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Patel SA, Hassan MK, Naik M, Mohapatra N, Balan P, Korrapati PS, Dixit M. EEF1A2 promotes HIF1A mediated breast cancer angiogenesis in normoxia and participates in a positive feedback loop with HIF1A in hypoxia. Br J Cancer 2024; 130:184-200. [PMID: 38012382 PMCID: PMC10803557 DOI: 10.1038/s41416-023-02509-2] [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] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2023] [Revised: 11/13/2023] [Accepted: 11/14/2023] [Indexed: 11/29/2023] Open
Abstract
BACKGROUND The eukaryotic elongation factor, EEF1A2, has been identified as an oncogene in various solid tumors. Here, we have identified a novel function of EEF1A2 in angiogenesis. METHODS Chick chorioallantoic membrane, tubulogenesis, aortic ring, Matrigel plug, and skin wound healing assays established EEF1A2's role in angiogenesis. RESULT Higher EEF1A2 levels in breast cancer cells enhanced cell growth, movement, blood vessel function, and tubule formation in HUVECs, as confirmed by ex-ovo and in-vivo tests. The overexpression of EEF1A2 could be counteracted by Plitidepsin. Under normoxic conditions, EEF1A2 triggered HIF1A expression via ERK-Myc and mTOR signaling in TNBC and ER/PR positive cells. Hypoxia induced the expression of EEF1A2, leading to a positive feedback loop between EEF1A2 and HIF1A. Luciferase assay and EMSA confirmed HIF1A binding on the EEF1A2 promoter, which induced its transcription. RT-PCR and polysome profiling validated that EEF1A2 affected VEGF transcription and translation positively. This led to increased VEGF release from breast cancer cells, activating ERK and PI3K-AKT signaling in endothelial cells. Breast cancer tissues with elevated EEF1A2 showed higher microvessel density. CONCLUSION EEF1A2 exhibits angiogenic potential in both normoxic and hypoxic conditions, underscoring its dual role in promoting EMT and angiogenesis, rendering it a promising target for cancer therapy.
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Affiliation(s)
- Saket Awadhesbhai Patel
- National Institute of Science Education and Research, School of Biological Sciences, Bhubaneswar, 752050, Odisha, India
- Homi Bhabha National Institute, Training School Complex, Anushaktinagar, Mumbai, 400094, India
| | - Md Khurshidul Hassan
- National Institute of Science Education and Research, School of Biological Sciences, Bhubaneswar, 752050, Odisha, India
- Homi Bhabha National Institute, Training School Complex, Anushaktinagar, Mumbai, 400094, India
| | - Monali Naik
- National Institute of Science Education and Research, School of Biological Sciences, Bhubaneswar, 752050, Odisha, India
- Homi Bhabha National Institute, Training School Complex, Anushaktinagar, Mumbai, 400094, India
| | - Nachiketa Mohapatra
- Apollo Hospitals, Plot No. 251,Old Sainik School Road, Bhubaneswar, 750015, Odisha, India
| | - Poornima Balan
- CSIR-Central Leather Research Institute, Sardar Patel Road, Adyar, Chennai, 600020, India
| | - Purna Sai Korrapati
- CSIR-Central Leather Research Institute, Sardar Patel Road, Adyar, Chennai, 600020, India
| | - Manjusha Dixit
- National Institute of Science Education and Research, School of Biological Sciences, Bhubaneswar, 752050, Odisha, India.
- Homi Bhabha National Institute, Training School Complex, Anushaktinagar, Mumbai, 400094, India.
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Indrakumar J, Balan P, Murali P, Solaimuthu A, Vijayan AN, Korrapati PS. Applications of molybdenum oxide nanoparticles impregnated collagen scaffolds in wound therapeutics. J Trace Elem Med Biol 2022; 72:126983. [PMID: 35537228 DOI: 10.1016/j.jtemb.2022.126983] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/07/2021] [Revised: 02/10/2022] [Accepted: 04/07/2022] [Indexed: 10/18/2022]
Abstract
INTRODUCTION The highly complex pathophysiology of the wound micro-environment demands the development of a multi-faceted system which would enhance the wound healing cascade. Incorporation of nanotechnology in wound therapeutics has opened up new avenues to tourment the diseased condition. Amongst the various types of nanoparticles molybdenum oxide nanoparticles posses various inherent properties that makes it a versatile material to be used in healing. Incorporation of Molybdenum nanoparticles into collagen scaffolds would provide a synergistic and sequential healing process ensuring the formation of a fully functional tissue. MATERIALS AND METHODS The physico-chemical characterization of the synthesized materials were done using SEM and FT-IR techniques. The bicompatibility and cell proliferation were tested using HaCaT cell lines. Pro-angiogenic ability of the scaffold was tested using CAM assay and Chick aortic arch assay. Finally the in-vivo wound healing ability of the material was tested by creating wound of about 6 cm2 on the dorsal side of Wistar rats and observed for about 21 days. RESULTS The characterization of the scaffold revealed the presence MoO3 nanoparticles and their structural integrity within the scaffold. The synthesized MoO3-collagen nanocomposite was found to be biocompatible and hemocompatible. The in-vitro studies demonstrated that the MoO3-collagen scaffold significantly increased the cell adhesion and migration to nearly 2 fold. The MoO3 embedded collagen sheets synergistically favoured neovascularization and re-epithelization,which would potentially enhance therapeutic efficiency of the scaffold. The nanocomposite also encouraged results in in-vivo analysis, the Wistar rats treated with MoO3-collagen scaffolds showed complete healing in about 15 days. CONCLUSION The fabricated MoO3-collagen scaffold was found to play an important role in all major events of wound healing such as adhesion, migration, proliferation and angiogenesis. The in-vivo healing assay also proved that the healing rate of animals treated with the samples was comparatively faster. Further research using various trace elements would open up promising avenues in healing therapeutics.
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Affiliation(s)
- Janani Indrakumar
- Biological Materials Laboratory, CSIR-Central Leather Research Institute, Chennai 600020, India
| | - Poornima Balan
- Biological Materials Laboratory, CSIR-Central Leather Research Institute, Chennai 600020, India
| | - Padmaja Murali
- Biological Materials Laboratory, CSIR-Central Leather Research Institute, Chennai 600020, India
| | | | - Ane Nishitha Vijayan
- Biological Materials Laboratory, CSIR-Central Leather Research Institute, Chennai 600020, India
| | - Purna Sai Korrapati
- Biological Materials Laboratory, CSIR-Central Leather Research Institute, Chennai 600020, India.
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Tan JK, Balan P, Birbilis N, Manivasagam G. Corrosion-resistant Mg(OH)2/Mg-Fe layered double hydroxide (LDH) composite films on magnesium alloy WE43. J Taiwan Inst Chem Eng 2022. [DOI: 10.1016/j.jtice.2021.104169] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Ng E, Tay JRH, Balan P, Ong MMA, Bostanci N, Belibasakis GN, Seneviratne CJ. Metagenomic sequencing provides new insights into the subgingival bacteriome and aetiopathology of periodontitis. J Periodontal Res 2021; 56:205-218. [PMID: 33410172 DOI: 10.1111/jre.12811] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2020] [Revised: 07/29/2020] [Accepted: 09/30/2020] [Indexed: 12/17/2022]
Abstract
"Open-ended" molecular techniques such as 16S rRNA sequencing have revealed that the oral bacteriome of subgingival plaque is more diverse than originally thought. 16S rRNA analysis has demonstrated that constituents of the overall bacterial community are qualitatively similar in health and disease, differing mainly in their relative proportions with respect to each other. Species in low abundance can also act as critical species, leading to the concept of global community dysbiosis which relates to shifts in community structure, rather than shifts in membership. Correlation analysis suggests that coordinated interactions in the community are essential for incipient dysbiosis and disease pathogenesis. The subgingival bacteriome also provides biomarkers that are useful for disease detection and management. Combined with clinical and biological parameters, these may assist clinicians in developing and implementing effective treatment strategies to restore microbial homeostasis and monitor disease. Identification of higher risk groups or poor responders to treatment using unique subgingival bacteriome signatures may also lead to early intervention.
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Affiliation(s)
- Ethan Ng
- Department of Restorative Dentistry, National Dental Centre Singapore, Singapore, Singapore
| | - John R H Tay
- Department of Restorative Dentistry, National Dental Centre Singapore, Singapore, Singapore
| | - P Balan
- Singapore Oral Microbiomics Initiative, National Dental Research Institute Singapore, SingHealth, Singapore, Singapore
| | - Marianne M A Ong
- Department of Restorative Dentistry, National Dental Centre Singapore, Singapore, Singapore.,Oral Health Academic Clinical Programme, Duke-NUS Medical School, Singapore, Singapore
| | - Nagihan Bostanci
- Division of Oral Diseases, Department of Dental Medicine, Karolinska Institutet, Stockholm, Sweden
| | - Georgios N Belibasakis
- Division of Oral Diseases, Department of Dental Medicine, Karolinska Institutet, Stockholm, Sweden
| | - Chaminda J Seneviratne
- Singapore Oral Microbiomics Initiative, National Dental Research Institute Singapore, SingHealth, Singapore, Singapore.,Oral Health Academic Clinical Programme, Duke-NUS Medical School, Singapore, Singapore
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Balan P, Brandt BW, Chong YS, Crielaard W, Wong ML, Lopez V, He HG, Seneviratne CJ. Subgingival Microbiota during Healthy Pregnancy and Pregnancy Gingivitis. JDR Clin Trans Res 2020; 6:343-351. [PMID: 32777190 DOI: 10.1177/2380084420948779] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
INTRODUCTION Previous studies have largely explored the microbial composition and pathogenesis of pregnancy gingivitis. However, the patterns of microbial colonization during pregnancy in the absence of pregnancy gingivitis have rarely been studied. Characterization of the oral microbiome in pregnant women with healthy gingiva is an important initial step in understanding the role of the microbiome in progression to pregnancy gingivitis. OBJECTIVES In this study, we compared the oral microbiome of pregnant women without gingivitis (healthy pregnancy) with pregnant women having gingivitis and nonpregnant healthy women to understand how pregnancy modifies the oral microbiome and induces progression to pregnancy gingivitis. METHODS Subgingival plaque samples were collected from Chinese pregnant women with gingivitis (n = 10), healthy pregnant women (n = 10), and nonpregnant healthy women (n = 10). The Illumina MiSeq platform was used to perform 16S rRNA gene sequencing targeting the V4 region. RESULTS The alpha and beta diversity was significantly different between pregnant and nonpregnant women, but minimal differences were observed between pregnant women with and without gingivitis. Interestingly, the oral bacterial community showed higher abundance of pathogenic taxa during healthy pregnancy as compared with nonpregnant women despite similar gingival and plaque index scores. However, when compared with overt pregnancy gingivitis, pathogenic taxa were less abundant during healthy pregnancy. PICRUSt analysis (phylogenetic investigation of communities by reconstruction of unobserved states) also suggested no difference in the functional capabilities of the microbiome during pregnancy, irrespective of gingival disease status. However, metabolic pathways related to amino acid metabolism were significantly increased in healthy pregnant women as compared with nonpregnant women. CONCLUSION The presence of pathogenic taxa in healthy pregnancy and pregnancy gingivitis suggests that bacteria may be necessary for initiating disease development but progression to gingivitis may be influenced by the host environmental factors. More efforts are required to plan interventions aimed at sustaining health before the appearance of overt gingivitis. KNOWLEDGE TRANSFER STATEMENT The results of this study draw attention to the importance of oral health maintenance during pregnancy, as women without any prenatal oral conditions are predisposed to the risk of developing pregnancy gingivitis. Hence, it is important to incorporate comprehensive assessment of oral health in the prenatal health care schedules. Pregnant woman should be screened for oral risks, counseled on proper oral hygiene and expected oral changes, and referred for dental treatment, when necessary.
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Affiliation(s)
- P Balan
- Singapore Oral Microbiomics Inititative, National Dental Research Institute Singapore, SingHealth, Singapore.,Oral Health ACP, Duke NUS Medical School, Singapore
| | - B W Brandt
- Department of Preventive Dentistry, Academic Centre for Dentistry, Amsterdam, the Netherlands
| | - Y S Chong
- Department of Obstetrics and Gynaecology, Yong Loo Lin School of Medicine, National University Hospital, Singapore
| | - W Crielaard
- Department of Preventive Dentistry, Academic Centre for Dentistry, Amsterdam, the Netherlands
| | - M L Wong
- Discipline of Oral Sciences, Faculty of Dentistry, National University of Singapore, Singapore
| | - V Lopez
- School of Nursing, Hubei University of Medicine, Shiyan City, China
| | - H G He
- Alice Lee Centre for Nursing Studies, Yong Loo Lin School of Medicine, National University of Singapore, Singapore
| | - C J Seneviratne
- Singapore Oral Microbiomics Inititative, National Dental Research Institute Singapore, SingHealth, Singapore.,Oral Health ACP, Duke NUS Medical School, Singapore
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Balan P, Indrakumar J, Murali P, Korrapati PS. Bi-faceted delivery of phytochemicals through chitosan nanoparticles impregnated nanofibers for cancer therapeutics. Int J Biol Macromol 2020; 142:201-211. [DOI: 10.1016/j.ijbiomac.2019.09.093] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2019] [Revised: 09/05/2019] [Accepted: 09/12/2019] [Indexed: 12/17/2022]
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Hepp P, Hagenbeck C, Gilles J, Wolf OT, Goertz W, Janni W, Balan P, Fleisch M, Fehm T, Schaal NK. Effects of music intervention during caesarean section on anxiety and stress of the expectant mother – A prospective, controlled, randomized study. Geburtshilfe Frauenheilkd 2018. [DOI: 10.1055/s-0038-1671165] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022] Open
Affiliation(s)
- P Hepp
- Helios Universitätsklinikum Wuppertal, Landesfrauenklinik, Wuppertal, Deutschland
- Universitätsklinikum Düsseldorf, Frauenklinik, Düsseldorf, Deutschland
| | - C Hagenbeck
- Universitätsklinikum Düsseldorf, Frauenklinik, Düsseldorf, Deutschland
| | - J Gilles
- Universitätsklinikum Düsseldorf, Frauenklinik, Düsseldorf, Deutschland
| | - OT Wolf
- Ruhr-Universität Bochum, Department of Cognitive Psychology, Institute of Cognitive Neuroscience, Bochum, Deutschland
| | - W Goertz
- Universitätsklinikum Düsseldorf, Musikerambulanz, Düsseldorf, Deutschland
| | - W Janni
- Universitätsklinikum Ulm, Frauenklinik, Ulm, Deutschland
| | - P Balan
- Universitätsklinikum Düsseldorf, Frauenklinik, Düsseldorf, Deutschland
| | - M Fleisch
- Helios Universitätsklinikum Wuppertal, Landesfrauenklinik, Wuppertal, Deutschland
| | - T Fehm
- Universitätsklinikum Düsseldorf, Frauenklinik, Düsseldorf, Deutschland
| | - NK Schaal
- Heinrich-Heine- Universität Düsseldorf, Experimentelle Psychologie, Düsseldorf, Deutschland
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Kaleta T, Balan P, Krawczyk N, Fehm T, Bizjak G. Das venöse Nabelschnuraneurysma – eine Indikation zur Sectio? Geburtshilfe Frauenheilkd 2016. [DOI: 10.1055/s-0036-1593231] [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] Open
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Hagenbeck C, Märthesheimer S, Schaal N, Burghardt B, Stevens F, Kreuzer V, Gilles J, Balan P, Goertz W, Wolf OT, Fehm T, Hepp P. Musikbegleittherapie bei Sectio caesarea und ihre Auswirkungen auf Angst: eine Pilotstudie. Geburtshilfe Frauenheilkd 2016. [DOI: 10.1055/s-0036-1592880] [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] Open
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Balan P, Han KS, Lawley B, Moughan PJ. Orally administered ovine serum immunoglobulins modulate the intestinal levels of Lactobacillus and enterobacteria in the growing rat1. J Anim Sci 2013; 91:3724-32. [DOI: 10.2527/jas.2012-6028] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023] Open
Affiliation(s)
- P. Balan
- Riddet Institute, Massey University, Private Bag 11 222, Palmerston North, New Zealand
| | - K.-S. Han
- Department of Animal Resource, Sahmyook University, Seoul, 139-742, Korea
| | - B. Lawley
- Riddet Institute, Massey University, Private Bag 11 222, Palmerston North, New Zealand
- Department of Microbiology and Immunology, University of Otago, Dunedin, New Zealand
| | - P. J. Moughan
- Riddet Institute, Massey University, Private Bag 11 222, Palmerston North, New Zealand
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Balan P, Han KS, Dukkipati VSR, Moughan PJ. Recovery of intact IgG in the gastrointestinal tract of the growing rat following ingestion of an ovine serum immunoglobulin. J Anim Physiol Anim Nutr (Berl) 2013; 98:209-14. [PMID: 23441910 DOI: 10.1111/jpn.12060] [Citation(s) in RCA: 7] [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] [Received: 11/15/2012] [Accepted: 01/31/2013] [Indexed: 11/29/2022]
Abstract
The aim of this study was to determine whether orally ingested ovine serum IgG partly resists digestion in the growing rat. Fifteen Sprague-Dawley male rats were allocated to one of three diets for a 3-week study: a control diet (CON) and two test diets containing either freeze-dried ovine serum immunoglobulin (FDOI) or inactivated ovine serum immunoglobulin (IOI). Samples of stomach chyme and intestinal digesta from the ad libitum-fed rats were subjected to ELISA and Western blot analysis. Amounts of intact ovine IgG for the FDOI diet were found to be 13.9, 20.0, 34.1, 13.0 and 36.9 μg in the total wet digesta from the stomach chyme, duodenal, jejunal, ileal and colonic digesta respectively. Qualitative detection by Western blot revealed the presence of intact ovine serum IgG with a ~150 kDa MW. This was detected in all of the gut segments (stomach chyme, duodenal, jejunal, ileal and colonic digesta) for growing rats fed the FDOI diet. No ovine IgG was detected in the chyme or digesta from rats fed the CON or the IOI diets. Ovine serum IgG partly resisted digestion in the growing rat fed the FDOI diet and was found throughout the digestive tract. These results provide a basis to explain the reported biological effects of orally administered immunoglobulin.
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Affiliation(s)
- P Balan
- Riddet Institute, Massey University, Palmerston North, New Zealand
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Balan P. Ultrasonography, computed tomography and magnetic resonance imaging in the assessment of pelvic pathology. Eur J Radiol 2006; 58:147-55. [PMID: 16289430 DOI: 10.1016/j.ejrad.2005.10.002] [Citation(s) in RCA: 26] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2005] [Revised: 10/05/2005] [Accepted: 10/07/2005] [Indexed: 11/28/2022]
Abstract
OBJECTIVE Ultrasound (US) is the primary imaging modality in the investigation of pelvic pathology in women however it can be very inaccurate. MRI and CT provide a more detailed pelvic examination and hence we compared their accuracies with that of ultrasound to find out if these two modalities should be used more often. PATIENTS AND METHODS 136 women who had MRI examination of the pelvis for investigation of probable pelvic pathology were studied. Hundred and twenty-five of these women had an initial ultrasound scan and 23 had an initial CT. Diagnostic accuracy was assessed against histopathology or clinical follow-up. RESULTS Histopathology was available in 127/136 women. Overall 36% of the lesions were malignant. The overall accuracy of MRI, US and CT were 97%, 77% and 87%, respectively. MRI confidently identified the tissue of origin in 94% compared to only 66% for US. There was a significant difference in accuracy between MRI and US in diagnosing adnexal and uterine pathology. MRI was better than CT and US in diagnosing peritoneal metastases whereas CT was superior in diagnosing omental infiltration. CONCLUSION We suggest that all women with a pelvic abnormality identified on US or in whom there is a strong clinical suspicion of disease should undergo MR pelvic imaging in preference to CT because of its better soft tissue resolution and multi-planar capability.
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Affiliation(s)
- P Balan
- Centre for MRI, University of Hull and Hull and East Yorkshire NHS Trust, UK.
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Adámek J, Stöckel J, Hron M, Ryszawy J, Tichý M, Schrittwieser R, Ionită C, Balan P, Martines E, Oost GV. A novel approach to direct measurement of the plasma potential. ACTA ACUST UNITED AC 2004. [DOI: 10.1007/bf03166386] [Citation(s) in RCA: 40] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Abstract
To assess further the psychometric features of neuropsychological deficit screening (NDS), three groups of patients (41 demented, 23 not demented but cognitively impaired, and 50 controls) were examined and the results compared with two older tests, the Mattis dementia rating scale (MDRS) and the mini mental status test (MMST). As a result, the discriminating ability of NDS (modified for this study) was comparable to both other tests without surpassing them in either demented or cognitively impaired groups. An abbreviated version allowed for an improvement in economy without sacrificing discriminating properties. The advantage of NDS thus lies in the diversity of functions assessed, while its screening power is comparable to the two other tests used for comparison.
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Affiliation(s)
- C J G Lang
- Neurologische Klinik, Friedrich-Alexander-Universität Erlangen-Nürnberg.
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Abstract
Diagnostic hysteroscopy should be included routinely in the work-up of invasive examinations for infertility patients. Anyhow, one can rarely expect to find the definite underlying reason for infertility. In infertile patients about 20% of hysteroscopic examinations show some grade of intrauterine abnormalities. Congenital uterine malformations are the most frequently found disorders. In the group of patients with habitual abortions abnormalities are found much more often and can also be more often interpreted as the mainly underlying factor for the repeated abortions. Operative hysteroscopy has become the surgical method of first choice for the treatment of uterine septa, submucous myomas, polyps and synechia. After septum dissection results are excellent. Myoma removal also shows beneficial effects on fertility; nevertheless, cases are not too frequent among infertility patients. In cases of high-grade Asherman's syndrome, the prognosis after hysteroscopic surgery is still often poor.
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Affiliation(s)
- J Hucke
- Department of Obstetrics and Gynaecology, Krankenhaus Bethesda, Wuppertal, Germany
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Ceponiene R, Shestakova A, Balan P, Alku P, Yiaguchi K, Näätänen R. Children's auditory event-related potentials index sound complexity and "speechness". Int J Neurosci 2001; 109:245-60. [PMID: 11699331 DOI: 10.3109/00207450108986536] [Citation(s) in RCA: 61] [Impact Index Per Article: 2.7] [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: 11/13/2022]
Abstract
Children's long-latency auditory event-related potential (LLAEP) structure differs from that of adults. Functional significance of childhood ERP components is largely unknown. In order to look for the functional correlates in adult and children's LLAEPs, stimulus-complexity effects were investigated in 8-10-year old children. To this end, auditory ERPs to vowels, acoustically matched complex tones, and sinusoidal tones were recorded. All types of stimuli elicited P100-N250-N450 ERP complex. Differences between the sinusoidal and complex tones were confined to the P100 and N250 peaks, complex tones eliciting larger responses. Vowels elicited smaller-amplitude N250 but larger-amplitude N450 than the complex tones. Some stimulus-complexity effects observed for N250 in children corresponded to those observed for the N1 in adults, whereas the N450 peak exhibited behaviour resembling that of the adult ERP components subsequent to the N1 wave.
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Affiliation(s)
- R Ceponiene
- Cognitive Brain Research Unit, Dept. of Psychology, Meritullinkatu 1B, P. O. Box 13, University of Helsinki, 000 14 Helsinki, Finland
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De Bruyne F, Balan P. Current indications and technical aspects of hysterectomy in benign gynecological pathology. Der Gynäkologe 2000. [DOI: 10.1007/s001290050620] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Lang CJ, Majer M, Balan P, Reischies FM. Recall and recognition in Huntington's disease. Arch Clin Neuropsychol 2000; 15:361-71. [PMID: 14590232] [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: 04/27/2023] Open
Abstract
We assessed 19 patients with Huntington's disease (HD) at early to moderately advanced stages of their disease using memory tests that investigated verbal and visual recall and recognition. In those tests where identical material was subject to recall and recognition the standardized results (z scores) were lower for recognition. Performance was better with pictorial than with verbal material. While recognition bias and savings scores did not differ significantly from controls, all other recognition parameters did so. This is in contrast to the claim that defective retrieval in HD is greatly enhanced by multiple choice recognition. One major reason for maintaining this assumption was apparently the disregard of false-positive responses. Our results indicate that verbal and visual recognition are impaired in HD, and the notion of a salient deficit of free recall is not supported.
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Affiliation(s)
- C J Lang
- Neurological Hospital, University of Erlangen-Nuremberg, Erlangen, Germany.
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Balan P, Davis-Poynter N, Bell S, Atkinson H, Browne H, Minson T. An analysis of the in vitro and in vivo phenotypes of mutants of herpes simplex virus type 1 lacking glycoproteins gG, gE, gI or the putative gJ. J Gen Virol 1994; 75 ( Pt 6):1245-58. [PMID: 8207391 DOI: 10.1099/0022-1317-75-6-1245] [Citation(s) in RCA: 192] [Impact Index Per Article: 6.4] [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: 01/29/2023] Open
Abstract
Mutants of herpes simplex virus type 1 (HSV-1) lacking glycoproteins gG, gE, gI or the putative gJ were constructed by inserting a lacZ expression cassette within the US4, US8, US7 and US5 genes respectively. Revertant viruses were then constructed by rescue with a wild-type DNA fragment. Each of these mutant viruses, by comparison with the parental virus HSV-1 SC16, exhibited normal particle to infectivity ratios, and had no discernible phenotypic abnormalities in baby hamster kidney-21 cells following high or low multiplicity infections. Infection of mice by scarification of the ear with these mutant viruses showed the following. (i) Interruption of the US5 (gJ) gene has no effect on the ability of HSV-1 to multiply at the inoculation site or its ability to enter or multiply in the peripheral or central nervous system (CNS). This shows that the US5 gene provides a convenient site for the insertion of foreign genes for both in vitro and in vivo studies. (ii) Disruption of the US4 (gG) gene results in marginal attenuation in the mouse ear model. (iii) Disruption of the US7 (gI) or US8 (gE) genes results in pronounced attenuation; virus was rapidly cleared from the inoculation site and was barely detectable in sensory ganglia or in the CNS. The failure of gI-negative or gE-negative viruses to replicate efficiently at the inoculation site in vivo led to the investigation of virus behaviour in epithelial cells in vitro. Viruses lacking gE or gI adsorbed to and entered these cells at normal rates compared with the parental virus, but formed minute plaques. This is consistent with a failure of cell-to-cell spread by the cell contact route. This was confirmed by measurement of the rate of increase in infectious centre numbers following low multiplicity infections. The view that gE and gI influence interactions between cells at the plasma membrane was reinforced by showing that the introduction of disrupted gE or gI genes into a syncytial, but otherwise syngeneic, background resulted in a non-syncytial phenotype. We conclude that the gE-gI complex plays a part, at least in some cell types, in the interactions at the cell surface that allow transmission of the virus from infected to uninfected cells by cell contact. In syncytial strains this leads to uncontrolled membrane fusion.(ABSTRACT TRUNCATED AT 400 WORDS)
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Affiliation(s)
- P Balan
- Department of Pathology, University of Cambridge, U.K
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Suryakar AN, Ambekar JG, Balan P, Tiwaskar HV. Studies on lipid peroxide in chest diseases. J Indian Med Assoc 1983; 81:193-4. [PMID: 6678275] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
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Litomerický S, Izakovic V, Sluková J, Balan P, Vahancík A. [Werner's syndrome in two siblings (author's transl)]. BRATISL MED J 1981; 75:75-80. [PMID: 7214174] [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: 01/24/2023]
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