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Nandana V, Rathnayaka-Mudiyanselage IW, Muthunayak NS, Hatami A, Mousseau CB, Ortiz-Rodríguez LA, Vaishnav J, Collins M, Gega A, Mallikaarachchi KS, Yassine H, Ghosh A, Biteen JS, Zhu Y, Champion MM, Childers WS, Schrader JM. The BR-body proteome contains a complex network of protein-protein and protein-RNA interactions. bioRxiv 2023:2023.01.18.524314. [PMID: 36712072 PMCID: PMC9882336 DOI: 10.1101/2023.01.18.524314] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Abstract
Bacterial RNP bodies (BR-bodies) are non-membrane-bound structures that facilitate mRNA decay by concentrating mRNA substrates with RNase E and the associated RNA degradosome machinery. However, the full complement of proteins enriched in BR-bodies has not been defined. Here we define the protein components of BR-bodies through enrichment of the bodies followed by mass spectrometry-based proteomic analysis. We found 111 BR-body enriched proteins, including several RNA binding proteins, many of which are also recruited directly to in vitro reconstituted RNase E droplets, showing BR-bodies are more complex than previously assumed. While most BR-body enriched proteins that were tested cannot phase separate, we identified five that undergo RNA-dependent phase separation in vitro, showing other RNP condensates interface with BR-bodies. RNA degradosome protein clients are recruited more strongly to RNase E droplets than droplets of other RNP condensates, implying that client specificity is largely achieved through direct protein-protein interactions. We observe that some RNP condensates assemble with preferred directionally, suggesting that RNA may be trafficked through RNP condensates in an ordered manner to facilitate mRNA processing/decay, and that some BR-body associated proteins have the capacity to dissolve the condensate. Finally, we find that RNA dramatically stimulates the rate of RNase E phase separation in vitro, explaining the dissolution of BR-bodies after cellular mRNA depletion observed previously. Altogether, these results suggest that a complex network of protein-protein and protein-RNA interactions controls BR-body phase separation and RNA processing.
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Affiliation(s)
- V Nandana
- Wayne State University, Department of Biological Sciences, Detroit, MI
| | - I W Rathnayaka-Mudiyanselage
- Wayne State University, Department of Biological Sciences, Detroit, MI
- Wayne State University, Department of Chemistry, Detroit, MI
| | - N S Muthunayak
- Wayne State University, Department of Biological Sciences, Detroit, MI
| | - A Hatami
- Wayne State University, Department of Chemical Engineering and Materials Science, Detroit, MI
| | - C B Mousseau
- University of Notre Dame, Department of Chemistry, Notre Dame, IN
| | | | - J Vaishnav
- Wayne State University, Department of Chemical Engineering and Materials Science, Detroit, MI
| | - M Collins
- University of Pittsburgh, Department of Chemistry, Pittsburgh, PA
| | - A Gega
- Wayne State University, Department of Biological Sciences, Detroit, MI
| | | | - H Yassine
- Wayne State University, Department of Biological Sciences, Detroit, MI
| | - A Ghosh
- Wayne State University, Department of Biological Sciences, Detroit, MI
| | - J S Biteen
- University of Michigan, Department of Chemistry, Ann Arbor, MI
| | - Y Zhu
- Wayne State University, Department of Chemical Engineering and Materials Science, Detroit, MI
| | - M M Champion
- University of Notre Dame, Department of Chemistry, Notre Dame, IN
| | - W S Childers
- University of Pittsburgh, Department of Chemistry, Pittsburgh, PA
| | - J M Schrader
- Wayne State University, Department of Biological Sciences, Detroit, MI
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Hatami A, Dreyer CW, Meade MJ, Kaur S. Effectiveness of tongue-tie assessment tools in diagnosing and fulfilling lingual frenectomy criteria: a systematic review. Aust Dent J 2022; 67:212-219. [PMID: 35689515 PMCID: PMC9796854 DOI: 10.1111/adj.12921] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [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] [Accepted: 06/08/2022] [Indexed: 01/07/2023]
Abstract
It is unclear how effective tongue-tie classification assessment tools are in diagnosing symptomatic tongue-tie and fulfilling lingual frenectomy criteria. The purpose of this systematic review is to determine and evaluate any association between tongue-tie severity, as measured by pre-treatment assessment tools, and post-operative outcome following tongue-tie division. PubMed, EMBASE, and the Cochrane search engines were used to retrieve articles published between 1947 and 2021. Included studies consisted of patients with symptomatic tongue-tie, assessment by either the Coryllos, Kotlow, or Hazelbaker Assessment Tool for Lingual Frenulum Function (HATLFF) classification tool, and tongue-tie division. A total of 205 abstracts were identified; 31 studies met the criteria for a full-text review, of which, only 14 studies met the criteria for data extraction and analysis. Six studies used the HATLFF, 2 studies used the Kotlow, 5 studies used the Coryllos, and 1 study used a combination of both Kotlow and Coryllos methods. Significant heterogeneity was evident across all studies. No statistical correlation between the two variables could be determined. Although tongue-tie division procedures appear to provide benefits in breastfeeding and speech, there are no data to suggest a statistically significant association between the severity of tongue-tie, and the correct identification of patients who would benefit from tongue-tie division. © 2022 Australian Dental Association.
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Affiliation(s)
- A Hatami
- Adelaide Dental School, Faculty of Health and Medical SciencesThe University of AdelaideAdelaideAustralia
| | - CW Dreyer
- Adelaide Dental School, Faculty of Health and Medical SciencesThe University of AdelaideAdelaideAustralia
| | - MJ Meade
- Adelaide Dental School, Faculty of Health and Medical SciencesThe University of AdelaideAdelaideAustralia
| | - S Kaur
- Adelaide Dental School, Faculty of Health and Medical SciencesThe University of AdelaideAdelaideAustralia
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Fani Pakdel A, Hatami A, Salek R, Taghizadeh-Kermani A, Javadinia SA, Ghorbani A. Effects of a polyherbal formulation on the quality of life and survival of patients with common upper gastrointestinal cancers: A randomized placebo-controlled trial. Avicenna J Phytomed 2021; 11:566-575. [PMID: 34804894 PMCID: PMC8588958 DOI: 10.22038/ajp.2021.18132] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/09/2020] [Revised: 04/03/2021] [Accepted: 04/06/2021] [Indexed: 11/06/2022]
Abstract
OBJECTIVE Previous clinical trials have suggested that herbal medicines can improve the quality of life (QOL) and survival of cancer patients. This study was aimed to evaluate the effects of a polyherbal compound (PHC, formulated as syrup) consisting of Allium sativum, Curcuma longa, Panax ginseng, and Camellia sinensis on the quality of life (QOL) and survival in patients with upper gastrointestinal cancers. MATERIALS AND METHODS A randomized placebo-controlled trial was carried out on patients with esophageal or gastric cancer who had finished their oncological treatments. The patients were randomly assigned to PHC (n=20) or placebo (n=20) group. The PHC group was treated with the PHC for 12 weeks, while the placebo group received 70% sucrose syrup. The QOL was assessed at baseline and after 12 weeks. The patients were followed for up to 24 months to determine overall survival. RESULTS PHC significantly improved cancer-related symptoms, physical performance, and psychological and social functions of the patients (p<0.05 for all cases). Death occurred in 33 and 22% of cases in the placebo and PHC group, respectively. The mean survival time was 16.8 months (95% CI: 12.8-20.9) in the placebo group and 21.4 months (95% CI: 19.1-23.6) in the PHC group but the difference was not statistically significant. CONCLUSION The PHC improved cancer-related symptoms, physical performance, and psychological and social functions in patients with gastrointestinal cancers. It seems that this herbal compound has the potential to be used as a supplement in the management of cancer.
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Affiliation(s)
- Azar Fani Pakdel
- Cancer Research Center, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Ashkan Hatami
- Cancer Research Center, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Roham Salek
- Cancer Research Center, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Ali Taghizadeh-Kermani
- Surgical Oncology Research Center, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Seyed Alireza Javadinia
- Cellular and Molecular Research Center, Sabzevar University of Medical Sciences, Sabzevar, Iran
| | - Ahmad Ghorbani
- Pharmacological Research Center of Medicinal Plants, Mashhad University of Medical Sciences, Mashhad, Iran,Department of Pharmacology, Faculty of Medicine, Mashhad University of Medical Sciences, Mashhad, Iran,Corresponding Author: Tel: +98-5138002278, Fax: +98-5138828566,
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Hatami A, Dreyer C. The extraction of first, second or third permanent molar teeth and its effect on the dentofacial complex. Aust Dent J 2019; 64:302-311. [PMID: 31465537 DOI: 10.1111/adj.12716] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 08/12/2019] [Indexed: 11/30/2022]
Abstract
The extraction of permanent molar teeth was first introduced in 1976 as a substitution for premolar extraction in cases with mild crowding. Since then, a number of studies have investigated the effect of permanent molar extraction on dentofacial harmony. Undertaking the procedure of molar extraction is most commonly recommended in response to factors such as: gross caries, large restorations and root-filled teeth, along with its application in the management of anterior open bite and reduction in crowding in facial regions. It has been indicated, however, that before undertaking the extraction of molar teeth it is important to investigate the potential influence of the procedure on other molars, with particular consideration of their eruption path. This is due to the doubt as to the effect of the exact molar teeth extraction and their consequences. In light of this, This review was undertaken to investigate and compare the effect of first, second and the third molar teeth extraction and their subsequent dentofacial complex changes.
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Affiliation(s)
- A Hatami
- Department of Orthodontics, School of Dentistry, The University of Adelaide, Adelaide, South Australia, Australia
| | - C Dreyer
- Department of Orthodontics, School of Dentistry, The University of Adelaide, Adelaide, South Australia, Australia
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Hatami A, Rashno Z, Hamidinejat H, Youssefi MR. Molecular identification of macroscopic cysts of Sarcocystis in sheep in Babol, in the north of Iran. Trop Biomed 2017; 34:405-411. [PMID: 33593021] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Sarcocystis is one of the most prevalent parasite in domestic animals in the world. In this study, we examined 50 macroscopic cysts in sheep muscles from Babol, in the north of Iran. Genomic DNA extraction and polymerase chain reaction (PCR) were performed to amplify a 609bp length based on 18S rRNA gene. The results of restriction of AvaI, Hind II, TaqI and EcoRI enzymes demonstrated that all the samples were Sarcocystis gigantea. The results of this study supports the importance of molecular techniques for characterization of Sarcocystis species when valid preventive programs for identification and source of infection and progression of immunological diagnosis strategies are needed.
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Affiliation(s)
- A Hatami
- Department of Parasitology, Division of Pathobiology, Shahid Chamran University, Ahvaz, Iran
| | - Z Rashno
- Department of Medical Parasitology and Mycology, Kerman University of Medical Sciences, 76169-14115, Kerman, Iran
| | - H Hamidinejat
- Department of Parasitology, Division of Pathobiology, Shahid Chamran University, Ahvaz, Iran
| | - M R Youssefi
- Department of Veterinary Parasitology, Faculty of Veterinary Medicine, Islamic Azad University, Babol Branch, Babol
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Hatami A, Bastani D, Najafi F. Investigation the effect of super hydrophobic titania nanoparticles on the mass transfer performance of single drop liquid-liquid extraction process. Sep Purif Technol 2017. [DOI: 10.1016/j.seppur.2016.11.063] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Commin MH, Kokta V, Hatami A, McCuaig C. Le syndrome CHIME : un syndrome neuroectodermique associé à une ichtyose lamellaire migratrice. Ann Dermatol Venereol 2016. [DOI: 10.1016/j.annder.2016.09.429] [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: 11/15/2022]
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Commin MH, Powell J, Hatami A, Dubois J. Forme fruste de syndrome « CLAPO » ? Ann Dermatol Venereol 2016. [DOI: 10.1016/j.annder.2016.09.468] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Hatami A, Khoshgoftarmanesh AH. Antioxidative response of olive to air emissions from tire burning under various zinc nutritional treatments. Environ Sci Pollut Res Int 2016; 23:24922-24931. [PMID: 27662862 DOI: 10.1007/s11356-016-7666-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/20/2015] [Accepted: 09/09/2016] [Indexed: 06/06/2023]
Abstract
Uniform 2-year old seedlings of a commercial olive cultivar (Olea europaea L., cv. Mahzam) were exposed or unexposed to the air pollution from the controlled burning of waste tires. The plants were supplied with zinc sulfate (ZnSO4) or synthesized Zn(Glycine)2 (Zn-Gly) or unsupplied with Zn. Exposure to air pollution resulted in oxidative damage to the olive, as indicated by the higher production of malondialdehyde (MDA). Supplement with Zn partly alleviated oxidative damage induced by the air emissions on the olive. Leaf concentration of MDA was higher at the active period of tire burning than that of the inactive one. Exposure to the emissions from tire burning significantly increased leaf ascorbate peroxidase (APX) activity. Supplement with Zn increased APX activity in plants exposed to the air pollution. According to the results, Zn nutrition was effective in alleviating oxidative stress induced by air pollution on the olive. APX seemed to play a significant role in alleviating oxidative damages induced by air emissions from tire burning on the olive; however, the role of other antioxidant enzymes should be addressed in future studies.
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Affiliation(s)
- Ashkan Hatami
- Department of Soil Sciences, College of Agriculture, Isfahan University of Technology, Isfahan, 84156-83111, Iran
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Alakeel A, Powell J, Hatami A, Andelfinger G, Kokta V, McCuaig C. Syndrome de Hypotrichosis-Lymphedema-Telangiectasia avec mutation du gène SOX 18. Ann Dermatol Venereol 2015. [DOI: 10.1016/j.annder.2015.10.264] [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: 11/15/2022]
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Ramien M, Kugler P, Powell J, Laberge L, Hatami A, Dubois J, Kokta V, McCuaig C. Hémangiomes verruqueux : à différencier des angiokératomes. Ann Dermatol Venereol 2014. [DOI: 10.1016/j.annder.2014.09.185] [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: 11/25/2022]
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Haghi G, Hatami A, Mehran M, Hosseini H. Caffeic acid derivatives from Bupleurum chinense. Res Pharm Sci 2014; 9:323-30. [PMID: 25657804 PMCID: PMC4318000] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
In this study, caffeic acid (CA) and its three derivatives including 3-caffeoylquinic acid (3-CQA, neochlorogenic acid), 4-caffeoylquinic acid (4-CQA, cryptochlorogenic acid), and 5-caffeoylquinic acid (5-CQA, chlorogenic acid) were identified in Bupleurum chinense aerial parts using reverse-phase high-performance liquid chromatography (RP-HPLC) with photodiode array (PDA) detector, reference compounds and chemical reactions. Separation was performed on a C18 column using gradient elution with 4% (v/v) aqueous acetic acid and acetonitrile as mobile phase at ambient temperature. In addition, the flavonoid aglycones were characterized and quantified after acid hydrolysis of the plant material. The flavonols profile showed quercetin (0.36 g per 100 g), kaempferol (1.11 g per 100 g) and isorhamnetin (0.16 g per 100 g). Total phenolic and total flavonoid contents ranged from 7.3 to 18.7% and 0.58 to 2.72% in dry plant material, respectively.
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Affiliation(s)
- G. Haghi
- Phytochemistry Group, Barij Essence Medicinal Plants Research Center, Kashan, I.R. Iran
| | - A. Hatami
- Phytochemistry Group, Barij Essence Medicinal Plants Research Center, Kashan, I.R. Iran
| | - M. Mehran
- Phytochemistry Group, Barij Essence Medicinal Plants Research Center, Kashan, I.R. Iran
| | - H. Hosseini
- Agriculture Group, Barij Essence Medicinal Plants Research Center, Kashan, I.R. Iran
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Piram M, McCuaig CC, Saint-Cyr C, Marcoux D, Hatami A, Haddad E, Powell J. Short- and long-term outcome of linear morphoea in children. Br J Dermatol 2014; 169:1265-71. [PMID: 24032480 DOI: 10.1111/bjd.12606] [Citation(s) in RCA: 48] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 08/27/2013] [Indexed: 11/28/2022]
Abstract
BACKGROUND Linear morphoea (LM) is a rare fibrosing disorder of the limbs or the face that may cause functional disability and severe aesthetic sequelae. Despite a wide range of therapeutics reported for LM, there is currently a lack of consensus on the optimal therapy. Little is known about the long-term outcome of this disease. OBJECTIVES To describe the short- and long-term outcome of a large series of patients with LM acquired in childhood. METHODS A retrospective chart review of 52 paediatric patients with LM seen in our centre during a 20-year span (1990-2010) and a telephone survey in 2011 to assess the long-term outcome of these patients. RESULTS Limbs were affected twice as often as the face, with a higher proportion of female patients. Stabilization was obtained after a mean disease duration of 5·4 years. Patients sometimes experienced long stretches of disease quiescence followed by reactivation; 31% of patients reported active disease after 10 years. All but one patient had aesthetic sequelae, and 38% had functional limitations. The effectiveness of methotrexate and systemic corticosteroids was apparent in the short term. CONCLUSIONS LM needs prolonged monitoring as the disease can have very long periods of quiescence followed by reactivation. The combination of methotrexate and systemic corticosteroids was effective in the early stages of the disease but did not seem to prevent long-standing active disease or relapse in the long term.
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Affiliation(s)
- M Piram
- Division of Dermatology (Department of Pediatrics), CHU Sainte Justine, Université de Montréal, Montréal, QC, Canada; Department of Pediatrics and Pediatric Rheumatology, CHU de Bicêtre, Université Paris Sud, 78 Avenue du Général Leclerc, 94270, Le Kremlin Bicêtre, France
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Hamidpour E, Mirzaei-Paiaman A, Ramazani S. A. A, Hatami A. Analysis of Capillary–Viscous–Gravity Forces in Biopolymer Flooding with a Sensitivity Analysis on Polymer and Porous Medium Parameters. J DISPER SCI TECHNOL 2014. [DOI: 10.1080/01932691.2013.858347] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Haghi G, Hatami A, Safaei A, Mehran M. Analysis of phenolic compounds in Matricaria chamomilla and its extracts by UPLC-UV. Res Pharm Sci 2014; 9:31-7. [PMID: 25598797 PMCID: PMC4292179] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022] Open
Abstract
Chamomile (Matricaria chamomilla L.) is a widely used medicinal plant possessing several pharmacological effects due to presence of active compounds. This study describes a method of using ultra performance liquid chromatography (UPLC) coupled with photodiode array (PDA) detector for the separation of phenolic compounds in M. chamomilla and its crude extracts. Separation was conducted on C18 column (150 mm × 2 mm, 1.8 μm) using a gradient elution with a mobile phase consisting of acetonitrile and 4% aqueous acetic acid at 25°C. The method proposed was validated for determination of free and total apigenin and apigenin 7-glucoside contents as bioactive compounds in the extracts by testing sensitivity, linearity, precision and recovery. In general, UPLC produced significant improvements in method sensitivity, speed and resolution. Extraction was performed with methanol, 70% aqueous ethanol and water solvents. Total phenolic and total flavonoid contents ranged from 1.77 to 50.75 gram (g) of gallic acid equivalent (GAE)/100 g and 0.82 to 36.75 g quercetin equivalent (QE)/100 g in dry material, respectively. There was a considerable difference from 40 to 740 mg/100 g for apigenin and 210 to 1110 mg/100 g for apigenin 7-glucoside in dry material.
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Affiliation(s)
- G. Haghi
- Phytochemistry Group, Jundi Shapour Medicinal Plants Research Center, Kashan, I.R. Iran,Barij Essence Pharmaceutical Company Research Center, Kashann, I.R. Iran,Corresponding author: G. Haghi Tel. 0098 866 4362112, Fax. 0098 866 4362187 E-mail:
| | - A. Hatami
- Phytochemistry Group, Jundi Shapour Medicinal Plants Research Center, Kashan, I.R. Iran,Barij Essence Pharmaceutical Company Research Center, Kashann, I.R. Iran
| | - A. Safaei
- Phytochemistry Group, Jundi Shapour Medicinal Plants Research Center, Kashan, I.R. Iran,Barij Essence Pharmaceutical Company Research Center, Kashann, I.R. Iran
| | - M. Mehran
- Barij Essence Pharmaceutical Company Research Center, Kashann, I.R. Iran
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Mojgani N, Maldjae V, Rahbar M, Mirafzali SM, Khoshnood S, Hatami A. Intraperitoneal inoculation of Haemophilus influenzae local isolates in BALB/c mice model in the presence and absence of virulence enhancement agents. Indian J Med Microbiol 2013; 31:148-53. [PMID: 23867671 DOI: 10.4103/0255-0857.115236] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Abstract
PURPOSE Haemophilus influenzae (Hi), predominantly type b accounts for approximately 4% of cases of community-acquired and nosocomial meningitis, in adults. The objective of this study was to evaluate the pathogenicity of local Hi isolates (type b, f and non-typable) in BALB/c mice in the presence of virulence enhancement agents. MATERIALS AND METHODS Three different concentrations of the Hi isolates were inoculated intraperitoneally in BALB/c mice in the presence of 2% hemoglobin and 4% mucin as virulence enhancing agents (VEA). The ability of the isolates to produce bacteremia, the percent survival and lethal dose (LD50) were recorded in different challenge groups. RESULTS The 3 Haemophilus influenzae type b (Hib) isolates used in study were able to show virulence in BALB/c mice model only in the presence of VEA and their LD50 decreased significantly when 2% hemoglobin and 4% mucin were used. All survived animals showed bacteremia within 4 h of inoculation which was cleared within 18 h. Significant differences (P<0.01) in the virulence and survival percentage of Hib challenge groups were observed based on their dose of inoculation and VEA. None of the isolates were able to induce infection in the absence of VEA. Non-type b isolates failed to produce disease in the mice models even at the highest inoculated dose (10⁸ cfu) and in the presence of VEA. CONCLUSIONS BALB/c mice appeared suitable for evaluating the virulence of Hib strains, and 2% hemoglobin with 4% mucin an appropriate concentration for inducing infection in this animal model.
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Affiliation(s)
- N Mojgani
- Biotechnology Department, Iran Reference Health Lab, Ministry of Health and Medical Education, Milad National Hospital, Tehran, Iran
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Lacombe Barrios J, Paradis L, Hatami A, Paradis J, Des Roches A. A Case Series Of Severe Atopic Dermatitis Treated By Anti-ige Therapy: A Paediatric Perspective. J Allergy Clin Immunol 2012. [DOI: 10.1016/j.jaci.2011.12.807] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Watson JB, Hatami A, David H, Masliah E, Roberts K, Evans CE, Levine MS. Alterations in corticostriatal synaptic plasticity in mice overexpressing human alpha-synuclein. Neuroscience 2009; 159:501-13. [PMID: 19361478 DOI: 10.1016/j.neuroscience.2009.01.021] [Citation(s) in RCA: 80] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2008] [Revised: 01/10/2009] [Accepted: 01/13/2009] [Indexed: 11/28/2022]
Abstract
Most forms of Parkinson's disease (PD) are sporadic in nature, but some have genetic causes as first described for the alpha-synuclein gene. The alpha-synuclein protein also accumulates as insoluble aggregates in Lewy bodies in sporadic PD as well as in most inherited forms of PD. The focus of the present study is the modulation of synaptic plasticity in the corticostriatal pathway of transgenic (Tg) mice that overexpress the human alpha-synuclein protein throughout the brain (ASOTg). Paired-pulse facilitation was detected in vitro by activation of corticostriatal afferents in ASOTg mice, consistent with a presynaptic effect of elevated human alpha-synuclein. However basal synaptic transmission was unchanged in ASOTg, suggesting that human alpha-synuclein could impact paired-pulse facilitation via a presynaptic mechanism not directly related to the probability of neurotransmitter release. Mice lacking alpha-synuclein or those expressing normal and A53T human alpha-synuclein in tyrosine hydroxylase-containing neurons showed, instead, paired-pulse depression. High-frequency stimulation induced a presynaptic form of long-term depression solely in ASOTg striatum. A presynaptic, N-methyl-d-aspartate receptor-independent form of chemical long-term potentiation induced by forskolin (FSK) was enhanced in ASOTg striatum, while FSK-induced cAMP levels were reduced in ASOTg synaptoneurosome fractions. Overall the results suggest that elevated human alpha-synuclein alters presynaptic plasticity in the corticostriatal pathway, possibly reflecting a reduction in glutamate at corticostriatal synapses by modulation of adenylyl cyclase signaling pathways. ASOTg mice may recapitulate an early stage in PD during which overexpressed alpha-synuclein dampens corticostriatal synaptic transmission and reduces movement.
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Affiliation(s)
- J B Watson
- Department of Psychiatry and Biobehavioral Sciences, David Geffen School of Medicine at UCLA, Los Angeles, CA 90095, USA.
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Herr AL, Hatami A, Kokta V, Dalle JH, Champagne MA, Duval M. Successful anti-CD20 antibody treatment of pemphigus foliaceus after unrelated cord blood transplantation. Bone Marrow Transplant 2005; 35:427-8. [PMID: 15640817 DOI: 10.1038/sj.bmt.1704808] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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