Systematic Data Monitoring and Analysis of Cardiovascular Off-label Prescriptions in Pediatrics: Focus on Angiotensin-Converting Enzyme Inhibitors (ACE-I) and Beta Blockers

INTRODUCTION

Many efforts have been made to stimulate clinical trials (CTs) in pediatrics but most of the drugs are still authorized only in adults and used off-label in the pediatric population.

AIM

To assess how widespread is the off-label prescription in Italy and to identify areas of unmet medical need by applying a model for the systematic collection and analysis of data.

METHODS

A study was performed using 2015 data from the Italian Medicines Utilization Monitoring Centre Health Database (OsMed). A study sample of 3,726,583 pediatric patients, was considered. Cardiovascular drugs were selected for this study. Assessment of the off-label use, the analysis of the pharmacovigilance signals, a bibliographic research and the analysis of ongoing CTs were carried out.

RESULTS

In 2015, 8,544 pediatric patients received treatment with a cardiovascular drug. Angiotensin converting enzyme inhibitors (ACE-I) followed by beta blockers agents are the most prescribed molecules. Eight molecules were selected and an in-depth analysis conducted. The PhV network showed only one record of adverse reaction as off-label in 2015. The results show several therapeutic areas of use in pediatrics.

CONCLUSION

Off-label in pediatrics is largely widespread in Europe and US and our results show it is also present in Italy. Molecules selected are used off-label for therapeutic areas such as oncologic, hematological and rare diseases. Results of pharmacovigilance suggests underreporting. The analysis carried out in this study could be an open track for a systematic monitoring activity and of interest for prescribers, pediatricians and other healthcare professionals during the clinical practice.

Proteomic peptide scan of porphyromonas gingivalis fima type ii for searching potential b-cell epitopes

PURPOSE

To identify potential antigenic targets for Porphyromonas gingivalis vaccine development.

MATERIALS AND METHODS

In the present study, we analyzed the Porphyromonas gingivalis, fimA type II primary amino acid sequence and characterized the similarity to the human proteome at the pentapeptide level.

RESULTS

We found that exact peptide-peptide profiling of the fimbrial antigen versus the human proteome shows that only 19 out of 344 fimA type II pentapeptides are uniquely owned by the bacterial protein.

CONCLUSIONS

The concept that protein immunogenicity is allocated in rare peptide sequences and the search the Porphyromonas gingivalis fimA type II sequence for peptides unique to the bacterial protein and absent in the human host, might be used in new therapeutical approaches as a significant adjunct to current periodontal therapies.

Subcutaneous blood patch for iatrogenic suboccipital pseudomeningocele following decompressive suboccipital craniectomy and enlarging duroplasty for the treatment of Chiari I malformation. Technical note

PURPOSE

Epidural blood patch (EBP) represents one of the best nonsurgical treatment for intracranial hypotension syndrome. Orthostatic headache caused by reduced intracranial cerebrospinal fluid (CSF) pressure, like in "spontaneous" intracranial hypotension or as consequence of lumbar puncture or anesthesiological procedure, can be managed with the injection of autologous blood on the epidural space with a successful rate of 89%, increased to 97% after a second application.

MATERIALS AND METHODS

This 9-year-old girl was admitted to our department because of a suboccipital pseudomeningocele. She was previously operated on for a Chiari type I malformation by suboccipital craniectomy, C1 laminectomy and duraplasty. At the admission, she complained for nucal pain. Brain MRI showed a large suboccipital fluid collection that persisted even after the revision of the duraplasty and the placement of an external lumbar drainage. The child underwent a first injection of a mixture of blood (10 ml) and fibrin glue (10 ml) within the subcutaneous space after needle-aspiration of the collection. The same treatment was repeated 3 weeks later.

RESULTS

The procedures were well tolerated and no local or systemic complications occurred. The fluid collection was significantly reduced after the first injection and it was completely effaced following the second one. Such a result remained stable after 3 months, as demonstrated by MRI. No recurrence of the pseudomeningocele was detected at the last clinical control (8-month follow-up).

CONCLUSION

Subcutaneous blood patch could represent a safe and effective option for the treatment of CSF fistula, especially in case of failure of the traditional management.

Mapping the human proteome for non-redundant peptide islands

We describe immune-proteome structures using libraries of protein fragments that define a structural immunological alphabet. We propose and validate such an alphabet as i) composed of letters of five consecutive amino acids, pentapeptide units being sufficient minimal antigenic determinants in a protein, and ii) characterized by low-similarity to human proteins, so representing structures unknown to the host and potentially able to evoke an immune response. In this context, we have thoroughly sifted through the entire human proteome searching for non-redundant protein motifs. Here, for the first time, a complete sequence redundancy dissection of the human proteome has been conducted. The non-redundant peptide islands in the human proteome have been quantified and catalogued according to the amino acid length. The library of uniquely occurring n-peptide sequences that was obtained is characterized by a logarithmic decrease of the number of non-redundant peptides as a function of the peptide length. This library represents a highly specific catalogue of molecular protein signatures, the possible use of which in cancer/autoimmunity research is discussed, with a major focus on non-redundant dodecamer sequences.

Perinatal glucocorticoid treatment disrupts the hypothalamo-lactotroph axis in adult female, but not male, rats

This study aimed to test the hypothesis that the tuberoinfundibular dopaminergic neurons of the arcuate nucleus and/or the lactotroph cells of the anterior pituitary gland are key targets for the programming effects of perinatal glucocorticoids (GCs). Dexamethasone was administered noninvasively to fetal or neonatal rats via the mothers' drinking water (1 mug/ml) on embryonic d 16-19 or neonatal d 1-7, and control animals received normal drinking water. At 68 d of age, the numbers of tyrosine hydroxylase-positive (TH+) cells in the arcuate nucleus and morphometric parameters of pituitary lactotrophs were analyzed. In control animals, striking sex differences in TH+ cell numbers, lactotroph cell size, and pituitary prolactin content were observed. Both pre- and neonatal GC treatment regimens were without effect in adult male rats, but in females, the overriding effect was to abolish the sex differences by reducing arcuate TH+ cell numbers (pre- and neonatal treatments) and reducing lactotroph cell size and pituitary prolactin content (prenatal treatment only) without changing lactotroph cell numbers. Changes in circulating prolactin levels represented a net effect of hypothalamic and pituitary alterations that exhibited independent critical windows of susceptibility to perinatal GC treatments. The dopaminergic neurons of the hypothalamic periventricular nucleus and the pituitary somatotroph populations were not significantly affected by either treatment regimen in either sex. These data show that the adult female hypothalamo-lactotroph axis is profoundly affected by perinatal exposure to GCs, which disrupts the tonic inhibitory tuberoinfundibular dopaminergic pathway and changes lactotroph morphology and prolactin levels in the pituitary and circulation. These findings provide new evidence for a long-term disruption in prolactin-dependent homeostasis in females, but not males, after inappropriate GC exposure in perinatal life.

Early postnatal chronic inflammation produces long-term changes in pain behavior and N-methyl-D-aspartate receptor subtype gene expression in the central nervous system of adult mice

The objective of this study was to test whether postnatal chronic inflammation resulted in altered reactivity to pain later in life when reexposed to the same inflammatory agent and whether this alteration correlated with brain-region-specific patterns of N-methyl-D-aspartate (NMDA) receptor subtype gene expression. Neonatal mouse pups received a single injection of complete Freund's adjuvant (CFA) or saline into the left hind paw on postnatal day 1 or 14. At 12 weeks of age, both neonatal CFA- and saline-treated animals received a unilateral injection of CFA in the left hind paw. Adult behavioral responsiveness of the left paw to a radiant heat source was determined in mice treated neonatally with saline or CFA before and after receiving CFA as adults. Twenty-four hours later, brains were dissected and NMDA receptor subunit gene expression was determined in four different brain areas by using an RNase protection assay. The results indicated that NMDA receptor subtype gene expression in adult mice exposed to persistent neonatal peripheral inflammation was brain region specific and that NMDA gene expression and pain reactivity differed according to the day of neonatal CFA exposure. Similarly, adult behavioral responsiveness to a noxious radiant heat source differed according to the age of neonatal exposure to CFA. The data suggest a possible molecular basis for the hypothesis that chronic persistent inflammation experienced early during development may permanently alter the future behavior and the sensitivity to pain later in life, especially in response to subsequent or recurrent inflammatory events.

Regulation of the preprosomatostatin gene by cyclic-AMP in cerebrocortical neurons

The gene coding for preprosomatostatin (ppSom), the molecular precursor of somatostatin (Som), is regulated at the level of transcription by calcium ions and cyclic-AMP [F. Baldino, S. Fitzpatrick-McElligott, T. O'Kane, I. Gozes, Hormonal regulation of somatostatin, Synapse 2 (1988) 317-325; M.R. Montminy, M.J. Low, L. Tapia-Arancibia, Cyclic AMP regulates somatostatin mRNA accumulation in primary diencephalic cultures and in transfected fibroblast cells, J. Neurosci. 6 (1986) 1171-1176.], or by agents which increase intracellular levels of cAMP directly, such as forskolin [M.R. Montminy, M.J. Low, L. Tapia-Arancibia, Cyclic AMP regulates somatostatin mRNA accumulation in primary diencephalic cultures and in transfected fibroblast cells, J. Neurosci. 6 (1986) 1171-1176.]. Transcriptional induction of the ppSom gene as examined in PC12 cells, transfected fibroblasts and primary diencephalic cultures, requires the highly conserved cAMP response element (CRE), which confers gene responsiveness to cAMP [M. Comb, N. Mermod, S.E. Hyman, Proteins bound at adjacent DNA elements act synergistically to regulate human proenkephalin cAMP inducible transcription, EMBO J. 7 (1988) 3793-3805; T. Tsukada, J.S. Fink, G. Mandel, Identification of a region in the human vasoactive intestinal polypeptide gene responsible for regulation by cyclic AMP, J. Biol. Chem. 262 (1987) 8743-8747.]. The ppSom gene is subject to stringent regulation during cerebrocortical development in vivo; however, little information is available regarding ppSom gene regulation by neurotransmitters or second-messengers in cortical neurons. We used primary cerebrocortical cell cultures from fetal mice to examine the dose-response and time-course of ppSom gene expression in response to the cyclic-AMP analogs, dibutyrl-cAMP (dbcAMP), and 8-bromo-cAMP (8-BrcAMP). We report a dose-response for both analogs in the range of 0.1-10 mM. Dose-response studies using agents which directly stimulate intracellular cAMP synthesis (forskolin) or inhibit its breakdown (3-isobutyl 1-methyl xanthine) were also performed. We observed an apparent synergistic effect on ppSom expression when used in combination. An increase in ppSom mRNA levels was observed by 4 h, with a maximal response at 12-24 h. No change in ppSom mRNA levels was observed in response to phorbol myristate acetate (PMA). Our findings confirm the specificity of ppSom gene regulation by cAMP and Ca2+ ions, and demonstrate the utility of using primary cerebrocortical cultures for the study of somatostatin gene expression by neurotransmitters and second-messengers as a model of human neurologic disorders.

[Application to an automatic system of a direct method for determining atypical variants of cholinesterase using succinyldithiocholine as substrate]

The determination of human serum cholinesterase (EC 3.1.1.8) is frequently requested to detect patients with atypical forms of the enzyme which reacts abnormally with succinylcholine (suxamethonium), employed as a neuromuscular blocking agent. Usually, for biochemical identification of succinylcholine sensitive individuals the standard reaction is run with and without the inhibitors, notably dibucaine. A new test for direct determination of succinylcholine sensitive individuals which use a substrate analogue of succinylcholine was applied to a automated instrument. The linearity, precision, recovery, interference and correlation of the method have been evaluated. We have estimated the reference intervals for a population of 364 healthy subjects subdivided for sex, three atypical homozygotes and two atypical heterozygotes. On the basis of analytical performance we can conclude that this test may offer a further parameter for preoperative screening of individuals with an abnormal response to the muscle relaxant succinylcholine, thus avoiding the determination of genotype by measurement of dibucaine number.

[Study of several proteins of the acute phase of surgical intervention]

The aim of this study is to evaluate the behaviour of some proteins of acute phase (C reactive protein, alpha 1 acid glycoprotein, fibrinogen) in patients undergoing surgical operation. C reactive protein seems to be the most responsive to surgical trauma; alpha 1 acid glycoprotein reveals complications post-operation.

[The serum fructosamine test in the control plan of glucose homeostasis]

A new method to measure serum glycosylated proteins as index of diabetic control is evaluated. Precision, recovery and interference tests have been evaluated. A good correlation of fructosamine values with glycosylated haemoglobin and glucose in normal and diabetic patients was found. The analytical performance and its simple application to automated instruments make this test suitable for monitoring diabetes mellitus and for assessing intermediate-term control of blood glucose.

Frequency of intracoronary filling defects by angiography in angina pectoris at rest

Recent studies have shown that pain at rest in patients with unstable angina pectoris is often caused by transient reduction in regional myocardial perfusion. Coronary spasm has been implicated as a mechanism of this phenomenon. Recent reports have documented the occurrence of intracoronary thrombus in patients with unstable angina. Previous surveys have estimated a 6 to 12% frequency of intracoronary thrombus in this syndrome, but have not examined whether this incidence is related to how recent the angina at rest was. Angiograms of 119 patients with unstable angina who had rest pain within 14 days of angiography and 35 patients with stable angina were surveyed. Patients with unstable angina were subgrouped according to how recent angina at rest was at the time of angiography. Group I consisted of 44 patients in whom rest pain occurred within 24 hours before angiography. The 75 patients in group II had angina at rest between 1 and 14 days before angiography. Patients in group II had stable angina. The angiographic criterion for intracoronary thrombus was an intraluminal filling defect, surrounded by contrast medium on 3 sides, located just distal to or within a coronary stenosis, as assessed by each of 2 independent observers blinded to the nature of the anginal syndrome and its temporal proximity. Intracoronary thrombi were found in 44 of 119 patients with unstable angina (37%) and 0 of 35 patients with stable angina (p less than 0.00002). Intracoronary thrombi were found in 23 of 44 patients (52%) in group I and 21 of 75 (28%) in group II (p less than 0.008).(ABSTRACT TRUNCATED AT 250 WORDS)

Discrimination between spermine and calcium binding activities in crude extracts from chick duodenal mucosa

Chick duodenum contains proteins capable to bind radioactive spermine and calcium. From competition studies the spermine binding protein(s) seem(s) to differ from calcium binding protein. This finding makes possible to distinguish and assay separately those two cation binding activities.