Noninvasive detection of renal allograft inflammation by measurements of mRNA for IP-10 and CXCR3 in urine

Ravi Raju Tatapudi, Thangamani Muthukumar, Darshana Dadhania, Ruchuang Ding, Baogui Li, Vijay K. Sharma, Elizabeth Lozada-Pastorio, Nagashree Seetharamu, Choli Hartono, David Serur, Surya V. Seshan, Sandip Kapur, Wayne W. Hancock, Manikkam Suthanthiran

Research output: Contribution to journalArticle

146 Citations (Scopus)

Abstract

Background. We explored the hypothesis that measurements of mRNA encoding interferon-inducible protein-10 (IP-10) or the chemokine receptor CXCR3 in urinary cells offer a noninvasive means of elucidating cellular traffic causing acute rejection of human renal allografts. Methods. We obtained 63 urine specimens from 58 renal allograft recipients who underwent 63 allograft biopsies to resolve the basis for graft dysfunction, and 27 additional urine samples from 24 other patients with stable allograft function. Twenty-seven of the 63 biopsies were classified as acute rejection, 20 as other, and 16 as chronic allograft nephropathy. We measured the levels of transcripts for IP-10 and CXCR3, and a constitutively expressed gene 18S rRNA in the urine specimens and correlated transcript levels with renal allograft diagnosis. Results. mRNA levels of IP-10 (P < 0.0001) or CXCR3 (P < 0.0001) but not the levels of 18S rRNA (P = 0.56) predicted intragraft cellular traffic causing acute rejection. Receiver-operating characteristic curve analysis demonstrated that acute rejection can be predicted with a sensitivity of 100% and a specificity of 78% using the (log-transformed) cutoff value of 9.11 copies of IP-10, and with a sensitivity of 63% and a specificity of 83% using the cutoff value of 11.59 copies of CXCR3. Immunohistologic analysis of allograft biopsies showed exuberant expression of IP-10 and CXCR3 during acute rejection whereas both were absent in grafts with stable function. Conclusion. Our investigation demonstrates that intragraft cellular events associated with acute rejection of human renal allografts can be noninvasively identified by measurements of mRNA for IP-10 and CXCR3 in urinary cells.

Original languageEnglish
Pages (from-to)2390-2397
Number of pages8
JournalKidney International
Volume65
Issue number6
DOIs
Publication statusPublished - 1 Jan 2004
Externally publishedYes

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Allografts
Urine
Inflammation
Kidney
Messenger RNA
Proteins
Biopsy
Chemokine CXCL10
Transplants
Chemokine Receptors
rRNA Genes
ROC Curve

Keywords

  • Chemokines
  • mRNA
  • Rejection

ASJC Scopus subject areas

  • Nephrology

Cite this

Noninvasive detection of renal allograft inflammation by measurements of mRNA for IP-10 and CXCR3 in urine. / Tatapudi, Ravi Raju; Muthukumar, Thangamani; Dadhania, Darshana; Ding, Ruchuang; Li, Baogui; Sharma, Vijay K.; Lozada-Pastorio, Elizabeth; Seetharamu, Nagashree; Hartono, Choli; Serur, David; Seshan, Surya V.; Kapur, Sandip; Hancock, Wayne W.; Suthanthiran, Manikkam.

In: Kidney International, Vol. 65, No. 6, 01.01.2004, p. 2390-2397.

Research output: Contribution to journalArticle

Tatapudi, RR, Muthukumar, T, Dadhania, D, Ding, R, Li, B, Sharma, VK, Lozada-Pastorio, E, Seetharamu, N, Hartono, C, Serur, D, Seshan, SV, Kapur, S, Hancock, WW & Suthanthiran, M 2004, 'Noninvasive detection of renal allograft inflammation by measurements of mRNA for IP-10 and CXCR3 in urine', Kidney International, vol. 65, no. 6, pp. 2390-2397. https://doi.org/10.1111/j.1523-1755.2004.00663.x
Tatapudi, Ravi Raju ; Muthukumar, Thangamani ; Dadhania, Darshana ; Ding, Ruchuang ; Li, Baogui ; Sharma, Vijay K. ; Lozada-Pastorio, Elizabeth ; Seetharamu, Nagashree ; Hartono, Choli ; Serur, David ; Seshan, Surya V. ; Kapur, Sandip ; Hancock, Wayne W. ; Suthanthiran, Manikkam. / Noninvasive detection of renal allograft inflammation by measurements of mRNA for IP-10 and CXCR3 in urine. In: Kidney International. 2004 ; Vol. 65, No. 6. pp. 2390-2397.
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abstract = "Background. We explored the hypothesis that measurements of mRNA encoding interferon-inducible protein-10 (IP-10) or the chemokine receptor CXCR3 in urinary cells offer a noninvasive means of elucidating cellular traffic causing acute rejection of human renal allografts. Methods. We obtained 63 urine specimens from 58 renal allograft recipients who underwent 63 allograft biopsies to resolve the basis for graft dysfunction, and 27 additional urine samples from 24 other patients with stable allograft function. Twenty-seven of the 63 biopsies were classified as acute rejection, 20 as other, and 16 as chronic allograft nephropathy. We measured the levels of transcripts for IP-10 and CXCR3, and a constitutively expressed gene 18S rRNA in the urine specimens and correlated transcript levels with renal allograft diagnosis. Results. mRNA levels of IP-10 (P < 0.0001) or CXCR3 (P < 0.0001) but not the levels of 18S rRNA (P = 0.56) predicted intragraft cellular traffic causing acute rejection. Receiver-operating characteristic curve analysis demonstrated that acute rejection can be predicted with a sensitivity of 100{\%} and a specificity of 78{\%} using the (log-transformed) cutoff value of 9.11 copies of IP-10, and with a sensitivity of 63{\%} and a specificity of 83{\%} using the cutoff value of 11.59 copies of CXCR3. Immunohistologic analysis of allograft biopsies showed exuberant expression of IP-10 and CXCR3 during acute rejection whereas both were absent in grafts with stable function. Conclusion. Our investigation demonstrates that intragraft cellular events associated with acute rejection of human renal allografts can be noninvasively identified by measurements of mRNA for IP-10 and CXCR3 in urinary cells.",
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AU - Tatapudi, Ravi Raju

AU - Muthukumar, Thangamani

AU - Dadhania, Darshana

AU - Ding, Ruchuang

AU - Li, Baogui

AU - Sharma, Vijay K.

AU - Lozada-Pastorio, Elizabeth

AU - Seetharamu, Nagashree

AU - Hartono, Choli

AU - Serur, David

AU - Seshan, Surya V.

AU - Kapur, Sandip

AU - Hancock, Wayne W.

AU - Suthanthiran, Manikkam

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N2 - Background. We explored the hypothesis that measurements of mRNA encoding interferon-inducible protein-10 (IP-10) or the chemokine receptor CXCR3 in urinary cells offer a noninvasive means of elucidating cellular traffic causing acute rejection of human renal allografts. Methods. We obtained 63 urine specimens from 58 renal allograft recipients who underwent 63 allograft biopsies to resolve the basis for graft dysfunction, and 27 additional urine samples from 24 other patients with stable allograft function. Twenty-seven of the 63 biopsies were classified as acute rejection, 20 as other, and 16 as chronic allograft nephropathy. We measured the levels of transcripts for IP-10 and CXCR3, and a constitutively expressed gene 18S rRNA in the urine specimens and correlated transcript levels with renal allograft diagnosis. Results. mRNA levels of IP-10 (P < 0.0001) or CXCR3 (P < 0.0001) but not the levels of 18S rRNA (P = 0.56) predicted intragraft cellular traffic causing acute rejection. Receiver-operating characteristic curve analysis demonstrated that acute rejection can be predicted with a sensitivity of 100% and a specificity of 78% using the (log-transformed) cutoff value of 9.11 copies of IP-10, and with a sensitivity of 63% and a specificity of 83% using the cutoff value of 11.59 copies of CXCR3. Immunohistologic analysis of allograft biopsies showed exuberant expression of IP-10 and CXCR3 during acute rejection whereas both were absent in grafts with stable function. Conclusion. Our investigation demonstrates that intragraft cellular events associated with acute rejection of human renal allografts can be noninvasively identified by measurements of mRNA for IP-10 and CXCR3 in urinary cells.

AB - Background. We explored the hypothesis that measurements of mRNA encoding interferon-inducible protein-10 (IP-10) or the chemokine receptor CXCR3 in urinary cells offer a noninvasive means of elucidating cellular traffic causing acute rejection of human renal allografts. Methods. We obtained 63 urine specimens from 58 renal allograft recipients who underwent 63 allograft biopsies to resolve the basis for graft dysfunction, and 27 additional urine samples from 24 other patients with stable allograft function. Twenty-seven of the 63 biopsies were classified as acute rejection, 20 as other, and 16 as chronic allograft nephropathy. We measured the levels of transcripts for IP-10 and CXCR3, and a constitutively expressed gene 18S rRNA in the urine specimens and correlated transcript levels with renal allograft diagnosis. Results. mRNA levels of IP-10 (P < 0.0001) or CXCR3 (P < 0.0001) but not the levels of 18S rRNA (P = 0.56) predicted intragraft cellular traffic causing acute rejection. Receiver-operating characteristic curve analysis demonstrated that acute rejection can be predicted with a sensitivity of 100% and a specificity of 78% using the (log-transformed) cutoff value of 9.11 copies of IP-10, and with a sensitivity of 63% and a specificity of 83% using the cutoff value of 11.59 copies of CXCR3. Immunohistologic analysis of allograft biopsies showed exuberant expression of IP-10 and CXCR3 during acute rejection whereas both were absent in grafts with stable function. Conclusion. Our investigation demonstrates that intragraft cellular events associated with acute rejection of human renal allografts can be noninvasively identified by measurements of mRNA for IP-10 and CXCR3 in urinary cells.

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