PMID- 28218436 OWN - NLM STAT- MEDLINE DCOM- 20180314 LR - 20221207 IS - 1872-8081 (Electronic) IS - 0951-6433 (Linking) VI - 43 IP - 3 DP - 2017 May 6 TI - Differentially expressed haptoglobin as a potential biomarker for type 2 diabetic mellitus in Hispanic population. PG - 424-433 LID - 10.1002/biof.1352 [doi] AB - Glycosylated hemoglobin (HbA1c) measurement is currently a primary tool for diagnosis of type 2 diabetes mellitus (T2DM), especially for the assessment of chronic hyperglycemia. However, many studies reported the limitation of using HbA1c for T2DM diagnosis/prognosis, such as poor sensitivities, difficult standardization, and variable cut points across ethnic groups. Therefore, the aim of this study was to discover novel biomarkers associated with elevated HbA1c levels as complementary T2DM diagnostic tools. Two-dimensional difference gel electrophoresis combined with mass spectrometry were applied for protein profile analyses of two pooled serum samples collected from Hispanic T2DM subjects (n = 74) with HbA1c >/=7 and HbA1c< 7, respectively. Isoforms of haptoglobin (Hp) alpha1/alpha2 chains were significantly altered in pooled serum samples from T2DM subjects with HbA1c >/=7 compared to those with HbA1c< 7. Hp genotypes of 262 Hispanic subjects, including 109 T2DM and 153 nondiabetic controls, were further determined by PCRs and western blotting analysis. Meanwhile, a new droplet digital PCR method for Hp genotyping was also established. The distribution of Hp2 allele was higher in T2DM subjects compared to nondiabetic controls and the HbA1c levels of T2DM subjects carrying at least one Hp2 allele tended to be higher than T2DM subjects with Hp 1-1. In summary, our results indicate that differentially expressed serum Hp protein isoforms could be associated with HbA1c levels and subjects with Hp2 allele have a higher risk for the occurrence of T2DM in Hispanic population. (c) 2016 BioFactors, 43(3):424-433, 2017. CI - (c) 2017 International Union of Biochemistry and Molecular Biology. FAU - Liu, Zhongwei AU - Liu Z AD - Department of Environmental Toxicology, The Institute of Environmental and Human Health, Texas Tech University, Lubbock, TX. FAU - Feng, Du AU - Feng D AD - School of Nursing, University of Nevada, Las Vegas, NV. FAU - Gu, Danshan AU - Gu D AD - Huafang College, Xuzhou Medical University, Xuzhou, China. FAU - Zheng, Richard AU - Zheng R AD - Department of Biology, Texas Tech University, Lubbock, TX. FAU - Esperat, Christina AU - Esperat C AD - School of Nursing, Texas Tech University Health Sciences Center, Lubbock, TX. FAU - Gao, Weimin AU - Gao W AD - Department of Environmental Toxicology, The Institute of Environmental and Human Health, Texas Tech University, Lubbock, TX. LA - eng PT - Journal Article DEP - 20170220 PL - Netherlands TA - Biofactors JT - BioFactors (Oxford, England) JID - 8807441 RN - 0 (Biomarkers) RN - 0 (Glycated Hemoglobin A) RN - 0 (HP protein, human) RN - 0 (Haptoglobins) RN - 0 (hemoglobin A1c protein, human) SB - IM MH - Adult MH - Aged MH - Alleles MH - Amino Acid Sequence MH - Biomarkers/blood MH - Case-Control Studies MH - Diabetes Mellitus, Type 2/*blood/*diagnosis/ethnology/genetics MH - Female MH - Gene Frequency MH - *Genotype MH - Glycated Hemoglobin/*genetics/metabolism MH - Haptoglobins/*genetics/metabolism MH - Hispanic or Latino MH - Humans MH - Male MH - Middle Aged MH - Polymorphism, Genetic MH - Proteomics/instrumentation/methods MH - Risk Factors MH - Sequence Alignment OTO - NOTNLM OT - HbA1c OT - Hispanic OT - droplet digital PCR OT - haptoglobin OT - type 2 diabetes mellitus EDAT- 2017/02/22 06:00 MHDA- 2018/03/15 06:00 CRDT- 2017/02/21 06:00 PHST- 2016/11/17 00:00 [received] PHST- 2017/01/06 00:00 [revised] PHST- 2017/01/17 00:00 [accepted] PHST- 2017/02/22 06:00 [pubmed] PHST- 2018/03/15 06:00 [medline] PHST- 2017/02/21 06:00 [entrez] AID - 10.1002/biof.1352 [doi] PST - ppublish SO - Biofactors. 2017 May 6;43(3):424-433. doi: 10.1002/biof.1352. Epub 2017 Feb 20.