CP-154,526: a potent and selective nonpeptide antagonist of corticotropin releasing factor receptors

Here we describe the properties of CP-154,526, a potent and selective nonpeptide antagonist of corticotropin (ACTH) releasing factor (CRF) receptors. CP-154,526 binds with high affinity to CRF receptors (Ki < 10 nM) and blocks CRF-stimulated adenylate cyclase activity in membranes prepared from rat cortex and pituitary. Systemically administered CP-154,526 antagonizes the stimulatory effects of exogenous CRF on plasma ACTH, locus coeruleus neuronal firing and startle response amplitude. Potential anxiolytic activity of CP-154,526 was revealed in a fearpotentiated startle paradigm. These data are presented in the context of clinical findings, which suggest that CRF is hypersecreted in certain pathological states. We propose that a CRF antagonist such as CP-154,526 could affirm the role of CRF in certain psychiatric diseases and may be of significant value in the treatment of these disorders.

Structure-activity relationships of potent, selective inhibitors of neuronal nitric oxide synthase based on the 6-phenyl-2-aminopyridine structure

The synthesis and structure-activity relationships of a series of 6-phenyl-2-aminopyridines that potently and selectively inhibit the neuronal isoform of nitric oxide synthase (nNOS) are described. Compound 14bi from this series exhibits potent in vivo activity in harmaline-induced cGMP formation in rat cerebellum, a functional model of nNOS inhibition, and in the PCP-induced hypermotility model in the rat. These results suggest that 14bi may be a useful reagent for evaluating potential therapeutic applications of nNOS inhibitors in the central nervous system.

Conferring liver selectivity to a thyromimetic using a novel nanoparticle increases therapeutic efficacy in a diet-induced obesity animal model

Optimization of metabolic regulation is a promising solution for many pathologies, including obesity, dyslipidemia, type 2 diabetes, and inflammatory liver disease. Synthetic thyroid hormone mimics-based regulation of metabolic balance in the liver showed promise but was hampered by the low biocompatibility and harmful effects on the extrahepatic axis. In this work, we show that specifically directing the thyromimetic to the liver utilizing a nanogel-based carrier substantially increased therapeutic efficacy in a diet-induced obesity mouse model, evidenced by the near-complete reversal of body weight gain, liver weight and inflammation, and cholesterol levels with no alteration in the thyroxine (T4) / thyroid stimulating hormone (TSH) axis. Mechanistically, the drug acts by binding to thyroid hormone receptor β (TRβ), a ligand-inducible transcription factor that interacts with thyroid hormone response elements and modulates target gene expression. The reverse cholesterol transport (RCT) pathway is specifically implicated in the observed therapeutic effect. Overall, the study demonstrates a unique approach to restoring metabolic regulation impacting obesity and related metabolic dysfunctions.

A transition clinic model for inflammatory bowel disease between two tertiary care centers: outcomes and predictive factors

OBJECTIVE

Few models of transition have been proposed for inflammatory bowel disease (IBD). The aim of the present study is to evaluate the feasibility of a transition model and the predictive factors for success/failure.

PATIENTS AND METHODS

Patients with low activity or remission IBD were enrolled. Proposed model: three meetings every four-six weeks: the first one in the pediatric center (Bambino Gesù Children's Hospital); the second one, in the adult center (Foundation Polyclinic University A. Gemelli), with pediatric gastroenterologists; the last one, in the adult center, with adult gastroenterologists only. Questionnaires included anxiety and depression clinical scale, self-efficacy, quality of life, visual-analogic scale (VAS). Transition was considered successful if the three steps were completed.

RESULTS

Twenty patients were enrolled (range 18-25 years; M/F: 12/8; Ulcerative Colitis/Crohn's Disease 10/10); eight accepted the transition program, four delayed the process and eight refused. Patients who completed transition generated higher scores on the resilience scale, better scores on well-being perception, and had lower anxiety scores. Patients who failed transition were mostly women. The perceived utility of the transition program was scored 7.3 on a VAS scale.

CONCLUSIONS

The proposed transition program seems to be feasible. Psychological scores may help in selecting patients and predicting outcomes.

Abstract P1-07-02: Withdrawn

This abstract was withdrawn by the authors.

Citation Format: Di Nicola M, Volpari T, Fucà G, Romero Cordoba S, De Santis F, Rondinone O, Faraci S, Ferris F, Puricelli C, Castagnoli L, Marullo R, Cerchietti L, Pupa S. Withdrawn [abstract]. In: Proceedings of the 2018 San Antonio Breast Cancer Symposium; 2018 Dec 4-8; San Antonio, TX. Philadelphia (PA): AACR; Cancer Res 2019;79(4 Suppl):Abstract nr P1-07-02.

Pharmacokinetic effects of endoscopic gastric decontamination for multidrug gastric pharmacobezoars

Introduction

Intentional multiple drugs overdose is an often-encountered method of self-harm in adolescence. Treatments include supportive therapy, antidotes (when available) and decontamination techniques with the aim of reducing drugs absorption by the gastrointestinal system to minimize toxicity. Nevertheless, the decontamination techniques currently used, such as gastric lavage (GL), activated charcoal or whole-bowel irrigation, have a questionable effectiveness. Endoscopic gastric decontamination (EGD) treatment for massive ingestion of drugs or formation of pharmacobezoars is currently described only in anecdotal cases. Here we describe the management of an intentional drug overdose in an adolescent patient treated with EGD and the effects of this therapy on drugs pharmacokinetics.

Case report

A 15-year-old boy was admitted in an unconscious state (Glasgow Coma Scale: 7-8) to the pediatric intensive care unit after assuming an unspecified amount of quetiapine, aspirin, bisoprolol, fluoxetine, furosemide, alprazolam, and pregabalin pills. Rapid sequence intubation was immediately performed and then the patient was treated with symptomatic therapy and GL with minimal removal of gastric material. Accounting for the type of drugs, the time elapsed from oral assumption and the unknown quantity assumed, EGD was attempted with aim of removing potential aggregate of the drugs. Serial blood samples were taken before and after EGD to measure the plasma level of the drugs. A pharmacobezoar was found and was immediately removed with EGD. The results of the drug monitoring showed that quetiapine exceeded the toxic level reported in literature indicating that it may have been the drug assumed in higher quantity by our patient. PICU stay was uneventful, and the patient was transferred to the psychiatric ward after extubation.

Discussion

Our case shows how GL is not effective in mitigating multidrug absorption especially drugs potentially inducing pharmacobezoars. Furthermore, based on our plasma drug monitoring, we believe that early EGD should be considered in all cases of massive pill intake, prolonged release drugs that can form pharmacobezoars or in cases where a life-threatening dose cannot be excluded.