The electrogenic sodium/bicarbonate cotransporter 1 (NBCe1) on the basolateral side of the renal proximal tubule plays a pivotal role in systemic acid-base homeostasis. Mutations in the gene encoding NBCe1 cause severe proximal renal tubular acidosis accompanied by other extrarenal symptoms. The proximal tubule reabsorbs most of the sodium filtered in the glomerulus, contributing to the regulation of plasma volume and blood pressure. NBCe1 and other sodium transporters in the proximal tubule are regulated by hormones, such as angiotensin II and insulin. Angiotensin II is probably the most important stimulator of sodium reabsorption. Proximal tubule AT(1A) receptor is crucial for the systemic pressor effect of angiotensin II. In rodents and rabbits, the effect on proximal tubule NBCe1 is biphasic; at low concentration, angiotensin II stimulates NBCe1 via PKC/cAMP/ERK, whereas at high concentration, it inhibits NBCe1 via NO/cGMP/cGKII. In contrast, in human proximal tubule, angiotensin II has a dose-dependent monophasic stimulatory effect via NO/cGMP/ERK. Insulin stimulates the proximal tubule sodium transport, which is IRS2-dependent. We found that in insulin resistance and overt diabetic nephropathy, stimulatory effect of insulin on proximal tubule transport was preserved. Our results suggest that the preserved stimulation of the proximal tubule enhances sodium reabsorption, contributing to the pathogenesis of hypertension with metabolic syndrome. We describe recent findings regarding the role of proximal tubule transport in the regulation of blood pressure, focusing on the effects of angiotensin II and insulin.
Acidosis, Renal Tubular ; Angiotensin II ; Blood Pressure* ; Diabetic Nephropathies ; Homeostasis ; Humans ; Hypertension ; Insulin ; Insulin Resistance ; Kidney Tubules, Proximal ; Plasma Volume ; Rabbits ; Rodentia ; Sodium ; Sodium-Bicarbonate Symporters

OBJECTIVE: Traditional Japanese food appears to be healthy but contains a small amount of milk products. Type 2 diabetes (T2DM) patients commonly reduce their energy intake to control their blood glucose levels. However, nutritional guidance for diabetes does not emphasize calcium (Ca) consumption. The aim of this study is to estimate the nutritional status of Ca and other nutrients, which affect bone and Ca metabolism, in T2DM patients. METHODS: This observational study was conducted with Japanese T2DM patients (n = 96; M/F = 50/46; age: 61.6 ± 10.1 years). We estimated nutrient intake using a simple food frequency questionnaire. RESULTS: Median total energy intake was 1750 kcal/day (1440-1970). Their median daily intake of Ca, vitamin D, and vitamin K was 451 mg (336-560), 10.2 µg (8.5-12), and 206 µg (84-261), respectively. Only 17.7% of the study subjects were found to take more than 600 mg/day of Ca. Protein and salt intake was 78 (64-90) and 10.6 (9.3-12.2) g/day, respectively. Male subjects had more salt, less Ca and vitamin K than female. Daily Ca intake was positively associated with total energy, protein, and lipid intake but not with carbohydrates. Vitamin D intake correlated only with protein intake. CONCLUSION: The daily Ca intake of Japanese T2DM patients appears to be insufficient and could depend on protein and lipid intake. Additionally, these patients should have specific recommendations to ensure sufficient intake of Ca with protein and lipid during energy restriction.
Asian Continental Ancestry Group* ; Blood Glucose ; Calcium* ; Carbohydrates ; Energy Intake ; Female ; Humans ; Male ; Metabolism ; Milk ; Nutritional Status* ; Observational Study ; Vitamin D ; Vitamin K

A 36-year-old female with a high-grade fever and epigastric abdominal pain was prescribed antibiotics, but developed hypoxia and dyspnea. An echocardiography revealed diffuse hypokinesis and massive pericardial effusion, after which diagnostic cardiac catheterization and an endomyocardial biopsy (EMB) were peformed to reveal fibrosis and infiltration of inflammation cells composed primarily of neutrophils. Clinical manifestation of a spiking fever, leukocytosis, elevated ferritin levels, skin rash and EMB findings led to a diagnosis of adult-onset Still's disease (AOSD) with acute myocarditis. Pulse therapy of intravenous methylprednisolone was performed for three days, followed by a daily dose of prednisone (60 mg). After a course of steroid therapy for fever and pericardial effusion, and conducting a left ventricular ejection fraction, the patient showed improvement and was discharged asymptomatic within 32 days of admission. This study is the first to report on a case of myocarditis in AOSD diagnosed by neutrophil infiltration in the myocardium.
Abdominal Pain ; Adult ; Anoxia ; Anti-Bacterial Agents ; Biopsy* ; Cardiac Catheterization ; Cardiac Catheters ; Diagnosis ; Dyspnea ; Echocardiography ; Exanthema ; Female ; Ferritins ; Fever ; Fibrosis ; Heart Failure ; Humans ; Inflammation ; Leukocytosis ; Magnetic Resonance Imaging* ; Methylprednisolone ; Myocarditis* ; Myocardium ; Neutrophil Infiltration ; Neutrophils ; Pericardial Effusion ; Prednisone ; Still's Disease, Adult-Onset* ; Stroke Volume

OBJECTIVESThe present study aimed to define the framework of an environment conducive to the well-being of children with intellectually disability (CID).

METHODSA questionnaire composed of 31 items was developed through literature review. Then a 2-round Delphi survey was conducted with 3 different panels: health professionals (HPs), parents of CID, and teachers. The participants were asked to rate each item, select and rank the 10 most important items, and suggest additional ones.

RESULTSA total of 71 participants responded to the first round: 24 HPs, 22 parents, and 25 teachers. In the second round the overall response rate was 83%. At the end of the exercise, 12 items reached global consensus, i.e., in all groups. Only 5 items were ranked as most important by all groups: attitudes of family members at home; attitudes of HPs and teachers; support from family members at home; support at school (classmates and teachers); and government policies. Nevertheless, the panelists' views diverged on the remaining items. Several additional elements were suggested.

CONCLUSIONSThe views of HPs, teachers, and parents are complementary for the improvement of quality of life (QOL) of CID. The present findings will be used as a basis for the development of an instrument to assess the living environment of CID.

Medical students in Japan often want to do clinical rotations abroad. Preparation for these important clinical experiences is essential to maximize the learning opportunities. Language ability is only one small part of assuring success.1) It is important to consider the hospital where the rotation will take place, the specific rotation, the living arrangements and commuting to the hospital. Preparation before the rotation should include practice in performing and writing a complete patient history and physical examination.2) It is very helpful to have a cell phone while abroad, as well as a credit card. Students must bring a white coat, and it is recommended that they also bring a Japanese textbook in the field they will study.3) While on a clinical rotation, students must be active participants in patient care and in discussions. They must be aggressive about answering questions during ward rounds. Students must be aware of many cultural differences to have good relationships with patients and colleagues.

A 62-year-old woman with idiopathic thrombocytopenic purpura (ITP) was admitted to undergo cardiac surgery for aortic stenosis, angina pectoris, and paroxysmal atrial fibrillation. A bleeding tendency was expected due to the dramatic decrease in platelets during cardiopulmonary bypass. We performed high-dose transvenous gammaglobulin infusion (400mg/kg/day) for 5 consecutive days immediately before surgery. The gammaglobulin therapy caused steady increase of thrombocytes from 4 days after surgery, even though the platelet count showed no significant change preoperatively. The postoperative course was satisfactory with neither a bleeding tendency nor wound infection. High-dose transvenous gammaglobulin therapy is thus useful for perioperative patients with accompanying ITP, who are often under medication with steroids. This therapy is also effective for prevention of infection.

1. 5-HT inhibits spontaneous fluid secretion as well as stimulated secretion with secretin (cAMP mediated) or ACh (Ca2+ mediated) in the isolated guinea pig pancreatic ducts. 2. The inhibitory effect of 5-HT is reversible and is dependent on the concentration in the range 0.01-0.1 microM, which is much lower than those that affect intestinal motility and secretion. 3. The 5-HT3 receptor in duct cells appears to mediate the inhibitory effect of 5-HT. 4. [Ca2+]i is unlikely to mediate the inhibitory effect of 5-HT.
5-Methoxytryptamine/pharmacology ; Acetylcholine/pharmacology ; Animal ; Calcium/metabolism ; Guinea Pigs ; Pancreatic Ducts/metabolism* ; Pancreatic Ducts/drug effects ; Secretin/pharmacology ; Serotonin/pharmacology ; Serotonin/metabolism* ; Serotonin/analogs & derivatives* ; Vasodilator Agents/pharmacology

No abstract available.
Animal ; Bicarbonates/metabolism* ; Biological Transport/physiology ; Pancreatic Ducts/metabolism* ; Perfusion