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M McCarthy

Publications and source records attributed to M McCarthy.

At least 199 records · Page 11Linked to original sources
PubMed1997

Colloid osmotic properties of modified hemoglobins: chemically cross-linked versus polyethylene glycol surface-conjugated.

Colloid osmotic pressures of hemoglobin solutions containing unmodified, intramolecularly cross-linked, intermolecularly polymerized, or polyethylene glycol (PEG) surface-conjugated hemoglobin have been measured to determine their macromolecular solution properties. Tetrameric and polymeric hemoglobins show nearly ideal solution behavior: whereas, hemoglobins conjugated to PEG have significantly higher colloid osmotic activity and exhibit solution non-ideality. From these studies, the average calculated molecular weights are 65.300 +/- 3500 for unmodified and intramolecularly cross-linked hemoglobin tetramers, 156,000 for ring-opened raffinose polymerized human hemoglobin, 97,000 for pyridoxalated human hemoglobin conjugated to a carboxy-PEG polymer, and 117,000 for bovine hemoglobin conjugated to a methoxy-PEG polymer. The calculated radius of gyration for tetrameric hemoglobins is 2.9 +/- 0.2 nm compared to 4.9 nm for the polymerized hemoglobin, and 7.2 and 14.1 nm for the human and bovine PEG-conjugated hemoglobins, respectively. Exclusion volumes are calculated to be 823 +/- 148 nm3 for tetramers, 4000 nm3 for polymers, and 13,000 nm3 and 94,000 nm3 for human and bovine PEG-conjugated hemoglobins, respectively. These studies show that polyethylene glycol conjugated to surface amino groups greatly increases the effective macromolecular size of hemoglobin in solution.

Animals↗
PubMed1997

Depression subtyping in PTSD patients.

A Structured Clinical Interview for the DSM-IV (SCID) and psychological testing were administered to 260 combat veterans in order to investigate the relationship between symptoms of post-traumatic stress disorder (PTSD) and melancholic features of depression. Sixty-seven percent of PTSD patients experiencing comorbid major depression acknowledged symptoms indicative of a melancholic-depression subtype. Correlational and regression analyses show that the presence of melancholic features is related to severity of emotional-numbing experienced by the PTSD patients. These results suggest PTSD patients are likely to experience depressive episodes phenomenologically similar to melancholic-depression. It is likely that acknowledgment of melancholic symptoms is due to (a) the inclusion of guilt as a melancholic feature, and (b) the similarities between emotional numbing symptoms and other melancholic features.

Adult↗
PubMed1997

Variations in health behaviours among inner city 12-year-olds from four ethnic groups.

OBJECTIVES: To describe factors that contribute to variations in health-related behaviours and attitudes among inner city 12-year-olds. To see if there was an identifiable patterning by ethnic group. DESIGN: Semi-structured interviews with a stratified sample of 12-year-old students and their parents from four ethnic groups, attending state secondary schools in two inner London boroughs. RESULTS: Bangladeshi young people were significantly more likely to receive school meals. There was no variation in reported snacking between the groups. Girls and Bangladeshi students were less likely to report exercising outside school (33% of Bangladeshi boys reported not exercising outside school compared to 5% of boys from all other groups). Bangladeshi boys and their parents were more likely to report that bullying or worries about racial violence prevented them from going out after school. White young people were more likely to report experimenting with and the regular use of cigarettes and alcohol. Use of alcohol and cigarettes was also associated with gender, religion and strength of religious observance. White parents were the least likely to report restricting their child's social activities as a way of influencing behaviour and expressed more concerns about their child's potential for health-damaging behaviour than parents in all other groups. CONCLUSION: This study shows that ethnicity alone is insufficient and inadequate in explaining variations in health behaviours among inner city teenagers. A complex mix of personal, cultural and social factors including ethnicity shape the behaviours and attitudes of these young people.

Black or African American↗
PubMed1997

Association of the steroid synthesis gene CYP11a with polycystic ovary syndrome and hyperandrogenism.

Biochemical data implicate an underlying disorder of androgen biosynthesis and/or metabolism in the aetiology of polycystic ovary syndrome (PCOS). We have examined the segregation of the genes coding for two key enzymes in the synthesis and metabolism of androgens, cholesterol side chain cleavage (CYP11a) and aromatase (CYP19), with PCOS in 20 multiply-affected families. All analyses excluded CYP19 cosegregation with PCOS, demonstrating that this locus is not a major determinant of risk for the syndrome. However, our results provide evidence for linkage to the CYP11a locus (NPL score = 3.03, p = 0.003). Parametric analysis using a dominant model suggests genetic heterogeneity, generating a maximum HLOD score of 2.7 (alpha = 0.63). An association study of 97 consecutively identified Europids with PCOS and matched controls demonstrates significant allelic association of a CYP11a 5' UTR pentanucleotide repeat polymorphism with hirsute PCOS subjects (p = 0.03). A strong association was also found between alleles of this polymorphism and total serum testosterone levels in both affected and unaffected individuals (p = 0.002). Our data demonstrate that variation in CYP11a may play an important role in the aetiology of hyperandrogenaemia which is a common characteristic of polycystic ovary syndrome.

Aromatase↗
PubMed1997

The genetic basis of polycystic ovary syndrome.

Polycystic ovary syndrome (PCOS) is the most common endocrinopathy in women of reproductive age. Familial clustering of cases suggests that genetic factors play an important part in its aetiology. A number of studies of families with several cases of PCOS have produced results suggesting an autosomal dominant trait. Detailed analysis of a large number of affected families has, however, cast some doubt about the mode of inheritance. An autosomal dominant trait remains possible but a more complex aetiology seems more likely. The results of our recent studies support the concept of an oligogenic disorder in which genes affecting metabolic pathways in glucose homeostasis and steroid biosynthesis are both involved. We review evidence for an important role for the insulin gene minisatellite in the aetiology of anovulatory PCOS and for the gene coding for P450 cholesterol side chain cleavage (CYP11a) in the mechanism of excessive androgen secretion in women with polycystic ovaries. We propose that the heterogeneity of clinical and biochemical features in PCOS can be explained by the interaction of a small number of key genes with environmental, particularly nutritional, factors.

Cholesterol Side-Chain Cleavage Enzyme↗
PubMed1997

Use of extracorporeal liver assist device and auxiliary liver transplantation in fulminant hepatic failure.

The case history of a 14-year-old boy with fulminant hepatic failure secondary to non-A, non-B hepatitis who fulfilled selection criteria for orthotopic liver transplantation is described. Two forms of liver support were used (extracorporeal liver assist device and an auxiliary partial orthotopic liver transplantation) to provide additional time to allow spontaneous recovery to occur. During the 66 h of extracorporeal haemoperfusion through the device, haemodynamic stability was maintained along with improvements in serum bilirubin (555 to 381 mumol/l), and international normalized ratio (INR) (3.7 to 2.9). Deterioration in these parameters was observed following cessation of treatment and 10 h later, after a donor liver had become available, an auxiliary transplant was performed. Clinical recovery, though initially slow, was eventually complete, with histopathological and scintigraphic evidence of full liver regeneration at 3 months. Withdrawal of his immunosuppressive drugs began at 6 months and was complete by 14 months after auxiliary transplantation. He has since remained well with normal liver function tests. Temporary liver support may provide additional time for spontaneous recovery of the native liver to occur in selected cases of fulminant hepatic failure, even when criteria are fulfilled for orthotopic liver grafting.

Adolescent↗
PubMed1997

Localisation of a gene causing endocrine neoplasia to a 4 cM region on chromosome 1p35-p36.

The development of some endocrine tumours, such as medullary thyroid carcinomas, phaeochromocytomas, anterior pituitary adenomas, and parathyroid adenomas involve a putative tumour suppressor gene located on chromosome 1p32-pter, a region that represents 111 cM. In order to refine the location of this gene, 93 endocrine tumours (39 parathyroid adenomas, 40 anterior pituitary adenomas, seven pancreatic islet cell adenomas, and seven carcinoids) were investigated for loss of tumour heterozygosity (LOH) using the seven polymorphic loci 1pter-D1S228-D1S507-D1S234-D1S476-D1S22 0-D1S207-D1S206-1cen. LOH was detected in 27% of the parathyroid tumours and in 7.5% of the pituitary tumours, but in none of the pancreatic islet cell or carcinoid tumours. In addition, seven of the 10 parathyroid tumours that showed LOH of chromosome 1p facilitated a more precise mapping of this putative tumour suppressor gene; five tumours involved a loss only of the telomeric locus D1S228, whereas two other tumours showed LOH at the centromeric loci D1S507, D1S234, D1S476, and D1S220, but not D1S228. Thus, our results have mapped this tumour suppressor gene implicated in endocrine tumours to a 4 cM region flanked by D1S228 and D1S507 on chromosome 1p35-p36.

Alleles↗
PubMed1997

Communication and choice in dying from heart disease.

In heart disease palliative care has received less attention than in cancer. In the Regional Study of Care for the Dying, carers of a random sample of deaths in 20 English health districts were interviewed about 10 months after the death. There were 675 respondents for patients dying with heart disease, and we report data on 600 deaths that were not sudden. 54% of patients died in hospital, 30% in their own home, 11% in a nursing or residential home, and 4% in other places. Half the patients were said to have known, or probably known, that they were likely to die; of these, 82% were said to have worked this out for themselves rather than been told by a doctor or nurse. More than one-third of patients (39%) died without an informal carer present. Respondents said that a quarter of the patients had wanted to die earlier: this desire was associated with older age and the number and severity of symptoms. The study suggests the need for health services to give greater attention to palliative care for patients dying with heart disease.

Attitude to Death↗
PubMed1997

The effects of the clinical characteristics of dying cancer patients on informal caregivers' satisfaction with palliative care.

To assess associations between informal caregivers' satisfaction with services delivered to their dying cancer patients and their perceptions of the duration of functional limitation and the duration of various symptoms experienced by these patients, a secondary analysis was conducted on a subsample of the Regional Study of Care for the Dying (RSCD). The RSCD is a retrospective interview survey of family members or others who knew about the last year of life of a random sample of people who died in 20 health districts in the UK in 1990. The subsample consisted of 1858 informal caregivers of people who died from cancer (ICD codes 140-208). More than half (52%) of informal caregivers were highly satisfied with community nurses, compared to 39% and 35% of those who reported high satisfaction with services provided by general practitioners and hospital doctors respectively. Informal caregivers of patients who died from a lymphatic or haematopoietic tissue cancer were more likely than others to report high satisfaction with hospital doctors (47%), while least satisfaction was reported by those who cared for patients who had a neoplasm of the genito-urinary or respiratory/intrathoracic organs (30%). The duration of pain was not significantly related to any of the satisfaction measures. The results suggest the need to take patient clinical characteristics into account in population-based evaluations of palliative care. They also indicate the need for more research to be carried out to assess the reasons behind the dissatisfaction of informal caregivers of patients with respiratory or genito-urinary cancers with services provided by hospital doctors and to detect whether these patients have unmet needs that should be addressed. More research is also needed into the management of symptoms by the general practitioners, especially symptoms pertaining to respiration and incontinence.

Adult↗
PubMed1997

Carers' health status: is it associated with their evaluation of the quality of palliative care?

The associations between measures assessing bereaved carers' health status and their perceptions of the quality of palliative care delivered by community nurses, general practitioners and hospital doctors to cancer patients in their last year of life are investigated in this paper. Analysis was conducted on a sub-sample from the Regional Study of Care for the Dying (RSCD), a survey in which relatives or friends of a random sample of deaths in 1990 in 20 health districts in England were interviewed some 10 months after the death. The sub-sample consisted of 1858 carers of people who died from cancer. The results showed statistically significant associations between bereaved carers' self-rating of health status, their psychological functioning, their experience of bereavement-related health problems, and their satisfaction with services delivered by the different providers. Further research is needed, however, to explore in-depth the nature of these associations.

Attitude to Health↗
PubMed1997

The Adolescent Behavior Checklist: development and initial psychometric properties of a self-report measure for adolescents with ADHD.

Developed and provided initial psychometric properties on an adolescent, self-report questionnaire for attention deficit hyperactivity disorder (ADHD). The Adolescent Behavior Checklist (ABC) consists of 44 items that measure ADHD core symptoms and associated difficulties (e.g., conduct problems, academic problems, and social deficits). A total of 909 adolescents between the ages of 11 and 17 served as the standardization sample. Results indicated that the ABC was internally consistent. Principal components analysis revealed six factors for the ABC: Conduct Problems, Impulsivity/Hyperactivity, Poor Work Habits, Inattention, Emotional Lability, and Social Problems. Significant gender and race differences were obtained for some ABC factor scores, and initial standardization data were established based on this information. Initial convergent and divergent validity of the ABC was supported by the correlations obtained between factor scores and the subscale scores on the Child Behavior Checklist and Youth Self-Report. Using an additional sample of 81 adolescents, the stability of ABC scores across a 2-week interval was found to be satisfactory. Initial evidence for discriminant validity was established by comparing ABC scores for a sample of adolescents diagnosed with ADHD to the normative sample.

Adolescent↗
PubMed1997

General practitioners' views on the implementation of community-led maternity care in south Camden, London.

New recommendations suggesting that maternity care should be increasingly community-based have generated concern regarding the interprofessional cooperation between general practitioners and midwives. In Camden, London, this service was expanded in 1993. Although existing joint antenatal care arrangements between GPs and midwives were not expected to alter significantly, the shift of care from hospital to community midwives, and the expansion of community-led care to women with complications, was expected to have implications for the GPs. A questionnaire-based study asked GPs who provide antenatal care about their role and liaison with other professionals. Most were satisfied with the current arrangements; only a minority felt that their workload, clinical practice, or communication with obstetric teams had altered.

Attitude of Health Personnel↗
PubMed1997

The experience of dying with dementia: a retrospective study.

OBJECTIVE: To describe the last year of life of people with dementia, their symptoms, care needs, use of and satisfaction with health services and the bereavement state of the respondent. METHODS: The study is drawn from the Regional Study of Care for the Dying, a retrospective sample survey of the carers, family members or others who knew about the last year of life of a random sample of people age 15 and over dying in the last quarter of 1990. The samples were drawn in 20 English health districts which, although self-selected, were nationally representative. There was a total of 3696 patients (response rate of 69%) dying from all causes. Within this sample, 170 dementia patients were identified and compared with 1513 cancer patients. RESULTS: The symptoms most commonly reported in the last year were mental confusion (83%), urinary incontinence (72%), pain (64%), low mood (61%), constipation (59%) and loss of appetite (57%). Dementia patients saw their GP less often than cancer patients and their respondents rated GP assistance less highly. Dementia patients needed more help at home compared with cancer patients, and received more social services; 78% of respondents for dementia patients and 64% for cancer said they had come to terms with the patient's death. CONCLUSION: Patients dying from dementia have symptoms and health care needs comparable with cancer patients. Greater attention should be given to these needs.

Aged↗