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Gene & Protein in Disease                                      Gene polymorphism and chronic kidney disease




            Table 5. Association of CCR2 genotype with the causes of chronic kidney disease
            Causes                                                      Genotype                 Chi‑square test
                                                                 GA                GG
                                                             n        %        n       %
            Diabetic nephropathy (N=40)                      21      70.0      19      59.4      χ =1.400; P=0.706
                                                                                                  2
            Autosomal dominant polycystic kidney disease (ADPKD) (N=2)  1  3.3  1      3.1
             Glomerulonephritis (N=7)                        2        6.7      5       15.6
            Hypertensive nephrosclerosis (N=13)              6       20.0      7       21.9
            Notes: The Chi-square (χ ) test was used to determine the association of the CCR2 genotype with causes of CKD. P<0.05 indicates a statistically
                            2
            significant difference.
            Table 6. Association of CCR2 genotype with renal function parameters

            Parameters                      GA                        GG                      Student’s t‑test
                                     Mean         SD           Mean          SD           t              P
            Urea (mg/dL)             104.82       69.04        64.28        45.83        3.859         < 0.001
            Creatinine (mg/dL)       6.96         5.43         3.69          3.46        4.043         < 0.001
            eGFR (mL/min/1.73 m )    45.00        45.66        58.80        39.53        −1.708        0.090
                           2
            Spot urine (mg/g)        212.18      191.86        84.84        116.13       4.559         < 0.001
            Notes: Student’s -test was used to determine the association of the CCR2 genotype with renal function parameters. P<0.05 indicates a statistically
            significant difference. Abbreviations: eGFR: Estimated glomerular filtration rate; SD: Standard deviation.

            Table 7. Association of CCR2 gene (rs1799864) with the   identify the role of polymorphisms in various genes and
            stages of chronic kidney disease (CKD) in the CKD group  their implications for genetic predisposition to CKD in a
                                                               larger patient population, enhancing our understanding of
            Stage (N=62)            GA    GG   Chi‑square test  the genetic basis underlying CKD.
                                   n  %  n  %
            Non-ESRD (Grades 1–4) (n=34)  9 30.0 25 78.1  χ 14.480;   5. Conclusion
                                                  2=
            ESRD (Grade 5) (n=28)  21 70.0  7 21.9  P<0.001    The findings of the present study suggest a significant
            Notes: The Chi-square (χ ) test was used to determine the association   association between the  CCR2  GA genotype and CKD,
                            2
            of the CCR2 genotype with the stages of CKD. P<0.05 indicates a   along with deteriorating renal function and stages of renal
            statistically significant difference. Abbreviation: ESRD: End-stage renal   disease. While the G allele was more frequently observed
            disease.
                                                               overall, the A allele demonstrated a significant association
            to the reversible nature of epigenetic modifications, there   with CKD. Elevated levels of parameters indicating
            is a potential to halt or even reverse the disease process   deteriorating renal function (urea, creatinine,  and spot
            through targeted therapy .                         urine) were significantly associated with the GA genotype
                                [27]
                                                               of CCR2. These findings indicate that the GA genotype of
              The novelty of this study lies in the evaluation of the   CCR2 is associated with CKD, ESRD, severe albuminuria,
            association of CCR2 with causes, age of onset, and duration of   and renal dysfunction, but not with the causes or duration
            CKD, which were discovered to be comparable. The present   of CKD. However, the age of onset, duration, and
            study also explored the correlation of the stage of renal disease   causes  of  CKD  demonstrated  no  association  with  CCR2
            with CCR2, a facet with limited findings in contemporary   polymorphism in the North Indian population.
            studies, adding novelty to our research. However, a number
            of shortcomings exist in this study. First, the sample size   Acknowledgments
            might be considered small, with only 62 CKD patients and
            62 non-CKD controls. Second, selection bias was inevitable.   We would like to acknowledge the entire Medical and
            Third, our investigation was limited to the North Indian   Research staff and our Era’s Lucknow Medical College for
            population and did not encompass all regions. Therefore,   their support and contributions to this study.
            to validate our findings, further research with a larger   Funding
            sample size and a more diverse range of racial backgrounds
            is required. Ongoing experiments in our laboratory aim to   None.


            Volume 2 Issue 4 (2023)                         6                        https://doi.org/10.36922/gpd.2253
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