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Zimlovisertib (PF‐06650833) is a selective, reversible inhibitor of interleukin‐1 receptor‐associated kinase 4 (IRAK4) with anti‐inflammatory effects. This phase 1, open‐label, fixed‐sequence, two‐period, single‐dose study aimed to evaluate the mass balance and excretion rate of zimlovisertib in healthy male participants using a 14C‐microtracer approach. All six participants received 300 mg 14C‐zimlovisertib with lower radioactivity per mass unit orally in Period A, then unlabeled zimlovisertib 300 mg orally and 14C‐zimlovisertib 135 μg intravenously (IV) in Period B. Study objectives included extent and rate of excretion of 14C‐zimlovisertib, pharmacokinetics, and safety and tolerability of oral and IV zimlovisertib. Total radioactivity recovered in urine and feces was 82.4% ± 6.8% (urine 23.1% ± 12.3%, feces 59.3% ± 9.7%) in Period A. Zimlovisertib was absorbed rapidly following oral administration, with the fraction absorbed estimated to be 44%. Absolute oral bioavailability of the 300‐mg dose was 17.4% (90% confidence interval 14.1%, 21.5%) using the dose‐normalized area under the concentration–time curve from time 0 to infinity. There were no deaths, serious adverse events (AEs), severe AEs, discontinuations or dose reductions due to AEs, and no clinically significant laboratory abnormalities. These results demonstrate that zimlovisertib had low absolute oral bioavailability and low absorption (<50%). [ABSTRACT FROM AUTHOR]

OBJECTIVE. To assess whether improvements in cognitive and behavioral development seen in preschool educational programs persist, we compared those in a multisite randomized trial of such a program over the first 3 years of life (INT) to those with follow-up only (FUO) at 18 months of age. METHODS. This was a prospective follow-up of the Infant Health and Development Program at 8 sites heterogeneous for sociodemographic characteristics. Originally 985 children were randomized to the INT (n = 377) or FUO (n = 608) groups within 2 birth weight strata: heavier low birth weight (HLBW; 2001-2499 g) and lighter low birth weight (LLBW; [less than or equal to] 2000 g). Primary outcome measures were the Peabody Picture Vocabulary Test (PPVT-III), reading and mathematics subscales of the Woodcock-Johnson Tests of Achievement, youth self-report on the Total Behavior Problem Index, and high-risk behaviors on the Youth Risk Behavior Surveillance System (YRBSS). Secondary outcomes included Weschler full-scale IQ, caregiver report on the Total Behavior Problem Index, and caregiver and youth self-reported physical health using the Medical Outcome Study measure. Assessors were masked as to study status. RESULTS. We assessed 636 youths at 18 years (64.6% of the 985, 72% of whom had not died or refused at prior assessments). After adjusting for cohort attrition, differences favoring the INT group were seen on the Woodcock-Johnson Tests of Achievement in math (5.1 points), YRBSS (-0.7 points), and the PPVT-III (3.8 points) in the HLBW youth. In the LLBW youth, the Woodcock-Johnson Tests of Achievement in reading was higher in the FUO than INT group (4.2). CONCLUSIONS. The findings in the HLBW INT group provide support for preschool education to make long-term changes in a diverse group of children who are at developmental risk. The lack of observable benefit in the LLBW group raises questions about the biological and educational factors that foster or inhibit sustained effects of early educational intervention. Key Words early intervention, long-term results, low birth weight, randomized controlled trial Abbreviations IHDP--Infant Health and Development Program LLBW--lighter low birth weight HLBW--heavier low birth weight INT--intervention FUO--follow-up only YRBSS--Youth Risk Behavior Surveillance System BPI--Behavior Problem Index WASI--Weschler Abbreviated Scale of Intelligence PPVT-III--Peabody Picture Vocabulary Test-Version III HSG--high school graduate CI--confidence interval LSW--low birth weight, INTENSIVE EARLY EDUCATIONAL interventions have been documented to improve the cognitive outcomes (1) and, in some cases, reduce antisocial behavior early in the school experience. (2) In several single-site, randomized [...]

Objective. Some children in the United States continue to be exposed to levels of lead that increase their risk for lowered intellectual functioning and behavior problems. It is unclear whether chelation therapy can prevent or reverse the neurodevelopmental sequelae of lead toxicity. The objective of this study was to determine whether chelation therapy with succimer (dimercaptosuccinic acid) in children with referral blood lead levels between 20 and 44 [micro]g/dL (0.96-2.12 [micro]mol/L) at 12 to 33 months of age has neurodevelopmental benefits at age 7 years. Methods. The Treatment of Lead-Exposed Children (TLC) study is a randomized, double-blind, placebo-controlled trial that was conducted between September 1994 and June 2003 in Philadelphia, PA; Newark, NJ; Cincinnati, OH; and Baltimore, MD. Of 1854 referred children who were between the ages of 12 to 33 months and screened for eligibility, 780 were randomized to the active drug and placebo groups stratified by clinical center, body surface area, blood lead level, and language spoken at home. At 7 years of age, 647 subjects remained in the study. Participants were randomly assigned to receive oral succimer or placebo. Up to 3 26-day courses of succimer or placebo therapy were administered depending on response to treatment in those who were given active drug. Eighty-nine percent had finished treatment by 6 months, with all children finishing by 13 months after randomization. All participants received residential lead hazard control measures before treatment. TLC subjects also received a daily multivitamin supplement before and after treatment(s) with succimer or placebo. Scores on standardized neuropsychological measures that tap cognition, behavior, learning and memory, attention, and neuromotor skills were measured. Results. Chelation therapy with succimer lowered average blood lead levels for ~6 months but resulted in no benefit in cognitive, behavioral, and neuromotor endpoints. Conclusion. These new follow-up data confirm our previous finding that the TLC regimen of chelation therapy is not associated with neurodevelopmental benefits in children with blood lead levels between 20 and 44 [micro]g/dL (0.96-2.17 [micro]mol/L). These results emphasize the importance of taking environmental measures to prevent exposure to lead. Chelation therapy with succimer cannot be recommended for children with blood lead levels between 20 and 44 [micro]g/dL (0.96-2.12 [micro]mol/L). Pediatrics 2004;114:19-26; child, lead, environmental exposure, chelation therapy, succimer, cognition, clinical trials. ABBREVIATIONS. CDC, Centers for Disease Control and Prevention; TLC, Treatment of Lead-Exposed Children; NEPSY, Developmental Neuropsychological Assessment; CI, confidence interval., Before the availability of chelating drugs, as many as 45% of lead-poisoned children who presented with signs or symptoms of encephalopathy died, and more than one quarter of surviving patients [...]

Chelation therapy with succimer did not protect children with mild lead poisoning from developmental disabilities, according to a study of 780 children with blood lead levels between 20 and 44 micrograms per deciliter. Chelation therapy uses chemicals that can remove toxic metals from the body.

This double‐blind, randomized, placebo‐controlled, dose‐ascending, first‐in‐human study (NCT02766621) assessed the safety, tolerability, and pharmacokinetics (PK) of PF‐06823859, an anti–interferon β monoclonal antibody. Healthy subjects were randomized to single ascending doses (SADs) of intravenous PF‐06823859 30, 100, 300, 900, or 2000 mg or placebo; to multiple ascending doses (MADs) of subcutaneous PF‐06823859 100 or 300 mg or placebo (once every 2 weeks for a total of 3 doses); or to MAD of intravenous PF‐06823859 600 mg or placebo (once every 3 weeks or once every 4 weeks for a total of 2 doses). The incidence, severity, and causal relationship of adverse events (AEs) were assessed, along with immunogenicity and PK. In total, 62 subjects were randomized to treatment (SAD, n = 35; MAD, n = 27). There were 76 treatment‐emergent all‐causality AEs in the SAD (PF‐06823859: n = 25; placebo: n = 4) and MAD (PF‐06823859: n = 40; placebo: n = 7) cohorts. In the SAD cohorts, all treatment‐emergent all‐causality AEs were mild in severity; 4 AEs of moderate severity were identified in the MAD cohorts. No dose‐limiting AEs, serious AEs, treatment‐related discontinuations, dose reductions, or deaths occurred. PF‐06823859 exposure increased dose‐proportionally, with half‐life values ranging between 23 and 35 days. The estimated subcutaneous bioavailability was 43% to 44%. Immunogenicity incidence rates were low (antidrug antibodies, 12.5%; neutralizing antibodies, 2.1%). No immunogenically related clinical responses of concern were observed. In conclusion, PF‐06823859 demonstrated an acceptable safety, tolerability, and PK profile that supports clinical development for treating disorders associated with increased interferon β levels, such as dermatomyositis or systemic lupus erythematosus. [ABSTRACT FROM AUTHOR]

Abstract: There were over 600 antibodies submitted to HLDA8, with many of unknown specificity. Of these, 101 antibodies were selected for a blind panel study that also included 5 negative controls and 27 positive controls of known CD specificity making a total of 133 antibodies in the final panel. Of the 101 unknowns, 31 antibodies were identified during the course of this blind panel study as being specific for known molecules and included some specific for MHC class II antigens, CD45 isoforms and the Dombrock antigen. Several antibody pairs among those in the blind panel were found to have very similar staining patterns and were therefore compared by immunohistochemical and/or Western blot analyses for identity. [Copyright &y& Elsevier]

A pilot examination of interscorer reliability was conducted to assess consistent practice among examiners administering and scoring the Bayley Scales of Infant Development-Second Edition (BSID-II). This study reports the percentage of agreement obtained by 10 highly trained examiners scoring videotaped administrations of 29 children aged 12 to 39 months who completed the BSID-II Mental Scale. Mental Developmental Index (MDI) scores were initially analyzed for overall agreement followed by item analysis to identify specific discrepancies. Sixty items (107 to 166), each administered to seven or more children, were included in the analysis. Agreement was generally high (90% or above consensus); however, 23% of the items were below 90%. Although replication with a larger sample size is necessary, our clinical experience suggests that the variability for those items is not due to chance and can be reduced. Recommendations to reduce potential variability for those items are provided. This information has implications for practitioners and researchers and for training new examiners. [ABSTRACT FROM PUBLISHER]

Growth deficits associated with lead exposure might be ameliorated by chelation. We examined the effect of succimer on growth in 780 children 12-33 months old who had blood lead levels of 20-44 microg/dL and were randomized to receive up to three 26-day courses of succimer or placebo in a multicenter, double-blind trial. The difference in changes in weight and height between succimer and placebo groups at 1-34 months was calculated by fitting cubic splines. The difference in height change in children on succimer compared with placebo was -0.27 cm [95% confidence interval (95% CI), -0.42 to -0.11] from baseline to 9 months, when 99% of children had completed treatment, and -0.43 cm (95% CI, -0.77 to -0.09) during 34 months of follow-up. Similar differences in weight gain were not statistically significant. Although succimer lowers blood lead in moderately lead-poisoned children, it does not have a beneficial effect on growth and may have an adverse effect., Other Research Unit

Zimlovisertib (PF-06650833) is a selective, reversible inhibitor of interleukin-1 receptor-associated kinase 4 (IRAK4) with anti-inflammatory effects. This phase 1, open-label, fixed-sequence, two-period, single-dose study aimed to evaluate the mass balance and excretion rate of zimlovisertib in healthy male participants using a 14 C-microtracer approach. All six participants received 300 mg 14 C-zimlovisertib with lower radioactivity per mass unit orally in Period A, then unlabeled zimlovisertib 300 mg orally and 14 C-zimlovisertib 135 μg intravenously (IV) in Period B. Study objectives included extent and rate of excretion of 14 C-zimlovisertib, pharmacokinetics, and safety and tolerability of oral and IV zimlovisertib. Total radioactivity recovered in urine and feces was 82.4% ± 6.8% (urine 23.1% ± 12.3%, feces 59.3% ± 9.7%) in Period A. Zimlovisertib was absorbed rapidly following oral administration, with the fraction absorbed estimated to be 44%. Absolute oral bioavailability of the 300-mg dose was 17.4% (90% confidence interval 14.1%, 21.5%) using the dose-normalized area under the concentration-time curve from time 0 to infinity. There were no deaths, serious adverse events (AEs), severe AEs, discontinuations or dose reductions due to AEs, and no clinically significant laboratory abnormalities. These results demonstrate that zimlovisertib had low absolute oral bioavailability and low absorption (<50%)., (© 2022 The Authors. Clinical Pharmacology in Drug Development published by Wiley Periodicals LLC on behalf of American College of Clinical Pharmacology.)