Treating Brain Metastases from Breast Cancer: Outcomes after Stereotactic Radiosurgery

AIMS

Stereotactic radiosurgery (SRS) is an alternative to surgery or whole brain radiotherapy for the control of single or multiple brain metastases in patients with breast cancer. To date, there is no clear consensus on factors that might predict overall survival following SRS. The aim of this study was to assess the overall survival of breast cancer patients with brain metastases treated with SRS at a single centre and to examine the factors that might influence survival.

MATERIALS AND METHODS

A retrospective analysis of consecutive patients with breast cancer and brain metastases, considered suitable for SRS by the regional neuro-oncology multidisciplinary team. All patients were treated at a single National Health Service centre.

RESULTS

In total, 91 patients received SRS between 2013 and 2017, of whom 15 (16.5%) were alive at the time of analysis. The median overall survival post-SRS was 15.7 months (interquartile range 7.7-23.8 months) with no significant effect of age on survival (67 patients ≤ 65 years, 16.3 months; 26 patients > 65 years, 11.4 months, P = 0.129). The primary tumour receptor status was an important determinant of outcome: 31 oestrogen receptor positive (ER+)/human epidermal growth factor receptor 2 negative (HER2-) patients had a median overall survival of 13.8 months, 14 ER+/HER2+ patients had a median overall survival of 21.4 months, 30 ER-/HER2+ patients had a median overall survival of 20.4 months and 16 patients with triple negative breast cancer (TNBC) had a median overall survival of 8.5 months. A larger total volume of tumour treated (>10 cm³), but not the number of individual metastases treated, was associated with worse survival (P = 0.0002) in this series. Patients with stable extracranial disease at the time of SRS had improved overall survival compared with those with progressive extracranial disease (30 patients stable extracranial disease overall survival = 20.1 months versus 33 patients progressive extracranial disease overall survival = 11.4 months; P = 0.0011). Seventeen patients had no extracranial disease at the time of SRS, with a median overall survival of 13.1 months.

CONCLUSIONS

This single-centre series of consecutive patients with brain metastases from breast cancer, treated with SRS, had a similar overall survival compared with previous studies of SRS. TNBC and ER+/HER2- histology, metastatic volumes >10 cm³ and progressive extracranial disease at the time of SRS were associated with worse survival.

141 Positive effects of supplementation in bovine culture medium with 3 cytokines

Recently, our laboratory has identified that supplementation of 3 cytokines, 40ng mL−1 FGF2, 20ng mL−1 LIF, and 20ng mL−1 IGF1 (termed FLI), to porcine oocyte maturation medium leads to an increase in maturation percentage and embryo development to blastocyst. Similarly, addition of FLI to porcine embryo culture at Day 2 after fertilization increased the number of embryos that became blastocyst. The objective of this study was to determine whether the effect of FLI on embryonic development was maintained in the bovine. Two variations of the bovine culture medium, basic SOF and SOF-BE2 (containing 0.4mM trisodium citrate and 2.56mM myo-inositol), were supplemented with FLI at the beginning of culture, and development to the blastocyst stage on Day 8 was determined. Embryos were produced from abattoir-derived oocytes from Bos taurus breeds and fertilized with sperm from a single Holstein bull proven of high fertility under in vitro conditions. All statistical analyses were completed by logistic regression using the Genmod procedure of SAS v. 9.4 (SAS Institute Inc., Cary, NC, USA). In the first experiment, zygotes (oocytes exposed to sperm) were placed in culture in basic SOF with or without supplementation with FLI. After 4 replicates containing 90 control embryos and 93 FLI-treated embryos we found an increase (P<0.05) in blastocyst percentages of 21.1±0.2% for the control compared with 40.9±0.2% for the FLI-treated embryos. In a second experiment, zygotes were cultured in SOF-BE2 with or without supplementation with FLI. A total of 679 zygotes (332 control and 347 FLI-treated zygotes) across 4 replicates were evaluated. Percentage of embryos developing to the blastocyst stage increased (P<0.05) from 33.2±0.07% in the control group to 42.6±0.07% in the FLI-supplemented group. Next, blastocysts derived from the second experiment were vitrified for subsequent transfer to synchronized Angus recipient heifers. Re-expansion 16h after thawing was recorded before transfer. For the control group, 10 out of 24 embryos (41.7%), and 28 out of 41 embryos (68.3%) of the FLI-treated embryos, re-expanded. Three re-expanded blastocysts were then nonsurgically transferred to the uterine horn of each synchronized heifer (N=3 control embryo containing heifers, 9 FLI embryo containing heifers). The number of viable fetuses (presence of a heartbeat) per heifer will be determined via ultrasound around Day 35. Although more vitrification and transfer experiments are being completed, preliminary data suggest that supplementation of FLI during culture might improve of the embryos to freezing. Furthermore, supplementation of FLI improves development to the blastocyst stage in bovine embryos under different conditions. This work was supported in part by funds from the Agriculture and Food Research Initiative Competitive Grant no. 2013-68004-20365 from the United States Department of Agriculture National Institute of Food and Agriculture and National Institutes of Health Grant R01 HD072898, Food for the 21st Century, and the Clifton Murphy Scholarship Fund.

Critical care usage after major gastrointestinal and liver surgery: a prospective, multicentre observational study

BACKGROUND

Patient selection for critical care admission must balance patient safety with optimal resource allocation. This study aimed to determine the relationship between critical care admission, and postoperative mortality after abdominal surgery.

METHODS

This prespecified secondary analysis of a multicentre, prospective, observational study included consecutive patients enrolled in the DISCOVER study from UK and Republic of Ireland undergoing major gastrointestinal and liver surgery between October and December 2014. The primary outcome was 30-day mortality. Multivariate logistic regression was used to explore associations between critical care admission (planned and unplanned) and mortality, and inter-centre variation in critical care admission after emergency laparotomy.

RESULTS

Of 4529 patients included, 37.8% (n=1713) underwent planned critical care admissions from theatre. Some 3.1% (n=86/2816) admitted to ward-level care subsequently underwent unplanned critical care admission. Overall 30-day mortality was 2.9% (n=133/4519), and the risk-adjusted association between 30-day mortality and critical care admission was higher in unplanned [odds ratio (OR): 8.65, 95% confidence interval (CI): 3.51-19.97) than planned admissions (OR: 2.32, 95% CI: 1.43-3.85). Some 26.7% of patients (n=1210/4529) underwent emergency laparotomies. After adjustment, 49.3% (95% CI: 46.8-51.9%, P<0.001) were predicted to have planned critical care admissions, with 7% (n=10/145) of centres outside the 95% CI.

CONCLUSIONS

After risk adjustment, no 30-day survival benefit was identified for either planned or unplanned postoperative admissions to critical care within this cohort. This likely represents appropriate admission of the highest-risk patients. Planned admissions in selected, intermediate-risk patients may present a strategy to mitigate the risk of unplanned admission. Substantial inter-centre variation exists in planned critical care admissions after emergency laparotomies.

Intracranial spread of IgG4-related disease via skull base foramina

IgG4-related disease (IgG4-RD) is a newly recognised, multiorgan, inflammatory disease, and its full clinical spectrum remains undefined. We present a biopsy-proven case of IgG4-RD presenting with a parapharyngeal mass with intracranial extension and possible involvement of the brain parenchyma. We highlight the importance of considering the diagnosis in those presenting with tumefactive lesions, leptomeningitis or pachymeningitis and emphasise the value of securing a tissue diagnosis so that appropriate long-term treatment can be instigated and complications avoided.

Current status of haemophilia gene therapy

After many reports of successful gene therapy studies in small and large animal models of haemophilia, we have, at last, seen the first signs of success in human patients. These very encouraging results have been achieved with the use of adeno-associated viral (AAV) vectors in patients with severe haemophilia B. Following on from these initial promising studies, there are now three ongoing trials of AAV-mediated gene transfer in haemophilia B all aiming to express the factor IX gene from the liver. Nevertheless, as discussed in the first section of this article, there are still a number of significant hurdles to overcome if haemophilia B gene therapy is to become more widely available. The second section of this article deals with the challenges relating to factor VIII gene transfer. While the recent results in haemophilia B are extremely encouraging, there is, as yet, no similar data for factor VIII gene therapy. It is widely accepted that this therapeutic target will be significantly more problematic for a variety of reasons including accommodating the larger factor VIII cDNA, achieving adequate levels of transgene expression and preventing the far more frequent complication of antifactor VIII immunity. In the final section of the article, the alternative approach of lentiviral vector-mediated gene transfer is discussed. While AAV-mediated approaches to transgene delivery have led the way in clinical haemophilia gene therapy, there are still a number of potential advantages of using an alternative delivery vehicle including the fact that ex vivo host cell transduction will avoid the likelihood of immune responses to the vector. Overall, these are exciting times for haemophilia gene therapy with the likelihood of further clinical successes in the near future.

Deficient emotional self-regulation and pediatric attention deficit hyperactivity disorder: a family risk analysis

BACKGROUND

Although deficient emotional self-regulation (DESR) is associated with attention deficit hyperactivity disorder (ADHD), little research investigates this association and little is known about its etiology. Family studies provide a method of clarifying the co-occurrence of clinical features, but no family studies have yet addressed ADHD and DESR in children.

METHOD

Subjects were 242 children with ADHD and 224 children without ADHD. DESR was operationalized using an aggregate score ≥180 and <210 in the anxious/depressed, attention and aggression scales (AAA profile) of the Child Behavior Checklist (CBCL), termed the CBCL-DESR profile. The CBCL-bipolar (CBCL-BP) profile was defined as ≥210 on the CBCL-AAA scale. We examined the familial transmission of ADHD and the CBCL-AAA scale in families selected through probands with and without these conditions.

RESULTS

We found a linear increase in the prevalence of CBCL-DESR in siblings as indexed by the Control, ADHD, ADHD+CBCL-DESR and ADHD+CBCL-BP proband groups. While the ADHD siblings were at elevated risk for both the CBCL-DESR and CBCL-BP compared with non-ADHD siblings, a significantly higher rate of CBCL-BP in the siblings of ADHD+CBCL-BP probands was found compared with siblings of the Control probands.

CONCLUSIONS

ADHD shows the same degree of familial transmission in the presence or absence of DESR. CBCL-DESR and CBCL-BP are familial, but further work is needed to determine if these definitions are distinctly familial or represent a continuum of the same psychopathology.

Bioavailability of inhaled fluticasone propionate via chambers/masks in young children

We determined lung bioavailability of a fluticasone propionate (FP) pressurised metred-dose inhaler (Flovent HFA; GlaxoSmithKline, Research Triangle Park, NC, USA) administered via AeroChamber Plus (Monaghan Medical, Plattsburgh, NY, USA) with Facemask and Babyhaler (GlaxoSmithKline) valved holding chambers (VHCs) using a population pharmacokinetic approach. Children from 1 to <4 yrs of age with stable asthma but a clinical need for inhaled corticosteroid therapy were administered 88 μg FP hydrofluoroalkane (2 × 44 μg) twice daily delivered through the two devices in an open-label, randomised crossover manner for 8 days each. Patients were randomised to one of three sparse sampling schedules for blood collection throughout the 12-h dosing interval on the 8th day of each treatment for pharmacokinetic analysis. The area under the FP plasma concentration-time curve (AUC) was determined for each regimen. 17 children completed the study. The population mean AUC following FP with AeroChamber Plus with Facemask was 97.45 pg·h·mL(-1) (95% CI 85.49-113.32 pg·h·mL(-1)) and with Babyhaler was 51.55 pg·h·mL(-1) (95% CI 34.45-64.46 pg·h·mL(-1)). The relative bioavailability (Babyhaler/AeroChamber Plus) was 0.53 (95% CI 0.30-0.75). Clinically significant differences in lung bioavailability were observed between the devices. VHCs are not interchangeable, as differences in drug delivery to the lung may occur. A population pharmacokinetic approach can be used to determine lung bioavailability of FP.

337 PRODUCTION OF TRANSGENIC SHEEP USING RECOMBINANT LENTIVIRUS MICROINJECTION OF IN VIVO PRODUCED EMBRYOS

The development of transgenic technology has enormous potential for livestock improvement. Several methods have been employed for generating transgenic livestock to date, the most popular being pronuclear injection or somatic cell nuclear transfer using genetically modified cells. However, the high cost and relatively low efficiencies seen with these methods have prompted development of alternative methods for producing transgenic livestock. Recently, the introduction of transgenes using viral vectors, in particular lentiviral vectors, has provided an avenue for increasing the efficiency of transgenic livestock production. Microinjection of concentrated lentivirus into the perivitelline space of oocytes and zygotes has been demonstrated as an effective means of creating transgenic livestock (cattle, sheep, and swine). In this study, we investigated the efficiency of producing transgenic sheep through microinjection of recombinant lentivirus into in vivo produced zygotes. Recombinant lentivirus was produced through co-transfection of HEK293T cells with various lentiviral transfer plasmids (each coding for a short hairpin RNA and a fluorescent marker protein) as well as a packaging plasmid and a plasmid encoding the vesicular stomatitis virus glycoprotein (VSV-G), which was used to pseudotype viral particles. For lentivirus concentration, a total of 36 mL of viral supernatant was produced per viral construct. Viral supernatant was ultracentrifuged on a 15% sucrose cushion at 4°C for 1.5 h at a speed of 50 000 × g. The resulting viral pellet was resuspended in 30 μL of PBS and virus was frozen at –80°C until needed. Zygotes were surgically flushed from oviducts of superovulated donor ewes 24 h post-mating. Concentrated recombinant lentivirus (titer ≥ IU mL–1) was then microinjected into the perivitelline space. Injected embryos were surgically transferred into the oviduct of synchronized recipient ewes immediately after injection (3–4 embryos per ewe). Pregnancies were confirmed by ultrasound at 35 days of gestation. The pregnancy rate was 39% (45/114 ewes exhibiting at least one viable fetus). A subset of pregnant ewes was killed at 60 to 70 days gestation to harvest a total of 36 fetuses. Analysis of transgene incorporation was performed by PCR using genomic DNA isolated from skin and liver tissue samples. Two independent PCR reactions were performed per sample, and PCR analysis revealed 14 of the collected fetuses to be transgenic (39%). The remaining pregnancies were allowed to progress to term, and 32 lambs were born. Genomic DNA was isolated from blood samples collected on each lamb, and PCR analysis was performed as above. Of the lambs born, 13 of 32 (40%) were confirmed to be transgenic by PCR analysis. Southern blot analysis is currently underway to confirm PCR data. These results demonstrate that microinjection of recombinant lentivirus into in vivo produced sheep zygotes is an effective and efficient method for generating transgenic sheep.

434 REPLICATION COMPETENT LENTIVIRUS (RCL) ANALYSIS IN RECIPIENT ANIMALS OF TRANSGENIC EMBRYOS PRODUCED BY LENTIVIRAL TRANSFER

Lentiviral vectors have become a useful tool for gene therapies and the expression of small hairpin (sh)RNAs to target genes both in vitro and in vivo. This is due primarily to their ability to integrate transgenes into both dividing and nondividing cells, as well as the lack of silencing in the germ cell line. However, the retroviral basis for these recombinant, replication-incompetent viruses has prompted investigation into their safety for use in therapeutics and transgenic animal production. Concerns are that recombination with wild-type viruses or endogenous retroviral elements may allow the integrated provirus genome to become replication competent. In order to investigate this, transgenic embryos produced by lentiviral-mediated gene transfer were transferred into recipient animals. The lentiviral plasmids used in this experiment contained a self-inactivating 3′ untranslated region as well as a green fluorescent protein (GFP) reporter gene (Miyoshi et al. 1998 J.Virol. 72, 8150-8157). Recombinant lentivirus was produced through cotransfection of HEK293T cells with the lentiviral transfer plasmid as well as a packaging plasmid and a plasmid encoding the vesicular stomatitis virus glycoprotein (VSV-G), which was used to pseudotype viral particles. Two methods were used for production of transgenic embryos. The first was lentiviral transduction of bovine fetal fibroblasts followed by somatic cell nuclear transfer. The second was incubation of IVP hatched ovine blastocysts in culture medium containing infectious recombinant lentiviral particles. Recipients were then sacrificed and analyzed for the presence of replication competent lentivirus (RCL). Tissues collected from each recipient included blood, lung, lymph node, kidney, liver, mammary gland, ovary, skeletal muscle, spleen, and uterus. In addition, when available, fetal and placental samples were collected. Analyses for RCL included a serum ELISA test for presence of the p24 HIV antigen as well as real-time quantitative PCR (qRT-PCR) on genomic DNA for the presence of VSV-G. To date, a total of 13 recipients including both sheep and cattle have been analyzed. All animals had p24 titers below the level of detection for the assay (<12.5 pg mL-1). Additionally, the tissues mentioned above have been analyzed by qRT-PCR for 6 of the 13 recipients so far, and all have been negative for VSV-G as determined by comparison with positive and negative control samples. Additional collections and analysis are ongoing. A lack of detection of RCL in these animals will build confidence in the use of lentiviral vectors in transgenic animal production and will lend support for their safety in both animal and human therapies.

Stability of executive function deficits into young adult years: a prospective longitudinal follow-up study of grown up males with ADHD

OBJECTIVE

Although individuals with attention deficit-hyperactivity disorder (ADHD) commonly exhibit deficits in executive functions that greatly increase the morbidity of the disorder, all available information on the subject is cross sectional.

METHOD

Males (n = 85) 9-22 years with ADHD followed over 7 years into young adulthood were assessed on measures of sustained attention/vigilance, planning and organization, response inhibition, set shifting and categorization, selective attention and visual scanning, verbal and visual learning, and memory. A binary definition of executive function deficits (EFDs) was defined based on a subject manifesting at least two abnormal tests 1.5 standard deviations from controls.

RESULTS

The majority of subjects maintained EFDs over time (kappa: 0.41, P < 0.001; sensitivity: 55%, specificity: 85%, positive predictive value: 69%, and negative predictive value: 75%).

CONCLUSION

Considering the morbidity of EFDs, these findings stress the importance of their early recognition for prevention and early intervention strategies. EFDs are stable over time.

Variability, interaction and change in the atmosphere-ocean-ecology system of the Western Indian Ocean

Traditional ideas of intraseasonal and interannual climatic variability in the Western Indian Ocean, dominated by the mean cycle of seasonally reversing monsoon winds, are being replaced by a more complex picture, comprising air-sea interactions and feedbacks; atmosphere-ocean dynamics operating over intrannual to interdecadal time-scales; and climatological and oceanographic boundary condition changes at centennial to millennial time-scales. These forcings, which are mediated by the orography of East Africa and the Asian continent and by seafloor topography (most notably in this area by the banks and shoals of the Mascarene Plateau which interrupts the westward-flowing South Equatorial Current), determine fluxes of water, nutrients and biogeochemical constituents, the essential controls on ocean and shallow-sea productivity and ecosystem health. Better prediction of climatic variability for rain-fed agriculture, and the development of sustainable marine resource use, is of critical importance to the developing countries of this region but requires further basic information gathering and coordinated ocean observation systems.

High-level expression of cancer/testis antigen NY-ESO-1 and human granulocyte-macrophage colony-stimulating factor in dendritic cells with a bicistronic retroviral vector

Tumor-specific genes delivered to dendritic cells (DCs) have been used for the generation of cytotoxic T cells (CTLs), but their application has been limited on the one hand by low viral titers resulting in low transduction efficiency and poor protein production, and on the other hand by immunogenicity of the selectable marker and poor viability of the DCs. We addressed these limitations by creating a multipurpose master vector (pMV) and cloning the tumor gene NY-ESO-1, which is highly expressed in more than 50% of advanced myeloma patients. pMV was constructed from a Moloney murine leukemia virus (Mo-MuLV)-based retroviral backbone with the following features: (1) an extended packaging signal to achieve high viral titers, (2) a splice acceptor region to facilitate protein production, (3) a nonimmunogenic selectable marker, dihydrofolate reductase-L22Y (DHFR(L22Y)), to exclude the generation of CTLs against the selectable marker, (4) an internal ribosomal entry site between the tumor-specific gene (NY-ESO-1) and the selectable marker DHFR(L22Y) for coexpression of two heterologous gene products from a single bicistronic mRNA, minimizing the possibility of differential expression of these two genes, and (5) human granulocyte-macrophage colony-stimulating factor (hGM-CSF) cDNA driven by the human T-lymphotropic virus promoter to enhance DC function and viability. Recombinant virus of pMV-NY-ESO-1 was generated with vesicular stomatitis virus G envelope protein (VSV-G) in the GP2-293 cell line for efficient transduction. We present evidence that the DC phenotype is unaltered after transduction and that more than 85% of DCs express NY-ESO-1, which secrete approximately 40 ng of GM-CSF per 10(6) DCs.

Re-examining comorbidity of Obsessive Compulsive and Attention-Deficit Hyperactivity Disorder using an empirically derived taxonomy

BACKGROUND

Using an empirically derived instrument to reduce the assessor bias inherent in structured diagnostic interviews, we sought to re-examine and validate the putative comorbidity between Obsessive Compulsive Disorder (OCD) and Attention-Deficit/Hyperactivity Disorder (ADHD) in children and adolescents.

METHOD

We examined the correlation between Child Behavior Checklist (CBCL) syndrome, competence, and composite scores in children with: 1) OCD plus ADHD (OCD + ADHD), N = 47; 2) OCD without comorbid ADHD (OCD), N = 33; 3) ADHD without comorbid OCD (ADHD) N = 43; and 4) comparison controls recruited from general pediatric clinics,N = 32.

RESULTS

CBCL findings in our ADHD children were similar to previous findings reported in ADHD youth, irrespective of the presence or absence of comorbid OCD. Comorbid youth generally had additive scores on the CBCL scales, reflecting the independent contribution of symptomatic and functional impairment from each disorder.

CONCLUSION

These findings suggest that when ADHD-like symptoms are seen in OCD youth, they reflect a true comorbid state of OCD plus ADHD. The CBCL may provide a rapid assessment tool to identify comorbid ADHD in OCD youth.

Guidelines and algorithms for the use of methylphenidate in children with Attention-Deficit/ Hyperactivity Disorder

OBJECTIVE

To review published algorithms for guiding the use of methylphenidate (MPH) in the treatment of Attention-Deficit/Hyperactivity Disorder (ADHD) in children and adolescents.

METHODS

A consensus roundtable of 12 experts was convened to review the evidence for the safety and efficacy of MPH in the treatment of ADHD, as well as the published algorithms and practice guidelines for using MPH. The experts reviewed the algorithms for practicality and acceptability by clinicians.

RESULTS

Algorithms that included MPH commonly selected it as the initial medication to be employed in the treatment of children with ADHD. Factors involved included its high efficacy, good safety record, and the ubiquitous nature of its appearance in the ADHD treatment literature.

CONCLUSIONS

MPH should be considered as the first medication to be used in a treatment algorithm for children and adolescents with ADHD.

Methylphenidate in treatment of adults with Attention-Deficit/Hyperactivity Disorder

Attention-Deficit/Hyperactivity Disorder (ADHD) can persist into adulthood with a continuation of the pattern of childhood psychopathology, cognition and functioning. Adult comorbidities include substance use disorders, antisocial personality disorder, anxiety, and depression. Studies have shown that as in children, methylphenidate treatment for adults can lead to a robust, dose-dependent improvement in ADHD symptoms. Future research is needed to evaluate the safety and efficacy of long-term treatment with methylphenidate (MPH).

Non-stimulant treatment for Attention-Deficit/Hyperactivity Disorder

A variety of compounds with a common noradrenergic/dopaminergic activity have shown documented anti-Attention-Deficit/Hyperactivity Disorder (ADHD) activity. There is a substantial body of literature documenting the efficacy of tricyclic antidepressants on ADHD in over 1,000 subjects. There is an equally large database on the efficacy of the specific norepinephrlne reuptake inhibitor, atomoxetine, of greater than 2,000 Individuals. In addition, the atypical antidepressant buproplon also has been documented to be effective in the treatment of ADHD in controlled clinical trials. Despite wide use, the scientific base supporting the efficacy of alpha-2, noradrenergic agonists is somewhat limited. Several lines of evidence provide preliminary support for the potential benefits of cholinergic cognitive enhandng drugs, such as anticholinesterase inhibitors (tacrine, donepezil) as well as novel nicotinic analogues (ABT-418). Despite these promising results, more research is needed on alternative pharmacological treatments for the treatment of ADHD.

Endogenous retroviruses related to jaagsiekte sheep retrovirus

Ovine betaretroviruses consist of exogenous viruses [jaagsiekte sheep retrovirus (JSRV) and enzootic nasal tumor virus, (ENTV)] associated with neoplastic diseases of the respiratory tract and 15-20 endogenous viruses (enJSRV) stably integrated in the ovine and caprine genome. Phylogenetic analysis of this group of retroviruses suggests that the enJSRV can be considered as 'modern' endogenous retroviruses with active, exogenous counterparts. Sequence analysis of JSRV, ENTV and enJSRV suggests that enJSRV do not directly contribute to the pathogenesis of ovine pulmonary adenocarcinoma (OPA) or enzootic nasal tumor through large-scale recombination events, but small-scale recombination or complementation of gene function cannot be excluded; experiments involving enJSRV-free sheep, which have not been found, would be needed to investigate this possibility. Evidence of expression of enJSRV structural proteins in tissues of the reproductive tract and lung implies that they do not have a primary role in disease. However, experimental exploitation of exogenous/endogenous retrovirus sequence differences by producing chimeras has been useful in establishing the determinants of JSRV Env-induced transformation. Even if enJSRV do not have a direct role in OPA, their expression during ontogeny or in neonatal life may impact the likelihood of exogenous JSRV infection and disease outcome via the induction of immunological tolerance. Aside from any role in disease, enJSRV loci may serve as useful genetic markers in the sheep and their frequent expression in the reproductive tract of the ewe may portend an important physiologic role in sheep.

Ophthalmologic sequelae of thermal burns over ten years at the Alfred Hospital

PURPOSE

To study the ocular outcomes of facial burns over a 10-year period at the Alfred Hospital; in particular, to investigate the impact of 3 variables (grading of burn, use of prophylactic ocular surface lubrication, and timing of ophthalmologic referral) on the requirements for eyelid surgery.

METHODS

A retrospective review of patients admitted to the Alfred Hospital (from October 1990 to October 2000) after thermal burns with facial, eyelid, and ocular involvement.

RESULTS

Sixty-six patients were identified with facial burns involving the lids or eyes, having been admitted over a 10-year period. Of these 66, 7 died of complications of the burns and 12 required eye or eyelid surgery. Of those patients treated with prophylactic ocular surface lubrication, the rate of ocular surgery was 18.4% as opposed to 30% when no prophylaxis was used. The higher the percentage of total burn, the later the referral was made. Of those with severe eyelid burns, 100% had eyelid surgery and 50% of moderate burns had eyelid surgery. Sixty percent of moderate eyelid burns that required surgery did not receive prophylaxis. Thirty-four of 66 patients had acute corneal involvement, but only 3 eyes of 118 had long-term corneal morbidity.

CONCLUSIONS

The requirement for eyelid surgery was closely related to the severity of the eyelid burn. The presence of an acute corneal burn with epithelial loss was not a poor prognosticator. The use of prophylactic ocular surface lubrication may provide early corneal protection, thereby minimizing ulceration in patients who may otherwise have required surgery, especially in those with mild to moderate exposure. Prompt ophthalmologic examination and the early use of prophylactic ocular surface lubrication for the cornea are associated with less need for eyelid surgery in patients with moderate eyelid burns.

An open-label, dose-ranging study of atomoxetine in children with attention deficit hyperactivity disorder

OBJECTIVE

The goal of this study was to evaluate the tolerability and effectiveness of the experimental, noradrenergic specific reuptake inhibitor atomoxetine in the treatment of children with attention deficit hyperactivity disorder (ADHD).

METHODS

This was an open, prospective, dose-ranging study of atomoxetine monotherapy in the treatment of 30 children with ADHD between the ages of 7 and 14 years. Atomoxetine was started at 10-20 mg/day and titrated weekly up to 90 mg over 11 weeks, depending on response and adverse effects. Twenty-two children completed the full 11 weeks. We assessed efficacy with weekly clinician and parent ratings of ADHD and oppositional symptoms and monitored adverse effects, laboratory findings, and cardiovascular parameters.

RESULTS

Treatment with atomoxetine (mean final, total daily dose of 1.9 mg/kg/day) was very well tolerated without meaningful adverse effects. Atomoxetine significantly reduced core symptoms of ADHD (ADHD-Rating Scale-IV; 38.6% decrease vs. baseline, p < 0.001) with significant improvement (p < 0.05) in all but 1 of the 18 individual items in the ADHD-Rating Scale-IV. More than 75% of subjects who completed 10 weeks of treatment showed > 25% decrease in ADHD symptoms.

CONCLUSIONS

These findings extend to children the positive results previously reported in adults diagnosed with ADHD who were treated with atomoxetine. These results support additional controlled trials of atomoxetine in cases of pediatric ADHD.

Atomoxetine in the treatment of children and adolescents with attention-deficit/hyperactivity disorder: a randomized, placebo-controlled, dose-response study

OBJECTIVE

Atomoxetine is an investigational, nonstimulant pharmacotherapy being studied as potential treatment for attention-deficit/hyperactivity disorder (ADHD). It is thought to act via blockade of the presynaptic norepinephrine transporter in the brain. We assessed the efficacy of 3 doses of atomoxetine compared with placebo in children and adolescents with ADHD.

METHODS

A total of 297 children and adolescents who were 8 to 18 years of age and had ADHD as defined by the Diagnostic and Statistical Manual of Mental Disorders, 4th edition, were randomized to placebo or atomoxetine dosed on a weight-adjusted basis at 0.5 mg/kg/day, 1.2 mg/kg/day, or 1.8 mg/kg/day for an 8-week period. ADHD symptoms, affective symptoms, and social and family functioning were assessed using parent and investigator rating scales.

RESULTS

Approximately 71% of children enrolled were male, approximately 67% met criteria for mixed subtype (both inattentive and hyperactive/impulsive symptoms), and the only common psychiatric comorbidity was oppositional defiant disorder (approximately 38% of the sample). At baseline, symptom severity was rated as moderate to severe for most children. At endpoint, atomoxetine 1.2 mg/kg/day and 1.8 mg/kg/day were consistently associated with superior outcomes in ADHD symptoms compared with placebo and were not different from each other. The dose of 0.5 mg/kg/day was associated with intermediate efficacy between placebo and the 2 higher doses, suggesting a graded dose-response. Social and family functioning also were improved in the atomoxetine groups compared with placebo with statistically significant improvements in measures of children's ability to meet psychosocial role expectations and parental impact. Discontinuations as a result of adverse events were <5% for all groups.

CONCLUSION

Among children and adolescents aged 8 to 18, atomoxetine was superior to placebo in reducing ADHD symptoms and in improving social and family functioning symptoms. Atomoxetine was associated with a graded dose-response, and 1.2 mg/kg/day seems to be as effective as 1.8 mg/kg/day and is likely to be the appropriate initial target dose for most patients. Treatment with atomoxetine was safe and well tolerated.

A family study of psychiatric comorbidity in girls and boys with attention-deficit/hyperactivity disorder

BACKGROUND

Because attention-deficit/hyperactivity disorder (ADHD) is relatively infrequent among girls, little is known about the nature and causes of psychiatric comorbidity in girls and the reason for gender differences in the prevalence of these comorbidities.

METHODS

Using blinded, structured psychiatric interviews, we studied two groups of boys: 140 ADHD probands and 120 non-ADHD comparisons. These groups had 454 and 368 first-degree biological relatives, respectively. We also studied two groups of girls: 140 ADHD probands and 122 non-ADHD comparisons. These groups had 417 and 369 first-degree biological relatives, respectively.

RESULTS

The co-occurrence of ADHD and comorbid psychopathology in families was the same for families ascertained through boy and girl probands.

CONCLUSIONS

Our results suggest that boys and girls do not differ in the familial risk factors that mediate comorbid psychopathology and the familial aggregation of comorbid disorders in ADHD families. Although this is consistent with prior work suggesting more similarities than differences in the nature of psychiatric comorbidity in ADHD boys and girls, we cannot make strong conclusions, owing to the possibility of cohort effects.

Monarch larvae sensitivity to Bacillus thuringiensis- purified proteins and pollen

Laboratory tests were conducted to establish the relative toxicity of Bacillus thuringiensis (Bt) toxins and pollen from Bt corn to monarch larvae. Toxins tested included Cry1Ab, Cry1Ac, Cry9C, and Cry1F. Three methods were used: (i) purified toxins incorporated into artificial diet, (ii) pollen collected from Bt corn hybrids applied directly to milkweed leaf discs, and (iii) Bt pollen contaminated with corn tassel material applied directly to milkweed leaf discs. Bioassays of purified Bt toxins indicate that Cry9C and Cry1F proteins are relatively nontoxic to monarch first instars, whereas first instars are sensitive to Cry1Ab and Cry1Ac proteins. Older instars were 12 to 23 times less susceptible to Cry1Ab toxin compared with first instars. Pollen bioassays suggest that pollen contaminants, an artifact of pollen processing, can dramatically influence larval survival and weight gains and produce spurious results. The only transgenic corn pollen that consistently affected monarch larvae was from Cry1Ab event 176 hybrids, currently <2% corn planted and for which re-registration has not been applied. Results from the other types of Bt corn suggest that pollen from the Cry1Ab (events Bt11 and Mon810) and Cry1F, and experimental Cry9C hybrids, will have no acute effects on monarch butterfly larvae in field settings.

Efficacy of a mixed amphetamine salts compound in adults with attention-deficit/hyperactivity disorder

BACKGROUND

We report on a controlled trial of a mixed amphetamine salts compound (Adderall, dextroamphetamine sulfate, dextro-, levoamphetamine sulfate, dextroamphetamine aspartate, levoamphetamine aspartate, and dextroamphetamine saccharate) in the treatment of adult attention-deficit/hyperactivity disorder (ADHD).

METHODS

This was a 7-week, randomized, double-blind, placebo-controlled, crossover study of Adderall in 27 well-characterized adults satisfying full DSM-IV criteria for ADHD of childhood onset and persistent symptoms into adulthood. Medication was titrated up to 30 mg twice a day. Outcome measures included the ADHD Rating Scale and the Clinical Global Impression Score. Comorbid psychiatric disorders were assessed to test for potential effects on treatment outcome.

RESULTS

Treatment with Adderall at an average oral dose of 54 mg (administered in 2 daily doses) was effective and well tolerated. Drug-specific improvement in ADHD symptoms was highly significant overall (42% decrease on the ADHD Rating Scale, P<.001), and sufficiently robust to be detectable in a parallel groups comparison restricted to the first 3 weeks of the protocol (P<.001). The percentage of subjects who improved (reduction in the ADHD rating scale of > or =30%) was significantly higher with Adderall treatment than with a placebo (70% vs 7%; P =.001).

CONCLUSIONS

Adderall was effective and well tolerated in the short-term treatment of adults with ADHD. More work is needed to evaluate the long-term effects of Adderall, or other amphetamine compounds, in the treatment of adults with ADHD.

Extended survival in advanced and refractory multiple myeloma after single-agent thalidomide: identification of prognostic factors in a phase 2 study of 169 patients

This report of a phase 2 trial of thalidomide (THAL) (200 mg/d; 200 mg increment every 2 weeks to 800 mg) for 169 patients with advanced myeloma (MM) (abnormal cytogenetics (CG), 67%; prior autotransplant, 76%) extends earlier results in 84 patients. A 25% myeloma protein reduction was obtained in 37% of patients (50% reduction in 30% of patients; near-complete or complete remission in 14%) and was more frequent with low plasma cell labeling index (PCLI) (below 0.5%) and normal CG. Two-year event-free and overall survival rates were 20% +/- 6% and 48% +/- 6%, respectively, and these were superior with normal CG, PCLI of less than 0.5%, and beta(2)-microglobulin of 3 mg/L. Response rates were higher and survival was longer especially in high-risk patients given more than 42 g THAL in 3 months (median cumulative dose) (landmark analysis); this supports a THAL dose-response effect in advanced MM.

Thalidomide in the management of multiple myeloma

Thalidomide has recently been shown to have significant activity in refractory multiple myeloma (MM). A follow-up of the original phase II trial, expanded to 169 patients, shows 2-year survival of 60%; patients receiving > or =42 g over 3 months had a higher response rate and superior survival than those receiving lower doses. The addition of thalidomide to dexamethasone and chemotherapy for the management of post-transplant relapses results in higher response rates. The early results of the Total Therapy II trial for newly diagnosed MM patients show an unprecedented complete remission (CR) and near-CR rate of 69% after two melphalan-based transplants (whether or not receiving thalidomide). In addition, available clinical trial information involving at least 20 patients confirms that thalidomide is active in one third of patients in single-agent trials for refractory disease, with response rates increasing to 50% to 60% in combination with dexamethasone and to as high as 80% in combination with dexamethasone and chemotherapy. When applied as primary therapy in smoldering myeloma, one third of patients experienced 50% paraprotein reduction (PPR); in combination with dexamethasone pulsing, 70% to 80% of symptomatic patients responded. Thus, thalidomide is a major new tool in the treatment armamentarium of MM. The virtual lack of myelosuppression makes it an ideal agent for combination with cytotoxic chemotherapy. Newer, more potent, and less toxic derivatives of thalidomide are being evaluated.

In vitro generation of Epstein-Barr virus-specific cytotoxic T cells in patients receiving haplo-identical allogeneic stem cell transplantation

Use of a partially mismatched related donor (PMRD) is an option for patients who require allogeneic transplantation but do not have a matched sibling or unrelated donor. Epstein-Barr virus (EBV)-induced lymphoma is a major cause of mortality after PMRD transplantation. In this study, we present a clinical grade culture system for donor-derived EBV-specific cytotoxic T cells (CTLs) that do not recognize haplo-identical recipient cells. The EBV-specific CTLs were tested for cytolytic specificity and other functional properties, including ability to transgress into tissues, propensity for apoptosis, degree of clonality, stability of dominant T-cell clones, and Tc and Th phenotypes. The EBV-specific CTLs were routinely expanded to greater than 80 x 10(6) over a period of 5 weeks, which is sufficient for clinical application. A CD8+ phenotype predominated, and the CTLs were highly specific for donor lymphoblastoid cell lines (LCLs) without killing of recipient targets or K562. Vbeta spectratyping showed an oligoclonal population that was stable on prolonged culture. The EBV-specific CTLs were activated (D-related human leukocyte antigen [HLA-DR+], L-selectin+/-) and of memory phenotype (CD45RO+). Expression of the integrin VLA-4 suggested that these CTLs could adhere to endothelium and migrate into tissues. The Bcl-2 message was upregulated, which may protect the CTLs from the apoptosis. The first demonstration of overexpression of bcl-2 in human memory CTLs. In addition, we show that lymphoblastoid cell lines used to generate CTLs are readily genetically modified with recombinant lentivirus, indicating that genetically engineered antigen presentation is feasible.

General case quasi-pyramidal staff training to promote generalization of teaching skills in supervisory and direct-care staff

The authors employed staff training strategies designed to enhance generalization of teaching skills in staff working with persons with developmental disabilities. Staff training consultants initially employed a general case training approach involving the use of specially selected client program exemplars to provide three supervisory staff with generalized teaching skills. Subsequently, supervisory staff used the general case approach to train teaching skills to direct-care staff, with staff training support from the consultants (quasi-pyramidal training). Supervisors showed improvement in teaching skills after supervisory staff training, but only one of the three supervisors exceeded 70% correct skill use. After participating in the training of their own staff, however, supervisors demonstrated further improvements in skill use. All direct-care staff showed improvement after quasi-pyramidal training, with seven of the nine staff exceeding 70% correct skill use. General case quasi-pyramidal training appears to have potential as a strategy for promoting generalization of staff teaching skills in both trainees and trainers.

Non-stimulant treatments for ADHD

We reviewed the literature of medication trials in ADHD to evaluate the scope of the available non-stimulant treatments. A variety of compounds with a common noradrenergic/ dopaminergic activity have shown documented anti-ADHD activity. There is a substantial body of literature documenting the efficacy of tricyclic antidepressants on ADHD in over 1,000 subjects. In addition, the atypical antidepressant bupropion and the novel noradrenergic specific antidepressant tomoxetine have also been documented to be effective in the treatment of ADHD in controlled clinical trials. Despite wide use, the scientific base supporting the efficacy of alpha-2, noradrenergic agonists continues to be limited. Several lines of evidence provide preliminary support for the potential benefits of cholinergic cognitive enhancing drugs in such as anticholinesterase inhibitors (tacrine, donepezil) as well as novel nicotinic analogues (ABT-418). Despite these promising results, more research is needed on alternative pharmacologic treatments for the treatment of ADHD.

Analysis of pain behavior profiles and functional disability in outpatient physical therapy clinics

STUDY DESIGN

Descriptive, ex post facto.

OBJECTIVES

To determine the proportion of physical therapy outpatients with pain who exhibit various pain behavior profiles, and to determine whether there are differences in functional disability across the profiles.

BACKGROUND

Physical therapists treat many patients who have chronic pain. Research suggests that early identification and multidisciplinary treatment are effective and economical for these patients. The Multidimensional Pain Inventory (MPI) and the Pain Disability Index (PDI) are potential screening tools that could be used in physical therapy clinics to determine which patients should be referred for multidisciplinary treatment.

METHODS AND MEASURES

MPI and PDI data were gathered on 57 physical therapy outpatients (mean age 44.3 +/- 14.5 years, 22 men and 35 women) with pain of 3 or more months duration. ANOVA was used to analyze differences in mean PDI scores across the MPI profiles.

RESULTS

Of all patients, 42.1% fit the Adaptive Coper profile, 29.8% fit the Interpersonally Distressed profile, and 28.1% fit the Dysfunctional profile. There were significant differences in PDI scores among profile groups. Post hoc analysis showed that the PDI scores of the Adaptive Coper and Interpersonally Distressed groups were different from the Dysfunctional group, but that there was no difference between the Adaptive Coper and Interpersonally Distressed groups.

CONCLUSIONS

Many patients in outpatient physical therapy settings exhibit behavioral, affective, and cognitive characteristics associated with chronic pain. Thirty-three patients (57.9%) had MPI profiles (interpersonally distressed and dysfunctional) that suggest they might benefit from multidisciplinary treatment.

The course of Tourette's disorder: a literature review

With the goal of evaluating the available literature on the course of Tourette's disorder, we conducted a systematic literature search through electronic databases for pertinent scientific articles in English with a minimum of 20 subjects. We also examined bibliographies of papers identified in this manner for additional sources. We found only 16 articles; most consisted of retrospective reports on treated samples. Overall, the available literature suggests that Tourette's disorder follows a remitting course in a sizeable number of individuals. Little has been published regarding predictors of remission or persistence. More work is needed using longitudinal prospective studies to better define the course and outcome of Tourette's disorder.

Pediatric mania: a developmental subtype of bipolar disorder?

Despite ongoing controversy, the view that pediatric mania is rare or nonexistent has been increasingly challenged not only by case reports, but also by systematic research. This research strongly suggests that pediatric mania may not be rare but that it may be difficult to diagnose. Since children with mania are likely to become adults with bipolar disorder, the recognition and characterization of childhood-onset mania may help identify a meaningful developmental subtype of bipolar disorder worthy of further investigation. The major difficulties that complicate the diagnosis of pediatric mania include: 1) its pattern of comorbidity may be unique by adult standards, especially its overlap with attention-deficit/hyperactivity disorder, aggression, and conduct disorder; 2) its overlap with substance use disorders; 3) its association with trauma and adversity; and 4) its response to treatment is atypical by adult standards.

Molecular cloning and functional analysis of three type D endogenous retroviruses of sheep reveal a different cell tropism from that of the highly related exogenous jaagsiekte sheep retrovirus

Integrated into the sheep genome are 15 to 20 copies of type D endogenous loci that are highly related to two exogenous oncogenic viruses, jaagsiekte sheep retrovirus (JSRV) and enzootic nasal tumor virus (ENTV). The exogenous viruses cause infectious neoplasms of the respiratory tract in small ruminants. In this study, we molecularly cloned three intact type D endogenous retroviruses of sheep (enJS56A1, enJS5F16, and enJS59A1; collectively called enJRSVs) and analyzed their genomic structures, their phylogenies with respect to their exogenous counterparts, their capacity to form viral particles, and the expression specificities of their long terminal repeats (LTRs). In addition, the pattern of expression of enJSRVs in vivo was studied by in situ hybridization. All of the three enJSRV proviruses had open reading frames for at least one of the structural genes. In particular, enJS56A1 had open reading frames for all structural genes, but it could not assemble viral particles when highly expressed in human 293T cells. We localized the defect for viral assembly in the first two-thirds of the gag gene by making a series of chimeras between enJS56A1 and the exogenous infectious molecular clone JSRV(21). Phylogenetic analysis distinguished five ovine type D retroviruses: enJSRV groups A and B, ENTV, and two exogenous JSRV groups (African versus United Kingdom/North America isolates). Transient transfection assays indicated that the LTRs of the three enJSRVs were not preferentially active in differentiated lung epithelial cells. This suggests that the pulmonary tropic JSRV developed from a type D retrovirus that did not have lung specificity. Consistent with this, in situ hybridization of a panel of normal ovine tissues revealed high expression of enJSRV mRNA in the luminal epithelium and glandular epithelium of the uterus; lower expression was localized in the lamina propria of the gut and in the bronchiolar epithelium of the lungs.

Informativeness of structured diagnostic interviews in the identification of Tourette's disorder in referred youth

Although specialized programs have greatly advanced the treatment of youth with Tourette's disorder (TD), not all children with TD reach such programs, raising questions as to whether TD is adequately identified outside specialized settings. There is thus a need for evidence that cases identified in the nonspecialty setting are "true cases." Because structured diagnostic interview methodology can reduce errors of omission, this approach can facilitate the identification of TD in referred youth outside specialized programs. Similarities between cases ascertained in specialty and nonspecialty settings would suggest that those identified in the nonspecialty setting were indeed "true cases." Comparisons were made between youth with TD ascertained through a specialized TD program who had both a structured diagnostic interview-derived diagnosis of TD plus an expert evaluation of TD (N = 103), with youth ascertained through a non-TD specialized pediatric psychopharmacology program who had a structured diagnostic interview-derived diagnosis of TD (N = 92). Irrespective of ascertainment source, children with structured interview-derived diagnosis of TD shared similar correlates in terms of tic severity, mean age of onset and duration of tics, as well as patterns of comorbidity well known to be associated with TD in clinical samples. Children meeting diagnostic criteria for TD on structured diagnostic interviews share similarities and patterns of clinical correlates, irrespective of ascertainment through a specialized TD or non-TD specialized clinic. These findings support the usefulness of structured diagnostic interview methodology as a diagnostic aid for the identification of TD in non-TD specialized settings and facilitate delineation of patterns of comorbidity.

Baseline susceptibility of the corn earworm (Lepidoptera: Noctuidae) to the Cry1Ab toxin from Bacillus thuringiensis

Susceptibility to Cry1Ab toxin from Bacillus thuringiensis (Bt) was determined for 12 field populations of neonate corn earworm, Helicoverpa zea (Boddie), from the United States. Earworm larvae were exposed to artificial diet treated with increasing Bt concentrations, and mortality and growth inhibition were evaluated after 7 d. The range of variation in Bt susceptibility indicated by growth inhibition was very similar to that indicated by mortality. Although interpopulation variation in susceptibility to both proteins was observed, the magnitude of the differences was small (less than or equal to fivefold). These results suggest that the observed susceptibility differences reflect natural variation in Bt susceptibility among corn earworm populations rather than variation caused by prior exposure to selection pressures. Therefore, corn earworms apparently are susceptible to Bt toxins across most of their geographic range.

Family study of girls with attention deficit hyperactivity disorder

OBJECTIVE

Because attention deficit hyperactivity disorder (ADHD) is relatively infrequent among girls, little is known about the causes of ADHD in girls. To help fill this gap in the literature, the authors assessed the familial transmission of ADHD in families ascertained through girls.

METHOD

Interviewers who were blind to diagnosis administered structured psychiatric interviews to 140 girls with ADHD and their 417 first-degree relatives and to 122 girls without ADHD and their 369 first-degree relatives.

RESULTS

The relatives of the ADHD girls had a significantly higher prevalence of ADHD, according to either the DSM-III-R or DSM-IV definition, than the relatives of the comparison girls. However, this did not differ from the prevalence the authors reported previously for families of boys with ADHD. Like the boys' families, the relatives of the girl probands also had significantly higher prevalences of antisocial, mood, anxiety, and substance use disorders, although the prevalence of familial antisocial disorders was lower than had been observed in the boys' families. There was no association between the DSM-IV subtypes of the probands and relatives.

CONCLUSIONS

The familial transmission of ADHD and comorbid disorders generalizes to families of girls with ADHD. Neither proband gender nor subtype influences the familial transmission of ADHD.

Attention-deficit/hyperactivity disorder in adults: an overview

To assess the validity of adult attention-deficit/hyperactivity disorder (ADHD), we reviewed clinical, family, psychopharmacologic, neurobiological, and outcome studies. We found multiple reports describing adults with clinical features highly reminiscent of the childhood ADHD. These adults, who are impulsive, inattentive, and restless, have the clinical "look and feel" of ADHD children. As with their childhood counterparts, many adults with ADHD suffer from antisocial, depressive, and anxiety disorders. They also show clinically significant impairments--histories of school failure, occupational problems, and traffic accidents. Studies of biological features show correspondences between child and adult cases of ADHD. Both show familial aggregation and a characteristic profile of neuropsychologic deficits; an emerging neuroimaging literature suggests that abnormalities in the same brain regions underlie both the child and adult forms of the disorder. Although these converging lines of evidence support the validity of ADHD in adults, follow-up studies of ADHD children have yielded ambiguous results. This ambiguity is in part due to differences in how researchers define the persistence of ADHD, a problem that suggests future research focus on how best to diagnose ADHD in adulthood.

Development of diagnostic concentrations for monitoring Bacillus thuringiensis resistance in European corn borer (Lepidoptera: Crambidae)

Two candidate diagnostic concentrations of the Cry1Ab and Cry1Ac toxins from Bacillus thuringiensis corresponding to the LC99 and EC99 (effective concentration that causes 99% growth inhibition) for European corn borer, Ostrinia nubilalis (Hübner), were determined based on previously obtained baseline data. Validation experiments using field-collected European corn borer populations from across North America showed that for Cry1Ab, a concentration corresponding to the upper limit of the 95% confidence interval of the LC99, produced mortality > 99% for all populations tested. However, for Cry1Ac, adjustments and further validation are probably necessary. Development of B. thuringiensis resistance monitoring programs that rely on diagnostic techniques are discussed.