• Childhood Kidney Diseases
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• 제11권1호
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• pp.9-15
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• 2007

목적 : 부종은 신증후군 환아에서 대표적 특징중 하나로 발생 기전은 아직 완전하지는 않으나 대개 저혈량증과 과다혈량증 두 가지로 설명되고 있다. 적절한 부종의 치료를 위하여서는 환자의 혈량 상태를 평가하는 것은 매우 중요하나 임상적징후만으로는 적절한 평가가 어려운 경우가 있어 소변 칼륨/소변 칼륨+소변 나트륨 비를 측정하는 방법이 보다 유용한 방법으로 소개되어, 본 연구에서는 소아 신증후군 환아의 혈류량 평가에 이를 적용하여 그 효용성에 대한 연구를 시행하였다. 방법 : 1995년 1월부터 2005년 6월까지 영남대학교 의과대학 부속병원 소아과를 방문한 일차성신증후군 환아를 대상으로 전향적인 방법으로 소변 칼륨/소변 칼륨+소변 나트륨 비가 60% 이상인 경우를 저혈량증, 소변 칼륨/소변 칼륨+소변 나트륨 비가 60% 이하인 경우를 과다혈량증으로 분류하였다. 혈류량의 상태를 간접적으로 나타내는 심박동수 증가, 심비대, 흉막삼출 등의 임상적 징후와 혈액검사 및 요검사 등을 분석하였으며, 저혈량증인 경우는 알부민 및 이뇨제를 함께 사용하였으며 반면에 과다혈량증인 경우는 이뇨제만 투여하여 이뇨 효과 및 수분-전해질 이상 등의 부작용 동반 유무를 관찰하였다. 결과 :소변 칼륨/소변 칼륨+소변 나트륨 비에 따른 과다혈량증은 29례이고 저혈량증은 21례였다. 빈맥, 심비대, 흉막삼출 등의 임상적 징후와 FeNa를 제외한 혈액검사 및 소변검사에서 두 군의 차이는 없었다. FeNa와 소변 칼륨/소변 칼륨+소변 나트륨 비은 유의한 음의 상관관계를 보였으며 BUN과 소변 칼륨/소변 칼륨+소변 나트륨 비은 유의한 양의 상관관계를 보였다. 부종 치료후의 소변량은 두 군 모두 효과적으로 이뇨되었으며, 치료로 인한 수분-전해질 이상 등의 부작용은 없었다. 결론 : 신증후군의 부종에서 소변 칼륨/소변 칼륨+소변 나트륨 비로써 혈류량 평가하며 그에 따른 부종의 치료는 매우 유용하였으며, FeNa와 혈액요소질소도 혈류량의 의미있는 평가 지표로 사용될 수 있음을 보여주었다.

• 한국임상수의학회지
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• 제29권5호
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• pp.372-376
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• 2012

급성신손상은 높은 이환율과 치사율을 나타내는 심각한 질환이며, 허혈-재관류에 의한 신손상은 급성신손상의 중요한 원인이 된다. 본 연구는 미니돼지에서 급성신손상을 진단하는데 임상적으로 유용한 바이오마커를 찾아내기 위해 실시되었다. 세 마리의 미니돼지에서 60분간 신동맥을 결찰하여 양측성 신허혈을 유도하였다. 각 미니돼지에서 결찰 전, 결찰 후 0, 1, 3, 5일에 혈액 및 뇨 검체를 채취하였다. 혈청 및 뇨 검체에서 BUN, creatinine, 나트륨 및 요산을 측정한 후 나트륨 및 요산의 분획배설율($FE_{Na}$, $FE_{UA}$)을 산출하였다. 또한 IL-6, IL-18, L-FABA 및 GST를 Western immunoblotting을 실시하여 측정하였다. 결과에서 세 마리 미니돼지 모두 혈청 BUN과 creatinine 농도는 결찰 후 1일째에 유의적으로 증가하였다. 그러나 $FE_{Na}$와 $FE_{UA}$는 현저한 개체차를 보였다. 수술 전과 후를 비교했을 때 허혈 이후의 뇨 검체에서는 IL-6, IL-18, L-FABP 및 GST의 농도가 유의적으로 증가하였다. 결론적으로, $FE_{Na}$와 $FE_{UA}$에 대해서는 추가적인 연구가 필요하다고 생각되며, 혈청 BUN, creatinine과 뇨 IL-6, IL-18, L-FABP 및 GST는 돼지의 허혈-재관류 모델에서 다른 바이오마커와 함께 급성신손상을 진단하는 민감한 바이오마커가 될 수 있을 것이라 생각된다.

• The Korean Journal of Physiology
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• 제23권2호
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• pp.363-375
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• 1989

It has been well known that peripheral infusion of angiotensin II results in an increase of blood pressure, and an elevation of aldosterone secretion, and an inhibition of renin relase. However, the direct effect of angiotensin II on renal function has not been clearly established. In the present study, to investigate the effect of angiotensin II on renal function and renin release, angiotensin II (0.3, 3 and 10 ng/kg/min) was infused into a unilateral renal artery of the unanesthetized rabbit and changes in renal function and active and inactive renin secretion rate (ARSR, IRSR) were measured. In addition, to determine the relationship between the renal effect of angiotensin II and adenosine, the angiotensin II effect was evaluated in the presence of simultaneously infused 8-phenyltheophylline (8-PT, 30 nmole/min), adenosine A 1 receptor antagonist. Angiotensin II infusion at dose less than 10 ng/kg/min decreased urine flow, clearances of para-amino-hippuric acid and creatinine, and urinary excretion of electrolytes in dose-dependent manner. The changes in urine flow and sodium excretion were significantly correlated with the change in renal hemodynamics. Infusion of angiotensin II at 10 ng/kg/min also decreased ARSR, but it has no significant effect on IRSR. The change in ARSR was inversely correlated with the change in IRSR. The plasma concentration of catecholamine was not altered by an intarenal infusion of angiotensin II. In the presence of 8-PT in the infusate, the effect of angiotensin II on renal function was significantly attenuated, but that on renin secretion was not modified. These results suggest that the reduction in urine flow and Na excretion during intrarenal infusion of angiotensin II was not due to direct inhibitions of renal tubular transport systems, but to alterations of renal hemodynamics which may partly be mediated by the adenosine receptor.

• Nutrition Research and Practice
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• 제9권4호
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• pp.385-392
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• 2015

BACKGROUND/OBJECTIVES: Recent studies have reported an association of the angiotensin II type 2 receptor (AT2R) 3123Cytosine/Adenine (3123C/A) polymorphism with essential hypertension and cardiovascular diseases. The purpose of the study was to investigate whether the AT2R 3123C/A polymorphism affects blood pressure for free-living hypertensive men during a 5-month intervention period. SUBJECTS/METHODS: The subjects were free-living hypertensive Japanese men aged 40 to 75 years who agreed to intervention in the period from 2004 to 2011. Detection of the AT2R 3123C/A polymorphism was determined by polymerase chain reaction. The dietary intervention was designed to decrease salt level and to increase potassium level through cooking instructions and self-monitoring of the diet. The exercise session consisted of activities such as stretching, resistance training, and walking. Blood pressure, urinary sodium and potassium excretion, dietary and lifestyle data, and non-fasting venous blood sample were collected at baseline and after the intervention period. RESULTS: Thirty nine subjects were eligible for participation and the follow-up rate was 97.4%. The C allele proportion was 57.9%. AT2R 3123C/A polymorphism was X-chromosome-linked, therefore we analyzed the C and A genotypes. At baseline, no significant differences were observed between the genotype groups. After the intervention, there were no significant differences in lifestyle habit between the groups. Nevertheless, the estimated salt excretion (g/day) was significantly decreased only in the C genotype (13.0-10.3, P = 0.031). No significant change was observed in systolic blood pressure (SBP) (mmHg) in the A genotype, but a significant decrease was observed in the C genotype (150.0-141.5, P = 0.024). CONCLUSTIONS: In the C genotype, it might be easy to improve SBP through lifestyle intervention in free-living hypertensive Japanese men, however generalization could not be achieved by the small sample size.

• Asian Pacific Journal of Cancer Prevention
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• 제17권3호
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• pp.979-984
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• 2016

The incidence rate of stomach cancer in Bali, Indonesia, is estimated to be strikingly lower than that in Japan. We conducted an on-site ecological study to investigate the association between the stomach cancer incidence and Helicobacter pylori (H. pylori) infection. Recruiting 291 healthy persons (136 men and 155 women) from the general population in Bali, Indonesia, we conducted a urea breath test (UBT) to examine H. pylori infection, along with a pepsinogen test to detect chronic atrophic gastritis and urine analysis to estimate sodium and potassium excretion. UBT positivities were 9% (2-15, 95% confidence interval) for men and 7% (1-12) for women, and positive cases for H. pylori IgG antibodies were 1% (0-3) for men and 3% (0-5) for women, significantly lower than the respective values in Japan. Positive pepsinogen tests in Bali were 0% (0-0) for men and 1% (0-4) for women, also significantly lower than the Japanese figures. Computed values for daily salt excretion were $13.3{\pm}4.1g$ (mean${\pm}$SD) for men and $11.1{\pm}3.1g$ for women, as high as corresponding Japanese consumption values. Moreover, the estimated potassium excretion was $3.2{\pm}0.7g$ for men and $2.8{\pm}0.6g$ for women in Bali, significantly higher than the figures in Japan. There were no associations across genetic polymorphisms of IL-beta, TNF-alpha, and PTPN11 with UBT positivity. The low incidence of stomach cancer in Bali may thus mainly be due to the rare H. pylori infection. Namely, the bacterium infection seems to be a critical factor for gastric cancer rather than host or other environmental factors.

• The Korean Journal of Physiology
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• 제16권1호
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• pp.69-76
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• 1982

The effect of parathyroid hormone on calcium and phosphate metabolism have been widely investigated, however less attention has been paid to the effect on urinary excretion. This study was performed for the purpose determining urinary excretion of Na, K, Ca, and $Po_4$, of 18 thyroparathyroidectomized (TPTX) rabbits, which were TPTX previously 7 to 10 days compared with the same normal ones. After TPTX 0.2 mg/day of synthyroid was donated to the rabbits. The concentration of electrolytes in the serum and urine was determined by the following method; Na and K were determined by means of flame photometry, Ca was by EDTA titration $method^{19)}$, and $Po_4$ by Fiske and Subba-Raw $method^{20)}$. The results as follows. The concentrations of electrolytes in the serum were 1) In the normal control rabbits (N = 25) (data, $Mean{\pm}S.E.$) $Na\;131.72{\pm}1.33\;mEq/L$, $K\;3.59{\pm}0.28\;mEq/L$, $Ca\;12.58{\pm}0.29\;mg%$, $Po_4\;4.50{\pm}\;0.45mg%$. 2) In the TPTX rabbits(N= 18) $Na\;140.6l{\pm}2.56\;mEq/L$, $K\;3.38{\pm}0.36\;mEq/L$, $Ca\;l2.18{\pm}0.45\;mg%$, $Po_4\;3.92{\pm}\;0.35\;mg%$. There was no significant change between the normal and TPTX rabbits. The concentration of elelctrolytes in the urine were variously changed. 3) In the normal rabbits. $Na\;8.40{\pm}1.09\;mEq/L$, $K\;81.59{\pm}10.19\;mEq/L$, $Ca\;16.02{\pm}3.12\;mg%$, $Po_4\;13.16{\pm}2.89mg%$. 4) In the TPTX rabbits, $Na\;14.57{\pm}3.39\;mEq/L$ slight ncreased, $K\;116.06{\pm}12.77\;mEq/L$ significant increased (P<0.05), $Ca\;18.90{\pm}5.44\;mg%$ no significant increased, $Po_4\;43.38{\pm}8.67\;mg%$ significant increased (p<0.01). The effect of TPTX was assumed that it affected upon increasing tubular secretion of $K^+$ and inhibition of the tubular reabsorption of $Po_4$.

• Journal of Nutrition and Health
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• 제42권4호
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• pp.350-357
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• 2009

본 연구는 대구시 8개 병원과 사업체에 근무하는 직장인 251명을 대상으로 교육집단 166명, 비교육집단 85명으로 나누어 5주간 저염화 영양교육 프로그램을 운영하고 그 효과를 평가하였으며, 그 결과를 요약하면 다음과 같다. 1) 저염화 교육프로그램 실시 결과 교육전 두 집단간의 짠맛에 대한 미각판정치에 차이가 없었으나, 교육 후 교육집단의 경우 미각판정치가 유의하게 감소하였다 (p < 0.001). 또 한 교육 후 영양지식, 짜게 먹는 식태도 및 식행동이 비교육 집단에서는 유의한 차이가 없었으나 교육집단에서는 모두 유의하게 개선되었다 (p < 0.001). 2) 교육집단에서 24시간 소변 수집을 통한 나트륨 섭취량은 교육 전에 비해 교육 후 감소하였으나, 통계적으로 유의하지는 않았다. 3) 외식 빈도가 잦을수록, 외식비가 높을수록 짜게 먹는 경향이 있는 것으로 나타났으며, 미각판정치와 짜게 먹는 식행동 및 식태도간 유의한 상관관계를 나타내었다. 또한 짜게 먹는 식태도와 나트륨 섭취량간에 유의한 상관관계를 나타내어 식태도가 나쁠수록 나트륨 섭취량이 높은 것으로 나타났다.

• 농촌의학ㆍ지역보건
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• 제25권2호
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• pp.293-302
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• 2000

본 연구는 코호트내 환자-대조군 연구설계를 통하여 0.5% 소금물에 대한 역치와 위암발생 위험의 관련성을 구명하고자 수행되었다. 강화 코호트와 강화 암등록사업을 통하여 얻은 위암 환자군 90명, 지역사회대조군 141명을 대상으로 수집된 자료를 분석한 결과 두군간에 건강관련 변수들의 분포에 별 차이가 없었다. 다만 '주관적 건강수준'과 '동년배에 비교한 주관적 건강수준'에 차이가 있었다. Cox외 비례위험모형을 이용하여 '주관적 건강수준' 흡연, BMI 등 혼란변수를 통제하고 추정한 '0.5% 소금물을 싱겁다'고 느낀 군의 '그렇지 않다'고 느낀 군에 비한 위암의 상대위험도는 0.77로 통계적으로 유의한 수준이 아니었다(표4). 앞으로 이 분야에 대한 연구는 소금섭취량 측정수준의 상향조정은 물론, 매운 음식 섭취의 감안과 이 두변수의 교호작용등을 고려하되 환자 본인에게서 자료를 얻을 수 있는 병원내에서 수행하는 환자-대조군 연구를 수행함이 바람직하다고 생각한다.

• The Korean Journal of Physiology
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• 제21권2호
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• pp.291-296
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• 1987

There have been reports on the aberration of the control mechanisms of the blood pressure, hormone secretion, and renal functions in spontaneously hypertensive rats (SHR). However, the contribution of the renin-angiotensin system in the maintenance of high blood pressure in SHR is still controversial. Recently, it has been reported that the negative feedback short loop control mechanism of the renin-angiotensin system may be changed in SHR. In the present experiment, it was attempted to explore the possible alterations in the effect of arginine vasopressin (AVP) on the renal function in SHR. Experiments have been done in anesthetized SHR as well as in normotensive Wistar and Sprague-Dawley rats as control groups. Pharmacologic doses of AVP (10-13 mU/rat/10 min) decreased urine volume, excreted amount of creatinine and para-amino-hippuric acid. No differences in these parameters was observed between normotensive and hypertensive rats. AVP increased sodium and potassium excretion, but the responses in SHR were suppressed as compared with normotensive rats. Intravenous infusion of AVP also increased blood pressure in normotensive and hypertensive rats and a vasopressor effect of AVP was attenuated in SHR. There was a positive correlation between the changes in blood pressure and excreted amount of sodium during AVP infusion. These data suggest that the attenuated natriuretic effect of intravenous infusion of AVP may be due to a difference in renal tubular responsiveness to AVP but not due to a difference in vasopressor responsiveness.

• Asian-Australasian Journal of Animal Sciences
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• 제14권2호
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• pp.200-205
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• 2001

The effects of dietary supplementation with the sodium salt of isobutyric acid in a low protein (10% CP) wheat straw based diet on nutrient utilization, blood metabolites and growth performance were studied with male crossbred calves. The calves were divided into two equal groups of 6 each. The animals of the control group were fed a basal diet consisting of wheat straw, concentrate mixture and green oat fodder in 40:40:20 proportion whereas BCFA supplemented group received the basal diet+isobutyric acid at 0.75 percent of basal diet. The duration of study was 120 days. The feed intake between experimental groups did not differ significantly and the average total DMI (% BW) was 1.99 and $1.95kg\;day^{-1}$ in control and BCFA supplemented diets. The dietary supplementation of BCFA improved (p<0.01) the DM, OM, CP (p<0.05), NDF and cellulose digestibilities by 8.50, 9.01, 5.39, 17.78 and 18.44 per cent over those fed control diet. The total N retention on BCFA supplementation was improved (p<0.01) due to the decreased (p<0.05) faecal N excretion. The BCFA supplementation did not alter the blood circulatory levels of glucose, total protein, albumin, urea N and amino acids. However after 120 days of experimental feeding a significant (p<0.05) increase in the concentrations of non-esterified fatty acid was observed in control group. The DCP intake and the DCP content of experimental diets was similar in both groups. However, the TDN content of BCFA supplemented diet was significantly (p<0.01) higher (64.35%) than that of control (59.60%). The total live weight gain in BCFA supplemented diet increased by 15.94% over control. The average daily gain and efficiency of feed conversion were also improved in BCFA fed calves by 13.38 and 26.71% respectively, compared to control. It is concluded that dietary supplementation with isobutyric acid improved the digestibility of nutrients and growth performance of calves.