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1.
Cureus ; 16(1): e52080, 2024 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-38213941

RESUMO

Probiotics and prebiotics are important in preventing different diseases such as irritable bowel syndrome (IBS), which is a functional bowel disorder characterized by changes in bowel habits. Considering the limited studies on this topic, the present study was conducted to assess both gastroenterologist (GI) physicians' and dietitians' practices in recommending probiotics and prebiotics for IBS patients, as well as to measure their professional educational history on probiotics and prebiotics. A descriptive cross-sectional study was performed to investigate the knowledge, use, and perceptions of probiotics and prebiotics of GI physicians and dietitians at governmental hospitals in Jeddah, Saudi Arabia. A validated questionnaire was sent to 42 participants of both genders selected randomly, who were all qualified healthcare practitioners. The majority of GI physicians demonstrated high levels of knowledge about the health benefits of probiotics and prebiotics (76.2%). In contrast, most dietitians had lower levels of knowledge (52.4%), representing a significant difference between both groups (p<0.01). 83.3% of GI physicians believed that the use of probiotics and prebiotics was required for IBS patients, as compared with 50.0% of dietitians. In conclusion, GI physicians were shown to be more knowledgeable and believed more in the benefits of using probiotics and prebiotics in IBS patients than dietitians, but most participants were not aware of the probiotic products that are available in pharmacies in Saudi Arabia.

2.
Biomedicines ; 11(12)2023 Dec 07.
Artigo em Inglês | MEDLINE | ID: mdl-38137464

RESUMO

(1) Introduction: given the high prevalence of metabolic syndrome (MetS) in Saudi Arabia, especially in Jeddah, this study aims to understand the dietary and lifestyle-related risk factors among Jeddah's non-diabetic adults. (2) Material and Methods: Employing a cross-sectional design, non-diabetic adults were sourced from public healthcare centers. Demographics, lifestyle, and dietary habits were surveyed. Blood pressure, anthropometrics, and fasting blood samples measuring plasma glucose, serum triglycerides, and HDL cholesterol were collected. The age cut-off for MetS was ascertained using the receiver operating characteristic curve. Variables influencing MetS were evaluated using univariate logistic regression, and consequential factors underwent multivariate analysis, adjusted for age and sex. (3) Results: Among 1339 participants, 16% had MetS, with age being the strongest predictor (p < 0.001). The optimal age cut-off was 32 years. For those <32, elevated BP in men and waist circumference (WC) in women were most prevalent. For those >32, elevated WC was dominant in both sexes. Univariate logistic regression revealed that higher income and education correlated with lower MetS prevalence, while marriage and smoking were risk factors. Adjusting for age and sex, only very high income had a significant low-risk association (p = 0.034). (4) Conclusion: MetS is notable in the studied group, with age as the pivotal predictor. High income reduces MetS risk, while marital status and smoking could increase it. Since this was a cross-sectional study, cohort studies are needed to validate our findings.

3.
Cureus ; 15(12): e50812, 2023 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-38125695

RESUMO

Cow's milk protein allergies (CMPAs) particularly occur in infancy and early childhood due to an immunological allergic reaction to milk proteins. This issue is increasing in Saudi Arabia and requires research to improve health status and provide alternatives. Our study aims to investigate the important aspects of immunoglobulin E (IgE) and IgG CMPA in Saudi Arabia regarding its prevalence and association with demographic and health-related factors in both adult and pediatric populations. A descriptive retrospective cross-sectional study was conducted on 376 patients, comprising 314 adults aged between 19 and 86 years, and 62 pediatric patients aged between one and 12 years. The study focused on individuals who attended a private medical center in Jeddah city over the past five years. Laboratory results for food allergy of IgE and IgG tests, including cow's milk proteins (CMPs), serum 25-hydroxyvitamin D (25OHD), specific IgE inhalant allergy results, and other health-related factors were collected from an electronic record system. Results have shown that casein was the most common sensitizing allergen of CMPs in adults, whereas α-lactalbumin was the most common sensitizing allergen in pediatrics. The most frequent sensitizing allergen in IgG CMP was cow's milk in 54/92 (58.7%) adults, followed by cow's sour milk products 41 (44.6%). Cow's milk was the most common sensitizing allergen in 20/20 (100%) children. The rate of CMPA was significantly higher in children younger than five years old (P =0.003), while children who interacted with pets had a marginal significantly reduced rate (P = 0.054). Thus, cow's milk is the most sensitizing allergen in IgG CMPs in adults and pediatrics.

4.
Cureus ; 15(9): e45055, 2023 Sep.
Artigo em Inglês | MEDLINE | ID: mdl-37829969

RESUMO

BACKGROUND: Laxatives are over-the-counter medications used as a treatment for constipation. The lipid-lowering effect of the long-term use of laxatives has been proposed. AIM: To investigate the possible impact of the chronic use of laxatives on serum lipid profile, body mass index (BMI), and hemoglobin A1c (HbA1c). METHODS: An observational retrospective cohort study was conducted to analyze data related to patients who received laxatives for six or 12 months or more in the KAUH database system. BMI, weight, cholesterol, triglycerides, low-density lipoprotein (LDL), high-density lipoprotein (HDL), aspartate aminotransferase (AST), alanine aminotransferase (ALT), and HbA1c data were collected retrospectively from hospital records for three time points: baseline, six months, and 12 months of laxative treatment from the starting date for each patient. RESULTS: A total of 106 patients' records fulfilled the inclusion criteria, 46 (43%) males with a mean age of 66 and 60 (57%) females with a mean age of 63. A significant decrease in plasma cholesterol and low-density lipoprotein-cholesterol (LDL-C) levels was observed in those who used laxatives for 12 months. Furthermore, an overall BMI and ALT reduction was seen in the combined. On the other hand, HbA1c levels appeared to improve in the combined group but not statistically significant. The change in the cholesterol level could be observed in patients receiving statin treatment and those without, with no statistical significance between the two groups. CONCLUSION: Chronic laxative use for 12 months or more is associated with a decreased total and LDL-C level with no significant effect on high-density lipoprotein-cholesterol (HDL-C) levels. Additionally, there was a significant reduction in BMI and ALT. This effect is more prominent with combined therapy. Further multicentric studies on larger sample sizes are recommended to confirm our findings.

5.
Diseases ; 11(1)2023 Mar 14.
Artigo em Inglês | MEDLINE | ID: mdl-36975599

RESUMO

(1) Background: Type 2 diabetes (T2DM) is a chronic metabolic disease with serious health complications. T2DM is associated with many chronic illnesses, including kidney failure, cardiovascular diseases (CVD), vision loss, and other related diseases. Obesity is one of the major factors associated with insulin resistance and dyslipidemia. Recently, the development of GLP-1 Receptor agonist (GLP-1RA) showed great therapeutic potential for T2DM. Aim: To retrospectively investigate the association of the long-term use of GLP-1RA therapy in T2DM patients with HbA1c levels and dyslipidemia. (2) Methods: Retrospective data collection and analysis of demographic, clinical records, and biochemical parameters were carried out for 72 T2DM taking GLP-1RA treatments for six months. (3) Results: A total of 72 T2DM patients with a mean age = 55 (28 male and 44 female) were divided into two groups. Group 1 received statins (n = 63), and group 2 did not receive statins (n = 9). The GLP-1RA effect on BMI was significantly decreased in group 1 (p < 0.01). A significant effect was observed for HbA1c in both groups for six months of treatment duration (p < 0.05). The AST levels significantly decreased in group 2 from 25.2 to 19.4 U\L (p = 0.011). (4) Conclusions: GLP-1RA treatments were associated with weight reduction and improved glycemic control for T2DM patients. Moreover, it is suggested that it has anti-inflammatory and hepatoprotective effects. However, no direct association was found with the lipid profile in all groups of T2DM.

6.
Diseases ; 11(1)2023 Jan 15.
Artigo em Inglês | MEDLINE | ID: mdl-36648875

RESUMO

Nonalcoholic fatty liver disease (NAFLD) is common among Saudi patients with type 2 diabetes (T2DM). However, recommended clinical procedures to detect it are unavailable in many locations. Therefore, better and more available diagnostic biomarkers for NAFLD are needed. Various serum parameters were suggested, and algorithms that employ routine measurements in clinical practice have been developed for the prediction of fat stores in the liver in different populations. However, no such studies have been conducted on Saudis. We aimed to compare selected biochemical markers and calculated indices in T2DM patients diagnosed with NAFLD and patients without NAFLD to find the best markers associated with NAFLD. A cross-sectional study was employed to recruit 67 people with T2DM from endocrine outpatient clinics at King Abdul-Aziz University Hospital. NAFLD was detected by ultrasonography in 28 patients. Demographic information, anthropometric, and blood pressure (BP) measurements were taken. Fasting blood samples were obtained to measure glucose, glycated haemoglobin, lipid profile, liver function tests, and highly sensitive C-reactive protein. Fatty liver index, hepatic steatosis index, NAFLD-liver fat score, and triglyceride and glucose index were calculated. Following stepwise forward likelihood ratio regression with independent variables included in one model using binary logistic regression with age and waist circumference (WC) entered as covariates, elevated diastolic BP and low high-density lipoprotein- cholesterol remained significantly associated with NAFLD (p = 0.002 and 0.03, respectively). However, none of the investigated indices could be used to diagnose the disease adequately due to low specificity, even after calculating new cut-off values. Investigating novel markers and adjusting existing equations used to calculate indices to improve sensitivity and specificity in our population is needed.

7.
Cureus ; 15(12): e50524, 2023 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-38222178

RESUMO

Background Non-alcoholic fatty liver disease (NAFLD) is more prevalent among individuals with type 2 diabetes (T2DM), elevating their risk of cardiovascular diseases (CVDs) and premature mortality. There is a need to modify treatment strategies to prevent or delay these adverse outcomes. Currently, there are no sensitive or specific biomarkers for predicting NAFLD in Saudi T2DM patients. Therefore, we aimed to explore the possibility of using fibroblast growth factor 21 (FGF-21), free fatty acids (FFAs), homeostatic model assessment for insulin resistance (HOMA-IR), and quantitative insulin sensitivity check index (QUICKI) as possible markers. Methodology In this study, a total of 67 T2DM patients were recruited. NAFLD was detected by ultrasonography in 28 patients. Plasma glucose, FFAs, FGF-21, and serum insulin were measured in fasting blood samples. HOMA-IR and QUICKI were calculated. The means of the two groups with and without NAFLD were statistically compared. The receiver operating characteristics (ROC) curve and the area under the curve (AUC) were used to assess the ability to identify NAFLD. Results The mean levels of FGF-21 and HOMA-IR were significantly higher and that of QUICKI was significantly lower in patients with NAFLD than in those without (p < 0.001, p = 0.023, and p = 0.018, respectively). FGF-21 had the highest AUC to identify NAFLD (AUC = 0.981, 95% confidence interval = 0.954-1, P < 0.001). The AUCs for HOMA-IR, QUICKI, and FFA were <0.7. The highest sensitivity, specificity, positive likelihood ratio, and the lowest negative likelihood ratio were found when FGF-21 was used to predict NAFLD. Conclusions FGF-21 may be used as a biomarker to predict NAFLD in people with T2DM due to its high sensitivity and specificity compared to the other markers.

8.
Genes (Basel) ; 13(12)2022 12 02.
Artigo em Inglês | MEDLINE | ID: mdl-36553543

RESUMO

Studies suggest that ATP-binding cassette transporter A1 (ABCA1 C69T) polymorphism is associated with a decreased incidence of type 2 diabetes mellitus (T2DM) and that there is an association between ABCA1 C69T polymorphism and the risk of dyslipidemia in diabetic individuals. However, other studies contradict these suggestions. Therefore, we aimed to investigate the prevalence of ABCA1 C69T (rs1800977) gene polymorphism in a representative sample of the Saudi population not previously diagnosed with diabetes and its possible association with dyslipidemia and dysglycemia. A cross-sectional design was used to recruit nondiabetic adults of both genders from the Saudi population in Jeddah by employing a stratified, two-stage cluster sampling method. A total of 650 people (337 men and 313 women) were recruited. Demographic, dietary, and lifestyle variables, as well as medical history and family history of chronic diseases, were collected using a predesigned questionnaire. Fasting blood samples were taken for the determination of fasting plasma glucose (FPG), glycated hemoglobin (HbA1c), and lipids profile, which were followed by a 1-h oral glucose tolerance test (OGTT). Real-time PCR technology was used to determine the ABCA1 C69T gene SNP (rs1800977). The T allele of ABCA1 C69T (rs1800977) was very frequent (TT in 44.9% and CT in 43.7%). There was a trend toward significance for a higher dysglycemia percentage in people with CT and TT genotypes (25.7%, and 23.3%, respectively) compared with CC genotypes (16.2%). In addition, FPG and 1-h plasma glucose were significantly higher in people with both TT and CT genotypes compared to CC genotypes. However, T allele was not associated with any dysregulation of lipid parameters.


Assuntos
Diabetes Mellitus Tipo 2 , Estado Pré-Diabético , Humanos , Adulto , Feminino , Masculino , Diabetes Mellitus Tipo 2/genética , Estado Pré-Diabético/genética , Arábia Saudita/epidemiologia , Glicemia , Estudos Transversais , Polimorfismo Genético , Transportador 1 de Cassete de Ligação de ATP/genética
9.
J Endocr Soc ; 6(6): bvac055, 2022 Jun 01.
Artigo em Inglês | MEDLINE | ID: mdl-35592514

RESUMO

Context: Waist circumference (WC) is used in screening for metabolic syndrome (MetS) based on its association with cardiometabolic risk. This might apply differently in ethnically different populations. Associations with other measures are also unclear. Objective: This work aimed to investigate the association between neck circumference (NC), WC, WC:hip circumference, WC:height (WC:Ht), NC:Ht, fat percentage, body mass index (BMI), conicity index, abdominal volume index, and weight-adjusted waist index with nonanthropometric components of MetS in nondiabetic Saudi adults. Methods: This cross-sectional study took place in public health centers in Jeddah, comprising 1365 Saudi adults (772 men and 593 women) aged 18 years or older not previously diagnosed with diabetes. Main outcome measures included: the presence of 2 or more nonanthropometric components of the MetS were used to define clinical metabolic abnormality (CMA). The predictive ability of studied anthropometric indices for CMA was determined using the area under receiver operating characteristics (AUC) curve and binary logistic regression. Results: A total of 157 men and 83 women had CMA. NC and NC:Ht had the highest predictive ability for CMA in men (odds ratio [OR]NC = 1.79, P < .001 and ORNC:Ht = 1.68, P < .001; AUCNC = 0.69 [95% CI, 0.64-0.74] and AUCNC:Ht = 0.69 [95% CI, 0.64-0.73]). In women, WC had the highest predictive ability ORWC = 1.81, P < .001; AUCWC = 0.75 [95% CI, 0.69-0.80]). Conclusion: Upper-body anthropometric indicators that were associated with subcutaneous fat had the highest predictive ability for CMA in men whereas abdominal obesity indictors had the best predictive ability in women, suggesting that fat distribution might contribute to CMA in a sex-specific manner.

10.
Artigo em Inglês | MEDLINE | ID: mdl-34769893

RESUMO

The association between lifestyle practices, obesity and increased BP are under-investigated. We aimed to investigate this association to identify the factors associated with hypertension and prehypertension in Saudis. Non-diabetic adults were recruited from public healthcare centers using a cross-sectional design. Recruits were interviewed using a predesigned questionnaire. Weight, height, waist circumference (WC), hip circumference (HC), neck circumference (NC) and BP were measured. The variables were analyzed by comparing the prehypertensive and hypertensive groups with the normotensive group. A total of 1334 adults were included. The study found that 47.2% of men and 24.7% of women were prehypertensive, and 15.1% of men and 14.4% of women were hypertensive. High BMI, WC, NC, and WC: HC ratios were associated with an increased risk of prehypertension and hypertension in men and women. Low physical activity was associated with an increased risk of elevated BP in men, while sleep duration of ≤6 h and sitting for ≥4 h were associated with increased risk in women. Women from central Asia, southeast Asia, and those of mixed origin had a higher prevalence of hypertension compared to those from Arabian tribes. In conclusion, prehypertension and hypertension increase with age and obesity. Gender differences were apparent in the association between several lifestyle practices and prehypertension or hypertension among various ethnic/racial groups.


Assuntos
Hipertensão , Pré-Hipertensão , Adulto , Pressão Sanguínea , Índice de Massa Corporal , Estudos Transversais , Feminino , Humanos , Hipertensão/epidemiologia , Masculino , Pré-Hipertensão/epidemiologia , Prevalência , Fatores de Risco , Arábia Saudita/epidemiologia , Fatores Sexuais , Circunferência da Cintura
11.
Nutr Metab Insights ; 13: 1178638820965258, 2020.
Artigo em Inglês | MEDLINE | ID: mdl-33116569

RESUMO

OBJECTIVE: Study the association of dietary habits and other indicators of lifestyle with dysglycemia in Saudi adults. METHODS: In a cross-sectional design, data were obtained from 1403 Saudi adults (⩾20 years), not previously diagnosed with diabetes. Demographics, lifestyle variables and dietary habits were obtained using a predesigned questionnaire. Fasting plasma glucose, glycated hemoglobin and 1-hour oral glucose tolerance test were used to identify dysglycemia. Regression analysis was performed to determine the associations of dietary factors and other indicators of lifestyle with dysglycemia. RESULTS: A total 1075 adults (596 men, and 479 women) had normoglycemia, and 328 (195 men, and 133 women) had dysglycemia. Following adjustment for age, BMI and waist circumference, in men the weekly intake of 5 portions or more of red meat and Turkish coffee were associated with decreased odds of having dysglycemia odds ratio (OR) 0.444 (95% CI: 0.223, 0.881; P = .02) and 0.387 (95% CI: 0.202, 0.74; P = .004), respectively. In women, the intake of fresh juice 1 to 4 portions per week and 5 portions or more were associated with OR 0.603 (95% CI: 0.369, 0.985; P = .043) and OR 0.511 (95% CI: 0.279, 0.935; P = .029) decreased odds of having dysglycemia, respectively compared with women who did not drink fresh juice. The intake of 5 times or more per week of hibiscus drink was associated with increased odds of having dysglycemia, OR 5.551 (95% CI: 1.576, 19.55, P = .008) compared with women not using such a drink. Other lifestyle factors were not associated with dysglycemia. CONCLUSION: Dietary practices by studied Saudis have some impact on risk of dysglycemia, with obvious sex differences.

12.
Nutrients ; 12(8)2020 Aug 13.
Artigo em Inglês | MEDLINE | ID: mdl-32823801

RESUMO

Diet and other lifestyle habits have been reported to contribute to the development of dyslipidemia in various populations. Therefore, this study investigated the association between dyslipidemia and dietary and other lifestyle practices among Saudi adults. Data were collected from adults (≥20 years) not previously diagnosed with diabetes in a cross-sectional design. Demographic, anthropometric, and clinical characteristics, as well as lifestyle and dietary habits were recorded using a predesigned questionnaire. Fasting blood samples were drawn to estimate the serum lipid profile. Out of 1385 people, 858 (62%) (491 men, 367 women) had dyslipidemia. After regression analysis to adjust for age, body mass index, and waist circumference, an intake of ≥5 cups/week of Turkish coffee, or carbonated drinks was associated with increased risk of dyslipidemia in men (OR (95% CI), 2.74 (1.53, 4.89) p = 0.001, and 1.53 (1.04, 2.26) p = 0.03 respectively), while the same intake of American coffee had a protective effect (0.53 (0.30, 0.92) p = 0.025). Sleep duration <6 h, and smoking were also associated with increased risk in men (1.573 (1.14, 2.18) p = 0.006, and 1.41 (1.00, 1.99) p = 0.043 respectively). In women, an increased intake of fresh vegetables was associated with increased risk (2.07 (1.09, 3.94) p = 0.026), which could be attributed to added salad dressing. Thus, there are sex differences in response to dietary and lifestyle practices.


Assuntos
Dieta/estatística & dados numéricos , Dislipidemias/epidemiologia , Comportamento Alimentar , Estilo de Vida , Fatores Sexuais , Adulto , Estudos Transversais , Dieta/efeitos adversos , Inquéritos sobre Dietas , Dislipidemias/etiologia , Jejum/sangue , Feminino , Humanos , Lipídeos/sangue , Masculino , Pessoa de Meia-Idade , Atenção Primária à Saúde , Análise de Regressão , Fatores de Risco , Arábia Saudita/epidemiologia , Inquéritos e Questionários , Adulto Jovem
13.
Clin Nutr ; 37(2): 443-451, 2018 04.
Artigo em Inglês | MEDLINE | ID: mdl-28215759

RESUMO

BACKGROUND & AIMS: Ageing increases risk of respiratory infections and impairs the response to influenza vaccination. Pre- and pro-biotics offer an opportunity to modulate anti-viral defenses and the response to vaccination via alteration of the gut microbiota. This study investigated the effect of a novel probiotic, Bifidobacterium longum bv. infantis CCUG 52486, combined with a prebiotic, gluco-oligosaccharide, on the B and T cell response to seasonal influenza vaccination in young and older subjects . METHODS: In a double-blind, randomized controlled trial, 58 young (18-35 y) and 54 older (60-85 y) subjects were supplemented with the synbiotic for 8 weeks. At 4 weeks they were administered with a seasonal influenza vaccine. B and T cell phenotype and responsiveness to in vitro re-stimulation with the vaccine were assessed at baseline, 4, 6 and 8 weeks. RESULTS: B and T cell profiles differed markedly between young and older subjects. Vaccination increased numbers of memory, IgA+ memory, IgG+ memory and total IgG+ B cells in young subjects, but failed to do so in older subjects and did not significantly alter T cell subsets. Seroconversion to the H1N1 subunit in the older subjects was associated with higher post-vaccination numbers of plasma B cells, but seroconversion was less consistently associated with T cell phenotype. B and T cell subsets from both young and older subjects demonstrated a strong antigen-specific recall challenge, and although not influenced by age, responsiveness to the recall challenge was associated with seroconversion. In older subjects, CMV seropositivity was associated with a significantly lower recall response to the vaccine, but the synbiotic did not affect the responsiveness of B or T cells to re-stimulation with influenza vaccine. CONCLUSIONS: Antigen-specific B and T cell activation following an in vitro recall challenge with the influenza vaccine was influenced by CMV seropositivity, but not by a synbiotic. Registered under ClinicalTrials.gov Identifier no. NCT01066377.


Assuntos
Envelhecimento/imunologia , Bifidobacterium longum/imunologia , Vacinas contra Influenza/imunologia , Influenza Humana/prevenção & controle , Oligossacarídeos/uso terapêutico , Simbióticos/administração & dosagem , Adolescente , Adulto , Fatores Etários , Idoso , Idoso de 80 Anos ou mais , Formação de Anticorpos/efeitos dos fármacos , Formação de Anticorpos/imunologia , Linfócitos B/efeitos dos fármacos , Linfócitos B/imunologia , Método Duplo-Cego , Feminino , Glucose , Humanos , Imunidade Celular/efeitos dos fármacos , Imunidade Celular/imunologia , Vacinas contra Influenza/uso terapêutico , Influenza Humana/imunologia , Masculino , Pessoa de Meia-Idade , Oligossacarídeos/imunologia , Prebióticos , Estações do Ano , Linfócitos T/efeitos dos fármacos , Linfócitos T/imunologia , Adulto Jovem
14.
Immun Ageing ; 13: 6, 2016.
Artigo em Inglês | MEDLINE | ID: mdl-26985232

RESUMO

BACKGROUND: Ageing increases risk of respiratory infections and impairs the response to influenza vaccination. Pre- and probiotics offer an opportunity to modulate anti-viral defenses and the response to vaccination via alteration of the gut microbiota. This study investigated the effect of a novel probiotic, Bifidobacterium longum bv. infantis CCUG 52,486, combined with a prebiotic, gluco-oligosaccharide (B. longum + Gl-OS), on the response to seasonal influenza vaccination in young and older subjects in a double-blind, randomized controlled trial, taking into account the influence of immunosenescence markers at baseline. RESULTS: Vaccination resulted in a significant increase in total antibody titres, vaccine-specific IgA, IgM and IgG and seroprotection to all three subunits of the vaccine in both young and older subjects, and in general, the increases in young subjects were greater. There was little effect of the synbiotic, although it tended to reduce seroconversion to the Brisbane subunit of the vaccine and the vaccine-specific IgG response in older subjects. Immunological characterization revealed that older subjects randomized to the synbiotic had a significantly higher number of senescent (CD28(-)CD57(+)) helper T cells at baseline compared with those randomized to the placebo, and they also had significantly higher plasma levels of anti-CMV IgG and a greater tendency for CMV seropositivity. Moreover, higher numbers of CD28(-)CD57(+) helper T cells were associated with failure to seroconvert to Brisbane, strongly suggesting that the subjects randomized to the synbiotic were already at a significant disadvantage in terms of likely ability to respond to the vaccine compared with those randomized to the placebo. CONCLUSIONS: Ageing was associated with marked impairment of the antibody response to influenza vaccination in older subjects and the synbiotic failed to reverse this impairment. However, the older subjects randomized to the synbiotic were at a significant disadvantage due to a greater degree of immunosenscence at baseline compared with those randomized to the placebo. Thus, baseline differences in immunosenescence between the randomized groups are likely to have influenced the outcome of the intervention, highlighting the need for detailed immunological characterization of subjects prior to interventions. TRIAL REGISTRATION: Clinicaltrials.gov NCT01066377.

15.
J Nutr Sci ; 3: e46, 2014.
Artigo em Inglês | MEDLINE | ID: mdl-26101614

RESUMO

The fruit of the date palm (Phoenix dactylifera L.) is a rich source of dietary fibre and polyphenols. We have investigated gut bacterial changes induced by the whole date fruit extract (digested date extract; DDE) and its polyphenol-rich extract (date polyphenol extract; DPE) using faecal, pH-controlled, mixed batch cultures mimicking the distal part of the human large intestine, and utilising an array of microbial group-specific 16S rRNA oligonucleotide probes. Fluorescence microscopic enumeration indicated that there was a significant increase in the growth of bifidobacteria in response to both treatments, whilst whole dates also increased bacteroides at 24 h and the total bacterial counts at later fermentation time points when compared with DPE alone. Bacterial metabolism of whole date fruit led to the production of SCFA, with acetate significantly increasing following bacterial incubation with DDE. In addition, the production of flavonoid aglycones (myricetin, luteolin, quercetin and apigenin) and the anthocyanidin petunidin in less than 1 h was also observed. Lastly, the potential of DDE, DPE and metabolites to inhibit Caco-2 cell growth was investigated, indicating that both were capable of potentially acting as antiproliferative agents in vitro, following a 48 h exposure. This potential to inhibit growth was reduced following fermentation. Together these data suggest that consumption of date fruits may enhance colon health by increasing beneficial bacterial growth and inhibiting the proliferation of colon cancer cells. This is an early suggestion that date intake by humans may aid in the maintenance of bowel health and even the reduction of colorectal cancer development.

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