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Tajeddin N, Arabfard M, Alizadeh S, Salesi M, Khamse S, Delbari A, Ohadi M. Novel islands of GGC and GCC repeats coincide with human evolution. Gene 2024; 902:148194. [PMID: 38262548 DOI: 10.1016/j.gene.2024.148194] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2023] [Revised: 10/29/2023] [Accepted: 01/18/2024] [Indexed: 01/25/2024]
Abstract
BACKGROUND Because of high mutation rate, overrepresentation in genic regions, and link with various neurological, neurodegenerative, and movement disorders, GGC and GCC short tandem repeats (STRs) are prone to natural selection. Among a number of lacking data, the 3-repeats of these STRs remain widely unexplored. RESULTS In a genome-wide search in human, here we mapped GGC and GCC STRs of ≥3-repeats, and found novel islands of up to 45 of those STRs, populating spans of 1 to 2 kb of genomic DNA. RGPD4 and NOC4L harbored the densest (GGC)3 (probability 3.09061E-71) and (GCC)3 (probability 1.72376E-61) islands, respectively, and were human-specific. We also found prime instances of directional incremented density of STRs at specific loci in human versus other species, including the FOXK2 and SKI GGC islands. The genes containing those islands significantly diverged in expression in human versus other species, and the proteins encoded by those genes interact closely in a physical interaction network, consequence of which may be human-specific characteristics such as higher order brain functions. CONCLUSION We report novel islands of GGC and GCC STRs of evolutionary relevance to human. The density, and in some instances, periodicity of these islands support them as a novel genomic entity, which need to be further explored in evolutionary, mechanistic, and functional platforms.
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Affiliation(s)
- N Tajeddin
- Iranian Research Center on Aging, University of Social Welfare and Rehabilitation Sciences, Tehran, Iran
| | - M Arabfard
- Chemical Injuries Research Center, Systems Biology and Poisonings Institute, Baqiyatallah University of Medical Sciences, Tehran, Iran
| | - S Alizadeh
- Iranian Research Center on Aging, University of Social Welfare and Rehabilitation Sciences, Tehran, Iran
| | - M Salesi
- Chemical Injuries Research Center, Systems Biology and Poisonings Institute, Baqiyatallah University of Medical Sciences, Tehran, Iran
| | - S Khamse
- Iranian Research Center on Aging, University of Social Welfare and Rehabilitation Sciences, Tehran, Iran
| | - A Delbari
- Iranian Research Center on Aging, University of Social Welfare and Rehabilitation Sciences, Tehran, Iran
| | - M Ohadi
- Iranian Research Center on Aging, University of Social Welfare and Rehabilitation Sciences, Tehran, Iran.
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Khamse S, Alizadeh S, Khorshid HRK, Delbari A, Tajeddin N, Ohadi M. A Hypermutable Region in the DISP2 Gene Links to Natural Selection and Late-Onset Neurocognitive Disorders in Humans. Mol Neurobiol 2024:10.1007/s12035-024-04155-y. [PMID: 38565786 DOI: 10.1007/s12035-024-04155-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2023] [Accepted: 03/25/2024] [Indexed: 04/04/2024]
Abstract
(CCG) short tandem repeats (STRs) are predominantly enriched in genic regions, mutation hotspots for C to T truncating substitutions, and involved in various neurological and neurodevelopmental disorders. However, intact blocks of this class of STRs are widely overlooked with respect to their link with natural selection. The human neuron-specific gene, DISP2 (dispatched RND transporter family member 2), contains a (CCG) repeat in its 5' untranslated region. Here, we sequenced this STR in a sample of 448 Iranian individuals, consisting of late-onset neurocognitive disorder (NCD) (N = 203) and controls (N = 245). We found that the region spanning the (CCG) repeat was highly mutated, resulting in several flanking (CCG) residues. However, an 8-repeat of the (CCG) repeat was predominantly abundant (frequency = 0.92) across the two groups. While the overall distribution of genotypes was not different between the two groups (p > 0.05), we detected four genotypes in the NCD group only (2% of the NCD genotypes, Mid-p = 0.02), consisting of extreme short alleles, 5- and 6-repeats, that were not detected in the control group. The patients harboring those genotypes received the diagnoses of probable Alzheimer's disease and vascular dementia. We also found six genotypes in the control group only (2.5% of the control genotypes, Mid-p = 0.01) that consisted of the 8-repeat and extreme long alleles, 9- and 10-repeats, of which the 10-repeat was not detected in the NCD group. The (CCG) repeat specifically expanded in primates. In conclusion, we report an indication of natural selection at a novel hypermutable region in the human genome and divergent alleles and genotypes in late-onset NhCDs and controls. These findings reinforce the hypothesis that a collection of rare alleles and genotypes in a number of genes may unambiguously contribute to the cognition impairment component of late-onset NCDs.
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Affiliation(s)
- S Khamse
- Iranian Research Center on Aging, University of Social Welfare and Rehabilitation Sciences, Tehran, Iran
| | - S Alizadeh
- Iranian Research Center on Aging, University of Social Welfare and Rehabilitation Sciences, Tehran, Iran
| | - H R Khorram Khorshid
- Personalized Medicine and Genometabolomics Research Center, Hope Generation Foundation, Tehran, Iran
| | - A Delbari
- Iranian Research Center on Aging, University of Social Welfare and Rehabilitation Sciences, Tehran, Iran.
| | - N Tajeddin
- Iranian Research Center on Aging, University of Social Welfare and Rehabilitation Sciences, Tehran, Iran
- Department of Biology, Central Tehran Branch, Islamic Azad University, Tehran, Iran
| | - M Ohadi
- Iranian Research Center on Aging, University of Social Welfare and Rehabilitation Sciences, Tehran, Iran.
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Arabfard M, Tajeddin N, Alizadeh S, Salesi M, Bayat H, Khorram Khorshid HR, Khamse S, Delbari A, Ohadi M. Dyads of GGC and GCC form hotspot colonies that coincide with the evolution of human and other great apes. BMC Genom Data 2024; 25:21. [PMID: 38383300 PMCID: PMC10880355 DOI: 10.1186/s12863-024-01207-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2023] [Accepted: 02/11/2024] [Indexed: 02/23/2024] Open
Abstract
BACKGROUND GGC and GCC short tandem repeats (STRs) are of various evolutionary, biological, and pathological implications. However, the fundamental two-repeats (dyads) of these STRs are widely unexplored. RESULTS On a genome-wide scale, we mapped (GGC)2 and (GCC)2 dyads in human, and found monumental colonies (distance between each dyad < 500 bp) of extraordinary density, and in some instances periodicity. The largest (GCC)2 and (GGC)2 colonies were intergenic, homogeneous, and human-specific, consisting of 219 (GCC)2 on chromosome 2 (probability < 1.545E-219) and 70 (GGC)2 on chromosome 9 (probability = 1.809E-148). We also found that several colonies were shared in other great apes, and directionally increased in density and complexity in human, such as a colony of 99 (GCC)2 on chromosome 20, that specifically expanded in great apes, and reached maximum complexity in human (probability 1.545E-220). Numerous other colonies of evolutionary relevance in human were detected in other largely overlooked regions of the genome, such as chromosome Y and pseudogenes. Several of the genes containing or nearest to those colonies were divergently expressed in human. CONCLUSION In conclusion, (GCC)2 and (GGC)2 form unprecedented genomic colonies that coincide with the evolution of human and other great apes. The extent of the genomic rearrangements leading to those colonies support overlooked recombination hotspots, shared across great apes. The identified colonies deserve to be studied in mechanistic, evolutionary, and functional platforms.
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Affiliation(s)
- M Arabfard
- Chemical Injuries Research Center, Systems Biology and Poisonings Institute, Baqiyatallah University of Medical Sciences, Tehran, Iran
| | - N Tajeddin
- Iranian Research Center on Aging, University of Social Welfare and Rehabilitation Sciences, Tehran, Iran
- Department of Biology, Central Tehran Branch, Islamic Azad University, Tehran, Iran
| | - S Alizadeh
- Iranian Research Center on Aging, University of Social Welfare and Rehabilitation Sciences, Tehran, Iran
| | - M Salesi
- Chemical Injuries Research Center, Systems Biology and Poisonings Institute, Baqiyatallah University of Medical Sciences, Tehran, Iran
- Research Center for Prevention of Oral and Dental Diseases, Baqiyatallah University of Medical Sciences, Tehran, Iran
| | - H Bayat
- Iranian Research Center on Aging, University of Social Welfare and Rehabilitation Sciences, Tehran, Iran
| | - H R Khorram Khorshid
- Personalized Medicine and Genometabolomics Research Center, Hope Generation Foundation, Tehran, Iran
| | - S Khamse
- Iranian Research Center on Aging, University of Social Welfare and Rehabilitation Sciences, Tehran, Iran
| | - A Delbari
- Iranian Research Center on Aging, University of Social Welfare and Rehabilitation Sciences, Tehran, Iran
| | - M Ohadi
- Iranian Research Center on Aging, University of Social Welfare and Rehabilitation Sciences, Tehran, Iran.
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Alizadeh S, Khamse S, Tajeddin N, Khorram Khorshid HR, Delbari A, Ohadi M. A GCC repeat in RAB26 undergoes natural selection in human and harbors divergent genotypes in late-onset Alzheimer's disease. Gene 2024; 893:147968. [PMID: 37931854 DOI: 10.1016/j.gene.2023.147968] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2023] [Revised: 10/28/2023] [Accepted: 11/03/2023] [Indexed: 11/08/2023]
Abstract
Although mainly located in genic regions and being mutation hotspots, intact blocks of CG-rich trinucleotide short tandem repeats (STRs) are largely overlooked with respect to their link with natural selection. The human RAB26 (member RAS oncogene family) directs synaptic and secretory vesicles into preautophagosomal structures, inhibition of which specifically disrupts axonal transport of degradative organelles and leads to an axonal dystrophy, resembling Alzheimer's disease (AD). Human RAB26 contains a GCC repeat in the top 1st percent in respect of length. Here we sequenced this STR in 441 Iranian individuals, consisting of late-onset neurocognitive disorder (NCD) (N = 216) and controls (N = 225). In both groups, the 12-repeat allele and the 12/12 genotype were predominantly abundant. We found excess of homozygosity for non-12 alleles in the NCD group (Mid-P exact = 0.027). Furthermore, divergent genotypes were detected that were specific to the NCD group (2.8% of genotypes) (Mid-P exact = 0.006) or controls (3.1% of genotypes) (Mid-P exact = 0.004). The patients harboring divergent genotypes received the diagnosis of AD. Based on the predominant abundance of the 12-repeat and 12/12 genotype in both groups, excess of non-12 homozygosity in the NCD group, and divergent genotypes across the NCD and control groups, we propose natural selection at this locus and link with late-onset AD. Our findings strengthen the hypothesis that a collection of rare genotypes unambiguously contribute to the pathogenesis of late-onset NCDs, such as AD.
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Affiliation(s)
- S Alizadeh
- Iranian Research Center on Aging, University of Social Welfare and Rehabilitation Sciences, Tehran, Iran
| | - S Khamse
- Iranian Research Center on Aging, University of Social Welfare and Rehabilitation Sciences, Tehran, Iran
| | - N Tajeddin
- Iranian Research Center on Aging, University of Social Welfare and Rehabilitation Sciences, Tehran, Iran
| | - H R Khorram Khorshid
- Personalized Medicine and Genometabolomics Research Center, Hope Generation Foundation, Tehran, Iran
| | - A Delbari
- Iranian Research Center on Aging, University of Social Welfare and Rehabilitation Sciences, Tehran, Iran.
| | - M Ohadi
- Iranian Research Center on Aging, University of Social Welfare and Rehabilitation Sciences, Tehran, Iran.
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Akhavan S, Sheikhhasani S, Peydayesh M, Alizadeh S, Zamani F, Zamani N. Rare presentation of retroperitoneal leiomyosarcoma mimicking a myoma in a 46-year-old woman: A case report. Clin Case Rep 2023; 11:e6909. [PMID: 36726692 PMCID: PMC9883843 DOI: 10.1002/ccr3.6909] [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] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2022] [Revised: 12/21/2022] [Accepted: 12/31/2022] [Indexed: 01/30/2023] Open
Abstract
Retroperitoneal sarcoma is relatively uncommon. We share our experience in encountering retroperitoneal sarcoma with vascular and urethral adhesion in a 46-year-old woman. Given the rarity of these tumors, evaluation and management should ideally be performed in a center equipped with multidisciplinary expertise in treating sarcomas.
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Affiliation(s)
- Setareh Akhavan
- Department of Oncologic Gynecology, Vali‐e‐Asr HospitalTehran University of Medical ScienceTehranIran
| | - Shahrzad Sheikhhasani
- Department of Oncologic Gynecology, Vali‐e‐Asr HospitalTehran University of Medical ScienceTehranIran
| | - Mohades Peydayesh
- Department of GynecologyPasteur Hospital, Bam University of Medical ScienceBamIran
| | - Shima Alizadeh
- Department of Obstetrics and Gynecology, Vali‐e‐Asr HospitalTehran University of Medical SciencesTehranIran
| | - Fatemeh Zamani
- Department of Radiology, Children Medical Centre of ExcellenceTehran University of Medical ScienceTehranIran
| | - Narges Zamani
- Department of Oncologic Gynecology, Vali‐e‐Asr HospitalTehran University of Medical ScienceTehranIran
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Abolghaseminejad P, Borhaninejad V, Khanjani N, Saber M, Alizadeh S. Relationship between self-esteem and subjective vitality among older people in Iran. Adv Gerontol 2023; 36:57-62. [PMID: 37192355] [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: 05/18/2023]
Abstract
Today, aging of the population is considered one of the most fundamental challenges worldwide. One of the important factors in active aging is paying attention to psychological variables and related factors. This study was conducted aimed to determine the relationship between self-esteem and subjective vitality of the older people in Iran, Sirjan in 2020. In this descriptive-analytical study, 200 older people aged 60 years and older were selected from comprehensive health centers in Sirjan by a two-stage random sampling method. The data were collected using the validated Rosenberg Self-Esteem Scale, and validated Subjective Vitality Scale. The data were analyzed using SPSS software version 20 using descriptive and inferential statistics, including the Mann-Whitney test, Kruskal-Wallis test, Post Hoc tests, and Spearman correlation coefficient. The mean age of the older people was 65,66±3,9 years. The the mean and standard deviation of self-esteem score was 36,34±4,62 and 21,80±2,85 for subjective vitality score. There was a positive and significant correlation between self-esteem and subjective vitality R=0,58 (p˂0,001 ). Also, gender, marital status and employment status were associated with subjective vitality (p˂0,05). Therefore, planners and policymakers should consider self-esteem and subjective vitality in designing and prioritizing interventions related to improving the health of the older people.
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Affiliation(s)
- P Abolghaseminejad
- School of Health, Kerman University of Medical Sciences, Haft-Bagh Highway 7616913555 Kerman, Iran
| | - V Borhaninejad
- Social Determinants of Health Research Center, Institute for Futures Studies in Health, Kerman University of Medical Sciences, Haft-Bagh Highway 7616913555 Kerman, Iran
| | - N Khanjani
- Environmental Health Engineering Research Center, Kerman University of Medical Sciences, Haft-Bagh Highway 7616913555 Kerman, Iran
| | - M Saber
- Department of Health Education and Promotion, School of Public Health, Kerman University of Medical Sciences, Haft-Bagh Highway 7616913555 Kerman, Iran, e-mail:
| | - S Alizadeh
- Department of Health Education and Promotion, School of Public Health, Kerman University of Medical Sciences, Haft-Bagh Highway 7616913555 Kerman, Iran, e-mail:
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Mokhtari H, Eskandarinezhad M, Barhaghi M, Asnaashari S, Sefidan F, Abedi A, Alizadeh S. Comparative antibacterial effects of ginger and marjoram extract versus conventional irrigants on mature Enterococcus faecalis biofilms: An in vitro study. J Clin Exp Dent 2023; 15:e304-e310. [PMID: 37152491 PMCID: PMC10155938 DOI: 10.4317/jced.60081] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2022] [Accepted: 01/27/2023] [Indexed: 04/03/2023] Open
Abstract
Background This study evaluated antibacterial effects of Ginger and Marjoram extract compared with Routine Intracanal Irrigants on Mature Enterococcus faecalis Biofilms. Material and Methods Sixty-six extracted human teeth, were randomly assigned to four groups 5.25% sodium hypochlorite (NaOCl), 2% chlorhexidine (CHX), chloroform extract of marjoram (Origanum majorana), and oil extract of ginger (Zingiber officinale), and two positive and negative control groups (n=11). Samples were contaminated with E. faecalis, except the negative control group. Then the root canals were irrigated with solutions above, after which dental debris was collected from each tooth separately, followed by culturing on plates containing BHI agar. The bacterial counts were finally determined with a colony counting machine. Results No bacterial growth was detected in the NaOCl, CHX, and negative control groups. However, some bacterial growth was observed in the ginger and marjoram groups. All four solutions successfully eliminated E. faecalis biofilms compared to the positive control group. Significant difference in the median bacterial growth between the ginger and marjoram groups and the positive control group (P<0.001) has been shown. There was no significant difference in median bacterial growth between the ginger and marjoram groups (P=0.94). Conclusions Chloroform extract of marjoram and oil extract of ginger were effective in eliminating 6-week-old biofilms of E. faecalis in vitro; however, their effect was not as favorable as CHX and NaOCl. These herbal extracts yielded promising results in the present study; therefore, they can be used as intracanal irrigants instead of chemical agents. Key words:Biofilm, Chlorhexidine, E. faecalis, Ginger, Marjoram, Sodium hypochlorite.
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Borhaninejad V, Alizadeh S, Fadakar MM, Saber M. Factors Affecting the Life Satisfaction of the older adult: The Role of Place attachment. Adv Gerontol 2022; 35:877-883. [PMID: 36905591] [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: 03/12/2023]
Abstract
This study examined the association between life satisfaction and place attachment in the older adult. A total of 200 subjects of Kerman city, Iran, responded to questionnaires on life satisfaction and place attachment. The data were analyzed using chi-square, analysis of variance, correlation, and hierarchical multiple regression analysis by the SPSS software version 18. Approximately 51,4% of the subjects had intermediate life satisfaction. The Life satisfaction mean was significantly lower in subjects over 80 of the male gender, single marital status, with more than 3 chronic diseases and bad self-rated health. The majority of respondents had intermediate levels of place attachment (56,6%). There was a significant correlation between life satisfaction and place attachment. Independent variables accounted for 34,2% of the variance in life satisfaction. Individuals with higher attachment had higher levels of life satisfaction than those with lower place attachment. Place attachment is an appropriate strategy to increase life satisfaction in aging.
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Affiliation(s)
- V Borhaninejad
- Social Determinants of Health Research Center, Institute for Futures Studies in Health, Kerman University of Medical Sciences, Haft-Bagh Highway, Kerman, Iran, Postal Code: 7616913555
| | - S Alizadeh
- Department of Health Education and Promotion, School of Public Health, Kerman University of Medical Sciences, Haft-Bagh Highway, Kerman, Iran, Postal Code: 7616913555
| | - M M Fadakar
- Social Determinants of Health Research Center, Institute for Futures Studies in Health, Kerman University of Medical Sciences, Haft-Bagh Highway, Kerman, Iran, Postal Code: 7616913555, e-mail:
| | - M Saber
- Social Determinants of Health Research Center, Institute for Futures Studies in Health, Kerman University of Medical Sciences, Haft-Bagh Highway, Kerman, Iran, Postal Code: 7616913555, e-mail:
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Zamani M, Mollabashi M, Mehrabi N, Alizadeh S. Aggressive angiomyxoma of vulva in 28-years old patient: A case report of second recurrence. Ann Med Surg (Lond) 2021; 69:102706. [PMID: 34429960 PMCID: PMC8368991 DOI: 10.1016/j.amsu.2021.102706] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2021] [Revised: 08/06/2021] [Accepted: 08/07/2021] [Indexed: 11/30/2022] Open
Abstract
Introduction Aggressive angiomyxoma is an uncommon mesenchymal tumor in women who are in reproductive age, that occurring in the pelvis and perineal zone with a high risk of local infiltration and recurrence. Case presentation We describe a case of a 28-year-old woman with a huge recurrent vulvar aggressive angiomyxoma. Clinical Discussion Our patients underwent surgery and tumor resection for two times but had relapsed every 2 years through 5 years and finally she underwent total vulvectomy. The patient received Decapeptide for 3 months to prevent tumor recurrence after surgery and to date,there has been no evidence of local recurrence. Conclusion Aggressive angiomyxoma is a rare tumor with high recurrence rate. The best treatment is surgical resection by experienced Gyn-oncologist in teamwork and territory Hospital. Aggressive angiomyxoma has a high trend to local recurrence. Radical surgery with wide margins is the first line of treatment. All patients counseled about the need for long-term surveillance.
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Affiliation(s)
- Mehrangiz Zamani
- Department of Obstetrics & Gynecology, Hamadan University of Medical Science, Hamadan, Iran
| | - Mina Mollabashi
- Department of Radiology, Hamadan University of Medical Science, Hamadan, Iran
| | - Narges Mehrabi
- Hamadan University of Medical Sciencesence, Hamedan, Iran
| | - Shima Alizadeh
- Gynecologist; Board Certified at Tehran University of Medical Science, Tehran, Iran
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Zamani N, Rezaei Poor M, Ghasemian Dizajmehr S, Alizadeh S, Modares Gilani M. Fertility sparing surgery in malignant ovarian Germ cell tumor (MOGCT): 15 years experiences. BMC Womens Health 2021; 21:282. [PMID: 34348686 PMCID: PMC8336352 DOI: 10.1186/s12905-021-01437-8] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/20/2021] [Accepted: 07/31/2021] [Indexed: 12/22/2022]
Abstract
Aim We aim to evaluate the reproductive outcome of fertility-sparing surgery and chemotherapy among young women diagnosed with MOGCT of any stage. Methods In the current retrospective study we evaluated 79 patients with malignant ovarian germ cell tumors (MOGCT) who visited at Imam Center, Vali-e-asr Hospital, Gynecologic Oncology department during 2001–2016. Reproductive outcomes (menstruation status and childbearing) followed fertility-preserving surgery and adjuvant chemotherapy by filling questionnaires. Statistical analysis was done with SPSS software, Chi-Square Tests were done, and significance was determined at P ≤ 0.05. Results among 79 young women who underwent fertility-sparing treatment, 72 patients followed up for reproductive outcome, and 7 patients excluded because of death (3 cases), XY genotyping (3 cases), and bilateral ovarian involvement (1 case). The mean age at presentation was 23 years. (Range: 19–33 years). The 5 and 10-year disease-free survival rate was 87% and 94.4%, respectively. The overall survival rate (OSR) was 94.4% at 5 and 10 years. Regular menstruation recovered in 60 of 72 patients after treatment (83%). All patients without adjuvant chemotherapy experienced regular menstruation, while normal menstruation was retrieved in 78% in the adjuvant chemotherapy group at the end of treatment. This retrieval of regular menstruation was not dependent on the age or number of chemotherapy cycles. 19 of 26 patients who attempted pregnancy were led to delivery (73%). No one required infertility treatments. The mean of chemotherapy cycles is related to a successful pregnancy. Conclusion We showed patients with MOGCT could become pregnant and give birth if they desire. The advanced tumor stage wasn't the convincing factor for avoiding fertility preservation. Fertility sparing surgery with adjuvant chemotherapy is a safe treatment and results in a high fertility rate.
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Affiliation(s)
- Narges Zamani
- Department of Gynecologic Oncology, Vali-E-Asr Hospital, Tehran University of Medical Science, Tehran, Iran
| | - Mohadese Rezaei Poor
- Department of Obstetrics and Gynecology, Niknafs Hospital, Rafsanjan University of Medical Science, Rafsanjan, Iran
| | | | - Shima Alizadeh
- Department of Obstetrics and Gynecology, Vali-E-Asr Hospital, Tehran University of Medical Sciences, Keshavarz Avenue, Imam Complex, Tehran, Iran.
| | - Mitra Modares Gilani
- Department of Gynecologic Oncology, Vali-E-Asr Hospital, Tehran University of Medical Science, Tehran, Iran
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11
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Lee H, Sohn S, Alizadeh S, Kwon S, Kim TJ, Park SM, Soh HT, Mani A, Kim SJ. Overlimiting Current in Nonuniform Arrays of Microchannels: Recirculating Flow and Anticrystallization. Nano Lett 2021; 21:5438-5446. [PMID: 33784095 DOI: 10.1021/acs.nanolett.0c05049] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Overlimiting current (OLC) through electrolytes interfaced with perm-selective membranes has been extensively researched for understanding fundamental nano-electrokinetics and developing efficient engineering applications. This work studies how a network of microchannels in a nonuniform array, which mimics a natural pore configuration, can contribute to OLC. Here, micro/nanofluidic devices are fabricated with arrays of parallel microchannels with nonuniform size distributions, which are faced with a perm-selective membrane. All cases maintain the same surface and bulk conduction to allow probing of the sensitivity only by the nonuniformity. Rigorous experimental and theoretical investigation demonstrates that overlimiting conductance has a maximum value depending on the nonuniformity. Furthermore, in operando visualization reveals that the nonuniform arrays induce flow loops across the microchannel network enhancing advective transport. This recirculating flow eliminates local salt accumulations so that it can effectively suppress undesirable salt crystallization. Therefore, these results can significantly advance not only the fundamental understanding of the driving mechanism of the OLC but also the design rule of electrochemical membrane applications.
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Affiliation(s)
- Hyekyung Lee
- Department of Electrical and Computer Engineering, Seoul National University, Seoul 08826, Republic of Korea
| | - Seoyun Sohn
- Department of Electrical and Computer Engineering, Seoul National University, Seoul 08826, Republic of Korea
| | - Shima Alizadeh
- Department of Mechanical Engineering, Stanford University, Stanford, California 94305, United States
| | - Soonhyun Kwon
- Department of Electrical and Computer Engineering, Seoul National University, Seoul 08826, Republic of Korea
| | - Tae Jin Kim
- Department of Radiation Oncology, Stanford University, Stanford, California 94305, United States
| | - Seung-Min Park
- Department of Radiology, Stanford University, Stanford, California 94305, United States
| | - Hyongsok Tom Soh
- Department of Radiology, Stanford University, Stanford, California 94305, United States
- Department of Electrical Engineering, Stanford University, Stanford, California 94305, United States
| | - Ali Mani
- Department of Mechanical Engineering, Stanford University, Stanford, California 94305, United States
| | - Sung Jae Kim
- Department of Electrical and Computer Engineering, Seoul National University, Seoul 08826, Republic of Korea
- Nano System Institute, Seoul National University, Seoul 08826, Republic of Korea
- Inter-university Semiconductor Research Center, Seoul National University, Seoul 08826, Republic of Korea
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Zamani M, Alizadeh S, Mollabashi M. Fertility-sparing uterine lesion resection in a woman with hemoperitoneum due to invasive mole: A rare case report. Int J Surg Case Rep 2021; 84:106117. [PMID: 34167070 PMCID: PMC8239455 DOI: 10.1016/j.ijscr.2021.106117] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2021] [Revised: 06/09/2021] [Accepted: 06/15/2021] [Indexed: 12/05/2022] Open
Abstract
Introduction Gestational trophoblastic neoplasia comprises a unique group of human neoplastic diseases that derive from fetal trophoblastic tissues. The hydatidiform mole is the most common form of GTD, representing 80 % of cases. An invasive mole is a hydatidiform mole characterized by the enlarged hydropic villi invading into the myometrium, into vascular spaces, or into extrauterine sites. Case presentation Here is a case with invasive mole after the evacuation of complete molar pregnancy, presented with an acute abdomen. We desired to preserve the uterine because our 21 years old patient doesn't have a child. Clinical discussion An emergency abdominal ultrasound scan showed a 47 ∗ 34 ∗ 55 mm ill-defined hyperechoic heterogeneous mass with anechoic cystic vascular spaces within it, in the posterior wall of the uterus away from the endometrium that extended to the serous layer of the uterus. Laparotomy was done. After the evacuation of 2 L of hemoperitoneum, an approximately 5 × 4 metastatic, vesicular mass was seen in the posterior wall of the uterus, which was resected and uterine preservation was successful. Conclusion This case report describes the clinical, imaging, surgical and histopathological findings of Invasive mole after a hydatidiform molar pregnancy. Our case highlights the feasibility of fertility-preserving surgery in the case who experienced life-threatening hemorrhage due to a ruptured uterus. An invasive mole rarely presents as hemoperitoneum. Ultrasound scan and color flow Doppler are particularly useful for diagnosis in GTN. Fertility-preserving surgery in life-threatening hemorrhage due to a ruptured uterus is challenging.
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Affiliation(s)
- Mehrangiz Zamani
- Department of Obstetrics & Gynecology, Hamadan University of Medical Science, Hamadan, Iran
| | - Shima Alizadeh
- Obstetrician & Gynecologist, Board Certified at Tehran University of Medical Science, Tehran, Iran
| | - Mina Mollabashi
- Department of Radiology, Hamadan University of Medical Science, Hamadan, Iran.
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Rokhgireh S, Gorginzadeh M, Mehdizadehkashi A, Tahermanesh K, Alizadeh S. Broad ligament pregnancy in the presence of an intrauterine contraceptive device: A case report. Int J Surg Case Rep 2021; 79:421-423. [PMID: 33529821 PMCID: PMC7851414 DOI: 10.1016/j.ijscr.2021.01.080] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [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: 01/01/2021] [Revised: 01/15/2021] [Accepted: 01/15/2021] [Indexed: 11/26/2022] Open
Abstract
INTRODUCTION Abdominal pregnancy though scarce is associated with considerable morbidity and mortality. Few cases till now have been diagnosed or managed by laparoscopy. CASE PRESENTATION In this study, a case of an abdominal pregnancy in a woman with intrauterine contraceptive device (IUD) in situ and a history of cesarean section is described. CLINICAL DISCUSSION Our case was a brief description of a broad ligament pregnancy as a subcategory of abdominal pregnancy .It was located medial to the pelvic sidewall, lateral to the uterus, inferior to the fallopian tube and superior to the pelvic floor. CONCLUSION The pregnancy was in the location of the left broad ligament which was diagnosed on laparoscopic evaluation.
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Affiliation(s)
- Samaneh Rokhgireh
- Endometriosis Research Center, Iran University of Medical Sciences (IUMS), Tehran, Iran
| | - Mansoureh Gorginzadeh
- Endometriosis Research Center, Iran University of Medical Sciences (IUMS), Tehran, Iran
| | | | - Kobra Tahermanesh
- Endometriosis Research Center, Iran University of Medical Sciences (IUMS), Tehran, Iran
| | - Shima Alizadeh
- Department of Obstetrics & Gynecology, Emam Complex, Vali-e-Asr Hospital, Tehran University of Medical Science(TUMS), Tehran, Iran.
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Alizadeh S, Bazant MZ, Mani A. Impact of network heterogeneity on electrokinetic transport in porous media. J Colloid Interface Sci 2019; 553:451-464. [DOI: 10.1016/j.jcis.2019.06.023] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2019] [Revised: 06/06/2019] [Accepted: 06/07/2019] [Indexed: 10/26/2022]
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Jalalian E, Hashemi E, Naser Mostufi SH, Banifatemeh AR, Shariati M, Pirmoazen A, Alizadeh S. Effect of Abutment Connection Type and Cyclic Loading on Removal Torque Value. J Res Dentomaxillofac Sci 2019. [DOI: 10.29252/jrdms.4.1.36] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/31/2022] Open
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Eftekhar T, Forooghifar T, Alizadeh S, Shabihkhani S, Forooghifar T, Hajhashemy M. Apical Prolapse Surgical Treatment Outcomes: Transabdominal Versus Transvaginal Approach. J Gynecol Surg 2018. [DOI: 10.1089/gyn.2017.0045] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Affiliation(s)
- Tahereh Eftekhar
- Department of Pelvic Floor, Tehran University of Medical Sciences, Tehran, Iran
| | - Tahereh Forooghifar
- Department of Pelvic Floor, Tehran University of Medical Sciences, Tehran, Iran
| | - Shima Alizadeh
- Department of Obstetrics and Gynecology, Tehran University of Medical Sciences, Tehran, Iran
| | - Sarah Shabihkhani
- Department of Obstetrics and Gynecology, Tehran University of Medical Sciences, Tehran, Iran
| | - Tayebeh Forooghifar
- Student of Marketing Management, Islamic Azad University of Rudehen, Tehran, Iran
| | - Maryam Hajhashemy
- Department of Obstetrics and Gynecology, Tehran University of Medical Sciences, Tehran, Iran
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Alizadeh S, Mani A. Multiscale Model for Electrokinetic Transport in Networks of Pores, Part II: Computational Algorithms and Applications. Langmuir 2017; 33:6220-6231. [PMID: 28509560 DOI: 10.1021/acs.langmuir.7b00591] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
The first part of this two-article series presented a robust mathematical model for the fast and accurate prediction of electrokinetic phenomena in porous networks with complex topologies. In the second part of this series, we first present a numerical algorithm that can efficiently solve the model equations. We then demonstrate that the resulting framework is capable of capturing a wide range of transport phenomena in microstructures by considering a hierarchy of canonical problems with increasing complexity. The developed framework is validated against direct numerical simulations of deionization shocks in micropore-membrane junctions and concentration polarization in micro- and nanochannel systems. We demonstrate that for thin pores subject to concentration gradients our model consistently captures correct induced osmotic pressure, which is a macroscopic phenomena originally derived from thermodynamic principles but here is naturally predicted through microscopic electrostatic interactions. Moreover, we show that the developed model captures current rectification phenomena in a conical nanopore subject to an axial external electric field. Finally, we provide discussions on examples involving stationary and moving deionization shocks in micropore nanopore T-junctions as well as induced-flow loops when pores of varying sizes are connected in parallel.
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Affiliation(s)
- Shima Alizadeh
- Department of Mechanical Engineering, Flow Physics and Computational Engineering, Stanford University , Stanford, California 94305, United States
- Center for Turbulence Research, Stanford University , Stanford, California 94305, United States
| | - Ali Mani
- Department of Mechanical Engineering, Flow Physics and Computational Engineering, Stanford University , Stanford, California 94305, United States
- Center for Turbulence Research, Stanford University , Stanford, California 94305, United States
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Abstract
We present an efficient and robust numerical model for the simulation of electrokinetic phenomena in porous media and microstructure networks considering a wide range of applications including energy conversion, deionization, and microfluidic-based lab-on-a-chip systems. Coupling between fluid flow and ion transport in these networks is governed by the Poisson-Nernst-Planck-Stokes equations. These equations describe a wide range of phenomena that can interact in a complex fashion when coupled in networks involving multiple pores with variable properties. Capturing these phenomena by direct simulation of the governing equations in multidimensions is prohibitively expensive. We present here a reduced-order model that treats a network of many pores via solutions to 1D equations. Assuming that each pore in the network is long and thin, we derive a 1D model describing the transport in the pore's longitudinal direction. We take into account the cross-sectional nonuniformity of potential and ion concentration fields in the form of area-averaged coefficients in different flux terms representing fluid flow, electric current, and ion fluxes. These coefficients are obtained from the solutions to the Poisson-Boltzmann equation and are tabulated against dimensionless surface charge and dimensionless thickness of the electric double layer (EDL). Although similar models have been attempted in the past, distinct advantages of the present framework include a fully conservative discretization with zero numerical leakage, fully bounded area-averaged coefficients without any singularity in the limit of infinitely thick EDLs, a flux discretization that exactly preserves equilibrium conditions, and extension to a general network of pores with multiple intersections. In part II of this two-article series, we present a numerical implementation of this model and demonstrate its applications in predicting a wide range of electrokinetic phenomena in microstructures.
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Affiliation(s)
- Shima Alizadeh
- Department of Mechanical Engineering, Flow Physics and Computational Engineering, Stanford University , Stanford, California 94305, United States
- Center for Turbulence Research, Stanford University , Stanford, California 94305, United States
| | - Ali Mani
- Department of Mechanical Engineering, Flow Physics and Computational Engineering, Stanford University , Stanford, California 94305, United States
- Center for Turbulence Research, Stanford University , Stanford, California 94305, United States
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Alizadeh M, Alizadeh S. Survey of clinical and pathological characteristics and outcomes of patients with prostate cancer. Glob J Health Sci 2014; 6:49-57. [PMID: 25363179 PMCID: PMC4796357 DOI: 10.5539/gjhs.v6n7p49] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2014] [Revised: 08/11/2014] [Accepted: 07/28/2014] [Indexed: 11/12/2022] Open
Abstract
INTRODUCTION The importance of implementation: Prostate cancer is the most common malignancy in men and the second leading cause of cancer death in developed countries. Therefore, further studies about the protests of disease, diagnosis and timely treatment are essential. STUDY METHOD In this study, 80 prostate cancer patients admitted to Imam Khomeini Hospital, Urmia in Iran from 2000 to 2008 were reviewed. Patients were studied according to their age, clinical protests, Gleason scoring, positive family history, smoking, type of treatment and post-treatment conditions. Questionnaires were adjusted based on the objectives and the data were extracted from the medical records of patients and the desired results were achieved. RESULTS In this study, the most common age group for prostate cancer is older than 60 years (92/5%). The most common type of pathology for prostate cancer is adenocarcinoma that 93.75% of cases are included. Secondary TCC with secondary source is present in 5% and sarcoma in 1.25% of cases. 46.25% of patients with prostate cancer are smokers. The most common clinical symptoms among patients are obstructive symptoms (56.25%), and irritation of the urinary tract (52.81%). Hematuria in 26.25% and urinary incontinence in 5% of cases have been recorded. 16.3% of patients referred with metastatic symptoms. Most patients with prostate cancer have Gleason score 5-7 (40%). All patients were undergoing prostatectomy (82.5% TURP and 17.5% SPP) and 47.5% of cases were bilateral orchiectomy. The cases reviewed, 22 were followed that included 27.5% of cases. Among them, 6 people have died due prostate cancer (27.27%) that the mean age of the patients after diagnosis until death was 34.4 months. 2 others died from other causes (9.09%). The remaining 14 cases were elder patients with a mean follow-up duration of 44 months. CONCLUSION According to the results obtained in the present study, the most common type of prostate cancer pathology is adenocarcinoma that is included 93.75% of cases. Prostate sarcoma is present at 1.25% and secondary bladder TCC at 5% of cases more over the incidence of prostate sarcoma is reported in a lower age group than adenocarcinoma, which the results obtained in a similar study in Iran in other centers. Regarding the relationship between smoking and prostate cancer it can be considered one of the important factors in this regard.
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Affiliation(s)
- M. Alizadeh
- Nephrology and kidney Transplant Research Center, Urmia University of Medical Sciences, Urmia, Iran
| | - S. Alizadeh
- Student medicines, Tehran University of Medical Sciences, Tehran, Iran
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Kazemi A, Nadri M, Dorgalaleh A, Alizadeh S, Tabibian S, Taregh B. C0105: Plasminogen Activator Inhibitor-1 Polymorphism is Not Associated with Central Nervous System Bleeding in Pediatric Patients with Factor XIII Deficiency. Thromb Res 2014. [DOI: 10.1016/s0049-3848(14)50253-8] [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: 10/25/2022]
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Naderi M, Dorgalaleh A, Alizadeh S, Kashani Khatib Z, Tabibian S, Kazemi A, Dargahi H, Bamedi T. Polymorphism of thrombin-activatable fibrinolysis inhibitor and risk of intracranial haemorrhage in factor XIII deficiency. Haemophilia 2013; 20:e89-92. [PMID: 24354489 DOI: 10.1111/hae.12287] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 09/22/2013] [Indexed: 11/30/2022]
Affiliation(s)
- M Naderi
- Ali Ebn-e Abitaleb Hospital Research Center for Adolescents Health, Zahedan University of Medical Sciences, Zahedan, Iran
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Ghorbanihaghjo A, Javadzadeh A, Bahreini E, Rashtchizadeh N, Argani H, Alizadeh S. 228 SERUM PARAOXONASE PHENOTYPE DISTRIBUTION IN EXUDATIVE AGE RELATED MACULAR DEGENERATION AND ITS RELATIONSHIP TO HOMOCYSTEINE AND OXIDIZED LOW DENSITY LIPOPROTEIN. ATHEROSCLEROSIS SUPP 2011. [DOI: 10.1016/s1567-5688(11)70229-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: 11/28/2022]
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Talebi H, Yazdi B, Alizadeh S, Moshiry E, Nourozi A, Eghtesadi-Araghi P. Effects of combination of intrathecal lidocaine and two doses of intrathecal midazolam on post-operative pain in patients undergoing herniorrhaphy: a randomized controlled trial. Pak J Biol Sci 2010; 13:1156-60. [PMID: 21313894 DOI: 10.3923/pjbs.2010.1156.1160] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Assessment of the effect of combination of intrathecal midazolam and lidocaine on postoperative pain was the aim of this study. This randomized controlled trial was performed during 2007 in a teaching hospital of Arak University of Medical Sciences. Forty five male patients who were candidates for elective inguinal herniorrhaphy entered the study and randomly divided into three groups of control (lidocaine 5% plus normal saline), M 0.5 (lidocaine 5% and midazolam 0.5 mg) and M 1.0 (lidocaine 5% and midazolam 1 mg) according intrathecal solution injected for spinal anesthesia. Mean arterial blood pressure, heart rate, post-operative pain, narcotic requirements and complications (nausea, vomiting, pruritic, headache, hypotension and bradycardia) were recorded. The severity of post-operative pain was lowest in M 1.0 group in all postoperative measurements except at 2 h after operation. With regard of complications, only there was significant difference in vomiting between three groups which had the highest frequency in M 0.5 group. No severe hypotension was seen; though, bradycardia occurred in one patient in M 0.5 group which needed treatment. Present findings suggest that administration of intrathecal midazolam (especially 1 mg) together with lidocaine is effective in reducing post-operative pain in patients undergoing open inguinal herniorrhaphy and is not associated with adverse effect.
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Affiliation(s)
- H Talebi
- Department of Anesthesiology, Arak University of Medical Sciences, Arak, Iran
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Soosaraie M, Alizadeh S, Fakhar M. PP-203 Taenia saginata infection: a rare case of intestinal perforation from Northern Iran. Int J Infect Dis 2010. [DOI: 10.1016/s1201-9712(10)60271-8] [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: 11/26/2022] Open
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Zamani F, Alizadeh S, Amiri A, Shakeri R, Robati M, Alimohamadi SM, Abdi H, Malekzadeh R. Psoriasis and coeliac disease; is there any relationship? Acta Derm Venereol 2010; 90:295-6. [PMID: 20526550 DOI: 10.2340/00015555-0829] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
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Alizadeh S, Nixon PJ, Telfer A, Barber J. Isolation and characterisation of the Photosystem two reaction centre complex from a double mutant of Chlamydomonas reinhardtii. Photosynth Res 1995; 43:165-171. [PMID: 24306750 DOI: 10.1007/bf00042974] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/08/1994] [Accepted: 01/30/1995] [Indexed: 06/02/2023]
Abstract
A rapid procedure has been developed for the isolation of the photosystem two reaction centre complex (PS II RC) from a double mutant of Chlamydomonas reinhardtii, F54-14, which lacks the Photosystem one complex and the chloroplast ATPase. Thylakoid membranes are solubilised with 1.5% (w/v) Triton X-100 and the PS II RC purified by anion-exchange chromatography using TSK DEAE-650(S) (Merck). The complex has a pigment stoichiometry of approximately six chlorophyll a: two pheophytin a: one cytochrome b-559: one to two β-carotene. It photoaccumulates reduced pheophytin and oxidised P680 in the presence of sodium dithionite and silicomolybdate, respectively. Immunoblotting experiments have confirmed the presence of the D1 and D2 polypeptides in this complex. The α-subunit of cytochrome b-559 was identified by N-terminal sequencing. Comparison of the complex with the PS II RC from pea using SDS-polyacrylamide gel electrophoresis showed that their polypeptide compositions were similar. However, the α-subunit of cytochrome b-559 from C. reinhardtii has a lower apparent molecular weight than the pea counterpart whereas the β-subunit is larger.
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Affiliation(s)
- S Alizadeh
- Photosynthesis Research Group, Centre for Photomolecular Sciences, Biochemistry Department, Wolfson Laboratories, Imperial College of Science, Technology & Medicine, SW7 2AY, London, UK
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Alizadeh S, Nechushtai R, Barber J, Nixon P. Nucleotide sequence of the psbE, psbF and trnM genes from the chloroplast genome of Chlamydomonas reinhardtii. Biochim Biophys Acta 1994; 1188:439-42. [PMID: 7803458 DOI: 10.1016/0005-2728(94)90067-1] [Citation(s) in RCA: 14] [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] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
We have determined the nucleotide sequences of the psbE and psbF genes, which encode the alpha and beta subunits, respectively, of cytochrome b-559, from the chloroplast genome of the green alga Chlamydomonas reinhardtii. In contrast to other organisms psbE is not co-transcribed with psbF. The primary structures of the gene products are very similar to the equivalent proteins in cyanobacteria and plants. Each subunit contains a single histidine residue that is thought to ligate haem. Upstream of the psbE gene, a trnM gene is located which encodes an elongator tRNA(Met) molecule.
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Affiliation(s)
- S Alizadeh
- Wolfson Laboratories, Department of Biochemistry, Imperial College of Science, Technology and Medicine, London, UK
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