Impact of the relationship between hemoglobin levels and renal interstitial fibrosis on long-term outcomes in type 2 diabetes with biopsy-proven diabetic nephropathy

BMC Nephrology - Tập 22 - Trang 1-12 - 2021
Miho Shimizu1,2, Kengo Furuichi3, Shinji Kitajima1, Tadashi Toyama1, Megumi Oshima1, Hisayuki Ogura1, Koichi Sato1, Shiori Nakagawa1, Yuta Yamamura1, Taro Miyagawa1, Akinori Hara4, Yasunori Iwata1, Norihiko Sakai1, Kiyoki Kitagawa5, Mitsuhiro Yoshimura6, Hitoshi Yokoyama3, Takashi Wada1
1Department of Nephrology and Laboratory Medicine, Graduate School of Medical Sciences, Kanazawa University, Kanazawa, Japan
2Health Service Center, Kanazawa University, Kanazawa, Japan
3Department of Nephrology, Kanazawa Medical University, Uchinada, Japan
4Department of Hygiene and Public Health, Graduate School of Medical Sciences, Kanazawa University, Kanazawa,, Japan
5Division of Internal Medicine, National Hospital Organization Kanazawa Medical Center, Kanazawa, Japan
6Division of Internal Medicine, Noto General Hospital, Nanao, Japan

Tóm tắt

Progression of renal anemia has been shown to be associated with advanced renal tubulointerstitial lesions. This retrospective study investigated the impact of lower hemoglobin (Hb) levels and renal interstitial fibrosis and tubular atrophy (IFTA) on long-term outcomes in type 2 diabetes with biopsy-proven diabetic nephropathy. A total of 233 patients were enrolled. The severity of IFTA was scored according to the classification by the Renal Pathology Society. Patients were stratified according to baseline Hb tertiles by IFTA status. The outcomes were the first occurrence of renal events (requirement for dialysis or 50 % decline in estimated glomerular filtration rate from baseline) and all-cause mortality. At baseline, 151 patients had severe IFTA. There were no patients who have been received erythropoiesis-stimulating agents at the time of renal biopsy. The severity of IFTA was the independent pathological factor of lower Hb levels. During the mean follow-up period of 8.6 years (maximum, 32.4 years), 119 renal events and 42 deaths were observed. Compared with the combined influence of the highest tertile of Hb and mild IFTA, the risks of renal events were higher for the middle tertile and for the lowest tertile of Hb in severe IFTA, whereas the risk of renal events was higher for the lowest tertile of Hb in mild IFTA. The risk of mortality was higher for the lowest tertile of Hb only in severe IFTA. There were significant interactions of tertile of Hb and IFTA in renal events and mortality. Impacts of lower Hb levels on long-term outcomes of diabetic nephropathy were greater in severe IFTA than in mild IFTA.

Tài liệu tham khảo

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