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1.
Tijdschr Psychiatr ; 64(2): 108-111, 2022.
Article in Dutch | MEDLINE | ID: mdl-35420154

ABSTRACT

When a child or adolescent is admitted to a High & Intensive Care (HIC) unit for adolescents, this implies that they find themselves in a severe psychiatric crisis. The work policy aiming autonomy and recovery is a vision that has been implemented in the treatment method at the HIC unit for adolescents. This policy focuses on the recovery of young people, in which learning to understand their own story and learning taking responsibility, are essential components. Sharing these experiences from doctors and patients aims to increase knowledge about this policy. The consistent implementation of this vision and method will result in high-quality care, more recovery and reduction of urge and coercive interventions. Calls are made for a broad-based implementation of a work policy aiming autonomy and recovery in the Netherlands.


Subject(s)
Adolescent Psychiatry , Mental Disorders , Adolescent , Child , Coercion , Hospitalization , Humans , Mental Disorders/therapy , Policy
2.
Urologe A ; 56(6): 779-784, 2017 Jun.
Article in German | MEDLINE | ID: mdl-28144694

ABSTRACT

BACKGROUND: Increasing antibiotic resistance is a current and severe problem in medicine, especially in urology. Multidisciplinary antibiotic stewardship programmes are an important approach to counteract increasing resistance rates. This approach includes collaboration between urologists and microbiologists. OBJECTIVES: The primary endpoint was to describe the current setting of interdisciplinary work of urologists and microbiologists in university hospitals in Germany. The secondary endpoints were the identification of problems of this interdisciplinary approach in daily routine and implications for the future in patient treatment. MATERIALS AND METHODS: A newly developed, 24-item questionnaire was sent to 34 German microbiology departments at medical universities between June and October 2016; the departments were contacted up to four times. Only complete questionnaires were included in our analysis. RESULTS: The response rate was 50.0%. In the majority of the urological cases a microbiologist was only contacted sporadically and asked for advice, but on the other hand most of the microbiologists think that this contact and discussion about the patient is reasonable and preferable. Of the respondents, 82.4% think that with a consequent interdisciplinary approach there might be lower antibiotic resistance rates in the future. One essential problem of ideal microbial diagnostics and therapeutic advice is that the microbiologist does not receive all relevant information upon request. This might be the case in up to 76.5%. Other problems are of economic nature or shortage of manpower. CONCLUSION: Interdisciplinary patient care between urologists and microbiologists is reasonable and preferable. This approach has the potential of decreasing antibiotic resistance rates in the future.


Subject(s)
Academic Medical Centers/statistics & numerical data , Attitude of Health Personnel , Health Care Surveys , Microbiology/statistics & numerical data , Patient Care Team/statistics & numerical data , Urinary Tract Infections/therapy , Adult , Female , Germany/epidemiology , Humans , Male , Middle Aged , Physicians/statistics & numerical data , Urinary Tract Infections/epidemiology
3.
Urologe A ; 55(8): 1038-46, 2016 Aug.
Article in German | MEDLINE | ID: mdl-27411997

ABSTRACT

BACKGROUND: With increasing life expectancy, progressive demographic change and decreasing societal stigmatization of incontinence urologists and gynaecologists are increasingly faced with urogynaecological challenges. To date however, urogynaecology is a poorly standardized area of expertise in both disciplines. Therefore, the urogynaecology training, especially in Germany, is very heterogeneous and requires evaluation as well as improvement. MATERIALS AND METHODS: The GeSRU-Academics research group "Functional urology and LUTS" evaluated this subject nationwide among urological and gynecological trainees and their chief physicians by using a comprehensive questionnaire (34/38 multiple-choice items) between April 2015 and May 2016. RESULTS: 336 urological residents and 190 chief physicians as well as 171 gynaecological residents and 175 chief physicians participated in the survey. Of all trainees, 70.0 % stated a personal interest in urogynaecology, but 45.4 % (gynaecological residents) and 52.9 % (urological residents) mention not to receive a standardized training in their own department. The chief physicians' survey resulted in discrepancies concerning the same question, <10 % of all residents do not receive a standardized urogynaecological training from their point of view. However, standardized urogynaecological training is of importance for those chief physicians. CONCLUSIONS: There is a discrepancy between expectations and reality of urogynaecological education and training. To enable a well-structured and standardized urogynaecological education and training, it is compulsory to focus on an interdisciplinary cooperation and to promote multidisciplinary development. A broad-based, well-designed training network and curricula should be established and used consistently.


Subject(s)
Education, Medical/statistics & numerical data , Gynecology/education , Needs Assessment/statistics & numerical data , Urology/education , Adult , Aged , Attitude of Health Personnel , Education, Medical/trends , Germany , Humans , Male , Middle Aged , Workforce
5.
Urologe A ; 54(12): 1811-20; quiz 1821-2, 2015 Dec.
Article in German | MEDLINE | ID: mdl-26704284

ABSTRACT

Over the last decade there has been a 25% decrease in the mortality rates for prostate cancer. The reasons for this significant decrease are most likely associated with the application of urological screening tests. The main tools for early detection are currently increased public awareness of the disease, prostate-specific antigen (PSA) tests and transrectal ultrasound (TRUS) guided topographically assignable biopsy sampling. Together with the histopathological results these features provide essential information for risk stratification, diagnostics and therapy decisions. The evolution of prostate biopsy techniques as well as the use of PSA testing has led to an increased identification of asymptomatic men, where further clarification is necessary. Significant efforts and increased clinical research focus on determining the appropriate indications for a prostate biopsy and the optimal technique to achieve better detection rates. The most widely used imaging modality for the prostate is TRUS; however, there are no clearly defined standards for the clinical approach for each individual biopsy procedure, dealing with continuous technical optimization and in particular the developments in imaging. In this review the current principles, techniques, new approaches and instrumentation of prostate biopsy imaging control are presented within the framework of the structured educational approach.


Subject(s)
Diagnostic Tests, Routine/standards , Early Detection of Cancer/standards , Endoscopic Ultrasound-Guided Fine Needle Aspiration/standards , Image Enhancement/standards , Practice Guidelines as Topic , Prostatic Neoplasms/pathology , Germany , Humans , Male , Patient Positioning/standards , Urology/standards
6.
World J Urol ; 31(1): 183-7, 2013 Feb.
Article in English | MEDLINE | ID: mdl-22885617

ABSTRACT

INTRODUCTION AND OBJECTIVE: Fluoroscopy time influences radiation exposure of both surgeons and patients during endourological interventions. Changes in fluoroscopy habits of endourological surgeons after being informed about their fluoroscopy times were evaluated depending on their endourological experience. MATERIALS AND METHODS: From April 2010 to April 2011, 402 endourological interventions in 337 Patients were assessed. Evaluated interventions were ureter stent placement (USP), ureter stent change (USC) nephrostomy change (NC), ureterorenoscopy (URS) and percutaneous nephrolithotomy (PCNL). Fluoroscopy time (FT) and operation time (OT) were recorded. For USP, USC and NC, the surgeons were divided into two groups: group I with >2 years of endourological experience and group II with <2 years experience. URS and PCNL only were performed by experienced surgeons. After 6 months, all surgeons were informed about their mean detected results. Both groups were compared, and changes in FT and OT in the second part of the study were analysed. RESULTS: Surgeons reduced their median fluoroscopy times up to 55 % after being informed about their fluoroscopy manners. Experienced surgeons reduced both operation and fluoroscopy times significantly for USP, USC and NC. For URS and PCNL, and OT and FT, the differences were not statistically significant. Inexperienced surgeons were not able to reduce both OT and FT significantly. CONCLUSION: If experienced surgeons are informed about their fluoroscopy time during endourological interventions, fluoroscopy times can be reduced significantly in easy procedures, which leads to less radiation exposure of surgeons and patients. Inexperienced surgeons have less possibility to influence their fluoroscopy manners.


Subject(s)
Endoscopy/statistics & numerical data , Fluoroscopy , Radiation Injuries/prevention & control , Urologic Surgical Procedures/standards , Clinical Competence , Female , Fluoroscopy/adverse effects , Fluoroscopy/statistics & numerical data , Humans , Male , Operative Time , Time Factors
7.
Urologe A ; 51(1): 81-98, 2012 Jan.
Article in German | MEDLINE | ID: mdl-22258380

ABSTRACT

Ultrasound is of great importance in the diagnosis of acute and chronic diseases in urology, such as kidney colic, testicular torsion, low-grade kidney trauma or for follow-up of vesicoureteral reflux, evaluation of infertility, measurement of residual urinary volume and the detection of cancer. An ultrasound examination is time and cost-effective without exposure to ionizing radiation and is routinely performed by practitioners as well as in the clinical daily routine. With technical innovations, such as contrast-enhanced ultrasound or real time elastography, it would for instance be possible to extend the application field of ultrasound. However, in some fields of investigation ultrasound still lacks accuracy and despite its many advantages the validity of ultrasound findings sometimes has to be verified with computed tomography (CT) or magnetic resonance imaging (MRI).


Subject(s)
Diagnostic Techniques, Urological/trends , Ultrasonography/trends , Urologic Diseases/diagnostic imaging , Urology/trends , Germany , Humans
8.
Urologe A ; 49(8): 963-75, 2010 Aug.
Article in German | MEDLINE | ID: mdl-20628865

ABSTRACT

Prostate cancer is the most common malignancy of men with approximately 32,000 new cases of prostate cancer in Germany and approximately 11,000 men who would die of the disease each year. For early diagnosis of prostate cancer PSA testing is used, whereas at present screening cannot be recommended due to the lack of confirmed medical and economic benefits. Regarding the imaging modalities, ultrasound of the prostate, currently performed in combination with elastography and histoscanning, magnetic resonance imaging of the prostate in combination with endorectal coils and positron emission tomography combined with computed tomography (PET-CT) are the methods of choice. Using these methods benign prostatitis can be differentiated from prostate cancer and staging of the tumor can be accomplished. On the other hand using these imaging methods it is possible to define the dominant intraprostatic lesion with different sensitivities and specificities, which is important for minimally invasive therapeutic strategies.


Subject(s)
Diagnostic Imaging/methods , Diagnostic Imaging/trends , Image Enhancement/methods , Prostatic Neoplasms/diagnosis , Humans , Male
9.
Aktuelle Urol ; 41(1): 35-42, 2010 Jan.
Article in German | MEDLINE | ID: mdl-20101785

ABSTRACT

The diagnostic methods in radiology and nuclear medicine for the imaging of prostate cancer as well as for the detection of locoregional recurrent disease and positive lymph nodes have progressed dramatically over the past years. Regarding technical advances in magnetic resonance imaging (MRI) and the new tracers used in nuclear medicine, an increase in sensitivity up to 85-90% and in specificity up to 75-90% has been achieved. Especially in MRI, efforts had been made to implement multiparametric imaging using the diagnostic methods of spectroscopy and diffusion-weighted sequences and by including dynamic contrast enhancement studies. In addition, by the use of dedicated, lymph-node specific contrast media, "ultrasmall paramagnetic iron particles" (USPIO), up to 100% of all pathological lymph nodes were detected in the published studies. Also in the field of nuclear medicine there have been relevant advances such as the development of specific tracer substances, which can be coupled to 18fluorine, a nuclide that is characterised by a longer half-life time than 11C and is therefore usable even in sites without an in-house cyclotron. Using this nuclide, the sensitivity and specificity rates in the detection of primary prostate cancer as well as in locoregional recurrences have been increased to values between 85 and 95%.


Subject(s)
Diffusion Magnetic Resonance Imaging , Image Processing, Computer-Assisted , Magnetic Resonance Imaging , Neoplasm Recurrence, Local/diagnosis , Positron-Emission Tomography , Prostatic Neoplasms/diagnosis , Tomography, X-Ray Computed , Bone Neoplasms/diagnosis , Bone Neoplasms/pathology , Bone Neoplasms/secondary , Carbon Radioisotopes , Diagnosis, Differential , Fluorine Radioisotopes , Humans , Lymph Nodes/pathology , Male , Neoplasm Invasiveness , Neoplasm Recurrence, Local/pathology , Neoplasm Recurrence, Local/surgery , Neoplasm Staging , Prognosis , Prostate/pathology , Prostatectomy , Prostatic Neoplasms/pathology , Prostatic Neoplasms/surgery , Prostatitis/diagnosis , Prostatitis/pathology
10.
Prostate Cancer Prostatic Dis ; 13(2): 182-5, 2010 Jun.
Article in English | MEDLINE | ID: mdl-20029401

ABSTRACT

When offering watchful waiting or active monitoring protocols to prostate cancer (PCa) patients, differentiation between Gleason scores (GS) 6 and 7 at biopsy is important. However, upgrading after prostatectomy is common. We investigated the impact of different PSA levels on misclassification in the PSA range of 2-3.9 and 4-10 ng ml(-1). A total of 448 patients with GS 6 PCa on prostate biopsy were evaluated by comparing biopsy and prostatectomy GS. Possible over diagnosis was defined as GS <7, pathological stage pT2a and negative surgical margins, and possible under diagnosis was defined as pT3a or greater, or positive surgical margins; the percentage of over- or under diagnosis was determined for correctly and upgraded tumors after prostatectomy. A match between biopsy and prostatectomy GS was found in 210 patients (46.9%). Patients in the PSA range of 2.0-3.9 and 4.0-10.0 ng ml(-1) were upgraded in 32.6 and 44.0%, respectively. Over diagnosis was more common than under diagnosis (23.2% vs 15.6%). When upgraded there was a significant increase in under diagnosis. As almost 40% of GS 6 tumors on biopsy are GS 7 or higher after surgery with a significant rise in under diagnosis there is a risk of misclassification and subsequent delayed or even insufficient treatment, when relying on favorable biopsy GS.


Subject(s)
Diagnostic Errors , Prostate-Specific Antigen/blood , Prostatic Neoplasms/pathology , Adult , Aged , Biopsy , Humans , Male , Middle Aged , Neoplasm Staging/methods , Prostatectomy , Prostatic Neoplasms/diagnosis , Prostatic Neoplasms/surgery
11.
J Pediatr Urol ; 4(1): 20-6, 2008 Feb.
Article in English | MEDLINE | ID: mdl-18631887

ABSTRACT

OBJECTIVES: Endoscopic therapy for vesicoureteral reflux (VUR) using dextranomer/hyaluronic acid (Dx/HA) has become increasingly popular, but the subjective impact of this therapy and subsequent reflux resolution on health-related quality of life (HRQoL) remains unclear. The aim of this study was to address this issue. MATERIALS AND METHODS: One hundred children (65 girls, 35 boys; mean age 4.46 years) cured of primary VUR by endoscopic treatment were retrospectively reviewed. The Glasgow children's benefit inventory (GCBI) - a validated, reproducible, post-interventional questionnaire consisting of four subscales - supplemented by sociodemographic and disease-specific questions was employed. The HRQoL benefit was calculated on a scale ranging from -100 (complete failure) to +100 (complete success) and correlated with supplementary data. RESULTS: Total response rate was 88%. Mean total GCBI score was 28.4+/-20.3 representing a significant HRQoL amelioration. All GCBI subscores improved with the physical health subscale being most relevant. A gender-specific, significant difference in relative GCBI scores was discovered. Correlation with critical life events and time since operation proved the positive effect on HRQoL to be durable. CONCLUSIONS: Resolution of primary VUR secondary to Dx/HA treatment significantly improves HRQoL. HRQoL is positively affected in many areas and not only in those directly associated with VUR. These improvements are not temporary, suggesting that successful Dx/HA therapy may be superior to medical management in terms of children's quality of life.


Subject(s)
Dextrans/therapeutic use , Endoscopy , Hyaluronic Acid/therapeutic use , Quality of Life , Vesico-Ureteral Reflux/surgery , Antibiotic Prophylaxis , Child , Child, Preschool , Female , Humans , Male , Pilot Projects , Retrospective Studies , Surveys and Questionnaires , Treatment Outcome
12.
J Urol ; 180(2): 694-700, 2008 Aug.
Article in English | MEDLINE | ID: mdl-18554644

ABSTRACT

PURPOSE: Vesicoureteral reflux is caused by a defective valve mechanism of the ureterovesical junction. Previous studies have revealed structural and metabolic changes in the intravesical ureter, impairing its contractile properties. Smooth musculature and nerves are replaced by collagen, while matrix degrading enzymes are over expressed. We investigated the presence of regulating cytokines and the extracellular matrix composition to elucidate further the pathophysiology of vesicoureteral reflux. MATERIALS AND METHODS: Ureteral endings were obtained from 28 children during antireflux surgery, and 14 age matched autopsy specimens served as controls. Routine histological sections were immunostained for insulin-like growth factor-1, nerve growth factor, transforming growth factor-beta1, tumor necrosis factor-alpha and vascular endothelial growth factor. Smooth muscle staining was supplemented by tenascin C, tetranectin and fibronectin detection. Staining patterns were investigated using computer assisted, high power field magnification analyses. RESULTS: Tumor necrosis factor-alpha and transforming growth factor-beta1 were significantly more abundant in vesicoureteral reflux samples, whereas insulin-like growth factor-1, nerve growth factor and vascular endothelial growth factor were more prevalent in healthy controls. Fibronectin was intensely expressed in refluxing ureters, while it was scarce in healthy children. Tenascin C was notable within the urothelium of both groups. Only vesicoureteral reflux samples displayed tenascin C in the musculature and connective tissue. Tetranectin staining was only detected in vesicoureteral reflux. CONCLUSIONS: Several cytokines are differentially expressed in primary refluxing ureters, indicating an ongoing tissue remodeling process in the ureterovesical junction region. Additionally, the smooth muscle coat is widely lacking, while extracellular matrix proteins typical for tissue shrinkage and reorganization are over expressed. These alterations are likely to contribute to the malfunctioning active ureteral valve mechanism in primary vesicoureteral reflux.


Subject(s)
Cytokines/metabolism , Extracellular Matrix/pathology , Muscle, Smooth/pathology , Vesico-Ureteral Reflux/metabolism , Vesico-Ureteral Reflux/pathology , Biomarkers/metabolism , Biopsy, Needle , Case-Control Studies , Child, Preschool , Extracellular Matrix/metabolism , Extracellular Space , Female , Humans , Immunohistochemistry , Infant , Intercellular Junctions/pathology , Male , Muscle Contraction/physiology , Risk Factors , Sensitivity and Specificity , Severity of Illness Index , Somatomedins/metabolism , Transforming Growth Factor beta1/metabolism , Ureteroscopy , Urothelium/metabolism , Urothelium/pathology , Vascular Endothelial Growth Factor A/metabolism
13.
Food Chem Toxicol ; 45(12): 2581-91, 2007 Dec.
Article in English | MEDLINE | ID: mdl-17766022

ABSTRACT

Food irradiation has been considered as a safe processing technology to improve food safety and preservation, eliminating efficiently bacterial pathogens, parasites and insects. This study aims to characterize the toxicological potential of 2-alkylcyclobutanones (2-ACBs), radiolytic derivatives of triglycerides, formed uniquely upon irradiation of fat-containing food. In irradiated food they are generated proportionally to fat content and absorbed radiation dose. The cyto- and genotoxic potentials of various highly pure synthetic 2-ACBs were studied in bacteria and human cell lines. While pronounced cytotoxicity was evident in bacteria, no mutagenic activity has been revealed by the Ames test in Salmonella strains TA 97, TA 98 and TA 100. In mammalian cells genotoxicity was demonstrated mainly by the induction of DNA base lesions recognized by the Fpg protein as determined by both the Comet Assay and the Alkaline Unwinding procedure. Formation of DNA strand breaks was observed by the Alkaline Unwinding procedure but not by the Comet Assay. The extent of cytotoxicity and genotoxicity were dependent on chain length and degree of unsaturation of the fatty acid chain. Further studies will have to clarify mechanisms of action and potential relevance for human exposure situation.


Subject(s)
Cyclobutanes/toxicity , Food Irradiation , Cell Line, Tumor/drug effects , Cyclobutanes/administration & dosage , DNA Damage , Dose-Response Relationship, Drug , Humans , Mutagenicity Tests , Salmonella/drug effects , Salmonella/genetics
14.
Int J Gynecol Cancer ; 16(4): 1522-8, 2006.
Article in English | MEDLINE | ID: mdl-16884360

ABSTRACT

We have previously shown that interferon-gamma 1b (IFN-gamma) in combination with cyclophosphamide and cisplatin significantly prolongs progression-free survival in ovarian cancer. In this phase I/II study, we examined if administration of IFN-gamma is also safe in combination with the current standard treatment, paclitaxel and carboplatin. Thirty-four patients with newly diagnosed advanced epithelial ovarian cancer, FIGO stage III/IV, were treated for six to nine cycles with paclitaxel (175 mg/m(2)) and carboplatin (area under the curve [AUC] 5) every 3 weeks. IFN-gamma was administered in an escalating dose from 6 days/cycle with 0.025 mg sc up to 9 days/cycle with 0.1 mg sc. As expected, administration of IFN-gamma was associated with flu-like symptoms. Grade 3/4 neutropenia was observed in 74% (25 out of 34) of patients. Other side effects, in particular peripheral neuropathies, were within the previously observed ranges for the paclitaxel plus carboplatin combination. Overall response rate (complete or partial response) in patients who received either six or nine doses (0.1 mg) of IFN-gamma/cycle (n = 28) was 71%. IFN-gamma is safe in combination with carboplatin and paclitaxel for first-line treatment of patients with advanced ovarian cancer. This combination should be further evaluated as an immunotherapeutic treatment option for ovarian cancer.


Subject(s)
Antineoplastic Combined Chemotherapy Protocols/therapeutic use , Ovarian Neoplasms/drug therapy , Adenocarcinoma, Mucinous/drug therapy , Adenocarcinoma, Mucinous/pathology , Adult , Aged , Carboplatin/administration & dosage , Cystadenocarcinoma, Serous/drug therapy , Cystadenocarcinoma, Serous/pathology , Disease-Free Survival , Endometrial Neoplasms/drug therapy , Endometrial Neoplasms/pathology , Female , Humans , Interferon-gamma/administration & dosage , Middle Aged , Neoplasm Staging , Ovarian Neoplasms/mortality , Paclitaxel/administration & dosage , Survival Rate , Treatment Outcome
15.
Diabetologia ; 48(4): 784-9, 2005 Apr.
Article in English | MEDLINE | ID: mdl-15756540

ABSTRACT

AIMS/HYPOTHESIS: The aim of this study was to evaluate the relationship between benign prostatic hyperplasia (BPH) and arteriosclerosis shown in a model of type 2 diabetes in a trans-sectional population study using contrast-enhanced colour Doppler ultrasound for exact assessment of prostatic blood flow. METHODS: Contrast-enhanced transrectal colour Doppler ultrasound was performed using a microbubble-based ultrasound enhancer SonoVue for evaluating prostate vascularity (transitional zone [TZ] and peripheral zone [PZ]) in diabetic BPH patients, non-diabetic BPH patients and healthy subjects. Computer-assisted quantification of colour pixel intensity (CPI) was used to objectively evaluate the prostate vascularity. Resistive index measurements were obtained in the TZ and the PZ. Findings were compared between these three groups. RESULTS: TZ-CPI was significantly lower in diabetic patients than in non-diabetic BPH men (p=0.001), whereas the CPI of the PZ showed no difference between these two groups (p=0.978). TZ-CPI of patients with diabetic and non-diabetic BPH were significantly lower than in controls (p<0.001), but no difference was found between diabetic and healthy patients in the PZ (p=0.022) and borderline significance was seen when comparing patients of the BPH group with the control patients (p=0.019). Resistive index values of the TZ in diabetic patients showed significantly higher values (p<0.001) than the BPH and control groups. CONCLUSIONS/INTERPRETATION: The significantly lower CPI and higher resistive index values of the TZ in diabetic patients compared with patients with non-diabetic BPH and healthy subjects indicate considerable vascular damage in the TZ of these patients. Diabetic vascular damage may cause hypoxia and may contribute to the pathogenesis of BPH.


Subject(s)
Diabetes Mellitus, Type 2/complications , Diabetic Angiopathies/complications , Prostatic Hyperplasia/etiology , Adult , Aged , Arteries/pathology , Arteriosclerosis/complications , Arteriosclerosis/pathology , Blood Pressure/physiology , Cross-Sectional Studies , Diabetic Angiopathies/etiology , Diabetic Angiopathies/pathology , Humans , Image Processing, Computer-Assisted , Male , Middle Aged , Prostate/blood supply , Prostate/pathology , Prostatic Hyperplasia/pathology , Prostatic Hyperplasia/physiopathology , Regional Blood Flow/physiology , Risk Factors , Ultrasonography, Doppler, Color
16.
Environ Health Perspect ; 110 Suppl 5: 797-9, 2002 Oct.
Article in English | MEDLINE | ID: mdl-12426134

ABSTRACT

Nickel, cadmium, cobalt, and arsenic compounds are well-known carcinogens to humans and experimental animals. Even though their DNA-damaging potentials are rather weak, they interfere with the nucleotide and base excision repair at low, noncytotoxic concentrations. For example, both water-soluble Ni(II) and particulate black NiO greatly reduced the repair of DNA adducts induced by benzo[a]pyrene, an important environmental pollutant. Furthermore, Ni(II), As(III), and Co(II) interfered with cell cycle progression and cell cycle control in response to ultraviolet C radiation. As potential molecular targets, interactions with so-called zinc finger proteins involved in DNA repair and/or DNA damage signaling were investigated. We observed an inactivation of the bacterial formamidopyrimidine-DNA glycosylase (Fpg), the mammalian xeroderma pigmentosum group A protein (XPA), and the poly(adenosine diphosphate-ribose)polymerase (PARP). Although all proteins were inhibited by Cd(II) and Cu(II), XPA and PARP but not Fpg were inhibited by Co(II) and Ni(II). As(III) deserves special attention, as it inactivated only PARP, but did so at very low concentrations starting from 10 nM. Because DNA is permanently damaged by endogenous and environmental factors, functioning processing of DNA lesions is an important prerequisite for maintaining genomic integrity; its inactivation by metal compounds may therefore constitute an important mechanism of metal-related carcinogenicity.


Subject(s)
Cell Cycle/drug effects , DNA Repair , Metals, Heavy/adverse effects , Zinc Fingers , Animals , DNA-Binding Proteins/pharmacology , DNA-Formamidopyrimidine Glycosylase , Humans , N-Glycosyl Hydrolases/pharmacology , Poly(ADP-ribose) Polymerases/pharmacology , Xeroderma Pigmentosum Group A Protein
17.
Food Chem Toxicol ; 40(8): 1179-84, 2002 Aug.
Article in English | MEDLINE | ID: mdl-12067581

ABSTRACT

Metal ions are essential components of biological systems; nevertheless, even essential elements may have toxic or carcinogenic properties. Thus, besides As(III) and Cd(II), also Ni(II) and Co(II) have been shown previously to disturb different types of DNA repair systems at low, non-cytotoxic concentrations. Since some metals exert high affinities for SH groups, we investigated whether zinc finger structures in DNA-binding motifs of DNA repair proteins are potential targets for toxic metal ions. The bacterial formamidopyrimidine-DNA glycosylase (Fpg protein) involved in base excision repair was inhibited by Cd(II), Cu(II) and Hg(II) with increasing efficiencies, whereas Co(II), As(III), Pb(II) and Ni(II) had no effect. Furthermore, Cd(II) still disturbed enzyme function when bound to metallothionein. Strong inhibition was also observed in the presence of phenylselenyl chloride, followed by selenocystine, while selenomethionine was not inhibitory. Regarding the mammalian XPA protein involved in the recognition of DNA lesions during nucleotide excision repair, its DNA-binding capacity was diminished by Cd(II), Cu(II), Ni(II) and Co(II), while Hg(II), Pb(II) and As(III) were ineffective. Finally, the H(2)O(2)-induced activation of the poly(ADP-ribose)polymerase (PARP) involved in DNA strand break detection and apoptosis was greatly reduced by Cd(II), Co(II), Ni(II) and As(III). Similarly, the disruption of correct p53 folding and DNA binding by Cd(II), Ni(II) and Co(II) has been shown by other authors. Therefore, zinc-dependent proteins involved in DNA repair and cell-cycle control may represent sensitive targets for some toxic metals such as Cd(II), Ni(II), Co(II) and Cu(II), as well as for some selenium compounds. Relevant mechanisms of inhibition appear to be the displacement of zinc by other transition metals as well as redox reactions leading to thiol/disulfide interchange.


Subject(s)
DNA Repair/drug effects , DNA-Binding Proteins/metabolism , Metals, Heavy/toxicity , Zinc Fingers/drug effects , Zinc/toxicity , Cations, Divalent , DNA Repair/physiology , Humans , N-Glycosyl Hydrolases/metabolism , Protein Folding , RNA-Binding Proteins/metabolism , Xeroderma Pigmentosum Group A Protein , Zinc Fingers/genetics
18.
Soz Praventivmed ; 45(5): 218-25, 2000.
Article in German | MEDLINE | ID: mdl-11081240

ABSTRACT

The aim of this study is to analyse the data of all Austrian in-patients who had been hospitalized between 1996 and 1998 with the main diagnosis "viral hepatitis" (according to ICD 9), in order to present data for epidemiological as well as health-economical considerations. The data used stem from the "Minimum Basic Data Set" (MBDS) which contains medical as well as demographical recordings of every in-patient treated in an Austrian public hospital. Hepatitis A: Values of the standardized hospitalization rate (SHR) ranged from 2.6/100,000 (1998) to 4.7/100,000 (1997). On age classes, the highest values regularly were observed in school-children (7-13/100,000 per year). Significant differences between males and females were not revealed. Among the Austrian federal states, Vienna was found to jut out (6.8/100,000 per year), probably due to its high proportion of immigrants from high-endemic regions. Hepatitis B: Values of SHR were found to be stable with about 3/100,000 per year. On age classes, rates increased rapidly in adolescents, reached the peak in young adults (aged 20 to 29 years: 5/100,000 per year) and, then, decreased slowly. Males were slightly, but not significantly, more affected than females. Interestingly, a respectable number of young children (aged 0 to 4 years) were hospitalized in 1997 and 1998 (1998: 4.4/100,000). Comparing the Austrian federal states, Vorarlberg (6.4/10,000 per year) and Vienna (4.5/100,000 per year) yielded the highest values of SHR. Hepatitis C: In the years observed, values of SHR were ascending successively from 6/100,000 (1996) to 9.7/100,000 (1998). On age classes, the highest risk of hospitalization was found for adults aged between 35 and 74 years (10-20/100,000 per year). Among the Austrian federal states, values of SHR differed considerably; Salzburg (15.1/10,000 per year) and Kärnten (Carinthia) (12.1/100,000 per year) were found to yield the highest values.


Subject(s)
Hepatitis A/epidemiology , Hepatitis B/epidemiology , Hepatitis C/epidemiology , Hospitalization/statistics & numerical data , Adolescent , Adult , Aged , Aged, 80 and over , Austria/epidemiology , Child , Child, Preschool , Cross-Sectional Studies , Female , Humans , Incidence , Infant , Male , Middle Aged
19.
Wien Klin Wochenschr ; 112(23): 995-1001, 2000 Dec 07.
Article in German | MEDLINE | ID: mdl-11190715

ABSTRACT

UNLABELLED: The aim of this study was to describe the incidence as well as the geographical distribution of hospitalizations due to hepatitis B or C (according to ICD 9) in Austria between 1996 and 1998. The data were taken from the MBDS (Minimum Basic Data Set) which contains medical, demographical and administrative recordings of every in-patient treated in an Austrian hospital. Hepatitis B: The mean value of SHR (standardized hospitalization rate) amounted to 3.2/100.000 for the entire area of Austria. Among all Austrian provinces, Vorarlberg yielded the highest regional value (6.4/100.000), Burgenland the lowest one (1.9/100.000). Considerably high regional values of SHR were found in most districts of Vorarlberg, as well as in Vienna and the eastern districts of Lower Austria. Hepatitis C: The mean value of SHR amounted to 8.4/100.000 for the entire area of Austria. Regional SHR values in Austrian provinces ranged widely from 2.9/100.000 (Burgenland) to 15.1/100.000 (Salzburg), some provinces (Salzburg, Carinthia) showed a marked increase of hospitalizations within the observation period. The highest regional values of SHR were found in and around the districts of Salzburg, Villach, and Klagenfurt. CONCLUSIONS: The differences observed in SHR values of Austrian districts cannot be accounted for by local differences of Hepatitis prevalence alone. They are supposedly also due to local differences of the health care system, as well as the clinical, diagnostical or documentational practices in hospitals in different regions. In order to evaluate MBDS-Data quality, a post-hoc comparison with external data stemming from three Austrian multicenter studies was performed. A remarkable correspondence in geographical distribution of hepatitis C patients was found between the two data sets. This is considered an argument in favour of the validity of MBDS-Data.


Subject(s)
Hepatitis B/epidemiology , Hepatitis C/epidemiology , Hospitalization/statistics & numerical data , Austria/epidemiology , Cross-Sectional Studies , Data Collection/statistics & numerical data , Humans , Incidence , Topography, Medical
20.
Soc Sci Med ; 44(4): 441-54, 1997 Feb.
Article in English | MEDLINE | ID: mdl-9015881

ABSTRACT

For cultural reasons modern contraception has been slow to gain acceptance in Ethiopia. Knowledge about contraception and abortion is still limited in many family and community settings in which it is socially disapproved. By 1990 only 4% of Ethiopian females aged 15-49 used contraception. Little is known of sexually transmitted disease (STD) prevalence in family planning (FP) attenders in Africa in general and Ethiopia in particular, even though attenders of family planning clinics (FPCs) are appropriate target groups for epidemiological studies and control programmes. A study of 2111 women of whom 542 (25.7%) attended FPCs in Addis Ababa showed utilisation rates to be highest in women who were: Tigre (33%) or Amhara (31%), aged 20-34 years (30%), age 16 or older at first marriage/coitus (28%:38% in those first married after 25 years); who had a monthly family income of 10 Ethiopian Birr (EB) or more (33%:36% for those with income 100-500 EB), three or more children (37%), more than five lifetime husbands/sexual partners (39%); or were bargirls (73%) or prostitutes (43%). The seroprevalence rates for all STDs, higher in FPC attenders compared with other women, were syphilis (TPHA) 39%, Neisseria gonorrhoeae 66%, genital chlamydia 64%, HSV-2 41%, HBV 40% and Haemophilus ducreyi 20%. Only 4% of FPC attenders had no serological evidence of STD: 64% were seropositive for 3 or more different STD. Clinical evidence of pelvic inflammatory disease (PID) was also more common in the FPC attenders (54%), 37% having evidence of salpingitis. The FPC provides a favourable setting for screening women likely to have high seroprevalence of STD, who for lack of symptoms will not attend either an STD clinic nor a hospital for routine check up. We recommend that measures be taken to adequately screen, treat and educate FPC attenders, their partners, and as appropriate and when possible their clients, in an attempt to control STDs and ultimately HIV in the community. Social, economic and cultural factors in the occurrence of STDs, prostitution, family planning and modern contraception coverage in Ethiopia are identified and deficiencies of current programmes briefly discussed with the objective of targeting services more effectively.


Subject(s)
Family Planning Services , Health Knowledge, Attitudes, Practice , Sexually Transmitted Diseases/etiology , Urban Health , Cultural Characteristics , Ethiopia/epidemiology , Female , Humans , Prevalence , Risk Factors , Sex Work , Sexually Transmitted Diseases/epidemiology , Sexually Transmitted Diseases/prevention & control , Socioeconomic Factors , Women's Health
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