Biomedical subjects
H G Kennedy
Publications and source records attributed to H G Kennedy.
Association and spreading of the Drosophila dosage compensation complex from a discrete roX1 chromatin entry site.
In Drosophila, dosage compensation is controlled by the male-specific lethal (MSL) complex consisting of MSL proteins and roX RNAs. The MSL complex is specifically localized on the male X chromosome to increase its expression approximately 2-fold. We recently proposed a model for the targeted assembly of the MSL complex, in which initial binding occurs at approximately 35 dispersed chromatin entry sites, followed by spreading in cis into flanking regions. Here, we analyze one of the chromatin entry sites, the roX1 gene, to determine which sequences are sufficient to recruit the MSL complex. We found association and spreading of the MSL complex from roX1 transgenes in the absence of detectable roX1 RNA synthesis from the transgene. We mapped the recruitment activity to a 217 bp roX1 fragment that shows male-specific DNase hypersensitivity and can be preferentially cross-linked in vivo to the MSL complex. When inserted on autosomes, this small roX1 segment is sufficient to produce an ectopic chromatin entry site that can nucleate binding and spreading of the MSL complex hundreds of kilobases into neighboring regions.
Advantages of depot antipsychotics.
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Homicide, novel antipsychotics, and non-compliance.
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Violence, homicide and suicide: strong correlation and wide variation across districts.
BACKGROUND: The clinical assessment and management of the risk of violence and suicide by people with mental illness may have to focus on environmental as well as individual factors. AIMS: To investigate possible associations between violence, homicide and suicide rates, population density and indices of deprivation, with particular reference to inner-city boroughs. METHOD: Coroners' statistics in London for homicide and suicide were obtained, with police-reported homicide and violence rates as a validity check. Correlations were made between these data and population density, the Jarman under-privileged areas score, and the Mental Illness Needs Index for each of the 32 London boroughs. RESULTS: Homicide rates had a 14.3-fold range, suicide a 4.4-fold range and interpersonal violence a 6.6-fold range. The variables under study were strongly correlated with each other. Rates were highest in boroughs with high population density and deprivation scores. The associations persisted when covarying for deprivation, age structure or population density. CONCLUSIONS: Because violence, homicide and suicide are so closely correlated, they are likely to be valid indices of the differences between adjacent boroughs; this has implications for the delivery of preventive and mental health services and for clinical management of risk.
Acute excited states and sudden death.
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Acute excited states and sudden death.
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Evaluation of a psychiatric court liaison scheme in north London.
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Patterns of denial in sex offenders.
Men convicted of sex offences (N = 102) were interviewed in two prisons. Cluster analysis was used to generate three groups according to pattern of denial; a fourth group was composed of men who denied their offence altogether. The groups differed in their ethnic make-up, offence type and past history of sexual offending.
Parental hostage takers.
Three men presented to a single regional secure psychiatric unit over a twelve-month period, after taking their youngest child hostage in their own homes because of a threatened separation from the family. In each case the episode had escalated because of hostility to police involvement in what for them was a typical domestic upheaval. All cases ended without injury. In each man, substance abuse, a family history of domestic violence and fears of rejection were prominent, and the recent birth of a child may have been an added precipitant. There may be a common family structure which predisposes to such situations. Psychiatric intervention was deemed appropriate, with some evidence of benefit for the two men who engaged in treatment.
Fear and anger in delusional (paranoid) disorder: the association with violence.
We report a series of 15 patients with delusional (paranoid) disorder as defined in DSM-III-R. All were supervised by a forensic psychiatry service after violent or threatening acts. We hypothesised that delusions and actions in these patients would be congruent with an abnormal mood characterised by fear and anger. Informants and the patients indicated a pervasive and persistent abnormality of mood (fear and defensive anger), with delusions and actions that were congruent with this mood during the offence and for over a month before. Other behaviours, such as fleeing or barricading to avoid delusional persecutors, were also consistent with congruence of mood and delusions. In all cases, violent acts and mood were congruent, but in three cases the violent act was unrelated to delusions. Although a study such as this does not demonstrate that the mood abnormality is primary, we believe moods of fear and anger in delusional disorder are not sufficiently recognised as part of the disorder.
Hot-headed or impulsive?
A sample of men in prison was interviewed and rated for the presence of six behaviours commonly thought to be impulsive: alcohol abuse (CAGE positive), sedative dependence, other drug abuse, pathological gambling, repeated aggression and self-harm. They were also asked to complete the EPQ and 15 questionnaires. Out of 61 men on a 'special protection, wing, 51 agreed to take part. We found that the score on the Impulsiveness scale of the 15 correlated with the number of disorders present in individuals, even when corrected for age. Pathological gambling and self-harm did not correlate with the presence of any of the other behaviours.
Pulmonary function after bone marrow transplantation for chronic myeloid leukaemia.
Pulmonary function was measured before and at intervals after treatment in 44 patients who received a bone marrow transplant for chronic myeloid leukaemia in the chronic phase. All patients were treated with cytotoxic drugs, total body irradiation, and post-graft immunosuppression. Thirty four patients surviving for 12 months were followed at three monthly intervals and 16 patients for 24 months. Fifteen patients received unmanipulated donor marrow cells and 29 patients received donor marrow cells depleted of lymphocytes ex vivo with the monoclonal antibody Campath-1. The 21 patients treated early in this study received 10 Gy of total body irradiation whereas the 23 patients treated more recently, who were all T lymphocyte depleted, received 12 Gy. Pretransplant lung function for the group was normal and was similar in survivors (n = 34) and nonsurvivors (n = 10), and in smokers (n = 8) and non-smokers (n = 36). (Carbon monoxide transfer factor--TLCO) was under 75% of predicted normal in nine patients before transplantation. TLCO, carbon monoxide transfer coefficient (KCO), FEV1, and vital capacity (VC) values were lower 6 and 12 months after bone marrow transplant than initially. The greatest decline was in TLCO, from an initial value of 89% to 66% at 6 and 70% at 12 months. The 16 longer term survivors showed significant recovery of function between 6 and 24 months after bone marrow transplant for TLCO, KCO, and VC, the increase ranging from 6.3% to 7.3% predicted. Airflow obstruction (FEV1/VC ratio less than 70%) developed in one patient. The major factors associated with deterioration in pulmonary function at 6 and 12 months after transplantation in the 34 survivors (stepwise multiple regression analysis) were (a) transplantation with T cell depleted donor marrow (p less than 0.005) and higher total body irradiation dose (p less than 0.02) with a fall in KCO and an increase in the FEV1/VC ratio; (b) chronic graft versus host disease with a fall in VC (p less than 0.01); and less fall in KCO (p less than 0.01); and (c) acute graft versus host disease with a fall in FEV1 (p less than 0.01). It is considered that most patients who survive the short term risks of bone marrow transplant have only minor long term impairment of pulmonary function.
Pulmonary hypertension in systemic lupus erythematosus: a report of three cases.
Three women with systemic lupus erythematosus (SLE) who developed pulmonary hypertension as a terminal feature of their illness, are reported. One patient with quiescent SLE had marked sicca syndrome when pulmonary hypertension developed. Two of the 3 patients possessed the "lupus anticoagulant" and antibodies to cardiolipin. All 3 patients had positive rheumatoid factor in their sera.