Fast-forward breeding for a food-secure world

Crop production systems need to expand their outputs sustainably to feed a burgeoning human population. Advances in genome sequencing technologies combined with efficient trait mapping procedures accelerate the availability of beneficial alleles for breeding and research. Enhanced interoperability between different omics and phenotyping platforms, leveraged by evolving machine learning tools, will help provide mechanistic explanations for complex plant traits. Targeted and rapid assembly of beneficial alleles using optimized breeding strategies and precise genome editing techniques could deliver ideal crops for the future. Realizing desired productivity gains in the field is imperative for securing an adequate future food supply for 10 billion people.

Feedback on doctors' performance from parents and carers of children: a national pilot study

OBJECTIVES

To evaluate the reliability and validity of a children's carers' feedback tool, to explore the feasibility of delivering this nationally and to determine acceptability to doctors of this assessment.

PARTICIPANTS

122 UK paediatricians on the specialist register undertaking outpatient consultations.

DESIGN

Participants were each sent 50 forms for distribution to carers. Mean scores for each question, and for the overall pilot cohort were returned to participants with verbatim free text comments. Participating paediatricians' views were sought before and after receiving feedback.

RESULTS

122 doctors returned 4415 forms (mean 36 per doctor). All doctors scored highly with scores across all returned forms having a median of 4.58 (IQ range 0.17) where the maximum score was 5. Differences were observed between scores from female compared to male carers (p<0.05), from consultations rated by carer and child compared to carer alone (p<0.05) and from carers who had previously met the doctor compared to those in their first consultation (p<0.001). 'White' doctors received higher ratings than 'non-white' doctors (p<0.05) and white patients rated both white doctors and non-white doctors more highly than non-white patients (p<0.01). A minimum of 25 consultations rated by children's carers are needed for acceptable reliability. 93.9% of participants would be happy to be assessed in this way for the purposes of revalidation.

CONCLUSIONS

National delivery of a valid and reliable method of carer feedback is feasible. The scores received and acceptability in these self-selected doctors was high. Confounding variables may influence feedback, so guidance on interpretation may be needed.

SIGN guidelines and the management of sore throat in community pharmacy

Focal points

Neutralizing CCL2 Inhibits Breast Tumor Growth Via Impact on the Tumor/Stroma Microenvironment

CCL2, (CC-chemokine ligand 2 or monocyte chemoattractant protein-1 (MCP-1)), is overexpressed in many human tumors and is believed to exert pro-tumor effects by recruiting monocytes to the tumor, where these cells become tumor associated macrophages (TAMs). TAMs secrete growth factors that stimulate angiogenesis and tumor growth, as well as proteases to promote tumor invasion and metastasis. CCL2 expression levels in primary breast tumors have been correlated with macrophage infiltration and blood vessel density, which in turn is correlated with disease stage and prognosis. These correlations indicate that CCL2 is a key player in tumor macrophage infiltration and/or tumor growth/invasion, and suggest that neutralizing CCL2 could be an effective form of therapy for breast cancer patients.The objective of these studies was to investigate whether CCL2 blockade could inhibit tumor growth in mice bearing human breast tumors. The human breast tumor cell lines MDA-MB-231 (ER-, PR-, Her2-) and MDA-MB-361 (ER+, PR+, Her2+) were implanted orthotopically in immunocompromised mice, and in both models the primary tumors metastasized to lungs and brain. Neutralizing antibodies to human CCL2 (CNTO 888) and to the mouse orthologs, MCP-1 and MCP-5, were administered therapeutically, either as a cocktail (termed CCL2 blockade) or individually to study the relative roles of host vs tumor derived CCL2 in promoting tumor growth.In both tumor models, CCL2 blockade significantly inhibited the growth of established primary tumors in the mammary fat pad. In addition, CCL2 blockade inhibited metastasis to distant sites. As measured by Taqman, visual inspection and immunohistochemistry, mice with MDA-MB-361 tumors treated with CCL2 blockade showed significantly reduced metastasis to lungs and brain, while mice bearing MDA-MB-231 tumors showed significantly reduced metastasis to lungs.To define the relative roles of human tumor-derived CCL2 vs mouse host-derived MCP-1/MCP-5, in vivo monotherapy tumor studies were conducted using the individual neutralizing antibodies. These studies included the mammary fat pad model and a tail vein metastasis model. In both cases, only the treatment with the anti-mouse MCP-1 antibody significantly inhibited primary tumor growth and distant metastasis, indistinguishable from the effect of CCL2 blockade treatment. In the tail vein metastasis model, the antibody treatment resulted in significantly fewer detectable lesions with these lesions showing a significant reduction in both tumor size and growth fraction, suggesting antibody treatment inhibits tumor seeding and growth. Mechanistic studies are in progress to further understand the basis of the anti-tumor effect mediated by the antibody treatment. These results demonstrate that host-derived MCP-1, produced from the tumor microenvironment, plays the critical role in tumor growth and metastasis in these models of human breast cancer.

Citation Information: Cancer Res 2009;69(24 Suppl):Abstract nr 6095.

Minimising metabolic and cardiovascular risk in schizophrenia: diabetes, obesity and dyslipidaemia

People with schizophrenia are at greater risk of obesity, Type 2 diabetes, dyslipidaemia and hypertension than the general population. This results in an increased incidence of cardiovascular disease (CVD) and reduced life expectancy, over and above that imposed by their mental illness through suicide. Several levels of evidence from data linkage analyses to clinical trials demonstrate that treatment-related metabolic disturbances are commonplace in this patient group, and that the use of certain second-generation antipsychotics may compound the risk of developing the metabolic syndrome and CVD. In addition, smoking, poor diet, reduced physical activity and alcohol or drug abuse are prevalent in people with schizophrenia and contribute to the overall CVD risk. Management and minimization of metabolic risk factors are pertinent when providing optimal care to patients with schizophrenia. This review recommends a framework for the assessment, monitoring and management of patients with schizophrenia in the UK clinical setting.

Unraveling the role of mitochondria during oxidative stress in plants

The sedentary habit of plants means that they must stand and fight environmental stresses that their mobile animal cousins can avoid. A range of these abiotic stresses initiate the production in plant cells of reactive oxygen and nitrogen species that ultimately lead to oxidative damage affecting the yield and quality of plant products. A complex network of enzyme systems, producing and quenching these reactive species operate in different organelles. It is the integration of these compartmented defense systems that coordinates an effective response to the various stresses. Future attempts to improve plant growth or yield must consider the complexity of inter-organelle signaling and protein targeting if they are to be successful in producing plants with resistance to a broad range of stresses. Here we highlight the role of pre-oxidant, antioxidant, and post-oxidant defense systems in plant mitochondria and the potential role of proteins targeted to both mitochondria and chloroplasts, in an integrated defense against oxidative damage in plants.

Hyperamylasemia in bulimia nervosa and hyperemesis gravidarum

OBJECTIVES

The exact causes of hyperamylasemia detected in bulimia nervosa are unknown but it is presumed to be due either to repeated binging or to vomiting. This study set out to investigate the importance of vomiting in producing the raised serum amylase and to clarify whether the amylase in pancreatic or salivary.

METHODS

Patients suffering from hyperemesis gravidarum who were repeatedly vomiting in pregnancy but not binge eating had their total serum and pancreatic amylase measured. Bulimic patients and a control sample of nonvomiting pregnant women were similarly studied. An assessment of the frequency and duration of vomiting and binging was also made.

RESULTS

Results show 45% (5) of bulimic patients had raised serum amylase, but none had a raised pancreatic amylase. Twenty-four percent (7) of the hyperemetic patients also had a raised serum amylase level, all with a normal pancreatic amylase level. None of the nonvomiting pregnant patients had a raised amylase.

DISCUSSION

Of patients with hyperemesis gravidarum who repeatedly vomit but do not binge, a significant number had raised amylase. This suggests that it is the vomiting rather than the binge behavior that increases amylase in bulimic patients. This increased amylase probably comes from the salivary gland.

Hyperamylasemia in bulimia nervosa and hyperemesis gravidarum

OBJECTIVES

The exact causes of hyperamylasemia detected in bulimia nervosa are unknown but it is presumed to be due either to repeated binging or to vomiting. This study set out to investigate the importance of vomiting in producing the raised serum amylase and to clarify whether the amylase in pancreatic or salivary.

METHODS

Patients suffering from hyperemesis gravidarum who were repeatedly vomiting in pregnancy but not binge eating had their total serum and pancreatic amylase measured. Bulimic patients and a control sample of nonvomiting pregnant women were similarly studied. An assessment of the frequency and duration of vomiting and binging was also made.

RESULTS

Results show 45% (5) of bulimic patients had raised serum amylase, but none had a raised pancreatic amylase. Twenty-four percent (7) of the hyperemetic patients also had a raised serum amylase level, all with a normal pancreatic amylase level. None of the nonvomiting pregnant patients had a raised amylase.

DISCUSSION

Of patients with hyperemesis gravidarum who repeatedly vomit but do not binge, a significant number had raised amylase. This suggests that it is the vomiting rather than the binge behavior that increases amylase in bulimic patients. This increased amylase probably comes from the salivary gland.

Development of a micromanometer-tip catheter to record high-fidelity pressures during cine-gated NMR without significant image distortion

We report a new micromanometer-tip catheter to record high-fidelity pressures during cine-gated gradient echo NMR imaging in an intact animal model. Of the various metals and alloys tested for use in its construction, brass produced the smallest NMR artifact with minimal magnification. With the use of this new catheter design, there was little signal loss and no distortion of endocardial borders during imaging.

The role of "children's hearings" in child abuse and neglect

The juvenile justice system established in Scotland in 1971, in which lay volunteers play a central part, provides a framework for making decisions about children in need of care and protection as well as those who have committed delinquent acts. Although cases of child abuse and neglect have come increasingly to the attention of children's hearings in recent years, they nevertheless constitute a small fraction of a workload dominated by cases of delinquency and truancy. A recent Scotland-wide study of the hearings system therefore gave only limited attention to the processing of abuse and neglect referrals. As a step towards rectifying this imbalance, a separate enquiry was carried out in 1981, when 43 such hearings were systematically observed and the participating panel members interviewed. Examination of these results indicates a heavy dependence on social workers' recommendations, a reluctance to open up sensitive areas for discussion, even though these may be of central importance, and an apparent lack of curiosity about the arrangements made for children removed from their homes, and the implications of these. In general, it is concluded that the anxiety generated by child abuse and neglect has prevented panel members from recognizing the distinctive features of their role in the decision-making process and has led them to fall back on an inappropriate model of practice derived from delinquency hearings. An alternative model is outlined.