Résumé
BACKGROUND: Peroxisome proliferator-activated receptor-gamma (PPAR-gamma) agonist has a wide-ranging influence on multiple components of metabolic syndrome. The Otsuka Long-Evans Tokushima Fatty (OLETF) rat is a useful animal model of metabolic syndrome. To determine genes related to metabolic syndrome, we examined overlapping genes that are simultaneously decreased by PPAR-gamma agonists and increased in OLETF rats using microarrays in two different models. METHODS: In the first microarray analysis, PPAR-gamma agonist-treated db/db mice were compared to standard diet-fed db/db mice. In the second microarray analysis, OLETF rats were compared to Long-Evans Tokushima Otsuka (LETO) rats (control of OLETF rats). RESULTS: Among the overlapping genes, in the present study, we validated that lipocalin-2 expression was significantly decreased in the visceral adipose tissue of PPAR-gamma agonist-treated db/db mice compared to standard diet-fed db/db mice and increased in OLETF rats compared to LETO rats using real time reverse transcription polymerase chain reaction. Furthermore, we showed for the first time that lipocalin-2 expression was significantly increased in the visceral adipose tissues of obese humans compared with nonobese humans. In addition, the expression level of lipocalin-2 in human visceral adipose tissue had a significant positive correlation with body mass index, serum interleukin-6, adipocyte fatty acid binding protein levels, and white blood cell count. CONCLUSION: Lipocalin-2 was confirmed to be a significant adipokine affected by PPAR-gamma agonist and obesity in the present study. Also, for the first time in human visceral adipose tissue, it was determined that the expression of lipocalin-2 from obese humans was significantly increased and correlated with circulating inflammatory markers.
Sujets)
Animaux , Humains , Souris , Rats , Adipocytes , Adipokines , Indice de masse corporelle , Protéines de transport , Gènes chevauchants , Interleukine-6 , Graisse intra-abdominale , Numération des leucocytes , Analyse sur microréseau , Modèles animaux , Obésité , Péroxysomes , Réaction de polymérisation en chaîne , Récepteur PPAR gamma , Rats de lignée OLETF , Transcription inverse , TranscriptomeRésumé
Wegener's granulomatosis (WG) classically consists of necrotizing granulomatous inflammation of the upper and/or lower respiratory tract, necrotizing glomerulonephritis, and an autoimmune necrotizing systemic vasculitis affecting predominantly small vessels. We report a case of WG with central nervous system (CNS) involvement. WG is being diagnosed through pulmonary nodule biopsy. A small nodular lesion in the left posterior basal ganglia of brain being highly suspicious for granulomatosis was detected by MRI. After IV pulse cyclophosphamide and oral corticosteroid treatment for over 4 months, clinical manifestations and CNS lesions in brain MRI is improved. WG might have multiple granulomatous lesions which could be misdiagnosed due to malignancy. CNS involvement in WG is rare but careful evaluation is necessary when there are suspicious symptoms or lesions in CNS.
Sujets)
Noyaux gris centraux , Biopsie , Encéphale , Système nerveux central , Cyclophosphamide , Glomérulonéphrite , Inflammation , Poumon , Tumeurs du poumon , Métastase tumorale , Appareil respiratoire , Vascularite systémique , Granulomatose avec polyangéiteRésumé
Terlipressin is a vasopressin analogue that is widely used in the treatment of hepatorenal syndrome or variceal bleeding. Because it acts mainly on splanchnic vessels, terlipressin has a lower incidence of severe ischemic complications than does vasopressin. However, it can still lead to serious complications such as myocardial infarction, skin necrosis, or bowel ischemia. Herein we report a case of severe ischemic bowel necrosis in a 46-year-old cirrhotic patient treated with terlipressin. Although the patient received bowel resection, death occurred due to ongoing hypotension and metabolic acidosis. Attention should be paid to patients complaining of abdominal pain during treatment with terlipressin.
Sujets)
Humains , Mâle , Adulte d'âge moyen , Bilirubine/sang , Créatinine/sang , Électrocardiographie , Issue fatale , Syndrome hépatorénal/traitement médicamenteux , Muqueuse intestinale/anatomopathologie , Intestins/chirurgie , Cirrhose du foie/diagnostic , Lypressine/effets indésirables , Nécrose/induit chimiquement , Tomodensitométrie , Vasoconstricteurs/effets indésirablesRésumé
Paraneoplastic leukocytosis was defined as elevated white blood cell (WBC) levels caused by cytokines, likely produced by the tumor itself, without evidence of infection or myeloproliferative disease. We report a case of anaplastic thyroid carcinoma with leukocytosis caused by elevated production of granulocyte colony-stimulating factor (G-CSF) by the carcinoma. Initially, acute pyelonephritis (APN) was diagnosed and treatment for APN was ongoing, but the WBC count steadily increased to 68.8x10(9)/L. She was diagnosed with anaplastic thyroid carcinoma on her neck mass, and the serum concentration of G-CSF was found to be markedly increased at 1,010 pg/mL. In spite of supportive care, the patient's condition rapidly deteriorated and the patient died on day 23 of hospital stay. Leukocytosis without definite evidence of infection could be a paraneoplastic manifestation in patients with malignant tumors, and paraneoplastic leukocytosis may be related to poor prognosis.
Sujets)
Humains , Cytokines , Facteur de stimulation des colonies de granulocytes , Granulocytes , Durée du séjour , Leucocytes , Hyperleucocytose , Cou , Pronostic , Pyélonéphrite , Glande thyroide , Tumeurs de la thyroïdeRésumé
Paraneoplastic leukocytosis was defined as elevated white blood cell (WBC) levels caused by cytokines, likely produced by the tumor itself, without evidence of infection or myeloproliferative disease. We report a case of anaplastic thyroid carcinoma with leukocytosis caused by elevated production of granulocyte colony-stimulating factor (G-CSF) by the carcinoma. Initially, acute pyelonephritis (APN) was diagnosed and treatment for APN was ongoing, but the WBC count steadily increased to 68.8x10(9)/L. She was diagnosed with anaplastic thyroid carcinoma on her neck mass, and the serum concentration of G-CSF was found to be markedly increased at 1,010 pg/mL. In spite of supportive care, the patient's condition rapidly deteriorated and the patient died on day 23 of hospital stay. Leukocytosis without definite evidence of infection could be a paraneoplastic manifestation in patients with malignant tumors, and paraneoplastic leukocytosis may be related to poor prognosis.
Sujets)
Humains , Cytokines , Facteur de stimulation des colonies de granulocytes , Granulocytes , Durée du séjour , Leucocytes , Hyperleucocytose , Cou , Pronostic , Pyélonéphrite , Glande thyroide , Tumeurs de la thyroïdeRésumé
Paraneoplastic limbic encephalitis (PLE) is a rare syndrome characterized by memory impairment, affective and behavioral disturbances and seizures. Among many different neoplasms known to cause PLE, small cell lung cancer (SCLC) is the most frequently reported. The pathogenesis is not fully understood but is believed to be autoimmune-related. We experienced a patient with typical clinical features of PLE. A 67-year-old man presented with seizure and disorientation. Brain magnetic resonance imaging demonstrated high signal intensity in the bilateral amygdala and hippocampus in flair and T2-weighted images suggestive of limbic encephalitis. Cerebrospinal fluid tapping revealed no evidence of malignant cells or infection. Positron emission tomography/computed tomography showed a lung mass with pleural effusion and a consequent biopsy confirmed the diagnosis of PLE associated with SCLC. The patient was subsequently treated with chemotherapy and neurologic symptoms gradually improved.