Prevention of the Werther effect: compliance of the Italian newspapers to the 'reporting on suicide' recommendations.

OBJECTIVES: Suicide media coverage could lead to imitation, the so-called 'Werther effect'. The World Health Organization (WHO) published specific recommendations for reporting suicide news. This study aimed to quantify the compliance of Italian newspapers with the WHO suicide reporting guidelines. STUDY DESIGN: This was a quantitative content analysis study. METHODS: All articles published by the three main Italian newspapers from June 2019 to May 2020 describing suicides or attempted suicides were included. The articles were analyzed using a checklist based on the WHO recommendations, which included 18 'negative' items (e.g. 'presence of the word 'suicide' in the title') and nine 'positive' items (e.g. 'the article reports the contacts of a suicide prevention hotline'). Each negative item was scored -1, and each positive item was scored +1. Multivariate linear regressions were performed to identify factors associated with lower adherence to WHO recommendations and higher social media engagement with the articles. RESULTS: A total of 3483 articles were screened, and 110 articles were included in the final analysis. The suicidal was male in 73.6% of cases. The median checklist score was -6 (interquartile range 3). Five percent of the articles had at least one positive item. The word 'suicide' was found in 90% of the titles. Female suicides were associated with a higher checklist score (coefficient 0.81, P = 0.039). No correlation was found between the checklist score and the social media engagement of the articles. CONCLUSIONS: Italian newspapers do not adhere completely to the WHO recommendations on reporting suicide, leading to a potential imitation effect. Public health professionals should make decision-makers and journalists aware of the importance of these recommendations.

Analysis of a direct access testing system for the detection of SARS-CoV-2 in the paediatric population attending school.

Background: During the COVID-19 pandemic, the paediatric population plays a minor role in the spread of the SARS-CoV-2 virus. However, in order to keep schools open and reduce SARS-CoV spreading, it is necessary to identify and isolate early SARS-CoV-2 positive paediatric patients even if they are asymptomatic. The aim of this study was to describe a setting for SARS-CoV 2 testing based on the spontaneous presentation of paediatric patients attending school without a medical prescription and explore its appropriateness. Study design: Cross-sectional study. Methods: The study performed between September 2020 and March 2021 among a sample of 13,283 paediatric patients who underwent a swab in four different hospital settings (school hot spot, emergency department, day hospital setting and hospital wards). For each patients we collected: date of swab execution, type of swab, execution setting of the swab, result of the swab, information about community spread of the virus in the 14 days prior to the swab execution, sex and age. Results: In our sample, females accounted for 45.8%. The median age was 6.8 years (IQR 3.0-11.2) and the most frequent age category was between 6 and 11 years (27.9%). At multivariable models with a swab tested positive as outcome. The swabs executed in all the hospital settings had a lower likelihood of resulting positive compared with the school hot spot setting. Compared with adolescents aged between 14 and 19 years old, new-borns below 3 months (adjOR 1.83, 95% C.I. 1.14-3) and patients aged between 11 and 14 years old (adjOR 1.32, 95% C.I. 1.07-1.63) reported a higher probability of a swab tested positive. Instead, children aged between 3 months and 3 years (adjOR 0.77, 95% C.I. 0.61-0.96) and children aged between 3 years and 6 years (adjOR 0.66, 95% C.I. 0.53-0.83) were less likely to result positive. The higher was the mean of pooled Rt in the 14 days preceding the swab, the higher was the likelihood of resulting positive (adjOR 1.75, 95% C.I. 1.53-1.99). Conclusion: In conclusion, we found a high incidence of paediatric patients positive to the test for the detection of SARS-CoV-2 at the school hot spot compared with other settings during the period of observation. The free access modality to the nasopharyngeal swab was effective in identifying patients with COVID-19. Public health authorities should implement these testing modality in order to help reduce the spread of SARS-CoV-2 in school settings.

Is the pandemic leading to a crisis of trust? Insights from an Italian nationwide study.

OBJECTIVES: Along with mistrust toward politics and journalism, the pandemic is amplifying mistrust in healthcare. To explore trust in key professionals among the Italian population, we focused on perceived change in trust during the pandemic. STUDY DESIGN: Nationwide online cross-sectional survey (called COCOS). METHODS: COCOS was conducted in Italy in two periods: the end of the first lockdown (T1: April-May 2020) and the end of 2020 (T2: November-December 2020). Descriptive analyses and multivariable logistic regressions were performed (sample size = 2673). RESULTS: Trust in healthcare workers (HCWs) was reduced in 1.5% of participants (T1) and 2.8% (T2). Trust in scientists/researchers was reduced in 5.8% (T1) and 7.6% (T2). Trust in politicians was reduced in 37.6% (T1) and 52.3% (T2). Trust in journalists was reduced in 41.7% (T1) and 48.3% (T2). Considering multivariable models, participants of the second period, participants who were HCWs, participants with anxiety symptoms, and those experiencing economic struggle due to the pandemic had a higher likelihood of having a reduced trust. The period had the strongest association with reduced trust. CONCLUSIONS: We argue that a central role might be played by the pandemic fatigue. We suggest leading figures should be more aware of the relationship between communication and trust. The pandemic is a real-world experiment in reshaping mediated communication and, although social media play an important role, other approaches might be successful. As a notable part of the population is trusting politicians and media less and less, Italian key professionals should implement initiatives to reinvigorate public support.

Witches' Broom Disease of Lime Contributes to Phytoplasma Epidemics and Attracts Insect Vectors.

An insect-transmitted phytoplasma causing Witches' Broom Disease of Lime (WBDL) is responsible for the drastic decline in lime production in several countries. However, it is unclear how WBDL phytoplasma (WBDLp) induces witches' broom symptoms and if these symptoms contribute to the spread of phytoplasma. Here we show that the gene encoding SAP11 of WBDLp (SAP11WBDL) is present in all WBDLp isolates collected from diseased trees. SAP11WBDL interacts with acid lime (Citrus aurantifolia) TCP transcription factors, specifically members of the TB1/CYC class that have a role in suppressing axillary branching in plants. Sampling of WBDLp-infected lime trees revealed that WBDLp titers and SAP11WBDL expression levels were higher in symptomatic leaves compared with asymptomatic sections of the same trees. Moreover, the witches' brooms were found to attract the vector leafhopper. Defense genes that have a role in plant defense responses to bacteria and insects are more downregulated in witches' brooms compared with asymptomatic sections of trees. These findings suggest that witches' broom-affected parts of the trees contribute to WBDL epidemics by supporting higher phytoplasma titers and attracting insect vectors.

Unlocking the full power of electrochemical fingerprinting for on-site sensing applications.

Electrochemical sensing for the semi-quantitative detection of biomarkers, drugs, environmental contaminants, food additives, etc. shows promising results in point-of-care diagnostics and on-site monitoring. More specifically, electrochemical fingerprint (EF)-based sensing strategies are considered an inviting approach for the on-site detection of low molecular weight molecules. The fast growth of electrochemical sensors requires defining the concept of direct electrochemical fingerprinting in sensing. The EF can be defined as the unique electrochemical signal or pattern, mostly recorded by voltammetric techniques, specific for a certain molecule that can be used for its quantitative or semi-quantitative identification in a given analytical context with specified circumstances. The performance of EF-based sensors can be enhanced by considering multiple features of the signal (i.e., oxidation or reduction patterns), in combination with statistical data analysis or sample pretreatments or by including electrode surface modifiers to enrich the EF. In this manuscript, some examples of EF-based sensors, strategies to improve their performances, and open challenges are discussed to unlock the full power of electrochemical fingerprinting for on-site sensing applications. Graphical abstract Electrochemical fingerprint-based sensing strategies can be used for the detection of electroactive analytes, such as antibiotics, phenolic compounds, and drugs of abuse. These strategies show selective and sensitive responses and are easily combined with portable devices.

Expressed sequence tags related to nitrogen metabolism in maize inoculated with Azospirillum brasilense.

The relative quantitative real-time expression of two expressed sequence tags (ESTs) codifying for key enzymes in nitrogen metabolism in maize, nitrate reductase (ZmNR), and glutamine synthetase (ZmGln1-3) was performed for genotypes inoculated with Azospirillum brasilense. Two commercial single-cross hybrids (AG7098 and 2B707) and two experimental synthetic varieties (V2 and V4) were raised under controlled greenhouse conditions, in six treatment groups corresponding to different forms of inoculation and different levels of nitrogen application by top-dressing. The genotypes presented distinct responses to inoculation with A. brasilense. Increases in the expression of ZmNR were observed for the hybrids, while V4 only displayed a greater level of expression when the plants received nitrogenous fertilization by top-dressing and there was no inoculation. The expression of the ZmGln1-3EST was induced by A. brasilense in the hybrids and the variety V4. In contrast, the variety V2 did not respond to inoculation.

Mapping research on LGBT+ persons' health: a bibliometric analysis.

AIMS: Lesbian, gay, bisexual, transgender and other people (LGBT+) individuals may have a greater risk of experiencing mental and physical health issues. In the past years, the predominant theme of research was HIV/AIDS and sexually transmitted infections (STIs). This study aimed to explore the most recent patterns in medical research concerning LGBT+ persons. METHODS: A bibliometric analysis using Biblioshiny was conducted. Based on previous studies, years of observation ranged between 2008 and 2021. Web of Science Core Collection was used. RESULTS: A total of 31,039 articles were selected. Top journals centered around HIV/AIDS and STIs (n = 6), followed by sexual behaviors/sexuality (n = 2) and LGBT+ health (n = 2). The US led in research output (n = 16,249). Papers were categorized into three main clusters (which showed different evolution across time): one addressing HIV/AIDS, STIs, and sexual behaviors, another focusing on mental health, discrimination, and stigma, and a third, smaller cluster examining transgender, intersex, and gender-diverse health. CONCLUSIONS: This article highlighted a growth in LGBT+ health research, uncovering research disparities among countries. While HIV/AIDS and STIs still dominated, a crucial theme concerning mental health, discrimination, and stigma has been rising. Declining interest in gender-diverse health, and disparities in research attention to different LGBT+ subgroups, underscored the need for more comprehensive and inclusive research to address complex health disparities.

Comparative high-resolution pQCT analysis of femoral neck indicates different bone mass distribution in osteoporosis and osteoarthritis.

SUMMARY: Osteoarthritis is linked to a reduced risk of femoral fracture despite osteoporosis. Different bone distribution in the femoral neck in osteoarthritis and fracture was revealed using a peripheral quantitative computed tomography (pQCT) comparative analysis. Our findings sustain the presence of an adaptive mechanism of bone structure providing fracture protection in osteoarthritis. INTRODUCTION: Although osteoarthritis is associated with reduced femoral fracture risk, it does not protect from bone loss. We investigated whether adaptive mechanisms are present at the arthritic joint, leading to reduced fracture risk, despite the presence of low bone mass density. METHODS: We performed pQCT comparative analyses of human femoral neck specimens derived from 32 postmenopausal women who received hip prostheses for osteoarthritis (n = 19) or femoral fracture (n = 13) by applying an in-house automated software to extract bone structure descriptors, characterize trabecular and cortical bone distribution, and evaluate their mutual relationships. RESULTS: The cortical bone volume and trabecular thickness were significantly (p < 0.05) higher in the osteoarthritis group than in the fracture group. Trabecular bone volume was also significantly (p < 0.05) higher in the osteoarthritis group than the fracture group at the inferior and anterior quadrants. Significance was maintained after adjusting for age, cortical bone volume, and cortical porosity thickness. Multiple linear regression analysis showed that thickness, volume, and apparent density of the trabecular region significantly (p < 0.05) correlated with the same cortical descriptors in osteoarthritis, but no significant relationship was found in the fracture group. Age differentially affected the mutual relationships in the two groups, showing a significant correlation with trabecular thickness in both groups and with apparent trabecular density only in femoral fracture group. CONCLUSIONS: Starting from these differences in the structural descriptors, our study sustains the presence of a compensatory mechanism in osteoarthritis to preserve the mechanical competence of bone structure, despite the loss of trabecular bone, underlying lower fracture risk.

Early neutral prebiotic oligosaccharide supplementation reduces the incidence of some allergic manifestations in the first 5 years of life.

BACKGROUND: A mixture of neutral prebiotic oligosaccharides has been shown to reduce the incidence of atopic dermatitis (AD) and allergy associated symptoms during the first 2 years of life. OBJECTIVE: To evaluate if this protective effect against allergy lasted beyond the intervention period until 5 y of age. METHODS: In a prospective, double blind, placebo-controlled fashion, healthy term infants at risk of atopy were fed either a prebiotic-supplemented (0.8 g/100 ml scGOS/lcFOS) or placebo-supplemented (0.8 g/100 ml maltodextrin) hypoallergenic formula during the first 6 mo of life. Following this intervention period, follow-up continued until 5 y of life. The present study evaluated (i) the cumulative incidence of allergic manifestations during 5 y, and (ii) the prevalence of allergic and persistent allergic manifestations at 5 y. Monitored allergic manifestations were AD, recurrent wheezing, allergic rhinoconjunctivitis and urticaria. RESULTS: Ninety-two children (50 in placebo group, 42 in intervention group) completed the 5-y follow-up. The 5-y cumulative incidences of any allergic manifestation and atopic dermatitis were significantly lower in the scGOS/lcFOS group (30.9, 19.1 %, respectively) compared to placebo group (66, 38 %, respectively) (p< 0.01 and< 0.05). Children in the scGOS/lcFOS group tended to have a lower incidence of allergic rhinoconjunctivitis, and allergic urticaria (4.8 vs 16% for both manifestations, p=0.08). There was no difference in the cumulative incidence of recurrent wheezing. With regard to the prevalences at 5 y, intervention group had significantly lower prevalence of any persistent allergic manifestation and rhinoconjunctivitis (4.8, 2.4 %, respectively) compared to placebo (26, 14 %, respectively) (p < 0.01 and =0.05). Prevalence of persistent AD tended to be lower in the intervention group (2.4 vs 12%, p= 0.09). Although intervention group had 75% reduction in the prevalence of persistent wheezing (4.8 vs 14 %), no significance was shown. CONCLUSION: Oligosaccharide prebiotics (scGOS/lcFOS), when started early in life have a protective effect against allergic manifestations in high risk infants. The protection lasts beyond infancy until 5 y of life, for AD and allergic rhinoconjunctivitis. Long-term follow-up studies in larger populations are warranted to evaluate the potential preventive effect of this mixture on asthma.

Update of adjustable fortification regimen for preterm infants: a new protocol.

Preterm infants fed fortified human milk in standard fashion receive less protein than they need due to customary assumptions. Protein is limiting for growth and neurocognitive development,and shortfalls of protein are not acceptable. Adjustable fortification regimen has been proven as an effective way to provide adequate protein intakes and appropriate growth in this group of infants. Italian Association of Human Milk Banks (AIBLUD) has promoted and implemented this Adjustable fortification regimen in neonatal intensive care units (NICUs) with success. This paper presents an update of Adjustable fortification regimen; a new protocol already utilized in several italian NICUs.

Biological, nutritional and clinical aspects of feeding preterm infants with human milk.

Benefits of breastfeeding are widely recognized, during the last decades human milk has been identified as the normative standard for infant feeding and nutrition. Recent evidence focused on specific bioactive and immunomodulatory factors, such as oligosaccharides, lactose, glycosaminoglycans of human milk and the variability of their concentrations during lactation in both term and preterm milk. Human milk should be fortified with proteins, minerals and vitamins to ensure optimal nutrient intake for preterm VLBWI infants. Best fortification strategies as well as the optimal composition of fortifiers are still object of research. Short and long-term clinical, metabolic, immunologic and neurodevelopmental advantages of breastfeeding ndividualizes fortification - particulary adjustable fortification- has proven to be effective when compared to formula are well documented. Moreover several non-experimental studies observed that clinical feeding tolerance is improved and the attainment of full enteral feeding is quicker by a diet of human milk. In addition, benefits of breastfeeding on psychological and relational aspects have to be considered. Mother’s own milk remains the first choice for all neonates, when it is not available or not sufficient despite significant lactation support, donor milk represents the second best alternative and although some nutritional elements are inactivated by the pasteurization process, it still has documented advantages compared to formula.

Amendment to 2010 Italian guidelines for the establishment and operation of a donor human milk bank.

The present paper is an amendment to the recent Italian Guidelines of human milk banking published in 2010. Working Group on Guidelines (Panel) of the Italian Association of Human Milk Banks (AIBLUD) states, in accordance with the European Union Comission's Amending Directive of January 2011, that the hard plastic feeding bottles used in the collection, storage and pasteurization of the human milk should be Bisphenol A (BPA) free. Until new evidence are available polycarbonate feeding bottles should not be used for collection, storage and pasteurization of human milk. The paper summarizes the former and current European Commission Directives and shows the related amending changes to the 2010 Italian Human Milk Banking Guidelines.

Tolerability of donkey's milk in 92 highly-problematic cow's milk allergic children.

OBJECTIVE: Not exclusively breastfed children with cow's milk allergy (CMA) require a formula or other alternative food, but past and present guidelines differ concerning the best choice. Our aim was to investigate the clinical tolerability, palatability and nutritional adequacy of donkey's milk (DM) in children with proven CMA. It was important to identify a CM replacement for these children, highly problematic from the feeding standpoint, in spite of their age. STUDY DESIGN: A prospective study was conducted on 92 children with CMA, diagnosed through a CM elimination diet, followed by double-blind, placebo-controlled food challenge (DBPCFC) unless contraindicated. Maternal milk was unavailable and current CM substitutes could not be used. Moreover, 89 percent were affected by multiple FA, and subjected to very restricted diets. Within 3 months after the last CM challenge, DBPCFC for DM was performed. CM or DM skin prick test and sIgE determination preceded the CM or DM challenge, respectively. Native electrophoresis and immunoblotting were used to identify CM and DM cross-reactive proteins. Z-scores of weight and length/stature for age were calculated at DM food challenge (T0) and during DM assumption. RESULTS: 83 children (90.2 percent) liked and tolerated DM, at challenge and during follow-up, with increased Z-score for weight and length/stature and improved nutritional parameters. Bovine beta-lactoglobulin was identified as the cross-reacting protein among the DM allergic patients. CONCLUSIONS: DM was found to be a valid alternative foodstuff, in terms of clinical tolerability, palatability and nutritional adequacy, in subjects with CMA who were highly problematic from the feeding standpoint.

Outbreaks of COVID-19 in indoor places of worship: a systematic review.

AIMS: This review aimed to describe what has been published on COVID-19 outbreaks originating from indoor places of worship. METHODS: A systematic review was conducted following the Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) checklist by searching PubMed, Scopus and Embase from 1 January 2020 to 29 March 2021. Citation chasing was also performed. Studies with information about COVID-19 outbreaks originating in indoor places of worship of any religion were included. RESULTS: A total of 9729 records were identified and 36 were selected. The articles reported 119 descriptions of outbreaks linked to churches, mosques, synagogues, and temples, referring to approximately 52-74 unique outbreaks. The outbreaks were mostly located in three major areas: East and Southeast Asia (46%), the USA (27%), Europe (22%). All the outbreaks began in 2020. Mainly, there were no restrictive measures, or such measures were not followed at the time of the outbreak. Choir practices presented the highest attack rate (up to 0.867). CONCLUSIONS: The lack of preventive measures and the role of singing practices were highlighted. Reports were often lacking contact tracing and sometimes did not report the date of outbreak extinction. Moreover, reports came from few geographical areas. Thus, the impact of transmission in places of worship may be largely underestimated.

Targeted and untargeted metabolomic analysis of Procambarus clarkii exposed to a "chemical cocktail" of heavy metals and diclofenac.

Water pollution poses an important problem, but limited information is available about the joined effects of xenobiotics of different chemical groups to evaluate the real biological response. Procambarus clarkii (P. clarkii) has been demonstrated to be a good bioindicator for assessing the quality of aquatic ecosystems. In this work, we studied the bioaccumulation of cadmium (Cd), arsenic (As) and diclofenac (DCF) in different tissues of P. clarkii during 21 days after the exposure to a "chemical cocktail" of As, Cd and DCF, and until 28 days considering a depuration period. In addition, a combined untargeted and targeted metabolomic analysis was carried out to delve the metabolic impairments caused as well as the metabolization of DCF. Our results indicate that As and Cd were mainly accumulated in the hepatopancreas followed by gills and finally abdominal muscle. As and Cd show a general trend to increase the concentration throughout the exposure experience, while a decrease in the concentration of these elements is observed after 7 days of the depuration process. This is also the case in the abdominal muscle for Cd, but not for As and DCF, which increased the concentration in this tissue in the depuration phase. The hepatopancreas showed the greatest number of metabolic pathways affected. Thus, we observed a crucial bioaccumulation of xenobiotics and impairments of metabolites in different tissues. This is the first study combining the exposure to metals and pharmaceutically active compounds in P. clarkii by untargeted metabolomics including the biotransformation of DCF.

Knowledge, attitudes and eating habits red and processed meat among gym users: a cross-sectional survey.

AIMS: In 2015, the International Agency for Research on Cancer (IARC) classified red meat (RM) and processed meat (PM) intakes as 'probably carcinogenic' and 'carcinogenic' to humans, respectively. The aim of the study was to evaluate eating behaviours and knowledge on the potential risks of RM-PM consumption among gym users. METHODS: In 2018, a cross-sectional survey was conducted in 20 gyms in Turin using a 48-item questionnaire assessing sociodemographic, sports, dietary information and knowledge about RM-PM (sample size = 298). Multivariable logistic and linear regressions were performed. The significance level was p ⩽ 0.05. RESULTS: Around 75% of the sample consumed RM and PM at least once a week, with an average of 240.55 ± 435.99 g and 106.50 ± 157.88 g consumed weekly, respectively. Only 7.69% exceeded 700 g of raw RM weekly. Females, those with higher education, those who practise sport outside gyms and those who declared to practise sport to stay healthy, declared to consume less RM. Those who practise sport at a competitive level, those who are on a diet for athletic needs, those with higher body mass index (BMI) and those who consume more eggs and alcohol had a higher RM intake. The association with PM consumption was negative for females and positive for those living without a partner. The likelihood of answering incorrectly to one of the knowledge outcomes was lower for those who had a healthcare-related background and declared to practise sport to stay healthy, while it was higher for participants who stated to have a sport-related background, to be on a diet to lose weight, to read rarely/never the RM-PM nutrition labels and to consume <400 g of fruit and vegetables daily. CONCLUSIONS: Given the relatively low knowledge of the potential risks of RM-PM consumption, it would be advisable to implement campaigns specifically focused on male athletes and people with lower socioeconomic status, in order to raise awareness about this topic.

A novel HPLC column switching method coupled to ICP-MS/QTOF for the first determination of selenoprotein P (SELENOP) in human breast milk.

In this work, we describe for the first time the presence of selenoprotein P in human breast milk. To this end, a novel analytical method has been developed based on a two-dimensional column switching system, which consisted of three size exclusion columns and one affinity column coupled to inductively coupled plasma mass spectrometry (ICP-MS). The method combines the accurate quantification of selenoproteins and selenometabolites by species unspecific isotopic dilution ICP-MS, with unequivocal identification by quadrupole-time-of-flight mass spectrometry. Several selenopeptides, which contain the amino acid selenocysteine (U, SeCys), were identified after tryptic digestion followed by their separation. The results reveal that the relative selenium concentration in colostrum follows the order: glutathione peroxidase (GPX) ≈ selenoprotein P (SELENOP) > selenocystamine (SeCA) > other selenometabolites (SeMB), in contrast with previously published papers (GPX > SeCA > selenocystine > selenomethionine). A mean concentration of 20.1 ± 1.0 ng Se g-1 as SELENOP (1.45 µg SELENOP/g) was determined in colostrum (31% of total selenium).

Optimization of hollow-fiber liquid phase microextraction for polychlorinated biphenyls in human breast milk.

A reliable and sensitive analytical approach has been optimized for the extraction of seven polychlorinated biphenyls (PCBs) from human breast milk. Hollow fiber liquid phase microextraction (HF-LPME) was applied for the first time for the extraction and pre-concentration of the analytes. Analytes were separated by gas chromatography with electron capture detector (GC-µECD) for the sensitive detection and mass spectrometry for the unequivocal identification. A rotable central composite design (RCCD) was performed for the multivariate optimization of the method. The best results were obtained at 40 °C during 30 min and 600 rpm of stirring speed using a hollow fiber length of 5 cm and toluene as an extractant phase and salt addition was not required. The detection limits were in the range 7-14 ng L-1 for PCBs. The coefficients of determination of the calibration curves indicated good linearity (R2> 0.96) and the enrichment factors ranged from 74 to 143. This type of study is of great importance due to the deleterious effect that the presence of contaminants can produce in infants health related to the immature character of the defense system. Moreover, exclusive breastfeeding is recommended by neonatologists up to six months of life and as complementary food during the first two years.

A specific mixture of short-chain galacto-oligosaccharides and long-chain fructo-oligosaccharides induces a beneficial immunoglobulin profile in infants at high risk for allergy.

BACKGROUND: It has been suggested that human breast milk oligosaccharides play a role in the development of the immune system in infants, and may consequently inhibit the onset of allergy. A specific prebiotic mixture of short-chain galacto-oligosaccharides and long-chain fructo-oligosaccharides (GOS/FOS) has been shown to reduce the incidence of atopic dermatitis (AD) at 6 months of age in infants at risk for allergy. AIM OF THE STUDY: This study was aimed to analyze the effect of GOS/FOS on the immune response in these infants. METHODS: In a double-blind randomized placebo-controlled study, infants received a hypoallergenic whey formula with either 8 g/l GOS/FOS in a 9 : 1 ratio (IMMUNOFORTIS) or 8 g/l maltodextrine (placebo) for 6 months. At 3 months of age, children were vaccinated with Hexavac against a.o. diphteria, tetanus, polio (DTP). At 6 months of age, plasma samples were collected from 84 infants (verum group n = 41, placebo group n = 43). Levels of total immunoglobulins (Ig) and of cow's milk protein (CMP-) and DTP-specific Ig were measured. RESULTS: GOS/FOS supplementation led to a significant reduction in the plasma level of total IgE, IgG1, IgG2 and IgG3, whereas no effect on IgG4 was observed. CMP-specific IgG1 was significantly decreased. DTP-specific Ig levels were not affected. CONCLUSIONS: This study shows that GOS/FOS supplementation induces a beneficial antibody profile. GOS/FOS reduces the total Ig response and modulates the immune response towards CMP, while leaving the response to vaccination intact. This suggests that oral GOS/FOS supplementation is a safe method to restrain the atopic march.