a semiquantitative RT-PCR approach. Among the known genes identified were HM-74, CIS1, Cathepsin C, alpha-enolase, CD44, and the gene Translocation Three Four (TTF), most of them previously not known to be involved in GM-CSF induced neutrophil activation. Along with its tissue and cellular distribution we also derived the complete cDNA sequence and genomic structure of CIS1 using an in silico approach. In addition, we also report the initial characterisation of a novel gene, P1-89 that is primarily expressed in granulocytes and is up-regulated in activated cells. Our results identify several important genes associated with neutrophil activation and can lead to a better understanding of the molecular mechanisms of neutrophilic inflammations.
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Affiliation(s)
- S Yousefi
- Novartis Horsham Research Centre, Wimblehurst Road, Horsham, West Sussex, RH12 5AB, United Kingdom
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Cooper P, Mueck B, Yousefi S, Potter S, Jarai G. cDNA-RDA of genes expressed in fetal and adult lungs identifies factors important in development and function. Am J Physiol Lung Cell Mol Physiol 2000; 278:L284-93. [PMID: 10666112 DOI: 10.1152/ajplung.2000.278.2.l284] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.4] [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: 11/22/2022] Open
Abstract
The identification of genetic factors important in lung development and function will help in understanding the underlying molecular mechanisms of respiratory disease. Representational difference analysis of cDNA (cDNA-RDA) is a PCR-based subtractive enrichment procedure for the isolation of differentially expressed genes. We performed cDNA-RDA and isolated genes expressed more abundantly in fetal and adult lungs. Fifty-four clones potentially representing genes with higher transcript levels in the fetal lung were sequenced. Sequence similarity searches indicated that these clones included 12 known genes, a discoidin-like domain-containing gene, six expressed sequence tags (ESTs), and one novel sequence. Fifty-six clones potentially representing genes expressed more abundantly in the adult lung were also cloned and sequenced. Of these, 16 known human genes were represented along with two sequences significantly similar to known mouse genes and two novel sequences. Several of these known genes are implicated in stress response and lung protection. Thus cDNA-RDA was successfully used to isolate known and novel differentially expressed genes, which putatively play an important role in human lung development.
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Affiliation(s)
- P Cooper
- Novartis Horsham Research Centre, Molecular and Cell Biology Unit, Horsham, RH13 5AB, United Kingdom
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Enomoto H, Yousefi S, Vaziri N, Khonsari S, Ocariz J, Delavarian MG, Cesario T. The effect of calcium-related factors on the predominance of IFN-gamma or interleukin-4 in cultured mononuclear cells. J Interferon Cytokine Res 1998; 18:841-50. [PMID: 9809619 DOI: 10.1089/jir.1998.18.841] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [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: 11/12/2022] Open
Abstract
Certain factors have been studied that might influence whether interferon-gamma (IFN-gamma) or interleukin-4 (IL-4) will predominate in cultures of peripheral blood mononuclear cells (PBMC). ELISA was used to measure cytokine protein, and PCR was used to quantitate mRNA. It was found that induction with plant lectins produced greater yields of IFN-gamma than induction with ionophores, but ionophores alone produced at least equal yields of IL-4 as did lectins. Phorbol myristate acetate (PMA) greatly enhanced IFN yields in the presence of ionophores but had no significant influence on IL-4 production. Calcium-independent cytokine induction using anti-CD28 and PMA resulted in production of both cytokines, whereas depletion of extracellular calcium and magnesium adversely influenced the yield of both IL-4 and IFN-gamma. Finally, calmidazolium, an inhibitor of calmodulin, had an enhancing effect on IFN-gamma yields when phytohemagglutinin (PHA) was the inducer and an adverse effect when A23187 was the inducer. In contrast, calmidazolium reduced IL-4 yields with both PHA and A23187 induction.
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Affiliation(s)
- H Enomoto
- Department of Medicine, University of California Irvine Medical Center, Orange 92868, USA
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