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International Urology and Nephrology

, Volume 51, Issue 1, pp 79–83 | Cite as

The creatinine/cystatin C ratio provides effective evaluation of muscle mass in kidney transplant recipients

  • Masaaki YanishiEmail author
  • Hidefumi Kinoshita
  • Hiroyasu Tsukaguchi
  • Yutaka Kimura
  • Yuya Koito
  • Motohiko Sugi
  • Tadashi Matsuda
Urology - Original Paper
  • 61 Downloads

Abstract

Introduction

Measuring muscle mass is an important step in detecting sarcopenia. The evaluation of sarcopenia is also important for kidney transplant recipients. Methods for estimating muscle mass have been established using computed tomography or magnetic resonance imaging, which are considered the gold standards. But these methods are invasive and costly, and there is a need for a more practical and simple method using blood samples from kidney transplant recipients.

Methods

The study population was 62 patients who underwent kidney transplantation at Kansai Medical University Hospital, and were evaluated from August to October 2017. Muscle mass was measured using dual-energy X-ray absorptiometry. Serum creatinine and cystatin C levels were measured by immunoassay.

Results

We analyzed 62 transplant recipients who met the inclusion criteria (20 females and 42 males, mean age of 45.6 ± 12.7 years). The creatinine/cystatin C ratio in the male group was > 1, whereas the creatinine/cystatin C ratio in the female group was < 1. Muscle mass was significantly larger in the male group than the female group. There was a significant positive correlation between the skeletal muscle index and creatinine/cystatin C ratio in the male (r = 0.553; p < 0.001) and female groups (r = 0.675; p < 0.001).

Conclusion

The creatinine/cystatin C ratio is appropriate for evaluating muscle mass in kidney transplant recipients.

Keywords

Muscle mass Cystatin C Creatinine Kidney transplantation 

Abbreviations

CT

Computed tomography

MRI

Magnetic resonance imaging

DXA

Dual energy X-ray absorptiometry

BIA

Bioelectrical impedance analysis

GFR

Estimate glomerular filtration rate

BMI

Body mass index

SMM

Skeletal muscle mass

SMI

Skeletal muscle mass index

Notes

Acknowledgements

This study was supported by Mitsui Life Social Welfare Foundation. We thank Charles Allan, PhD, from Edanz Group (http://www.edanzediting.com/ac) for editing a draft of this manuscript.

Compliance with ethical standards

Conflict of interest

The authors have declared that no conflict of interest exists.

Informed consent

Informed consent was obtained from all individual participants included in the study.

Research involving human participants and/or animals

The Institutional Review Board of Kansai Medical University (IRB approval number: H150926) approved the study protocol, which was performed in accordance with the Declaration of Helsinki. This study is registered with the University Hospital Medical Information Network (ID: UMIN000019153).

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Copyright information

© Springer Nature B.V. 2018

Authors and Affiliations

  1. 1.Department of Urology and AndrologyKansai Medical UniversityOsakaJapan
  2. 2.2nd Department of Internal Medicine, Division of NephrologyKansai Medical UniversityOsakaJapan
  3. 3.Health Science CenterKansai Medical UniversityOsakaJapan
  4. 4.Department of Urology and Andrology, Graduate School of MedicineKansai Medical UniversityHirakataJapan

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