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Krela-Kaźmierczak I, Michalak M, Wawrzyniak A, Szymczak A, Eder P, Łykowska-Szuber L, Kaczmarek-Ryś M, Drwęska-Matelska N, Skrzypczak-Zielińska M, Linke K, Słomski R. The c.29T>C polymorphism of the transforming growth factor beta-1 (TGFB1) gene, bone mineral density and the occurrence of low-energy fractures in patients with inflammatory bowel disease. Mol Biol Rep 2017; 44:455-461. [PMID: 28993955 DOI: 10.1007/s11033-017-4131-2] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2016] [Accepted: 09/19/2017] [Indexed: 01/12/2023]
Abstract
Gastrointestinal tract conditions are frequently associated with low bone mineral density and increased risk of fractures due to osteoporosis, the latter concerning particularly inflammatory bowel disease (IBD) patients. One of the candidate genes involved in osteoporosis is the transforming growth factor beta-1 (TGFB1) whose polymorphisms may be responsible for the development of this disease. The aim of this study was to analyse the frequency of TGFB1 polymorphic variants and determine the association between the c.29T>C TGFB1 polymorphism, and bone mineral density and fractures in IBD patients. The study subjects included 198 IBD patients [100 suffering from Crohn's disease (CD) and 98 from ulcerative colitis (UC)] and 41 healthy volunteers as a control group. Densitometric bone measurements were obtained using dual energy X-ray absorptiometry. The TGFB1 genotyping was conducted using restriction fragments length polymorphism. We conducted an analysis of genotype distribution's concordance with Hardy-Weinberg equilibrium. We found statistically significant differences in lumbar spine (L2-L4) and femoral neck BMD and T-scores between CD, UC and control subgroups. The distribution of TGFB1 polymorphic variants among CD and UC patients was concordant with Hardy-Weinberg equilibrium. There were no statistically significant differences in densitometric parameters (lumbar spine and femoral neck BMD, T-score, and Z-score) between carriers of different TGFB1 polymorphisms among IBD (CD and UC) patients nor among controls. We have found no statistically significant differences in the prevalence of low-energy fractures between groups of different TGFB1 polymorphic variant carriers. The allele dose effect, recessive effect and dominant effect analysis did not show an association between low-energy fractures and the TGFB1 polymorphisms among CD and UC patients. We have not observed an association between the c.29T>C TGFB1 polymorphic variant and the bone mineral density within the cancellous and cortical bones (L2-L4 and femoral neck, respectively), or the occurrence of fractures among the IBD patients and their family members.
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Affiliation(s)
- I Krela-Kaźmierczak
- Department of Gastroenterology, Human Nutrition and Internal Diseases, University of Medical Sciences, Przybyszewskiego Street 49, 60-355, Poznan, Poland.
| | - M Michalak
- Department of Computer Science and Statistics, University of Medical Sciences, Poznan, Poland
| | - A Wawrzyniak
- Department of Family Medicine, University of Medical Sciences, Poznan, Poland
| | - A Szymczak
- Department of Gastroenterology, Human Nutrition and Internal Diseases, University of Medical Sciences, Przybyszewskiego Street 49, 60-355, Poznan, Poland
| | - P Eder
- Department of Gastroenterology, Human Nutrition and Internal Diseases, University of Medical Sciences, Przybyszewskiego Street 49, 60-355, Poznan, Poland
| | - L Łykowska-Szuber
- Department of Gastroenterology, Human Nutrition and Internal Diseases, University of Medical Sciences, Przybyszewskiego Street 49, 60-355, Poznan, Poland
| | - M Kaczmarek-Ryś
- Department of Biochemistry and Biotechnology, Poznan University of Life Sciences, Poznan, Poland
| | | | - M Skrzypczak-Zielińska
- Department of Biochemistry and Biotechnology, Poznan University of Life Sciences, Poznan, Poland
| | - K Linke
- Department of Gastroenterology, Human Nutrition and Internal Diseases, University of Medical Sciences, Przybyszewskiego Street 49, 60-355, Poznan, Poland
| | - R Słomski
- Department of Biochemistry and Biotechnology, Poznan University of Life Sciences, Poznan, Poland
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