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1.
Nat Commun ; 14(1): 2026, 2023 04 11.
Artigo em Inglês | MEDLINE | ID: mdl-37041148

RESUMO

Craniofacial microsomia (CFM; also known as Goldenhar syndrome), is a craniofacial developmental disorder of variable expressivity and severity with a recognizable set of abnormalities. These birth defects are associated with structures derived from the first and second pharyngeal arches, can occur unilaterally and include ear dysplasia, microtia, preauricular tags and pits, facial asymmetry and other malformations. The inheritance pattern is controversial, and the molecular etiology of this syndrome is largely unknown. A total of 670 patients belonging to unrelated pedigrees with European and Chinese ancestry with CFM, are investigated. We identify 18 likely pathogenic variants in 21 probands (3.1%) in FOXI3. Biochemical experiments on transcriptional activity and subcellular localization of the likely pathogenic FOXI3 variants, and knock-in mouse studies strongly support the involvement of FOXI3 in CFM. Our findings indicate autosomal dominant inheritance with reduced penetrance, and/or autosomal recessive inheritance. The phenotypic expression of the FOXI3 variants is variable. The penetrance of the likely pathogenic variants in the seemingly dominant form is reduced, since a considerable number of such variants in affected individuals were inherited from non-affected parents. Here we provide suggestive evidence that common variation in the FOXI3 allele in trans with the pathogenic variant could modify the phenotypic severity and accounts for the incomplete penetrance.


Assuntos
Síndrome de Goldenhar , Animais , Camundongos , Síndrome de Goldenhar/patologia , Assimetria Facial , Linhagem , Fatores de Transcrição Forkhead
2.
Artigo em Inglês | MEDLINE | ID: mdl-36142107

RESUMO

PURPOSE: This retrospective study aims to compare the accuracy of two different CAD/CAM systems in orthognathic surgery. The novelty of this work lies in the method of evaluating the accuracy, i.e., using an Iterative Closest Point (ICP) algorithm, which matches a pair of 2D or 3D point clouds with unknown dependencies of the transition from scan s(k) to scan s(k+1). METHODS: The study population was composed of ten patients who presented to the Maxillofacial Surgery Department of the University "Sapienza" of Rome for the evaluation and management of skeletal malocclusions. The patients were divided into two groups, depending on the technique used: group 1: splintless group (custom-made cutting guide and plates); group 2: splint group (using a 3D-printed splint). STL files were imported into Geomagic® Control X™ software, which allows for comparison and analysis using an ICP algorithm. The RMSE parameter (3D error) was used to calculate the accuracy. In addition, data were compared in two different patient subgroups. The first subgroup only underwent a monobloc Le Fort I osteotomy (p-value = 0.02), and the second subgroup underwent a Le Fort I osteotomy associated with a segmental osteotomy of the maxilla (p-value = 0.23). RESULTS: Group 1 showed a 3D error of 1.22 mm ± SD 0.456, while group 2 showed a 3D error of 1.63 mm ± SD 0.303. These results have allowed us to compare the accuracy of the two CAD/CAM systems (p-value = 0.09). CONCLUSIONS: The ICP algorithm provided a reproducible method of comparison. The splintless method would seem more accurate (p-value = 0.02) in transferring the surgical programming into the operating room when only a Le Fort I osteotomy is to be performed.


Assuntos
Cirurgia Ortognática , Cirurgia Assistida por Computador , Algoritmos , Desenho Assistido por Computador , Humanos , Imageamento Tridimensional , Maxila/diagnóstico por imagem , Maxila/cirurgia , Estudos Retrospectivos , Cirurgia Assistida por Computador/métodos
3.
J Pers Med ; 12(6)2022 May 25.
Artigo em Inglês | MEDLINE | ID: mdl-35743654

RESUMO

Invasive lobular carcinoma is the second most common histologic form of breast cancer, representing 5% to 15% of all invasive breast cancers. Due to an insidious proliferative pattern, invasive lobular carcinoma remains clinically and radiologically elusive in many cases. Breast magnetic resonance imaging (MR) is considered the most accurate imaging modality in detecting and staging invasive lobular carcinoma and it is strongly recommended in pre-operative planning for all ILC. Contrast-enhanced spectral mammography (CESM) is a new diagnostic method that enables the accurate detection of malignant breast lesions similar to that of breast MR. CESM is also a promising breast imaging method for planning surgeries. In this study, we compare the ability of contrast-enhanced spectral mammography (CESM) with breast MR in the preoperative assessment of the extent of invasive lobular carcinoma. All patients with proven invasive lobular carcinoma treated in our breast cancer center underwent preoperative breast MRI and CESM. Images were reviewed by two dedicated breast radiologists and results were compared to the reference standard histopathology. CESM was similar and in some cases more accurate than breast MR in assessing the extent of disease in invasive lobular cancers. Further evaluation in larger prospective randomized trials is needed to validate our preliminary results.

4.
Foods ; 11(5)2022 Feb 28.
Artigo em Inglês | MEDLINE | ID: mdl-35267348

RESUMO

In the present study, six Lactococcus lactis and seven Lactiplantibacillus plantarum strains isolated from artisanal Sardinian dairy products were evaluated for their efficacy in controlling the growth of Listeria monocytogenes during the storage of miniature fresh cheese manufactured on a laboratory scale to exploit their possible use as biopreservatives. The strains were tested for antimicrobial activity and some technological characteristics before using them in miniature fresh cheese to evaluate their in situ antilisterial effect. Our results showed that five strains (L. lactis 16FS16-9/20234-11FS16 and Lpb. plantarum 1/14537-4A/20045) could be considered suitable candidates for use as protective cultures in fresh cheese manufacture since they significantly lowered the pathogen counts by 3-4 log units compared to the control; however, all strains tested were capable of decreasing L. monocytogenes numbers. Our results suggest that the single and combined action of the acidifying power and the production of bacteriocin of these strains was capable of controlling and/or reducing the growth of L. monocytogenes. Considering their technological characteristics, they might be used as starter/adjunct cultures to increase the safety of the products, perhaps in association with other antimicrobial hurdles.

5.
Ann Ital Chir ; 92: 271-279, 2022.
Artigo em Inglês | MEDLINE | ID: mdl-35333194

RESUMO

AIM: The main focus of this paper was to describe our experience in the management of primary lesions involving the orbit, analyzing signs and symptoms and illustrating surgical management. MATERIAL OF STUDY: We describe our experience managing 62 consecutive patients diagnosed with orbital tumors confined to the orbital content (not involving skin or bone, with no intracranial invasion) and treated between January 2013 and December 2016. Demographic characteristics, symptoms, clinical findings, histological types and approaches have been recorded. RESULTS: We found that the most common clinical manifestations were exophthalmos/proptosis and ocular movement impairment; the most common histological types were vascular malformation and ocular adnexal lymphomas. DISCUSSION: Primary neoplasms involving orbital contents include a broad spectrum of pathologies difficult to manage without a firm diagnosis, usually histological. Different surgical accesses are described in order to perform incisional biopsy or resection of the mass. CONSCLUSION: In every case, accurate surgical planning is mandatory, in order to prevent functional and/or aesthetic complications. KEY WORDS: Blepharoplasty incision, Intraorbital neoplasia, Lateral orbital tumor, Orbitotomy, Surgical treatment, Transconjunctival approach.


Assuntos
Exoftalmia , Neoplasias Orbitárias , Cirurgiões , Biópsia , Exoftalmia/etiologia , Exoftalmia/cirurgia , Humanos , Órbita/patologia , Órbita/cirurgia , Neoplasias Orbitárias/diagnóstico , Neoplasias Orbitárias/cirurgia
6.
Clin Neurophysiol Pract ; 6: 185-188, 2021.
Artigo em Inglês | MEDLINE | ID: mdl-34258479

RESUMO

BACKGROUND: Typical absence seizures (AS) are epileptic phenomena typically appearing in children 4-15 years of age and can be elicited by hyperventilation (HV). Hyperventilation-induced high-amplitude rhythmic slowing (HIHARS) represents a paraphysiological response during HV and may manifest with alteration of awareness (HIHARSAA). To date, HIHARSAA has mostly been described in patients without epilepsy. AIM: To describe five patients with treatment-responsive typical AS who, after becoming seizure free, presented with HIHARSAA. METHODS: By using video-electroencephalographic recording (Video-EEG), we describe differential clinical characteristics and ictal electrophysiological patterns of both typical AS and HIHARSAA. RESULTS: We demonstrate that when HIHARSAA occurs in patients with typical AS there is a temporal window between the two phenomena. This suggests that the presence of typical AS precludes the appearance of HIHARSAA. CONCLUSIONS: We hypothesize that alkalosis and dysfunction of the same neural network are involved in both typical AS and HIHARSAA and that their distinct electroclinic manifestations are due to the involvement of different ion channels. SIGNIFICANCE: A better understanding of the characteristics of typical AS and HIHARSAA and of the role of alkalosis in both, can help avoiding misdiagnosis and identifying more suitable therapies for typical AS.

7.
Front Neurol ; 12: 679354, 2021.
Artigo em Inglês | MEDLINE | ID: mdl-34135856

RESUMO

Background: Glucose-transporter-1 deficiency syndrome (GLUT1-DS), due to SLC2A1 gene mutation, is characterized by early-onset seizures, which are often drug-resistant, developmental delay, and hypotonia. Hemiplegic migraine (HM) is a rare form of migraine, defined by headache associated with transient hemiplegia, and can be caused by mutations in either CACNA1A, ATP1A2, or SCN1A. Paroxysmal movements, other transient neurological disorders, or hemiplegic events can occur in GLUT1-DS patients with a mild phenotype. Case: We report on a girl with GLUT1-DS, due to SLC2A1 mutation, with a mild phenotype. In early childhood, she developed epilepsy and mild cognitive impairment, balance disorders, and clumsiness. At the age of 9, the patient reported a first hemiplegic episode, which regressed spontaneously. Over the next 3 years, two similar episodes occurred, accompanied by headache. Therefore, in the hypothesis of HM, genetic testing was performed and CACNA1A mutation was identified. The treatment with Lamotrigine avoided the recurrence of HM episodes. Discussion: To our knowledge, among the several cases of GLUT1-DS with HM symptoms described in the literature, genetic testing was only performed in two of them, which eventually proved to be negative. In all other cases, no other genes except for SLC2A1 were examined. Consequently, our patient would be the first description of GLUT1-DS with HM due to CACNA1A mutation. We would emphasize the importance of performing specific genetic testing in patients with GLUT1-DS with symptoms evocative of HM, which may allow clinicians to use specific pharmacotherapy.

8.
J Pers Med ; 11(6)2021 May 25.
Artigo em Inglês | MEDLINE | ID: mdl-34070278

RESUMO

Axillary lymph node metastases of occult breast cancer (CUPAx) is an unusual condition that represents both a diagnostic and therapeutic challenge. The first steps in the diagnostic work-up of patients with CUPAx are the histological analysis of the lymph node metastasis and the execution of basic breast diagnostic imaging (mammography and ultrasound). In the case of occult breast cancer, breast Magnetic Resonance (MR) must be performed. Breast MR identifies a suspicious lesion in many patients and second-look ultrasound detects a corresponding ultrasound alteration in about half of cases, allowing the performance of a US-guided biopsy. In the case of an MR-only lesion, MR-guided biopsy is mandatory. We present a case of CUPAx in which contrast-enhanced spectral mammography (CESM) is used to help the detection of occult breast cancer and to guide stereotactic vacuum breast biopsy (VABB). CESM is a new breast imaging technique that is proving to have good performance in breast cancer detection and that is showing potential in the identification of occult breast cancer in a CUPAx setting. The use of an innovative and personalized breast imaging approach in breast cancer patients improves diagnostic possibilities and promises to become the focus in decision strategies.

9.
Clin Genet ; 100(3): 268-279, 2021 09.
Artigo em Inglês | MEDLINE | ID: mdl-33988253

RESUMO

Oculo-auriculo-vertebral spectrum (OAVS) is a developmental disorder of craniofacial morphogenesis. Its etiology is unclear, but assumed to be complex and heterogeneous, with contribution of both genetic and environmental factors. We assessed the occurrence of copy number variants (CNVs) in a cohort of 19 unrelated OAVS individuals with congenital heart defect. Chromosomal microarray analysis identified pathogenic CNVs in 2/19 (10.5%) individuals, and CNVs classified as variants of uncertain significance in 7/19 (36.9%) individuals. Remarkably, two subjects had small intragenic CNVs involving DACH1 and DACH2, two paralogs coding for key components of the PAX-SIX-EYA-DACH network, a transcriptional regulatory pathway controlling developmental processes relevant to OAVS and causally associated with syndromes characterized by craniofacial involvement. Moreover, a third patient showed a large duplication encompassing DMBX1/OTX3, encoding a transcriptional repressor of OTX2, another transcription factor functionally connected to the DACH-EYA-PAX network. Among the other relevant CNVs, a deletion encompassing HSD17B6, a gene connected with the retinoic acid signaling pathway, whose dysregulation has been implicated in craniofacial malformations, was also identified. Our findings suggest that CNVs affecting gene dosage likely contribute to the genetic heterogeneity of OAVS, and implicate the PAX-SIX-EYA-DACH network as novel pathway involved in the etiology of this developmental trait.


Assuntos
Variações do Número de Cópias de DNA , Síndrome de Goldenhar/genética , Cardiopatias Congênitas/genética , Adolescente , Adulto , Criança , Pré-Escolar , Estudos de Coortes , Feminino , Síndrome de Goldenhar/fisiopatologia , Humanos , Lactente , Recém-Nascido , Masculino , Análise em Microsséries , Polimorfismo de Nucleotídeo Único , Adulto Jovem
11.
Int J Mol Sci ; 22(3)2021 Jan 26.
Artigo em Inglês | MEDLINE | ID: mdl-33530447

RESUMO

Oculo-auriculo-vertebral-spectrum (OAVS; OMIM 164210) is a rare disorder originating from abnormal development of the first and second branchial arch. The clinical phenotype is extremely heterogeneous with ear anomalies, hemifacial microsomia, ocular defects, and vertebral malformations being the main features. MYT1, AMIGO2, and ZYG11B gene variants were reported in a few OAVS patients, but the etiology remains largely unknown. A multifactorial origin has been proposed, including the involvement of environmental and epigenetic mechanisms. To identify the epigenetic mechanisms contributing to OAVS, we evaluated the DNA-methylation profiles of 41 OAVS unrelated affected individuals by using a genome-wide microarray-based methylation approach. The analysis was first carried out comparing OAVS patients with controls at the group level. It revealed a moderate epigenetic variation in a large number of genes implicated in basic chromatin dynamics such as DNA packaging and protein-DNA organization. The alternative analysis in individual profiles based on the searching for Stochastic Epigenetic Variants (SEV) identified an increased number of SEVs in OAVS patients compared to controls. Although no recurrent deregulated enriched regions were found, isolated patients harboring suggestive epigenetic deregulations were identified. The recognition of a different DNA methylation pattern in the OAVS cohort and the identification of isolated patients with suggestive epigenetic variations provide consistent evidence for the contribution of epigenetic mechanisms to the etiology of this complex and heterogeneous disorder.


Assuntos
Metilação de DNA , Epigênese Genética , Estudo de Associação Genômica Ampla , Síndrome de Goldenhar/diagnóstico , Síndrome de Goldenhar/genética , Biologia Computacional/métodos , Ilhas de CpG , Feminino , Perfilação da Expressão Gênica , Estudos de Associação Genética , Predisposição Genética para Doença , Estudo de Associação Genômica Ampla/métodos , Humanos , Masculino , Anotação de Sequência Molecular , Fenótipo
12.
Am J Med Genet A ; 185(3): 978-981, 2021 03.
Artigo em Inglês | MEDLINE | ID: mdl-33314579

RESUMO

Koolen-de Vries syndrome (KdVS, MIM#610443) is a rare malformation condition mainly characterized by cognitive impairment in association with craniofacial and visceral anomalies. The core phenotype is caused by mutations in the chromatin remodeler KANSL1 (MSL1V1, KIAA1267, KAT8 Regulatory NSL Complex Subunit 1, MIM#612452), which maps to 17q21.31 critical genomic region (Koolen et al., Nature Genetics 2012;44:639-641). Considering its molecular basis, KdVS is included in the group of Developmental Disorders of Chromatin Remodeling (DDCRs), also termed chromatinopathies. We describe the first KdVS patient of Southern India ethnicity, harboring the typical de novo 17q21.31 microdeletion, including KANSL1. Observed facial features and congenital anomalies are in line with the already reported KdVS phenotype, suggesting that phenotypic features are consistent across different ethnicities.


Assuntos
Anormalidades Múltiplas/etnologia , Deficiência Intelectual/etnologia , Proteínas Nucleares/genética , Anormalidades Múltiplas/genética , Adulto , Envelhecimento , Deleção Cromossômica , Cromossomos Humanos Par 17/genética , Cromossomos Humanos Par 17/ultraestrutura , Etnicidade/genética , Face/anormalidades , Feminino , Comunicação Interatrial/genética , Comunicação Interatrial/cirurgia , Humanos , Índia , Recém-Nascido , Recém-Nascido Prematuro , Doenças do Prematuro/genética , Deficiência Intelectual/genética , Má Oclusão Classe III de Angle/genética , Fenótipo , Deleção de Sequência
13.
J Craniofac Surg ; 32(4): e346-e349, 2021 Jun 01.
Artigo em Inglês | MEDLINE | ID: mdl-33170830

RESUMO

ABSTRACT: The epidemiology of maxillofacial fractures is variable in different geographic regions. Economic and social conditions, laws and types of behavior can be considered the most important factors influencing these differences.Mandibular fractures were first cited in 1650 BC in an Egyptian papyrus. Today, these fractures are one of the most prevalent facial skeletal injuries.A 4-year retrospective study was performed and the trauma - related data were collected from medical and radiological archives. The analysis comprised patients admitted for mandibular fracture at Sapienza University of Rome - Policlinico Umberto I between January 1, 2016 and December 31, 2019. The data include age, sex, etiology, anatomical sites of the fractures, eventual maxillofacial associated fractures and treatment.We collected 172 patients, 138 males (80.2%) and 34 females (19.8%) with 270 mandibular fractures. The average age was 35.4 years. The youngest and oldest patients were aged 6 and 90 years, respectively. The age group 20 to 29 years was the most represented with 52 patients (30.2% of the total sample). Assaults were the most common etiology (n = 53, 30.8%), followed by falls (n = 45, 26.2%). The condyle was the most involved region (n = 86, 32%), followed by parasymphysis region (n = 72, 26.6%) and angle (n = 62, 23%).154 patients (89.5%) reported only mandibular fractures. Eighteen patients (10.5%) had other associated maxillofacial fractures; the most frequently encountered maxillofacial fractures associated with mandibular fractures were the zygomatic complex fractures (n = 9, 5.2%). Open reduction and internal fixation was the most preferred surgical treatment (n = 115, 66.9%).This study showed that mandibular fractures predominate in 20 to 29 years group and in the male sex. Assaults are the most frequent cause. The prevalent fracturing site is condylar process. Orbital - maxillary - zygomatic complex fractures were the most common associated maxillofacial fractures and open reduction and internal fixation was the preferred surgical strategy.The results of this analysis agree to other studies and provide important clinical information that will help in study of these injuries.


Assuntos
Fraturas Mandibulares , Fraturas Maxilares , Traumatismos Maxilofaciais , Fraturas Cranianas , Acidentes de Trânsito , Adulto , Fatores Etários , Feminino , Humanos , Itália/epidemiologia , Masculino , Côndilo Mandibular , Fraturas Mandibulares/diagnóstico por imagem , Fraturas Mandibulares/epidemiologia , Fraturas Mandibulares/cirurgia , Estudos Retrospectivos , Adulto Jovem
14.
Cancers (Basel) ; 13(1)2020 Dec 24.
Artigo em Inglês | MEDLINE | ID: mdl-33374237

RESUMO

The COVID-19 pandemic has significantly affected the surgical units, especially those operating on the airways. This study evaluates the series of patients with tumors of the head and neck treated by our unit during Phase-1 of the pandemic and the efficacy of the preventive measures implemented for protecting both the patients and staff. A screening program was administered to all the patients who had to undergo surgery. None of the patients tested and operated during Phase 1, between 10 March and 18 May 2020, were positive for COVID-19. A significant portion of the patients was suffering from tumors in advanced stages (T3 and T4). Two patients developed respiratory symptoms during their stay at the unit, so they were put in precautionary isolation and tested, but resulted negative for COVID-19. All the surgical department staff followed the Italian Ministry of Health's prevention protocol and underwent serological testing. IgG and IgM were negative in everyone, thus confirming that nobody had been exposed to the virus. This study highlights the commitment to efficiently treating patients suffering from tumors of the head and neck region and confirms the effectiveness of the safety measures used to protect our patients and staff's health.

15.
Front Microbiol ; 11: 583745, 2020.
Artigo em Inglês | MEDLINE | ID: mdl-33193226

RESUMO

The present study was undertaken to produce probiotic Caciotta cheeses from pasteurized ewes' milk by using different combinations of autochthonous microbial cultures, containing putative probiotic strains, and evaluate their influence on gross composition, lipid components, sensory properties and microbiological and metabolite profiles of the cheeses throughout ripening process. A control cheese was produced using commercial starter cultures. The hydrophilic molecular pools (mainly composed by amino acids, organic acids, and carbohydrates) were characterized by means of 1H NMR spectroscopy, while the cholesterol, α-tocopherol and fatty acid composition by HPLC-DAD/ELSD techniques. Conventional culturing and a PCR-DGGE approach using total cheese DNA extracts were used to analyze cheese microbiota and monitor the presence and viability of starters and probiotic strains. Our findings showed no marked differences for gross composition, total lipids, total cholesterol, and fatty acid levels among all cheeses during ripening. Differently, the multivariate statistical analysis of NMR data highlighted significant variations in the cheese' profiles both in terms of maturation time and strains combination. The use of autochthonous cultures and adjunct probiotic strains did not adversely affect acceptability of the cheeses. Higher levels of lactobacilli (viability of 108-109 cfu/g of cheese) were detected in cheeses made with the addition of probiotic autochthonous strains with respect to control cheese during the whole ripening period, suggesting the adequacy of Caciotta cheese as a carrier for probiotic bacteria delivery.

16.
Int J Cancer ; 147(9): 2597-2610, 2020 11 01.
Artigo em Inglês | MEDLINE | ID: mdl-32483858

RESUMO

In our study, we investigated the role of CD39 on tumor-infiltrating CD8+ T lymphocytes (CD8+ TILs) in colorectal, head and neck and pancreatic cancers. Partially confirming recent observations correlating the CD39 expression with T-cell exhaustion, we demonstrated a divergent functional activity in CD39+ CD8+ TILs. On the one hand, CD39+ CD8+ TILs (as compared to their CD39- counterparts) produced significantly lower IFN-γ and IL-2 amounts, expressed higher PD-1, and inversely correlated with perforin and granzyme B expression. On the other, they displayed a significantly higher proliferative capacity ex vivo that was inversely correlated with the PD-1 expression. Therefore, CD39+ CD8+ TILs, including those co-expressing the CD103 (a marker of T resident memory [TRM] cells), were defined as partially dysfunctional T cells that correlate with tumor patients with initial progression stages. Interestingly, our results identified for the first time a single nucleotide polymorphism (SNP rs10748643 A>G), as a genetic factor associated with CD39 expression in CD8+ TILs. Finally, we demonstrated that compounds inhibiting CD39-related ATPases improved CD39+ CD8+ T-cell effector function ex vivo, and that CD39+ CD8+ TILs displayed effective suppression function in vitro. Overall these data suggest that the SNP analysis may represent a suitable predictor of CD39+ CD8+ T-cell expression in cancer patients, and propose the modulation of CD39 as a new strategy to restore partially exhausted CD8+ TILs.


Assuntos
Protocolos de Quimioterapia Combinada Antineoplásica/farmacologia , Apirase/metabolismo , Linfócitos do Interstício Tumoral/imunologia , Neoplasias/imunologia , Linfócitos T Citotóxicos/imunologia , Idoso , Idoso de 80 Anos ou mais , Protocolos de Quimioterapia Combinada Antineoplásica/uso terapêutico , Apirase/antagonistas & inibidores , Apirase/genética , Células Cultivadas , Feminino , Regulação Neoplásica da Expressão Gênica/imunologia , Humanos , Inibidores de Checkpoint Imunológico/farmacologia , Inibidores de Checkpoint Imunológico/uso terapêutico , Linfócitos do Interstício Tumoral/efeitos dos fármacos , Linfócitos do Interstício Tumoral/metabolismo , Masculino , Pessoa de Meia-Idade , Neoplasias/tratamento farmacológico , Neoplasias/genética , Neoplasias/patologia , Nivolumabe/farmacologia , Nivolumabe/uso terapêutico , Polimorfismo de Nucleotídeo Único , Cultura Primária de Células , Linfócitos T Citotóxicos/efeitos dos fármacos , Linfócitos T Citotóxicos/metabolismo
17.
Metabolomics ; 15(8): 113, 2019 08 17.
Artigo em Inglês | MEDLINE | ID: mdl-31422484

RESUMO

INTRODUCTION: Mass insect rearing is becoming increasingly pursued by food and feed industry due to its high sustainability and low environmental impact. Yellow mealworm larvae (Tenebrio molitor) are conventionally reared on wheat bran (WB), but alternative substrates, such as several by-products of the agri-food industry, have shown good prospects for insect rearing. OBJECTIVES: The objective of this study was to investigate on the metabolic and nutritional response of yellow mealworm larvae to dried brewer's spent grains (BSG) and WB used as rearing substrates. METHODS: Proximate, fibre and fatty acid compositions of durum WB and dried BSG were first characterized. Mealworm larvae were fed either WB (WB-L) or BSG (BSG-L) in a trial reproducing a scale rearing condition. Feed efficiency parameters together with proximate and FA composition were determined. Metabolic pathways affected by the dietary treatments were evaluated by means of a targeted metabolomics approach. Proton nuclear magnetic resonance (1H NMR) spectra were acquired on lipid and polar extracts of WB-L and BSG-L and then coupled to multivariate data analysis. Absolute quantitative 1H NMR data were carried out on selected metabolites. RESULTS: BSG-L exhibited better feed conversion ratio and efficiency in conversion of ingested food (P < 0.05) and almost half fat content (P < 0.001) than WB-L. BSG-L also showed higher ω-3 and ω-6 poliunsaturated fatty acids (P < 0.001) and lower content of monounsaturated fatty acids (P < 0.001) than WB-L. BSG-L mobilized body fat towards methylamine accumulation and led to enhanced trehalose catabolism. CONCLUSIONS: Our findings are useful to gain knowledge on the metabolic features that finally affect growth and body composition in reared yellow mealworm larvae.


Assuntos
Fibras na Dieta/metabolismo , Ácidos Graxos/metabolismo , Metabolômica , Ração Animal , Animais , Fibras na Dieta/administração & dosagem , Fibras na Dieta/análise , Ácidos Graxos/administração & dosagem , Ácidos Graxos/análise , Larva , Análise Multivariada , Espectroscopia de Prótons por Ressonância Magnética , Tenebrio
18.
Biomed Res Int ; 2019: 6131404, 2019.
Artigo em Inglês | MEDLINE | ID: mdl-31360718

RESUMO

This work was performed to study the microbiota of raw goat's milk (67 samples) collected in different areas of Sardinia, in order to select autochthonous lactic acid bacteria (LAB) strains for use in goat cheese manufacturing. Total mesophilic bacteria ranged between 105 and 107 cfu/mL; mean counts of Enterobacteriaceae did not exceed 4 log cfu/mL whereas those of E. coli and coagulase-positive staphylococci were lower than 1.5 and 2 log ufc /ml, respectively. Neither Salmonella spp. nor Listeria monocytogenes were recovered. The numbers of total LAB were in the range from 104 to 107 cfu/mL and mean yeasts counts varied between 103 and 105 cfu/mL. The most frequently isolated LAB species were Lactococcus lactis subsp. lactis and Lactobacillus paracasei. The presence of Enterococcus faecium was also noteworthy. The in vitro study of some functional characteristics related to technological properties of the strains belonging to these species allowed to point out some strains possessing good potential for use as adjunct or starter cultures in the production of cheese.


Assuntos
Bactérias , Queijo/microbiologia , Microbiologia de Alimentos , Microbiota , Leite/microbiologia , Animais , Bactérias/classificação , Bactérias/crescimento & desenvolvimento , Bactérias/isolamento & purificação , Cabras
20.
Biomed Res Int ; 2018: 3915615, 2018.
Artigo em Inglês | MEDLINE | ID: mdl-30112385

RESUMO

Fungal spoilage is one of the main causes of economic losses worldwide in the food industry. In the last years, consumer's demands for preservative-free processed foods have increased as a result of growing awareness about the health hazards associated with chemicals. Lactic acid bacteria have been extensively studied for their antibacterial and antifungal potential in order to be used as biopreservatives. The first objective of this study was to investigate in vitro the antifungal activity of autochthonous Lactobacillus strains against moulds commonly associated with cheese spoilage. Then, the Lactobacillus strains with the highest inhibitory effect and broadest spectrum were tested in single or mixed cultures against Penicillium chrysogenum ATCC 9179 and Aspergillus flavus ATCC 46283 on miniature Caciotta cheese produced at laboratory scale to evaluate in situ their ability to prevent mould growth and to determine their impact on cheese organoleptic properties and starter culture activity. The growth of the starter lactococcal population exhibited similar trend and values during ripening, suggesting that the addition of lactobacilli did not influence its growth and survival. Inhibition of P. chrysogenum inoculated in the milk was determined in cheeses produced with single or mixed Lactobacillus adjuncts as compared to cheeses without adjunct. The mixed adjunct cultures resulted in more effective, significantly reducing mould counts of more than 2 log units at the end of ripening. The application of the adjunct cultures resulted in a delay in mycelial growth of P. chrysogenum and A. flavus inoculated on the cheese surface as well. Finally, we found no significant differences among samples for the sensory parameters evaluated that received similar ratings. Our results indicate that the selected Lactobacillus strains may have a potential effect in controlling mould contamination on cheeses. Further studies are currently being carried out to identify the molecules responsible for the antifungal activity.


Assuntos
Queijo , Microbiologia de Alimentos , Fungos , Lactobacillus , Animais , Conservação de Alimentos , Leite
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