Iodine is an essential trace element for human health.The thyroid gland uses iodine for the synthesis of thyroid hormones.Most iodine comes from food and drinking water,and approximately 85%is excreted through the uri...Iodine is an essential trace element for human health.The thyroid gland uses iodine for the synthesis of thyroid hormones.Most iodine comes from food and drinking water,and approximately 85%is excreted through the urine.Therefore,urinary iodine content is an important indicator for judging the iodine nutrition level of a population[1].A thyroid nodule is a discrete mass resulting from the abnormal proliferation of thyroid cells.Iodine deficiency in the general population has dramatically diminished after implementing universal salt iodization(USI)policies.However,the incidence of thyroid nodules has been reported to be increasing following the implementation of USI,leading some to question the plausibility of USI.This data from Zhao et al.展开更多
A new method for the simultaneous determination of fluorine and iodine in urine by ion chromatography （IC） with electrochemical pretreatment has been developed. The pretreatment was performed in a novel electrochemi...A new method for the simultaneous determination of fluorine and iodine in urine by ion chromatography （IC） with electrochemical pretreatment has been developed. The pretreatment was performed in a novel electrochemical oxidationneutralization device （EOND）, in which iodide of the sample was oxidized to iodate and the alkaline digestion sample solution was neutralized. Under the optimized conditions, the limits of detection （LOD, S/N = 3） were 2.5 μg/L for fluoride and 20 μg/L for iodate, respectively. The recoveries were in the range of 93-102% for fluoride and 86-98% for iodate.展开更多
BACKGROUND This is the first documentation of a spontaneous and nonspecific chemical reaction of an iodinated contrast media with ammonium persulfate used in As3+-Ce4+catalytic spectrophotometry for urine iodine conce...BACKGROUND This is the first documentation of a spontaneous and nonspecific chemical reaction of an iodinated contrast media with ammonium persulfate used in As3+-Ce4+catalytic spectrophotometry for urine iodine concentration(UIC)detection.CASE SUMMARY We herein report an incidental case who had a dual source computed tomography examination for papillary thyroid carcinoma diagnosis.Serial spot urine specimens were collected during her hospitalization and were measured by As3+-Ce4+catalytic spectrophotometry on a Beckman Coulter AU5800.The reacted solutions were“brownish”,and the results showed extremely high iodine concentrations despite serial dilutions.The patient claimed no dietary habit of iodized salt or iodine-containing medical history,which strongly pointed to iodinated contrast media(ICM)via intravenous injection.Even with 0.01%ICM,its interruption is still profound on the desired urine iodine reaction with ammonium persulfate,leading to inaccurate UIC and possibly inappropriate treatment.CONCLUSION The following laboratory suggestions should be considered:(1)As3+-Ce4+catalytic spectrophotometry is only suitable for UIC measurement after confirmed ICM renal clearance;(2)A mass spectrometry-based method can be applied as an alternative during the ICM clearance period;and(3)The UIC baseline can be confirmed after ICM injection by consecutive detection for at least 2 mo.展开更多
Human intestinal tract contained a diverse number of microbial communities which performed a significant role in human health. The presence of gut microbiota was affected mainly by diet. Camel milk is the source of nu...Human intestinal tract contained a diverse number of microbial communities which performed a significant role in human health. The presence of gut microbiota was affected mainly by diet. Camel milk is the source of nutrition and provides all the essential nutrients for growth. It has great significance in the treatment of liver, spleen, and anemic infections. Camel urine has also many medical advantages. In this study we examined the effect of camel milk and urine and a mixture of both (milk + urine) on the growth of Gut microbiota using an in vivo animal model. Fresh fecal samples were collected before and after administration of the tested materials. After that, the microbial analysis was conducted via culturing, denaturing gradient gel electrophoresis and metabolic analysis via high-performance liquid chromatography (HPLC). The result indicated that the numbers of bacterial groups were increased after the first dose. Coliform group have significant increase when given a mix of milk and urine compared to control group with P < 0.05. Bifidobacterium group have significant increase in their number in the Milk and Mix groups compared to control group with P < 0.05. The concentration of Short-chain fatty acids in fecal samples was increased in Milk and Mix groups compared to control group. In conclusion, drinking camal milk, urine or a mix of both increased the growth of Gut microbiota.展开更多
This study was implemented at the University of Khartoum to investigate the protective effect of camel milk mixed with camel urine against alcohol-induced liver damage in Wistar albino rats. The reasons for combining ...This study was implemented at the University of Khartoum to investigate the protective effect of camel milk mixed with camel urine against alcohol-induced liver damage in Wistar albino rats. The reasons for combining camel milk and urine together are because that in Sudan this combination is used extensively in traditional medicine and they claimed that this combination cures a lot of diseases including liver disease and jaundice;25 Wister Albino rats of both sexes were brought and divided into 5 groups. Group 1 (control group) received normal saline, group 2 received ethanol 10% at dose of (0.5 g/100g body weight) and group 3 rats received Silymarin (5 mg/100g body weight) plus ethanol 10% (0.5 g/100g). Group 4 received a mixture of camel milk and urine (1:1) at the rate of 2 ml/100g and group 5 rats were administered with the mixture of camel’s milk and urine as in group 4 plus ethanol 10% (0.5 g/100g). All treatments given by an oral intubation, experiment lasts for 28 days, rats were euthanized, serum samples and liver sections obtained. Oral administration of 10% ethanol (0.5 g/100g) induced liver damage which was clear in group 2 in a form of generalized necrosis, fatty change and congestion, beside high elevation of serum enzymes (AST, ALT, and ALP). Giving camel’s milk and urine mixture to group 5 with ethanol 10% (0.5 g/100g), resulted in significant reduction of levels of serum enzymes (AST, ALT, and ALP) and in stabilization of serum metabolites (total protein, albumin and bilirubin). The degree of reduction was lower when significantly compared to (Silymarin + ethanol) group, and all results were verified by the histopathological changes. Hepatoprotective effects of camel’s milk and urine mixture were recorded and this could be attributed to antioxidant activity or to its chelate effects on toxicants. Drinking raw camel milk and urine mixture, it was used extensively in traditional medicine in Sudan and it was found safe without any ill effect.展开更多
Background: In the context of a nuclear reactor accident, thyroid is the main target organ of radioactive iodines. To avoid as much as possible thyroid disorders or even cancer development, it is recommended to admini...Background: In the context of a nuclear reactor accident, thyroid is the main target organ of radioactive iodines. To avoid as much as possible thyroid disorders or even cancer development, it is recommended to administer a single dose of potassium iodide to people at risk of exposure. Nevertheless, the Fukushima Dai-ichi disaster has pointed out many questions about the conditions of stable iodine prophylaxis implementation highlighting the need for reflection further revision of the actual “iodine doctrine”. Therefore, providing useful data is required notably through the implementation of animal experiments to strengthen current knowledge and to edit new recommendations. Methods: Urinary iodine constitutes a very good indicator to investigate the function of thyroid, its interpretation demands reliable analyses. Prior to perform animal experiments, two calibration methods were designed by our lab and compared together (standard addition and external calibration) to assess the urinary concentration of stable iodine in urine by ICP-MS. They were validated based on several key parameters especially linearity, accuracy and limits of detection (LOD) and quantification (LOQ). Results: The results were nicely satisfying. Indeed, both calibration methods have indicated very good coefficients of correlations, accuracies with low expanded relative uncertainties were obtained. The estimated LOD in the sample for standard addition method and external calibration were fully acceptable, 0.39 μg·L-1 and 0.35 μg·L-1, respectively. All performance criteria have been thus fulfilled successfully. The established methods were proven to be accurate, robust and sensitive. Once validated, both calibration methods were applied to rat urine samples and the results of z-score and Wilcoxon W test concluded that there were no statistically significant differences between both methods.展开更多
Objective This study was designed to evaluate the prevalence of thyroid nodules（TNs） and its relationship with urine iodine concentrations（UICs） after the regional rapid economic growth and lifestyle changes. Meth...Objective This study was designed to evaluate the prevalence of thyroid nodules（TNs） and its relationship with urine iodine concentrations（UICs） after the regional rapid economic growth and lifestyle changes. Methods A cross-sectional survey was conducted in the general population aged 15-69 years. A questionnaire regarding general and personal characteristics and relevant information was administered. Ultrasonography of the thyroid was performed, and serum triiodothyronine（T3）, tetraiodothyronine（T4）, serum thyroid stimulating hormone（TSH）, free triiodothyronine（FT3）, free tetraiodothyronine（FT4）, thyroglobulin antibody（Tg Ab）, thyroid peroxidase antibody（TPOAb）, and TSH receptor antibody（TRAb） levels were measured for each individual subject. Results The prevalence rates of TNs in the whole population, females and males were 27.76%, 34.04%, and 21.60%, respectively. The prevalence of multiple nodules increased with age, whereas the prevalence peaks differed between males and females. The median UICs in the whole population and females with non-TNs were higher than those of subjects with TNs（P=0.0035, P=0.0068）. The median UICs in subjects with a single TN were higher than those in subjects with multiple TNs（P=0.0164, P=0.0127）. The result showed a U-shaped curve relationship between UIC and prevalence of TNs. The prevalence of TNs was the lowest when the UIC was 140-400 μg/L. Conclusion The prevalence of TNs was nearly 30% and increased with age. The relationship between UIC and prevalence of TNs is U-shaped, with an increase in risk when the UIC was 〈140 μg/L and 〉400 μg/L. Very low or high UIC levels need attention and correction.展开更多
Objective This paper aims at establishing an inductively coupled plasma mass specrometry(ICP-MS)method for quantification and evaluation of iodine in human urine and serum in routine clinical laboratory.Methods This s...Objective This paper aims at establishing an inductively coupled plasma mass specrometry(ICP-MS)method for quantification and evaluation of iodine in human urine and serum in routine clinical laboratory.Methods This study was methodology validation research on iodine evaluation using ICP-MS.Ammonia,isopropanol and ultrapure water were mixed at certain ratio展开更多
基金sponsored by the Fujian Provincial Health Technology Project [2020CXA020]Fujian Provincial Natural Science Funding [2018J01120]
文摘Iodine is an essential trace element for human health.The thyroid gland uses iodine for the synthesis of thyroid hormones.Most iodine comes from food and drinking water,and approximately 85%is excreted through the urine.Therefore,urinary iodine content is an important indicator for judging the iodine nutrition level of a population[1].A thyroid nodule is a discrete mass resulting from the abnormal proliferation of thyroid cells.Iodine deficiency in the general population has dramatically diminished after implementing universal salt iodization(USI)policies.However,the incidence of thyroid nodules has been reported to be increasing following the implementation of USI,leading some to question the plausibility of USI.This data from Zhao et al.
文摘A new method for the simultaneous determination of fluorine and iodine in urine by ion chromatography （IC） with electrochemical pretreatment has been developed. The pretreatment was performed in a novel electrochemical oxidationneutralization device （EOND）, in which iodide of the sample was oxidized to iodate and the alkaline digestion sample solution was neutralized. Under the optimized conditions, the limits of detection （LOD, S/N = 3） were 2.5 μg/L for fluoride and 20 μg/L for iodate, respectively. The recoveries were in the range of 93-102% for fluoride and 86-98% for iodate.
基金Supported by the“The Six Top Talent Project”of Jiangsu Province,No.WSW-004the Key Laboratory for Laboratory Medicine of Jiangsu Province of China,No.ZDXKB2016005。
文摘BACKGROUND This is the first documentation of a spontaneous and nonspecific chemical reaction of an iodinated contrast media with ammonium persulfate used in As3+-Ce4+catalytic spectrophotometry for urine iodine concentration(UIC)detection.CASE SUMMARY We herein report an incidental case who had a dual source computed tomography examination for papillary thyroid carcinoma diagnosis.Serial spot urine specimens were collected during her hospitalization and were measured by As3+-Ce4+catalytic spectrophotometry on a Beckman Coulter AU5800.The reacted solutions were“brownish”,and the results showed extremely high iodine concentrations despite serial dilutions.The patient claimed no dietary habit of iodized salt or iodine-containing medical history,which strongly pointed to iodinated contrast media(ICM)via intravenous injection.Even with 0.01%ICM,its interruption is still profound on the desired urine iodine reaction with ammonium persulfate,leading to inaccurate UIC and possibly inappropriate treatment.CONCLUSION The following laboratory suggestions should be considered:(1)As3+-Ce4+catalytic spectrophotometry is only suitable for UIC measurement after confirmed ICM renal clearance;(2)A mass spectrometry-based method can be applied as an alternative during the ICM clearance period;and(3)The UIC baseline can be confirmed after ICM injection by consecutive detection for at least 2 mo.
文摘Human intestinal tract contained a diverse number of microbial communities which performed a significant role in human health. The presence of gut microbiota was affected mainly by diet. Camel milk is the source of nutrition and provides all the essential nutrients for growth. It has great significance in the treatment of liver, spleen, and anemic infections. Camel urine has also many medical advantages. In this study we examined the effect of camel milk and urine and a mixture of both (milk + urine) on the growth of Gut microbiota using an in vivo animal model. Fresh fecal samples were collected before and after administration of the tested materials. After that, the microbial analysis was conducted via culturing, denaturing gradient gel electrophoresis and metabolic analysis via high-performance liquid chromatography (HPLC). The result indicated that the numbers of bacterial groups were increased after the first dose. Coliform group have significant increase when given a mix of milk and urine compared to control group with P < 0.05. Bifidobacterium group have significant increase in their number in the Milk and Mix groups compared to control group with P < 0.05. The concentration of Short-chain fatty acids in fecal samples was increased in Milk and Mix groups compared to control group. In conclusion, drinking camal milk, urine or a mix of both increased the growth of Gut microbiota.
文摘This study was implemented at the University of Khartoum to investigate the protective effect of camel milk mixed with camel urine against alcohol-induced liver damage in Wistar albino rats. The reasons for combining camel milk and urine together are because that in Sudan this combination is used extensively in traditional medicine and they claimed that this combination cures a lot of diseases including liver disease and jaundice;25 Wister Albino rats of both sexes were brought and divided into 5 groups. Group 1 (control group) received normal saline, group 2 received ethanol 10% at dose of (0.5 g/100g body weight) and group 3 rats received Silymarin (5 mg/100g body weight) plus ethanol 10% (0.5 g/100g). Group 4 received a mixture of camel milk and urine (1:1) at the rate of 2 ml/100g and group 5 rats were administered with the mixture of camel’s milk and urine as in group 4 plus ethanol 10% (0.5 g/100g). All treatments given by an oral intubation, experiment lasts for 28 days, rats were euthanized, serum samples and liver sections obtained. Oral administration of 10% ethanol (0.5 g/100g) induced liver damage which was clear in group 2 in a form of generalized necrosis, fatty change and congestion, beside high elevation of serum enzymes (AST, ALT, and ALP). Giving camel’s milk and urine mixture to group 5 with ethanol 10% (0.5 g/100g), resulted in significant reduction of levels of serum enzymes (AST, ALT, and ALP) and in stabilization of serum metabolites (total protein, albumin and bilirubin). The degree of reduction was lower when significantly compared to (Silymarin + ethanol) group, and all results were verified by the histopathological changes. Hepatoprotective effects of camel’s milk and urine mixture were recorded and this could be attributed to antioxidant activity or to its chelate effects on toxicants. Drinking raw camel milk and urine mixture, it was used extensively in traditional medicine in Sudan and it was found safe without any ill effect.
基金partly supported by the French National“Investment for the future”funding programme.
文摘Background: In the context of a nuclear reactor accident, thyroid is the main target organ of radioactive iodines. To avoid as much as possible thyroid disorders or even cancer development, it is recommended to administer a single dose of potassium iodide to people at risk of exposure. Nevertheless, the Fukushima Dai-ichi disaster has pointed out many questions about the conditions of stable iodine prophylaxis implementation highlighting the need for reflection further revision of the actual “iodine doctrine”. Therefore, providing useful data is required notably through the implementation of animal experiments to strengthen current knowledge and to edit new recommendations. Methods: Urinary iodine constitutes a very good indicator to investigate the function of thyroid, its interpretation demands reliable analyses. Prior to perform animal experiments, two calibration methods were designed by our lab and compared together (standard addition and external calibration) to assess the urinary concentration of stable iodine in urine by ICP-MS. They were validated based on several key parameters especially linearity, accuracy and limits of detection (LOD) and quantification (LOQ). Results: The results were nicely satisfying. Indeed, both calibration methods have indicated very good coefficients of correlations, accuracies with low expanded relative uncertainties were obtained. The estimated LOD in the sample for standard addition method and external calibration were fully acceptable, 0.39 μg·L-1 and 0.35 μg·L-1, respectively. All performance criteria have been thus fulfilled successfully. The established methods were proven to be accurate, robust and sensitive. Once validated, both calibration methods were applied to rat urine samples and the results of z-score and Wilcoxon W test concluded that there were no statistically significant differences between both methods.
基金supported by Shanghai Municipal health Bureau(number 20134332)the research grants of the Shanghai Municipal Bureau of Health(number 20134053)+3 种基金Health Fields Specific Research Grant(201202012)the Major Project of Shanghai Municipal Science and Technology Commission(11DJ1400202)the four grants from Key Discipline of Shanghai Public Health-Food and Nutrition Sciences(12GWZX0702)Shanghai Rising-Star Program(15YF1411100)
文摘Objective This study was designed to evaluate the prevalence of thyroid nodules（TNs） and its relationship with urine iodine concentrations（UICs） after the regional rapid economic growth and lifestyle changes. Methods A cross-sectional survey was conducted in the general population aged 15-69 years. A questionnaire regarding general and personal characteristics and relevant information was administered. Ultrasonography of the thyroid was performed, and serum triiodothyronine（T3）, tetraiodothyronine（T4）, serum thyroid stimulating hormone（TSH）, free triiodothyronine（FT3）, free tetraiodothyronine（FT4）, thyroglobulin antibody（Tg Ab）, thyroid peroxidase antibody（TPOAb）, and TSH receptor antibody（TRAb） levels were measured for each individual subject. Results The prevalence rates of TNs in the whole population, females and males were 27.76%, 34.04%, and 21.60%, respectively. The prevalence of multiple nodules increased with age, whereas the prevalence peaks differed between males and females. The median UICs in the whole population and females with non-TNs were higher than those of subjects with TNs（P=0.0035, P=0.0068）. The median UICs in subjects with a single TN were higher than those in subjects with multiple TNs（P=0.0164, P=0.0127）. The result showed a U-shaped curve relationship between UIC and prevalence of TNs. The prevalence of TNs was the lowest when the UIC was 140-400 μg/L. Conclusion The prevalence of TNs was nearly 30% and increased with age. The relationship between UIC and prevalence of TNs is U-shaped, with an increase in risk when the UIC was 〈140 μg/L and 〉400 μg/L. Very low or high UIC levels need attention and correction.
文摘Objective This paper aims at establishing an inductively coupled plasma mass specrometry(ICP-MS)method for quantification and evaluation of iodine in human urine and serum in routine clinical laboratory.Methods This study was methodology validation research on iodine evaluation using ICP-MS.Ammonia,isopropanol and ultrapure water were mixed at certain ratio
