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Geravandi S, Kalehoei E, Karami A, Nowrouzi F, Kalhori Z, Zhaleh H, Azadbakht M. Human Follicular Fluid and Mesenchymal Stem Cell Conditioned Medium Improves in Vitro Development of Vitrified-Warmed Mouse Oocytes. cryo letters 2023. [DOI: 10.54680/fr23210110512] [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] [Subscribe] [Scholar Register] [Indexed: 03/06/2023]
Abstract
BACKGROUND: In vitro maturation (IVM) and oocyte cryopreservation are therapeutic options in assisted reproductive technology which is used to preserve fertility in patients with different causes of infertility. OBJECTIVE: To analyze in vitro development of vitrified-warmed
oocytes in the presence of human follicular fluid (FF) and bone marrow mesenchymal stem cell-conditioned medium (BMSC- CM) as a rescue strategy in fertility preservation. MATERIALS AND METHODS: BMSC-CM and FF media were used as two natural media. Not only osteogenic and adipogenic differentiation
but also flow cytometry was carried out to confirm the nature of mesenchymal stem cells. A total of 327 vitrified-warmed oocytes were randomly assigned to three groups with different maturation media. After 24 h the maturation rate was evaluated. In vitro fertilization and also embryo development
were also assessed. RESULTS: Oocytes matured in the BMSC-CM and FF groups showed a significant increase compared to the control group (76.6±2.9, 53.2±1.0 , and 40.8±6.1, respectively) (P < 0.05). Embryo cleavage rates in the BMSC-CM were dramatically higher than
FF and control groups (85.6±2.2, 70.5±2.2, and 60.7±1.5, respectively). Blastocyst formation rates in the BMSC-CM group were statically different compared to FF and control groups (73.6±1.0, 58.5±1.0, and 45.8±4.2, respectively). CONCLUSION:
BMSC-CM and FF media not only improve the maturation rate of vitrified warmed oocytes but also significantly increase embryo cleavage and blastocyst rates.
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Affiliation(s)
- Shirin Geravandi
- Department of Biology, Faculty of Basic Sciences, Razi University, Kermanshah, Iran
| | - Eshrat Kalehoei
- Department of Biology, Faculty of Basic Sciences, Razi University, Kermanshah, Iran
| | - Azadeh Karami
- Department of Anatomical Sciences and Biology, Faculty of Medicine, University of Medical Sciences, Kermanshah, Iran
| | - Fatemeh Nowrouzi
- Department of Biology, Faculty of Basic Sciences, Razi University, Kermanshah, Iran
| | - Zahra Kalhori
- Department of Biology, Faculty of Basic Sciences, Razi University, Kermanshah, Iran
| | - Hossein Zhaleh
- Substance Abuse Prevention Research Center, University of Medical Sciences, Kermanshah, Iran
| | - Mehri Azadbakht
- Department of Biology, Faculty of Basic Sciences, Razi University, Kermanshah, Iran
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Geravandi S, Kalehoei E, Karami A, Nowrouzi F, Kalhori Z, Zhaleh H, Azadbakht M. Human follicular fluid and mesenchymal stem cell conditioned medium improves in vitro development of vitrified-warmed mouse oocytes. Cryo Letters 2023; 44:80-88. [PMID: 37883158] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 10/27/2023]
Abstract
BACKGROUND In vitro maturation (IVM) and oocyte cryopreservation are therapeutic options in assisted reproductive technology which is used to preserve fertility in patients with different causes of infertility. OBJECTIVE To analyze in vitro development of vitrified-warmed oocytes in the presence of human follicular fluid (FF) and bone marrow mesenchymal stem cell-conditioned medium (BMSC-CM) as a rescue strategy in fertility preservation. MATERIALS AND METHODS BMSC-CM and FF media were used as two natural media. Not only osteogenic and adipogenic differentiation but also flow cytometry was carried out to confirm the nature of mesenchymal stem cells. A total of 327 vitrified-warmed oocytes were randomly assigned to three groups with different maturation media. After 24 h the maturation rate was evaluated. In vitro fertilization and also embryo development were also assessed. RESULTS Oocytes matured in the BMSC-CM and FF groups showed a significant increase compared to the control group (76.6+/-2.9, 53.2±1.0 , and 40.8+/-6.1, respectively) (P % 0.05). Embryo cleavage rates in the BMSC-CM were dramatically higher than FF and control groups (85.6+/-2.2, 70.5+/-2.2, and 60.7+/-1.5, respectively). Blastocyst formation rates in the BMSC-CM group were statically different compared to FF and control groups (73.6+/-1.0, 58.5+/-1.0, and 45.8+/-4.2, respectively). CONCLUSION BMSC-CM and FF media not only improve the maturation rate of vitrified warmed oocytes but also significantly increase embryo cleavage and blastocyst rates. DOI: 10.54680/fr23210110512.
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Affiliation(s)
- S Geravandi
- Department of Biology, Faculty of Basic Sciences, Razi University, Kermanshah, Iran
| | - E Kalehoei
- Department of Biology, Faculty of Basic Sciences, Razi University, Kermanshah, Iran
| | - A Karami
- Department of Anatomical Sciences and Biology, Faculty of Medicine, University of Medical Sciences, Kermanshah, Iran
| | - F Nowrouzi
- Department of Biology, Faculty of Basic Sciences, Razi University, Kermanshah, Iran
| | - Z Kalhori
- Department of Biology, Faculty of Basic Sciences, Razi University, Kermanshah, Iran
| | - H Zhaleh
- Substance Abuse Prevention Research Center, University of Medical Sciences, Kermanshah, Iran
| | - M Azadbakht
- Department of Biology, Faculty of Basic Sciences, Razi University, Kermanshah, Iran.
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Sadighi M, Sabaghzadeh A, Biglari F, Ebrahimpour A, Karami A, Jafari Kafiabadi M. Clinical outcomes of Schatzker type II tibial plateau fractures using joint depression morphology: A cross-sectional study. Acta Orthop Belg 2023; 89:128-134. [PMID: 37294996 DOI: 10.52628/89.1.10846] [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: 06/11/2023]
Abstract
Tibial plateau fracture is a common intra-articular fracture caused by axial compression and Varus or Valgus force. This study aimed at the relationship between Luo classification morphology of tibial plateau fractures with clinical outcomes and surgical complications. The cross-sectional study was conducted on patients with Schatzker type II tibial plateau fracture who underwent surgery between May 2018 and January 2021. Clinical outcomes were measured by the AKSS, VAS, Lysholm score, alignment, and ROM. A total of 65 patients with a mean age of 36.38 years were enrolled. There was a significant difference in AKSS (p=0.001), VAS score (p=0.011), and mechanical axis alignment (p=0.037) between the groups by pre-operative joint depression depth below and above 10 millimeters. The higher pre-operative or post- operative size of joint depression depth in patients with Schatzker type II tibial plateau fractures was associated with poor outcomes, more pain, and malalignment. A higher surface area of joint depression was associated with a lower clinical outcome score and more pain.
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Eyjolfsdottir H, Koenig T, Karami A, Almqvist P, Lind G, Linderoth B, Wahlberg L, Seiger Å, Darreh-Shori T, Eriksdotter M, Jelic V. Fast Alpha Activity in EEG of Patients With Alzheimer’s Disease Is Paralleled by Changes in Cognition and Cholinergic Markers During Encapsulated Cell Biodelivery of Nerve Growth Factor. Front Aging Neurosci 2022; 14:756687. [PMID: 35557841 PMCID: PMC9085576 DOI: 10.3389/fnagi.2022.756687] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2021] [Accepted: 03/10/2022] [Indexed: 11/13/2022] Open
Abstract
Background Basal forebrain cholinergic neurons are dependent on nerve growth factor (NGF) for growth and survival and these cells are among the first to degenerate in Alzheimer’s disease (AD). Targeted delivery of NGF has been suggested as a potential therapy for AD. This hypothesis was tested in a clinical trial with encapsulated cell biodelivery of NGF (NGF-ECB) in AD patients. Three of six patients showed improved biomarkers for cognition by the end of the study. Here, we report on the effects of targeted delivery of NGF on human resting EEG. Materials and methods NGF-ECB implants were implanted bilaterally in the basal forebrain of six AD patients for 12 months. EEG recordings and quantitative analysis were performed at baseline, 3 and 12 months of NGF delivery, and analyzed for correlation with changes in Mini-mental state examination (MMSE) and levels of the cholinergic marker choline acetyltransferase (ChAT) in cerebrospinal fluid (CSF). Results We found significant correlations between the topographic variance of EEG spectral power at the three study points (baseline, 3 and 12 months) and changes in MMSE and CSF ChAT. This possible effect of NGF was identified in a narrow window of alpha frequency 10–11.5 Hz, where a stabilization in MMSE score during treatment was related to an increase in EEG alpha power. A similar relation was observed between the alpha power and ChAT. More theta power at 6.5 Hz was on the contrary associated with a decrease in CSF ChAT during the trial period. Conclusion In this exploratory study, there was a positive correlative pattern between physiological high-frequency alpha activity and stabilization in MMSE and increase in CSF ChAT in AD patients receiving targeted delivery of NGF to the cholinergic basal forebrain.
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Affiliation(s)
- Helga Eyjolfsdottir
- Department of Neurobiology, Care Science and Society, Karolinska Institutet, Solna, Sweden
- Theme Inflammation and Aging, Karolinska University, Stockholm, Sweden
| | - Thomas Koenig
- Translational Research Center, University Hospital of Psychiatry, University of Bern, Bern, Switzerland
| | - Azadeh Karami
- Department of Neurobiology, Care Science and Society, Karolinska Institutet, Solna, Sweden
| | - Per Almqvist
- Department of Clinical Neuroscience, Stockholm, Sweden
- Department of Neurosurgery, Theme Neuro, Karolinska University, Stockholm, Sweden
| | - Göran Lind
- Department of Clinical Neuroscience, Stockholm, Sweden
- Department of Neurosurgery, Theme Neuro, Karolinska University, Stockholm, Sweden
| | - Bengt Linderoth
- Department of Clinical Neuroscience, Stockholm, Sweden
- Department of Neurosurgery, Theme Neuro, Karolinska University, Stockholm, Sweden
| | | | - Åke Seiger
- Stiftelsen Stockholms Sjukhem, Stockholm, Sweden
| | - Taher Darreh-Shori
- Department of Neurobiology, Care Science and Society, Karolinska Institutet, Solna, Sweden
| | - Maria Eriksdotter
- Department of Neurobiology, Care Science and Society, Karolinska Institutet, Solna, Sweden
- Theme Inflammation and Aging, Karolinska University, Stockholm, Sweden
| | - Vesna Jelic
- Department of Neurobiology, Care Science and Society, Karolinska Institutet, Solna, Sweden
- Theme Inflammation and Aging, Karolinska University, Stockholm, Sweden
- *Correspondence: Vesna Jelic,
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Geravandi S, Karami A, Azadbakht M, Kalehoei E, Nowrouzi F, Bakhatiari M. Follicular fluid supplemented with copper and zinc increase the maturation rate of mouse vitrified-warmed oocytes. Cryo Letters 2021; 42:326-331. [PMID: 35366298] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
BACKGROUND Immature oocyte cryopreservation is a therapeutic option in assisted reproductive technology. OBJECTIVE To evaluate the effects of supplementing oocyte maturation medium with human follicular fluid (hFF), zinc and copper. MATERIALS AND METHODS Four different maturation media supplemented with 10% follicular fluid, 4 μg/mL copper and 1 μg/mL zinc were used for vitrified-warmed oocytes of mouse. RESULTS Maturation rate was the highest (63.3%) in the presence of zinc. Cleavage and blastocyst rates in groups with copper and zinc were significantly higher than the control group (39.9% and 46.4% vs. 28.8%), without any significant difference between Zn and Cu. CONCLUSION Our findings indicate the high importance of using hFF as a natural medium, and also zinc and copper as two efficient trace elements in the maturation medium for vitrified-warmed oocytes.
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Affiliation(s)
- S Geravandi
- Department of Biology, Faculty of Basic Sciences, Razi University, Taq-e Bostan, Bagh-e Abrisham, 6714967346, Kermanshah, Iran
| | - A Karami
- Department of Anatomical Sciences and Biology, Faculty of Medicine, Kermanshah University of Medical Sciences, Shahid Beheshti Boulevard, 6715847141, Kermanshah, Iran
| | - M Azadbakht
- Department of Biology, Faculty of Basic Sciences, Razi University, Taq-e Bostan, Bagh-e Abrisham, 6714967346, Kermanshah, Iran.
| | - E Kalehoei
- Department of Biology, Faculty of Basic Sciences, Razi University, Taq-e Bostan, Bagh-e Abrisham, 6714967346, Kermanshah, Iran
| | - F Nowrouzi
- Department of Biology, Faculty of Basic Sciences, Razi University, Taq-e Bostan, Bagh-e Abrisham, 6714967346, Kermanshah, Iran
| | - M Bakhatiari
- Department of Anatomical Sciences and Biology, Faculty of Medicine, Kermanshah University of Medical Sciences, Shahid Beheshti Boulevard, 6715847141, Kermanshah, Iran
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Karami A, Darreh-Shori T, Schultzberg M, Eriksdotter M. CSF and Plasma Cholinergic Markers in Patients With Cognitive Impairment. Front Aging Neurosci 2021; 13:704583. [PMID: 34512307 PMCID: PMC8426513 DOI: 10.3389/fnagi.2021.704583] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2021] [Accepted: 07/21/2021] [Indexed: 11/13/2022] Open
Abstract
Introduction Alzheimer’s disease (AD) is the most prevalent form of dementia with symptoms of deteriorating cognitive functions and memory loss, partially as a result of a decrease in cholinergic neurotransmission. The disease is incurable and treatment with cholinesterase inhibitors (ChEIs) is symptomatic. Choline acetyltransferase (ChAT), the enzyme that synthesizes acetylcholine (ACh), has been proven recently to be present in both cerebrospinal fluid (CSF) and plasma. As ChAT plays a role in regulating the extracellular ACh levels, it may have an impact on prognosis and cognitive performance in AD patients. Objectives To measure ChAT activity and its protein concentration in CSF and plasma from patients with AD, mild cognitive impairment (MCI), or Subjective cognitive impairment (SCI). Methods Plasma and CSF samples were obtained from 21 AD, 32 MCI, and 30 SCI patients. The activity and protein levels of ChAT and acetylcholinesterase (AChE), the enzyme catalyzing the hydrolysis of ACh, were analyzed using an integrated activity and protein concentration ELISA-like assay. A Cholinergic Index was calculated as the ratio of ChAT to AChE activities in CSF. The data were analyzed in relation to dementia biomarkers and cognitive performance of the patients. Results The CSF ChAT activity was significantly higher (55–67%) in MCI patients compared to AD and SCI cases. The CSF Cholinergic Index was 41 and 22% lower in AD patients than in MCI and SCI subjects, respectively. This index correlated positively with the Aβ42/p-tau ratio in CSF in SCI but negatively with that in AD and MCI. The ChAT activity and protein levels in plasma exhibited significant differences with the pattern of AD>>MCI>SCI. Conclusion This is the first study investigating soluble levels of the key cholinergic enzyme, ChAT, in both plasma and CSF of individuals at different clinical stages of dementia. Although further validation is needed, the overall pattern of the results suggests that in the continuum of AD, the cholinergic signaling exhibits an inverse U-shape dynamic of changes in the brain that greatly differs from the changes observed in the plasma compartment.
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Affiliation(s)
- Azadeh Karami
- Division of Clinical Geriatrics, Department of Neurobiology, Care Sciences and Society, Center for Alzheimer Research, Karolinska Institutet, Campus Flemingsberg, Stockholm, Sweden
| | - Taher Darreh-Shori
- Division of Clinical Geriatrics, Department of Neurobiology, Care Sciences and Society, Center for Alzheimer Research, Karolinska Institutet, Campus Flemingsberg, Stockholm, Sweden
| | - Marianne Schultzberg
- Division of Neurogeriatrics, Department of Neurobiology, Care Sciences and Society, Center for Alzheimer Research, Karolinska Institutet, Campus Solna, Stockholm, Sweden
| | - Maria Eriksdotter
- Division of Clinical Geriatrics, Department of Neurobiology, Care Sciences and Society, Center for Alzheimer Research, Karolinska Institutet, Campus Flemingsberg, Stockholm, Sweden.,Theme Inflammation and Aging, Karolinska University Hospital, Stockholm, Sweden
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Karami A, Eriksdotter M, Kadir A, Almkvist O, Nordberg A, Darreh-Shori T. CSF Cholinergic Index, a New Biomeasure of Treatment Effect in Patients With Alzheimer's Disease. Front Mol Neurosci 2019; 12:239. [PMID: 31680850 PMCID: PMC6798072 DOI: 10.3389/fnmol.2019.00239] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2019] [Accepted: 09/19/2019] [Indexed: 02/04/2023] Open
Abstract
Alzheimer’s disease (AD) is a progressive disease with early degeneration of the central cholinergic neurons. Currently, three of four AD drugs act by inhibiting the acetylcholine (ACh) degrading enzyme, acetylcholinesterase (AChE). Efficacy of these drugs depends on available amount of ACh, which is biosynthesized by choline acetyltransferase (ChAT). We investigated whether treatment with a cholinesterase-inhibitor, galantamine, alters the relative levels of AChE to ChAT in cerebrospinal fluid (CSF) and whether levels of these CSF biomarkers correlate with in vivo AChE activity and nicotinic binding sites in the brain assessed by positron emission tomography (PET). Protein concentrations and activities of ChAT and AChE were measured in CSF of 18 patients with mild AD prior to and after 3 months of treatment with galantamine (n = 12) or placebo (n = 6), followed by nine additional months of galantamine treatment in all patients. A Cholinergic index was defined as the ratio of ChAT to AChE in CSF and was evaluated in relation to the in vivo AChE activity, the nicotinic binding sites and different measures of cognition. Besides an expected inhibition of AChE activity, galantamine treatment was accompanied by a mild increase in CSF ChAT activity. Thereby, the Cholinergic index was significantly increased in the Galantamine group (60% ± 14) after 3 months compared to baseline (p < 0.0023) or (p < 0.0004). This index remained high in the Galantamine group compared to baseline (54% ± 11) at 12 months follow-up, while it showed an increase in the Placebo group when they switched to active galantamine treatment (44% ± 14 vs. baseline, 61% ± 14 vs. 3 months, all p-values < 0.05). Furthermore, the in vivo brain AChE activity (assessed by PET) correlated with the CSF Cholinergic index at 12 months (r = 0.98, p < 0.001). The CSF Cholinergic index also correlated with ADAS-Cog and some other neuropsychological tests at 12 months. This is the first study assessing a CSF Cholinergic index in relation to treatment with a cholinesterase inhibitor. The treatment-specific increase in CSF ChAT activity suggests that cholinesterase-inhibitors may also increase the ACh-biosynthesis capacity in the patients. Additional studies are warranted to evaluate the utility of the CSF Cholinergic index as a biomeasure of therapeutic effect in AD.
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Affiliation(s)
- Azadeh Karami
- Center for Alzheimer Research, Department of Neurobiology, Care Sciences and Society, Division of Clinical Geriatrics, Karolinska Institutet, Solna, Sweden
| | - Maria Eriksdotter
- Center for Alzheimer Research, Department of Neurobiology, Care Sciences and Society, Division of Clinical Geriatrics, Karolinska Institutet, Solna, Sweden.,Karolinska University Hospital Huddinge, Theme Aging, Stockholm, Sweden
| | - Ahmadul Kadir
- Center for Alzheimer Research, Department of Neurobiology, Care Sciences and Society, Division of Clinical Geriatrics, Karolinska Institutet, Solna, Sweden.,Karolinska University Hospital Huddinge, Theme Aging, Stockholm, Sweden
| | - Ove Almkvist
- Center for Alzheimer Research, Department of Neurobiology, Care Sciences and Society, Division of Clinical Geriatrics, Karolinska Institutet, Solna, Sweden
| | - Agneta Nordberg
- Center for Alzheimer Research, Department of Neurobiology, Care Sciences and Society, Division of Clinical Geriatrics, Karolinska Institutet, Solna, Sweden.,Karolinska University Hospital Huddinge, Theme Aging, Stockholm, Sweden
| | - Taher Darreh-Shori
- Center for Alzheimer Research, Department of Neurobiology, Care Sciences and Society, Division of Clinical Geriatrics, Karolinska Institutet, Solna, Sweden
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Broad J, Kung VWS, Palmer A, Elahi S, Karami A, Darreh-Shori T, Ahmed S, Thaha MA, Carroll R, Chin-Aleong J, Martin JE, Saffrey MJ, Knowles CH, Sanger GJ. Changes in neuromuscular structure and functions of human colon during ageing are region-dependent. Gut 2019; 68:1210-1223. [PMID: 30228216 PMCID: PMC6594449 DOI: 10.1136/gutjnl-2018-316279] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/16/2018] [Revised: 08/17/2018] [Accepted: 08/20/2018] [Indexed: 12/20/2022]
Abstract
OBJECTIVE To determine if human colonic neuromuscular functions decline with increasing age. DESIGN Looking for non-specific changes in neuromuscular function, a standard burst of electrical field stimulation (EFS) was used to evoke neuronally mediated (cholinergic/nitrergic) contractions/relaxations in ex vivomuscle strips of human ascending and descending colon, aged 35-91 years (macroscopically normal tissue; 239 patients undergoing cancer resection). Then, to understand mechanisms of change, numbers and phenotype of myenteric neurons (30 306 neurons stained with different markers), densities of intramuscular nerve fibres (51 patients in total) and pathways involved in functional changes were systematically investigated (by immunohistochemistry and use of pharmacological tools) in elderly (≥70 years) and adult (35-60 years) groups. RESULTS With increasing age, EFS was more likely to evoke muscle relaxation in ascending colon instead of contraction (linear regression: n=109, slope 0.49%±0.21%/year, 95% CI), generally uninfluenced by comorbidity or use of medications. Similar changes were absent in descending colon. In the elderly, overall numbers of myenteric and neuronal nitric oxide synthase-immunoreactive neurons and intramuscular nerve densities were unchanged in ascending and descending colon, compared with adults. In elderly ascending, not descending, colon numbers of cell bodies exhibiting choline acetyltransferase immunoreactivity increased compared with adults (5.0±0.6 vs 2.4±0.3 neurons/mm myenteric plexus, p=0.04). Cholinergically mediated contractions were smaller in elderly ascending colon compared with adults (2.1±0.4 and 4.1±1.1 g-tension/g-tissue during EFS; n=25/14; p=0.04); there were no changes in nitrergic function or in ability of the muscle to contract/relax. Similar changes were absent in descending colon. CONCLUSION In ascending not descending colon, ageing impairs cholinergic function.
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Affiliation(s)
- John Broad
- Blizard Institute, Barts and The London School of Medicine and Dentistry, Queen Mary University of London, London, UK
| | - Victor W S Kung
- Blizard Institute, Barts and The London School of Medicine and Dentistry, Queen Mary University of London, London, UK
| | - Alexandra Palmer
- Blizard Institute, Barts and The London School of Medicine and Dentistry, Queen Mary University of London, London, UK
| | - Shezan Elahi
- Blizard Institute, Barts and The London School of Medicine and Dentistry, Queen Mary University of London, London, UK
| | - Azadeh Karami
- Department of Neurobiology, Care Sciences and Society, Karolinska Institutet, NEO, Stockholm, Sweden
| | - Taher Darreh-Shori
- Department of Neurobiology, Care Sciences and Society, Karolinska Institutet, NEO, Stockholm, Sweden
| | - Shafi Ahmed
- Department of Surgery, Barts Health NHS Trust, The Royal London Hospital, London, UK,Department of Pathology, Barts Health NHS Trust, The Royal London Hospital, London, UK
| | - Mohamed Adhnan Thaha
- Blizard Institute, Barts and The London School of Medicine and Dentistry, Queen Mary University of London, London, UK,Department of Surgery, Barts Health NHS Trust, The Royal London Hospital, London, UK,Department of Pathology, Barts Health NHS Trust, The Royal London Hospital, London, UK
| | - Rebecca Carroll
- Blizard Institute, Barts and The London School of Medicine and Dentistry, Queen Mary University of London, London, UK
| | - Joanne Chin-Aleong
- Blizard Institute, Barts and The London School of Medicine and Dentistry, Queen Mary University of London, London, UK
| | - Joanne E Martin
- Blizard Institute, Barts and The London School of Medicine and Dentistry, Queen Mary University of London, London, UK
| | - M Jill Saffrey
- School of Life, Health and Chemical Sciences, Open University, Milton Keynes, UK
| | - Charles H Knowles
- Blizard Institute, Barts and The London School of Medicine and Dentistry, Queen Mary University of London, London, UK,Department of Surgery, Barts Health NHS Trust, The Royal London Hospital, London, UK,Department of Pathology, Barts Health NHS Trust, The Royal London Hospital, London, UK
| | - Gareth John Sanger
- Blizard Institute, Barts and The London School of Medicine and Dentistry, Queen Mary University of London, London, UK
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Tebyanian H, Karami A, Motavallian E, Samadikuchaksaraei A, Arjmand B, Nourani MR. Rat lung decellularization using chemical detergents for lung tissue engineering. Biotech Histochem 2018; 94:214-222. [PMID: 30516069 DOI: 10.1080/10520295.2018.1544376] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022] Open
Abstract
Although pulmonary diseases account for a large number of deaths in the world, most have no treatment other than transplantation. New therapeutic methods for lung treatment include lung tissue engineering and regenerative medicine. Lung decellularization has been used to produce an appropriate scaffold for recellularization and implantation. We investigated 3-[(3-cholamidopropyl) dimethylammonio]-1-propanesulfonate (CHAPS) with sodium dodecyl sulfate (SDS) and Triton X-100 detergents for effecting rat lung decellularization. We evaluated using conventional histology, immunofluorescence staining and SEM methods for removing nuclear material while leaving intact extracellular matrix proteins and three-dimensional architecture. We investigated different concentrations of CHAPS, SDS and Triton X-100 for different periods. We found that 2 mM CHAPS + 0/1% SDS for 48 h was the best among the treatments investigated. Our method can be used to produce an appropriate scaffold for recellularization by stem cells and for investigations ex vivo and in vivo.
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Affiliation(s)
- H Tebyanian
- a Department of Tissue Engineering and Regenerative Medicine, Nanobiotechnology Research Center , Baqiyatallah University of Medical Sciences , Tehran , Iran.,b Research Center for Prevention of Oral and Dental Diseases , Baqiyatallah University of Medical Sciences , Tehran , Iran
| | - A Karami
- a Department of Tissue Engineering and Regenerative Medicine, Nanobiotechnology Research Center , Baqiyatallah University of Medical Sciences , Tehran , Iran.,b Research Center for Prevention of Oral and Dental Diseases , Baqiyatallah University of Medical Sciences , Tehran , Iran
| | - E Motavallian
- c Department of General Surgery, Faculty of Medicine , Baqiyatallah University of Medical Sciences , Tehran , Iran
| | - A Samadikuchaksaraei
- d Cellular and Molecular Research Center , Iran University of Medical Sciences , Tehran , Iran.,e Department of Tissue Engineering & Regenerative Medicine, Faculty of Advanced Technologies in Medicine , Iran University of Medical Sciences , Tehran , Iran
| | - B Arjmand
- f Cell Therapy and Regenerative Medicine Research Center, Endocrinology and Metabolism Cellular-Molecular Sciences Institute , Tehran University of Medical Sciences , Tehran , Iran
| | - M R Nourani
- a Department of Tissue Engineering and Regenerative Medicine, Nanobiotechnology Research Center , Baqiyatallah University of Medical Sciences , Tehran , Iran
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Karami A, Darreh-Shori T, Zetterberg H, Blennow K, Eriksdotter M. P1‐001: CSF CHOLINE ACETYLTRANSFERASE SHOWS DIFFERENTIAL LEVELS AMONG HEALTHY CONTROLS AND PATIENTS WITH AD AND MCI. Alzheimers Dement 2018. [DOI: 10.1016/j.jalz.2018.06.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Affiliation(s)
- Azadeh Karami
- Center for Alzheimer Research, Division of Clinical Geriatrics, Department of Neurobiology, Care Sciences and SocietyKarolinska InstitutetStockholmSweden
| | - Taher Darreh-Shori
- Center for Alzheimer Research, Division of Clinical Geriatrics, Department of Neurobiology, Care Sciences and SocietyKarolinska InstitutetStockholmSweden
| | - Henrik Zetterberg
- Clinical Neurochemistry LaboratorySahlgrenska University HospitalMölndalSweden
- UK Dementia Research Institute at UCLLondonUnited Kingdom
- Department of Psychiatry and Neurochemistry, Institute of Neuroscience and PhysiologyThe Sahlgrenska Academy at the University of GothenburgMölndalSweden
- Department of Molecular NeuroscienceUCL Institute of NeurologyQueen SquareLondonUnited Kingdom
- Institute of Neuroscience and PhysiologySahlgrenska Academy at the University of Gothenburg, Gothenburg, SwedenGothenburgSweden
| | - Kaj Blennow
- Institute of Neuroscience and PhysiologyThe Sahlgrenska Academy at University of GothenburgMölndalSweden
- Clinical Neurochemistry LaboratorySahlgrenska University HospitalMolndalSweden
| | - Maria Eriksdotter
- Center for Alzheimer Research, Division of Clinical Geriatrics, Department of Neurobiology, Care Sciences and SocietyKarolinska InstitutetStockholmSweden
- Theme Aging, Karolinska University HospitalStockholmSweden
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11
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Roshani GH, Karami A, Khazaei A, Olfateh A, Nazemi E, Omidi M. Optimization of radioactive sources to achieve the highest precision in three-phase flow meters using Jaya algorithm. Appl Radiat Isot 2018; 139:256-265. [PMID: 29879530 DOI: 10.1016/j.apradiso.2018.05.015] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2018] [Revised: 05/14/2018] [Accepted: 05/16/2018] [Indexed: 10/16/2022]
Abstract
Gamma ray source has very important role in precision of multi-phase flow metering. In this study, different combination of gamma ray sources ((133Ba-137Cs), (133Ba-60Co), (241Am-137Cs), (241Am-60Co), (133Ba-241Am) and (60Co-137Cs)) were investigated in order to optimize the three-phase flow meter. Three phases were water, oil and gas and the regime was considered annular. The required data was numerically generated using MCNP-X code which is a Monte-Carlo code. Indeed, the present study devotes to forecast the volume fractions in the annular three-phase flow, based on a multi energy metering system including various radiation sources and also one NaI detector, using a hybrid model of artificial neural network and Jaya Optimization algorithm. Since the summation of volume fractions is constant, a constraint modeling problem exists, meaning that the hybrid model must forecast only two volume fractions. Six hybrid models associated with the number of used radiation sources are designed. The models are employed to forecast the gas and water volume fractions. The next step is to train the hybrid models based on numerically obtained data. The results show that, the best forecast results are obtained for the gas and water volume fractions of the system including the (241Am-137Cs) as the radiation source.
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Affiliation(s)
- G H Roshani
- Electrical Engineering Department, Kermanshah University of Technology, Kermanshah, Iran
| | - A Karami
- Mechanical Engineering Department, Razi University, Kermanshah, Iran
| | - A Khazaei
- Young Researchers and Elite Club, Kermanshah Branch, Islamic Azad University, Kermanshah, Iran
| | - A Olfateh
- Nuclear Science and Technology Research Institute, Tehran, Iran
| | - E Nazemi
- Young Researchers and Elite Club, Kermanshah Branch, Islamic Azad University, Kermanshah, Iran.
| | - M Omidi
- Electrical Engineering Department, Kermanshah University of Technology, Kermanshah, Iran
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12
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Nejad Ebrahimi S, Asadi H, Esmaeili H, Karami A, Hadian J, Hamburger M, Chaanin A. Sesquiterpenes from Petasites hybridus rhizomes and determination absolute configuration by circular dichroism. Am J Transl Res 2017. [DOI: 10.1055/s-0037-1608043] [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: 10/18/2022]
Affiliation(s)
- S Nejad Ebrahimi
- Department of Phytochemistry, Medicinal Plants and Drugs Research Institute, Shahid Beheshti University, Tehran, Iran
| | - H Asadi
- Department of Phytochemistry, Medicinal Plants and Drugs Research Institute, Shahid Beheshti University, Tehran, Iran
| | - H Esmaeili
- Department of Horticulture, Faculty of Agriculture, Shiraz University, Shiraz, Iran
| | - A Karami
- Department of Horticulture, Faculty of Agriculture, Shiraz University, Shiraz, Iran
| | - J Hadian
- Department of Agriculture, Medicinal Plants and Drugs Research Institute, Shahid Beheshti University, Tehran, Iran
| | - M Hamburger
- Pharmaceutical Biology, Department of Pharmaceutical Sciences, University of Basel, Uttwil, Switzerland
| | - A Chaanin
- VitaPlant AG, Romanshornerstar. 39, CH-8592, Uttwil, Switzerland
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13
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Roshani GH, Karami A, Salehizadeh A, Nazemi E. The capability of radial basis function to forecast the volume fractions of the annular three-phase flow of gas-oil-water. Appl Radiat Isot 2017; 129:156-162. [PMID: 28865335 DOI: 10.1016/j.apradiso.2017.08.027] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2017] [Revised: 08/22/2017] [Accepted: 08/22/2017] [Indexed: 11/29/2022]
Abstract
The problem of how to precisely measure the volume fractions of oil-gas-water mixtures in a pipeline remains as one of the main challenges in the petroleum industry. This paper reports the capability of Radial Basis Function (RBF) in forecasting the volume fractions in a gas-oil-water multiphase system. Indeed, in the present research, the volume fractions in the annular three-phase flow are measured based on a dual energy metering system including the 152Eu and 137Cs and one NaI detector, and then modeled by a RBF model. Since the summation of volume fractions are constant (equal to 100%), therefore it is enough for the RBF model to forecast only two volume fractions. In this investigation, three RBF models are employed. The first model is used to forecast the oil and water volume fractions. The next one is utilized to forecast the water and gas volume fractions, and the last one to forecast the gas and oil volume fractions. In the next stage, the numerical data obtained from MCNP-X code must be introduced to the RBF models. Then, the average errors of these three models are calculated and compared. The model which has the least error is picked up as the best predictive model. Based on the results, the best RBF model, forecasts the oil and water volume fractions with the mean relative error of less than 0.5%, which indicates that the RBF model introduced in this study ensures an effective enough mechanism to forecast the results.
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Affiliation(s)
- G H Roshani
- Electrial Engineering Department, Kermanshah University of Technology, Kermanshah, Iran
| | - A Karami
- Young Researchers and Elite Club, Kermanshah Branch, Islamic Azad University, Kermanshah, Iran
| | - A Salehizadeh
- Young Researchers and Elite Club, Kermanshah Branch, Islamic Azad University, Kermanshah, Iran
| | - E Nazemi
- Young Researchers and Elite Club, Kermanshah Branch, Islamic Azad University, Kermanshah, Iran
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14
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Tebyanian H, Karami A, Motavallian E, Aslani J, Samadikuchaksaraei A, Arjmand B, Nourani MR. Histologic analyses of different concentrations of TritonX-100 and Sodium dodecyl sulfate detergent in lung decellularization. ACTA ACUST UNITED AC 2017; 63:46-51. [PMID: 28838339 DOI: 10.14715/cmb/2017.63.7.8] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2017] [Revised: 05/18/2017] [Accepted: 05/19/2017] [Indexed: 11/18/2022]
Abstract
Pulmonary diseases cusecs a large portion of mortality in the world. There is no more cure for pulmonary diseases and many approaches are needed for finding ways to cure. Nowadays, implantation and drugs are only ways for curing those people who are facing with these diseases. Tissue engineering and regenerative medicine have been appeared as multidisciplinary field and also, they presents new therapeutic approaches for pulmonary diseases. One of these therapeutic approaches is decellularization which removes cellular but leaves intact important extracellular matrix (ECM) proteins and three-dimensional (3D) architecture and also, this approach has been studied for in-vitro and ex-vivo. In this study, we aimed to investigate a comparison of different concentrations of Triton X-100 and Sodium dodecyl sulfate detergents in lung decellularization in order to evaluate the effects of different concentrations and times of mentioned detergents on three dimensional and ECM proteins lung. Two detergents (Triton-X100 and Sodium dodecyl sulfat) were used with different concentrations for decellularizing rat lungs for maintaining of three-dimensional lung architecture and ECM protein compositions which have significant roles in differentiation and migration of stem cells. Results showed that SDS 0.05%, 0.1% and Triton-X100 0.1% could maintain 3D, elastin and collagen better than other concentrations in 24 and 48 h- decellularization. We concluded that these approaches can help to achieve three-dimensional architecture and extracellular matrix of lung with minimum destruction for next step such as recellularization and in-vivo study.
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Affiliation(s)
- H Tebyanian
- Applied Biotechnology Research Center, Baqiyatallah University of Medical Sciences, Tehran, Iran
| | - A Karami
- Applied Biotechnology Research Center, Baqiyatallah University of Medical Sciences, Tehran, Iran
| | - E Motavallian
- Department of General Surgery, Faculty of Medicine, Baqiyatallah University of Medical Sciences, Tehran, Iran
| | - J Aslani
- Chemical Injuries Research Center, Baqiyatallah University of Medical Sciences; Tehran, Iran
| | - A Samadikuchaksaraei
- Cellular and Molecular Research Center, Iran University of Medical Sciences, Tehran, Iran; Department of Tissue Engineering & Regenerative Medicine, Faculty of Advanced Technologies in Medicine, Iran University of Medical Sciences, Tehran, Iran
| | - B Arjmand
- Cell Therapy and Regenerative Medicine Research Center, Endicrinology and Metabolism Cellular-Molecular Sciences Institute, Tehran Univertsity of Medical Sciences, Tehran, Iran
| | - M R Nourani
- Chemical Injuries Research Center, Baqiyatallah University of Medical Sciences; Tehran, Iran
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15
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Karami A, Badiee D. Designing a curriculum about electron microscope based on disciplinary method for graduate students. J Fundam and Appl Sci 2016. [DOI: 10.4314/jfas.v8i3s.231] [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: 11/17/2022] Open
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16
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Eyjolfsdottir H, Eriksdotter M, Linderoth B, Lind G, Juliusson B, Kusk P, Almkvist O, Andreasen N, Blennow K, Ferreira D, Westman E, Nennesmo I, Karami A, Darreh-Shori T, Kadir A, Nordberg A, Sundström E, Wahlund LO, Wall A, Wiberg M, Winblad B, Seiger Å, Wahlberg L, Almqvist P. Targeted delivery of nerve growth factor to the cholinergic basal forebrain of Alzheimer's disease patients: application of a second-generation encapsulated cell biodelivery device. Alzheimers Res Ther 2016; 8:30. [PMID: 27389402 PMCID: PMC4936020 DOI: 10.1186/s13195-016-0195-9] [Citation(s) in RCA: 95] [Impact Index Per Article: 11.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/07/2016] [Accepted: 06/06/2016] [Indexed: 12/21/2022]
Abstract
Background Targeted delivery of nerve growth factor (NGF) has emerged as a potential therapy for Alzheimer’s disease (AD) due to its regenerative effects on basal forebrain cholinergic neurons. This hypothesis has been tested in patients with AD using encapsulated cell biodelivery of NGF (NGF-ECB) in a first-in-human study. We report our results from a third-dose cohort of patients receiving second-generation NGF-ECB implants with improved NGF secretion. Methods Four patients with mild to moderate AD were recruited to participate in an open-label, phase Ib dose escalation study with a 6-month duration. Each patient underwent stereotactic implant surgery with four NGF-ECB implants targeted at the cholinergic basal forebrain. The NGF secretion of the second-generation implants was improved by using the Sleeping Beauty transposon gene expression technology and an improved three-dimensional internal scaffolding, resulting in production of about 10 ng NGF/device/day. Results All patients underwent successful implant procedures without complications, and all patients completed the study, including implant removal after 6 months. Upon removal, 13 of 16 implants released NGF, 8 implants released NGF at the same rate or higher than before the implant procedure, and 3 implants failed to release detectable amounts of NGF. Of 16 adverse events, none was NGF-, or implant-related. Changes from baseline values of cholinergic markers in cerebrospinal fluid (CSF) correlated with cortical nicotinic receptor expression and Mini Mental State Examination score. Levels of neurofilament light chain (NFL) protein increased in CSF after NGF-ECB implant, while glial fibrillary acidic protein (GFAP) remained stable. Conclusions The data derived from this patient cohort demonstrate the safety and tolerability of sustained NGF release by a second-generation NGF-ECB implant to the basal forebrain, with uneventful surgical implant and removal of NGF-ECB implants in a new dosing cohort of four patients with AD. Trial registration ClinicalTrials.gov identifier: NCT01163825. Registered on 14 Jul 2010.
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Affiliation(s)
- Helga Eyjolfsdottir
- Department of Neurobiology, Care Sciences and Society, Karolinska Institutet, 171 77, Stockholm, Sweden.,Department of Geriatrics, Karolinska University Hospital, Huddinge, 171 76, Stockholm, Sweden
| | - Maria Eriksdotter
- Department of Neurobiology, Care Sciences and Society, Karolinska Institutet, 171 77, Stockholm, Sweden.,Department of Geriatrics, Karolinska University Hospital, Huddinge, 171 76, Stockholm, Sweden
| | - Bengt Linderoth
- Department of Clinical Neuroscience, Karolinska Institutet, 171 77, Stockholm, Sweden.,Department of Neurosurgery, Karolinska University Hospital Solna, Building R3:02, 171 76, Stockholm, Sweden
| | - Göran Lind
- Department of Clinical Neuroscience, Karolinska Institutet, 171 77, Stockholm, Sweden.,Department of Neurosurgery, Karolinska University Hospital Solna, Building R3:02, 171 76, Stockholm, Sweden
| | - Bengt Juliusson
- NsGene Inc., 225 Chapman Street, Providence, RI, 02905-4533, USA
| | - Philip Kusk
- NsGene Inc., 225 Chapman Street, Providence, RI, 02905-4533, USA
| | - Ove Almkvist
- Department of Neurobiology, Care Sciences and Society, Karolinska Institutet, 171 77, Stockholm, Sweden
| | - Niels Andreasen
- Department of Neurobiology, Care Sciences and Society, Karolinska Institutet, 171 77, Stockholm, Sweden.,Department of Geriatrics, Karolinska University Hospital, Huddinge, 171 76, Stockholm, Sweden
| | - Kaj Blennow
- Clinical Neurochemistry Laboratory, Department of Clinical Neuroscience, University of Gothenburg, 41345, Gothenburg, Sweden
| | - Daniel Ferreira
- Department of Neurobiology, Care Sciences and Society, Karolinska Institutet, 171 77, Stockholm, Sweden
| | - Eric Westman
- Department of Neurobiology, Care Sciences and Society, Karolinska Institutet, 171 77, Stockholm, Sweden
| | - Inger Nennesmo
- Department of Laboratory Medicine, Section of Pathology, Karolinska University Hospital, 171 76, Stockholm, Sweden
| | - Azadeh Karami
- Department of Neurobiology, Care Sciences and Society, Karolinska Institutet, 171 77, Stockholm, Sweden
| | - Taher Darreh-Shori
- Department of Neurobiology, Care Sciences and Society, Karolinska Institutet, 171 77, Stockholm, Sweden
| | - Ahmadul Kadir
- Department of Neurobiology, Care Sciences and Society, Karolinska Institutet, 171 77, Stockholm, Sweden
| | - Agneta Nordberg
- Department of Neurobiology, Care Sciences and Society, Karolinska Institutet, 171 77, Stockholm, Sweden.,Department of Geriatrics, Karolinska University Hospital, Huddinge, 171 76, Stockholm, Sweden
| | - Erik Sundström
- Department of Neurobiology, Care Sciences and Society, Karolinska Institutet, 171 77, Stockholm, Sweden.,Stiftelsen Stockholms Sjukhem, Mariebergsgatan 22, 112 35, Stockholm, Sweden
| | - Lars-Olof Wahlund
- Department of Neurobiology, Care Sciences and Society, Karolinska Institutet, 171 77, Stockholm, Sweden.,Department of Geriatrics, Karolinska University Hospital, Huddinge, 171 76, Stockholm, Sweden
| | - Anders Wall
- Department of Surgical Sciences, Section of Nuclear Medicine and PET, Uppsala University Hospital, 75185, Uppsala, Sweden
| | - Maria Wiberg
- Department of Clinical Science, Intervention and Technology, Division of Medical Imaging and Technology, Karolinska Institutet, 171 77, Stockholm, Sweden.,Department of Radiology, Karolinska University Hospital, 171 76, Stockholm, Sweden
| | - Bengt Winblad
- Department of Neurobiology, Care Sciences and Society, Karolinska Institutet, 171 77, Stockholm, Sweden.,Department of Geriatrics, Karolinska University Hospital, Huddinge, 171 76, Stockholm, Sweden
| | - Åke Seiger
- Department of Neurobiology, Care Sciences and Society, Karolinska Institutet, 171 77, Stockholm, Sweden.,Stiftelsen Stockholms Sjukhem, Mariebergsgatan 22, 112 35, Stockholm, Sweden
| | - Lars Wahlberg
- Department of Neurobiology, Care Sciences and Society, Karolinska Institutet, 171 77, Stockholm, Sweden.,NsGene Inc., 225 Chapman Street, Providence, RI, 02905-4533, USA
| | - Per Almqvist
- Department of Clinical Neuroscience, Karolinska Institutet, 171 77, Stockholm, Sweden. .,Department of Neurosurgery, Karolinska University Hospital Solna, Building R3:02, 171 76, Stockholm, Sweden.
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17
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Karami A, Courtenay SC. Glutathione S-transferase activities in African catfish injected with β-naphthoflavone: effects of ploidy, gender, dose, and sampling time. Environ Monit Assess 2015; 187:681. [PMID: 26452505 DOI: 10.1007/s10661-015-4906-7] [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] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/29/2015] [Accepted: 09/30/2015] [Indexed: 06/05/2023]
Abstract
Glutathione S-transferases (GST) are considered among the most controversial biomarkers of water pollutants in fish with little known about factors influencing their activities. The objective of this study was to investigate how gender, dose, ploidy, and sampling time alter hepatic GST activities in African catfish (Clarias gariepinus) following β-naphthoflavone (β-NF) injection. Newly matured male and female diploid and triploid fish were intraperitoneally (i.p.) injected with 0, 15, or 75 mg/kg of β-NF, and livers were excised 24, 48, and 72 h post-injection. Results showed that hepatic GST activities were significantly inhibited by both doses of β-NF. Inhibition was greater in females than males, but no significant differences were observed between diploid and triploid fish. Enzymatic activities differed over time with lowest levels 72 h post-injection. These results extend our understanding of GST activity in fish and highlight the necessity of considering confounding factors when comparing different studies.
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Affiliation(s)
- A Karami
- Laboratory of Aquatic Toxicology, Faculty of Medicine and Health Sciences, Universiti Putra Malaysia, 43400, Serdang, Selangor, Malaysia.
| | - S C Courtenay
- Department of Environment and Resource Studies, Canadian Water Network, Canadian Rivers Institute, University of Waterloo, Waterloo, ON, Canada
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18
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Ferreira D, Westman E, Eyjolfsdottir H, Almqvist P, Lind G, Linderoth B, Seiger A, Blennow K, Karami A, Darreh-Shori T, Wiberg M, Simmons A, Wahlund LO, Wahlberg L, Eriksdotter M. Brain changes in Alzheimer's disease patients with implanted encapsulated cells releasing nerve growth factor. J Alzheimers Dis 2015; 43:1059-72. [PMID: 25147108 DOI: 10.3233/jad-141068] [Citation(s) in RCA: 61] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
New therapies with disease-modifying effects are urgently needed for treating Alzheimer's disease (AD). Nerve growth factor (NGF) protein has demonstrated regenerative and neuroprotective effects on basal forebrain cholinergic neurons in animal studies. In addition, AD patients treated with NGF have previously shown improved cognition, EEG activity, nicotinic binding, and glucose metabolism. However, no study to date has analyzed brain atrophy in patients treated with NGF producing cells. In this study we present MRI results of the first clinical trial in patients with AD using encapsulated NGF biodelivery to the basal forebrain. Six AD patients received the treatment during twelve months. Patients were grouped as responders and non-responders according to their twelve-months change in MMSE. Normative values were created from 131 AD patients from ADNI, selecting 36 age- and MMSE-matched patients for interpreting the longitudinal changes in MMSE and brain atrophy. Results at baseline indicated that responders showed better clinical status and less pathological levels of cerebrospinal fluid (CSF) Aβ1-42. However, they showed more brain atrophy, and neuronal degeneration as evidenced by higher CSF levels of T-tau and neurofilaments. At follow-up, responders showed less brain shrinkage and better progression in the clinical variables and CSF biomarkers. Noteworthy, two responders showed less brain shrinkage than the normative ADNI group. These results together with previous evidence supports the idea that encapsulated biodelivery of NGF might have the potential to become a new treatment strategy for AD with both symptomatic and disease-modifying effects.
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Affiliation(s)
- Daniel Ferreira
- Department of Neurobiology, Care Sciences and Society, Karolinska Institutet, Stockholm, Sweden
| | - Eric Westman
- Department of Neurobiology, Care Sciences and Society, Karolinska Institutet, Stockholm, Sweden
| | - Helga Eyjolfsdottir
- Department of Neurobiology, Care Sciences and Society, Karolinska Institutet, Stockholm, Sweden Department of Geriatrics, Karolinska University Hospital, Stockholm, Sweden
| | - Per Almqvist
- Department of Clinical Neuroscience, Karolinska Institutet, Stockholm, Sweden Department of Neurosurgery, Karolinska University Hospital, Stockholm, Sweden
| | - Göran Lind
- Department of Clinical Neuroscience, Karolinska Institutet, Stockholm, Sweden Department of Neurosurgery, Karolinska University Hospital, Stockholm, Sweden
| | - Bengt Linderoth
- Department of Clinical Neuroscience, Karolinska Institutet, Stockholm, Sweden Department of Neurosurgery, Karolinska University Hospital, Stockholm, Sweden
| | - Ake Seiger
- Department of Neurobiology, Care Sciences and Society, Karolinska Institutet, Stockholm, Sweden Department of Geriatrics, Karolinska University Hospital, Stockholm, Sweden Stockholms Sjukhem, Stockholm, Sweden
| | - Kaj Blennow
- Department of Clinical Neuroscience, Clinical Neurochemistry Laboratory, University of Göteborg, Mölndal Campus, Sweden
| | - Azadeh Karami
- Department of Neurobiology, Care Sciences and Society, Karolinska Institutet, Stockholm, Sweden
| | - Taher Darreh-Shori
- Department of Neurobiology, Care Sciences and Society, Karolinska Institutet, Stockholm, Sweden
| | - Maria Wiberg
- Department of Clinical Science, Intervention and Technology, Division of Medical Imaging and Technology, Karolinska Institutet, Stockholm, Sweden Department of Radiology, Karolinska University Hospital, Stockholm, Sweden
| | - Andrew Simmons
- Department of Neuroimaging, Institute of Psychiatry, King's College London, London, UK
| | - Lars-Olof Wahlund
- Department of Neurobiology, Care Sciences and Society, Karolinska Institutet, Stockholm, Sweden Department of Geriatrics, Karolinska University Hospital, Stockholm, Sweden
| | | | - Maria Eriksdotter
- Department of Neurobiology, Care Sciences and Society, Karolinska Institutet, Stockholm, Sweden Department of Geriatrics, Karolinska University Hospital, Stockholm, Sweden
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19
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Karami A, Eyjolfsdottir H, Vijayaraghavan S, Lind G, Almqvist P, Kadir A, Linderoth B, Andreasen N, Blennow K, Wall A, Westman E, Ferreira D, Kristoffersen Wiberg M, Wahlund LO, Seiger Å, Nordberg A, Wahlberg L, Darreh-Shori T, Eriksdotter M. Changes in CSF cholinergic biomarkers in response to cell therapy with NGF in patients with Alzheimer's disease. Alzheimers Dement 2015; 11:1316-28. [PMID: 25676388 DOI: 10.1016/j.jalz.2014.11.008] [Citation(s) in RCA: 47] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2014] [Revised: 09/26/2014] [Accepted: 11/20/2014] [Indexed: 12/31/2022]
Abstract
INTRODUCTION The extensive loss of central cholinergic functions in Alzheimer's disease (AD) brain is linked to impaired nerve growth factor (NGF) signaling. The cardinal cholinergic biomarker is the acetylcholine synthesizing enzyme, choline acetyltransferase (ChAT), which has recently been found in cerebrospinal fluid (CSF). The purpose of this study was to see if EC-NGF therapy will alter CSF levels of cholinergic biomarkers, ChAT, and acetylcholinesterase. METHOD Encapsulated cell implants releasing NGF (EC-NGF) were surgically implanted bilaterally in the basal forebrain of six AD patients for 12 months and cholinergic markers in CSF were analyzed. RESULTS Activities of both enzymes were altered after 12 months. In particular, the activity of soluble ChAT showed high correlation with cognition, CSF tau and amyloid-β, in vivo cerebral glucose utilization and nicotinic binding sites, and morphometric and volumetric magnetic resonance imaging measures. DISCUSSION A clear pattern of association is demonstrated showing a proof-of-principle effect on CSF cholinergic markers, suggestive of a beneficial EC-NGF implant therapy.
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Affiliation(s)
- Azadeh Karami
- Department of Neurobiology, Care Sciences and Society, Karolinska Institutet, Stockholm, Sweden; Department of Geriatrics, Karolinska University Hospital, Stockholm, Sweden
| | - Helga Eyjolfsdottir
- Department of Neurobiology, Care Sciences and Society, Karolinska Institutet, Stockholm, Sweden; Department of Geriatrics, Karolinska University Hospital, Stockholm, Sweden
| | - Swetha Vijayaraghavan
- Department of Neurobiology, Care Sciences and Society, Karolinska Institutet, Stockholm, Sweden
| | - Göran Lind
- Department of Clinical Neuroscience, Karolinska Institutet, Stockholm, Sweden; Department of Neurosurgery, Karolinska University Hospital, Stockholm, Sweden
| | - Per Almqvist
- Department of Clinical Neuroscience, Karolinska Institutet, Stockholm, Sweden; Department of Neurosurgery, Karolinska University Hospital, Stockholm, Sweden
| | - Ahmadul Kadir
- Department of Neurobiology, Care Sciences and Society, Karolinska Institutet, Stockholm, Sweden
| | - Bengt Linderoth
- Department of Clinical Neuroscience, Karolinska Institutet, Stockholm, Sweden; Department of Neurosurgery, Karolinska University Hospital, Stockholm, Sweden
| | - Niels Andreasen
- Department of Neurobiology, Care Sciences and Society, Karolinska Institutet, Stockholm, Sweden; Department of Geriatrics, Karolinska University Hospital, Stockholm, Sweden
| | - Kaj Blennow
- Department of Clinical Neuroscience, Clinical Neurochemistry Laboratory, University of Göteborg, Göteborg, Sweden
| | - Anders Wall
- Nuclear medicine and PET, Department of Surgical Sciences, Uppsala University, Sweden
| | - Eric Westman
- Department of Neurobiology, Care Sciences and Society, Karolinska Institutet, Stockholm, Sweden; Department of Geriatrics, Karolinska University Hospital, Stockholm, Sweden
| | - Daniel Ferreira
- Department of Neurobiology, Care Sciences and Society, Karolinska Institutet, Stockholm, Sweden
| | - Maria Kristoffersen Wiberg
- Department of Clinical Sciences, Intervention and Technology, Karolinska Institutet, Stockholm, Sweden; Department of Radiology, Karolinska University Hospital, Stockholm, Sweden
| | - Lars-Olof Wahlund
- Department of Neurobiology, Care Sciences and Society, Karolinska Institutet, Stockholm, Sweden; Department of Geriatrics, Karolinska University Hospital, Stockholm, Sweden
| | | | - Agneta Nordberg
- Department of Neurobiology, Care Sciences and Society, Karolinska Institutet, Stockholm, Sweden; Department of Geriatrics, Karolinska University Hospital, Stockholm, Sweden
| | | | - Taher Darreh-Shori
- Department of Neurobiology, Care Sciences and Society, Karolinska Institutet, Stockholm, Sweden; Department of Geriatrics, Karolinska University Hospital, Stockholm, Sweden.
| | - Maria Eriksdotter
- Department of Neurobiology, Care Sciences and Society, Karolinska Institutet, Stockholm, Sweden; Department of Geriatrics, Karolinska University Hospital, Stockholm, Sweden.
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Karami A, Mazloom Zadeh S, Rastin A, Karami A, Shiri P. The consistency of antibiotic resistance' results in two methods of disk diffusion and MIC in isolated organisms from patients with urinary tract infections. J Med Life 2015; 8:282-286. [PMID: 28316745 PMCID: PMC5319302] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022] Open
Abstract
Introduction: The urinary tract infection is the most common infection and drug resistance to it is increasing. Due to the acute infection, the prescribing of medicine is conducted before culture and antibiogram and according to the results, disk diffusion is adjusted. The aim of this study was to compare it with MIC to determine to what extent the current method could be useful. Methods: This descriptive cross-sectional investigation research regarding drug resistance was conducted with the help of two methods of disk diffusion and MIC on the isolations of patients' urine culture with UTI (midstream clean catch). Bacterial resistance was measured, and sensitivity and specificity were evaluated. Results: The MIC method was considered the gold standard and, according to the related formula, the sensitivity and specificity of disk diffusion were related to 13 antibiotics obtained as it follows: ciprofloxacin 69% and 69.1% (0.0001 > p and Kappa = .292), cotrimoxazole 50% and 77.3% (p = 0.010), nitrofurantoin 84.7% and 58.2% (0.0001 > p and Kappa = 0.44), ampicilin 83.3% and 85.3% (0.0001 > p and Kappa = 0.33), ofloxacin 65.5% and 83.9% (0.0001 > p and Kappa = 0.429), cephalexin 46.2% and 75.2% (p = 0.012 and Kappa = 0.116), gentamicin 64.2% and 66% (0.0001 > p and Kappa = 0.276), ceftriaxone 27.6% and 80.9% (p = 0.216 and Kappa = 0.074), nalidixic acid 42.1% and 89.2% (0.0001 > p and Kappa = 0.354), imipenem 63.4% and 70.4% (0.0001 > p and Kappa 0.306), co-amoxiclav 83% and 71% (0.0001 > p and Kappa = 0.412), cefixime 21% and 80.9% (0.0001 > p and Kappa = 0.412), vancomycin 55.9% and 94.7 (0.9001 > p and Kappa = 0.532). Sensitivity and specificity of this method were reported to be lower than MIC. Conclusions: Due to the low sensitivity and specificity of the disk diffusion method, antibiotic therapy should be certainly considered in clinical conditions, and risk factors for the infection and only by this approach cannot prescribe the drug.
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Affiliation(s)
- A Karami
- Infectious Disease Department, Zanjan University of Medical Sciences, Zanjan, Iran
| | - S Mazloom Zadeh
- Epidemiology Department, Zanjan University of Medical Sciences, Zanjan, Iran
| | - A Rastin
- Shahid Beheshti Hospital; Zanjan University of Medical Sciences, Zanjan, Iran
| | - A Karami
- Cardiology Ward, Emam Ali Hospital; Kermanshah University of Medical Science, Kermanshah, Iran
| | - P Shiri
- Zanjan University of Medical Sciences, Zanjan, Iran
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Karami A, Baradaran A. Comparative evaluation of three different methods for HbA1c measurement with High-performance liquid chromatography in diabetic patients. Adv Biomed Res 2014; 3:94. [PMID: 24800183 PMCID: PMC4007341 DOI: 10.4103/2277-9175.129364] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2012] [Accepted: 06/09/2012] [Indexed: 01/13/2023] Open
Abstract
Background: The global prevalence of diabetes mellitus is increasing rapidly. Measurement of glycated hemoglobin, predominantly HbA1c, is fundamental to the management of patients with diabetes. HbA1c is used to monitor long-term glycemic control, adjust therapy, assess the quality of diabetes care and predict the risk for the development of complications. While HbA1c is the standard method for long-term glycemic control in diabetic patients, there are different methods for measurement of HbA1c and all laboratories do not use the reference method (high-performance liquid chromatography [HPLC]). The objective of this study is comparison of three different methods with HPLC to find out which method has an acceptable concordance and correlation with the reference method. Materials and Methods: Fifty-eight diabetic patients were assessed in this study. The blood sample of each patient was checked with Diazyme (enzymatic assay), Nycocard (boronate-affinity binding) and Biosystem (micro column chromatography). The values of HbA1c of each method were compared with the Knauer-HPLC results. Results: The means of the differential values between each method and HPLC in the ANOVA test are as follows: M = 1.8, SD = 1.09 for Nycocard-HPLC; M = 1.5, SD = 1.08 for biosystem-HPLC; M = 1.3, SD = 1.2 for Diazyme-HPLC. Pearson's correlation coefficient between HPLC and Nycocard; 0.76, HPLC and Diazyme; 0.75 and between HPLC and Biosystem was 0.68. Linear regression parameters for each method with HPLC were also determined. Conclusion: Diazyme had a better performance and showed a greater concordance with HPLC among others, although it was not an ideal alternative for HPLC.
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Affiliation(s)
- Azadeh Karami
- Department of Pathology, Isfahan University of Medial Science, Iran
| | - Azar Baradaran
- Department of Pathology, Isfahan University of Medial Science, Iran
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Imani FAA, Iman ID, Hosseini DR, Karami A, Marashi SM. Design of a multiplex PCR method for detection of toxigenic-pathogenic in Vibrio cholerae. ASIAN PAC J TROP MED 2013; 6:115-8. [PMID: 23339912 DOI: 10.1016/s1995-7645(13)60005-x] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2012] [Revised: 11/15/2012] [Accepted: 12/15/2012] [Indexed: 10/27/2022] Open
Abstract
OBJECTIVE To study virulence and regulatory genes (hlyA, ctxB, tcpI) in clinical strains of Vibrio cholerae (V. cholerae), simultaneously. METHODS Three important genes, tcpI, hlyA and ctxB were used for detection of toxigenic and pathogenic V. cholera by chain reaction assay method. RESULTS According to the results of the PCR, the incidence of hlyA, tcpI, and ctxB genes in clinical isolates was obtained as 94.7% (72 sample), 90.8% (69 sample), and 92.1% (70 sample), respectively. Five strains possessed all genes except ctxB, six strains possessed all genes except tcpI, four strains possessed all genes except hlyA, one strain possessed only hlyA and 60 strains contained a combination of three genes, Including hlyA, ctxB and tcpI. CONCLUSIONS Result show that this method could be reliable to detect toxigenic-pathogenic strains of V. cholerae in Iran.
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Affiliation(s)
- Fooladi A A Imani
- Applied Microbiology Research Center, Baqiyatallah University of Medical Sciences, Tehran, Iran.
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Vijayaraghavan S, Karami A, Aeinehband S, Behbahani H, Grandien A, Nilsson B, Ekdahl KN, Lindblom RPF, Piehl F, Darreh-Shori T. Regulated Extracellular Choline Acetyltransferase Activity- The Plausible Missing Link of the Distant Action of Acetylcholine in the Cholinergic Anti-Inflammatory Pathway. PLoS One 2013; 8:e65936. [PMID: 23840379 PMCID: PMC3686815 DOI: 10.1371/journal.pone.0065936] [Citation(s) in RCA: 64] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2013] [Accepted: 04/30/2013] [Indexed: 11/18/2022] Open
Abstract
Acetylcholine (ACh), the classical neurotransmitter, also affects a variety of nonexcitable cells, such as endothelia, microglia, astrocytes and lymphocytes in both the nervous system and secondary lymphoid organs. Most of these cells are very distant from cholinergic synapses. The action of ACh on these distant cells is unlikely to occur through diffusion, given that ACh is very short-lived in the presence of acetylcholinesterase (AChE) and butyrylcholinesterase (BuChE), two extremely efficient ACh-degrading enzymes abundantly present in extracellular fluids. In this study, we show compelling evidence for presence of a high concentration and activity of the ACh-synthesizing enzyme, choline-acetyltransferase (ChAT) in human cerebrospinal fluid (CSF) and plasma. We show that ChAT levels are physiologically balanced to the levels of its counteracting enzymes, AChE and BuChE in the human plasma and CSF. Equilibrium analyses show that soluble ChAT maintains a steady-state ACh level in the presence of physiological levels of fully active ACh-degrading enzymes. We show that ChAT is secreted by cultured human-brain astrocytes, and that activated spleen lymphocytes release ChAT itself rather than ACh. We further report differential CSF levels of ChAT in relation to Alzheimer's disease risk genotypes, as well as in patients with multiple sclerosis, a chronic neuroinflammatory disease, compared to controls. Interestingly, soluble CSF ChAT levels show strong correlation with soluble complement factor levels, supporting a role in inflammatory regulation. This study provides a plausible explanation for the long-distance action of ACh through continuous renewal of ACh in extracellular fluids by the soluble ChAT and thereby maintenance of steady-state equilibrium between hydrolysis and synthesis of this ubiquitous cholinergic signal substance in the brain and peripheral compartments. These findings may have important implications for the role of cholinergic signaling in states of inflammation in general and in neurodegenerative disease, such as Alzheimer's disease and multiple sclerosis in particular.
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Affiliation(s)
- Swetha Vijayaraghavan
- Division of Alzheimer Neurobiology Center, Karolinska Institutet, Department of Neurobiology, Care Sciences and Society, Huddinge, Stockholm, Sweden
| | - Azadeh Karami
- Division of Alzheimer Neurobiology Center, Karolinska Institutet, Department of Neurobiology, Care Sciences and Society, Huddinge, Stockholm, Sweden
| | - Shahin Aeinehband
- Department of Clinical Neuroscience, Unit for Neuroimmunology, Solna, Stockholm, Sweden
| | - Homira Behbahani
- Division of Alzheimer Disease Research Center, Karolinska Institutet, Department of Neurobiology, Care Sciences and Society, Huddinge, Stockholm, Sweden
| | - Alf Grandien
- Department of Medicine, Center for Hematology and Regenerative Medicine, Huddinge, Stockholm, Sweden
| | - Bo Nilsson
- Department of Immunology, Genetics and Pathology, Division of Clinical Immunology, Uppsala University, Uppsala, Sweden
| | - Kristina N. Ekdahl
- Department of Immunology, Genetics and Pathology, Division of Clinical Immunology, Uppsala University, Uppsala, Sweden
- Linnæus Center of Biomaterials Chemistry, Linnæus University, Kalmar, Sweden
| | | | - Fredrik Piehl
- Department of Clinical Neuroscience, Unit for Neuroimmunology, Solna, Stockholm, Sweden
| | - Taher Darreh-Shori
- Division of Alzheimer Neurobiology Center, Karolinska Institutet, Department of Neurobiology, Care Sciences and Society, Huddinge, Stockholm, Sweden
- * E-mail:
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Tavana AM, Ranjbar R, Ataee RA, Gerami ME, Gooya MM, Karami A, Naderinasab MR, Golmohammadi R. A Study Investigating theStreptococcus PneumoniaePattern Among Iranian patients. Arch Pharma Pract 2012. [DOI: 10.4103/2045-080x.112808] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022] Open
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Javaud N, Karami A, Stirnemann J, Chassaignon C, Branellec A, Pilot F, Adnet F, Fain O. Les angiœdèmes bradykiniques aux urgences. Rev Med Interne 2011. [DOI: 10.1016/j.revmed.2011.10.344] [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: 10/15/2022]
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Pourmand G, Saraji A, Dehgani S, Mehrsai A, Karami A, Shokohida W. UP-02.220 Exraperitoneal Orthotopic Radical Cystoprostatectomy Approach Can Improve Postoperative Morbidity. Urology 2011. [DOI: 10.1016/j.urology.2011.07.1038] [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: 10/15/2022]
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Yazdani Kachoei M, Karami A, Baradaran S, Shirani M, Yazdani A. UP-2.041: Diagnostic Value of Urine Polymerase Chain Reaction in Genitourinary Tuberculosis. Urology 2009. [DOI: 10.1016/j.urology.2009.07.260] [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: 10/19/2022]
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Yazdani Kachoei M, Karami A, Shahrzad B, Yazdani A, Rafati A. MP-20.08: Evaluation of P53 and CD44 as Markers of Tumor Recurrence in Low Risk Superficial Transitional Cell Carcinoma of the Bladder. Urology 2009. [DOI: 10.1016/j.urology.2009.07.769] [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: 10/20/2022]
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Abstract
This study was carried out to evaluate the nested PCR for specific detection of different strains of B. burgdorferi. Five strains of B. burgdorferi including ACA-1, B-31, 2B45, 3B45, 7B49 obtained from different countries were used in this study. The strains of B. hermsii, Escherichia. coli and T. pallidum were also included as control strains. Two pairs of nested PCR primers were used to amplify the gene encoding the Osp-A protein of B. burgdorfer under standard PCR condition. In a two stage procedure, nested PCR yielded a positive reaction for five tested strains of B. burgdorferi. None the strains including B. hermsii, E. coli and T. pallidum showed positive reaction when used as control strains in PCR. In conclusion, nested PCR showed acceptable specificity for rapid detection ofB. burgdorferi.
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Affiliation(s)
- R Sorouri
- Faculty of Medicine, Zanjan Medical Sciences University, Zanjan, Iran
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Ghaffari A, Miller C, Jalili R, Karami A, Ghahary A. 141
Potential Use of Nitric Oxide Gas as an Antimicrobial Agent in Cutaneous Wound Infection. Wound Repair Regen 2008. [DOI: 10.1111/j.1067-1927.2005.130216as.x] [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: 11/29/2022]
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Emadi H, Hajabdolbaghi M, Rasoolinejad M, Jafari S, Khairandish P, Taheri L, Karami A. P1073 Outcome of pregnancy in pregnant women vaccinated in the mass campaign against measles/rubella in Tehran, Iran. Int J Antimicrob Agents 2007. [DOI: 10.1016/s0924-8579(07)70913-5] [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: 10/23/2022]
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Karami A, Balke ST, Schunk TC. Quantitative interpretation of Fourier-transform infrared spectoscopic data from a size--exlusion chromatorgraphy solvent- evaporation interface. J Chromatogr A 2001; 911:27-37. [PMID: 11269593 DOI: 10.1016/s0021-9673(00)01186-9] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.5] [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: 12/01/2022]
Abstract
Quantitative evaluation of polymer composition across the SEC chromatogram can provide more accurate characterization of heterogeneous polymer samples for problem solving and for material specification. To this end Fourier-transform infrared spectroscopy (FTIR) with solvent-evaporation interfaces has become a very powerful detector for size-exclusion chromatography (SEC). The solvent-evaporation interface removes the mobile phase at the exit of the chromatograph and deposits the separated molecular sizes as polymer films on infrared transparent substrates. Quantitative interpretation of the FTIR spectra obtained from these films has recently been found to be best accomplished by using partial least squares. In this paper, polystyrene and poly(methylmethacrylate), alone, as blends, and a copolymer were analyzed in a SEC equipped with an evaporative interface. Molecular weight effects, wavelength selection, the effect of averaging spectra on results, and selection of the best data preprocessing method were investigated. General methods of evaluating these variables were developed to arrive at conditions for this particular "model" situation in order to provide a basis for the analysis of more complex polymers.
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Affiliation(s)
- A Karami
- Department of Chemical Engineering and Applied Chemistry, University of Toronto, Ontario, Canada
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Abstract
With the increasing popularity of evaporative interfaces, detection using Fourier Transform Infrared (FTIR) spectrometry in the mid-infrared region is becoming more important in size-exclusion chromatography (SEC). FTIR spectrometry is a powerful, and potentially very widely applicable, method for obtaining chemical functional group information for each molecular size fraction. Quantitative evaluation of polymer composition across the SEC chromatogram can provide more accurate characterization of heterogeneous polymer samples for problem solving and for material specification. The evaporative interface removes the SEC mobile phase at the exit of the column and deposits the eluting polymer as a continuous film stripe or as a series of discrete films on infrared transparent substrates. Initially this detection approach was used only for qualitative analysis. More recently, it is being used quantitatively. Previously we demonstrated that the quality of the film generated by the evaporative interface was critical to determining the suitability of the resulting FTIR spectra for quantitative analysis. In a continuation of this work, the objective of this paper is to develop a procedure for obtaining valid quantitative results for polymer blends with the interface. Experimental topics include improving the quality of polymer films by post-SEC treatments, off-line FTIR calibrating using other means to obtain high quality polymer films, and utilizing in-line SEC detectors in calibration. Interpretation aspects focus upon peak fitting of FTIR spectra, linear regression, partial least squares, and data pre-processing. PLS prediction with internal calibration using the second derivative of solvent-annealed film spectra was found to provide the best compromise between processing time, accuracy and precision.
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Affiliation(s)
- K Torabi
- Department of Chemical Engineering and Applied Chemistry, University of Toronto, Ontario, Canada
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