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Ma S, Yang Q, Chen N, Zheng A, Abbasi N, Wang G, Patel PR, Cho BS, Yee BA, Zhang L, Chu H, Evans SM, Yeo GW, Zheng Y, Huang WJM. RNA binding protein DDX5 restricts RORγt + T reg suppressor function to promote intestine inflammation. Sci Adv 2023; 9:eadd6165. [PMID: 36724232 PMCID: PMC9891705 DOI: 10.1126/sciadv.add6165] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/22/2022] [Accepted: 01/05/2023] [Indexed: 06/18/2023]
Abstract
Retinoid-related orphan receptor (RAR) gamma (RORγt)-expressing regulatory T cells (RORγt+ Tregs) play pivotal roles in preventing T cell hyperactivation and maintaining tissue homeostasis, in part by secreting the anti-inflammation cytokine interleukin-10 (IL-10). Here, we report that hypoxia-induced factor 1α (HIF1α) is the master transcription factor for Il10 in RORγt+ Tregs. This critical anti-inflammatory pathway is negatively regulated by an RNA binding protein DEAD box helicase 5 (DDX5). As a transcriptional corepressor, DDX5 restricts the expression of HIF1α and its downstream target gene Il10 in RORγt+ Tregs. T cell-specific Ddx5 knockout (DDX5ΔT) mice have augmented RORγt+ Treg suppressor activities and are better protected from intestinal inflammation. Genetic ablation or pharmacologic inhibition of HIF1α restores enteropathy susceptibility in DDX5ΔT mice. The DDX5-HIF1α-IL-10 pathway is conserved in mice and humans. These findings reveal potential therapeutic targets for intestinal inflammatory diseases.
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Affiliation(s)
- Shengyun Ma
- Department of Cellular and Molecular Medicine, University of California San Diego, La Jolla, CA, USA
| | - Qiyuan Yang
- NOMIS Center for Immunobiology and Microbial Pathogenesis, Salk Institute for Biological Studies, La Jolla, CA, USA
| | - Nicholas Chen
- Department of Cellular and Molecular Medicine, University of California San Diego, La Jolla, CA, USA
| | - Anna Zheng
- Department of Cellular and Molecular Medicine, University of California San Diego, La Jolla, CA, USA
| | - Nazia Abbasi
- Department of Cellular and Molecular Medicine, University of California San Diego, La Jolla, CA, USA
| | - Gaowei Wang
- Department of Medicine, University of California San Diego, La Jolla, CA, USA
| | - Parth R. Patel
- Department of Cellular and Molecular Medicine, University of California San Diego, La Jolla, CA, USA
| | - Benjamin S. Cho
- Department of Cellular and Molecular Medicine, University of California San Diego, La Jolla, CA, USA
| | - Brian A. Yee
- Department of Cellular and Molecular Medicine, University of California San Diego, La Jolla, CA, USA
| | - Lunfeng Zhang
- Department of Pediatrics, Pediatric Diabetes Research Center, University of California San Diego, La Jolla, CA, USA
| | - Hiutung Chu
- Department of Pathology, University of California San Diego, La Jolla, CA, USA
- Chiba University–UC San Diego Center for Mucosal Immunology, Allergy, and Vaccines (cMAV), University of California San Diego, La Jolla, CA, USA
| | - Sylvia M. Evans
- Department of Pediatrics, Pediatric Diabetes Research Center, University of California San Diego, La Jolla, CA, USA
- Department of Pharmacology, University of California San Diego, La Jolla, CA, USA
- Skaggs School of Pharmacy and Pharmaceutical Sciences, University of California San Diego, La Jolla, CA, USA
| | - Gene W. Yeo
- Department of Cellular and Molecular Medicine, University of California San Diego, La Jolla, CA, USA
| | - Ye Zheng
- NOMIS Center for Immunobiology and Microbial Pathogenesis, Salk Institute for Biological Studies, La Jolla, CA, USA
| | - Wendy Jia Men Huang
- Department of Cellular and Molecular Medicine, University of California San Diego, La Jolla, CA, USA
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Long T, Abbasi N, Hernandez JE, Li Y, Sayed IM, Ma S, Iemolo A, Yee BA, Yeo GW, Telese F, Ghosh P, Das S, Huang WJM. RNA binding protein DDX5 directs tuft cell specification and function to regulate microbial repertoire and disease susceptibility in the intestine. Gut 2022; 71:1790-1802. [PMID: 34853057 PMCID: PMC9156727 DOI: 10.1136/gutjnl-2021-324984] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/22/2021] [Accepted: 11/12/2021] [Indexed: 12/30/2022]
Abstract
OBJECTIVE Tuft cells residing in the intestinal epithelium have diverse functions. In the small intestine, they provide protection against inflammation, combat against helminth and protist infections, and serve as entry portals for enteroviruses. In the colon, they had been implicated in tumourigenesis. Commitment of intestinal progenitor cells to the tuft cell lineage requires Rho GTPase Cell Division Cycle 42 (CDC42), a Rho GTPase that acts downstream of the epidermal growth factor receptor and wingless-related integration site signalling cascades, and the master transcription factor POU class 2 homeobox 3 (POU2F3). This study investigates how this pathway is regulated by the DEAD box containing RNA binding protein DDX5 in vivo. DESIGN We assessed the role of DDX5 in tuft cell specification and function in control and epithelial cell-specific Ddx5 knockout mice (DDX5ΔIEC) using transcriptomic approaches. RESULTS DDX5ΔIEC mice harboured a loss of intestinal tuft cell populations, modified microbial repertoire, and altered susceptibilities to ileal inflammation and colonic tumourigenesis. Mechanistically, DDX5 promotes CDC42 protein synthesis through a post-transcriptional mechanism to license tuft cell specification. Importantly, the DDX5-CDC42 axis is parallel but distinct from the known interleukin-13 circuit implicated in tuft cell hyperplasia, and both pathways augment Pou2f3 expression in secretory lineage progenitors. In mature tuft cells, DDX5 not only promotes integrin signalling and microbial responses, it also represses gene programmes involved in membrane transport and lipid metabolism. CONCLUSION RNA binding protein DDX5 directs tuft cell specification and function to regulate microbial repertoire and disease susceptibility in the intestine.
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Affiliation(s)
- Tianyun Long
- Department of Cellular and Molecular Medicine, University of California San Diego, La Jolla, California, USA
| | - Nazia Abbasi
- Department of Cellular and Molecular Medicine, University of California San Diego, La Jolla, California, USA
| | - Juan E Hernandez
- Department of Cellular and Molecular Medicine, University of California San Diego, La Jolla, California, USA
| | - Yuxin Li
- Department of Cellular and Molecular Medicine, University of California San Diego, La Jolla, California, USA
| | - Ibrahim M Sayed
- Department of Pathology, University of California San Diego, La Jolla, California, USA
| | - Shengyun Ma
- Department of Cellular and Molecular Medicine, University of California San Diego, La Jolla, California, USA
| | - Attilio Iemolo
- Department of Medicine, University of California, San Diego, La Jolla, California, USA
| | - Brian A Yee
- Department of Cellular and Molecular Medicine, University of California San Diego, La Jolla, California, USA
| | - Gene W Yeo
- Department of Cellular and Molecular Medicine, University of California San Diego, La Jolla, California, USA
| | - Francesca Telese
- Department of Medicine, University of California, San Diego, La Jolla, California, USA
| | - Pradipta Ghosh
- Department of Cellular and Molecular Medicine, University of California San Diego, La Jolla, California, USA
- Department of Medicine, University of California, San Diego, La Jolla, California, USA
| | - Soumita Das
- Department of Pathology, University of California San Diego, La Jolla, California, USA
| | - Wendy Jia Men Huang
- Department of Cellular and Molecular Medicine, University of California San Diego, La Jolla, California, USA
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Agrawal S, Al-Refai A, Abbasi N, Kulkarni AV, Pruthi V, Drake J, Ryan G, Van Mieghem T. Correlation of fetal ventricular size and need for postnatal cerebrospinal fluid diversion surgery in open spina bifida. Ultrasound Obstet Gynecol 2022; 59:799-803. [PMID: 34523765 DOI: 10.1002/uog.24767] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [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: 05/31/2021] [Revised: 08/23/2021] [Accepted: 08/31/2021] [Indexed: 06/13/2023]
Abstract
OBJECTIVES Open spina bifida is a common cause of hydrocephalus in the postnatal period. In-utero closure of the fetal spinal defect decreases the need for postnatal cerebrospinal fluid (CSF) diversion surgery. Good prenatal predictors of the need for postnatal CSF diversion surgery are currently lacking. In this study, we aimed to assess the association of fetal ventriculomegaly and its progression over the course of pregnancy with the rate of postnatal hydrocephalus requiring intervention. METHODS In this retrospective study, fetuses with a prenatal diagnosis of open spina bifida were assessed longitudinally. Ventricular diameter, as well as other potential predictors of the need for postnatal CSF diversion surgery, were compared between fetuses undergoing prenatal closure and those undergoing postnatal repair. RESULTS The diameter of the lateral ventricle increased significantly throughout gestation in both groups, but there was no difference in maximum ventricular diameter at first or last assessment between fetuses undergoing prenatal closure and those undergoing postnatal repair. There was no significant difference in the rate of progression of ventriculomegaly between the two groups, with a mean progression rate of 0.83 ± 0.5 mm/week in the prenatal-repair group and 0.6 ± 0.6 mm/week in the postnatal-repair group (P = 0.098). Fetal repair of open spina bifida was associated with a lower rate of postnatal CSF diversion surgery (P < 0.001). In all subjects, regardless of whether they had prenatal or postnatal surgery, the severity of ventriculomegaly at first and last assessments was associated independently with the need for postnatal CSF diversion surgery (P = 0.005 and P = 0.001, respectively), with a greater need for surgery in fetuses with larger ventricular size, even after controlling for gestational age at assessment. CONCLUSIONS In fetuses with open spina bifida, fetal ventricular size increases regardless of whether spina bifida closure is performed prenatally or postnatally, but the need for CSF diversion surgery is significantly lower in those undergoing prenatal repair. Ventriculomegaly is associated independently with the need for postnatal CSF diversion in fetuses with open spina bifida, irrespective of timing of closure. © 2021 International Society of Ultrasound in Obstetrics and Gynecology.
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Affiliation(s)
- S Agrawal
- Fetal Medicine Unit, Department of Obstetrics & Gynaecology, Mount Sinai Hospital and University of Toronto, Toronto, Canada
| | - A Al-Refai
- Fetal Medicine Unit, Department of Obstetrics & Gynaecology, Mount Sinai Hospital and University of Toronto, Toronto, Canada
- Maternal Fetal Medicine Division, Department of Obstetrics and Gynaecology, College of Medicine, King Saud bin Abdulaziz University for Health Sciences - Ministry of National Guard Health Affairs, Jeddah, Kingdom of Saudi Arabia
| | - N Abbasi
- Fetal Medicine Unit, Department of Obstetrics & Gynaecology, Mount Sinai Hospital and University of Toronto, Toronto, Canada
- Ontario Fetal Centre, Toronto, Canada
| | - A V Kulkarni
- Division of Neurosurgery, Hospital for Sick Children and University of Toronto, Toronto, Canada
- Ontario Fetal Centre, Toronto, Canada
| | - V Pruthi
- Fetal Medicine Unit, Department of Obstetrics & Gynaecology, Mount Sinai Hospital and University of Toronto, Toronto, Canada
| | - J Drake
- Division of Neurosurgery, Hospital for Sick Children and University of Toronto, Toronto, Canada
- Ontario Fetal Centre, Toronto, Canada
| | - G Ryan
- Fetal Medicine Unit, Department of Obstetrics & Gynaecology, Mount Sinai Hospital and University of Toronto, Toronto, Canada
- Ontario Fetal Centre, Toronto, Canada
| | - T Van Mieghem
- Fetal Medicine Unit, Department of Obstetrics & Gynaecology, Mount Sinai Hospital and University of Toronto, Toronto, Canada
- Ontario Fetal Centre, Toronto, Canada
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Ma S, Patel SA, Abe Y, Chen N, Patel PR, Cho BS, Abbasi N, Zeng S, Schnabl B, Chang JT, Huang WJM. RORγt phosphorylation protects against T cell-mediated inflammation. Cell Rep 2022; 38:110520. [PMID: 35294872 PMCID: PMC8982147 DOI: 10.1016/j.celrep.2022.110520] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [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: 05/14/2021] [Revised: 01/03/2022] [Accepted: 02/18/2022] [Indexed: 01/13/2023] Open
Abstract
RAR-related orphan receptor-γ (RORγt) is an essential transcription factor for thymic T cell development, secondary lymphoid tissue organogenesis, and peripheral immune cell differentiation. Serine 182 phosphorylation is a major post-translational modification (PTM) on RORγt. However, the in vivo contribution of this PTM in health and disease settings is unclear. We report that this PTM is not involved in thymic T cell development and effector T cell differentiation. Instead, it is a critical regulator of inflammation downstream of IL-1β signaling and extracellular signal regulated kinases (ERKs) activation. ERKs phosphorylation of serine 182 on RORgt serves to simultaneously restrict Th17 hyperactivation and promote anti-inflammatory cytokine IL-10 production in RORγt+ Treg cells. Phospho-null RORγtS182A knockin mice experience exacerbated inflammation in models of colitis and experimental autoimmune encephalomyelitis (EAE). In summary, the IL-1β-ERK-RORγtS182 circuit protects against T cell-mediated inflammation and provides potential therapeutic targets to combat autoimmune diseases. A balanced mucosal T cell population is essential for tissue homeostasis and wound healing post-injury and infection. In this study, Ma et al. report a surprising role for the phosphorylated transcription factor RORγt as a cell-intrinsic regulator for maintaining mucosal T cell heterogeneity and promoting inflammation resolution.
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Affiliation(s)
- Shengyun Ma
- Department of Cellular and Molecular Medicine, University of California, San Diego, 9500 Gilman Drive, La Jolla, CA 92093, USA
| | - Shefali A Patel
- Department of Medicine, University of California, San Diego, 9500 Gilman Drive, La Jolla, CA 92093, USA
| | - Yohei Abe
- Department of Cellular and Molecular Medicine, University of California, San Diego, 9500 Gilman Drive, La Jolla, CA 92093, USA
| | - Nicholas Chen
- Department of Cellular and Molecular Medicine, University of California, San Diego, 9500 Gilman Drive, La Jolla, CA 92093, USA
| | - Parth R Patel
- Department of Cellular and Molecular Medicine, University of California, San Diego, 9500 Gilman Drive, La Jolla, CA 92093, USA
| | - Benjamin S Cho
- Department of Cellular and Molecular Medicine, University of California, San Diego, 9500 Gilman Drive, La Jolla, CA 92093, USA
| | - Nazia Abbasi
- Department of Cellular and Molecular Medicine, University of California, San Diego, 9500 Gilman Drive, La Jolla, CA 92093, USA
| | - Suling Zeng
- Department of Medicine, University of California, San Diego, 9500 Gilman Drive, La Jolla, CA 92093, USA; Department of Medicine, Veterans Affairs San Diego Healthcare System, San Diego, CA 92161, USA
| | - Bernd Schnabl
- Department of Medicine, University of California, San Diego, 9500 Gilman Drive, La Jolla, CA 92093, USA; Department of Medicine, Veterans Affairs San Diego Healthcare System, San Diego, CA 92161, USA
| | - John T Chang
- Department of Medicine, University of California, San Diego, 9500 Gilman Drive, La Jolla, CA 92093, USA; Department of Medicine, Veterans Affairs San Diego Healthcare System, San Diego, CA 92161, USA
| | - Wendy Jia Men Huang
- Department of Cellular and Molecular Medicine, University of California, San Diego, 9500 Gilman Drive, La Jolla, CA 92093, USA.
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Kelly EN, Seaward G, Ye XY, Windrim R, Van Mieghem T, Keunen J, Abbasi N, Chitayat D, Ryan G. Short- and long-term outcome following thoracoamniotic shunting for fetal hydrothorax. Ultrasound Obstet Gynecol 2021; 57:624-630. [PMID: 32068931 DOI: 10.1002/uog.21994] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/10/2019] [Revised: 01/17/2020] [Accepted: 02/09/2020] [Indexed: 06/10/2023]
Abstract
OBJECTIVES To assess short- and long-term outcome in a cohort of fetuses diagnosed with hydrothorax (FHT) which underwent thoracoamniotic shunting in utero, and to examine the antenatal predictors of survival and of survival with normal neurodevelopmental outcome. METHODS This was a retrospective analysis of 132 fetuses that underwent thoracoamniotic shunting at our center between 1991 and 2014. Data were extracted from hospital obstetric and relevant neonatal intensive care and neonatal developmental follow-up databases. Outcomes included survival to discharge and survival with normal neurodevelopmental outcome beyond 18 months. Information on malformations, syndromes and genetic abnormalities were obtained from antenatal, postnatal and pediatric hospital records or by parent report. We compared pregnancy characteristics among those who survived vs non-survivors and among those with normal neurodevelopmental outcome vs those who were abnormal or died. We explored whether there was a trend in survival over the study period. RESULTS The mean gestational age at diagnosis of FHT was 25.6 weeks. The fetus was hydropic at diagnosis in 61% of cases, 69% had bilateral effusions and 55% had bilateral shunts inserted. Other diagnoses were present in 24% of cases, two-thirds of which were discovered only postnatally. There were 16 intrauterine and 30 neonatal deaths, with a 65% survival rate overall. The mean gestational age at delivery of liveborns was 35.4 (range, 26.9-41.6) weeks, and 88/116 (76%) were preterm (< 37 weeks). Of 87 liveborn at the treatment center, 75% experienced some respiratory and/or cardiovascular morbidity after birth, many with a lengthy hospital stay (mean, 36 (range, 1-249) days). Overall, 84% of survivors were developmentally normal beyond 18 months and outcomes were better when pleural effusions were isolated, 92% of these cases being neurodevelopmentally normal. There was no trend in survival or neurodevelopmental outcome over time. Despite the presence of FHT and neonatal respiratory issues, most (89%) of the 55 survivors with relevant follow-up had no long-term pulmonary complications. Gestational age at delivery was the only factor independently predictive of both survival and survival with normal neurodevelopmental outcome. CONCLUSIONS FHT is associated with other pathologies in a quarter of cases and carries a significant risk of prematurity, mortality and neonatal morbidity. The outcome is good in survivors but is best in isolated cases. Predictors of outcome at diagnosis are poor. Future improvement in diagnostics at time of identification of FHT may help to identify those that would benefit most from thoracoamniotic shunting. © 2020 International Society of Ultrasound in Obstetrics and Gynecology.
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Affiliation(s)
- E N Kelly
- Department of Paediatrics, Mount Sinai Hospital, University of Toronto, Toronto, Canada
| | - G Seaward
- Fetal Medicine Unit, Ontario Fetal Centre, Mount Sinai Hospital, University of Toronto, Toronto, Canada
| | - X Y Ye
- Micare Research Centre, Mount Sinai Hospital, University of Toronto, Toronto, Canada
| | - R Windrim
- Fetal Medicine Unit, Ontario Fetal Centre, Mount Sinai Hospital, University of Toronto, Toronto, Canada
| | - T Van Mieghem
- Fetal Medicine Unit, Ontario Fetal Centre, Mount Sinai Hospital, University of Toronto, Toronto, Canada
| | - J Keunen
- Fetal Medicine Unit, Ontario Fetal Centre, Mount Sinai Hospital, University of Toronto, Toronto, Canada
| | - N Abbasi
- Fetal Medicine Unit, Ontario Fetal Centre, Mount Sinai Hospital, University of Toronto, Toronto, Canada
| | - D Chitayat
- Prenatal Diagnosis and Medical Genetics Program, Mount Sinai Hospital, University of Toronto, Toronto, Canada
| | - G Ryan
- Fetal Medicine Unit, Ontario Fetal Centre, Mount Sinai Hospital, University of Toronto, Toronto, Canada
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Abbasi N, Long T, Li Y, Yee BA, Cho BS, Hernandez JE, Ma E, Patel PR, Sahoo D, Sayed IM, Varki N, Das S, Ghosh P, Yeo GW, Huang WJM. DDX5 promotes oncogene C3 and FABP1 expressions and drives intestinal inflammation and tumorigenesis. Life Sci Alliance 2020; 3:e202000772. [PMID: 32817263 PMCID: PMC7441524 DOI: 10.26508/lsa.202000772] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2020] [Revised: 08/07/2020] [Accepted: 08/07/2020] [Indexed: 12/12/2022] Open
Abstract
Tumorigenesis in different segments of the intestinal tract involves tissue-specific oncogenic drivers. In the colon, complement component 3 (C3) activation is a major contributor to inflammation and malignancies. By contrast, tumorigenesis in the small intestine involves fatty acid-binding protein 1 (FABP1). However, little is known of the upstream mechanisms driving their expressions in different segments of the intestinal tract. Here, we report that the RNA-binding protein DDX5 binds to the mRNA transcripts of C3 and Fabp1 to augment their expressions posttranscriptionally. Knocking out DDX5 in epithelial cells protected mice from intestinal tumorigenesis and dextran sodium sulfate (DSS)-induced colitis. Identification of DDX5 as a common upstream regulator of tissue-specific oncogenic molecules provides an excellent therapeutic target for intestinal diseases.
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Affiliation(s)
- Nazia Abbasi
- Department of Cellular and Molecular Medicine, University of California San Diego, La Jolla, CA, USA
| | - Tianyun Long
- Department of Cellular and Molecular Medicine, University of California San Diego, La Jolla, CA, USA
| | - Yuxin Li
- Department of Cellular and Molecular Medicine, University of California San Diego, La Jolla, CA, USA
| | - Brian A Yee
- Department of Cellular and Molecular Medicine, University of California San Diego, La Jolla, CA, USA
| | - Benjamin S Cho
- Department of Cellular and Molecular Medicine, University of California San Diego, La Jolla, CA, USA
| | - Juan E Hernandez
- Department of Cellular and Molecular Medicine, University of California San Diego, La Jolla, CA, USA
| | - Evelyn Ma
- Department of Cellular and Molecular Medicine, University of California San Diego, La Jolla, CA, USA
| | - Parth R Patel
- Department of Cellular and Molecular Medicine, University of California San Diego, La Jolla, CA, USA
| | - Debashis Sahoo
- Department of Pediatrics, University of California San Diego, La Jolla, CA, USA
| | - Ibrahim M Sayed
- Department of Pathology, University of California San Diego, La Jolla, CA, USA
| | - Nissi Varki
- Department of Pathology, University of California San Diego, La Jolla, CA, USA
| | - Soumita Das
- Department of Pathology, University of California San Diego, La Jolla, CA, USA
| | - Pradipta Ghosh
- Department of Cellular and Molecular Medicine, University of California San Diego, La Jolla, CA, USA
- Department of Medicine, University of California San Diego, La Jolla, CA, USA
| | - Gene W Yeo
- Department of Cellular and Molecular Medicine, University of California San Diego, La Jolla, CA, USA
| | - Wendy Jia Men Huang
- Department of Cellular and Molecular Medicine, University of California San Diego, La Jolla, CA, USA
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Dadashi M, Habibi RA, Alipour S, Ghoreishi SR, Abbasi N, Soltani-Kermanshahi M. Awareness and Observance Rate of the Patients' Rights Charter in General Hospitals; The Perspectives of Iranian Patients. Hosp Top 2019; 97:66-72. [PMID: 31058586 DOI: 10.1080/00185868.2019.1608884] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Abstract
One of the most important indicators for assessing the quality of healthcare is the evaluation of patients' rights status and the interaction between patients and the healthcare providers. The patient rights charter improves communication between patients and service providers and enhances the quality of healthcare. This is a descriptive-analytic study that was performed on 500 patients referred to 25 general hospitals supervised by Tehran University of Medical Sciences. In this study, the observance rate of the patient rights charter was considered and the patient rights charter in the samples were studied based on dependency type of hospitals. The patients' opinions showed that the observance rate of the patient rights charter in the hospitals was 60.7%. Observance rate of patients' rights charter according to the dependency type of hospitals (governmental - private - public - charity) in all clauses of the patient rights charter was statistically significant (p = 0.000). The findings of this study indicate that the majority of clauses in the patients' rights charter is observed in hospitals. In the field of observing of the patient rights charter, increasing patient's awareness about their rights is a priority. And in the next step, comprehensive and assured laws are needed to observe patients' rights in healthcare centers.
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Affiliation(s)
- M Dadashi
- a Department of Treatment Supervision, Treatment Deputy , Tehran University of Medical Sciences , Tehran , Iran
| | - R Andarz Habibi
- a Department of Treatment Supervision, Treatment Deputy , Tehran University of Medical Sciences , Tehran , Iran
| | - S Alipour
- b Department of Surgery, Women's Comprehensive Arash Hospital , Tehran University of Medical Sciences , Tehran , Iran
| | - S R Ghoreishi
- a Department of Treatment Supervision, Treatment Deputy , Tehran University of Medical Sciences , Tehran , Iran
| | - N Abbasi
- a Department of Treatment Supervision, Treatment Deputy , Tehran University of Medical Sciences , Tehran , Iran
| | - M Soltani-Kermanshahi
- c Social Determinants of Health Research, School of Medicine , Semnan University of Medical Sciences , Semnan , Iran
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Ma S, Zhou B, Abbasi N, Luo C, Yeo GW, Fu X, Huang WJM. DDX5 regulates chromatin lncRNAs to direct T cell programs. The Journal of Immunology 2019. [DOI: 10.4049/jimmunol.202.supp.125.20] [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: 01/03/2023]
Abstract
Abstract
Recent studies uncovered the growing role of long non-coding RNAs (lncRNAs) in T cell biology. However, little is known about the lncRNAs that localize on the T cell chromatin (T-chrRNAs) with critical roles in gene expressions at the transcription and post-transcriptional level. Using the GRID-seq approach, we uncovered the top 18 T-chrRNAs and their chromatin occupancy in primary mouse CD4+ T helper cells in both the naïve and differentiated states. The chromatin binding of these T-chrRNAs revealed surprising stage-specific clustering patterns and mobilization during development and T cell differentiation. Our eCLIP assay showed that many of these T-chrRNAs interact directly with the DDX5, a nuclear residing RNA binding protein with ATPase activity.
Th17 are unique CD4+ T-cell subset characterized by production of IL-17 and play an important role in inflammation and autoimmunity. At low TGFβ concentration, DDX5 is required for proper Th17 cytokine expression. Our ATAC-seq results suggest that DDX5 knockout Th17 cells fail to maintain chromatin accessibility at numerous regulatory regions, including the super-enhancer at the Il17a-Il17f locus. Moreover, GRID-seq data on WT and DDX5 knockout Th17 cells identified a subset of T-chrRNAs dependent on DDX5 for their proper chromatin localization. In particular, Malat1 is recruited to key Th17 loci in a DDX5 dependent manner. Similar to the DDX5-knockout Th17 cells, CRISPR-Cas targeting of the DDX5 bound regions of Malat1 results in loss of Th17 effector function. Better understanding of the localizations, functions, and upstream regulatory mechanisms governing T-chrRNAs physiology will provide new opportunities for therapeutic intervention to treating T cell mediated diseases.
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Affiliation(s)
- Shengyun Ma
- 1Department of Cellular and Molecular Medicine, School of Medicine, UCSD
| | - Bing Zhou
- 2State Key Laboratory of Stem Cell and Reproductive Biology, Institute of Zoology, Chinese Academy of Sciences, China
| | - Nazia Abbasi
- 1Department of Cellular and Molecular Medicine, School of Medicine, UCSD
| | - Claire Luo
- 1Department of Cellular and Molecular Medicine, School of Medicine, UCSD
| | - Gene W. Yeo
- 1Department of Cellular and Molecular Medicine, School of Medicine, UCSD
| | - Xiangdong Fu
- 1Department of Cellular and Molecular Medicine, School of Medicine, UCSD
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Hauser F, Ceciliato PHO, Lin YC, Guo D, Gregerson JD, Abbasi N, Youhanna D, Park J, Dubeaux G, Shani E, Poomchongkho N, Schroeder JI. A seed resource for screening functionally redundant genes and isolation of new mutants impaired in CO2 and ABA responses. J Exp Bot 2019; 70:641-651. [PMID: 30346611 PMCID: PMC6322574 DOI: 10.1093/jxb/ery363] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/10/2018] [Accepted: 10/12/2018] [Indexed: 05/24/2023]
Abstract
The identification of homologous genes with functional overlap in forward genetic screens is severely limited. Here, we report the generation of over 14000 artificial microRNA (amiRNA)-expressing plants that enable screens of the functionally redundant gene space in Arabidopsis. A protocol was developed for isolating robust and reproducible amiRNA mutants. Examples of validation approaches and essential controls are presented for two new amiRNA mutants that exhibit genetically redundant phenotypes and circumvent double mutant lethality. In a forward genetic screen for abscisic acid (ABA)-mediated inhibition of seed germination, amiRNAs that target combinations of known redundant ABA receptor and SnRK2 kinase genes were rapidly isolated, providing a strong proof of principle for this approach. A new ABA-insensitive amiRNA line that targets three avirulence-induced gene 2(-like) genes was isolated . A thermal imaging screen for plants with impaired stomatal opening in response to low CO2 exposure led to the isolation of a new amiRNA targeting two essential proteasomal subunits, PAB1 and PAB2. The seed library of 11000 T2 amiRNA lines (with 3000 lines in progress) generated here provides a new platform for forward genetic screens and has been made available to the Arabidopsis Biological Resource Center (ABRC). Optimized procedures for amiRNA screening and controls are described.
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Affiliation(s)
- Felix Hauser
- Division of Biological Sciences, Cell and Developmental Biology Section, University of California San Diego, La Jolla, CA, USA
| | - Paulo H O Ceciliato
- Division of Biological Sciences, Cell and Developmental Biology Section, University of California San Diego, La Jolla, CA, USA
| | - Yi-Chen Lin
- Division of Biological Sciences, Cell and Developmental Biology Section, University of California San Diego, La Jolla, CA, USA
| | - DanDan Guo
- Division of Biological Sciences, Cell and Developmental Biology Section, University of California San Diego, La Jolla, CA, USA
- College of Pharmacy, Second Military Medical University, Shanghai, China
| | - J D Gregerson
- Division of Biological Sciences, Cell and Developmental Biology Section, University of California San Diego, La Jolla, CA, USA
| | - Nazia Abbasi
- Division of Biological Sciences, Cell and Developmental Biology Section, University of California San Diego, La Jolla, CA, USA
| | - Diana Youhanna
- Division of Biological Sciences, Cell and Developmental Biology Section, University of California San Diego, La Jolla, CA, USA
| | - Jiyoung Park
- Division of Biological Sciences, Cell and Developmental Biology Section, University of California San Diego, La Jolla, CA, USA
| | - Guillaume Dubeaux
- Division of Biological Sciences, Cell and Developmental Biology Section, University of California San Diego, La Jolla, CA, USA
| | - Eilon Shani
- School of Plant Sciences and Food Security, Tel Aviv University, Ramat Aviv, Israel
| | - Nusra Poomchongkho
- Division of Biological Sciences, Cell and Developmental Biology Section, University of California San Diego, La Jolla, CA, USA
| | - Julian I Schroeder
- Division of Biological Sciences, Cell and Developmental Biology Section, University of California San Diego, La Jolla, CA, USA
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Shanmugam T, Abbasi N, Kim HS, Kim HB, Park NI, Park GT, Oh SA, Park SK, Muench DG, Choi Y, Park YI, Choi SB. An Arabidopsis divergent pumilio protein, APUM24, is essential for embryogenesis and required for faithful pre-rRNA processing. Plant J 2017; 92:1092-1105. [PMID: 29031033 DOI: 10.1111/tpj.13745] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [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: 12/15/2016] [Revised: 09/28/2017] [Accepted: 10/03/2017] [Indexed: 05/06/2023]
Abstract
Pumilio RNA-binding proteins are largely involved in mRNA degradation and translation repression. However, a few evolutionarily divergent Pumilios are also responsible for proper pre-rRNA processing in human and yeast. Here, we describe an essential Arabidopsis nucleolar Pumilio, APUM24, that is expressed in tissues undergoing rapid proliferation and cell division. A T-DNA insertion for APUM24 did not affect the male and female gametogenesis, but instead resulted in a negative female gametophytic effect on zygotic cell division immediately after fertilization. Additionally, the mutant embryos displayed defects in cell patterning from pro-embryo through globular stages. The mutant embryos were marked by altered auxin maxima, which were substantiated by the mislocalization of PIN1 and PIN7 transporters in the defective embryos. Homozygous apum24 callus accumulates rRNA processing intermediates, including uridylated and adenylated 5.8S and 25S rRNA precursors. An RNA-protein interaction assay showed that the histidine-tagged recombinant APUM24 binds RNAin vitro with no apparent specificity. Overall, our results demonstrated that APUM24 is required for rRNA processing and early embryogenesis in Arabidopsis.
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Affiliation(s)
- Thiruvenkadam Shanmugam
- Division of Bioscience and Bioinformatics, Myongji University, Yongin, Kyunggi-do, 449-728, South Korea
| | - Nazia Abbasi
- Division of Bioscience and Bioinformatics, Myongji University, Yongin, Kyunggi-do, 449-728, South Korea
| | - Hyung-Sae Kim
- Division of Bioscience and Bioinformatics, Myongji University, Yongin, Kyunggi-do, 449-728, South Korea
| | - Ho Bang Kim
- Division of Bioscience and Bioinformatics, Myongji University, Yongin, Kyunggi-do, 449-728, South Korea
| | - Nam-Il Park
- Division of Bioscience and Bioinformatics, Myongji University, Yongin, Kyunggi-do, 449-728, South Korea
| | - Guen Tae Park
- School of Biological Sciences, Seoul National University, Seoul, 151-747, South Korea
| | - Sung Aeong Oh
- School of Applied Biosciences, Kyungpook National University, Daegu, 702-701, South Korea
| | - Soon Ki Park
- School of Applied Biosciences, Kyungpook National University, Daegu, 702-701, South Korea
| | - Douglas G Muench
- Department of Biological Sciences, University of Calgary, Calgary, AB, T2N 1N4, Canada
| | - Yeonhee Choi
- School of Biological Sciences, Seoul National University, Seoul, 151-747, South Korea
| | - Youn-Il Park
- Department of Biological Sciences, Chungnam National University, Daejeon, 305-764, South Korea
| | - Sang-Bong Choi
- Division of Bioscience and Bioinformatics, Myongji University, Yongin, Kyunggi-do, 449-728, South Korea
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11
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Abbasi N, Johnson JA, Ryan G. Fetal anemia. Ultrasound Obstet Gynecol 2017; 50:145-153. [PMID: 28782230 DOI: 10.1002/uog.17555] [Citation(s) in RCA: 31] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/27/2017] [Revised: 06/13/2017] [Accepted: 06/16/2017] [Indexed: 06/07/2023]
Affiliation(s)
- N Abbasi
- Fetal Medicine Unit, Department of Obstetrics and Gynaecology, Mount Sinai Hospital, Toronto, Ontario, Canada
| | - J-A Johnson
- Department of Obstetrics and Gynaecology, University of Calgary, Calgary, Alberta, Canada
| | - G Ryan
- Fetal Medicine Unit, Department of Obstetrics and Gynaecology, Mount Sinai Hospital, Toronto, Ontario, Canada
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12
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Abbasi N, Mohammadpour S, Karimi E, Aidy A, Karimi P, Azizi M, Asadollahi K. Protective effects of Smyrnium cordifolium boiss essential oil on pentylenetetrazol-induced seizures in mice: involvement of benzodiazepine and opioid antagonists. J BIOL REG HOMEOS AG 2017; 31:683-689. [PMID: 28956418] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Smyrnium cordifolium as a wild plant is used in traditional medicine in Iran for the treatment of anxiety and insomnia. The anticonvulsant effect of this plant has not been studied to date, therefore this study aimed to evaluate the anticonvulsant effects of its essential oil and curzerene on seizure. Essential oil of the Smyrnium cordifolium plant was prepared by the hydro-distillation method. Gas chromatography and gas chromatography-mass spectroscopy analysis of the essential oil revealed its main components. Anticonvulsant effects of Smyrnium cordifolium essential oil (SCEO) and curzerene were examined on mice using the pentylentetrazole model (PTZ). Flumazenil (2 mg/kg, i.p) and naloxone (5 mg/kg, i.p) were injected into the relevant groups of mice to realize the anticonvulsant mechanism of SCEO and curzerene, respectively. The main identified components of the plant were curzerene (65.26%), δ-Cadinene (14.39%) and γ-elemene (5.15%), which comprised approximately 85.28% of SCEO. The ED50 values of SCEO and curzerene in the PTZ model were 223±15 and 0.25±0.09 mg/kg, respectively. Curzerene at the dosage of 0.4 mg/kg prolonged the onset time of seizure and decreased the duration of seizure among treated group compared to the saline group. At the dosage of 0.4 mg/kg, seizure and mortality protection rates for the treated group were 100%. Flumazenil and naloxone could suppress the anticonvulsant effects of SCEO and curzerene. It seems that SCEO and curzerene are useful for the treatment of absence seizure and this effect may be related to their effects on GABAergic and opioid systems.
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Affiliation(s)
- N Abbasi
- Biotechnology and Medicinal Plants Research Center, Faculty of Medicine, Ilam University of Medical Sciences, Ilam, Iran
- Department of pharmacology, Faculty of Medicine, Ilam University of Medical Sciences, Ilam, Iran
| | - S Mohammadpour
- Biotechnology and Medicinal Plants Research Center, Faculty of Medicine, Ilam University of Medical Sciences, Ilam, Iran
- Department of Anatomy, Faculty of Medicine, Iran University of Medical Sciences, Tehran, Iran
| | - E Karimi
- Biotechnology and Medicinal Plants Research Center, Faculty of Medicine, Ilam University of Medical Sciences, Ilam, Iran
| | - A Aidy
- Biotechnology and Medicinal Plants Research Center, Faculty of Medicine, Ilam University of Medical Sciences, Ilam, Iran
| | - P Karimi
- Department of Pediatrics, Faculty of Medicine, Ilam University of Medical Sciences, Ilam, Iran
| | - M Azizi
- Department of Anatomy, Faculty of Medicine, Ilam University of Medical Sciences, Ilam, Iran
| | - K Asadollahi
- Biotechnology and Medicinal Plants Research Center, Faculty of Medicine, Ilam University of Medical Sciences, Ilam, Iran
- Department of Social Medicine, Faculty of Medicine, Ilam University of Medical Sciences, Ilam, Iran
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Abbasi N, Nazari Sabooki L. Comparision of the estimation of the least square and genetic algorithm throuth serval function in R. J Fundam and Appl Sci 2016. [DOI: 10.4314/jfas.8vi2s.88] [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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Abstract
Dabetic retinopatny Is the most common microvascular complication of diabetes and a leading cause of blindness in industrialized countries. Oxidative stress plays an important role in the development of microangiopathic complications in diabetes. Manganese superoxide dismutase (MnSOD) is a key mitochondrial antioxidant enzyme in the cellular defense against agents that induce oxidative stress. The aim of the present study was to assess whether the MnSODA16V (C47T) polymorphism is associated with Diabetic retinopathy in northern Iran. 140 patients with Diabetic retinopathy and 140 healthy individuals, aged 30 to 75 years old, participated in this study. For genotyping of the MnSOD A16V polymorphism, polymerase chain reaction-restriction fragment length polymorphism (PCR-RFLP) method was used. The prevalence of genotype frequencies of AA, AV, VW in Diabetic retinopathy subject were 5.71, 71.43 and 22.86%, respectively while in controls were 21.43, 38.57 and 40%, respectively. Significantly increased frequency of AV genotype was observed in patients compared with controls (OR = 6.94, 95% CI = 2.98-16.20, P< 0.0001). In conclusion, it is suggested that the MnSOD A16V polymorphism may be associated with the risk of Diabetic retinopathy in northern Iran. However, larger population-based studies are needed for clarifying the relation between Diabetic retinopathy and MnSOD A16V polymorphism.
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Haghighi SF, Salehi Z, Sabouri MR, Abbasi N, Haghighi SF, Salehi Z, Sabouri MR, Abbasi N. Polymorphic variant of MnSOD A16V and risk of diabetic retinopathy. Mol Biol 2015. [DOI: 10.1134/s0026893315010057] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Abbasi N, Patenaude V, Abenhaim HA. Management and outcomes of acute appendicitis in pregnancy-population-based study of over 7000 cases. BJOG 2014; 121:1509-14. [PMID: 24674238 DOI: 10.1111/1471-0528.12736] [Citation(s) in RCA: 67] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 01/28/2014] [Indexed: 01/07/2023]
Affiliation(s)
- N Abbasi
- Department of Obstetrics and Gynaecology; Jewish General Hospital; Montreal QC Canada
| | - V Patenaude
- Centre for Clinical Epidemiology and Community Studies; Jewish General Hospital; Montreal QC Canada
| | - HA Abenhaim
- Department of Obstetrics and Gynaecology; Jewish General Hospital; Montreal QC Canada
- Centre for Clinical Epidemiology and Community Studies; Jewish General Hospital; Montreal QC Canada
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Kim HS, Abbasi N, Choi SB. Bruno-like proteins modulate flowering time via 3' UTR-dependent decay of SOC1 mRNA. New Phytol 2013; 198:747-756. [PMID: 23437850 DOI: 10.1111/nph.12181] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/17/2012] [Accepted: 01/06/2013] [Indexed: 05/22/2023]
Abstract
The Bruno RNA-binding protein (RBP) has been shown to initially repress the translation of oskar mRNA during Drosophila oogenesis and later to be involved in a broad range of RNA regulation. Here, we show that homologous constitutive overexpression of each of two Arabidopsis thaliana Bruno-like genes, AtBRN1 and AtBRN2, delayed the flowering time, while the atbrn1 atbrn2-3 double mutant flowered early and exhibited increased expression of APETALA1 (AP1) and LEAFY (LFY) transcripts. Crossing of 35S::AtBRNs with SOC1 101-D plants demonstrated that 35S::AtBRNs suppress an early-flowering phenotype of SOC1 101-D in which the coding sequence (CDS) with the 3' UTR of SUPPRESSOR OF OVEREXPRESSION OF CONSTANS1 (SOC1) gene is overexpressed. However, this early-flowering phenotype by SOC1 overexpression was maintained in the plants coexpressing 35S::AtBRNs and 35S::SOC1 without the 3' UTR (-3' UTR). Using yeast three-hybrid, electrophoretic mobility shift, RNA immunoprecipitation, and protoplast transient assays, we found that AtBRNs bind to the 3' UTR of SOC1 RNA and participate in mRNA decay, which was mediated by the distal region of the SOC1 3' UTR. Overall, AtBRNs repress SOC1 activity in a 3' UTR-dependent manner, thereby controlling the flowering time in Arabidopsis.
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Affiliation(s)
- Hyung-Sae Kim
- Division of Bioscience and Bioinformatics, Myongji University, Yongin, Kyunggi-do, 449-728, South Korea
| | - Nazia Abbasi
- School of Biotechnology and Environmental Engineering, Myongji University, Yongin, Kyunggi-do, 449-728, South Korea
| | - Sang-Bong Choi
- Division of Bioscience and Bioinformatics, Myongji University, Yongin, Kyunggi-do, 449-728, South Korea
- School of Biotechnology and Environmental Engineering, Myongji University, Yongin, Kyunggi-do, 449-728, South Korea
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20
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Carhart-Harris RL, Leech R, Williams TM, Erritzoe D, Abbasi N, Bargiotas T, Hobden P, Sharp DJ, Evans J, Feilding A, Wise RG, Nutt DJ. Implications for psychedelic-assisted psychotherapy: functional magnetic resonance imaging study with psilocybin. Br J Psychiatry 2012; 200:238-44. [PMID: 22282432 DOI: 10.1192/bjp.bp.111.103309] [Citation(s) in RCA: 131] [Impact Index Per Article: 10.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
BACKGROUND Psilocybin is a classic psychedelic drug that has a history of use in psychotherapy. One of the rationales for its use was that it aids emotional insight by lowering psychological defences. AIMS To test the hypothesis that psilocybin facilitates access to personal memories and emotions by comparing subjective and neural responses to positive autobiographical memories under psilocybin and placebo. METHOD Ten healthy participants received two functional magnetic resonance imaging scans (2 mg intravenous psilocybin v. intravenous saline), separated by approximately 7 days, during which they viewed two different sets of 15 positive autobiographical memory cues. Participants viewed each cue for 6 s and then closed their eyes for 16 s and imagined re-experiencing the event. Activations during this recollection period were compared with an equivalent period of eyes-closed rest. We split the recollection period into an early phase (first 8 s) and a late phase (last 8 s) for analysis. RESULTS Robust activations to the memories were seen in limbic and striatal regions in the early phase and the medial prefrontal cortex in the late phase in both conditions (P<0.001, whole brain cluster correction), but there were additional visual and other sensory cortical activations in the late phase under psilocybin that were absent under placebo. Ratings of memory vividness and visual imagery were significantly higher after psilocybin (P<0.05) and there was a significant positive correlation between vividness and subjective well-being at follow-up (P<0.01). CONCLUSIONS Evidence that psilocybin enhances autobiographical recollection implies that it may be useful in psychotherapy either as a tool to facilitate the recall of salient memories or to reverse negative cognitive biases.
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Affiliation(s)
- R L Carhart-Harris
- Imperial College London, Neuropsychopharmacology Unit, 5th Floor, Burlington Danes Building, 160 Du Cane Road, London W12 0NN, UK.
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Abstract
Pumilio proteins are a class of RNA-binding proteins harboring Puf domains (or PUM-HD; Pumilio-Homology Domain), named after the founding members, Pumilio (from Drosophila melanogaster) and FBF (Fem-3 mRNA-Binding Factor from Caenorhabditis elegans). The domains contain multiple tandem repeats each of which recognizes one RNA base and is comprised of 35-39 amino acids. Puf domain proteins have been reported in organisms ranging from single-celled yeast to higher multicellular eukaryotes, such as humans and plants. In yeast and animals, they are involved in a variety of posttranscriptional RNA metabolism including RNA decay, RNA transport, rRNA processing and translational repression. However, their roles in plants are largely unknown. Recently, we have characterized the first member of the Puf family of RNA-binding proteins, APUM23, in Arabidopsis. Here, we discuss and summarize the diverse roles and targets of Puf proteins previously reported in other organisms and then highlight the potential regulatory roles of Puf proteins in Arabidopsis, using our recent study as an example.
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Affiliation(s)
- Nazia Abbasi
- School of Biotechnology and Environmental Engineering; Myongji University; Yongin
| | - Youn-Il Park
- Department of Biological Sciences and Graduate School of Analytical Science and Technology; Chungnam National University; Youseong, South Korea
| | - Sang-Bong Choi
- School of Biotechnology and Environmental Engineering; Myongji University; Yongin
- Division of Bioscience and Bioinformatics; Myongji University; Yongin
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Abbasi N, Kim HB, Park NI, Kim HS, Kim YK, Park YI, Choi SB. APUM23, a nucleolar Puf domain protein, is involved in pre-ribosomal RNA processing and normal growth patterning in Arabidopsis. Plant J 2010; 64:960-76. [PMID: 21143677 DOI: 10.1111/j.1365-313x.2010.04393.x] [Citation(s) in RCA: 40] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/05/2023]
Abstract
Pumilio, an RNA-binding protein that contains tandemly repeated Puf domains, is known to repress translational activity in early embryogenesis and polarized cells of non-plant species. Although Pumilio proteins have been characterized in many eukaryotes, their role in plants is unknown. In the present study, we characterized an Arabidopsis Pumilio-encoding gene, APUM23. APUM23 is constitutively expressed, with higher levels in metabolically active tissues, and its expression is up-regulated in the presence of either glucose or sucrose. The T-DNA insertion mutants apum23-1 and apum23-2 showed slow growth, with serrated and scrunched leaves, an abnormal venation pattern, and distorted organization of the palisade parenchyma cells - a phenotype that is reminiscent of nucleolin and ribosomal protein gene mutants. Intracellular localization studies indicate that APUM23 predominantly localizes to the nucleolus. Based on this localization, rRNA processing was examined. In apum23, 35S pre-rRNA, and unprocessed 18S and 5.8S poly(A) rRNAs, accumulated without affecting the steady-state levels of mature rRNAs, indicating that APUM23 is involved in the processing and/or degradation of 35S pre-rRNA and rRNA maturation by-products. The apum23 mutant showed increased levels of 18S rRNA biogenesis-related U3 and U14 small nucleolar RNAs (snoRNAs) and accumulated RNAs within the nucleolus. Our data suggest that APUM23 plays an important role in plant development via rRNA processing.
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Affiliation(s)
- Nazia Abbasi
- School of Biotechnology and Environmental Engineering, Myongji University, Yongin, Kyunggi-do 449-728, South Korea
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Kim HS, Kim SJ, Abbasi N, Bressan RA, Yun DJ, Yoo SD, Kwon SY, Choi SB. The DOF transcription factor Dof5.1 influences leaf axial patterning by promoting Revoluta transcription in Arabidopsis. Plant J 2010; 64:524-35. [PMID: 20807212 DOI: 10.1111/j.1365-313x.2010.04346.x] [Citation(s) in RCA: 44] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/05/2023]
Abstract
Dof proteins are transcription factors that have a conserved single zinc finger DNA-binding domain. In this study, we isolated an activation tagging mutant Dof5.1-D exhibiting an upward-curling leaf phenotype due to enhanced expression of the REV gene that is required for establishing adaxial-abaxial polarity. Dof5.1-D plants also had reduced transcript levels for IAA6 and IAA19 genes, indicating an altered auxin biosynthesis in Dof5.1-D. An electrophoretic mobility shift assay using the Dof5.1 DNA-binding motif and the REV promoter region indicated that the DNA-binding domain of Dof5.1 binds to a TAAAGT motif located in the 5'-distal promoter region of the REV promoter. Further, transient and chromatin immunoprecipitation assays verified binding activity of the Dof5.1 DNA-binding motif with the REV promoter. Consistent with binding assays, constitutive over-expression of the Dof5.1 DNA-binding domain in wild-type plants caused a downward-curling phenotype, whereas crossing Dof5.1-D to a rev mutant reverted the upward-curling phenotype of the Dof5.1-D mutant leaf to the wild-type. These results suggest that the Dof5.1 protein directly binds to the REV promoter and thereby regulates adaxial-abaxial polarity.
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Affiliation(s)
- Hyung-Sae Kim
- Division of Bioscience and Bioinformatics, Myongji University, Yongin, Kyunggi-do 449-728, South Korea
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Yazdani R, Abhishek A, Fiona P, Lim K, Regan M, Lanyon P, Khan K, Hoyles RK, Shiwen X, Derrett-Smith E, Abraham D, Denton CP, Ottewell L, Walker K, Griffiths B, Ali Nazarinia M, Abbasi N, Karimi A, Amiri A, Derrett-Smith EC, Baliga R, Dooley A, Khan K, Shi-Wen X, Abraham D, Denton CP, Stretton K, Shukla S, Hall F, Nandagudi A, Kingsley G, Scott D, Stratton R, Nandagudi A, Shiwen X, Leask A, Denton CP, Abraham D, Stratton R, Denton CP, Guillevin L, Krieg T, Schwierin B, Rosenberg D, Silkey M, Matucci-Cerinic M, Jones H, Derrett-Smith E, Shiwen X, Khan K, Denton CP, Abraham D, Bou-Gharios G, So P, Shiwen X, Renzoni E, Denton C, Wells A, Abraham D. Scleroderma and Related Disorders [202-212]: 202. Multi-Centre Audit of Treatment of Interstitial Lung Disease in Systemic Sclerosis with IV Cyclophosphamide. Rheumatology (Oxford) 2010. [DOI: 10.1093/rheumatology/keq726] [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: 11/13/2022] Open
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Jeddi-Tehrani M, Abbasi N, Dokouhaki P, Ghasemi J, Rezania S, Ostadkarampour M, Rabbani H, Akhondi M, Tahmasebi Fard Z, Zarnani A. Indoleamine 2,3-dioxygenase is expressed in the endometrium of cycling mice throughout the oestrous cycle. J Reprod Immunol 2009; 80:41-8. [DOI: 10.1016/j.jri.2009.02.003] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2008] [Revised: 12/04/2008] [Accepted: 02/02/2009] [Indexed: 11/30/2022]
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Abstract
Abstract Clinical features of systemic lupus erythematosus (SLE) have been described from different geographical regions in the world. However, data from many Middle East countries, including Iran, are scarce. This study aims to demonstrate the demographic, clinical, and laboratory characteristics in Iranian patients with SLE. In this prospective study, all the patients referring to Shiraz educational hospitals (Nemazi–Hafez) with SLE (American College of Rheumatology criteria) during a 5-year period (2001 to 2006) were included. A complete history was taken; physical examination and routine hematological, serological, and immunological tests were done for each patient. There were 356 women and 54 men with an average age of 30.27 years at the onset of disease. Of the patients, 78% had hematological abnormalities, 65.5% had articular involvement, 54.5% had photosensitivity, and 60.5% had malar rash. Serositis occurred in 38% of patients of whom 12% had pericarditis and 26% had pleuritis. Nephritis was diagnosed in 48% of the cases and consisted always of glomerular nephritis. Biopsy-proven lupus nephritis was in most cases class IV(49.7% of all the biopsies). Oral ulcers were observed in 28% of patients. Neuropsychiatric manifestations, gastrointestinal involvement, and lymphadenopathy were observed in 31.5%, 8.3%, and 14.2% of patients, respectively. In all, 93% of patients were positive for antinuclear antibodies, whereas antidouble-stranded DNA was positive in 83% of patients. Coomb’s positive hemolytic anemia appeared in 12.4% of the cases. Rheumatoid factor was detected in 9.7% of patients, and lupus erythematosus cell was seen in 32.5% of them. In all, 196 (47.8%) patients represented hypocomplementemia. Regarding hematological manifestations, 74.5% had microcytic hypochromic anemia, 64.6% had leukopenia, and 44.6% had thrombocytopenia; 18 (4.4%) patients died during the study period of which eight (2%) died because of cardiopulmonary involvement. Generally, there was more cutaneous, serositis, and neuropsychiatric involvement in our population than other Middle East countries. Serositis was associated with poorer prognosis, and the pattern of disease in these patients was much more sever than patients without serositis ( P = 0.001). This is the first study of its kind in Iran. More multicenter studies should be undertaken in Iran to describe the pattern of SLE.
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Affiliation(s)
- MA Nazarinia
- Rheumatology Department of Shiraz University of Medical Sciences, Shiraz, Iran
| | - F Ghaffarpasand
- Student Research Committee of Fasa University of Medical Sciences, Fasa, Iran
| | - A Shamsdin
- Student Research Committee of Fasa University of Medical Sciences, Fasa, Iran
| | - AA Karimi
- Student Research Committee of Fasa University of Medical Sciences, Fasa, Iran
| | - N Abbasi
- Student Research Committee of Fasa University of Medical Sciences, Fasa, Iran
| | - A Amiri
- Student Research Committee of Fasa University of Medical Sciences, Fasa, Iran
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Lesnikov VA, Abbasi N, Lesnikova MP, Lazaro CA, Campbell JS, Fausto N, Deeg HJ. Protection of human and murine hepatocytes against Fas-induced death by transferrin and iron. Apoptosis 2007; 11:79-87. [PMID: 16374550 DOI: 10.1007/s10495-005-3086-2] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
Recent studies in a murine model show that transferrin (Tf) interferes with Fas-mediated hepatocyte death and liver failure by decreasing pro-apoptotic and increasing anti-apoptotic signals. We show here in vitro in murine and human hepatocyte cell lines and in vivo in mice that Fas-induced apoptosis is modulated by exogenous Tf and iron. The results obtained with iron-free Tf (ApoTf), iron-saturated Tf (FeTf), and the iron chelator salicylaldehyde isonicotinoyl hydrazone (SIH) in its iron-free and iron-saturated (FeSIH) forms indicate that apoptosis-modulating effects of Tf are not mediated by iron alone. Both the Tf molecule and iron affect multiple aspects of cell death, and the route of iron delivery to the cell may be critical for the final outcome of cellular Fas signaling. Survival of hepatocytes 'stressed' by Fas signals can be manipulated by Tf and iron and may be a target for prophylactic and therapeutic interventions.
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Affiliation(s)
- V A Lesnikov
- Fred Hutchinson Cancer Research Center, Seattle, WA 98109-1024, USA.
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28
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Abbasi N, Tyagi SP, Saxena K, Hameed S. Histopathological study of endometrium in infertile women. J Obstet Gynaecol India 1977; 27:376-82. [PMID: 590591] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022] Open
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29
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Tyagi SP, Abbasi N, Hameed S. Study of endometrial glycogen in cases of infertility. J Obstet Gynaecol India 1977; 27:217-20. [PMID: 923996] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022] Open
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30
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Tyagi SP, Abbasi N, Saxena K, Rizvi R, Hameed S. Blood groups in cases of infertility. J Obstet Gynaecol India 1976; 26:762-4. [PMID: 828596] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022] Open
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