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Sharif A, Shah NA, Rauf A, Hadayat N, Gul A, Nawaz G, Sakhi S, Iqbal M, Khan MR, Shah AA, Azam N, Iftikhar H, Shah SA, Bahadur S, Hussain F, Shuaib M. Ethnomedicinal uses of plants for various diseases in the remote areas of Changa Manga Forest, Pakistan. BRAZ J BIOL 2024; 84:e255916. [DOI: 10.1590/1519-6984.255916] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2021] [Accepted: 02/01/2022] [Indexed: 11/22/2022] Open
Abstract
Abstract This study aims at reporting the indigenous knowledge of the medicinal flora from the inhabitants of surroundings of the World’s largest artificial planted forest “Changa Manga”, Pakistan. Data were collected by direct interviews and group meetings from 81 inhabitants including 32 local healers having information regarding the use of indigenous medicinal plants over a period of one year. Different statistical tools were applied to analyze the data including Frequency citation (FC), Relative frequency citation (RFC), Use Value, Factor of informants consensus and fidelity level. This study reported 73 plant species belonging to 37 plant families and 46 genera. The majority of plant species belong to compositae family. The most commonly used medicinal plants were P. hysterophorus L., P. dactylifera L., S. indicum L, P. harmala L., P. emblica L., and A. indica A.Juss. The greatest number of species was used to cure gastrointestinal disorders. The highest fidelity level (68.18%) was of E. helioscopia to cure gastrointestinal disorders. Maximum fresh uses (17) were reported by C. dactylon (L.) Pars. While the highest number of species reporting fresh uses in similar number was 13. In this study, five novel plants are being reported for the first time in Pakistan for their ethnomedicinal worth. Our data reflect unique usage of the medicinal plants in the study area. The statistical tools used in the study proved useful in pointing the most important and disease category specific plants. High use value plant and the new reported medicinal plants might prove an important source of the isolation of pharmacologically active compounds.
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Affiliation(s)
| | | | - A. Rauf
- University of AWAKUM, Pakistan
| | | | - A. Gul
- Hazara University, Pakistan
| | - G. Nawaz
- Kohat University of Science and Technology, Pakistan
| | | | | | | | - A. A. Shah
- Jazan University, Kingdom of Saudi Arabia
| | - N. Azam
- University of Peshawar, Pakistan
| | | | - S. A. Shah
- National University of Medical Sciences, Pakistan
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Shuaib M, Hussain F, Rauf A, Jan F, Romman M, Parvez R, Zeb A, Ali S, Abidullah S, Bahadur S, Shah AA, Azam N, Dilbar S, Begum K, Khan H, Sajjad S, Muhammad I, Shah NA. Traditional knowledge about medicinal plant in the remote areas of Wari Tehsil, Dir Upper, Pakistan. BRAZ J BIOL 2021; 83:e246803. [PMID: 34495160 DOI: 10.1590/1519-6984.246803] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2020] [Accepted: 01/20/2021] [Indexed: 11/21/2022] Open
Abstract
Traditional medicine is cheaper and easily available to local people, to care for most frequent diseases in the Northern parts of Pakistan. Our study aimed at inventorying medicine from local plants, documenting their uses, and assessing their market value in 2015-2018 during spring, summer, and winter seasons. A total of 15 trips were made, 5 in each season. Semi-structured interviews with 165 inhabitant's age range between 20-80 years were conducted, analyzed the data is analyzed using Relative frequency of citation(RFC), Use Value(UV), Fidelity Level(FL), Informants consensus factor(ICF), and Jaccard index(JI) to find the most frequent and well-known used species in the area. A total of 86 species belonging to 39 vascular plant families, 33 genera were documented as medicinally important. Family Asteraceae was observed as the dominant family among all the families with 10 species, the leaf was the most used parts and decoction 36% was the most preferred preparation type. Herb was the predominant life form (67%). The maximum UV (0.92) was demonstrated by J. adhatoda L. species, while A. sativum L. shows maximum RFC (0.58), the highest ICF value represented by diarrhea and dermatitis 0.92, and high FL value is recorded 100%. According to our collections, wild species were 45%, invasive species were 38% and cultivated 17% recorded, dicots species were recorded more 81%. Seven 7 medicinal species is being economically important and export to the local and international market of the world, whereas P. integrima L. species were the most exported species according to the local dealers. The investigated area is rural and the local people depend on the area's plants for their health needs, and other uses like a vegetable, fuelwood, fodder, etc. The current result of RFC, UV, ICF, FL, and JI shows that medicinal flora needs to be pharmacologically and phytochemically investigated to prove their efficacy. The documentation of medicinal knowledge is important to preserve this precious old knowledge before it is lost forever, due to technological and environmental changes in the world.
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Affiliation(s)
- M Shuaib
- Yunnan University, School of Ecology and Environmental Science, Kunming, PR China
| | - F Hussain
- Cholistan University of Veterinary & Animal Sciences, Department of Microbiology, Bahawalpur, Pakistan
| | - A Rauf
- Abdulwali Khan University, Department of Botany, Mardan, Pakistan
| | - F Jan
- Abdulwali Khan University, Department of Botany, Mardan, Pakistan
| | - M Romman
- University of Chitral, Department of Botany, Chitral, Pakistan
| | - R Parvez
- Abdulwali Khan University, Department of Botany, Mardan, Pakistan.,Government Girls Degree College Dargai, Department of Botany, District Malakand, Pakistan
| | - A Zeb
- Abdulwali Khan University, Department of Botany, Mardan, Pakistan
| | - S Ali
- Abdulwali Khan University, Department of Botany, Mardan, Pakistan
| | - S Abidullah
- Abdulwali Khan University, Department of Botany, Mardan, Pakistan
| | - S Bahadur
- Hainan University, College of Forestry, Haikou, China
| | - A A Shah
- Jazan University, Department of Medical Laboratory Technology, Jazan, Saudi Arabia
| | - N Azam
- University of Peshawar, Centre of Plant Biodiversity, Peshawar, Pakistan
| | - S Dilbar
- University of Swat, Centre of Plant Biodiversity, Swat, Pakistan
| | - K Begum
- University of Hazara, Department of Genetic, Manshera, Pakistan
| | - H Khan
- University of Swat, Center of Biotechnology and Microbiology, Swat, Pakistan
| | - S Sajjad
- COMSATS University, Department of Biosciences, Park Road Islamabad, Pakistan
| | - I Muhammad
- University of Hazara, Department of Genetic, Manshera, Pakistan
| | - N A Shah
- COMSATS University, Department of Biosciences, Park Road Islamabad, Pakistan
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Cherkaoui A, Renzi G, Fischer A, Azam N, Schorderet D, Vuilleumier N, Schrenzel J. Comparison of the Copan WASPLab incorporating the BioRad expert system against the SIRscan 2000 automatic for routine antimicrobial disc diffusion susceptibility testing. Clin Microbiol Infect 2019; 26:619-625. [PMID: 31733376 DOI: 10.1016/j.cmi.2019.11.008] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2019] [Revised: 11/01/2019] [Accepted: 11/03/2019] [Indexed: 10/25/2022]
Abstract
OBJECTIVES This study investigated the agreement at the categorical level between the Copan WASPLab incorporating the BioRad expert system against the SIRscan 2000 automatic for antimicrobial disc diffusion susceptibility testing. METHODS The 338 clinical strains (67 Pseudomonas aeruginosa, 19 methicillin-resistant Staphylococcus aureus, 75 methicillin-sensitive S. aureus and 177 Enterobacterales isolates) analysed in this study were non-duplicate isolates obtained from consecutive clinical samples referred to the clinical bacteriology laboratory at Geneva University Hospitals between June and August 2019. For the WASPLab the inoculum suspension was prepared in strict accordance with the manufacturer's instruction (Copan WASP srl, Brescia, Italy) by adding 2 mL of the 0.5 McFarland primary suspension used for the SIRscan analysis into a sterile tube filled with 4 mL of sterile saline (1:3 dilution). The inoculum (2 × 30 μL loop/spreader) was spread over the entire surface of Mueller-Hinton agar plates according to the AST streaking pattern defined by Copan. The antibiotic discs were dispensed by the WASP and inoculated media were loaded on conveyors for transfer to the automatic incubators. The plates were incubated for 16 h, and several digital images were acquired. Inhibition zone diameters were automatically read by the WASPLab and were adjusted manually whenever necessary. For the SIRscan 2000 automatic, the antimicrobial disc diffusion susceptibility testing was performed according to the EUCAST guidelines. The gradient strip method was used to resolve discrepancies. RESULTS The overall categorical agreement between the compared methods reached 99.1% (797/804; 95% CI 98.2%-99.6%), 99.5% (1029/1034; 95% CI 98.9%-99.8%), and 98.8% (2798/2832; 95% CI 98.3%-99.1%) for P. aeruginosa, S. aureus and the Enterobacterales, respectively. CONCLUSIONS WASPLab incorporating the BioRad expert system provides a fully automated solution for antimicrobial disc diffusion susceptibility testing with equal or better accuracy than other available phenotypic methods.
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Affiliation(s)
- A Cherkaoui
- Bacteriology Laboratory, Division of Laboratory Medicine, Department of Diagnostics, Geneva University Hospitals, Geneva, Switzerland.
| | - G Renzi
- Bacteriology Laboratory, Division of Laboratory Medicine, Department of Diagnostics, Geneva University Hospitals, Geneva, Switzerland
| | - A Fischer
- Bacteriology Laboratory, Division of Laboratory Medicine, Department of Diagnostics, Geneva University Hospitals, Geneva, Switzerland
| | - N Azam
- Bacteriology Laboratory, Division of Laboratory Medicine, Department of Diagnostics, Geneva University Hospitals, Geneva, Switzerland
| | - D Schorderet
- Bacteriology Laboratory, Division of Laboratory Medicine, Department of Diagnostics, Geneva University Hospitals, Geneva, Switzerland
| | - N Vuilleumier
- Division of Laboratory Medicine, Department of Diagnostics, Geneva University Hospitals, Geneva, Switzerland; Division of Laboratory Medicine, Department of Medical Specialities, Faculty of Medicine, Geneva, Switzerland
| | - J Schrenzel
- Bacteriology Laboratory, Division of Laboratory Medicine, Department of Diagnostics, Geneva University Hospitals, Geneva, Switzerland; Genomic Research Laboratory, Division of Infectious Diseases, Department of Medicine, Geneva University Hospitals and Faculty of Medicine, Geneva, Switzerland
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Khan S, Ijaz A, Bokhari SR, Hanif M, Azam N. Frequency of impaired glucose tolerance and diabetes mellitus in subjects with fasting blood glucose below 6.1 mmol/L [110 mg/dL]. East Mediterr Health J 2013. [DOI: 10.26719/2013.19.2.175] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Khan SH, Ijaz A, Bokhari SAR, Hanif MS, Azam N. Frequency of impaired glucose tolerance and diabetes mellitus in subjects with fasting blood glucose below 6.1 mmol/L (110 mg/dL). East Mediterr Health J 2013; 19:175-180. [PMID: 23516829] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
The diagnosis of diabetes mellitus by the available criteria is controversial and relies heavily on fasting glucose results. This cross-sectional study in 2010-2011 aimed to measure the frequency of impaired glucose tolerance and diabetes mellitus in 127 subjects having fasting blood glucose < 7.0 mmol/L and to measure the agreement between different standard diagnostic criteria. Subjects presenting to a laboratory for analysis of fasting blood glucose for excluding diabetes mellitus underwent a 2-hour 75 g oral glucose challenge. A total of 40.6% of subjects with fasting blood glucose from 5.6-6.0 mmol/L had abnormal glucose regulation on the basis ofthe gold standard glucose challenge. Agreement between American Diabetes Association and World Health Organization diagnostic criteria was only fair (kappa = 0.32). Abnormalities of glucose metabolism including impaired glucose tolerance and diabetes mellitus can exist at fasting blood glucose results < 6.1 mmol/L (110 mg/dL).
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Affiliation(s)
- S H Khan
- Department of Pathology, PNS Rahat Hospital, Karachi, Pakistan.
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Abstract
AIM AND METHODS To assess the way different terms used to describe a fracture affect the understanding a patient has of that fracture. The perceived severity of the injury and how the patient expects to be treated were also recorded with a view to optimising patient understanding. RESULTS There was a very significant difference between what doctors can potentially say and what the patient ultimately understood about the consultation. This could have a direct effect on the management the patient expects from the initial description and diagnosis. CONCLUSIONS It is important that doctors in the emergency department use terminology that is understood by the patient, as well as emphasising the potential seriousness of the injury. It is possibly better therefore to use informed lay terminology such as 'a break in a bone' rather than more formal vocabulary such 'a fracture' when discussing the diagnosis and treatment options.
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Affiliation(s)
- N Azam
- James Cook University Hospital, Middlesbrough, UK
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Whitehead I, Azam N, Bonner S, Wright J. Outcomes from subarachnoid haemorrhage. Crit Care 2009. [PMCID: PMC4083992 DOI: 10.1186/cc7270] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
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Azam N, Moshkovska T, Mayberry JF. Views of specialist registrars on specialty care in the community: employment prospects and the need for additional training. Postgrad Med J 2007; 83:59-61. [PMID: 17267680 PMCID: PMC2599954 DOI: 10.1136/pgmj.2006.054320] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
AIM To obtain the views of specialist registrars on specialty care in the community. METHOD Specialist registrars from five Deaneries in England completed an online questionnaire about their views on employment prospects, the role of specialty care in the community, and the need for additional training in this area. RESULTS One hundred and twenty seven replies were received over a four week period. Thirty (24%) viewed their future employment prospects as consultants as poor or very worrying. Seventy seven (61%) specialist registrars considered that as consultants they will need to work directly in the community. Thirty nine of these (51%) considered the need to work close to patients directly in the community as either a "bad" or "very bad" development. However, 102 (80%) specialist registrars believed that they should receive training on the delivery of specialty care in the community and 96 (76%) wanted this in the form of a university based degree.
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Affiliation(s)
- N Azam
- Leicester General Hospital, Gwendolen Road, Leicester LE5 4PW, UK
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Azam N, Douglas L, McConnell S. Anaphylaxis in Association with Heparin-Induced Thrombocytopenia. Hemodial Int 2004. [DOI: 10.1111/j.1492-7535.2004.0085bz.x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Affiliation(s)
- R Carroll
- Centre for Physical Education and Leisure Studies, University of Manchester, UK
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Azam N, Vairapandi M, Zhang W, Hoffman B, Liebermann DA. Interaction of CR6 (GADD45gamma ) with proliferating cell nuclear antigen impedes negative growth control. J Biol Chem 2001; 276:2766-74. [PMID: 11022036 DOI: 10.1074/jbc.m005626200] [Citation(s) in RCA: 75] [Impact Index Per Article: 3.3] [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: 11/06/2022] Open
Abstract
GADD45, MyD118, and CR6 (also termed GADD45alpha, beta, and gamma) comprise a family of genes that encode for related proteins playing important roles in negative growth control, including growth suppression. Data accumulated suggest that MyD118/GADD45/CR6 serve similar but not identical functions along different apoptotic and growth suppressive pathways. It is also apparent that individual members of the MyD118/GADD45/CR6 family are differentially induced by a variety of genetic and environmental stress agents. The MyD118, CR6, and GADD45 proteins were shown to predominantly localize within the cell nucleus. Recently, we have shown that both MyD118 and GADD45 interact with proliferating cell nuclear antigen (PCNA), a protein that plays a central role in DNA replication, DNA repair, and cell cycle progression, as well as with the universal cyclin-dependent kinase inhibitor p21. In this work we show that also CR6 interacts with PCNA and p21. Moreover, it is shown that CR6 interacts with PCNA via a domain that also mediates interaction of both GADD45 and MyD118 with PCNA. Importantly, evidence has been obtained that interaction of CR6 with PCNA impedes the function of this protein in negative growth control, similar to observations reported for MyD118 and GADD45.
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Affiliation(s)
- N Azam
- Fels Institute for Cancer Research and Molecular Biology and the Department of Biochemistry, Temple University School of Medicine, Philadelphia, Pennsylvania 19140, USA
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Vairapandi M, Azam N, Balliet AG, Hoffman B, Liebermann DA. Characterization of MyD118, Gadd45, and proliferating cell nuclear antigen (PCNA) interacting domains. PCNA impedes MyD118 AND Gadd45-mediated negative growth control. J Biol Chem 2000; 275:16810-9. [PMID: 10828065 DOI: 10.1074/jbc.275.22.16810] [Citation(s) in RCA: 103] [Impact Index Per Article: 4.3] [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: 12/30/2022] Open
Abstract
MyD118 and Gadd45 are related genes encoding for proteins that play important roles in negative growth control, including growth suppression and apoptosis. MyD118 and Gadd45 are related proteins that previously were shown to interact with proliferating cell nuclear antigen (PCNA), implicated in DNA replication, DNA repair, and cell cycle progression. To establish the role of MyD118 and Gadd45 interactions with PCNA, in this work we sought to identify the interacting domains and analyze the significance of this interaction in negative growth control. Using complementary in vivo and in vitro interaction assays the N-terminal (1-46) and middle (100-127) regions of PCNA were identified as harboring MyD118- and Gadd45 interacting domains, whereas PCNA interacting domains within MyD118 and Gadd45 were localized to the C termini of these proteins (amino acids 114-156 and 137-165, respectively). These findings provide first evidence that similar domains within MyD118 and Gadd45 mediate interactions with PCNA. Importantly, ectopic expression of MyD118 or Gadd45 N-terminal peptides, lacking the PCNA interacting domain, was found to suppress colony formation or induce apoptosis more efficiently than the full-length proteins. These findings suggest that interaction of MyD118 or Gadd45 with PCNA, in essence, serves to impede negative growth control.
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Affiliation(s)
- M Vairapandi
- Fels Institute for Cancer Research and Molecular Biology and the Department of Biochemistry, Temple University School of Medicine, Philadelphia, Pennsylvania 19140, USA
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Abstract
We retrospectively reviewed the clinical records and radiographs of 100 patients who had had supernumerary teeth removed. Their mean (SD) age was 9 years 3 months (2). The 100 patients had a total of 127 unerupted maxillary incisors associated with supernumerary teeth. The supernumerary tooth was removed without exposure of the permanent tooth more often among the 79 younger children (aged 10 years or less) (SND=3.52, P<0.01), and when the incisors were less mature (Cvek classification 1, 2, and 3) (SND=5.27, P<0.01). Of these incisors with immature roots that were treated conservatively, 60 (72%) erupted and 24 (28%) required further operation. Of the mature incisors treated conservatively, 10 (63%) required further operation. In this study, almost three-quarters of immature incisors erupted spontaneously after removal of the associated supernumerary teeth. Over half of the mature teeth required further operation. Mature teeth should be exposed with or without bonding at the time of removal of the supernumerary teeth.
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Affiliation(s)
- C Mason
- Department of Paediatric Dentistry, Eastman Dental Institute for Oral Healthcare Sciences, London, UK
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Zhang W, Bae I, Krishnaraju K, Azam N, Fan W, Smith K, Hoffman B, Liebermann DA. CR6: A third member in the MyD118 and Gadd45 gene family which functions in negative growth control. Oncogene 1999; 18:4899-907. [PMID: 10490824 DOI: 10.1038/sj.onc.1202885] [Citation(s) in RCA: 122] [Impact Index Per Article: 4.9] [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] [Received: 01/08/1999] [Revised: 03/30/1999] [Accepted: 03/30/1999] [Indexed: 11/08/2022]
Abstract
MyD118 and Gadd45 are two related genes which encode for proteins that play important roles in negative growth control, including both growth suppression and apoptosis. A strategy was employed to clone new members of the MyD118 and Gadd45 family of genes. Based on alignment of the deduced amino acid sequences, one cDNA clone was found to encode for the murine homologue of human CR6, originally cloned as an IL-2 immediate-early response gene. The murine and human CR6 proteins were observed to be 97% identical, indicating that CR6 is an evolutionarily conserved protein. Analysis of CR6 expression during hematopoietic cell development associated with growth arrest and apoptotic cell death, upon exposure of hematopoietic cells to a variety of growth arrest and apoptotic stimuli, and in a variety of murine tissues, has revealed that CR6 expression differs significantly from the expression of the related MyD118 and Gadd45 genes. Nevertheless, CR6, like MyD118 and Gadd45, suppressed colony formation of human lung carcinoma H1299 cells. These data suggest that CR6 plays similar, but not identical, roles to MyD118 and Gadd45 in negative control of cell growth.
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Affiliation(s)
- W Zhang
- Fels Institute for Cancer Research and Molecular Biology, and Department of Biochemistry, Temple University School of Medicine, 3307 N. Broad St., Philadelphia, Pennsylvania PA 19140, USA
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Jairajpuri MA, Azam N, Baburaj K, Bulliraju E, Durani S. Charge and solvation effects in anion recognition centers: an inquiry exploiting reactive arginines. Biochemistry 1998; 37:10780-91. [PMID: 9692968 DOI: 10.1021/bi980058e] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
Following a long-standing suggestion of Riordan et al. [Riordan, J. F., McElvany, K. D., and Borders, C. L., Jr. (1977) Science 195, 884-885], we sought to exploit chemically activated arginines as probes to characterize the microenvironmental effects in enzymes that mediate the recognition of anionic substrates. A micellar simulation study establishes that octylguanidine (OGn) becomes chemically activated upon incorporation into both cetyltrimethylammonium bromide (CTAB) and Triton X-100 micelles and that the activations correlate with the pKa diminutions induced in its guanidinium group by the effects of electrostatic or nonelectrostatic nature as reflected in the results of pH and salt titration experiments. Next, a protein modification study establishes that the modifiable arginines in a number of enzymes also have diminished pKa's, again due to effects of electrostatic or nonelectrostatic nature as reflected in the results of pH and salt titration experiments. Warwicker's finite difference Poisson--Boltzmann algorithm [Warwicker, J. (1992) J. Mol. Biol. 223, 247-257] is applied to several of the enzymes with available crystal structure coordinates, and indeed, their chemically activated arginines are found to be in an electrostatic microenvironment that can diminish their pKa's, with the magnitudes of these diminutions matching closely the diminutions measured experimentally. Finally, the chemically activated arginines are examined with respect to their atomic atmosphere and are thus found to occur in a local microenvironment that would facilitate their roles as anion anchors. Thus, electrostatic and solvation effects are found to be critical determinants of the arginine role as an anion anchor.
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Affiliation(s)
- M A Jairajpuri
- Biotechnology Center, Indian Institute of Technology Bombay, Mumbai, India
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Abstract
Recombination by the Flp recombinase of Saccharomyces cerevisiae is known to be inhibited by heterology of the overlap regions of the two recombining DNA targets (FRT sites). We have used topological analysis to show that Flp can promote two rounds of intramolecular recombination between heterologous FRT sites contained within the same supercoiled plasmid. The products are in parental nonrecombinant configuration. Thus, heterology may appear to "block" recombination by rendering the heteroduplex recombinant products unstable, thus favoring a second round of recombination to homoduplex (but parental) products. Hence, homology in the core region is not a requirement for the recombination reaction by Flp but for the formation of recombinant products.
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Affiliation(s)
- N Azam
- Department of Medical Genetics and Microbiology, University of Toronto, Toronto, Ontario, Canada M5S 1A8
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Kotecha S, Chan B, Azam N, Silverman M, Shaw RJ. Increase in interleukin-8 and soluble intercellular adhesion molecule-1 in bronchoalveolar lavage fluid from premature infants who develop chronic lung disease. Arch Dis Child Fetal Neonatal Ed 1995; 72:F90-6. [PMID: 7712280 PMCID: PMC2528395 DOI: 10.1136/fn.72.2.f90] [Citation(s) in RCA: 134] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
Interleukin-8 (IL-8), soluble intercellular adhesion molecule-1 (sICAM), elastase and neutrophils were assessed in bronchoalveolar lavage fluid from nine infants who developed chronic lung disease (CLD) after respiratory distress syndrome (RDS), seven who had recovered from RDS, and in four control infants. IL-8, sICAM, elastase and neutrophils in bronchoalveolar lavage fluid were increased in the CLD group, the differences being most pronounced at 10 days of age. When babies with and without CLD were compared at 10 days of age, bronchoalveolar lavage fluid from the babies with CLD had significantly increased IL-8 (114.0 vs 12.7 ng/ml), sICAM (19.0 vs 1.1 micrograms/ml), elastase (6.9 vs 0.9 micrograms/ml) and neutrophils (1.9 vs 0.4 x 10(9)/l). In serum the increased concentration of IL-8 observed at birth in the CLD (247 pg/ml) and RDS (192 pg/ml) groups decreased over three weeks to the concentrations observed in the controls (< 70 pg/ml). Persistent inflammation could be a major contributory factor in the development of CLD.
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Affiliation(s)
- S Kotecha
- Department of Paediatrics and Neonatal Medicine, Royal Postgraduate Medical School, Hammersmith Hospital, London
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Baburaj K, Azam N, Udgaonkar D, Durani S. HOCGO and DMACGO. Two coumarin derived alpha-dicarbonyls suitable as pH and polarity sensitive fluorescent reporters for proteins that can be targeted at reactive arginines. Biochim Biophys Acta 1994; 1199:253-65. [PMID: 8161564 DOI: 10.1016/0304-4165(94)90004-3] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Abstract
Two coumarin derived alpha-dicarbonyls, HOCGO and DMACGO, are presented as pH, polarity and quencher sensitive fluorescent reporters for proteins that can be targeted at reactive arginines. Both inactivate a number of enzymes that feature functionally critical and chemically susceptible arginyls. Both are chemoselective in responding towards Arg side chain but not towards Cys or Lys side chains under suitably dilute conditions. With pKapp approximately 6.7, HOCGO can serve as a pH sensor, while with pKapp << 4.0, DMACGO is better suited as a polarity sensor. A contrasting set of changes are manifest in the CGOs upon protein interaction that are either attributable to Arg modification or to the noncovalent probe associations with hydrophobic protein domains. DMACGO probes a single hydrophobic site on ovalbumin while HOCGO is largely unresponsive to this protein. Three to five arginyls are modified in HSA and BSA by HOCGO as well as DMACGO, while the latter also probes two hydrophobic sites on both these proteins. HOCGO modifies a single arginine in LDH active site, while its adducts with H4 and M4LDH isozymes titrate to the apparent pKa of 7.8. Other proteins labeled with HOCGO or DMACGO reveal a number of variations that can furnish information about the microenvironment in the sites probed. The CGOs are thus potentially useful reporters of protein domains that feature reactive arginines. Suitable experimental condition are defined based on mechanistic considerations that may be used in applying the CGOs as Arg modifiers and as fluorescent probes.
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Affiliation(s)
- K Baburaj
- Biotechnology centre, Indian Institute of Technology, Bombay
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Houghton A, Egan S, Archinal G, Bradley O, Azam N. Selective medical examination at school entry: should we do it, and if so how? J Public Health Med 1992; 14:111-6. [PMID: 1515193] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
A prospective study was conducted on 82 consecutive 5+ examinations performed by four school doctors over a period of two months. The aim was to assess the impact of applying selection criteria for examination. Information gathered included immunization status, history of previous developmental assessments and previous detection of problems, and the result of the examination for each child. Forty-three per cent of children were up to date with their immunizations, 66 per cent had had a six-week check and 38 per cent and 17 per cent had been assessed at 15 months and 2 1/2 years respectively. Forty-eight problems were detected in 37 children (45 per cent), of which 27 had not been previously detected. Of these, 19 were detected by the school nurse before the examination as a result of hearing (nine) and vision (10) testing and measurement of height and weight (one). Of the remaining problems, four were presented by the parent, one by the teacher and two were detected by the school doctor. If a policy of selective examination had been in place in which children were called for examination only if they had never been assessed before, or where there were no records of a previous assessment, or if their immunizations were incomplete, or they had previous problems, or the school nurse or teacher or parent had expressed concern, all but four children would have been examined. It was concluded that this particular method of selection would be unproductive and that a system whereby the school nurse was responsible for screening and selection for examination would be preferable.(ABSTRACT TRUNCATED AT 250 WORDS)
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Affiliation(s)
- A Houghton
- City and Hackney Health Authority, London
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Baburaj K, Saeed A, Azam N, Durani S. Exploring borate-activated electron-rich glyoxals as the arginine-reactivity probes. The reactivities of functionally critical arginines in some representative enzymes. Biochim Biophys Acta 1991; 1078:258-64. [PMID: 2065093 DOI: 10.1016/0167-4838(91)90567-j] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
4-Substituted styrylglyoxals have been synthesized and found to benefit from borate catalysis to serve as highly reactive arginine modifiers. A study of the mechanism in arginine modification has affirmed: (i) the role of electronic effects in modulating the arginine reactivity in alpha-dicarbonyls, (ii) the intermediacy in the reaction of a reversible arginine-alpha-dicarbonyl complex and (iii) the identity of the nucleophilic attack at ketone as the rate determining step in the arginine reaction with arylglyoxals. 4-Methoxystyrylglyoxal and 4-(N,N-dimethylamino)phenylglyoxal were used as the probes in analyzing some representative enzymes for the reactivities of their susceptible arginyls. The susceptible arginyls in lactate and malate dehydrogenases were thus found to be appreciably reactive while those in carboxypeptidase-A and pyruvate kinase were only moderately reactive.
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Affiliation(s)
- K Baburaj
- Department of Chemistry, Indian Institute of Technology, Bombay
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