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1.
Clin Exp Nephrol ; 22(4): 764-772, 2018 Aug.
Article in English | MEDLINE | ID: mdl-29204904

ABSTRACT

BACKGROUND: Transcription of transforming growth factor beta-1 (TGF-ß1) is regulated by a polymorphic promoter region containing African-specific single nucleotide polymorphisms (SNPs). Some of these SNPs have higher frequencies among Southern Africans compared to other African populations and their functionality has only been partially studied. Due to the high prevalence of HIV-associated nephropathy (HIVAN) in Africans we hypothesized that functional African TGFB1-promoter SNPs may contribute to HIVAN pathogenesis. METHODS: The functionality of the TGFB1 -1347 C>T variant and African-specific variants (-1287 G>A, -1154 C>T, -387 C>T and -14 G>A) were examined by measuring reporter gene expression in kidney and fibroblast cell lines co-transfected with TGFB1-promoter constructs and an HIV-Tat expression vector. TGF-ß1 immunohistochemical staining was performed on kidney biopsies with HIVAN (n = 18) and compared to control biopsies without HIVAN or tubulointerstitial disease (n = 12) using semi-quantitative and digital image analysis. HIVAN cases were genotyped for TGFB1 -1347 and -387 SNP variants. RESULTS: TGFB1-promoter haplotypes containing the African -387 T-allele resulted in ~ five-fold repression of TGFB1-promoter activity compared to -387 C haplotypes (p ≤ 0.024). HIV-Tat upregulated TGFB1-promoter activity for haplotypes containing -1347 T and -387 T in transfected renal cells (≈ 1.6-fold; p ≤ 0.030) and fibroblasts (≈ 1.3-fold; p ≤ 0.016). The renal interstitium from HIVAN biopsies, compared to HIV-positive and -negative controls, differed in the semi-quantitative TGF-ß1 staining and digital optical density analyses. The TGFB1 -1347 and -387 genotypes in HIVAN cases were similar to population controls. CONCLUSION: African-specific haplotypes lower TGFB1-promoter activity and expression levels and HIV-Tat upregulates TGFB1 promoter activity irrespective of the haplotype.


Subject(s)
AIDS-Associated Nephropathy/genetics , Regulatory Sequences, Nucleic Acid , Transforming Growth Factor beta1/genetics , AIDS-Associated Nephropathy/ethnology , Africa , Cell Line , Fibroblasts , Haplotypes , Humans , Kidney , Polymorphism, Single Nucleotide
2.
S Afr J Surg ; 61(3): 21-27, 2023 Sep.
Article in English | MEDLINE | ID: mdl-37791710

ABSTRACT

BACKGROUND: Damage control surgery (DCS) is a widely used approach in trauma. An open abdomen carries complications, increased morbidity and mortality. This study aims to quantify the mortality rate, determine contributory factors and factors influencing the decision to perform DCS and assess morbidity in patients undergoing open abdomen. METHODS: A retrospective review was conducted on 205 patients in Charlotte Maxeke Johannesburg Academic Hospital Trauma Unit. The mortality rate was evaluated over a 24-hour, 7-day and 28-day period. Data were collected by a data collection sheet from 1 January 2016 to 31 December 2018. RESULTS: Of the 205 patients, 193 were male and the median age was 34.34 years. Penetrating trauma was the most predominant mechanism of injury in 162 (79%), with gunshot injuries seen in the majority (130/162). The mortality rate was 55/205 (26.8%) for open abdomen patients, 19/55 (34.5%) within the first 24 hours, 22/55 (40%) in the 24-hours to 7-days period, and 14/55 (25.4%) in the 8-day to 28-day period. Statistically significant factors contributing to mortality were haemodynamic instability, hypothermia, coagulopathy, massive transfusion, vasopressors, and significant associated injuries. Morbidities were entero-atmospheric fistula (EAF) in 7.3% (Clavien-Dindo grade IIIa), surgical site infection in 45.3% (Clavien-Dindo grade I) and ventral hernia in 10.24% (Clavien-Dindo grade IIIb). CONCLUSION: Most open abdomens were performed in males, with gunshot injuries being the most common mechanism. The majority of mortalities were within the 24-hours to 7-days period. The most common morbidity associated with an open abdomen was surgical site infection.


Subject(s)
Abdominal Injuries , Surgical Wound Infection , Humans , Male , Adult , Female , Trauma Centers , Abdominal Injuries/complications , South Africa/epidemiology , Abdomen , Retrospective Studies
3.
S Afr Med J ; 112(1): 13518, 2022 02 02.
Article in English | MEDLINE | ID: mdl-35140000

ABSTRACT

BACKGROUND: Gaucher disease (GD) is a rare inherited autosomal recessive metabolic disorder with a prevalence in the general population of ~1 per 100 000. To optimise the recognition, diagnosis and management of patients with GD in South Africa (SA), it is important to have an understanding of local patterns of presentation of the disease. OBJECTIVES: To describe the baseline pretreatment characteristics of the SA cohort of patients enrolled into the International Collaborative Gaucher Group (ICGG) Gaucher Registry whowere treated with imiglucerase (Cerezyme; Sanofi Genzyme). METHODS: The ICGG Gaucher Registry is an observational, longitudinal, international database that tracks the clinical, demographic, genetic, biochemical and therapeutic characteristics of patients with GD globally, irrespective of disease severity, treatment status or treatment choice. The study population included all SA patients reported in the ICGG Gaucher Registry as of 1 May 2020. RESULTS: The registry included 49 SA GD patients, of whom 32 received imiglucerase as first primary GD therapy. All the patients had GD type 1, 59.4% were female, and mean and median ages at diagnosis were 14.7 and 9.8 years, respectively. The most common genotype was N370S/N370S (37.5%). At treatment initiation, 30.0% of patients had been splenectomised. Among patients for whom data were available, anaemia was present in one-third of non-splenectomised patients and 12.5% of those with splenectomy, and moderate or severe thrombocytopenia was reported in two-thirds of non-splenectomised patients. Bone pain was present in 30.8% and 57.1% of non- splenectomised and splenectomised patients, respectively. No bone crises were reported, and data relating to other bone complications were available for only ≤3 patients. CONCLUSIONS: Haematological findings and bone pain in this group are similar to those in the global ICGG Gaucher Registry cohort. Lack of baseline data for other bone complications limits interpretation in that regard. Clinicians who treat patients with GD are encouraged to submit accurate, complete and up-to-date information so that comprehensive data for the subset of SA GD patients can be maintained to improve recognition and diagnosis, and guide appropriate and effective use of treatment for SA patients.


Subject(s)
Enzyme Replacement Therapy/methods , Gaucher Disease/drug therapy , Glucosylceramidase/therapeutic use , Adolescent , Adult , Aged , Anemia/epidemiology , Anemia/etiology , Child , Child, Preschool , Female , Gaucher Disease/genetics , Genotype , Humans , Infant , Longitudinal Studies , Male , Middle Aged , Registries , South Africa , Splenectomy/statistics & numerical data , Thrombocytopenia/epidemiology , Thrombocytopenia/etiology , Young Adult
4.
Clin Otolaryngol ; 36(5): 482-8, 2011 Oct.
Article in English | MEDLINE | ID: mdl-21838807

ABSTRACT

OBJECTIVES: Suboptimal standards in tracheostomy care have been highlighted as a growing concern in view of the increasing demands for intensive care services. Our objective is to assess the impact of our model for tracheostomy care on patients with short-term tracheostomies (<4 months in situ) following their discharge from the intensive care unit. The model has three components: The St Mary's tracheostomy care bundle checklist, a dedicated tracheostomy multidisciplinary team and an educational programme. DESIGN: A 38-month prospective cohort study. SETTING: A London Teaching Hospital. PARTICIPANTS: A total of 102 patients with tracheostomy within the 19-month pre-intervention cohort and 95 patients in the 19-month post-intervention cohort. MAIN OUTCOME MEASURES: The number of clinical incidents, mean time taken for decannulation, mean total tracheostomy time and total number of days spent in the intensive care unit were assessed before and after the intervention. RESULTS: Time to decannulation following intensive care unit discharge decreased from 21 to 11 days, as did the mean total tracheostomy time, from 34 to 25 days (both statistically significant with a P < 0.0001 Mann-Whitney U-test). The number of critical incidents, which included all patients prior to exclusion, substantially declined following the introduction of intervention from 58 to 7 in the second year after intervention. CONCLUSIONS: A multidisciplinary care model significantly expedited the decannulation process and reduced the overall time that a tracheostomy was in situ. The intervention was associated with a reduction in clinical incidents and shorter intensive care unit admissions, which can be associated with significant monetary savings.


Subject(s)
Patient Care Team/standards , Patient Care/standards , Tracheostomy , APACHE , Female , Hospitals, Teaching , Humans , Intensive Care Units , London , Male , Middle Aged , Prospective Studies , Statistics, Nonparametric
5.
S Afr J Surg ; 59(4): 195a-195c, 2021 Dec.
Article in English | MEDLINE | ID: mdl-34889547

ABSTRACT

SUMMARY: Gestational gigantomastia is rare and characterised by rapid and disproportionate enlargement of the breast during pregnancy. It often requires surgical removal of more than 1500 g of breast tissue. Of the 50 case reports published worldwide, not one was in South African literature. This unusual case report is of a female presenting with gigantomastia at five weeks gestational age. The patient was multiparous and decided to terminate the pregnancy due to the physical and emotional effects of the large, pendulous breasts. Management included breast reduction and free nipple grafting in a staged approach. The complications are briefly outlined. Despite rare presentation, patient satisfaction was achieved.


Subject(s)
Mammaplasty , Breast/abnormalities , Female , Humans , Hypertrophy/surgery , Mammaplasty/adverse effects , Nipples/surgery , Pregnancy
6.
Curationis ; 30(1): 32-40, 2007 Mar.
Article in English | MEDLINE | ID: mdl-17515314

ABSTRACT

Escalating adolescent pregnancy and risky sexual behaviour is becoming more common amongst young adolescents and especially amongst black adolescents in South Africa. Statistics confirm that South African adolescents as young as fourteen are already sexually active and become pregnant. The decision to become sexually active with resulting adolescent pregnancy whether planned or not, are directly influenced by the teenager's beliefs. A person's beliefs consist of a person' own individual beliefs or attitude as well as what the individual subjective norm which the individual perceive as other people's beliefs regarding the same object of reason. The aim of the study was to describe the attitude of black grade six learners under the age of fourteen, towards adolescent pregnancy and sex. A quantitative descriptive research design was used. Results were clustered according to demographic variables as well as beliefs that consist of attitude and subjective norm. Findings provided insight into the beliefs of grade six learners regarding sex and adulthood, the roll of peer pressure, relationships of adolescent parents, social interaction of teenage parents, ability of adolescent parent's ability to provide in the needs of the baby, the adequacy of a child support grant to raise a baby as well as the levels of education of adolescent parents. This article provide a detailed reflection on these results and propose off a doll parenting intervention strategy as means of modification of attitude and subjective norms of grade six learners in order to alter sexual behaviour.


Subject(s)
Attitude , Pregnancy in Adolescence/prevention & control , Sexual Behavior , Adolescent , Child , Female , Humans , Intention , Male , Parenting , Pregnancy , Sex Education , Social Values , South Africa
7.
Cent Afr J Med ; 52(3-4): 35-8, 2006.
Article in English | MEDLINE | ID: mdl-18254461

ABSTRACT

OBJECTIVE: The profile and associated factors for re-admitted epileptic patients with complications was determined. Repeated re-admission to Komani Hospital initiated the study to identify preventable factors aimed at reducing readmission of these patients. DESIGN: Descriptive study. SETTING: Komani Hospital, Queenstown, South Africa. SUBJECTS: 101 patients previously diagnosed with epilepsy and who were re-admitted to Komani Hospital with post-ictal complications, were included. MAIN OUTCOME MEASURES: Epileptic patients were identified on admission and were interviewed. Information of the post-ictal events was gathered from people accompanying the patient and who had witnessed the seizure. Patient information about associated factors like substance abuse, level of education, employment status, compliance, drug regimes and other issues were explored. RESULTS: Many (63%) patients were unemployed, 54% of the patients used alcohol and 24% had a history of substance abuse (cannabis). Most patients (71%) gave no family history of epilepsy. 10% of the patients had frequent seizures (once a week or once every two weeks) and 55% of the patients had infrequent seizures (once a month). More than a third (35%) of the patients had good control of seizures (once a year up to a maximum of three attacks per year). Most patients (97%) were on monotherapy. For (35%) of patients this was a second admission, with second and third admission representing more than 60% of patients. Most patients (56.4%) experienced myoclonic seizures (data gathered from patient notes, referral letters and collateral information) with a seizure frequency of at least once a month. Post-ictal psychosis was the most common cause of admission (68%). CONCLUSION: The onset of epilepsy in most patients was on or after 20 years of age. According to patient notes, referral letters and-collateral information, the majority of patients experienced myoclonic type seizures with a frequency of at least once a month or more. Most patients were stabilized on monotherapy and post-ictal psychosis was the most common cause of re-admission. Cannabis and alcohol use in the study group is of note.


Subject(s)
Epilepsy/complications , Patient Readmission/statistics & numerical data , Treatment Failure , Adult , Aged , Anticonvulsants/therapeutic use , Epilepsy/drug therapy , Epilepsy/physiopathology , Female , Health Surveys , Humans , Interviews as Topic , Male , Middle Aged , Pilot Projects , Risk Factors , South Africa
8.
Curationis ; 29(2): 12-5, 2006 May.
Article in English | MEDLINE | ID: mdl-16910129

ABSTRACT

This was a descriptive study that determined patients' satisfaction with health care in the Taung district state health institutions, North West Province. One hospital, three health centres and five clinics were randomly selected, and consecutive patients were recruited at outpatients during 17 May 2000 - 17 June 2000. The patients completed a questionnaire regarding the service or care provided. Five hundred and sixty seven patients participated in the study. The median age was 30 years, and most patients were female (76.7%). More than half of patients (56.8%) were not satisfied with the availability of medicines and other supplies. Approximately two thirds of patients (65.2%) did not know about the quality of telephone services rendered. There was a high level of dissatisfaction (63.1%) among patients regarding accessing doctors after hours. Most patients were satisfied with the general attitude of health workers (62.1%) but 21.2% were dissatisfied. Few (11.7%) patients felt rushed during consultation. Most patients felt they received good health education when their illness was discussed (74.6%). Words and explanations used were easy to understand (76.7%); and they were not discouraged from asking questions (69.9%, n=539). Generally the level of satisfaction among the patients was high except for difficulty in accessing doctors after hours and lack of medicines.


Subject(s)
Community Health Services/standards , Patient Satisfaction/statistics & numerical data , Quality of Health Care , Adolescent , Adult , Aged , Aged, 80 and over , Female , Health Care Surveys , Health Services Accessibility , Humans , Male , Middle Aged , Professional-Patient Relations , South Africa , Surveys and Questionnaires
9.
Int J Obstet Anesth ; 28: 61-69, 2016 Dec.
Article in English | MEDLINE | ID: mdl-27816269

ABSTRACT

Carbetocin is a new synthetic analogue of oxytocin. It has a longer half life than oxytocin. This review examines the current evidence for the use of carbetocin as an alternative to oxytocin, as a first-line agent in the pharmacological management of the third stage of labour.


Subject(s)
Oxytocics/therapeutic use , Oxytocin/analogs & derivatives , Postpartum Hemorrhage/prevention & control , Adult , Female , Humans , Oxytocin/therapeutic use
10.
Int J Lab Hematol ; 38(2): 119-24, 2016 Apr.
Article in English | MEDLINE | ID: mdl-26566770

ABSTRACT

INTRODUCTION: Physiological changes during pregnancy affect routine tests for iron deficiency. The reticulocyte haemoglobin equivalent (RET-He) and serum-soluble transferrin receptor (sTfR) assay are newer diagnostic parameters for the detection of iron deficiency, combined in the Thomas diagnostic plot. We used this plot to determine the iron status of pregnant women presenting for their first visit to an antenatal clinic in Bloemfontein, South Africa. METHODS: Routine laboratory tests (serum ferritin, full blood count and C-reactive protein) and RET-He and sTfR were performed. The iron status was determined using the Thomas plot. RESULTS: For this study, 103 pregnant women were recruited. According to the Thomas plot, 72.8% of the participants had normal iron stores and erythropoiesis. Iron-deficient erythropoiesis was detected in 12.6%. A third of participants were anaemic. Serum ferritin showed excellent sensitivity but poor specificity for detecting depleted iron stores. HIV status had no influence on the iron status of the participants. CONCLUSION: Our findings reiterate that causes other than iron deficiency should be considered in anaemic individuals. When compared with the Thomas plot, a low serum ferritin is a sensitive but nonspecific indicator of iron deficiency. The Thomas plot may provide useful information to identify pregnant individuals in whom haematologic parameters indicate limited iron availability for erythropoiesis.


Subject(s)
Biomarkers , Hemoglobins/metabolism , Iron/metabolism , Reticulocytes/metabolism , Adolescent , Adult , Anemia, Iron-Deficiency/blood , Anemia, Iron-Deficiency/diagnosis , Blood Cell Count , C-Reactive Protein/metabolism , Female , Ferritins/blood , Humans , Iron/blood , Pregnancy , Pregnancy Complications, Hematologic , Young Adult
12.
Curationis ; 28(3): 73-7, 2005 Aug.
Article in English | MEDLINE | ID: mdl-16245482

ABSTRACT

The purpose of this study was to determine the use of non-pharmacologic methods of pain management used by midwives in Lesotho. The research design was non-experimental and of a descriptive nature. The data was obtained by means of a structured questionnaire which was compiled after a thorough literature analysis was done. Midwives, working in the Maternity wards of the Christian Hospital Association of Lesotho as well as the government Hospitals completed the questionnaires. All data was analysed on a nominal descriptive level. According to the results, the midwives indicated that they were taught non-pharmacologic methods of pain management, however they expressed that they inadequately use these methods during the first stage of labour due to shortage of staff, lack of privacy and space, a high midwife-mother ratio, culture and hospital policies. In the light of these findings, recommendations were made of maximizing the use of non-pharmacologic methods during the first stage of labour.


Subject(s)
Analgesia, Obstetrical/methods , Attitude of Health Personnel , Labor Pain/nursing , Nurse Midwives/organization & administration , Nursing Staff, Hospital/organization & administration , Obstetric Nursing/methods , Adaptation, Psychological , Adult , Analgesia, Obstetrical/nursing , Female , Health Knowledge, Attitudes, Practice , Helping Behavior , Humans , Labor Pain/psychology , Labor Stage, First , Lesotho , Middle Aged , Nurse Midwives/education , Nurse Midwives/psychology , Nurse's Role , Nurse-Patient Relations , Nursing Methodology Research , Nursing Staff, Hospital/education , Nursing Staff, Hospital/psychology , Obstetric Nursing/education , Organizational Culture , Pregnancy , Professional Autonomy , Relaxation Therapy , Social Support , Surveys and Questionnaires , Workload
13.
J Nucl Med ; 34(6): 963-7, 1993 Jun.
Article in English | MEDLINE | ID: mdl-8509866

ABSTRACT

SPECT enables quantitation of organ volume with radionuclide techniques using threshold edge detection methods. Previous phantom studies showed that a negative correlation exists between volume and threshold value. In those studies, the use of calibration curves were believed to correct for volume dependence on threshold values. The aim of this study was to evaluate the accuracy of spleen volume determination in 20 patients with SPECT by employing a varying threshold edge detection technique with volumes derived from CT. All patients had both radionuclide and CT examinations that were reconstructed with a filtered backprojection algorithm. During SPECT reconstruction, transverse slices were obtained with attenuation correction (Method A) and without attenuation correction (Method B). CT volumes were calculated from manually drawn regions of interest, whereas SPECT volumes were calculated with an automated algorithm using previously determined calibration curves. A confidence interval for calculated SPECT volumes also was calculated because of possible errors in the threshold value. The spleen volumes studied ranged from 91.2 ml to 1660.1 ml. Regression analysis yielded equations of CT = 0.97 SPECT + 7.07 (r = 0.996) and CT = 1.05 SPECT - 19.25 (r = 0.990) between CT and SPECT spleen volumes with a standard error of the y estimates of 31.10 ml and 54.47 ml, respectively. A mean percentage difference of 10.5% +/- 7.6% and 11.4% +/- 6.6% in spleen volume was obtained for Methods A and B in comparison with CT spleen volumes. The threshold value varied between 40.9% and 32.4% for Method A and between 41.2% and 28.5% for Method B because the spleen volume is increased. The varying threshold edge detection technique described in this paper can be implemented successfully in the clinical setting.


Subject(s)
Image Processing, Computer-Assisted/methods , Spleen/diagnostic imaging , Tomography, Emission-Computed, Single-Photon/methods , Tomography, X-Ray Computed , Adult , Algorithms , Humans , Regression Analysis
14.
J Nucl Med ; 40(9): 1532-5, 1999 Sep.
Article in English | MEDLINE | ID: mdl-10492376

ABSTRACT

UNLABELLED: The use of 99mTc-labeled red blood cells (RBC) for the evaluation of left ventricular function using equilibrium-gated blood-pool imaging suffers from several problems and potential risks. In this study, we estimated the absorbed radiation dose of 99mTc-labeled dimercaptopropionyl human serum albumin (DMP-HSA) as a potential alternative to 99mTc-RBC. METHODS: After the administration of 99mTc-DMP-HSA, whole-body imaging was performed up to 48 h after injection in five volunteers. The heart contents, liver and remainder of the body were used as source organs. Multicompartment modeling of the biodistribution was performed and absorbed radiation dose estimates for 99mTc-DMP-HSA were obtained using the Medical Internal Radiation Dose (MIRD) calculation. RESULTS: Residence times of 0.62 and 0.43 h were obtained for the heart contents and liver, respectively. Radiation dose estimates yielded an effective dose of 0.0055 mSv/MBq. CONCLUSION: 99MTC-DMP-HSA yielded absorbed radiation doses comparable with those of 99mTc-RBC. Therefore, the radiation properties of 99mTc-DMP-HSA are such that it can be used for clinical diagnostic studies.


Subject(s)
Organotechnetium Compounds/pharmacokinetics , Radiopharmaceuticals/pharmacokinetics , Absorption , Adult , Biological Transport , Computer Simulation , Humans , Male , Radiation Dosage , Tissue Distribution
15.
Am J Trop Med Hyg ; 32(6): 1407-15, 1983 Nov.
Article in English | MEDLINE | ID: mdl-6418019

ABSTRACT

Crimean-Congo hemorrhagic fever virus was isolated for the first time in South Africa in February 1981, from the blood of a 13-year-old boy who died in Johannesburg after attending a camp in a nature reserve in the western Transvaal. Virus was isolated from 21/120 pools of questing ticks from the nature reserve, the infected species being Hyalomma marginatum rufipes and H. truncatum. Virus was also isolated from 4/38 pools of partially engorged ticks and other ectoparasites collected off hosts, the infected species being H.m. rufipes, H. truncatum and Rhipicephalus evertsi. Antibodies were found in the sera of 5/74 humans, 8/26 wild vertebrates, 74/270 sheep, and 109/170 cattle from the reserve and surrounding farms. Antibodies were also found in 28/200 hares from various locations in the country. It was concluded that the virus is widely prevalent in South Africa, but the full medical and veterinary significance of its presence has yet to be determined.


Subject(s)
Bunyaviridae/isolation & purification , Hemorrhagic Fever Virus, Crimean-Congo/isolation & purification , Hemorrhagic Fever, Crimean/epidemiology , Ticks/microbiology , Adolescent , Animals , Animals, Wild/immunology , Antibodies, Viral/analysis , Cattle/immunology , Hemorrhagic Fever Virus, Crimean-Congo/immunology , Hemorrhagic Fever, Crimean/microbiology , Humans , Male , Sheep/immunology , South Africa
16.
J Virol Methods ; 59(1-2): 73-82, 1996 May.
Article in English | MEDLINE | ID: mdl-8793832

ABSTRACT

A DNA amplification test was developed for the sensitive detection of the diarrhoea-associated subgroup F adenoviruses in clinical specimens. The test was made highly specific for serotypes 40 and 41 by using a region of the genome (the long-fiber gene) which is not significantly homologous to other human adenoviruses, but which is highly conserved between Ad40 and Ad41. A positive subgroup F adenovirus diagnosis was characterized by the presence of an amplification product of 152 base pairs, which could be digested into products of predictable length by restriction enzymes XbaI and SpeI. The viruses were typed as either Ad40 or Ad41 by digestion of the amplification product with a restriction enzyme which digested only Ad40 DNA. The specificity of the test was assessed using DNA from other adenoviruses, from human and simian cells, and from bacteria commonly found in the human intestine. There was a strong correlation between results of typing obtained with PCR and restriction enzyme typing of Ad40 and Ad41, and also positivity using subgroup F specific probes in dot blot hybridizations.


Subject(s)
Adenovirus Infections, Human/virology , Adenoviruses, Human/isolation & purification , DNA, Viral/analysis , Diarrhea/virology , Polymerase Chain Reaction/methods , Adenovirus Infections, Human/metabolism , Adenoviruses, Human/classification , Adenoviruses, Human/genetics , Animals , Base Sequence , Cell Line , Chlorocebus aethiops , Diarrhea/metabolism , Feces/virology , HeLa Cells , Humans , Molecular Sequence Data , Sensitivity and Specificity , Templates, Genetic , Vero Cells
17.
Anticancer Res ; 20(4): 2697-703, 2000.
Article in English | MEDLINE | ID: mdl-10953346

ABSTRACT

BACKGROUND: Cancer of the oesophagus is the most common gastrointestinal malignancy in South African blacks. The aim of this study was to determine whether repetitive heat-shock (HS) treatment of oesophageal cancer cells would induce multi-drug resistance (MDR) as was previously found with human renal carcinoma cells. METHODS: The oesophageal cancer-line WHCO-3 was heat-shocked in sequence, on five occasions, for 90 min each at 42 degrees C, followed by a recovery period of 24 h between the consecutive HSs. After each shock and recovery period the cells were divided; one part was used for the next shock treatment and the other, designated the HS fraction, was used for assessments of drug cytotoxicity, enhanced mdr-1 and mrp gene expression by RT-PCR, and enhanced isoenzyme GsT-P activity. The IC50s of the drugs doxorubicin, amsacrine, melphalan, and cisplatin were determined after each HS using the sulphorhodamine B(SRB) cell-proliferation assay which was able to assess cytotoxicity. A drug accumulation assay was conducted by measuring 3H-Vinblastin uptake in surviving cells using the SRB assay to quantitate the viable cells. RESULTS: Multiple heat-shocks did not introduce MDR via the MDR-1 or MRP mechanisms because these genes were not over-expressed after consecutive HS treatments. Deminished cytotoxicity of the drugs, as measured by increased IC50, did not occur, as it would have been if MDR was introduced. Therefore neither the topoisomerase drug resistant mechanism nor the enhanced GsT-P detoxification mechanism were introduced with repetitive heat-shocks. On the contrary the IC50s of doxorubucin and amsacrine decreased after five HSs, whereas melphalan and cisplatin, had no cytotoxic effects. The GsT-P levels were dramatically reduced by 90% after five HSs and an 8 day recovery period, indicating that the cancer cells became more sensitive towards toxic drugs and not drug resistant as expected. However, with the drug influx assay the uptake of 3H-vinblastin was reduced, with each consecutive HS, and not reversed by verapamil thereby confirming the finding that the efflux mechanisms of MDR-1 and MRP were not introduced. CONCLUSIONS: Repetitive heat shocks did not introduce multi-drug resistance, but on the contrary, sensitized the oesophageal cancer cells against toxic anticancer drugs and they therefore became thermosensitized.


Subject(s)
Esophageal Neoplasms/drug therapy , Hot Temperature , ATP Binding Cassette Transporter, Subfamily B, Member 1/genetics , ATP-Binding Cassette Transporters/genetics , Drug Resistance, Multiple , Drug Resistance, Neoplasm , Humans , Multidrug Resistance-Associated Proteins , Tumor Cells, Cultured , Vinblastine/pharmacokinetics
18.
Eur J Clin Nutr ; 53(3): 165-73, 1999 Mar.
Article in English | MEDLINE | ID: mdl-10201796

ABSTRACT

OBJECTIVE: To evaluate the nutritional intake and status of HIV-1 seropositive patients, as well as the relationship between malnutrition and disease stage. DESIGN: A cross-sectional study. SETTINGS: The Immunology Clinic at the Pelonomi Hospital in Bloemfontein, South Africa. SUBJECTS: Eighty-one HIV/AIDS patients in different stages of disease were recruited consecutively from January to May 1995. Eleven of these patients were followed in 1997. MAIN OUTCOME MEASURES: Anthropometric data including current weight, height, triceps skinfold thickness, mid-upper-arm circumference, body mass index and bone-free arm muscle area were collected. Nutrient intake was estimated using a diet history in combination with a standardised food frequency questionnaire. The patients were divided into 3 groups according to their CD4+ T cell counts. RESULTS: The men were leaner (BMI = 18.9) than the women (BMI = 22.7) and patients with a CD4+ T cell count < 200 (stage III) tended to have the lowest median values for all anthropometric measurements. More than half the patients had a low intake (< 67% of the recommended dietary allowances) of vitamin C, vitamin B6, vitamin D, vitamin A, calcium, iron and zinc. CONCLUSIONS: The results confirms that HIV/AIDS patients from this population are malnourished. There was, however, no association between disease stage and nutritional status. Nutritional supplementation of HIV/AIDS patients should be considered, as this might lead to improved immune function in these patients.


Subject(s)
Acquired Immunodeficiency Syndrome/physiopathology , Anthropometry , Diet , HIV Seropositivity/physiopathology , Nutritional Status , Adolescent , Adult , Aged , Body Height , Body Mass Index , Body Weight , CD4 Lymphocyte Count , Female , Humans , Male , Middle Aged , Muscle, Skeletal/pathology , Skinfold Thickness , South Africa , Vitamins/administration & dosage
19.
Nucl Med Commun ; 21(6): 539-44, 2000 Jun.
Article in English | MEDLINE | ID: mdl-10894563

ABSTRACT

Red cell volume (RCV) and plasma volume (PV) measurements are performed routinely in nuclear medicine departments to diagnose a number of haematological disorders. Currently, 125I-HSA is used as a plasma tracer and 99Tcm-labelled red cells to determine red cell volume. 125I-HSA is not always readily available, leading to inconvenience for patients and medical practitioners. Due to the availability of 99Tcm in nuclear medicine departments, the use of albumin labelled with 99Tcm was investigated. A new 99Tcm-human serum albumin labelling kit (99Tcm-DMP-HSA) was developed by Verbeke and supplied for use in this study. The main aim of the study was to investigate the use of 99Tcm-DMP-HSA for PV determination. Secondly, the feasibility to determine red cell and plasma volume simultaneously using 99Tcm as radionuclide in both instances was investigated. Fourteen healthy volunteers were enrolled in the dual-phase study. During the first study, 99Tcm-DMP-HSA was used as tracer to calculate PV (PV1a) after intravenous administration. Subsequently, 99Tcm-labelled red cells were administered and the PV (PV1b) and RCV (RCV1) were calculated. The second study was repeated within 2 weeks using the conventional method. 125I-HSA and 99Tcm-labelled red cells were administered simultaneously. The PV (PV2) and RCV (RCV2) were calculated. We found that the redistribution of 99Tcm-DMP-HSA is faster than that of 125I-HSA; therefore, the plasma counts obtained at different times were back-extrapolated to time zero for plasma volume calculations. The mean values for the different calculated PVs were 2964+/-470 ml for PV1a, 3006+/-623 ml for PV1b and 3001+/-530 ml for PV2, the reference PV. The confidence intervals indicate no significant differences between plasma volumes PV1a and PV2 and plasma volumes PV1a and PV1b. The mean calculated RCV1 was 2130+/-322 ml; that of RCV2 was 2128+/-353 ml. The difference between RCV1 and RCV2 was not significant. Our results indicate that 99Tcm-DMP-HSA could be used for plasma volume calculation. Red cell and plasma volumes can be calculated simultaneously using 99Tcm as radionuclide in both cases.


Subject(s)
Erythrocyte Volume , Plasma Volume , Radiopharmaceuticals , Technetium Tc 99m Aggregated Albumin , Technetium Tc 99m Pentetate , Humans , Radiopharmaceuticals/pharmacokinetics , Reference Values , Regression Analysis , Technetium Tc 99m Aggregated Albumin/pharmacokinetics , Technetium Tc 99m Pentetate/pharmacokinetics
20.
Int J Gynaecol Obstet ; 84(3): 236-40, 2004 Mar.
Article in English | MEDLINE | ID: mdl-15001371

ABSTRACT

OBJECTIVES: The aim of this study was to introduce uterine artery embolization (UAE) as an effective and safe treatment option in patients with symptomatic fibroids. METHODS: Sixty-one patients underwent UAE with a 3- and 12-month follow-up. RESULTS: The procedure was well tolerated in all patients with the following symptoms improving: heavy bleeding [90% (95% CI 80.21%; 95.4%)]; dysmenorrhea [median -4 (95% CI -5; -4)]; feeling of a mass [74% (95% CI 57.9%; 85.8%)]; abdomino-pelvic discomfort [88% (95% CI 75.5%; 94.9%)]; and deep dyspareunia [90% (95% CI 71.1%; 97.3%)]. Uterine volume decreased by a median difference of 188 cm(3) (95% CI 146.5; 236), which related to a median % reduction of 37.7% (95% CI 32.4%; 45%) at 12-month follow-up. Most (91%) patients were satisfied with the procedure and only minor complications occurred. CONCLUSIONS: Uterine artery embolization can be performed effectively and safely at centers with the necessary expertise and can be used with success in Africa.


Subject(s)
Embolization, Therapeutic , Leiomyoma/therapy , Uterine Neoplasms/therapy , Uterus/blood supply , Adult , Female , Humans , Leiomyoma/complications , Menorrhagia/etiology , Menorrhagia/therapy , Middle Aged , Treatment Outcome , Uterine Neoplasms/complications
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