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Uemura T, Nishimoto M, Eriguchi M, Tamaki H, Tasaki H, Furuyama R, Fukata F, Kosugi T, Morimoto K, Matsui M, Samejima KI, Tsuruya K. Utility of serum β2-microglobulin for prediction of kidney outcome among patients with biopsy-proven diabetic nephropathy. Diabetes Obes Metab 2024; 26:583-591. [PMID: 37921072 DOI: 10.1111/dom.15347] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/19/2023] [Revised: 10/05/2023] [Accepted: 10/15/2023] [Indexed: 11/04/2023]
Abstract
AIM To examine whether serum β2-microglobulin (β2-MG) could improve the prediction performance for kidney failure with replacement therapy (KFRT) among patients with diabetic nephropathy (DN). METHODS Patients with biopsy-proven DN at Nara Medical University Hospital were included. The exposure of interest was log-transformed serum β2-MG levels measured at kidney biopsy. The outcome variable was KFRT. Multivariable Cox regression models and competing-risk regression models, with all-cause mortality as a competing event, were performed. Model fit by adding serum β2-MG levels was calculated using the Akaike information criterion (AIC). The net reclassification improvement (NRI) and integrated discrimination improvement (IDI) indexes were used to evaluate the improvement of predictive performance for 5-year cumulative incidence of KFRT by serum β2-MG levels. RESULTS Among 408 patients, 99 developed KFRT during a median follow-up period of 6.7 years. A higher serum β2-MG level (1-unit increase in log-transformed serum β2-MG level) was associated with a higher incidence of KFRT, even after adjustments for previously known clinical and histological risk factors (hazard ratio [95% confidence interval {CI}]: 3.30 [1.57-6.94] and subdistribution hazard ratio [95% CI]: 3.07 [1.55-6.06]). The addition of log-transformed serum β2-MG level reduced AIC and improved the prediction of KFRT (NRI and IDI: 0.32 [0.09-0.54] and 0.03 [0.01-0.56], respectively). CONCLUSIONS Among patients with biopsy-proven DN, serum β2-MG was an independent predictor of KFRT and improved prediction performance. In addition to serum creatinine, serum β2-MG should probably be measured for DN.
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Affiliation(s)
- Takayuki Uemura
- Department of Nephrology, Nara Medical University, Nara, Japan
| | | | | | - Hiroyuki Tamaki
- Department of Nephrology, Nara Medical University, Nara, Japan
| | - Hikari Tasaki
- Department of Nephrology, Nara Medical University, Nara, Japan
| | - Riri Furuyama
- Department of Nephrology, Nara Medical University, Nara, Japan
| | - Fumihiro Fukata
- Department of Nephrology, Yamatotakada Municipal Hospital, Nara, Japan
| | - Takaaki Kosugi
- Department of Nephrology, Nara Medical University, Nara, Japan
| | - Katsuhiko Morimoto
- Department of Nephrology, Nara Prefecture Seiwa Medical Center, Nara, Japan
| | - Masaru Matsui
- Department of Nephrology, Nara Medical University, Nara, Japan
- Department of Nephrology, Nara Prefecture General Medical Center, Nara, Japan
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Guo LC, Lv Z, Zhu T, He G, Hu J, Xiao J, Liu T, Yu S, Zhang J, Zhang H, Ma W. Associations between serum polychlorinated biphenyls, halogen flame retardants, and renal function indexes in residents of an e-waste recycling area. THE SCIENCE OF THE TOTAL ENVIRONMENT 2023; 858:159746. [PMID: 36306844 DOI: 10.1016/j.scitotenv.2022.159746] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/10/2022] [Revised: 10/22/2022] [Accepted: 10/22/2022] [Indexed: 06/16/2023]
Abstract
E-waste handling activities release large quantities of polychlorinated biphenyls (PCBs) and halogen flame retardants (HFRs) into the surrounding area, creating a high exposure risk for local residents. However, the possibility of PCBs and HFRs exposure contributing to renal injury has not been extensively studied. To fill this knowledge gap, we conducted an epidemiological analysis of adolescents and adults recruited from an e-waste recycling area and a control area. Some PCBs and HFRs compounds were statistically significantly associated with the levels of β2-microglobulin (β2-MG), blood urea nitrogen (BUN), serum creatinine (SCr), and uric acid, with thyroid hormone-related genes found to partly mediate these associations. The interactions of PCBs and HFRs with metals also influenced renal function indexes. Exposure to high concentrations of PCBs and HFRs resulted in higher levels of β2-MG and lower levels of BUN and SCr in the exposed group. As indicated by the elevated β2-MG levels, high exposure to PCBs and HFRs may increase the risk of early renal injury for adolescents. These findings help to clarify the impacts of PCBs and HFRs on renal function and highlight the need to protect the health of residents in regions impacted by e-waste handling activities.
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Affiliation(s)
- Ling-Chuan Guo
- State Key Laboratory of Environmental Criteria and Risk Assessment, State Environmental Protection Key Laboratory of Ecological Effect and Risk Assessment of Chemicals, Chinese Research Academy of Environmental Sciences, Beijing 100012, China
| | - Zhanlu Lv
- State Key Laboratory of Environmental Criteria and Risk Assessment, State Environmental Protection Key Laboratory of Ecological Effect and Risk Assessment of Chemicals, Chinese Research Academy of Environmental Sciences, Beijing 100012, China
| | - Tingting Zhu
- State Environmental Protection Key Laboratory of Drinking Water Source Management and Technology, Shenzhen Key Laboratory of Emerging Contaminants Detection and Control in Water Environment, Guangdong Engineering Research Center of Low Energy Sewage Treatment, Shenzhen Academy of Environmental Sciences, Shenzhen 518001, China
| | - Guanhao He
- School of Medicine, Jinan University, Guangzhou 510632, China
| | - Jianxiong Hu
- Guangdong Provincial Institute of Public Health, Guangdong Provincial Center for Disease Control and Prevention, Guangzhou 511430, China
| | - Jianpeng Xiao
- Guangdong Provincial Institute of Public Health, Guangdong Provincial Center for Disease Control and Prevention, Guangzhou 511430, China
| | - Tao Liu
- School of Medicine, Jinan University, Guangzhou 510632, China
| | - Shengbing Yu
- Guangdong Provincial Center for Disease Control and Prevention, Guangzhou 511430, China
| | - Jinliang Zhang
- State Key Laboratory of Environmental Criteria and Risk Assessment, State Environmental Protection Key Laboratory of Ecological Effect and Risk Assessment of Chemicals, Chinese Research Academy of Environmental Sciences, Beijing 100012, China
| | - Han Zhang
- State Key Laboratory of Environmental Criteria and Risk Assessment, State Environmental Protection Key Laboratory of Ecological Effect and Risk Assessment of Chemicals, Chinese Research Academy of Environmental Sciences, Beijing 100012, China
| | - Wenjun Ma
- School of Medicine, Jinan University, Guangzhou 510632, China.
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Comparison of inulin clearance with 2-h creatinine clearance in Japanese pediatric patients with renal disease: open-label phase 3 study of inulin. Clin Exp Nephrol 2021; 26:132-139. [PMID: 34562149 PMCID: PMC8770449 DOI: 10.1007/s10157-021-02133-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2021] [Accepted: 09/06/2021] [Indexed: 12/04/2022]
Abstract
Background There is no approved dosage and administration of inulin for children. Therefore, we measured inulin clearance (Cin) in pediatric patients with renal disease using the pediatric dosage and administration formulated by the Japanese Society for Pediatric Nephrology, and compared Cin with creatinine clearance (Ccr) measured at the same time. We examined to what degree Ccr overestimates Cin, using the clearance ratio (Ccr/Cin), and confirmed the safety of inulin in pediatric patients. Methods Pediatric renal disease patients aged 18 years or younger were enrolled. Inulin (1.0 g/dL) was administered intravenously at a priming rate of 8 mL/kg/hr (max 300 mL/hr) for 30 min. Next, patients received inulin at a maintenance rate of 0.7 × eGFR mL/min/1.73 m2 × body surface area (max 100 mL/hr) for 120 min. With the time the maintenance rate was initiated as a starting point, blood was collected at 30 and 90 min, while urine was collected twice at 60-min intervals. The primary endpoint was the ratio of Ccr to Cin (Ccr/Cin). Results Inulin was administered to 60 pediatric patients with renal disease; 1 patient was discontinued and 59 completed. The primary endpoint, Ccr/Cin, was 1.78 ± 0.52 (mean ± standard deviation). Regarding safety, five adverse events were observed in four patients (6.7%); all were non-serious. No adverse reactions were observed in this study. Conclusions The results in this study on the dosage and administration of inulin showed that inulin can safely and accurately determine GFR in pediatric patients with renal disease. ClinicalTrials.gov identifier NCT03345316.
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Haggard DE, Noyes PD, Waters KM, Tanguay RL. Transcriptomic and phenotypic profiling in developing zebrafish exposed to thyroid hormone receptor agonists. Reprod Toxicol 2018; 77:80-93. [PMID: 29458080 PMCID: PMC5878140 DOI: 10.1016/j.reprotox.2018.02.006] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2017] [Revised: 01/15/2018] [Accepted: 02/13/2018] [Indexed: 02/08/2023]
Abstract
There continues to be a need to develop in vivo high-throughput screening (HTS) and computational methods to screen chemicals for interaction with the estrogen, androgen, and thyroid pathways and as complements to in vitro HTS assays. This study explored the utility of an embryonic zebrafish HTS approach to identify and classify endocrine bioactivity using phenotypically-anchored transcriptome profiling. Transcriptome analysis was conducted on zebrafish embryos exposed to 25 estrogen-, androgen-, or thyroid-active chemicals at concentrations that elicited adverse malformations or mortality at 120 h post-fertilization in 80% of animals exposed. Analysis of the top 1000 significant differentially expressed transcripts and developmental toxicity profiles across all treatments identified a unique transcriptional and phenotypic signature for thyroid hormone receptor agonists. This unique signature has the potential to be used as a tiered in vivo HTS and may aid in identifying chemicals that interact with the thyroid hormone receptor.
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Affiliation(s)
- Derik E Haggard
- Department of Environmental and Molecular Toxicology, Oregon State University, Corvallis, OR, United States
| | - Pamela D Noyes
- Department of Environmental and Molecular Toxicology, Oregon State University, Corvallis, OR, United States; Current: National Center for Environmental Assessment, Office of Research and Development, U.S. Environmental Protection Agency, Washington, DC, United States
| | - Katrina M Waters
- Biological Sciences Division, Pacific Northwest National Laboratory, Richland, WA, United States
| | - Robert L Tanguay
- Department of Environmental and Molecular Toxicology, Oregon State University, Corvallis, OR, United States.
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Uemura O, Iwata N, Nagai T, Yamakawa S, Hibino S, Yamamoto M, Nakano M, Tanaka K. Influence of thyroid function on glomerular filtration rate and other estimates of kidney function in two pediatric patients. CEN Case Rep 2018; 7:169-173. [PMID: 29492844 DOI: 10.1007/s13730-018-0320-7] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2018] [Accepted: 02/20/2018] [Indexed: 10/17/2022] Open
Abstract
To determine the optimal method of evaluating kidney function in patients with thyroid dysfunction, this study compared the estimated glomerular filtration rate derived from serum creatinine, cystatin C, or β2-microglobulin with inulin or creatinine clearance in two pediatric patients, one with hypothyroidism and the other with hyperthyroidism. It was observed that the kidney function decreased in a hypothyroid child and enhanced in a hyperthyroid child, with their kidney function becoming normalized by treatment with drugs, which normalized their thyroid function. Kidney function cannot be accurately evaluated using cystatin C-based or β2-microglobulin-based estimated glomerular filtration rate in patients with thyroid dysfunction, as these tests overestimated glomerular filtration rate in a patient with hypothyroidism and underestimated glomerular filtration rate in a patient with hyperthyroidism, perhaps through a metabolic rate-mediated mechanism. In both our patients, 24-h urinary creatinine secretion was identical before and after treatment, suggesting that creatinine production is not altered in patients with thyroid dysfunction. Therefore, kidney function in patients with thyroid dysfunction should be evaluated using creatinine-based estimated glomerular filtration rate.
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Affiliation(s)
- Osamu Uemura
- Department of Pediatric Nephrology, Aichi Children's Health and Medical Center, 426 7-chome, Morioka-cho, Obu, Aichi, 474-8710, Japan. .,Department of Clinical Medicine, Japanese Red Cross Toyota College of Nursing, 12-33 Nanamagari, Hakusan-cho, Toyota, Aichi, 471-8565, Japan.
| | - Naoyuki Iwata
- Department of Pediatric Nephrology, Aichi Children's Health and Medical Center, 426 7-chome, Morioka-cho, Obu, Aichi, 474-8710, Japan
| | - Takuhito Nagai
- Department of Pediatric Nephrology, Aichi Children's Health and Medical Center, 426 7-chome, Morioka-cho, Obu, Aichi, 474-8710, Japan
| | - Satoshi Yamakawa
- Department of Pediatric Nephrology, Aichi Children's Health and Medical Center, 426 7-chome, Morioka-cho, Obu, Aichi, 474-8710, Japan
| | - Satoshi Hibino
- Department of Pediatric Nephrology, Aichi Children's Health and Medical Center, 426 7-chome, Morioka-cho, Obu, Aichi, 474-8710, Japan
| | - Masaki Yamamoto
- Department of Pediatric Nephrology, Aichi Children's Health and Medical Center, 426 7-chome, Morioka-cho, Obu, Aichi, 474-8710, Japan
| | - Masaru Nakano
- Department of Pediatric Nephrology, Aichi Children's Health and Medical Center, 426 7-chome, Morioka-cho, Obu, Aichi, 474-8710, Japan
| | - Kazuki Tanaka
- Department of Pediatric Nephrology, Aichi Children's Health and Medical Center, 426 7-chome, Morioka-cho, Obu, Aichi, 474-8710, Japan
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Javadi S, Asri-Rezaei S, Allahverdizadeh M. Interrelationship of βeta-2 microglobulin, blood urea nitrogen and creatinine in streptozotocin-induced diabetes mellitus in rabbits. VETERINARY RESEARCH FORUM : AN INTERNATIONAL QUARTERLY JOURNAL 2014; 5:7-11. [PMID: 25568686 PMCID: PMC4279662] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/18/2012] [Revised: 11/17/2013] [Accepted: 03/15/2014] [Indexed: 10/28/2022]
Abstract
Measurement of serum creatinine (Cr) and blood urea nitrogen (BUN) are used as indicators of glomerular filtration rate. The increased levels of these biomarkers are usually detectable at advanced stages of kidney complications. The aim of this study was to find the interrelationship of beta-2 microglobulin (β2M), BUN and Cr in streptozotocin (STZ)-induced diabetes mellitus in rabbits. Diabetes was induced by a single intraperitoneal (IP) injection of 65 mg kg(-1) of STZ in rabbits. The levels of serum insulin, glucose and three above mentioned biomarkers were measured one day before (day -1) and on days 1-3 after injection of STZ and continued weekly to the end of the experiment (12 weeks). A statistically significant increase of serum β2M, BUN, Cr and glucose levels, and a significant decrease of insulin levels were observed in diabetic animals. However, β2M levels increased as early as one day after STZ injection compared to Cr and BUN that elevated at day two, suggesting a probable diagnostic advantage of β2M over currently used biomarkers in diabetic related kidney complications.
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Affiliation(s)
- Shahram Javadi
- Correspondence: Shahram Javadi. DVM, PhD, Department of Clinical Sciences, Faculty of Veterinary Medicine, Urmia University, Urmia, Iran. E-mail:
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Kimmel M, Braun N, Alscher MD. Influence of Thyroid Function on Different Kidney Function Tests. ACTA ACUST UNITED AC 2012; 35:9-17. [DOI: 10.1159/000329354] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2010] [Accepted: 05/10/2011] [Indexed: 01/06/2023]
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Suher M, Koc E, Ata N, Ensari C. Relation of Thyroid Disfunction, Thyroid Autoantibodies, and Renal Function. Ren Fail 2009; 27:739-42. [PMID: 16350827 DOI: 10.1080/08860220500243338] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022] Open
Abstract
Fifty-eight patients with thyroid dysfunction were included, comparing 27 healthy subjects to evaluate the relationship between thyroid autoimmunity, thyroid functional status, and renal function. Regardless of clinical status, hypothyroidism was defined as T3-T4<normal limits and TSH>upper limit of normal, and hyperthyroidism was defined as T3-T4>normal limits and TSH <0.1 mcU/mL. In all participants, serum antithyroperoxidase level, serum antithyroglobulin level, creatinine clearance (CC), and urinary albumin excretion rate (UAER) in 24-h urine collections were measured. Of 85 persons, 41 patients ages 20 to 71 years (median; 44) had hypothyroidism, 17 patients ages 22 to 56 years (median; 32) had hyperthyroidism, and 27 subjects ages 20 to 67 years (median; 50) were normal. Regarding thyroid autoantibody positiveness, the positive group had a higher UAER than the negative group (30.2 mg/day, 20.8 mg/day, respectively; p=0.05). In hypothyroid patients, UAER was significantly higher than in hyperthyroid patients and control subjects (30.1 mg/day, 11.8 mg/day, 10.5 mg/day, respectively; p<0.001). In the hypothyroid population, with regard to UAER and CC, we could not find a significant difference between the thyroid autoantibody positive and negative groups. In view of CC, hypothyroid patients had significantly lower CC than the hyperthyroid group (79.0 mL/ min, 86.5 mL/min, respectively; p<0.01). A careful control of the renal function in thyroid diseases should be evaluated. Renal dysfunction seems to be secondary to hypothyroidism rather than thyroid autoimmunity.
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Affiliation(s)
- Murat Suher
- Department of Internal Medicine, Atatürk Teaching and Research Hospital, Ankara, Turkey.
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Algün E, Topal C, Oztürk M, Sekeroğlu MR, Durmuş A. Urinary beta-2 microglobulin in renal dysfunction associated with hypothyroidism. Int J Clin Pract 2004; 58:240-3. [PMID: 15117089 DOI: 10.1111/j.1368-5031.2004.0014.x] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/30/2022] Open
Abstract
Hypothyroidism is associated with a number of functional renal disorders primarily affecting water and salt handling. In this study, we aim to investigate functional renal disorders in overt and subclinical hypothyroidism. We utilised urinary beta-2 microglobulin (beta2M) as a sensitive marker of tubular dysfunction. Urinary beta2M excretion and tests for renal functions were repeated before and after T4 replacement therapy. Forty-four patients (28 with overt disease, 16 with subclinical disease) and 31 healthy control subjects were involved in the study. There was a significant increase in urinary beta2M in both overt and subclinical hypothyroidism (p < 0.05 in both). TSH levels were correlated with beta2M excretion. Effects of hypothyroidism on renal functions were readily reversible by 3 weeks of thyroid hormone replacement therapy. Urinary beta2M was a sensitive marker of renal tubular dysfunction associated with overt and subclinical hypothyroidism.
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Affiliation(s)
- E Algün
- Faculty of Medicine, Department of Endocrinology, Yüzüncü Yil Universitesi, Van, Turkey.
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Jayagopal V, Keevil BG, Atkin SL, Jennings PE, Kilpatrick ES. Paradoxical changes in cystatin C and serum creatinine in patients with hypo- and hyperthyroidism. Clin Chem 2003; 49:680-1. [PMID: 12651831 DOI: 10.1373/49.4.680] [Citation(s) in RCA: 73] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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Koukkou E, Panayiotidis P, Thalassinos N. Serum soluble interleukin-2 receptors as an index of the biological activity of thyroid hormones in hyperthyroidism. J Endocrinol Invest 1995; 18:253-7. [PMID: 7560805 DOI: 10.1007/bf03347809] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
In order to examine whether serum soluble Interleukin-2 Receptors (sIL-2R) could be used as a marker of the biological effects of the thyroid hormones, we measured the sIL-2R, sex hormone binding globulin and beta-2 microglobulin levels in thirty-three hyperthyroid patients (14 with Graves' disease, 17 with Toxic Nodular Goiter and 2 with toxic adenoma) before and during treatment with antithyroid drugs. We found that serum sIL-2R concentrations of the patients, at diagnosis, were significantly higher compared with normal controls (2424 +/- 1447 vs 459 +/- 184 U/ml). All hyperthyroid patients had sIL-2R levels > mean + 2SD of normal controls, with 28 of the 33 patients having sIL-2R concentrations higher than 1011 U/ml (mean + 3SD of normal controls). Only 15 patients had SHBG levels higher than 3SD above the mean for the normal controls and 28 had SHBG levels 2SD above the mean for the normal controls. Three of the 5 hyperthyroid patients with normal SHBG levels at presentation had abnormally high sIL-2R levels. In all patients sIL-2R levels decreased gradually during therapy down to normal levels when euthyroidism was achieved. A strong positive correlation was found between sIL-2R, SHBG and T3 and T4 concentrations. Serum B2-microglobulin (B2-m) levels were higher than the upper normal limit only in 9 patients, but a significant decrement was observed in all patients when euthyroidism was achieved. The above results indicate that serum sIL-2R levels could be a useful marker of the in vivo biological effects of the thyroid hormones on lymphocytes in hyperthyroid patients.
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Affiliation(s)
- E Koukkou
- Department of Endocrinology, Evangelismos Hospital, Athens, Greece
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Kochańska-Dziurowicz A, Starzewski JJ, Dunal W. Estimation of the value of serum beta 2-microglobulin concentration in the diagnosis of Hashimoto' disease. Clin Chim Acta 1995; 233:101-4. [PMID: 7758197 DOI: 10.1016/0009-8981(94)05974-w] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Affiliation(s)
- A Kochańska-Dziurowicz
- Department of Nuclear Medicine, Institute of Occupational Medicine and Environmental Health, Sosnowiec, Poland
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Iguaz F, Naval J, Borque L. Measurement of serum beta 2-microglobulin by a latex nephelometric immunoassay. Clin Biochem 1992; 25:245-9. [PMID: 1525979 DOI: 10.1016/0009-9120(92)80028-f] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
A rapid and simple technique for the measurement of beta 2-microglobulin on the Behring nephelometer was developed using a commercially available latex-anti beta 2-microglobulin. This is a fully automated assay and no pretreatment of sample is necessary. An excellent correlation with radioimmunoassay (r = 0.972) and time-resolved fluoroimmunoassay (r = 0.914) was obtained. Haemolysis, lipemia, bilirubin, and rheumatoid factor do not cause interference because of the high dilution of samples and the use of Fab fragments of the antibody. The analytical range extends from 0.6 to 10.7 mg/L. Between-run imprecision (CV) ranged from 6 to 8%.
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Affiliation(s)
- F Iguaz
- Laboratorio Central, Hospital San Millan, Logroño, Spain
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