Transmission of Syphilis by Solid Organ Transplantation

Two organ recipients developed serologic evidence of syphilis infection after renal transplantation from a common deceased donor with a history of treated syphilis. Testing of donor serum for syphilis, which occurred after transplantation, gave results interpreted as consistent with past infection. However, subsequent serologic results in the recipients suggested transmission of infection at transplantation due to active infection of the donor. This may be explained by recent donor re-infection in view of the current syphilis epidemic in the United Kingdom. An initial error in the treatment of recipients further served to highlight unfamiliarity in managing this resurgent infection in the context of organ transplantation.     

The contribution of transforming growth factor-beta and epidermal growth factor signalling to airway remodelling in chronic asthma.

Asthma is increasing in prevalence in the developing world, affecting approximately 10% of the world's population. It is characterised by chronic lung inflammation and airway remodelling associated with wheezing, shortness of breath, acute bronchial hyperresponsiveness to a variety of innocuous stimuli and a more rapid decline in lung function over time. Airway remodelling, involving proliferation and differentiation of mesenchymal cells, particularly myofibroblasts and smooth muscle cells, is generally refractory to corticosteroids and makes a major contribution to disease chronicity. Transforming growth factor-beta is a potent profibrogenic factor whose expression is increased in the asthmatic airways and is a prime candidate for the initiation and persistence of airway remodelling in asthma. This review highlights the role of transforming growth factor-beta in the asthmatic lung, incorporating biosynthesis, signalling pathways and functional outcome. In vivo, however, it is the balance between transforming growth factor-beta and other growth factors, such as epidermal growth factor, which will determine the extent of fibrosis in the airways. A fuller comprehension of the actions of transforming growth factor-beta, and its interaction with other signalling pathways, such as the epidermal growth factor receptor signalling cascade, may enable development of therapies that control airway remodelling where there is an unmet clinical need.     

Leukemia in children and paternal radiation exposure at the Sellafield nuclear site.

Childhood cancer around nuclear installations has been studied in recent years, particularly in the United Kingdom but also in other countries. The early studies were prompted by the suggestion of a 10-fold raised level of childhood leukemia around the Sellafield nuclear site in England, which was confirmed and followed by the identification of generally smaller excesses around some (but not all) other nuclear sites in the United Kingdom. Marked excesses have not been reported in other countries. The increased leukemia rate around Sellafield has been further investigated by examining individual cases in detail in epidemiological cohort and case-control studies. The raised incidence seems to have been concentrated in children born in the local area but not among children who moved in after birth and was particularly associated with fathers who had experienced higher levels of occupational external ionizing radiation exposure at Sellafield before their children's conception. The underlying cause of this statistical association is not yet clear, but the findings have important potential implications for radiobiology and for protection of radiation workers and their children.     

Current smoking habits and genital infections in women.

A study was undertaken to assess the relationship between current cigarette smoking and genital infections. Four hundred women attending a sexually transmitted disease clinic were the subjects of the study; of these 212 (53%) were cigarette smokers. In women under 20 years of age 70% were smokers. Women who smoked were more likely to have multiple partners and be in a lower socio-economic class or unemployed. The presence of genital warts was commoner in smokers. No association was shown between smoking and cervical inflammation or dysplasia. The findings suggest that cigarette smoking is a behavioural factor which should routinely be identified in the demographic details of women attending sexually transmitted disease clinics.     

The Hampshire Depression Project: development and piloting of clinical practice guidelines and education about depression in primary health care

This paper describes the development and piloting of a comprehensive educational programme about recognition and management of depressive illness in primary care. Full evaluation of the effectiveness of the programme is currently underway in a randomized controlled trial, the Hampshire Depression Project (HDP), involving 56 general practices. The programme consists of clinical practice guidelines, practice-based seminars and follow-up sessions. Each part of the programme has been designed to be flexible, clinically oriented and relevant to all members of the multidisciplinary primary care team. The pilot study established the need for a systematic approach to the access of practices and practice teams, and the organization and process of the seminars. Application of this approach was associated with excellent attendance in the main programme.     

Assessment of deposition of inhaled aerosol in the respiratory tract of man using three-dimensional multimodality imaging and mathematical modeling.

Multimodality medical imaging enables measurement of the three-dimensional spatial distribution of a radiolabeled aerosol within the lung. Using a conceptual spatial morphological model these data may be transformed to provide information on deposition per airway generation. This methodology has been used to study the intrapulmonary deposition patterns of two formulations of a metered dose inhaler and two nebulizers in control subjects. The nebulizer study has also been stimulated using a computer model of deposition. The comparison between derived experimental results and those from computer modeling shows areas of agreement, although there are also areas of discrepancy. The new methodology has considerable potential value in the fields of inhalation therapy and deposition modeling, although more detailed validation is still required.     

Exclusion from proximal 11q of a common gene with megaphenic effect on atopy

We have typed three markers on proximal 11q in 131 random families with three or more children studied for atopy. A summary map that includes the FCER1B candidate was constructed. Using a 2-locus disease model, we performed combined segregation and linkage analysis of three models, none of which suggested linkage. Nine marker loci on other chromosomes were also negative. In the regions swept by these 12 markers we cannot rule out a rare gene, perhaps of large effect, nor a common gene of small effect. However, a common gene of large effect is excluded. These results and alternative strategies are discussed in the perspective of inconsistent evidence for a major atopy gene.