1.In Vitro and In Vivo Validation of EP2-Receptor Agonism to Selectively Achieve Inhibition of Mast Cell Activity
Judith PLAZA ; Rosa TORRES ; Adrián URBANO ; César PICADO ; Fernando de MORA
Allergy, Asthma & Immunology Research 2020;12(4):712-728
Purpose:
Agonism of the prostaglandin E2 receptor, E-prostanoid receptor 2 (EP2), may represent an alternative protective mechanism in mast cell (MC)-mediated diseases. Previous studies have suggested that activation of the MC EP2 receptor prevents pathological changes in the murine models of allergic asthma. This work aimed to analytically validate the EP2 receptor on MCs as a therapeutic target.
Methods:
Murine MC lines and primary cultures, and MCs bearing the human immunoglobulin E (IgE) receptor were subjected to IgE-mediated activation subsequent to incubation with selective EP2 agonists. Two molecularly unrelated agonists, butaprost and CP-533536, were tested either in vitro or in 2 in vivo models of allergy.
Results:
The diverse range of MC populations was consistently inhibited through selective EP2 agonism in spite of exhibiting a heterogeneous phenotype. Such inhibition occurred in both mouse and human IgE (hIgE)-mediated activation. The use of molecularly unrelated selective EP2 agonists allowed for the confirmation of the specificity of this protective mechanism. This effect was further demonstrated in 2 in vivo murine models of allergy where MCs are a key to pathological changes: cutaneous anaphylaxis in a transgenic mouse model expressing the hIgE receptor and aeroallergen-induced murine model of asthma.
Conclusions
Selective EP2 agonism is a powerful pharmacological strategy to prevent MCs from being activated through IgE-mediated mechanisms and from causing deleterious effects. The MC EP2 receptor may be an effective pharmacological target in allergic and other MC-mediated conditions.
2.In Vitro and In Vivo Validation of EP2-Receptor Agonism to Selectively Achieve Inhibition of Mast Cell Activity
Judith PLAZA ; Rosa TORRES ; Adrián URBANO ; César PICADO ; Fernando de MORA
Allergy, Asthma & Immunology Research 2020;12(4):712-728
Purpose:
Agonism of the prostaglandin E2 receptor, E-prostanoid receptor 2 (EP2), may represent an alternative protective mechanism in mast cell (MC)-mediated diseases. Previous studies have suggested that activation of the MC EP2 receptor prevents pathological changes in the murine models of allergic asthma. This work aimed to analytically validate the EP2 receptor on MCs as a therapeutic target.
Methods:
Murine MC lines and primary cultures, and MCs bearing the human immunoglobulin E (IgE) receptor were subjected to IgE-mediated activation subsequent to incubation with selective EP2 agonists. Two molecularly unrelated agonists, butaprost and CP-533536, were tested either in vitro or in 2 in vivo models of allergy.
Results:
The diverse range of MC populations was consistently inhibited through selective EP2 agonism in spite of exhibiting a heterogeneous phenotype. Such inhibition occurred in both mouse and human IgE (hIgE)-mediated activation. The use of molecularly unrelated selective EP2 agonists allowed for the confirmation of the specificity of this protective mechanism. This effect was further demonstrated in 2 in vivo murine models of allergy where MCs are a key to pathological changes: cutaneous anaphylaxis in a transgenic mouse model expressing the hIgE receptor and aeroallergen-induced murine model of asthma.
Conclusions
Selective EP2 agonism is a powerful pharmacological strategy to prevent MCs from being activated through IgE-mediated mechanisms and from causing deleterious effects. The MC EP2 receptor may be an effective pharmacological target in allergic and other MC-mediated conditions.
3.Hemosuccus pancreaticus as a complication of acute necrotizing pancreatitis: A case report
Eduardo SEGOVIA-VERGARA ; Arturo ALONSO ; Fernando TORRES ; Paula De la Rosa ACUÑA ; Rodrigo MANSILLA-VIVAR
International Journal of Gastrointestinal Intervention 2025;14(2):81-84
Hemosuccus pancreaticus (HP) is characterized by hemorrhage from the pancreatic duct through the major duodenal papilla. It represents the least common cause of upper gastrointestinal bleeding (UGIB), occurring in approximately 1 in 1,500 cases and predominantly affecting men. A 58-yearold woman with a history of recurrent pancreatitis presented with severe epigastric pain, vomiting, and diarrhea. Laboratory tests revealed hyperamylasemia. Imaging indicated acute necrohemorrhagic pancreatitis with peripancreatic fluid collections. Despite interventions including drainage and antibiotic therapy, she developed massive hematemesis and hemodynamic instability. Computed tomography indicated active bleeding in the peripancreatic region, and angiography confirmed a diagnosis of HP. Embolization of the gastroduodenal artery was performed; however, the patient died of multiorgan failure. HP, although rare, should be considered in patients with chronic pancreatitis and intermittent UGIB. Diagnosing HP can be challenging, requiring collaboration between gastroenterologists and interventional radiologists. Early intervention is crucial due to the high mortality rate associated with severe cases.
4.Hemosuccus pancreaticus as a complication of acute necrotizing pancreatitis: A case report
Eduardo SEGOVIA-VERGARA ; Arturo ALONSO ; Fernando TORRES ; Paula De la Rosa ACUÑA ; Rodrigo MANSILLA-VIVAR
International Journal of Gastrointestinal Intervention 2025;14(2):81-84
Hemosuccus pancreaticus (HP) is characterized by hemorrhage from the pancreatic duct through the major duodenal papilla. It represents the least common cause of upper gastrointestinal bleeding (UGIB), occurring in approximately 1 in 1,500 cases and predominantly affecting men. A 58-yearold woman with a history of recurrent pancreatitis presented with severe epigastric pain, vomiting, and diarrhea. Laboratory tests revealed hyperamylasemia. Imaging indicated acute necrohemorrhagic pancreatitis with peripancreatic fluid collections. Despite interventions including drainage and antibiotic therapy, she developed massive hematemesis and hemodynamic instability. Computed tomography indicated active bleeding in the peripancreatic region, and angiography confirmed a diagnosis of HP. Embolization of the gastroduodenal artery was performed; however, the patient died of multiorgan failure. HP, although rare, should be considered in patients with chronic pancreatitis and intermittent UGIB. Diagnosing HP can be challenging, requiring collaboration between gastroenterologists and interventional radiologists. Early intervention is crucial due to the high mortality rate associated with severe cases.
5.Hemosuccus pancreaticus as a complication of acute necrotizing pancreatitis: A case report
Eduardo SEGOVIA-VERGARA ; Arturo ALONSO ; Fernando TORRES ; Paula De la Rosa ACUÑA ; Rodrigo MANSILLA-VIVAR
International Journal of Gastrointestinal Intervention 2025;14(2):81-84
Hemosuccus pancreaticus (HP) is characterized by hemorrhage from the pancreatic duct through the major duodenal papilla. It represents the least common cause of upper gastrointestinal bleeding (UGIB), occurring in approximately 1 in 1,500 cases and predominantly affecting men. A 58-yearold woman with a history of recurrent pancreatitis presented with severe epigastric pain, vomiting, and diarrhea. Laboratory tests revealed hyperamylasemia. Imaging indicated acute necrohemorrhagic pancreatitis with peripancreatic fluid collections. Despite interventions including drainage and antibiotic therapy, she developed massive hematemesis and hemodynamic instability. Computed tomography indicated active bleeding in the peripancreatic region, and angiography confirmed a diagnosis of HP. Embolization of the gastroduodenal artery was performed; however, the patient died of multiorgan failure. HP, although rare, should be considered in patients with chronic pancreatitis and intermittent UGIB. Diagnosing HP can be challenging, requiring collaboration between gastroenterologists and interventional radiologists. Early intervention is crucial due to the high mortality rate associated with severe cases.
6.Trichuris vulpis (Froelich, 1789) Infection in a Child: A Case Report.
Adrian MARQUEZ-NAVARRO ; Gudelio GARCIA-BRACAMONTES ; Blanca E ALVAREZ-FERNANDEZ ; Luz P AVILA-CABALLERO ; Isabel SANTOS-ARANDA ; Dylan L DIAZ-CHIGUER ; Rosa M SANCHEZ-MANZANO ; Elvia RODRIGUEZ-BATAZ ; Benjamin NOGUEDA-TORRES
The Korean Journal of Parasitology 2012;50(1):69-71
We present a human infection with the canine whipworm, Trichuris vulpis, in a child suffering from rhinitis with a diagnosis of rhinitis. T. vulpis eggs resemble those of T. trichiura but they can be differentiated based on their morphological features and egg size, using micrometry with an ocular micrometer. T. vulpis eggs measured an average of 90 microm by 44 microm (range 86-99 microm by 38-47 microm). Prevalence of hookworms (28.1%), Toxocara canis (11.8%), and Trichuris vulpis (3.5%) was found in 292 fecal samples of dogs collected at the peri-domicile, which showed that the risk of infection was not only fortuitous. The treatment of canine whipworm infections is similar to that of T. trichiura infection. We recommend differentiation of the 2 species for their epidemiological and prevention implications.
Animals
;
Child
;
Feces/parasitology
;
Female
;
Humans
;
Trichuriasis/diagnosis/*parasitology
;
Trichuris/*isolation & purification/physiology
7.The nutritional status of Filipino pregnant adolescents 14 to 19 years old in a tertiary hospital.
Vanessa-Maria F. TORRES-TICZO ; Emma ALESNA-LLANTO ; Rosa Ma. H. NANCHO
Acta Medica Philippina 2020;54(3):251-263
Objectives. 1) To determine the nutritional status of pregnant adolescents aged 14 to 19 years seen at the Philippine General Hospital Teen Mom Clinic from February to July 2014; 2) To describe the demographic characteristics, pregnancy history, and lifestyle and health habits of adolescent mothers; 3) To describe the adequacy of the daily intake of nutrients (caloric energy, carbohydrates, protein, fats, folate, calcium, and iron) of adolescent mothers; and 4) To determine the association of specific demographic characteristics with body mass index categories.
Methods. This was a prospective cross-sectional study. Included were the pregnant adolescents aged 14 to 19 years of age, referred to the Teen Mom Clinic, who planned to deliver at the Philippine General Hospital. Informed consent and assent forms were signed, and the principal investigator interviewed the subjects for demographic and clinical history at the time of enrolment. The adolescents were taught and instructed to fill up the food diary (2 weekdays and 1 weekend) and the food frequency (once) forms. These were submitted on their next visit and given to a licensed nutritionist for analysis. The nutritional status was assessed by gathering the weight and height of the patients in order to compute for the body mass index at the time of enrolment in the study.
Results. The percentage distribution of nutritional status of pregnant adolescents consisted of the following: 65% normal; 28% underweight; 3.5% overweight; 3.5% obese. The 60 pregnant adolescents had a mean age of 16.9 years (SD 1.2). Their partners had a mean age of 20.3 years [SD 3.8]. On the average, they had a total of five pre-natal checkups. Majority of the respondents (85%) still depended primarily on their parents for financial support. Around 93% of the pregnancies were unplanned. Their median percent adequacy for daily calories was 72%, carbohydrates 69%, proteins 73%, and fats 86%. For the micronutrients, the median percent adequacies for folate, calcium, and iron, based on the needs of pregnant women, were 18%, 63%, and 29%, respectively. If amounts were compared to the requirements by age, the median adequacies of intake were 27%, 50%, and 41%, respectively. The nutritional status was not found dependent on the age, educational attainment, number of siblings, and the monthly family income of the respondents.
Conclusion. Only 65% of the pregnant adolescents had normal nutritional status. There was still an elevated level of malnutrition among pregnant adolescents as shown in this study: 28% were underweight, 3.3% were overweight, and another 3.3% were obese.
Human ; Female ; Adolescent (a Person 13-18 Years Of Age)
8.A maternal diet high in carbohydrates causes bradyarrhythmias and changes in heart rate variability in the offspring sex-dependent in mice
Rosa Elena ARROYO-CARMONA ; Yareth MITRE-VELASCO ; Ygnacio MARTINEZ-LAGUNA ; Julián TORRES-JÁCOME ; Alondra ALBARADO-IBAÑEZ
Laboratory Animal Research 2024;40(3):374-382
Background:
Maternal obesity prepregnancy, as well as gestational overweight produced by high-sucrose diet, could be evolved to the cardiometabolic diseases in offspring during adulthood. Until then, the cardiometabolic diseases were ignored that have been presented or inherited in the offspring for overnutrition were ignored, depend on gender. We proposed that maternal prepregnancy obesity in CD1 mice, as well as gestational overweight produced by a high sucrose diet, develop to cardiometabolic disease in offspring and even if gender. For detection of the cardiometabolic diseases in a Murine model with a high sucrose diet (HSD), the time series formed by the RR intervals taken from lead I of the ECG has used the corresponding Poincare plot. The heart rate variability was characterized by the standard deviation of width and length SD1, SD2 respectively of the Poincare plot and the SD1/SD2 correlation index in addition was calculated between to gender and body weight.
Results:
A maternal diet was based high sucrose diet and produced overweight on progeny in both sexes, but the cardiac arrhythmias depended on gender. Other results were due to the chronic effect of high sucrose diet in offspring with this intrauterine ambiance that contributes to changes in HRV, arrhythmias, and sinus pauses, also these phenomena were observed just in the male mice offspring with high sucrose diet during adulthood.
Conclusions
We propose, that the arrhythmias originated from fetal programming due to the maternal diet in mice model and produced alterations in the offspring female more than in the male, probably due to hormones.
9.Oxidative stress, the blood-brain barrier and neurodegenerative diseases: The critical beneficial role of dietary antioxidants.
Jin FENG ; Youle ZHENG ; Mingyue GUO ; Irma ARES ; Marta MARTÍNEZ ; Bernardo LOPEZ-TORRES ; María-Rosa MARTÍNEZ-LARRAÑAGA ; Xu WANG ; Arturo ANADÓN ; María-Aránzazu MARTÍNEZ
Acta Pharmaceutica Sinica B 2023;13(10):3988-4024
In recent years, growing awareness of the role of oxidative stress in brain health has prompted antioxidants, especially dietary antioxidants, to receive growing attention as possible treatments strategies for patients with neurodegenerative diseases (NDs). The most widely studied dietary antioxidants include active substances such as vitamins, carotenoids, flavonoids and polyphenols. Dietary antioxidants are found in usually consumed foods such as fresh fruits, vegetables, nuts and oils and are gaining popularity due to recently growing awareness of their potential for preventive and protective agents against NDs, as well as their abundant natural sources, generally non-toxic nature, and ease of long-term consumption. This review article examines the role of oxidative stress in the development of NDs, explores the 'two-sidedness' of the blood-brain barrier (BBB) as a protective barrier to the nervous system and an impeding barrier to the use of antioxidants as drug medicinal products and/or dietary antioxidants supplements for prevention and therapy and reviews the BBB permeability of common dietary antioxidant suplements and their potential efficacy in the prevention and treatment of NDs. Finally, current challenges and future directions for the prevention and treatment of NDs using dietary antioxidants are discussed, and useful information on the prevention and treatment of NDs is provided.