Literature Watch

[A progress of macrolides therapy for chronic rhinosinusitis].

Cystic Fibrosis - Fri, 2018-05-18 07:37
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[A progress of macrolides therapy for chronic rhinosinusitis].

Lin Chung Er Bi Yan Hou Tou Jing Wai Ke Za Zhi. 2018 May;32(9):717-722

Authors: Shen S, Wang CS

Abstract
Macrolides are a type of antibiotics with macrocyclic lactone ring, which have been commonly used in the treatment of diffuse panbronchiolitis, chronic obstructive pulmonary disease, bronchial asthma, cystic fibrosis and other diseases. Macrolides not only have effect on antibacterial, but also effect on anti-inflammatory and immunoregulation. Chronic rhinosinusitis (CRS) is a common disease entity of infectious and inflammatory diseases that involved in nasal cavity and nasal sinuses, with various clinical phenotypes. With the high prevalence of CRS, it seriously affects the quality of patients' life. In recent years, a large number of studies have shown that long-term low-dose macrolides are effective in parts of patients with CRS. Although the mechanism of macrolides for CRS has not yet been clarified. According to recent studies, it might be related with anti-inflammatory or immunoregulation of macrolides and the different phenotypes of CRS. The safety and mechanism of long-term macrolides are needed further clarification.

PMID: 29771095 [PubMed]

Categories: Literature Watch

Impact of Intranasal Fentanyl in Nurse Initiated Protocols for Sickle Cell Vaso-occlusive Pain Episodes in a Pediatric Emergency Department.

Cystic Fibrosis - Fri, 2018-05-18 07:37
Related Articles

Impact of Intranasal Fentanyl in Nurse Initiated Protocols for Sickle Cell Vaso-occlusive Pain Episodes in a Pediatric Emergency Department.

Am J Hematol. 2018 May 17;:

Authors: Akinsola B, Hagbom R, Zmitrovich A, Kavanagh PL, Ashkouti A, Simon HK, Fleming A, Jain S, Dampier C, Morris CR

PMID: 29770479 [PubMed - as supplied by publisher]

Categories: Literature Watch

Case Report: Haemolytic anaemia with ceftazidime use in a patient with cystic fibrosis.

Cystic Fibrosis - Fri, 2018-05-18 07:37
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Case Report: Haemolytic anaemia with ceftazidime use in a patient with cystic fibrosis.

F1000Res. 2018;7:475

Authors: Yong J, Frost F, Nazareth D, Walshaw M

Abstract
Drug-induced Immune Haemolytic Anaemia (DIIHA) is a rare but serious complication of cephalosporin use. Ceftazidime is recognized to be a rare cause of DIIHA. We report and discuss a case of DIIHA in a person with cystic fibrosis who developed severe haemolytic anaemia following use of ceftazidime in the management of an acute pseudomonal pulmonary exacerbation.

PMID: 29770214 [PubMed]

Categories: Literature Watch

Microbial Interactions in the Cystic Fibrosis Airway.

Cystic Fibrosis - Fri, 2018-05-18 07:37
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Microbial Interactions in the Cystic Fibrosis Airway.

J Clin Microbiol. 2018 May 16;:

Authors: Granchelli AM, Adler FR, Keogh RH, Kartsonaki C, Cox DR, Liou TG

Abstract
Interactions in the airway ecology of cystic fibrosis may alter organism persistence and clinical outcomes. Better understanding of such interactions could guide clinical decisions. We fitted logistic regression models using generalized estimating equations to longitudinal two-year patient cohorts in the Cystic Fibrosis Foundation Patient Registry, 2003-2011 to study associations between airway organisms present in each calendar year and their presence in the subsequent year. Models were adjusted for clinical characteristics and multiple observations per patient and tested for sensitivity to cystic fibrosis-specific treatments. The study included 28,042 patients aged six and older from 257 accredited US Care Centers and Affiliates with sputum cultures for at least two consecutive years for methicillin-sensitive Staphylococcus aureus, methicillin-resistant S aureus, Pseudomonas aeruginosa, Burkholderia cepacia complex, Stenotrophomonas maltophilia, Achromobacter xylosoxidans, and Candida and Aspergillus species. We analyzed 99.8% of 538,458 sputum cultures from the patients during the study period. Methicillin-sensitive S aureus was negatively associated with subsequent P aeruginosa. P aeruginosa was negatively associated with subsequent B cepacia complex, A xylosoxidans, and S maltophilia. B cepacia complex was negatively associated with future presence of all studied bacteria and Aspergillus species. P aeruginosa, B cepacia complex and S maltophilia were each reciprocally and positively associated with Aspergillus species. Independent of patient characteristics, studied organisms interact and alter outcomes of treatment decisions, sometimes in unexpected ways. By inhibiting P aeruginosa, methicillin-sensitive S aureus may delay lung disease progression. P aeruginosa and B cepacia complex may inhibit other organisms by decreasing airway biodiversity, potentially worsening lung disease.

PMID: 29769279 [PubMed - as supplied by publisher]

Categories: Literature Watch

Intraoperative intraluminal injection of N-acetylcysteine allowing treatment of distal intestinal obstruction syndrome without the need for enterotomy.

Cystic Fibrosis - Fri, 2018-05-18 07:37
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Intraoperative intraluminal injection of N-acetylcysteine allowing treatment of distal intestinal obstruction syndrome without the need for enterotomy.

BMJ Case Rep. 2018 May 16;2018:

Authors: Chilvers NJ, Wheeler J

Abstract
We describe a case of an 18-year-old man who suffers from cystic fibrosis and developed distal intestinal obstruction syndrome while being treated as an inpatient. Following failed medical management, we proceeded to laparotomy where the small bowel was decompressed with retrograde milking into the stomach, leaving a section of impacted stool in the distal ileum. N-acetylcysteine was injected into the bowel lumen proximal to the obstruction. This resulted in dissolution of the stool without the need for enterotomy and is, to our knowledge, the first successful example of this technique in the literature.

PMID: 29769187 [PubMed - in process]

Categories: Literature Watch

Case report on pathogenetic link between gluten and IgA nephropathy.

Cystic Fibrosis - Fri, 2018-05-18 07:37
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Case report on pathogenetic link between gluten and IgA nephropathy.

BMC Gastroenterol. 2018 May 16;18(1):64

Authors: Costa S, Currò G, Pellegrino S, Lucanto MC, Tuccari G, Ieni A, Visalli G, Magazzù G, Santoro D

Abstract
BACKGROUND: A relationship between IgA nephropathy (IgAN) and celiac disease (CD) has been reported. We show the pathogenetic link for the first time.
CASE PRESENTATION: A 39-year-old man with cystic fibrosis (CF) and CF-related diabetes started to present gross hematuria, back pain and headache. At admission, laboratory analysis showed increase in serum creatinine of 1.5 mg/dl, together with hematuria and mild proteinuria (1 g/24 h). He underwent a renal biopsy to investigate the cause of hematuria and renal failure. Biopsy was consistent with IgAN. In view of patient reported dyspepsia, an upper gastrointestinal endoscopy with duodenal biopsies was undertaken and was normal. We looked for mucosal deposits of tTG-2 in the duodenum and the renal mesangium. tTG-2 deposits were found both in the duodenum and in renal biopsies, where they topographically replicated mesangial IgA deposits. After one year on a continued gluten containing diet, the patient developed a Marsh 2 type duodenal pathology.
CONCLUSIONS: Our findings suggest a connection between CD and IgAN in terms of an immune-mediated gluten-induced pathogenesis even in the absence of villous atrophy and serum celiac autoantibodies.

PMID: 29769033 [PubMed - in process]

Categories: Literature Watch

Visual impairment and progressive phthisis bulbi caused by recessive pathogenic variant in MARK3.

Deep learning - Fri, 2018-05-18 07:37
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Visual impairment and progressive phthisis bulbi caused by recessive pathogenic variant in MARK3.

Hum Mol Genet. 2018 May 16;:

Authors: Ansar M, Chung H, Waryah YM, Makrythanasis P, Falconnet E, Rao AR, Guipponi M, Narsani AK, Fingerhut R, Santoni FA, Ranza E, Waryah AM, Bellen HJ, Antonarakis SE

Abstract
Developmental eye defects often severely reduce vision. Despite extensive efforts, for a substantial fraction of these cases the molecular causes are unknown. Recessive eye disorders are frequent in consanguineous populations and such large families with multiple affected individuals provide an opportunity to identify recessive causative genes. We studied a Pakistani consanguineous family with three affected individuals with congenital vision loss and progressive eye degeneration. The family was analyzed by exome sequencing of one affected individual and genotyping of all family members. We have identified a non-synonymous homozygous variant (NM_001128918.2:c.1708C>G:p.Arg570Gly) in the MARK3 gene as the likely cause of the phenotype. Given that MARK3 is highly conserved in flies (I: 55%; S: 67%) we knocked down the MARK3 homologue, par-1, in the eye during development. This leads to a significant reduction in eye size, a severe loss of photoreceptors and loss of vision based on electroretinogram (ERG) recordings. Expression of the par-1 p.Arg792Gly mutation (equivalent to the MARK3 variant found in patients) in developing fly eyes also induces loss of eye tissue and reduces the ERG signals. The data in flies and human indicate that the MARK3 variant corresponds to a loss of function. We conclude that the identified mutation in MARK3 establishes a new gene-disease link, since it likely causes structural abnormalities during eye development and visual impairment in humans, and that the function of MARK3/par-1 is evolutionarily conserved in eye development.

PMID: 29771303 [PubMed - as supplied by publisher]

Categories: Literature Watch

Genome-wide sequencing technologies: A primer for paediatricians.

Deep learning - Fri, 2018-05-18 07:37
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Genome-wide sequencing technologies: A primer for paediatricians.

Paediatr Child Health. 2018 May;23(3):191-197

Authors: Hayeems RZ, Boycott KM

Abstract
Genetic testing has been a routine part of paediatic medicine for decades. Over time, the number of genetic tests available for children presenting with features thought to be explained by an underlying genetic aetiology has expanded considerably. Genome-wide sequencing approaches (e.g., whole-exome sequencing, whole-genome sequencing) are now emerging as the most comprehensive approaches to genetic diagnosis that we have seen to date; multiple serial tests that were once required for a child under diagnostic investigation can now be accomplished in a single assay. Moreover, the performance of this single assay appears to be superior to the sum of its parts. Despite this promise, technical, ethical and access-related complexities require considerable attention prior to the implementation of these tools in mainstream paediatrics. To ready paediatricians for the eventual transition to genome-based diagnostics, herein we review both the elements and delivery considerations of this emerging technology.

PMID: 29769805 [PubMed]

Categories: Literature Watch

Novel variants identified with next-generation sequencing in Polish patients with cone-rod dystrophy.

Deep learning - Fri, 2018-05-18 07:37
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Novel variants identified with next-generation sequencing in Polish patients with cone-rod dystrophy.

Mol Vis. 2018;24:326-339

Authors: Wawrocka A, Skorczyk-Werner A, Wicher K, Niedziela Z, Ploski R, Rydzanicz M, Sykulski M, Kociecki J, Weisschuh N, Kohl S, Biskup S, Wissinger B, Krawczynski MR

Abstract
Purpose: The aim of this study was to identify the molecular genetic basis of cone-rod dystrophy in 18 unrelated families of Polish origin. Cone-rod dystrophy is one of the inherited retinal dystrophies, which constitute a highly heterogeneous group of disorders characterized by progressive dysfunction of photoreceptors and retinal pigment epithelium (RPE) cells.
Methods: The study group was composed of four groups of patients representing different Mendelian inheritance of the disease: autosomal dominant (AD), autosomal recessive (AR), X-linked recessive (XL), and autosomal recessive or X-linked recessive (AR/XL). The combined molecular strategy included Sanger sequencing of the RPGR-ORF15 gene (three families with XL and three families with the AR/XL mode of inheritance), mutation-specific microarray analysis of the ABCA4 gene (five families with the AR mode of inheritance and two families with the AR/XL mode of inheritance), targeted next-generation sequencing (NGS) of inherited retinal disease-associated (IRD) genes (seven families with the AD mode of inheritance and five families with the AR mode of inheritance), and whole exome sequencing, performed in select families who had been mutation-negative in the analysis with the targeted NGS panel (one family with the AD mode of inheritance, one family with the AR mode of inheritance, and two families with the AR/XL mode of inheritance).
Results: Based on this combined strategy, we managed to identify potentially causative variants in seven out of 18 families with CRD. Five of these variants are novel: c.3142_3143dupAA, p.(Glu1049Argfs*41) in the RPGR-ORF15 gene, two variants: c.1612delT, p.(Trp538Glyfs*15) and c.2389dupG, p.(Ile798Hisfs*20) in the PROM1 gene in one family, c.592A>C, p.(Ser198Arg) in the PRPH2 gene and the variant c.1691A>G, p.(Asp564Gly) in the ATF6 gene that we have already reported to be pathogenic. NGS on the IRD panel allowed the molecular basis of CRD to be identified in four out of 14 families with a total detection rate of 38%. WES allowed identification of the molecular genetic basis of CRD in one family.
Conclusions: This is the first report on the spectrum of disease genes and pathogenic variants causing CRD in the Polish population. The study presents five novel variants identified in four genes and therefore, broadens the spectrum of probable pathogenic variants associated with CRD.

PMID: 29769798 [PubMed - in process]

Categories: Literature Watch

Novel aggrecan variant, p. Gln2364Pro, causes severe familial nonsyndromic adult short stature and poor growth hormone response in Chinese children.

Deep learning - Fri, 2018-05-18 07:37
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Novel aggrecan variant, p. Gln2364Pro, causes severe familial nonsyndromic adult short stature and poor growth hormone response in Chinese children.

BMC Med Genet. 2018 May 16;19(1):79

Authors: Xu D, Sun C, Zhou Z, Wu B, Yang L, Chang Z, Zhang M, Xi L, Cheng R, Ni J, Luo F

Abstract
BACKGROUND: Mutations in the aggrecan (ACAN) gene can cause short stature (with heterogeneous clinical phenotypes), impaired bone maturation, and large variations in response to growth hormone (GH) treatment. For such cases, long-term longitudinal therapy data from China are still scarce. We report that a previously unknown ACAN gene variant reduces adult height and we analyze the GH response in children from an affected large Chinese family.
METHODS: Two children initially diagnosed with idiopathic short stature (ISS) and a third mildly short child from a large Chinese family presented with poor GH response. Genetic etiology was identified by whole exome sequencing and confirmed via Sanger sequencing. Adult heights were analyzed, and the responses to GH treatment of the proband and two affected relatives are summarized and compared to other cases reported in the literature.
RESULTS: A novel ACAN gene variant c.7465 T > C (p. Gln2364Pro), predicted to be disease causing, was discovered in the children, without evident syndromic short stature; mild bone abnormity was present in these children, including cervical-vertebral clefts and apophyses in the upper and lower thoracic vertebrae. Among the variant carriers, the average adult male and female heights were reduced by - 5.2 and - 3.9 standard deviation scores (SDS), respectively. After GH treatment of the three children, first-year heights increased from 0.23 to 0.33 SDS (cases in the literature: - 0.5 to 0.8 SDS), and the average yearly height improvement was 0.0 to 0.26 SDS (cases in the literature: - 0.5 to 0.9 SDS).
CONCLUSIONS: We report a novel pathogenic ACAN variant in a large Chinese family which can cause severe adult nonsyndromic short stature without evident family history of bone disease. The evaluated cases and the reports from the literature reveal a general trend of gradually diminishing yearly height growth (measured in SDS) over the course of GH treatment in variant-carrying children, highlighting the need to develop novel management regimens.

PMID: 29769040 [PubMed - in process]

Categories: Literature Watch

Exploring the effect of Vitamin E in Cancer Chemotherapy- A Biochemical and Biophysical Insight.

Drug-induced Adverse Events - Fri, 2018-05-18 07:37
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Exploring the effect of Vitamin E in Cancer Chemotherapy- A Biochemical and Biophysical Insight.

J Biophotonics. 2018 May 16;:e201800104

Authors: Bhori M, Singh K, Marar T, MuraliKrishna C

Abstract
Many oncologists contend that patient undergoing chemotherapy must avoid antioxidant supplementation as it may interfere with the activity of the drug. In the present investigation, we have explored the influence of vitamin E, a well known antioxidant on Camptothecin (CPT), a potent anti-cancer drug induced cell apoptosis and death of cervical cancer cells. HeLa cells were treated with different concentrations of CPT in presence and absence of 100μm vitamin E. Treated cells were subjected to cytotoxicity studies, catalase assay, DNA fragmentation assay, clonogenic assay and flow cytometry based apoptosis detection. Also, Raman spectroscopy a label free technique which provides global information in conjunction with multivariate tools like PCA, PCLDA and FDA, was investigated to explore vitamin E supplementation induced alterations. Our data based on biochemical and biophysical experimental analysis reveals that CPT causes DNA damage along with protein and lipid alteration culminating in cell death. Importantly, Raman spectroscopic analysis could uniquely differentiate the cluster of control and vitamin E control from CPT and CPT+Vit E treated cells. We conclusively prove that presence of vitamin E at 100μM concentration shows promising antioxidant activity and displays no modulatory role on CPT induced effect, thereby causing no possible hindrance with the efficacy of the drug. Vitamin E may prove beneficial to alleviate chemotherapy associated side effects in patients during clinical settings which may open the doors further for subsequent exploration in in vivo pre clinical studies. This article is protected by copyright. All rights reserved.

PMID: 29770585 [PubMed - as supplied by publisher]

Categories: Literature Watch

The struggle to do no harm in clinical trials.

Drug-induced Adverse Events - Fri, 2018-05-18 07:37
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The struggle to do no harm in clinical trials.

Nature. 2017 12 21;552(7685):S74-S75

Authors: Schmidt C

PMID: 29293235 [PubMed - indexed for MEDLINE]

Categories: Literature Watch

Neuropsychiatric adverse drug reactions in children initiated on montelukast in real-life practice.

Drug-induced Adverse Events - Fri, 2018-05-18 07:37
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Neuropsychiatric adverse drug reactions in children initiated on montelukast in real-life practice.

Eur Respir J. 2017 Aug;50(2):

Authors: Benard B, Bastien V, Vinet B, Yang R, Krajinovic M, Ducharme FM

Abstract
Although montelukast is generally well tolerated, postmarketing studies have reported serious neuropsychiatric adverse drug reactions (ADRs) leading to a United States Food and Drug Administration black box warning. The objective of this study was to determine the incidence of neuropsychiatric ADRs leading to discontinuation of montelukast in asthmatic children.We conducted a retrospective cohort study in children aged 1-17 years initiated on montelukast. In a nested cohort study, children initiated on montelukast as monotherapy or adjunct therapy to inhaled corticosteroids (ICS) were matched to those initiated on ICS monotherapy. A non-leading parental interview served to ascertain the occurrence of any ADRs with any asthma medication, and circumstances related to, and evolution of, the event.Out of the 106 participants who initiated montelukast, most were male (58%), Caucasian (62%) with a median (interquartile range) age of 5 (3-8) years. The incidence (95% CI) of drug cessation due to neuropsychiatric ADRs was 16 (10-26)%, mostly occurring within 2 weeks. Most frequent ADRs were irritability, aggressiveness and sleep disturbances. The relative risk of neuropsychiatric ADRs associated with montelukast versus ICS was 12 (2-90).In the real-life setting, asthmatic children initiated on montelukast experienced a notable risk of neuropsychiatric ADRs leading to drug cessation, that is significantly higher than that associated with ICS.

PMID: 28818882 [PubMed - indexed for MEDLINE]

Categories: Literature Watch

Adverse events of prophylactic anti-influenza agents in medical staffs.

Drug-induced Adverse Events - Fri, 2018-05-18 07:37
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Adverse events of prophylactic anti-influenza agents in medical staffs.

J Infect Chemother. 2017 Oct;23(10):683-686

Authors: Kato H, Hagihara M, Kato Y, Kurumiya A, Takahashi T, Sakata M, Nishiyama N, Asai N, Koizumi Y, Furui T, Yamagishi Y, Mikamo H

Abstract
BACKGROUND: We undertook a survey to evaluate the compliance and the tolerability of oseltamivir and zanamivir when they were used as post-exposure prophylaxis among the medical staffs in the 2014-2015 seasons to understand a characteristic of adverse events caused by anti-influenza (flu) agents.
MATERIALS AND METHODS: During the study period, 540 medical staffs received oseltamivir (75 mg twice a day for 5 days) or zanamivir (twice a day for 5 days) as post-exposure prophylaxis of influenza, respectively.
RESULTS: Four hundred eleven medical staffs of 540 medical staffs (76.1%) provided responses to questionnaire investigations. The adverse events caused by oseltamivir were reported by 86 of 382 medical staffs (22.5%). The most frequent adverse events were gastrointestinal adverse events (13.4%), followed by systemic and local diseases (11.8%), diseases of the nervous system (7.9%) and neuropsychiatric adverse events (0.5%). On the other hand, adverse events caused by zanamivir were reported by one (3.4%) of 29 medical staffs.
CONCLUSION: Our survey revealed that 22.5% subjects experienced any adverse events due to oseltamivir. And the regimen showed low compliance than we expected. On the other hands, zanamivir showed high adherence with lower incidence of adverse events.

PMID: 28781099 [PubMed - indexed for MEDLINE]

Categories: Literature Watch

Identification and Characterization of Adverse Drug Events in Primary Care.

Drug-induced Adverse Events - Fri, 2018-05-18 07:37
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Identification and Characterization of Adverse Drug Events in Primary Care.

Am J Med Qual. 2017 Sep/Oct;32(5):518-525

Authors: Trinkley KE, Weed HG, Beatty SJ, Porter K, Nahata MC

Abstract
The purpose of this study was to identify and characterize adverse drug events (ADEs) in a primary care setting using an electronic health record (EHR). This prospective, observational study enrolled patients with any medication change who were seen at an outpatient internal medicine clinic. Patients were evaluated for ADEs by EHR review and telephone interview. ADEs were independently assessed for causality, severity, preventability, and ameliorability by a physician and a pharmacist using a grading instrument. There were 1368 unique medication changes for 701 individuals who completed the study (1.95 changes per person). Of the 226 suspected ADEs, 68 (58%) were deemed to be "definite" or "probable" following causality assessment; 21% were preventable and 40% ameliorable. Only 2 ADEs were serious or life-threatening. Compared with prior reports, ADEs in primary care have decreased in frequency and severity, yet the occurrence of preventable and ameliorable ADEs has increased.

PMID: 27561696 [PubMed - indexed for MEDLINE]

Categories: Literature Watch

[Systematic review on safety of Xinyuan capsules].

Drug-induced Adverse Events - Fri, 2018-05-18 07:37
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[Systematic review on safety of Xinyuan capsules].

Zhongguo Zhong Yao Za Zhi. 2016 May;41(9):1744-1753

Authors: Wang JD, Xie YM, Liao X, Cui RZ

Abstract
To systematically review the adverse drug reactions/adverse events(ADRs/AEs) of Xinyuan capsules in clinical application. A systematic literature search was performed in the databases of the Cochrane Library, Medline, EMBASE, the Web of Science, Clinical trials, CNKI, VIP, WanFang Data and CBM. The literature was screened and data was extracted according to the inclusion and exclusion criteria. Because of the substantial heterogeneity among different studies, we assessed them only with descriptive analysis by study type, disease diagnosis, and ADRs/AEs conditions. All included studies were assessed by using the internationally recognized report quality evaluation standard or methodological quality assessment tools. A total of 42 studies involving 3 671 patients were included finally. Two thouand four hundred and thirty-mine patients of them took Xinyuan capsules, and 1 242 patients did not take Xinyuan capsules. No serious ADRs occurred in all patients. One patient died as AE during the research. Sixteen patients of the 2 439 patients taking Xinyuan capsules (alone or in combination) had ADRs, including 7 patients with polytherapy of Xinyuan capsules and 9 patients with monotherapy. The most common ADRs were in gastrointestinal tract, mainly including thirst, nausea, vomiting and abdominal pain, etc. The ADRs included 10 gastrointestinal tract ADRs, 3 renal ADRs and 1 ADR respective in skin system, respiratory system and cardiovascular system. Xinyuan capsules was generally safe in clinical application. The reports on the study of Xinyuan capsules were dispersed in various clinical studies, the study on drug safety still should be strengthened in the future. Further mechanism studies or clinical observation studies of the drug safety shall be conducted to better guide clinical application in the future.

PMID: 28891628 [PubMed - indexed for MEDLINE]

Categories: Literature Watch

Detection of Bacteriophage Particles Containing Antibiotic Resistance Genes in the Sputum of Cystic Fibrosis Patients.

Cystic Fibrosis - Fri, 2018-05-18 04:32
Related Articles

Detection of Bacteriophage Particles Containing Antibiotic Resistance Genes in the Sputum of Cystic Fibrosis Patients.

Front Microbiol. 2018;9:856

Authors: Brown-Jaque M, Rodriguez Oyarzun L, Cornejo-Sánchez T, Martín-Gómez MT, Gartner S, de Gracia J, Rovira S, Alvarez A, Jofre J, González-López JJ, Muniesa M

Abstract
Cystic fibrosis (CF) is a chronic disease in which the bacterial colonization of the lung is linked to an excessive inflammatory response that leads to respiratory failure. The microbiology of CF is complex. Staphylococcus aureus is the first bacterium to colonize the lungs in 30% of pediatric CF patients, and 80% of adult patients develop a chronic Pseudomonas aeruginosa infection, but other microorganisms can also be found. The use of antibiotics is essential to treat the disease, but antibiotic performance is compromised by resistance mechanisms. Among various mechanisms of transfer of antibiotic resistance genes (ARGs), the recently been reported bacteriophages are the least explored in clinical settings. To determine the role of phages in CF as mobile genetic elements (MGEs) carrying ARGs, we evaluated their presence in 71 CF patients. 71 sputum samples taken from these patients were screened for eight ARGs (blaTEM, blaCTX-M-1-group, blaCTX-M-9-group, blaOXA-48, blaVIM, mecA, qnrA, and qnrS) in the bacteriophage DNA fraction. The phages found were also purified and observed by electron microscopy. 32.4% of CF patients harbored ARGs in phage DNA. β-lactamase genes, particularly blaVIM and blaTEM, were the most prevalent and abundant, whereas mecA, qnrA, and qnrS were very rare. Siphoviridae phage particles capable of infecting P. aeruginosa and Klebsiella pneumoniae were detected in CF sputum. Phage particles harboring ARGs were found to be abundant in the lungs of both CF patients and healthy individuals and could contribute to the colonization of multiresistant strains.

PMID: 29765367 [PubMed]

Categories: Literature Watch

"systems biology"; +36 new citations

Systems Biology - Thu, 2018-05-17 19:27

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"systems biology"

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PubMed comprises more than millions of citations for biomedical literature from MEDLINE, life science journals, and online books. Citations may include links to full-text content from PubMed Central and publisher web sites.

Categories: Literature Watch

BRAIN Initiative: Exploratory Team-Research BRAIN Circuit Programs - eTeamBCP (U01 Clinical Trial Not Allowed)

Funding Opportunity RFA-NS-18-029 from the NIH Guide for Grants and Contracts. The purpose of this FOA is to promote the integration of experimental, analytic, and theoretical capabilities for large-scale analysis of neural systems and circuits. This FOA seeks applications for exploratory research studies that use new and emerging methods for large scale recording and manipulation of neural circuits across multiple brain regions. Applications should propose to elucidate the contributions of dynamic circuit activity to a specific behavioral or neural system. Applications should seek to understand circuits of the central nervous system by systematically controlling stimuli and/or behavior while actively recording and/or manipulating relevant dynamic patterns of neural activity and by measuring the resulting behaviors and/or perceptions. Studies should incorporate rich information on cell-types, on circuit functionality and connectivity, and should be performed in conjunction with sophisticated analysis of complex, ethologically relevant behaviors. Applications should propose teams of investigators that seek to cross boundaries of interdisciplinary collaboration by bridging fields and linking theory and data analysis to experimental design. Exploratory studies supported by this FOA are intended to develop experimental capabilities and quantitative, theoretical frameworks in preparation for a future competition for larger-scale, multi-component, Team-Research BRAIN Circuit Programs (U19).

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