Indocyanine green fluorescence angiography in colorectal surgery: A retrospective case-control analysis in Mexico.

INTRODUCTION AND AIMS: An anastomotic leak is one of the most dreaded complications in colorectal surgery because it increases postoperative morbidity and mortality. The aim of the present study was to identify whether indocyanine green fluorescence angiography (ICGFA) reduced the anastomotic dehiscence rate in colorectal surgery. MATERIAL AND METHODS: A retrospective study on patients that underwent colorectal surgery with colonic resection or low anterior resection and primary anastomosis, within the time frame of January 2019 and September 2021, was conducted. The patients were divided into the case group, in which ICGFA was performed for the intraoperative evaluation of blood perfusion at the anastomosis site, and the control group, in which ICGFA was not utilized. RESULTS: A total of 168 medical records were reviewed, resulting in 83 cases and 85 controls. Inadequate perfusion that required changing the surgical site of the anastomosis was identified in 4.8% of the case group (n = 4). A trend toward reducing the leak rate with ICGFA was identified (6% [n = 5] in the cases vs 7.1% in the controls [n = 6] [p = 0.999]). The patients that underwent anastomosis site change due to inadequate perfusion had a 0% leak rate. CONCLUSIONS: ICGFA as a method to evaluate intraoperative blood perfusion showed a trend toward reducing the incidence of anastomotic leak in colorectal surgery.

Local immune response as novel disease mechanism underlying abdominal pain in patients with irritable bowel syndrome.

OBJECTIVES: Irritable bowel syndrome (IBS) is the most frequently diagnosed functional gastrointestinal disorder, with a prevalence of up to 25% of the global population. IBS patients suffer from abnormal abdominal pain, or visceral hypersensitivity (VHS), associated with altered bowel habits in the absence of an organic detectable cause. The pathophysiology of the disease is incompletely understood, but the dysregulation of the brain-gut axis is well established in IBS. METHODS: IBS onset is mainly triggered by infectious gastroenteritis, psychological factors, and dietary factors, but genetic predispositions and intestinal dysbiosis might also play a role. Additionally, immune activation, and particularly chronic mast cell activation, have been shown to underlie the development of abdominal pain in IBS. RESULTS: By releasing increased levels of mediators, including histamine, mast cells sensitize enteric nociceptors and lead to VHS development. The mechanisms underlying aberrant mast cell activation in IBS are still under investigation, but we recently showed that a local break in oral tolerance to food antigens led to IgE-mediated mast cell activation and food-induced abdominal pain in preclinical models and in IBS patients. CONCLUSION: The concept of food-mediated VHS highlights the potential of therapies targeting upstream mechanisms of mast cell sensitization to treat IBS.

Indocyanine green fluorescence angiography in colorectal surgery. First case series in Mexico.

INTRODUCTION AND AIM: Anastomosis leak occurs in 1-19% of colorrectal surgeries. Our objective was to present the first Mexican case series on colorrectal surgery using indocyanine green fluorescence angiography to evaluate perfusion prior to carrying out the anastomosis. MATERIALS AND METHODS: A retrospective, analytic, descriptive study was conducted. We studied the case records of consecutive patients that underwent colorrectal surgery with indocyanine green angiography performed by the same group of colorrectal surgeons. RESULTS: Twenty-one case records were reviewed. Eleven (52.3%) of the patients were women, mean patient age was 57 years (38-82), and mean body mass index was 25 kg/m2 (17-34). Fifteen (71.4%) patients were diagnosed with malignant disease. Indocyanine green angiography changed our therapeutic decision in three (14.2%) patients. Two colorrectal anastomoses (14.2%) were performed at fewer than 5 cm from the anal verge and 13 (61.9%) were performed at more than 5 cm from the anal verge. Three of the anastomoses were ileocolic (14.2%), two were coloanal (9.5%), and one was ileoanal (4.7%). There were six (28.5%) complications, no cases of anastomotic leak, and no complications associated with the use of indocyanine green. The mortality rate was 0%. CONCLUSION: The present case series is the first on colorrectal surgery conducted in Mexico using indocyanine green fluorescence angiography, with excellent results.

Severe bowel complications in SARS-CoV-2 patients receiving protocolized care.

INTRODUCTION AND AIMS: A case series of ten patients that received protocolized care for SARS-CoV-2 infection and developed severe gastrointestinal complications, is presented. The aim of our study was to contribute to the ongoing discussion regarding gastrointestinal complications related to SARS-CoV-2 infection. After reviewing the current literature, ours appears to be the first detailed case series on the topic. MATERIALS AND METHODS: A retrospective filtered search of all patients admitted to our hospital for SARS-CoV-2 infection, who developed severe gastrointestinal complications, was performed. All relevant data on hospital patient management, before and after surgery, were collected from the medical records. RESULTS: Of the 905 patients admitted to our hospital due to SARS-CoV-2 infection, as of August 26, 2020, ten of them developed severe gastrointestinal complications. Seven of those patients were men. There were four cases of perforation of the proximal jejunum, three cases of perforations of the ascending colon, one case of concomitant perforation of the sigmoid colon and terminal ileum, one case of massive intestinal necrosis, and one preoperative death. Three right colectomies, four intestinal resections, one Hartmann's procedure with bowel resection, and one primary repair of the small bowel were performed. The mortality rate of the patients analyzed was 50%. CONCLUSION: Spontaneous bowel perforations and acute mesenteric ischemia are emerging as severe, life-threatening complications in hospitalized SARS-CoV-2 patients. More evidence is needed to identify risk factors, establish preventive measures, and analyze possible adverse effects of the current treatment protocols.

[Severe bowel complications in SARS-CoV-2 patients receiving protocolized care]. / Complicaciones intestinales graves en pacientes SARS-CoV-2 recibiendo manejo protocolizado.

Introduction and aims: A case series of ten patients that received protocolized care for SARS-CoV-2 infection and developed severe gastrointestinal complications, is presented. The aim of our study was to contribute to the ongoing discussion regarding gastrointestinal complications related to SARS-CoV-2 infection. After reviewing the current literature, ours appears to be the first detailed case series on the topic. Materials and methods: A retrospective filtered search of all patients admitted to our hospital for SARS-CoV-2 infection, who developed severe gastrointestinal complications, was performed. All relevant data on hospital patient management, before and after surgery, were collected from the medical records. Results: Of the 905 patients admitted to our hospital due to SARS-CoV-2 infection, as of August 26, 2020, ten of them developed severe gastrointestinal complications. Seven of those patients were men. There were four cases of perforation of the proximal jejunum, three cases of perforations of the ascending colon, one case of concomitant perforation of the sigmoid colon and terminal ileum, one case of massive intestinal necrosis, and one preoperative death. Three right colectomies, four intestinal resections, one Hartmann's procedure with bowel resection, and one primary repair of the small bowel were performed. The mortality rate of the patients analyzed was 50%. Conclusion: Spontaneous bowel perforations and acute mesenteric ischemia are emerging as severe, life-threatening complications in hospitalized SARS-CoV-2 patients. More evidence is needed to identify risk factors, establish preventive measures, and analyze possible adverse effects of the current treatment protocols.

Indocyanine green fluorescence angiography in colorrectal surgery. First case series in Mexico. / Angiografía por fluorescencia con verde de indocianina para cirugía de colon y recto. Primera serie reportada en México.

INTRODUCTION AND AIM: Anastomotic leak occurs in 1-19% of colorrectal surgeries. Our objective was to present the first Mexican case series on colorrectal surgery using indocyanine green fluorescence angiography to evaluate perfusion prior to carrying out the anastomosis. MATERIALS AND METHODS: A retrospective, analytic, descriptive study was conducted. We studied the case records of consecutive patients that underwent colorrectal surgery with indocyanine green angiography performed by the same group of colorrectal surgeons. RESULTS: Twenty-one case records were reviewed. Eleven (52.3%) of the patients were women, mean patient age was 57 years (38-82), and mean body mass index was 25 kg/m2 (17-34). Fifteen (71.4%) patients were diagnosed with malignant disease. Indocyanine green angiography changed our therapeutic decision in three (14.2%) patients. Two colorrectal anastomoses (14.2%) were performed at fewer than 5 cm from the anal verge and 13 (61.9%) were performed at more than 5 cm from the anal verge. Three of the anastomoses were ileocolic (14.2%), two were coloanal (9.5%), and one was ileoanal (4.7%). There were six (28.5%) complications, no cases of anastomotic leak, and no complications associated with the use of indocyanine green. The mortality rate was 0%. CONCLUSION: The present case series is the first on colorrectal surgery conducted in Mexico using indocyanine green fluorescence angiography, with excellent results.

Histamine-mediated potentiation of transient receptor potential (TRP) ankyrin 1 and TRP vanilloid 4 signaling in submucosal neurons in patients with irritable bowel syndrome.

Previously, we showed histamine-mediated sensitization of transient receptor potential (TRP) vanilloid 1 (TRPV1) in patients with irritable bowel syndrome (IBS). Sensitization of TRP ankyrin 1 (TRPA1) and TRP vanilloid 4 (TRPV4) are also involved in aberrant pain perception in preclinical models of somatic pain. Here, we hypothesize that in parallel with TRPV1, histamine sensitizes TRPA1 and TRPV4, contributing to increased visceral pain in patients with IBS. Rectal biopsies were collected from patients with IBS and healthy subjects (HS) to study neuronal sensitivity to TRPA1 and TRPV4 agonists (cinnamaldehyde and GSK1016790A) using intracellular Ca2+ imaging. In addition, the effect of supernatants of rectal biopsies on patients with IBS and HS was assessed on TRPA1 and TRPV4 responses in murine dorsal root ganglion (DRG) sensory neurons. Finally, we evaluated the role of histamine and histamine 1 receptor (H1R) in TRPA1 and TRPV4 sensitization. Application of TRPA1 and TRPV4 agonists evoked significantly higher peak amplitudes and percentage of responding submucosal neurons in biopsies of patients with IBS compared with HS. In HS, pretreatment with histamine significantly increased the Ca2+ responses to cinnamaldehyde and GSK1016790A, an effect prevented by H1R antagonism. IBS supernatants, but not of HS, sensitized TRPA1 and TRPV4 on DRG neurons. This effect was reproduced by histamine and prevented by H1R antagonism. We demonstrate that the mucosal microenvironment in IBS contains mediators, such as histamine, which sensitize TRPV4 and TRPA1 via H1R activation, most likely contributing to increased visceral pain perception in IBS. These data further underscore H1R antagonism as potential treatment for IBS. NEW & NOTEWORTHY We provide evidence for histamine-mediated transient receptor potential (TRP) ankyrin 1 and TRP vanilloid 4 sensitization in irritable bowel syndrome (IBS) via histamine 1 receptor (H1R) activation, most likely contributing to increased visceral pain perception. Our results reveal a general role of sensory TRP channels as histamine effectors in the pathophysiology of IBS and provide novel mechanistic insights into the therapeutic potential of H1R antagonism in IBS.

Evidence for long-term sensitization of the bowel in patients with post-infectious-IBS.

Post-infectious irritable bowel syndrome (PI-IBS) is a common gastrointestinal disorder characterized by persistent abdominal pain despite recovery from acute gastroenteritis. The underlying mechanisms are unclear, although long-term changes in neuronal function, and low grade inflammation of the bowel have been hypothesized. We investigated the presence and mechanism of neuronal sensitization in a unique cohort of individuals who developed PI-IBS following exposure to contaminated drinking water 7 years ago. We provide direct evidence of ongoing sensitization of neuronal signaling in the bowel of patients with PI-IBS. These changes occur in the absence of any detectable tissue inflammation, and instead appear to be driven by pro-nociceptive changes in the gut micro-environment. This is evidenced by the activation of murine colonic afferents, and sensitization responses to capsaicin in dorsal root ganglia (DRGs) following application of supernatants generated from tissue biopsy of patients with PI-IBS. We demonstrate that neuronal signaling within the bowel of PI-IBS patients is sensitized 2 years after the initial infection has resolved. This sensitization appears to be mediated by a persistent pro-nociceptive change in the gut micro-environment, that has the capacity to stimulate visceral afferents and facilitate neuronal TRPV1 signaling.

Effect of genetic background and postinfectious stress on visceral sensitivity in Citrobacter rodentium-infected mice.

BACKGROUND: Infectious gastroenteritis is a major risk factor to develop postinfectious irritable bowel syndrome (PI-IBS). It remains unknown why only a subgroup of infected individuals develops PI-IBS. We hypothesize that immunogenetic predisposition is an important risk factor. Hence, we studied the effect of Citrobacter rodentium infection on visceral sensitivity in Th1-predominant C57BL/6 and Th2-predominant Balb/c mice. METHODS: Eight-week-old mice were gavaged with C. rodentium, followed by 1 h of water avoidance stress (WAS) at 5 weeks PI. At 10, 14 days, and 5 weeks PI, samples were assessed for histology and inflammatory gene expression by RT-qPCR. Visceral sensitivity was evaluated by visceromotor response recordings (VMR) to colorectal distension. KEY RESULTS: Citrobacter rodentium evoked a comparable colonic inflammatory response at 14 days PI characterized by increased crypt length and upregulation of Th1/Th17 cytokine mRNA levels (puncorrected  < 0.05) in both C57BL/6 and Balb/c mice. At 5 weeks PI, inflammatory gene mRNA levels returned to baseline in both strains. The VMR was maximal at 14 days PI in C57BL/6 (150 ± 47%; p = 0.02) and Balb/c mice (243 ± 52%; p = 0.03). At 3 weeks PI, the VMR remained increased in Balb/c (176 ± 23%; p = 0.02), but returned to baseline in C57BL/6 mice. At 5 weeks PI, WAS could not re-introduce visceral hypersensitivity (VHS). CONCLUSIONS & INFERENCES: Citrobacter rodentium infection induces transient VHS in C57BL/6 and Balb/c mice, which persisted 1 week longer in Balb/c mice. Although other strain-related differences may contribute, a Th2 background may represent a risk factor for prolonged PI-VHS. As PI-VHS is transient, other factors are crucial for persistent VHS development as observed in PI-IBS.

Score clínico para el descarte de neumonía por Mycoplasma pneumoniae / Clinical score to rule out pneumonia due to Mycoplasma pneumoniae

INTRODUCCIÓN: La prueba de oro para el diagnóstico de la neumonía secundaria a Mycoplama pneumoniae es la detección de IgM en pruebas seriadas, ya que una prueba aislada para IgM tiene una sensibilidad del 31,8%. Al existir un cuadro clínico diferenciable de la neumonía por M. pneumoniae de otras etiologías es posible realizar un score clínico para su diagnóstico temprano. OBJETIVO: Elaboración de un score clínico para el descarte de neumonía secundaria a M. pneumoniae. METODOLOGÍA: Se evaluaron 302 expedientes; población de 0 a 18 años con diagnóstico de neumonía. Se obtuvieron 2 grupos: Mycoplasma positivo y Mycoplasma negativo, y utilizando distintas variables en la historia clínica se elaboró un score clínico. RESULTADOS: Treinta y cuatro casos se clasificaron en Mycoplasma positivo y 268 en Mycoplasma negativo. Las variables relevantes para la elaboración del score fueron edad, días con tos y días con fiebre, con lo que se conformó el score tos, edad, fiebre (TEF). Se asignaron rangos para cada variable y puntos para cada rango. Un valor de igual o mayor a 5 equivale a un score positivo. Se aplicó el score TEF a los 302 casos resultando ahora en 164 casos Mycoplasma positivo y 138 Mycoplasma negativo. Este score resultó en una sensibilidad del 85% y especificidad del 49%. CONCLUSIÓN: El score TEF tuvo mejor sensibilidad que otras herramientas diagnósticas clínicas. Con un valor predictivo negativo del 96% es posible descartar anticipadamente una neumonía por M. pneumoniae. Se requiere realizar un estudio prospectivo para verificar la utilidad de nuestro score

INTRODUCTION: The gold standard for the diagnosis of pneumonia secondary to Mycoplasma pneumoniae is the serial measurement of IgM, since an isolated test for IgM has a poor sensitivity of 31.8%. A pneumonia due to Mycoplasma pneumoniae could be of clinically different origins, thus it is possible to perform a clinical score for its early diagnosis. OBJECTIVE: To develop a clinical score in order to rule out a pneumoniae secondary to Mycoplasma pneumoniae. METHODOLOGY: A total of 302 patients from 0 to 18 years-old, with a diagnosis of pneumonia were evaluated and divided into two groups: Mycoplasma positive and Mycoplasma negative. Using different variables in the medical records a clinical score was calculated. RESULTS: Of the 302 cases studied, 34 were classified as Mycoplasma positive and 268 as Mycoplasma negative. The variables relevant to the calculation of the score were age, days with fever, and days with cough, thus providing the CAF (Cough, Age, Fever) score. Ranges were assigned for each variable and points were given for each range. A value greater than or equal to 5 meant a positive score. The CAF score was applied to the 302 cases, resulting in 164 cases of Mycoplasma positive and 138 cases of Mycoplasma negative. The CAF score had a sensitivity of 85% and specificity of 49%. CONCLUSION: The CAF score had better sensitivity than other clinical diagnostic tools. With a negative predictive value of 96% it is possible to rule out a pneumonia secondary to M. pneumoniae. The study requires a prospective study to verify the usefulness of our score

[Clinical score to rule out pneumonia due to Mycoplasma pneumoniae]. / Score clínico para el descarte de neumonía por Mycoplasma pneumoniae.

INTRODUCTION: The gold standard for the diagnosis of pneumonia secondary to Mycoplasma pneumoniae is the serial measurement of IgM, since an isolated test for IgM has a poor sensitivity of 31.8%. A pneumonia due to Mycoplasma pneumoniae could be of clinically different origins, thus it is possible to perform a clinical score for its early diagnosis. OBJECTIVE: To develop a clinical score in order to rule out a pneumoniae secondary to Mycoplasma pneumoniae. METHODOLOGY: A total of 302 patients from 0 to 18 years-old, with a diagnosis of pneumonia were evaluated and divided into two groups: Mycoplasma positive and Mycoplasma negative. Using different variables in the medical records a clinical score was calculated. RESULTS: Of the 302 cases studied, 34 were classified as Mycoplasma positive and 268 as Mycoplasma negative. The variables relevant to the calculation of the score were age, days with fever, and days with cough, thus providing the CAF (Cough, Age, Fever) score. Ranges were assigned for each variable and points were given for each range. A value greater than or equal to 5 meant a positive score. The CAF score was applied to the 302 cases, resulting in 164 cases of Mycoplasma positive and 138 cases of Mycoplasma negative. The CAF score had a sensitivity of 85% and specificity of 49%. CONCLUSION: The CAF score had better sensitivity than other clinical diagnostic tools. With a negative predictive value of 96% it is possible to rule out a pneumonia secondary to M. pneumoniae. The study requires a prospective study to verify the usefulness of our score.

[Incidence and mortality due to cancer in Navarre, 1998-2002. Trends in the last 30 years]. / Incidencia y mortalidad por cáncer en Navarra, 1998-2002. Evolución en los últimos 30 años.

Between 1998-2002, 16,952 new cases of cancer were registered in Navarre. In men, the most frequently diagnosed cancers were in the following order: prostate, lung, colon and rectum, bladder and stomach, which accounted for 63.2%. In women, the sites were breast, colon and rectum, corpus uteri, stomach and ovary, which accounted for 57.6% of the cases. In the same period, 1998-2002, 4,127 men and 2,470 women died from cancer. Sixty percent of all deaths due to malign tumours in men were due to cancer of the lung, prostate, colon and rectum, stomach and bladder. In women this was due to cancers of colon and rectum, breast, stomach, pancreas and lung, which accounted for 49% of the cases. In men in Navarre there has been an increase in the incidence rates of cancer of the prostate, kidney and non-Hodgkin lymphoma. Avoidable cancers such as those related to smoking (lung, oral cavity and pharynx or pancreas) continue to rise, and represent a greater global risk of dying from cancer in the latest period studied than in the decades of the 1970s and 1980s. From 1995 up to the present, mortality due to cancer has moved from occupying the second place to become the first cause of death among men in Navarre. The global risk of death due to cancer in men is now equal to the first period studied, 1975-1977. Amongst women the global risk of death due to cancer fell by 25% between 1975 and 2002, basically at the cost of breast and stomach cancer. Tumours related to smoking increased both in mortality and in incidence and appear as a significant health problem amongst women in Navarre. Breast cancer has increased in incidence, with lower mortality figures than those of the first period 1975-1977. Invasive cancer of the cervix remains at very low rates in comparison with many European countries, including Spain. In both sexes colorectal and skin cancer has increased, while the incidence and mortality of stomach cancer continues to fall.

Incidencia y mortalidad por cáncer en Navarra, 1998-2002. Evolución en los últimos 30 años / Incidence and mortality due to cancer in Navarre, 1998-2002. Trends in the last 30 years

entre 1998-2002 se registraron 16.952 nuevos casos de cáncer en Navarra. En los hombres, los cánceres más frecuentes diagnosticados fueron, por este orden próstata, pulmón,colon y recto, vejiga y estómago, que sumaron el 63,2% de todos los casos de cáncer. En mujeres las localizaciones de mama, colon y recto, cuerpo de útero, estómago y ovario sumaron el 57,6% del total de los casos. En el mismo periodo, 1998-2002, fallecieron por cáncer 4.127 hombre y 2.470 mujeres. el 60% de todas las muertes producidas por tumores malignos en hombres se debieron a las localizaciones de pulmón, próstata,colon y recto, estómago y vejiga. En las mujeres las localizaciones de colon y recto, mama,estómago, páncreas y pulmón, sumaron el 49% de las defunciones por cáncer. En los hombre de Navarra han aumentado las tasas de incidencia del cáncer de próstata, riñón y linfoma no Hodgkin. Cánceres evitables, como los relacionados con el hábito de fumar (pulmón,cavidad oral y faringe o páncreas),continúan en ascento, y representan mayor riesgo global de morir por cáncer en el último periodo estudiado que en las décadas de los años 1970 y 1980. A partir de 1995 y hasta la actualidad, la mortalidad por cáncer pasó a ocupar el segundo lugar a ser la primera causa de muerte por cáncer en hombres se ha igualado al primer periodo estudiado 1975-1977. Entre las mujeres el riesgo gloval de muerte por cáncer descendió un 25% entre 1975 y 2002, a costa fundamentalmente del cáncer de mama y de estómago. Los tumores relacionados con el hábito de fumar muestran incrementos tanto en la mortalidad como en la incidencia y emergencia como un problema importante de salud entre las mujeres de Navarra. Ha aumentado la incidencia de cáncer de mama, en cambio en la mortalidad se sitúa en cifras inferiores a las del primer periodo 1975-1977. El cáncer invasivo de cérvix se mantiene en tasas muy bajas respecto a muchos países europeos, incluida España. En ambos sexos ha aumentado el cáncer colorrectal y el melanoma mientras que continúa el descenso de la incidencia y mortalidad por cáncer de estómago

Between 1998-2002, 16,952 new cases of cancer were registered in Navarre. In men, the most frequently diagnosed cancers were in the following order: prostate, lung, colon and rectum, bladder and stomach, which accounted for 63.2%, In women, the sites were breast, colon and rectum, corpus uteri, stomach and ovary, which accounted for 57,6% of the cases. In the same period, 1998-2002m 4,127 men and 2,470 women died from cancer. Sixty percent of all deaths due to malign tumours in men were due to cancer od the lung, prostate, colon and rectum, stomach and bladder. In women this was due to cancers of colon and rectum, breast, stomach, pancreas and lung, which accounted for 49% of the cases. In men in Navarre there has been an increase in the incidence rates of cancer on the prostate, kidney and non Hodgkin lymphoma. Avoidable cancers such as those related to smoking (lung, oral cavity and pharynx or pancreas) continue to rise, and represent a greater global risk of dying from cancer in the latest period studied than in the decades of the 1970s and 1980s. From 1995 up to the present, mortality due to cancer has moved from occupying the second place to become the first cause of death among men in Navarre. The global risk of death due to cancer in men is now equal to the first period studied 1975-1977. Amongst women the global risk of death due to cancer fell by 25% between 1975 and 2002 basically at the cost of breast and stomach cancer. Tumours related to smoking increased both in mortality and in incidence and appear as a significant health problem amongst women in Navarre. Breast cancer has increased in incidence, with lower mortality figures than those of the first period 1975-1977. Invasive cancer of the cervix remains at very low rates in comparison with many European countries, including Spain

Enfermedad celiaca y diabetes / Celiac disease and diabetes

La enfermedad celiaca (EC) es una inflamación crónica autoinmunitaria del intestino delgado, causada por una intolerancia al gluten en pacientes predispuestos genéticamente. La mayoría de pacientes con EC no presentan síntomas típicos, como diarrea, desnutrición o dolor abdominal, sino que son asintomáticos u oligosintomáticos, con clínica de osteoporosis, anemia ferropénica, elevación de transaminasas, etc. En estos casos, el diagnóstico únicamente puede realizarse mediante un cribado utilizando la serología, la determinación de haplotipos y la biopsia intestinal. La asociación con otras enfermedades autoinmunitarias es frecuente, fundamentalmente con la diabetes mellitus tipo 1 (DM1). La prevalencia de la EC en pacientes diagnosticados de DM1 es aproximadamente del 6,5%, y la mayoría de ellos no presenta síntomas digestivos. No se conoce el nexo de unión para ambas enfermedades, pero se especula que la exposición al gluten durante largos periodos de tiempo se relaciona con la presencia de anticuerpos anticélula pancreática, que podrían favorecer el desarrollo de la diabetes mellitus. La mayoría de los pacientes con DM1 celiacos que siguen una dieta exenta de gluten se benefician de un mejor control de la glucemia. Dado que en la mayoría de pacientes se diagnostica una DM1 antes que una enfermedad celiaca, es aconsejable en la actualidad realizar una técnica de cribado con marcadores serológicos de EC y, si los resultados son positivos, una biopsia del intestino delgado. El beneficio que tendría el diagnóstico de la EC en esta población de tan alto riesgo sería evitar, a largo plazo, complicaciones tan graves como la osteoporosis y el linfoma intestinal

Celiac disease is characterized by chronic autoimmune inflammation of the small bowel, produced by gluten intolerance, in genetically predisposed individuals. Most celiac patients do not present typical symptoms such as diarrhea, malnutrition or abdominal pain. They have usually few symptoms or none at all, although clinical evidence of osteoporosis, iron-deficiency anemia, elevated transaminases, etc., may be found. In these cases, the diagnosis has to be based on serological screening, haplotype determination and intestinal biopsy. It is frequently associated with other autoimmune diseases, especially with type 1 diabetes. The prevalence of celiac disease in patients diagnosed with type 1 diabetes is 6.5% and, in most cases, the patients are asymptomatic in terms of gastrointestinal problems. The link between the two diseases is unknown, but it is speculated that exposure to gluten over long periods of time is related to the presence of antibodies against pancreatic cells that could favour the development of diabetes. The majority of celiac patients with type 1 diabetes who follow a gluten-free diet also achieve a better glycemic control. Given that most of the patients are diagnosed as having type 1 diabetes prior to the diagnosis of celiac disease, it is currently recommended to perform a screening using serological markers for celiac disease and, if positive, a biopsy of the small intestine should be performed. The benefit of confirming the diagnosis of celiac disease in this high-risk population would be the avoidance, over the long-term, of complications as serious as osteoporosis and intestinal lymphoma

Synthesis of (+/-)-leucomalure [(3Z,6R*,7S*,9R*,10S*)-cis-6,7-cis-9,10-diepoxy-3-henicosene], the major components of the female sex pheromone of the satin moth.

The racemate of leucomalure [(3Z,6R*,7S*,9R*,10S*)-cis-6,7-cis-9,10-diepoxy-3-henicosene (1)] and its (3Z,6R*,7S*,9S*,10R*)-isomer were synthesized via acetylenic intermediates in an unambiguous manner.