Correlation between renal distribution of leptospires during the acute phase and chronic renal dysfunction in a hamster model of infection with Leptospira interrogans.
<h4>Background</h4>Leptospirosis has been described as a biphasic disease consisting of hematogenous dissemination to major organs in the acute phase and asymptomatic renal colonization in the chronic phase. Several observational studies have suggested an association between leptospirosi...
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2021
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oai:doaj.org-article:54a3bc1aefaa41e0a2191b57530acbf12021-11-25T06:31:45ZCorrelation between renal distribution of leptospires during the acute phase and chronic renal dysfunction in a hamster model of infection with Leptospira interrogans.1935-27271935-273510.1371/journal.pntd.0009410https://doaj.org/article/54a3bc1aefaa41e0a2191b57530acbf12021-06-01T00:00:00Zhttps://doi.org/10.1371/journal.pntd.0009410https://doaj.org/toc/1935-2727https://doaj.org/toc/1935-2735<h4>Background</h4>Leptospirosis has been described as a biphasic disease consisting of hematogenous dissemination to major organs in the acute phase and asymptomatic renal colonization in the chronic phase. Several observational studies have suggested an association between leptospirosis and chronic kidney disease (CKD). We investigated the dynamics of leptospires and histopathological changes in the kidney to understand the relationship between them, and also investigated the extent of renal dysfunction in the acute and chronic phases of leptospirosis using a hamster model.<h4>Findings</h4>Hamsters (n = 68) were subcutaneously infected with 1 × 104 cells of the Leptospira interrogans serovar Manilae strain UP-MMC-SM. A total of 53 infected hamsters developed fatal acute leptospirosis, and the remaining 15 hamsters recovered from the acute phase, 13 of which showed Leptospira colonization in the kidneys in the chronic phase. Five asymptomatic hamsters also had renal colonization in the chronic phase. Immunofluorescence staining showed that leptospires were locally distributed in the renal interstitium in the early acute phase and then spread continuously into the surrounding interstitium. The kidneys of the surviving hamsters in the chronic phase showed patchy lesions of atrophic tubules, a finding of chronic tubulointerstitial nephritis, which were substantially consistent with the distribution of leptospires in the renal interstitium. The degree of atrophic tubules in kidney sections correlated statistically with the serum creatinine level in the chronic phase (rs = 0.78, p = 0.01).<h4>Conclusion</h4>Subcutaneous infection with pathogenic leptospires could cause acute death or chronic leptospirosis in hamsters after surviving the acute phase. We suggest that the renal distribution of leptospires during the acute phase probably affected the extent of tubular atrophy, leading to CKD.Tsukasa MaruokaYasuhiko NikaidoSatoshi MiyaharaEisuke KatafuchiYoshinori InamasuMidori OgawaKazumasa FukudaToshiyuki NakayamaTakafumi HorishitaMitsumasa SaitoPublic Library of Science (PLoS)articleArctic medicine. Tropical medicineRC955-962Public aspects of medicineRA1-1270ENPLoS Neglected Tropical Diseases, Vol 15, Iss 6, p e0009410 (2021) |
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Arctic medicine. Tropical medicine RC955-962 Public aspects of medicine RA1-1270 |
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Arctic medicine. Tropical medicine RC955-962 Public aspects of medicine RA1-1270 Tsukasa Maruoka Yasuhiko Nikaido Satoshi Miyahara Eisuke Katafuchi Yoshinori Inamasu Midori Ogawa Kazumasa Fukuda Toshiyuki Nakayama Takafumi Horishita Mitsumasa Saito Correlation between renal distribution of leptospires during the acute phase and chronic renal dysfunction in a hamster model of infection with Leptospira interrogans. |
| description |
<h4>Background</h4>Leptospirosis has been described as a biphasic disease consisting of hematogenous dissemination to major organs in the acute phase and asymptomatic renal colonization in the chronic phase. Several observational studies have suggested an association between leptospirosis and chronic kidney disease (CKD). We investigated the dynamics of leptospires and histopathological changes in the kidney to understand the relationship between them, and also investigated the extent of renal dysfunction in the acute and chronic phases of leptospirosis using a hamster model.<h4>Findings</h4>Hamsters (n = 68) were subcutaneously infected with 1 × 104 cells of the Leptospira interrogans serovar Manilae strain UP-MMC-SM. A total of 53 infected hamsters developed fatal acute leptospirosis, and the remaining 15 hamsters recovered from the acute phase, 13 of which showed Leptospira colonization in the kidneys in the chronic phase. Five asymptomatic hamsters also had renal colonization in the chronic phase. Immunofluorescence staining showed that leptospires were locally distributed in the renal interstitium in the early acute phase and then spread continuously into the surrounding interstitium. The kidneys of the surviving hamsters in the chronic phase showed patchy lesions of atrophic tubules, a finding of chronic tubulointerstitial nephritis, which were substantially consistent with the distribution of leptospires in the renal interstitium. The degree of atrophic tubules in kidney sections correlated statistically with the serum creatinine level in the chronic phase (rs = 0.78, p = 0.01).<h4>Conclusion</h4>Subcutaneous infection with pathogenic leptospires could cause acute death or chronic leptospirosis in hamsters after surviving the acute phase. We suggest that the renal distribution of leptospires during the acute phase probably affected the extent of tubular atrophy, leading to CKD. |
| format |
article |
| author |
Tsukasa Maruoka Yasuhiko Nikaido Satoshi Miyahara Eisuke Katafuchi Yoshinori Inamasu Midori Ogawa Kazumasa Fukuda Toshiyuki Nakayama Takafumi Horishita Mitsumasa Saito |
| author_facet |
Tsukasa Maruoka Yasuhiko Nikaido Satoshi Miyahara Eisuke Katafuchi Yoshinori Inamasu Midori Ogawa Kazumasa Fukuda Toshiyuki Nakayama Takafumi Horishita Mitsumasa Saito |
| author_sort |
Tsukasa Maruoka |
| title |
Correlation between renal distribution of leptospires during the acute phase and chronic renal dysfunction in a hamster model of infection with Leptospira interrogans. |
| title_short |
Correlation between renal distribution of leptospires during the acute phase and chronic renal dysfunction in a hamster model of infection with Leptospira interrogans. |
| title_full |
Correlation between renal distribution of leptospires during the acute phase and chronic renal dysfunction in a hamster model of infection with Leptospira interrogans. |
| title_fullStr |
Correlation between renal distribution of leptospires during the acute phase and chronic renal dysfunction in a hamster model of infection with Leptospira interrogans. |
| title_full_unstemmed |
Correlation between renal distribution of leptospires during the acute phase and chronic renal dysfunction in a hamster model of infection with Leptospira interrogans. |
| title_sort |
correlation between renal distribution of leptospires during the acute phase and chronic renal dysfunction in a hamster model of infection with leptospira interrogans. |
| publisher |
Public Library of Science (PLoS) |
| publishDate |
2021 |
| url |
https://doaj.org/article/54a3bc1aefaa41e0a2191b57530acbf1 |
| work_keys_str_mv |
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| _version_ |
1718413680736993280 |