Hyperinsulinemic hypoglycemia secondary to multiple beta cell adenomas in a boxer bitch

Background: The most frequent pancreatic tumours are derived from insulin-secreting β cells, commonly called insulinomas; these are characterised by high insulin secretion causing hypoglycemia and clinical signs such as seizures,tremors, weakness, and polyphagia, among others. In dogs, this tumour represents <0.5% of neoplasias; the majority aresolitary carcinoma masses and rarely adenomas. Insulin-secreting tumours are usually diagnosed in middle-aged or olderdogs. There is no apparent sex predilection for the disease and it has been mainly reported in medium to large breeds.Independently of whether they are adenomas or carcinomas, dogs have the same disease-free time and survival time andthe prognosis is poor.Case: An 8-year-old female Boxer was brought to the University Veterinary Hospital with a history of weakness, tremors,and generalised convulsions. Physical examination, CBC and urinalysis revealed no abnormalities. In the blood chemistryprofile, hypoglycemia was detected along with hyperinsulinemia. An abdominal ultrasound revealed the presence of twoabnormal masses located in the pancreas. The insulin:glucose ratio was 59.8. Exploratory celiotomy was performed andtwo masses were located in the mesentery, adjacent to the left pancreatic lobe, and a third was in the pancreatic tissue ofthe same lobule. All masses were resected during the same surgery. Cytology of the masses coincided with apparentlymalignant insulinoma, however, the histopathological and immunohistochemically report indicated an insulin-secretingadenoma. The patient improved clinically and remained stable for approximately 545 days, after which seizures relapsedand a new treatment was not approved. The patient died 575 days after surgery.Discussion: In dogs, pancreatic islet cell tumours correspond to endocrinologically active neoplasm that secrete hormonesand are associated with functional disorders (hyperinsulinemia) in relation to hypoglycemia...

Hyperinsulinemic hypoglycemia secondary to multiple beta cell adenomas in a boxer bitch

Background: The most frequent pancreatic tumours are derived from insulin-secreting β cells, commonly called insulinomas; these are characterised by high insulin secretion causing hypoglycemia and clinical signs such as seizures,tremors, weakness, and polyphagia, among others. In dogs, this tumour represents <0.5% of neoplasias; the majority aresolitary carcinoma masses and rarely adenomas. Insulin-secreting tumours are usually diagnosed in middle-aged or olderdogs. There is no apparent sex predilection for the disease and it has been mainly reported in medium to large breeds.Independently of whether they are adenomas or carcinomas, dogs have the same disease-free time and survival time andthe prognosis is poor.Case: An 8-year-old female Boxer was brought to the University Veterinary Hospital with a history of weakness, tremors,and generalised convulsions. Physical examination, CBC and urinalysis revealed no abnormalities. In the blood chemistryprofile, hypoglycemia was detected along with hyperinsulinemia. An abdominal ultrasound revealed the presence of twoabnormal masses located in the pancreas. The insulin:glucose ratio was 59.8. Exploratory celiotomy was performed andtwo masses were located in the mesentery, adjacent to the left pancreatic lobe, and a third was in the pancreatic tissue ofthe same lobule. All masses were resected during the same surgery. Cytology of the masses coincided with apparentlymalignant insulinoma, however, the histopathological and immunohistochemically report indicated an insulin-secretingadenoma. The patient improved clinically and remained stable for approximately 545 days, after which seizures relapsedand a new treatment was not approved. The patient died 575 days after surgery.Discussion: In dogs, pancreatic islet cell tumours correspond to endocrinologically active neoplasm that secrete hormonesand are associated with functional disorders (hyperinsulinemia) in relation to hypoglycemia...(AU)

Ação do flavonóide naringina sobre a secreção de insulina em células ß pancreáticas BRINBD11,justifica seu emprego em suplementaçãonutricional para animais / Action of flavonoid naringin on insulin secretion in pancreatic B cells, justifies its use in nutritional supplements for animals

A domesticação de cães e gatos transformou caçadores de presas protéicas em sedentários com dietasde alto teor energético que demandam maior produção de insulina pelas células β pâncreáticas,resultando em falência destas e consequente desenvolvimento do diabetes mellitus tipo II. O flavonoidenaringina pode influenciar na secreção de insulina, quer por suas propriedades antioxidantesou por seus efeitos de modulação de cascatas intracelulares e da expressão gênica, porém os estudossobre este relevante papel são escassos. O presente trabalho teve como objetivo investigar o efeitoinsulinotrópico sinérgico a glicose do flavonoide naringina em células da linhagem BRIN-BD11, umtipo celular híbrido de células β pancreáticas e insulinoma de rato o qual apresenta efetiva respostasecretória à glicose. Observou-se uma tendência ao aumento da atividade secretória destas células tratadascom naringina, que foi avaliada pela quantificação da insulina nos sobrenadantes dos cultivosempregando-se radioimunoensaio. Todavia faz-se necessária maior investigação para comprovaçãodos resultados, bem como elucidação dos mecanismos envolvidos e, por conseguinte, indicação deuso de dietas suplementadas com flavonoides para animais diabéticos.(AU)

Taming dogs and cats transformed protein prey`s hunters in sedentary high drifted energy whichdemand more insulin output by β cells, it ensue in β cells fault and diabetes II development. Besidesan antioxidant role, the flavonoids may influence insulin secretion by regulation of intracellular pathwaysignaling and gene expression. The present work consist on assessment of the protective effectof flavonoids naringin in pancreatic β cells. BRIN-BD11 cells is a useful model of clonal pancreatic βcell insulin secretion for studies with stability in culture. Insulin concentrations were mensured byradioimmoassay. Treatment with naringin appeared to be beneficial for the increasing of the cellssecretory activity. Thus, further studies are required to determine possible properties of flavonoids ininsulin secretion by β cells in vivo and its indication in diabetics animals diets.(AU)

Ação do flavonóide naringina sobre a secreção de insulina em células ß pancreáticas BRINBD11,justifica seu emprego em suplementaçãonutricional para animais / Action of flavonoid naringin on insulin secretion in pancreatic B cells, justifies its use in nutritional supplements for animals

A domesticação de cães e gatos transformou caçadores de presas protéicas em sedentários com dietasde alto teor energético que demandam maior produção de insulina pelas células β pâncreáticas,resultando em falência destas e consequente desenvolvimento do diabetes mellitus tipo II. O flavonoidenaringina pode influenciar na secreção de insulina, quer por suas propriedades antioxidantesou por seus efeitos de modulação de cascatas intracelulares e da expressão gênica, porém os estudossobre este relevante papel são escassos. O presente trabalho teve como objetivo investigar o efeitoinsulinotrópico sinérgico a glicose do flavonoide naringina em células da linhagem BRIN-BD11, umtipo celular híbrido de células β pancreáticas e insulinoma de rato o qual apresenta efetiva respostasecretória à glicose. Observou-se uma tendência ao aumento da atividade secretória destas células tratadascom naringina, que foi avaliada pela quantificação da insulina nos sobrenadantes dos cultivosempregando-se radioimunoensaio. Todavia faz-se necessária maior investigação para comprovaçãodos resultados, bem como elucidação dos mecanismos envolvidos e, por conseguinte, indicação deuso de dietas suplementadas com flavonoides para animais diabéticos.

Taming dogs and cats transformed protein prey`s hunters in sedentary high drifted energy whichdemand more insulin output by β cells, it ensue in β cells fault and diabetes II development. Besidesan antioxidant role, the flavonoids may influence insulin secretion by regulation of intracellular pathwaysignaling and gene expression. The present work consist on assessment of the protective effectof flavonoids naringin in pancreatic β cells. BRIN-BD11 cells is a useful model of clonal pancreatic βcell insulin secretion for studies with stability in culture. Insulin concentrations were mensured byradioimmoassay. Treatment with naringin appeared to be beneficial for the increasing of the cellssecretory activity. Thus, further studies are required to determine possible properties of flavonoids ininsulin secretion by β cells in vivo and its indication in diabetics animals diets.