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1.
J Robot Surg ; 17(1): 125-129, 2023 Feb.
Article in English | MEDLINE | ID: mdl-35384594

ABSTRACT

The suspension of use of sub-urethral mesh in the UK in 2018 has seen the resurgence of colposuspension in female SUI surgery. Open and laparoscopic colposuspension techniques are well recognised. We present data from 28 robotic-assisted laparoscopic colposuspension (RALCp) procedures, reporting on technique, safety and efficacy. Approval was obtained from the hospital New and Novel Procedures Committee. All patients had urodynamic assessment prior to surgery. Data was prospectively gathered and 24-h pad usage and Urinary Incontinence Short Form Questionnaire (ICIQ-UI-SF) scores were used to assess symptom severity and quality of life. PGII scores were used to assess patient satisfaction after the procedure. Paired T test analysis was conducted. Since May 2019, robotic colposuspension has been performed in 28 patients. The mean age and BMI were 49 and 27 (kg/m2), respectively, with a mean follow-up period of 12 months. 67.9% of patients had pure urodynamic SUI and 32.1% of patients had previous anti-SUI surgery. Average operating time was 127 min, blood loss 20 ml and length of stay 2 days. There was a significant 73% improvement in mean 24-h pad usage (p = 0.001) and an improvement in mean ICIQ-UI-SF scores from 18.1 to 9.4 (p = 0.0001). Day 1 mean pain score was 5/10. This is the largest series of its kind. Robotic colposuspension is safe and feasible with significant improvements seen in quality of life scores and number of pads used per day. It presents a minimally invasive treatment option in female SUI, however needs larger volume evaluation and longer follow-up for further evaluation.


Subject(s)
Laparoscopy , Robotic Surgical Procedures , Urinary Incontinence, Stress , Urinary Incontinence , Humans , Female , Urinary Incontinence, Stress/surgery , Quality of Life , Robotic Surgical Procedures/methods , Urinary Incontinence/surgery , Laparoscopy/methods , Treatment Outcome
2.
Eur Rev Med Pharmacol Sci ; 26(6): 1803-1808, 2022 03.
Article in English | MEDLINE | ID: mdl-35363326

ABSTRACT

OBJECTIVE: According to WHO, global coverage of immunization was 86% in 2019, which dropped to 83% in 2020. The objective of this study is to assess parental knowledge and identify their perception towards the importance of child immunization. This study has also tried to determine the possible influencing factors for parental decision-making towards child immunization. PATIENTS AND METHODS: A community-based cross-sectional study was conducted in 2020 in Sudair region of Saudi Arabia. The study was done among parents residing in Sudair region, where the sample was randomly selected based on the household. The sample of 436 was taken using the population proportion formula. Data were collected and analyzed using SPSS version 18 (SPSS Inc., Chicago, IL, USA). Both the descriptive and inferential statistics were used to draw the results. RESULTS: In this study the three-fourth (77.1%) of respondents were female and the remaining were male (23%). The majority of the respondent's knowledge was reported to have some form of influence on their idea of immunization followed by Ministry of Health, family members, medical staff, social media and others. A significant association was seen between age, marital status, occupational status and parents' knowledge on the importance of immunization (thinking if all child immunization was important). Association was also seen between parents' perception that immunization causes serious side effects and the age of the respondents. CONCLUSIONS: The specific programs and bcc materials are needed to enhance the knowledge and perception of individuals regarding the need for complete immunization and also regarding the fact of vaccine-preventable diseases.


Subject(s)
Health Knowledge, Attitudes, Practice , Immunization , Child , Cross-Sectional Studies , Female , Humans , Male , Parents , Perception , Saudi Arabia
3.
Perspect Public Health ; 141(6): 328-337, 2021 Nov.
Article in English | MEDLINE | ID: mdl-34816775

ABSTRACT

AIMS: There are a growing number of organisations working to address the connections between climate change and health. This article introduces the concept of 'theories of change' - the methodology by which organisations or movements hope to bring about social change - and applies it to the current climate change and health movement in England. Through movement mapping, the article describes and offers reflections on the climate change and health ecosystems in England. METHODS: Organisations working on climate change and health in England were identified and publicly available information was collated to map movement characteristics, target stakeholders and methodologies deployed, using an inductive, iterative approach. RESULTS: A total of 98 organisations working on health and climate change (and/or sustainability) were initially identified, of which 70 met the inclusion criteria. Most organisations target two or more stakeholders, with healthcare workers, management structures, and government being most commonly cited. Methodological approaches identified include Formal education programmes; Awareness-raising; Purchasing-procurement power; Advocacy; Financial; Media-messaging; Networking; Knowledge generation; and Policy making, of which education, awareness-raising, and advocacy are most commonly used. CONCLUSION: There is a tendency for climate change and health organisations in England to focus on individual level and sectoral change over system change. More could be made of the potential for the healthcare professions' voice and messaging for the wider climate movement. Given the rapid boom of climate change and health organisations in recent years, a mind-set shift that recognises different players as part of a cohesive ecosystem with better coordination and collaboration may reduce unnecessary work, and facilitate more cohesive outcomes.


Subject(s)
Climate Change , Ecosystem , England , Health Personnel , Humans
4.
J Appl Microbiol ; 126(6): 1657-1667, 2019 Jun.
Article in English | MEDLINE | ID: mdl-30825355

ABSTRACT

AIMS: This paper presents the potential of environmentally sourced bacteriophages to affect the growth of clinical isolates of Pseudomonas aeruginosa biofilms, and assesses the respective plaque morphotypes presented by each bacteriophage, in vitro. METHODS AND RESULTS: Bacterial host strains were typed for their ability to produce the quorum sensing-controlled virulence factor pyocyanin, and then tested for bacteriophage susceptibility using the spot test method. The bacteriophages were co-administered with ciprofloxacin in order to determine whether the bacteriophages would demonstrate synergistic or antagonistic behaviour to the antibiotic in vitro. Results suggest a potential relationship between the bacteriophage plaque size and biofilm inhibition, where those producing smaller plaques appear to be more effective at reducing bacterial biofilm formation. CONCLUSIONS: This phenomenon may be explained by a high adsorption rate leading to the rapid formation of smaller plaques, and greater biofilm reduction associated with the loss of viable bacterial cells before the cells can adhere to the surface and form a biofilm. Results from the co-administration of bacteriophage and ciprofloxacin suggest that the two work synergistically to affect P. aeruginosa biofilms. SIGNIFICANCE AND IMPACT OF THE STUDY: The data indicate enhanced efficacy of ciprofloxacin by ≥50%. This could offer an alternative strategy for targeting antibiotic-resistant infections.


Subject(s)
Anti-Bacterial Agents/pharmacology , Bacteriophages/physiology , Biofilms/drug effects , Pseudomonas aeruginosa/drug effects , Biofilms/growth & development , Ciprofloxacin/pharmacology , Drug Resistance, Bacterial , Drug Synergism , Environmental Microbiology , Pseudomonas Infections/microbiology , Pseudomonas aeruginosa/growth & development , Pseudomonas aeruginosa/pathogenicity , Pseudomonas aeruginosa/virology , Pyocyanine/genetics , Quorum Sensing/drug effects , Virulence Factors/genetics
5.
Pathologe ; 37(5): 465-72, 2016 Sep.
Article in German | MEDLINE | ID: mdl-27350133

ABSTRACT

BACKGROUND: Diagnostic problems of thyroid cytology are frequently discussed, but relevance and causes of discrepant cytological and histological diagnoses are rarely studied in detail. OBJECTIVES: Investigation of causes and relevance of discrepant diagnoses. MATERIALS AND METHOD: The analysis includes 297 patients who had thyroid resection after prior fine needle aspiration (FNA) and is based on the cytological and histological reports. In special cases, cytological and histological specimens were re-examined. RESULTS: Malignant tumors were found in 45 patients (15.1 %). In 5 patients the cytological diagnosis was "false negative". Three of these 5 tumors were papillary carcinomas (PTC) of ≤10 mm, one an obviously nonmalignant papillary proliferation of the thyroidal epithelium and one a malignant lymphoma complicating autoimmune thyreoiditis (AIT). In 11 of the 35 patients with a FNA diagnosis "suspicious of malignancy" or "malignant," 1 AIT, 4 goiter nodules, and 6 adenomas were diagnosed histologically. However, since distinct nuclear atypia was found in three of five false positive diagnoses, there still remains doubt in their benignity. CONCLUSIONS: Carcinomas of ≤10 mm incidentally detected in the resected thyroid tissue may not be relevant to the patient and do not reduce the high negative predictive value of FNA. The final diagnosis on the resected tissue should include the cytological findings. Discrepant findings should be commented in the report to the clinician.


Subject(s)
Biopsy, Fine-Needle , Thyroid Diseases/pathology , Thyroid Neoplasms/pathology , Adult , False Negative Reactions , False Positive Reactions , Goiter, Nodular/pathology , Humans , Lymphoma/pathology , Retrospective Studies , Thyroid Gland/pathology , Thyroidectomy , Thyroiditis, Autoimmune/pathology
6.
Encephale ; 42(2): 172-6, 2016 Apr.
Article in French | MEDLINE | ID: mdl-26850214

ABSTRACT

BACKGROUND: Rheumatoid arthritis (RA) is a chronic inflammatory degenerative disease whose symptoms are mainly joint with significant functional impact, resulting in a restriction of the activities of the patient and increasing the impact on mental well-being. Several studies have been conducted to explore psychiatric disorders comorbid with RA. OBJECTIVE: The objective of this review is to present the various psychiatric manifestations of RA reported in the medical literature. METHODS: A literature review was conducted using the Pubmed search with the following keywords: psychiatry, psychiatric manifestations, rheumatoid arthritis. Three hundred and sixty-one articles were reviewed for relevance and 47 references were selected. RESULTS: Among the major psychiatric disorders found in RA, the anxiety and depressive disorders are prevalent (13 to 48% of patients), as well as suicide, insomnia and tiredness. The impairment of quality of life is markedly after age 65. The association between RA and schizophrenia seems negative so that factors predisposing one is protective for the other. CONCLUSION: Comorbid psychiatric disorders with RA are prevalent and may increase the impairment of quality of life for patients. The detection and treatment of psychiatric disorders improve the care of patients with RA.


Subject(s)
Arthritis, Rheumatoid/complications , Arthritis, Rheumatoid/psychology , Mental Disorders/etiology , Mental Disorders/psychology , Anxiety/epidemiology , Anxiety/etiology , Anxiety/psychology , Comorbidity , Depressive Disorder/epidemiology , Depressive Disorder/etiology , Depressive Disorder/psychology , Humans
7.
Traffic Inj Prev ; 15(1): 18-24, 2014.
Article in English | MEDLINE | ID: mdl-24279962

ABSTRACT

OBJECTIVE: This study assessed roadside and bedside factors associated with early mortality following motor vehicle trauma. METHODS: This retrospective cohort study evaluated motor vehicle crashes in Orange County Florida in 2009 that became medical examiner cases. Data from the Department of Highway Safety and Motor Vehicles (DHSMV), emergency medical services (EMS), a level I trauma center, and the medical examiner were integrated for the analysis. The primary outcome measure was early death, defined by death within 48 hours of a motor vehicle trauma. Both traditional and nontraditional predictors of early mortality were assessed. RESULTS: The most significant factors associated with early mortality were as follows: (1) From autopsy: hemothorax (odds ratio [OR] = 8.26, 95% confidence interval [CI]: 1.83-37.3) and liver injury (OR = 4.26, 95% CI: 1.70-15.6); (2) from hospital data: systolic blood pressure (OR = 0.98, 95% CI: 0.96-0.99) and having cardiopulmonary resuscitation (CPR) performed in the emergency department (OR = 13.4, 95% CI: 1.51-118.72); and (3) from DHSMV: involvement of drugs and/or alcohol (OR = 4.27, 95% CI: 1.33-13.6), total fatalities (OR = 6.07, 95% CI: 1.57-23.5), speed of vehicle (OR = 1.06, 95% CI: 1.02-1.09), and number of lanes at the crash scene (OR = 1.58, 95% CI: 1.13-2.20). CONCLUSION: These results were made possible by integrating 4 distinct data sources. As future research in traffic-related injury moves toward prevention, it will be critical to evaluate new preventative strategies quickly and effectively. A unique number that is both patient and event specific that could be incorporated into each of these databases would make such integration seamless. Successful methods for linking data collected by the multiple agencies involved in motor vehicle collisions will ultimately provide invaluable information for medical personnel, researchers, engineers, planners, and policy makers at the local, state, and national levels to identify safety priorities to reduce crash-related injuries and fatalities.


Subject(s)
Accidents, Traffic/statistics & numerical data , Data Collection/methods , Interinstitutional Relations , Wounds and Injuries/epidemiology , Adolescent , Adult , Aged , Aged, 80 and over , Child , Child, Preschool , Coroners and Medical Examiners , Emergency Medical Services , Female , Florida/epidemiology , Government Agencies , Humans , Infant , Male , Middle Aged , Retrospective Studies , Trauma Centers , Wounds and Injuries/mortality , Young Adult
8.
Ann R Coll Surg Engl ; 95(3): 200-6, 2013 Apr.
Article in English | MEDLINE | ID: mdl-23827292

ABSTRACT

INTRODUCTION: The implementation of enhanced recovery programmes (ERPs) in colorectal surgery has seen improvements in the length of inpatient stay with no increase in complications. We investigated the role of ERP in radical cystectomy at our institution. METHODS: Prospective data were collected from 26 consecutive patients prior to the introduction of the ERP and 51 patients who underwent open radical cystectomy within an ERP. Individuals in the ERP cohort did not receive bowel preparation or nasogastric drainage but received preoperative carbohydrate drinks, perioperative epidural analgesia and immediate mobilisation on day 1. Primary outcome measures included duration of intensive care unit (ICU) stay and length of hospital stay. Secondary outcome measures included the time to the passage of flatus and faeces, and time to mobilisation. Other measures that were analysed included operation time and complications. RESULTS: Baseline characteristics for both groups were similar. The median length of hospital stay fell from 11.5 days to 10.4 days and the mean ICU stay dropped from 2.4 days to 1.0 days (p=0.01). Time to removal of nasogastric tube, and time to passage of flatus and faeces were significantly shorter in the ERP group, as was the time to full oral diet. Clavien complication rates and 30-day mortality rates were similar in both groups. There were no readmissions. CONCLUSIONS: ERP in radical cystectomy is safe and not associated with any increase in complications or readmissions. It is associated with reductions in ICU stay, and could also reduce length of hospital stay and duration of postoperative ileus.


Subject(s)
Cystectomy/rehabilitation , Urinary Bladder Neoplasms/surgery , Adult , Aged , Aged, 80 and over , Critical Care , Early Ambulation , Female , Humans , Length of Stay , Male , Middle Aged , Neoplasm Recurrence, Local/etiology , Postoperative Complications/etiology , Prospective Studies , Urinary Bladder Neoplasms/rehabilitation
9.
Int J Cosmet Sci ; 30(4): 271-6, 2008 Aug.
Article in English | MEDLINE | ID: mdl-18713073

ABSTRACT

Arbutus andrachne L. is widely distributed in Jordan. Tyrosinase is the key enzyme in the biosynthesis of melanin. This preliminary study was carried out to assess the possible anti-tyrosinase activity of A. andrachne extracts. Arbutin, hydroquinone and kojic acid were selected as inhibitor standards. Five different extracts (chloroform, butanol, ethanol, methanol and water) were prepared from A. andrachne stems and their activities were compared with the selected tyrosinase inhibitors. IC(50) was measured for both, standard and plant extracts. Among the different extracts, the methanolic extract exhibited the highest anttyrosinase activity with an IC(50) value (1 mg mL(-1)). Furthermore, 9 mg A. andrachne methanolic extract showed 97.49% inhibition of tyrosinase activity. Arbutin, hydroquinone, beta-sitosterol and ursolic acid were identified in the different extracts of A. andrachne by thin layer chromatography (TLC) and isolated by preparative TLC from the methanolic and chloroform stem extracts, respectively.


Subject(s)
Ericaceae/chemistry , Peptides/pharmacology , Plant Extracts/pharmacology , Arbutin/pharmacology , Hydroquinones/pharmacology , Inhibitory Concentration 50 , Plant Stems/chemistry , Pyrones/pharmacology , Tyrosine/metabolism
10.
Article in English | MEDLINE | ID: mdl-17292663

ABSTRACT

Rare earth complexes of 5-(phenylazo)-8-hydroxyquinoline (HL) of composition [M(L)(2)X.H(2)O] [where M=La, Ce, Pr, Nd and X=NO(3)(-) or NCS(-)] have been prepared and characterized on the basis of their chemical analyses, (1)H NMR, magnetic measurements, conductance, and visible and IR spectral data. Composition, conductance and IR spectral data of the complexes show that the HL acts as a bidentate monobasic ligand. The visible spectra of Pr(3+) and Nd(3+) show characteristic f-f transitions, and the nephelauxetic effect (1-beta) of these transitions has been evaluated. These data indicate the weak involvement of the 4f orbitals in complex formation.


Subject(s)
Azo Compounds/chemistry , Hydroxyquinolines/chemistry , Magnetic Resonance Spectroscopy/methods , Metals, Rare Earth/chemistry , Azo Compounds/analysis , Dimerization , Electric Conductivity , Electrons , Hydroxyquinolines/analysis , Ligands , Magnetics , Models, Chemical , Models, Molecular , Molecular Conformation , Oxygen/chemistry , Polymers/chemistry , Spectrophotometry, Infrared/methods , Stereoisomerism
11.
Eur Respir J ; 27(4): 705-13, 2006 Apr.
Article in English | MEDLINE | ID: mdl-16455839

ABSTRACT

Particulate air pollution is associated with respiratory morbidity and has cytotoxic and pro-inflammatory effects. The effects of diesel exhaust particles (DEP) on proliferation and apoptosis of A549 lung epithelial cells were examined. When deprived of serum (serum starvation), epithelial cell numbers fell, but DEP (5-200 microg.mL-1) prevented this. Using flow cytometric analysis of propidium iodide (PI) staining, DEP (10 microg.mL-1) increased cells in the S phase of cell cycle from 12.85 to 18.75% after 48 h, reversing serum starvation-induced G0/1 arrest. DEP also reduced the increase in apoptotic cells, as defined by double expression of annexin V/PI, observed after serum starvation (from 28.35 to 15.46%). The antioxidants, N-acetylcysteine (NAC; 33 mM) and AEOL10113 (10-100 microM), the N-terminal c-jun kinase inhibitor, SP600125 (33 microM), and nuclear factor-kappaB inhibitor, SN50 (33 microM), inhibited DEP-induced cell number increase. NAC inhibited DEP-induced reduction of G0/1 and increase in cells in the S and G2/M phases. Expression of p21CIP1/WAF1 mRNA and protein seen with serum starvation was reduced by DEP. In conclusion, diesel exhaust particles prevented serum starvation-led decreases in A549 epithelial cells by inducing cell cycle progression and preventing apoptosis, processes involving oxidative stress, inhibition of p21CIP1/WAF1 expression and stimulation of N-terminal c-jun kinase and nuclear factor-kappaB. Therefore, low-dose diesel exhaust particle exposure may lead to lung epithelial cell hyperplasia.


Subject(s)
Apoptosis/physiology , Cell Division/physiology , Epithelial Cells/physiology , Pneumonia/physiopathology , Respiratory Mucosa/physiology , Vehicle Emissions/toxicity , Cell Count , Cell Cycle/physiology , Cyclin E/metabolism , Cyclin-Dependent Kinase 2/metabolism , Cyclin-Dependent Kinase Inhibitor p21/genetics , Gene Expression , Humans , NF-kappa B/physiology , Oxidative Stress/physiology , Particle Size , RNA, Messenger/genetics
12.
Dev Biol ; 283(2): 357-72, 2005 Jul 15.
Article in English | MEDLINE | ID: mdl-15936751

ABSTRACT

The Hedgehog signaling pathway is critical for a significant number of developmental patterning events. In this study, we focus on the defects in pharyngeal arch and cardiovascular patterning present in Sonic hedgehog (Shh) null mouse embryos. Our data indicate that, in the absence of Shh, there is general failure of the pharyngeal arch development leading to cardiac and craniofacial defects. The cardiac phenotype results from arch artery and outflow tract patterning defects, as well as abnormal development of migratory neural crest cells (NCCs). The constellation of cardiovascular defects resembles a severe form of the human birth defect syndrome tetralogy of Fallot with complete pulmonary artery atresia. Previous studies have demonstrated a role for Shh in NCC survival and proliferation at later stages of development. Our data suggest that SHH signaling does not act directly on NCCs as a survival factor, but rather acts to restrict the domains that NCCs can populate during early stages (e8.5-10.5) of cardiovascular and craniofacial development.


Subject(s)
Arteries/embryology , Body Patterning , Neural Crest/embryology , Trans-Activators/genetics , Animals , Branchial Region/embryology , Cell Death , Cell Proliferation , Endoderm/physiology , Female , Heart/embryology , Hedgehog Proteins , Intracellular Signaling Peptides and Proteins , Male , Membrane Proteins/biosynthesis , Mice , Mice, Knockout , Neural Crest/cytology , Neural Crest/metabolism , Patched Receptors , Receptors, Cell Surface , Signal Transduction
13.
Dis Esophagus ; 17(3): 270-2, 2004.
Article in English | MEDLINE | ID: mdl-15361104

ABSTRACT

As the life expectancy of AIDS patients continues to increase due to improved anti-retroviral therapy less of these patients die of HIV-related illnesses. Dysphagia is a common complaint in AIDS patients and usually results from a fungal esophagitis. While cancer of the esophagus is occasionally found in AIDS patients, we report our experience with an AIDS patient diagnosed with a squamous cell esophageal malignancy who received pre-operative radiation and chemotherapy, followed by transhiatal esophagectomy. The patient is alive 16 months post-operatively. The transition of HIV/AIDS from an acute fulminant disease to a chronic condition mandates that these patients should receive full and standard therapy for their esophageal malignancies.


Subject(s)
Acquired Immunodeficiency Syndrome , Carcinoma, Squamous Cell/therapy , Deglutition Disorders/surgery , Esophageal Neoplasms/therapy , Esophagectomy , Aged , Carcinoma, Squamous Cell/diagnosis , Deglutition Disorders/etiology , Esophageal Neoplasms/diagnosis , Humans , Male
14.
Spectrochim Acta A Mol Biomol Spectrosc ; 58(3): 493-500, 2002 Feb.
Article in English | MEDLINE | ID: mdl-11905534

ABSTRACT

The interaction of 2-amino-4,6-dimethyl pyrimidine (ADMP) with beta-cyclodextrin (beta-CD) has been studied by means of UV absorption, steady state and time resolved fluorescence techniques. Spectral characteristics, bandwidths and photophysical parameters indicating that ADMP experience two different environments in aqueous solutions: bulk water and 1:1 (ADMP:beta-CD) inclusion complexation. The size restriction of the upper rim of beta-CD partially include ADMP and prevent the possibility of formation of 1:2 complex. The effective polarity of the cyclodextrin cavity experienced by the induced ADMP is equivalent with the polarity of an 80:20 methanol-water mixture.


Subject(s)
Cyclodextrins/chemistry , Pyrimidines/chemistry , Spectrophotometry/methods , beta-Cyclodextrins , Hydrogen Bonding , Kinetics , Models, Chemical , Models, Molecular , Protein Binding , Temperature , Time Factors , Ultraviolet Rays
15.
Talanta ; 58(2): 289-300, 2002 Aug 23.
Article in English | MEDLINE | ID: mdl-18968753

ABSTRACT

The complexes formed between IE11 and Cd(II), Cr(III), Cu(II), Mn(II) and Pb(II) were identified and confirmed by IR, UV and pH-metric titration. The uptake behavior of porous silica modified with N-propylsalicylaldimine (IE11) and these metal ions were studied. Log k(d) was found to be within the range 2.19-5.16 depending on pH and time of stirring. IE11 was used in the separation and preconcentration of Cd(II), Cr(III, VI), Cu(II), Mn(II, VII) and Pb(II) from some natural water samples. Data were compared with those obtained by the solvent extraction method APDC/MIBK. The proposed methodology allows to verify an improvement in the water quality of Nile River probably attributed to high to moderate floods in the last few years. The method was found to be accurate and not subject to random error, i.e. precise.

16.
J Pharm Biomed Anal ; 26(4): 593-8, 2001 Nov.
Article in English | MEDLINE | ID: mdl-11516910

ABSTRACT

The controlled adsorptive accumulation of Zn(II)-terfenadine complex (1:1) onto a hanging mercury drop electrode (HMDE) provides the basis for determination of the antihistamine drug terfenadine by differential pulse cathodic adsorptive stripping voltammetry. The adsorbed Zn(II)-terfenadine complex (1:1) at the HMDE developed a stripping voltammetry peak at more negative potential than that of the free Zn(II) ions. The peak current was used for the determination of terfenadine in pharmaceutical formulation and human plasma in 0.1 mol l(-1) sodium perchlorate solution under the optimized conditions (E(acc), -0.5 V; t(acc) 360 s; scan rate, 5 mV s(-1) and pulse height 100 mV). The developed peak current (i(p)) showed a linear dependence with terfenadine concentration within the range of 6 x 10(-8) - 9 x 10(-7) mol l(-1). The recoveries were found 98.97-99.35%, 99.72-99.02% and 100.58-101.08% with the R.S.D. 0.16-0.27%, 0.25-0.82% and 0.44-1.14% in authentic form, pharmaceutical formulations and human plasma, respectively. The detection limits were 0.4505 and 0.6115 ng ml(-1) terfenadine in pharmaceutical formulations and human plasma, respectively.


Subject(s)
Histamine H1 Antagonists/blood , Technology, Pharmaceutical , Terfenadine/blood , Chemistry, Pharmaceutical , Humans
17.
Gastroenterology ; 121(3): 685-98, 2001 Sep.
Article in English | MEDLINE | ID: mdl-11522753

ABSTRACT

BACKGROUND & AIMS: Hepatic stellate cells (HSCs) play a pivotal role in liver fibrosis and stimulating their apoptosis could be an effective treatment for liver fibrosis. METHODS: Activated HSCs, hepatocytes, and rats with liver fibrosis were treated with gliotoxin. RESULTS: Addition of gliotoxin to activated (alpha-smooth muscle actin positive) rat and human HSCs resulted in morphologic alterations typical of apoptosis. Within 2-3 hours of incubation, caspase 3 activity was markedly induced and caspase inhibitor 1 (Z-VAD-FMK)-sensitive oligonucleosome-length DNA fragments were detectable by gel electrophoresis of low molecular weight DNA. Apoptosis was widespread as judged by fluorescence-activated cell sorter analysis and terminal deoxynucleotidyl transferase-mediated deoxyuridine triphosphate nick-end labeling staining in both rat and human HSCs at concentrations that had no effect on the viability of rat hepatocytes. Gliotoxin treatment significantly reduced the number of activated stellate cells and mean thickness of bridging fibrotic septae in livers from rats treated with carbon tetrachloride. CONCLUSIONS: These data demonstrate proof-of-concept that by up-regulating HSC apoptosis, the extent of fibrosis can be decreased in inflammatory liver injury.


Subject(s)
Apoptosis/drug effects , Gliotoxin/pharmacology , Immunosuppressive Agents/pharmacology , Liver Cirrhosis/drug therapy , Liver/pathology , Animals , Anti-Allergic Agents/pharmacology , Calcium/metabolism , Carbon Tetrachloride , Chlorpromazine/pharmacology , Collagen/analysis , Cycloheximide/pharmacology , Disease Models, Animal , Dopamine Antagonists/pharmacology , Gliotoxin/chemistry , Humans , Immunosuppressive Agents/chemistry , In Situ Nick-End Labeling , In Vitro Techniques , Liver/chemistry , Liver Cirrhosis/chemically induced , Liver Cirrhosis/pathology , Male , Methapyrilene/pharmacology , Mitochondria/metabolism , NF-kappa B/metabolism , Protein Synthesis Inhibitors/pharmacology , Rats , Rats, Sprague-Dawley , Tumor Necrosis Factor-alpha/pharmacology
18.
Gut ; 48(4): 548-57, 2001 Apr.
Article in English | MEDLINE | ID: mdl-11247901

ABSTRACT

BACKGROUND: Activated hepatic stellate cells (HSC) are central to the pathogenesis of liver fibrosis, both as a source of fibrillar collagens that characterise fibrosis and matrix degrading metalloproteinases and their tissue inhibitors, the TIMPs. AIMS: To test the hypothesis that HSC apoptosis is critical to recovery from biliary fibrosis and that soluble growth factors may regulate HSC survival and apoptosis. METHODS: Rats (n=15) were subjected to bile duct ligation for 21 days, after which biliodigestive anastomosis was undertaken (n=13). Livers were harvested at fixed time points of recovery for periods of up to 42 days. Numbers of activated HSCs were quantified after alpha smooth muscle actin staining and HSC apoptosis was detected by terminal UDP-nick end labelling (TUNEL) staining and quantified at each time point. HSC apoptosis was quantified in vitro in the presence or absence of insulin-like growth factor (IGF)-1, IGF-2, platelet derived growth factor (PDGF), and transforming growth factor beta1 (TGF-beta1). RESULTS: Following biliodigestive anastomosis after 21 days of bile duct ligation, rat liver demonstrated a progressive resolution of biliary fibrosis over 42 days, associated with a fivefold decrease in activated HSC determined by alpha smooth muscle actin staining. TUNEL staining indicated that loss of activated HSC resulted from an increase in the rate of apoptosis during the first two days post biliodigestive anastomosis. Serum deprivation and culture in the presence of 50 microM cycloheximide was associated with an increase in HSC apoptosis which was significantly inhibited by addition of 10 ng/ml and 100 ng/ml IGF-1, respectively (0.05>p, n=5). In contrast, 1 and 10 ng/ml of TGF-beta1 caused a significant increase in HSC apoptosis compared with serum free controls (p<0.05, n=4). PDGF and IGF-2 were neutral with respect to their effect on HSC apoptosis. CONCLUSION: HSC apoptosis plays a critical role in the spontaneous recovery from biliary fibrosis. Both survival and apoptosis of HSC are regulated by growth factors expressed during fibrotic liver injury.


Subject(s)
Apoptosis/physiology , Growth Substances/physiology , Hepatocytes/physiology , Liver Cirrhosis, Biliary/pathology , Animals , Apoptosis/drug effects , Cell Count , Cycloheximide/pharmacology , Hepatocytes/drug effects , In Situ Nick-End Labeling , Insulin-Like Growth Factor I/physiology , Insulin-Like Growth Factor II/physiology , Male , Platelet-Derived Growth Factor/physiology , Rats , Rats, Sprague-Dawley , Transforming Growth Factor beta/physiology
19.
Am J Pathol ; 156(4): 1235-43, 2000 Apr.
Article in English | MEDLINE | ID: mdl-10751349

ABSTRACT

We have examined the expression of p75, a member of the TNF receptor superfamily in hepatic stellate cells (HSC) and pancreatic stellate cells (PSC). Activated HSC and PSC were demonstrated by Western blot analysis to express p75. p75 was immunolocalized to cells with a myofibroblast-like morphology in the fibrotic bands of six fibrotic and cirrhotic liver biopsies and three biopsies of fibrotic human pancreas. Immunostaining of parallel sections indicated that these cells were alpha-smooth muscle actin-positive, identifying them as activated HSC and PSC, respectively. HSC apoptosis in tissue culture in the presence of serum was quantified after addition of 0.1 to 100 ng/ml of nerve growth factor (NGF) a ligand for p75, by in situ counting of apoptotic bodies after addition of acridine orange. HSC demonstrated a significant increase in apoptosis in response to 100 ng/ml NGF (0.05 > P by Wilcoxon's rank; n = 7) after 24 hours. NGF 100 ng/ml had no effect on HSC proliferation, but reduced total HSC DNA by 19% relative to control after 24 hours (n = 3). These data demonstrate that activated HSC express p75 and respond to NGF stimulation by undergoing apoptosis. We therefore report p75 as a novel marker of activated HSC and suggest that signaling via ligand binding to p75 may provide a mechanism for selective apoptosis of HSC.


Subject(s)
Apoptosis/physiology , Liver/drug effects , Liver/physiology , Nerve Growth Factor/pharmacology , Receptor, Nerve Growth Factor/metabolism , Animals , Binding, Competitive , Cells, Cultured , Fibrosis , Humans , Liver/cytology , Liver/metabolism , Liver Cirrhosis/metabolism , Liver Cirrhosis/pathology , Liver Cirrhosis, Experimental/metabolism , Liver Cirrhosis, Experimental/pathology , Pancreas/cytology , Pancreas/metabolism , Pancreas/pathology , Rats , Recombinant Proteins/pharmacology , Reference Values
20.
J Egypt Soc Parasitol ; 29(2): 431-49, 1999 Aug.
Article in English | MEDLINE | ID: mdl-10605495

ABSTRACT

Sixty cases ranging in age between 18-30 years old, 50 of them were suffering from schistosomiasis haematobium, they were selected from in- and out-patient clinic of Theodor Bilharz Research Institute. Patients were divided into three groups, 20 infected and not treated, 20 infected and treated then exposed again to infection and 10 were completely treated. The authors have a fourth group to serve healthy control. Blood samples were collected to count eosinophil percentage and absolute eosinophil count. Urine samples were collected to 1-study eosinophiluria by slide film staining with Leishman's stain, and 2- to count number of ova excreted in 10 ml urine by urine filtration technique. Eosinophila and eosinophiluria > 5% were considered as a diagnostic value for schistosomiasis haematobium as well as it correlation between them and intensity of infection by number of ova in urine.


Subject(s)
Eosinophilia , Schistosomiasis haematobia/diagnosis , Adolescent , Adult , Animals , Eosinophils , Female , Humans , Male , Parasite Egg Count , Schistosoma haematobium/isolation & purification , Urine/cytology , Urine/parasitology
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