Juan Cristóbal Gana

Prof. Dr. Juan Cristóbal Gana

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Research Focus & Metrics

Academic Career Length

17Years (2010-Present)

(Calculated once Scilit publication data is synced: current year − year of first publication + 1)

Representative Publications

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1 December 2011 in Gastroenterology
Verified
Journal Article
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JGJuan Cristóbal Gana
Juan Cristóbal Gana
DTDan Turner
Dan Turner
GMGiorgina Mieli–Vergani
Giorgina Mieli–Vergani
MDMark Davenport
Mark Davenport
TMTamir Miloh
Tamir Miloh
SLSimon C. Ling
Simon C. Ling

1 February 2010 in Journal of Pediatric Gastroenterology and Nutrition
Verified
Journal Article
Closed access
JGJuan Cristóbal Gana
Juan Cristóbal Gana
DTDan Turner
Dan Turner
EREve A Roberts
Eve A Roberts
SLSimon C Ling
Simon C Ling

18 November 2023 in Nutrients
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Journal Article
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CCCamila Farías Castro
Camila Farías Castro
CCCamila Cisternas
Camila Cisternas
JGJuan Cristóbal Gana
Juan Cristóbal Gana
GAGigliola Alberti
Gigliola Alberti
Francisca EcheverríaFrancisca Echeverría
Francisca Echeverría
Rodrigo ValenzuelaRodrigo Valenzuela
Rodrigo Valenzuela
Nonalcoholic fatty liver disease (NAFLD) is pediatrics’ most common chronic liver disease. The incidence is high in children and adolescents with obesity, which is associated with an increased risk of disease progression. Currently, there is no effective drug therapy in pediatrics; therefore, lifestyle interventions remain the first line of treatment. This review aims to present an updated compilation of the scientific evidence for treating this pathology, including lifestyle modifications, such as exercise and dietary changes, highlighting specific nutritional strategies. The bibliographic review was carried out in different databases, including studies within the pediatric population where dietary and/or nutritional interventions were used to treat NAFLD. Main interventions include diets low in carbohydrates, free sugars, fructose, and lipids, in addition to healthy eating patterns and possible nutritional interventions with n-3 polyunsaturated fatty acids (EPA and DHA), amino acids (cysteine, L-carnitine), cysteamine, vitamins, and probiotics (one strain or multi-strain). Lifestyle changes remain the main recommendation for children with NAFLD. Nevertheless, more studies are required to elucidate the effectiveness of specific nutrients and bioactive compounds in this population.

17 November 2020 in Nutrients
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GAGigliola Alberti
Gigliola Alberti
JGJuan Cristóbal Gana
Juan Cristóbal Gana
JSJosé L. Santos
José L. Santos
Non-alcoholic fatty liver disease (NAFLD) is currently the most common form of liver disease in both adults and children, becoming the leading cause for liver transplant in many countries. Its prevalence has increased considerably in recent years, mainly due to the explosive increase in pediatric obesity rates. NAFLD is strongly associated with central obesity, diabetes, dyslipidemia and insulin resistance, and it has been considered as the hepatic manifestation of the metabolic syndrome. Its complex pathophysiology involves a series of metabolic, inflammatory and oxidative stress processes, among others. Given the sharp increase in the prevalence of NAFLD and the lack of an appropriate pharmacological approach, it is crucial to consider the prevention/management of the disease based on lifestyle modifications such as the adoption of a healthy nutrition pattern. Herein, we review the literature and discuss the role of three key nutrients involved in pediatric NAFLD: fructose and its participation in metabolism, Omega-3 fatty acids and its anti-inflammatory effects and vitamin E and its action on oxidative stress.

1 November 2020 in Pediatrics
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EMElizabeth Munoz-Osores
Elizabeth Munoz-Osores
IMIsabel Maldonado-Campos
Isabel Maldonado-Campos
MOMaria T. Olivares-Labbe
Maria T. Olivares-Labbe
LVLuis Villarroel
Luis Villarroel
JGJuan Cristóbal Gana
Juan Cristóbal Gana
CONTEXT: Treatment of eosinophilic esophagitis (EoE) is focused on dietary, pharmacologic, and endoscopic therapy options. Within the pharmacologic alternatives, topical corticosteroids are the most used, and a large number of studies evaluating their effectiveness have been published, requiring a new summary of evidence. OBJECTIVE: To evaluate the histologic and clinical effectiveness of the use of corticosteroids in pediatric patients with a diagnosis of EoE. DATA SOURCES: Cochrane Central Register of Controlled Trials, Medline, Embase, Science Citation Index Expanded, Conference Proceedings Citation Index-Science, Latin American and Caribbean Health Sciences Literature, and ClinicalTrials.gov (June 2019). STUDY SELECTION: We selected randomized controlled trials assessing corticosteroids versus a placebo or dietary treatment of EoE in children. DATA EXTRACTION: Methodologic quality of evidence was evaluated by using the Cochrane Collaboration’s risk of bias tool and the Grading of Recommendations Assessment, Development, and Evaluation system. The primary outcomes were clinical and histologic improvement. RESULTS: A total of 1655 studies were identified. Five studies were included (206 patients). Histologic response was 49.25% in the corticosteroids group and 4.16% in the placebo group (risk ratio 11.05 [confidence interval 3.8–32.15]; P < .0001). Symptomatic response was 33.6% in the corticosteroids group and 21.8% in the control group (risk ratio 1.62 [confidence interval 0.94–2.79]; P = .08). There were no major adverse effects. LIMITATIONS: Heterogeneity of the diagnosis of EoE. CONCLUSIONS: Our review revealed favorable results of corticosteroids versus placebo, mainly in histologic response. More studies are needed, by using validated clinical scores, to obtain more reliable results.

17 March 2021 in Endoscopy International Open
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CBConstanza Bay
Constanza Bay
RHRomina Henriquez
Romina Henriquez
LVLuis Villarroel
Luis Villarroel
JGJuan Cristóbal Gana
Juan Cristóbal Gana
Background and study aims The primary objective was to measure the effect of music as an adjunct to sedation in patient anxiety levels during pediatric endoscopic examinations. Patients and methods We performed a single-blind randomized controlled trial comparing music with no music in children aged 2 to 18 years. Anxiety was measured using the Modified Yale Preoperative Anxiety Scale (m-YPAS) and the Visual Analog Anxiety Scale (VAS-anxiety). Patient perception of pain was evaluated with the Wong-Baker Faces Pain Rating Scale (WBFPRS). Patient experience, family satisfaction, and endoscopist perception of difficulty were evaluated. Sedative doses were recorded. Results A total of 51 children were randomized to the experimental group and 49 children to the control group. The mean ages were 10.5 years and 12.3 years, respectively. There were 63 % female subjects with no differences between groups. Overall, there were 85 upper endoscopies and 15 colonoscopies. In the recovery unit, the experimental group had lower average m-YPAS scores (mean score 27.7 vs 34.7; P < 0.001), a higher proportion of them had low m-YPAS scores (80 % vs 49 % P < 0.001), had lower VAS-anxiety scores [mean score 0.55 vs 1.57 (P = 0.003)], and had lower WBFPRS scores [mean score 2.7 vs 1.3 (P = 0.001)]. There were no statistically significant differences found in the amount of standard sedation given to the groups, nor in additional sedation administered. In the experimental group, the patient-reported experience was significantly better. Conclusions The study results show that music reduces anxiety and pain associated with endoscopic procedures in children. It also facilitates these procedures and improves patient satisfaction.