1
|
Saito K, Yokawa S, Kurihara H, Yaoita E, Mizuta S, Tada K, Oda M, Hatakeyama H, Ohta Y. FilGAP controls cell-extracellular matrix adhesion and process formation of kidney podocytes. FASEB J 2024; 38:e23504. [PMID: 38421271 DOI: 10.1096/fj.202301691rr] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2023] [Revised: 01/17/2024] [Accepted: 02/07/2024] [Indexed: 03/02/2024]
Abstract
The function of kidney podocytes is closely associated with actin cytoskeleton regulated by Rho small GTPases. Loss of actin-driven cell adhesions and processes is connected to podocyte dysfunction, proteinuria, and kidney diseases. FilGAP, a GTPase-activating protein for Rho small GTPase Rac1, is abundantly expressed in kidney podocytes, and its gene is linked to diseases in a family with focal segmental glomerulosclerosis. In this study, we have studied the role of FilGAP in podocytes in vitro. Depletion of FilGAP in cultured podocytes induced loss of actin stress fibers and increased Rac1 activity. Conversely, forced expression of FilGAP increased stress fiber formation whereas Rac1 activation significantly reduced its formation. FilGAP localizes at the focal adhesion (FA), an integrin-based protein complex closely associated with stress fibers, that mediates cell-extracellular matrix (ECM) adhesion, and FilGAP depletion decreased FA formation and impaired attachment to the ECM. Moreover, in unique podocyte cell cultures capable of inducing the formation of highly organized processes including major processes and foot process-like projections, FilGAP depletion or Rac1 activation decreased the formation of these processes. The reduction of FAs and process formations in FilGAP-depleted podocyte cells was rescued by inhibition of Rac1 or P21-activated kinase 1 (PAK1), a downstream effector of Rac1, and PAK1 activation inhibited their formations. Thus, FilGAP contributes to both cell-ECM adhesion and process formation of podocytes by suppressing Rac1/PAK1 signaling.
Collapse
Affiliation(s)
- Koji Saito
- Division of Cell Biology, Department of Biosciences, School of Science, Kitasato University, Sagamihara, Kanagawa, Japan
| | - Seiji Yokawa
- Division of Cell Biology, Department of Biosciences, School of Science, Kitasato University, Sagamihara, Kanagawa, Japan
| | - Hidetake Kurihara
- Department of Physical Therapy, Faculty of Health Sciences, Aino University, Osaka, Ibaraki, Japan
| | - Eishin Yaoita
- Kidney Research Center, Niigata University Graduate School of Medical and Dental Sciences, Niigata, Niigata, Japan
| | - Sari Mizuta
- Division of Cell Biology, Department of Biosciences, School of Science, Kitasato University, Sagamihara, Kanagawa, Japan
| | - Kanae Tada
- Division of Cell Biology, Department of Biosciences, School of Science, Kitasato University, Sagamihara, Kanagawa, Japan
| | - Moemi Oda
- Division of Cell Biology, Department of Biosciences, School of Science, Kitasato University, Sagamihara, Kanagawa, Japan
| | - Hiroyasu Hatakeyama
- Department of Physiology, School of Medicine, Kitasato University, Sagamihara, Kanagawa, Japan
| | - Yasutaka Ohta
- Division of Cell Biology, Department of Biosciences, School of Science, Kitasato University, Sagamihara, Kanagawa, Japan
| |
Collapse
|
2
|
Goto S, Yoshida Y, Hosojima M, Kuwahara S, Kabasawa H, Aoki H, Iida T, Sawada R, Ugamura D, Yoshizawa Y, Takemoto K, Komochi K, Kobayashi R, Kaseda R, Yaoita E, Nagatoishi S, Narita I, Tsumoto K, Saito A. Megalin is involved in angiotensinogen-induced, angiotensin II-mediated ERK1/2 signaling to activate Na + -H + exchanger 3 in proximal tubules. J Hypertens 2023; 41:1831-1843. [PMID: 37682076 DOI: 10.1097/hjh.0000000000003555] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/09/2023]
Abstract
BACKGROUND Kidney angiotensin (Ang) II is produced mainly from liver-derived, glomerular-filtered angiotensinogen (AGT). Podocyte injury has been reported to increase the kidney Ang II content and induce Na + retention depending on the function of megalin, a proximal tubular endocytosis receptor. However, how megalin regulates the renal content and action of Ang II remains elusive. METHODS We used a mass spectrometry-based, parallel reaction-monitoring assay to quantitate Ang II in plasma, urine, and kidney homogenate of kidney-specific conditional megalin knockout (MegKO) and control (Ctl) mice. We also evaluated the pathophysiological changes in both mouse genotypes under the basal condition and under the condition of increased glomerular filtration of AGT induced by administration of recombinant mouse AGT (rec-mAGT). RESULTS Under the basal condition, plasma and kidney Ang II levels were comparable in the two mouse groups. Ang II was detected abundantly in fresh spot urine in conditional MegKO mice. Megalin was also found to mediate the uptake of intravenously administered fluorescent Ang II by PTECs. Administration of rec-mAGT increased kidney Ang II, exerted renal extracellular signal-regulated kinase 1/2 (ERK1/2) signaling, activated proximal tubular Na + -H + exchanger 3 (NHE3), and decreased urinary Na + excretion in Ctl mice, whereas these changes were suppressed but urinary Ang II was increased in conditional MegKO mice. CONCLUSION Increased glomerular filtration of AGT is likely to augment Ang II production in the proximal tubular lumen. Thus, megalin-dependent Ang II uptake should be involved in the ERK1/2 signaling that activates proximal tubular NHE3 in vivo , thereby causing Na + retention.
Collapse
Affiliation(s)
| | | | | | | | | | | | | | | | | | | | | | | | | | - Ryohei Kaseda
- Department of Clinical Nephrology and Rheumatology, Kidney Research Center, Niigata University Graduate School of Medical and Dental Sciences, Niigata City, Niigata
| | | | | | - Ichiei Narita
- Department of Clinical Nephrology and Rheumatology, Kidney Research Center, Niigata University Graduate School of Medical and Dental Sciences, Niigata City, Niigata
| | - Kouhei Tsumoto
- The Institute of Medical Science and Department of Bioengineering, Graduate School of Engineering, The University of Tokyo, Tokyo, Japan
| | | |
Collapse
|
3
|
Yaoita E. Restoration of Podocyte Phenotype in Culture. Methods Mol Biol 2023; 2664:3-12. [PMID: 37423978 DOI: 10.1007/978-1-0716-3179-9_1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/11/2023]
Abstract
The most distinctive characteristic of podocytes in the kidney is the presence of interdigitating cell processes with nephrin and podocin that are concentrated at sites of cell-cell contact. Unfortunately, these defining features are easily lost in culture. We previously reported culture conditions that can restore the differentiated phenotypes in primary cultures of rat podocyte. Since then, some of the materials used have been discontinued or improved. In this chapter, we therefore provide our most recent protocol for the restoration of the podocyte phenotype in culture.
Collapse
Affiliation(s)
- Eishin Yaoita
- Kidney Research Center, Niigata University Graduate School of Medical and Dental Sciences, Niigata, Japan.
| |
Collapse
|
4
|
Hoy J, Nishimura H, Mehalic T, Yaoita E, Gomez RA, Paxton R, Sequeira-Lopez MLS. Ontogeny of renin gene expression in the chicken, Gallus gallus. Gen Comp Endocrinol 2020; 296:113533. [PMID: 32561435 PMCID: PMC7678913 DOI: 10.1016/j.ygcen.2020.113533] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/31/2019] [Revised: 06/02/2020] [Accepted: 06/06/2020] [Indexed: 12/12/2022]
Abstract
Renin or a renin-like enzyme evolved in ancestral vertebrates and is conserved along the vertebrate phylogeny. The ontogenic development of renin, however, is not well understood in nonmammalian vertebrates. We aimed to determine the expression patterns and relative abundance of renin mRNA in pre- and postnatal chickens (Gallus gallus, White Leghorn breed). Embryonic day 13 (E13) embryos show renal tubules, undifferentiated mesenchymal structures, and a small number of developing glomeruli. Maturing glomeruli are seen in post-hatch day 4 (D4) and day 30 (D30) kidneys, indicating that nephrogenic activity still exists in kidneys of 4-week-old chickens. In E13 embryos, renin mRNA measured by quantitative polymerase chain reaction in the adrenal glands is equivalent to the expression in the kidneys, whereas in post-hatch D4 and D30 maturing chicks, renal renin expressions increased 2-fold and 11-fold, respectively. In contrast, relative renin expression in the adrenals became lower than in the kidneys. Furthermore, renin expression is clearly visible by in situ hybridization in the juxtaglomerular (JG) area in D4 and D30 chicks, but not in E13 embryos. The results suggest that in chickens, renin evolved in both renal and extrarenal organs at an early stage of ontogeny and, with maturation, became localized to the JG area. Clear JG structures are not morphologically detectable in E13 embryos, but are visible in 30-day-old chicks, supporting this concept.
Collapse
Affiliation(s)
- Jess Hoy
- Child Health Research Center, University of Virginia, Charlottesville, VA, USA
| | - Hiroko Nishimura
- Child Health Research Center, University of Virginia, Charlottesville, VA, USA; Kidney Research Center, Niigata University Graduate Sch. of Med. & Dent. Sci., Niigata, Japan.
| | - Theodore Mehalic
- Child Health Research Center, University of Virginia, Charlottesville, VA, USA
| | - Eishin Yaoita
- Kidney Research Center, Niigata University Graduate Sch. of Med. & Dent. Sci., Niigata, Japan
| | - R Ariel Gomez
- Child Health Research Center, University of Virginia, Charlottesville, VA, USA
| | - Robert Paxton
- Child Health Research Center, University of Virginia, Charlottesville, VA, USA
| | | |
Collapse
|
5
|
Oyama T, Yaoita E, Yoshida Y, Ikarashi A, Fujinaka H. Distinct differences between cultured podocytes and parietal epithelial cells of the Bowman's capsule. Cell Tissue Res 2020; 380:581-591. [PMID: 31989254 DOI: 10.1007/s00441-020-03170-4] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2019] [Accepted: 01/09/2020] [Indexed: 11/24/2022]
Abstract
Phenotypic changes in culture hamper the identification and characterization of cultured podocytes and parietal epithelial cells of the Bowman's capsule (PECs). We have recently established culture conditions that restore podocytes to their differentiated phenotypes. We compared podocytes and PECs cultured under the same conditions to determine the unique characteristics of the two cell types. Performing this comparison under the same conditions accentuated these differences. Podocytes behaved like non-epithelial cells by extending cell processes even at confluence. By contrast, PECs behaved like typical epithelial cells by maintaining a polygonal appearance. Other differences were identified using immunostaining and RT-PCR; podocytes expressed high levels of podocyte-specific markers while PECs expressed high levels of PEC-specific markers. However, while podocytes expressed low levels of PEC markers, PECs expressed low levels of podocyte markers. Therefore, the identification of podocytes and PECs in culture requires the evaluation of respective cell markers and the expression of markers for other cell types.
Collapse
Affiliation(s)
- Tomizo Oyama
- Department of Structural Pathology, Kidney Research Center, Niigata University Graduate School of Medical and Dental Sciences, 1-757 Asahimachi-dori, Chuo-ku, Niigata-shi, Niigata, 951-8510, Japan
| | - Eishin Yaoita
- Department of Structural Pathology, Kidney Research Center, Niigata University Graduate School of Medical and Dental Sciences, 1-757 Asahimachi-dori, Chuo-ku, Niigata-shi, Niigata, 951-8510, Japan.
| | - Yutaka Yoshida
- Department of Structural Pathology, Kidney Research Center, Niigata University Graduate School of Medical and Dental Sciences, 1-757 Asahimachi-dori, Chuo-ku, Niigata-shi, Niigata, 951-8510, Japan
| | - Ayako Ikarashi
- Division of Instrumental Analysis, Center for Coordination of Research Facilities, Institute for Research Promotion, Niigata University, Niigata, Japan
| | - Hidehiko Fujinaka
- Department of Clinical Research, Niigata National Hospital, Kashiwazaki, Japan
| |
Collapse
|
6
|
Hoy J, Nishimura H, Yaoita E, Gomez RA, Sequiera‐Lopez MLS. Ontogeny of renin gene expression and juxtaglomerular apparatus in birds. FASEB J 2019. [DOI: 10.1096/fasebj.2019.33.1_supplement.729.4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Jessica Hoy
- Child Health Research CenterUniversity of VirginiaCharlottesvilleVA
| | - Hiroko Nishimura
- Child Health Research CenterUniversity of VirginiaCharlottesvilleVA
- Kidney Research CenterNiigata University Graduate School of Medical & Dental SciencesNiigataJapan
| | - Eishin Yaoita
- Kidney Research CenterNiigata University Graduate School of Medical & Dental SciencesNiigataJapan
| | | | | |
Collapse
|
7
|
Asada Y, Takayanagi T, Kawakami T, Tomatsu E, Masuda A, Yoshino Y, Sekiguchi-Ueda S, Shibata M, Ide T, Niimi H, Yaoita E, Seino Y, Sugimura Y, Suzuki A. Risedronate Attenuates Podocyte Injury in Phosphate Transporter-Overexpressing Rats. Int J Endocrinol 2019; 2019:4194853. [PMID: 31772574 PMCID: PMC6854176 DOI: 10.1155/2019/4194853] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/27/2019] [Accepted: 08/29/2019] [Indexed: 01/01/2023] Open
Abstract
Osteoporosis patients with chronic kidney disease (CKD) are becoming common in our superaging society. Renal dysfunction causes phosphorus accumulation in the circulating plasma and leads to the development of CKD-mineral bone disorder (MBD). We have previously reported that type III Pi transporter-overexpressing transgenic (Pit-1 TG) rats manifest phosphate (Pi)-dependent podocyte injury. In the present study, we explored the effect of risedronate on Pi-induced podocyte injury in vivo. Pit-1 TG rats and wild-type rats at 5 weeks old were divided into a risedronate-treated group and an untreated group. We subcutaneously administered 5 μg/kg body weight of risedronate or saline twice a week during the experimental period. Risedronate did not alter serum creatinine levels at 5, 8, and 12 weeks of age. However, electron microscopy images showed that thickening of the glomerular basement membrane was improved in the risedronate treatment group. Furthermore, immunostaining for podocyte injury markers revealed that both desmin- and connexin43-positive areas were smaller in the risedronate-treated group than in the untreated group, suggesting that bisphosphonates could rescue Pi-induced podocyte injury. In conclusion, our findings suggest that risedronate could maintain glomerular barrier function by rescuing Pi-induced podocyte injury.
Collapse
Affiliation(s)
- Yohei Asada
- Department of Endocrinology and Metabolism, Fujita Health University, Toyoake, Aichi 470-1192, Japan
| | - Takeshi Takayanagi
- Department of Endocrinology and Metabolism, Fujita Health University, Toyoake, Aichi 470-1192, Japan
| | - Tsukasa Kawakami
- Department of Endocrinology and Metabolism, Fujita Health University, Toyoake, Aichi 470-1192, Japan
| | - Eisuke Tomatsu
- Department of Endocrinology and Metabolism, Fujita Health University, Toyoake, Aichi 470-1192, Japan
| | - Atsushi Masuda
- Department of Endocrinology and Metabolism, Fujita Health University, Toyoake, Aichi 470-1192, Japan
| | - Yasumasa Yoshino
- Department of Endocrinology and Metabolism, Fujita Health University, Toyoake, Aichi 470-1192, Japan
| | - Sahoko Sekiguchi-Ueda
- Department of Endocrinology and Metabolism, Fujita Health University, Toyoake, Aichi 470-1192, Japan
| | - Megumi Shibata
- Department of Endocrinology and Metabolism, Fujita Health University, Toyoake, Aichi 470-1192, Japan
| | - Tomihiko Ide
- Joint Research Support Promotion Facility, Center for Research Promotion and Support, Fujita Health University, Toyoake, Aichi 470-1192, Japan
| | - Hajime Niimi
- Department of Anatomy, Fujita Health University, Toyoake, Aichi 470-1192, Japan
| | - Eishin Yaoita
- Department of Structural Pathology, Institute of Nephrology, Niigata University Graduate School of Medical and Dental Sciences, Niigata 950-2102, Japan
| | - Yusuke Seino
- Department of Endocrinology and Metabolism, Fujita Health University, Toyoake, Aichi 470-1192, Japan
| | - Yoshihisa Sugimura
- Department of Endocrinology and Metabolism, Fujita Health University, Toyoake, Aichi 470-1192, Japan
| | - Atsushi Suzuki
- Department of Endocrinology and Metabolism, Fujita Health University, Toyoake, Aichi 470-1192, Japan
| |
Collapse
|
8
|
Horikawa A, Yoneda T, Yaoita E, Yamaguchi K, Shigenobu S, Kuramochi M, Yamate J, Inui T, Ishibashi O. A novel splicing variant of small nucleolar RNA host gene 4 is a podocyte-selective non-coding RNA upregulated in response to puromycin aminonucleoside-induced podocyte injury. J Biochem 2018; 165:447-454. [DOI: 10.1093/jb/mvy118] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2018] [Accepted: 12/13/2018] [Indexed: 12/14/2022] Open
Affiliation(s)
- Aya Horikawa
- Department of Applied Life Sciences, Osaka Prefecture University, Graduate School of Life and Environmental Sciences, 1-1 Gakuen-cho, Naka-ku, Sakai, Osaka, Japan
| | - Tomomi Yoneda
- Department of Applied Life Sciences, Osaka Prefecture University, Graduate School of Life and Environmental Sciences, 1-1 Gakuen-cho, Naka-ku, Sakai, Osaka, Japan
| | - Eishin Yaoita
- Department of Structural Pathology, Kidney Research Center, Niigata University Graduate School of Medical and Dental Sciences, 1-757 Asahimachi-dori, Chuo-ku, Niigata, Japan
| | - Katsushi Yamaguchi
- NIBB Core Research Facilities, National Institute for Basic Biology, 38 Nishigonaka, Myodaiji, Okazaki, Japan
| | - Shuji Shigenobu
- NIBB Core Research Facilities, National Institute for Basic Biology, 38 Nishigonaka, Myodaiji, Okazaki, Japan
| | - Mizuki Kuramochi
- Laboratory of Veterinary Pathology, Graduate School of Life and Environmental Sciences, Osaka Prefecture University, 1-58 Rinku-Ourai-Kita, Izumisano, Osaka, Japan
| | - Jyoji Yamate
- Laboratory of Veterinary Pathology, Graduate School of Life and Environmental Sciences, Osaka Prefecture University, 1-58 Rinku-Ourai-Kita, Izumisano, Osaka, Japan
| | - Takashi Inui
- Department of Applied Life Sciences, Osaka Prefecture University, Graduate School of Life and Environmental Sciences, 1-1 Gakuen-cho, Naka-ku, Sakai, Osaka, Japan
| | - Osamu Ishibashi
- Department of Applied Life Sciences, Osaka Prefecture University, Graduate School of Life and Environmental Sciences, 1-1 Gakuen-cho, Naka-ku, Sakai, Osaka, Japan
| |
Collapse
|
9
|
Yaoita E, Yoshida Y, Nameta M, Takimoto H, Fujinaka H. Induction of interdigitating cell processes in podocyte culture. Kidney Int 2018; 93:519-524. [DOI: 10.1016/j.kint.2017.06.031] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2017] [Revised: 06/13/2017] [Accepted: 06/22/2017] [Indexed: 10/18/2022]
|
10
|
Yaoita E, Nishimura H, Nameta M, Yoshida Y, Takimoto H, Fujinaka H, Kawachi H, Magdeldin S, Zhang Y, Xu B, Oyama T, Nakamura F, Yamamoto T. Avian Podocytes, Which Lack Nephrin, Use Adherens Junction Proteins at Intercellular Junctions. J Histochem Cytochem 2015; 64:67-76. [PMID: 26416242 DOI: 10.1369/0022155415611708] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2015] [Accepted: 09/19/2015] [Indexed: 12/14/2022] Open
Abstract
Nephrin, a major intercellular junction (ICJ) molecule of mammalian podocytes in the renal glomerulus, is absent in the avian genome. We hypothesized that birds use ICJ molecules other than nephrin in their podocytes. Therefore, in the present study, we examined the possible involvement of adherens junction (AJ) proteins in the ICJs of avian podocytes. We found the AJ proteins N-cadherin and α- and β-catenins in podocytes of quail and chickens but not in those of rats, pigs or humans. The AJ proteins were prominent in avian glomerulus-rich fractions in immunoblot analyses, and in immunofluorescence microscopy analyses, they were localized along glomerular capillary walls appearing in at least two staining patterns: weakly diffuse and distinctly granular. Immunoelectron microscopy demonstrated that the significant accumulation of immunogold particles for the AJ proteins were especially evident in avian slit diaphragms and AJs. Furthermore, N-cadherin was found to be expressed in all nephron cells in the early developmental stage but became confined to podocytes during maturation. These results indicate that avian slit diaphragms clearly express AJ proteins as compared with that in the mammal-where AJ proteins are suppressed to an extremely low level-and that avian podocytes are interconnected by AJs per se in addition to slit diaphragms.
Collapse
Affiliation(s)
- Eishin Yaoita
- Department of Structural Pathology, Institute of Nephrology, Niigata University Graduate School of Medical and Dental Sciences, Niigata, Japan (EY, YY, HT, SM, YZ, BX, TO, FN, TY)
| | - Hiroko Nishimura
- Department of Health Informatics, Niigata University of Health and Welfare, Niigata, Japan (HN)
| | - Masaaki Nameta
- Cooperative Laboratory of Electron Microscopy, Niigata University, Niigata, Japan (MN)
| | - Yutaka Yoshida
- Department of Structural Pathology, Institute of Nephrology, Niigata University Graduate School of Medical and Dental Sciences, Niigata, Japan (EY, YY, HT, SM, YZ, BX, TO, FN, TY)
| | - Hiroki Takimoto
- Department of Structural Pathology, Institute of Nephrology, Niigata University Graduate School of Medical and Dental Sciences, Niigata, Japan (EY, YY, HT, SM, YZ, BX, TO, FN, TY)
| | - Hidehiko Fujinaka
- Institute for Clinical Research, Niigata National Hospital, Niigata, Japan (HF)
| | - Hiroshi Kawachi
- Department of Cell Biology (HK), Institute of Nephrology, Niigata University Graduate School of Medical and Dental Sciences, Niigata, Japan
| | - Sameh Magdeldin
- Department of Structural Pathology, Institute of Nephrology, Niigata University Graduate School of Medical and Dental Sciences, Niigata, Japan (EY, YY, HT, SM, YZ, BX, TO, FN, TY)
| | - Ying Zhang
- Department of Structural Pathology, Institute of Nephrology, Niigata University Graduate School of Medical and Dental Sciences, Niigata, Japan (EY, YY, HT, SM, YZ, BX, TO, FN, TY)
| | - Bo Xu
- Department of Structural Pathology, Institute of Nephrology, Niigata University Graduate School of Medical and Dental Sciences, Niigata, Japan (EY, YY, HT, SM, YZ, BX, TO, FN, TY)
| | - Tomizo Oyama
- Department of Structural Pathology, Institute of Nephrology, Niigata University Graduate School of Medical and Dental Sciences, Niigata, Japan (EY, YY, HT, SM, YZ, BX, TO, FN, TY)
| | - Fujio Nakamura
- Department of Structural Pathology, Institute of Nephrology, Niigata University Graduate School of Medical and Dental Sciences, Niigata, Japan (EY, YY, HT, SM, YZ, BX, TO, FN, TY)
| | - Tadashi Yamamoto
- Department of Structural Pathology, Institute of Nephrology, Niigata University Graduate School of Medical and Dental Sciences, Niigata, Japan (EY, YY, HT, SM, YZ, BX, TO, FN, TY)
| |
Collapse
|
11
|
Zhang Y, Xu B, Kinoshita N, Yoshida Y, Tasaki M, Fujinaka H, Magdeldin S, Yaoita E, Yamamoto T. Datasets from label-free quantitative proteomic analysis of human glomeruli with sclerotic lesions. Data Brief 2015. [PMID: 26217785 PMCID: PMC4510465 DOI: 10.1016/j.dib.2015.05.013] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022] Open
Abstract
Human glomeruli with intermediate (i-GS) and advanced (GS) sclerotic lesions as well as the normal control (Nor) were captured from laser microdissection, digested by trypsin and subjected to shotgun LC-MS/MS analysis (LTQ-Orbitrap XL). The label-free quantification was performed using the Normalized Spectral Index (SI N ) to assess the relative molar concentration of each protein identified in a sample. All the experimental data are shown in this article. The data is associated to the research article submitted to Journal of Proteomics [1].
Collapse
Affiliation(s)
- Ying Zhang
- Department of Structural Pathology, Institute of Nephrology, Graduate School of Medical and Dental Sciences, Niigata University, Niigata, Japan ; Biofluid Biomarker Center (BB-C), Institute for Research Collaboration and Promotion, Niigata University, Niigata, Japan
| | - Bo Xu
- Department of Structural Pathology, Institute of Nephrology, Graduate School of Medical and Dental Sciences, Niigata University, Niigata, Japan
| | - Naohiko Kinoshita
- Department of Structural Pathology, Institute of Nephrology, Graduate School of Medical and Dental Sciences, Niigata University, Niigata, Japan
| | - Yutaka Yoshida
- Department of Structural Pathology, Institute of Nephrology, Graduate School of Medical and Dental Sciences, Niigata University, Niigata, Japan
| | - Masayuki Tasaki
- Division of Urology, Department of Regenerative and Transplant Medicine, Graduate School of Medical and Dental Sciences, Niigata University, Niigata, Japan
| | - Hidehiko Fujinaka
- Department of Structural Pathology, Institute of Nephrology, Graduate School of Medical and Dental Sciences, Niigata University, Niigata, Japan ; Institute of Clinical Research, Niigata National Hospital, Kashiwazaki, Japan
| | - Sameh Magdeldin
- Department of Structural Pathology, Institute of Nephrology, Graduate School of Medical and Dental Sciences, Niigata University, Niigata, Japan ; Department of Physiology, Faculty of Veterinary Medicine, Suez Canal University, Ismailia, Egypt
| | - Eishin Yaoita
- Department of Structural Pathology, Institute of Nephrology, Graduate School of Medical and Dental Sciences, Niigata University, Niigata, Japan
| | - Tadashi Yamamoto
- Department of Structural Pathology, Institute of Nephrology, Graduate School of Medical and Dental Sciences, Niigata University, Niigata, Japan ; Biofluid Biomarker Center (BB-C), Institute for Research Collaboration and Promotion, Niigata University, Niigata, Japan
| |
Collapse
|
12
|
Zhang Y, Muller M, Xu B, Yoshida Y, Horlacher O, Nikitin F, Garessus S, Magdeldin S, Kinoshita N, Fujinaka H, Yaoita E, Hasegawa M, Lisacek F, Yamamoto T. Unrestricted modification search reveals lysine methylation as major modification induced by tissue formalin fixation and paraffin embedding. Proteomics 2015; 15:2568-79. [PMID: 25825003 DOI: 10.1002/pmic.201400454] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2014] [Revised: 01/22/2015] [Accepted: 03/25/2015] [Indexed: 12/14/2022]
Abstract
Formalin-fixed paraffin-embedded (FFPE) tissue is considered as an appropriate alternative to frozen/fresh tissue for proteomic analysis. Here we study formalin-induced alternations on a proteome-wide level. We compared LC-MS/MS data of FFPE and frozen human kidney tissues by two methods. First, clustering analysis revealed that the biological variation is higher than the variation introduced by the two sample processing techniques and clusters formed in accordance with the biological tissue origin and not with the sample preservation method. Second, we combined open modification search and spectral counting to find modifications that are more abundant in FFPE samples compared to frozen samples. This analysis revealed lysine methylation (+14 Da) as the most frequent modification induced by FFPE preservation. We also detected a slight increase in methylene (+12 Da) and methylol (+30 Da) adducts as well as a putative modification of +58 Da, but they contribute less to the overall modification count. Subsequent SEQUEST analysis and X!Tandem searches of different datasets confirmed these trends. However, the modifications due to FFPE sample processing are a minor disturbance affecting 2-6% of all peptide-spectrum matches and the peptides lists identified in FFPE and frozen tissues are still highly similar.
Collapse
Affiliation(s)
- Ying Zhang
- Department of Structural Pathology, Institute of Nephrology, Graduate School of Medical and Dental Sciences, Niigata University, Niigata, Japan.,SIB-Swiss Institute of Bioinformatics, Geneva, Switzerland.,Biofluid Biomarker Center (BB-C), Institute for Research Collaboration and Promotion, Niigata University, Niigata, Japan
| | - Markus Muller
- SIB-Swiss Institute of Bioinformatics, Geneva, Switzerland
| | - Bo Xu
- Department of Structural Pathology, Institute of Nephrology, Graduate School of Medical and Dental Sciences, Niigata University, Niigata, Japan.,Department of Biology, Institute of Molecular Systems Biology, ETH Zurich, Zurich, Switzerland
| | - Yutaka Yoshida
- Department of Structural Pathology, Institute of Nephrology, Graduate School of Medical and Dental Sciences, Niigata University, Niigata, Japan
| | | | | | | | - Sameh Magdeldin
- Department of Structural Pathology, Institute of Nephrology, Graduate School of Medical and Dental Sciences, Niigata University, Niigata, Japan.,Department of Physiology, Faculty of Veterinary Medicine, Suez Canal University, Ismailia, Egypt
| | - Naohiko Kinoshita
- Department of Structural Pathology, Institute of Nephrology, Graduate School of Medical and Dental Sciences, Niigata University, Niigata, Japan
| | - Hidehiko Fujinaka
- Department of Structural Pathology, Institute of Nephrology, Graduate School of Medical and Dental Sciences, Niigata University, Niigata, Japan.,Institute of Clinical Research, Niigata National Hospital, Kashiwazaki, Japan
| | - Eishin Yaoita
- Department of Structural Pathology, Institute of Nephrology, Graduate School of Medical and Dental Sciences, Niigata University, Niigata, Japan
| | - Miki Hasegawa
- Division of Digestive & General Surgery, Niigata University, Niigata, Japan
| | | | - Tadashi Yamamoto
- Department of Structural Pathology, Institute of Nephrology, Graduate School of Medical and Dental Sciences, Niigata University, Niigata, Japan.,Biofluid Biomarker Center (BB-C), Institute for Research Collaboration and Promotion, Niigata University, Niigata, Japan
| |
Collapse
|
13
|
Yamamoto T, Fujinaka H, Kawasaki K, Yaoita E, Feng L, Wilson CB, Kihara I. CD8+ lymphocytes play a central role in the development of anti-GBM nephritis through induction of ICAM-I and chemokines in WKY rats. Contrib Nephrol 2015; 118:109-12. [PMID: 8744047 DOI: 10.1159/000425083] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Affiliation(s)
- T Yamamoto
- Institute of Nephrology, Niigata University School of Medicine, Japan
| | | | | | | | | | | | | |
Collapse
|
14
|
Magdeldin S, Enany S, Yoshida Y, Xu B, Zhang Y, Zureena Z, Lokamani I, Yaoita E, Yamamoto T. Basics and recent advances of two dimensional- polyacrylamide gel electrophoresis. Clin Proteomics 2014; 11:16. [PMID: 24735559 PMCID: PMC3996944 DOI: 10.1186/1559-0275-11-16] [Citation(s) in RCA: 134] [Impact Index Per Article: 13.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2013] [Accepted: 03/20/2014] [Indexed: 12/19/2022] Open
Abstract
Gel- based proteomics is one of the most versatile methods for fractionating protein complexes. Among these methods, two dimensional- polyacrylamide gel electrophoresis (2-DE) represents a mainstay orthogonal approach, which is popularly used to simultaneously fractionate, identify, and quantify proteins when coupled with mass spectrometric identification or other immunological tests. Although 2-DE was first introduced more than three decades ago, several challenges and limitations to its utility still exist. This review discusses the principles of 2-DE as well as both recent methodological advances and new applications.
Collapse
Affiliation(s)
- Sameh Magdeldin
- Department of Structural Pathology, Institute of Nephrology, Graduate School of Medical and Dental Sciences, Niigata University, 1-757 Asahimachi-dori, Niigata, Japan.,Department of Physiology, Faculty of Veterinary Medicine, Suez Canal University, Ismailia, Egypt
| | - Shymaa Enany
- Department of Structural Pathology, Institute of Nephrology, Graduate School of Medical and Dental Sciences, Niigata University, 1-757 Asahimachi-dori, Niigata, Japan.,Department of Microbiology and Immunology, Faculty of Pharmacy, Suez Canal University, Ismailia, Egypt
| | - Yutaka Yoshida
- Department of Structural Pathology, Institute of Nephrology, Graduate School of Medical and Dental Sciences, Niigata University, 1-757 Asahimachi-dori, Niigata, Japan
| | - Bo Xu
- Department of Structural Pathology, Institute of Nephrology, Graduate School of Medical and Dental Sciences, Niigata University, 1-757 Asahimachi-dori, Niigata, Japan
| | - Ying Zhang
- Department of Structural Pathology, Institute of Nephrology, Graduate School of Medical and Dental Sciences, Niigata University, 1-757 Asahimachi-dori, Niigata, Japan
| | | | | | - Eishin Yaoita
- Department of Structural Pathology, Institute of Nephrology, Graduate School of Medical and Dental Sciences, Niigata University, 1-757 Asahimachi-dori, Niigata, Japan
| | - Tadashi Yamamoto
- Department of Structural Pathology, Institute of Nephrology, Graduate School of Medical and Dental Sciences, Niigata University, 1-757 Asahimachi-dori, Niigata, Japan
| |
Collapse
|
15
|
Yaoita E, Yoshida Y, Nameta M, Zhang Y, Fujinaka H, Magdeldin S, Xu B, Yamamoto T. Heparin increasing podocyte-specific gene expressions. Nephrology (Carlton) 2014; 19:195-201. [DOI: 10.1111/nep.12207] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 01/12/2014] [Indexed: 01/20/2023]
Affiliation(s)
- Eishin Yaoita
- Department of Structural Pathology, Institute of Nephrology; Niigata University Graduate School of Medical and Dental Sciences; Niigata Japan
| | - Yutaka Yoshida
- Department of Structural Pathology, Institute of Nephrology; Niigata University Graduate School of Medical and Dental Sciences; Niigata Japan
| | - Masaaki Nameta
- Cooperative Laboratory of Electron Microscopy; Niigata University; Niigata Japan
| | - Ying Zhang
- Department of Structural Pathology, Institute of Nephrology; Niigata University Graduate School of Medical and Dental Sciences; Niigata Japan
| | - Hidehiko Fujinaka
- Institute for Clinical Research; Niigata National Hospital; Niigata Japan
| | - Sameh Magdeldin
- Department of Structural Pathology, Institute of Nephrology; Niigata University Graduate School of Medical and Dental Sciences; Niigata Japan
- Department of Physiology, Faculty of Veterinary Medicine; Suez Canal University; Ismailia Egypt
| | - Bo Xu
- Department of Structural Pathology, Institute of Nephrology; Niigata University Graduate School of Medical and Dental Sciences; Niigata Japan
| | - Tadashi Yamamoto
- Department of Structural Pathology, Institute of Nephrology; Niigata University Graduate School of Medical and Dental Sciences; Niigata Japan
| |
Collapse
|
16
|
Magdeldin S, Yamamoto K, Yoshida Y, Xu B, Zhang Y, Fujinaka H, Yaoita E, Yates JR, Yamamoto T. Deep proteome mapping of mouse kidney based on OFFGel prefractionation reveals remarkable protein post- translational modifications. J Proteome Res 2014; 13:1636-46. [PMID: 24495006 PMCID: PMC3993965 DOI: 10.1021/pr401122m] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Abstract
![]()
Performing a comprehensive
nonbiased proteome analysis is an extraordinary
challenge due to sample complexity and wide dynamic range, especially
in eukaryotic tissues. Thus, prefractionation steps conducted prior
to mass spectrometric analysis are critically important to reduce
complex biological matrices and allow in-depth analysis. Here we demonstrated
the use of OFFGel prefractionation to identify more low abundant and
hydrophobic proteins than in a nonfractionated sample. Moreover, OFFGel
prefractionation of a kidney protein sample was able to unveil protein
functional relevance by detecting PTMs, especially when prefractionation
was augmented with a targeted enrichment strategy such as TiO2 phospho-enrichment. The OFFGel-TiO2 combination
used in this study was comparable to other global phosphoproteomics
approaches (SCX-TiO2, ERLIC-TiO2, or HILIC-TiO2). The detailed mouse kidney proteome with the phosphopeptide
enrichment presented here serves as a useful platform for a better
understanding of how the renal protein modification machinery works
and, ultimately, will contribute to our understanding of pathological
processes as well as normal physiological renal functions.
Collapse
Affiliation(s)
- Sameh Magdeldin
- Department of Structural Pathology, Institute of Nephrology, Graduate School of Medical and Dental Sciences, Niigata University , Niigata, Japan
| | | | | | | | | | | | | | | | | |
Collapse
|
17
|
Iida T, Fujinaka H, Xu B, Zhang Y, Magdeldin S, Nameta M, Liu Z, Yoshida Y, Yaoita E, Tomizawa S, Saito A, Yamamoto T. Decreased urinary calbindin 1 levels in proteinuric rats and humans with distal nephron segment injuries. Clin Exp Nephrol 2013; 18:432-43. [DOI: 10.1007/s10157-013-0835-3] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/26/2012] [Accepted: 06/21/2013] [Indexed: 01/20/2023]
|
18
|
Yoshida Y, Nameta M, Kuwano M, Zhang Y, Bo X, Magdeldin S, Cui Z, Fujinaka H, Yaoita E, Tomonaga T, Yamamoto T. Proteomic approach to human kidney glomerulus prepared by laser microdissection from frozen biopsy specimens: exploration of proteome after removal of blood-derived proteins. Proteomics Clin Appl 2013; 6:412-7. [PMID: 22927354 DOI: 10.1002/prca.201200016] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
PURPOSE Abundance of blood-derived proteins in glomeruli prepared by laser microdissection from human kidney biopsy specimens has hampered in-depth proteomic analysis of glomeruli. We attempted to establish experimental platform for in-depth proteomic analysis of glomeruli by removal of blood-derived proteins from frozen biopsy samples. EXPERIMENTAL DESIGN Frozen sections of biopsy samples were exposed to repeated PBS washes prior to laser microdissection to remove blood-derived proteins, and glomerular dissectants were analyzed by MS. The depth of proteomic analysis was evaluated by dynamic range of identified proteins and detection of low-abundance proteins. RESULTS Two times PBS washes of frozen sections effectively eliminated blood-derived proteins in laser-microdissected glomeruli and gave an increased number of identified proteins. Analysis of glomeruli from single specimens by a linear ion trap-Orbitrap mass analyzer generated nonredundant, high-confidence datasets of more than 400 identified proteins with high reproducibility, which attained to a considerable depth of the glomerulus proteome as revealed by a wide dynamic range and identification of low-abundance proteins. CONCLUSIONS AND CLINICAL RELEVANCE Implementation of washing of frozen section with PBS successfully removed blood-derived proteins and resulted in an in-depth proteomic analysis of laser-microdissected glomeruli, suggesting applicability to clinical study.
Collapse
Affiliation(s)
- Yutaka Yoshida
- Department of Structural Pathology, Institute of Nephrology, Graduate School of Medical and Dental Sciences, Niigata University, Japan.
| | | | | | | | | | | | | | | | | | | | | |
Collapse
|
19
|
Cui Z, Yoshida Y, Xu B, Zhang Y, Nameta M, Magdeldin S, Makiguchi T, Ikoma T, Fujinaka H, Yaoita E, Yamamoto T. Profiling and annotation of human kidney glomerulus proteome. Proteome Sci 2013; 11:13. [PMID: 23566277 PMCID: PMC3639854 DOI: 10.1186/1477-5956-11-13] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2012] [Accepted: 04/02/2013] [Indexed: 01/10/2023] Open
Abstract
Background The comprehensive analysis of human kidney glomerulus we previously performed using highly purified glomeruli, provided a dataset of 6,686 unique proteins representing 2,966 distinct genes. This dataset, however, contained considerable redundancy resulting from identification criteria under which all the proteins matched with the same set of peptides and its subset were reported as identified proteins. In this study we reanalyzed the raw data using the Mascot search engine and highly stringent criteria in order to select proteins with the highest scores matching peptides with scores exceeding the “Identity Threshold” and one or more unique peptides. This enabled us to exclude proteins with lower scores which only matched the same set of peptides or its subset. This approach provided a high-confidence, non-redundant dataset of identified proteins for extensive profiling, annotation, and comparison with other proteome datasets that can provide biologically relevant knowledge of glomerulus proteome. Results Protein identification using the Mascot search engine under highly stringent, computational strategy generated a non-redundant dataset of 1,817 proteins representing 1,478 genes. These proteins were represented by 2-D protein array specifying observed molecular weight and isoelectric point range of identified proteins to demonstrate differences in the observed and calculated physicochemical properties. Characteristics of glomerulus proteome could be illustrated by GO analysis and protein classification. The depth of proteomic analysis was well documented via comparison of the dynamic range of identified proteins with other proteomic analyses of human glomerulus, as well as a high coverage of biologically important pathways. Comparison of glomerulus proteome with human plasma and urine proteomes, provided by comprehensive analysis, suggested the extent and characteristics of proteins contaminated from plasma and excreted into urine, respectively. Among the latter proteins, several were demonstrated to be highly or specifically localized in the glomerulus by cross-reference analysis with the Human Protein Atlas database, and could be biomarker candidates for glomerular injury. Furthermore, comparison of ortholog proteins identified in human and mouse glomeruli suggest some biologically significant differences in glomerulus proteomes between the two species. Conclusions A high-confidence, non-redundant dataset of proteins created by comprehensive proteomic analysis could provide a more extensive understanding of human glomerulus proteome and could be useful as a resource for the discovery of biomarkers and disease-relevant proteins.
Collapse
Affiliation(s)
- Zenyui Cui
- Department of Structural Pathology, Institute of Nephrology, Graduate School of Medical and Dental Sciences, Niigata University, Niigata, Japan.
| | | | | | | | | | | | | | | | | | | | | |
Collapse
|
20
|
Yoshida Y, Miyamoto M, Taguchi I, Xu B, Zhang Y, Yaoita E, Fujinaka H, Yamamoto T. Human kidney glomerulus proteome and biomarker discovery of kidney diseases. Proteomics Clin Appl 2012; 2:420-7. [PMID: 21136843 DOI: 10.1002/prca.200780016] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
The kidney glomerulus is the site of plasma filtration and production of primary urine in the kidney. The structure not only plays a pivotal role in ultrafiltration of plasma into urine but also is the locus of kidney diseases progressing to chronic renal failure. Patients afflicted with these glomerular diseases frequently progress to irreversible loss of renal function and inevitably require replacement therapies. The diagnosis and treatment of glomerular diseases are now based on clinical manifestations, urinary protein excretion level, and renal pathology of needle biopsy specimens. The molecular mechanisms underlying the progression of glomerular diseases are still obscure despite a great number of clinical and experimental studies. Proteomics is a particularly promising approach for the discovery of proteins relevant to physiological and pathophysiological processes, and has been recently employed in nephrology. Although until now most efforts of proteomic analysis have been conducted with urine, the biological fluid that is easily collected without invasive procedures, proteomic analysis of the glomerulus, the tissue most proximal to the disease loci, is the most straightforward approach. In this review, we attempt to outline the current status of clinical proteomics of the glomerulus and provide a perspective of protein biomarker discovery of glomerular diseases.
Collapse
Affiliation(s)
- Yutaka Yoshida
- Department of Structural Pathology, Institute of Nephrology, Graduate School of Medical and Dental Sciences, Niigata University, Niigata, Japan.
| | | | | | | | | | | | | | | |
Collapse
|
21
|
Magdeldin S, Yoshida Y, Li H, Maeda Y, Yokoyama M, Enany S, Zhang Y, Xu B, Fujinaka H, Yaoita E, Sasaki S, Yamamoto T. Murine colon proteome and characterization of the protein pathways. BioData Min 2012; 5:11. [PMID: 22929016 PMCID: PMC3497880 DOI: 10.1186/1756-0381-5-11] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2012] [Accepted: 07/24/2012] [Indexed: 01/06/2023] Open
Abstract
Background Most of the current proteomic researches focus on proteome alteration due to pathological disorders (i.e.: colorectal cancer) rather than normal healthy state when mentioning colon. As a result, there are lacks of information regarding normal whole tissue- colon proteome. Results We report here a detailed murine (mouse) whole tissue- colon protein reference dataset composed of 1237 confident protein (FDR < 2) with comprehensive insight on its peptide properties, cellular and subcellular localization, functional network GO annotation analysis, and its relative abundances. The presented dataset includes wide spectra of pI and Mw ranged from 3–12 and 4–600 KDa, respectively. Gravy index scoring predicted 19.5% membranous and 80.5% globularly located proteins. GO hierarchies and functional network analysis illustrated proteins function together with their relevance and implication of several candidates in malignancy such as Mitogen- activated protein kinase (Mapk8, 9) in colorectal cancer, Fibroblast growth factor receptor (Fgfr 2), Glutathione S-transferase (Gstp1) in prostate cancer, and Cell division control protein (Cdc42), Ras-related protein (Rac1,2) in pancreatic cancer. Protein abundances calculated with 3 different algorithms (NSAF, PAF and emPAI) provide a relative quantification under normal condition as guidance. Conclusions This highly confidence colon proteome catalogue will not only serve as a useful reference for further experiments characterizing differentially expressed proteins induced from diseased conditions, but also will aid in better understanding the ontology and functional absorptive mechanism of the colon as well.
Collapse
Affiliation(s)
- Sameh Magdeldin
- Department of Structural Pathology, Institute of Nephrology, Graduate School of Medical and Dental Sciences, Niigata University, Niigata, Japan.
| | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
22
|
Xu B, Zhang Y, Zhao Z, Yoshida Y, Magdeldin S, Fujinaka H, Ismail TA, Yaoita E, Yamamoto T. Usage of electrostatic eliminator reduces human keratin contamination significantly in gel-based proteomics analysis. J Proteomics 2011; 74:1022-9. [PMID: 21406260 DOI: 10.1016/j.jprot.2011.03.001] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2010] [Revised: 02/14/2011] [Accepted: 03/01/2011] [Indexed: 11/27/2022]
Affiliation(s)
- Bo Xu
- Department of Structural Pathology, Institute of Nephrology, Graduate School of Medical and Dental Sciences, Niigata University, Niigata, Japan.
| | | | | | | | | | | | | | | | | |
Collapse
|
23
|
Fujinaka H, Katsuyama K, Yamamoto K, Nameta M, Yoshida Y, Yaoita E, Tomizawa S, Yamamoto T. Expression and localization of insulin-like growth factor binding proteins in normal and proteinuric kidney glomeruli. Nephrology (Carlton) 2011; 15:700-9. [PMID: 21040165 DOI: 10.1111/j.1440-1797.2010.01285.x] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
AIM Insulin-like growth factor I (IGF-I) acts on target cells in an endocrine and/or local manner through the IGF-I receptor (IGF-IR), and its actions are modulated by multiple IGF binding proteins (IGFBP). To elucidate the roles of local IGFBP in kidney glomeruli, the expression and localization of their genes were examined and compared with normal and proteinuric kidney glomeruli. METHODS A cDNA microarray database (MAd-761) was constructed using human kidney glomeruli and cortices. The gene expression levels of IGF-I, IGF-1R and IGFBP (1-10) were examined in glomeruli and cortices by polymerase chain reaction (PCR) and in situ hybridization (ISH), and the expression levels of IGFBP that were abundantly found in the glomerulus were compared between normal and proteinuric kidneys in rats and humans. RESULTS IGFBP-2, -7 and -8 were demonstrated to be abundantly and preferentially expressed in the glomerulus. In PCR, the expression levels of the IGFBP-2, -7, -8 and -10 genes in glomeruli were shown to have more than doubled compared with their levels in the cortices. In ISH, the IGFBP-2, -7, -8 and -10 genes were found to be localized in glomerular cells including podocytes, and their increased expression was observed in inflammatory glomeruli. IGF-I gene expression was localized in glomerular podocytes, whereas the IGF-IR gene was expressed in glomerular podocytes and cortical tubular cells. In nephrotic rats, the expression of the IGFBP-10 gene was increased in glomerular podocytes; however, the expression levels of IGFBP-2, -7 and -8 did not change. CONCLUSION IGFBP-2, -7, -8 and -10 are produced by normal and injured glomerular podocytes and may regulate local IGF-I actions in podocytes and/or cortical tubular cells in the kidney.
Collapse
Affiliation(s)
- Hidehiko Fujinaka
- Institute for Clinical Research, Niigata National Hospital, Kashiwazaki, Japan.
| | | | | | | | | | | | | | | |
Collapse
|
24
|
Sekiguchi S, Suzuki A, Asano S, Nishiwaki-Yasuda K, Shibata M, Nagao S, Yamamoto N, Matsuyama M, Sato Y, Yan K, Yaoita E, Itoh M. Phosphate overload induces podocyte injury via type III Na-dependent phosphate transporter. Am J Physiol Renal Physiol 2011; 300:F848-56. [PMID: 21307129 DOI: 10.1152/ajprenal.00334.2010] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
Uptake of P(i) at the cellular membrane is essential for the maintenance of cell viability. However, phosphate overload is also stressful for cells and can result in cellular damage. In the present study, we investigated the effects of the transgenic overexpression of type III P(i) transporter Pit-1 to explore the role of extracellular P(i) in glomerular sclerosis during chronic renal disease. Pit-1 transgenic (TG) rats showed progressive proteinuria associated with hypoalbuminemia and dyslipidemia. Ultrastructural analysis of TG rat kidney by transmission electron microscopy showed a diffuse effacement of the foot processes of podocytes and a thickening of the glomerular basement membrane, which were progressively exhibited since 8 wk after birth. TG rats died at 32 wk of age due to cachexia. At this time, more thickening of the glomerular basement membrane and segmental sclerosis were observed in glomeruli of the TG rats. Immunohistochemical examination using anti-connexin 43 and anti-desmin antibodies suggested the progressive injury of podocytes in TG rats. TG rats showed higher P(i) uptake in podocytes than wild-type rats, especially under low P(i) concentration. When 8-wk-old wild-type and TG rats were fed a 0.6% normal phosphate (NP) or 1.2% phosphate (HP) diet for 12 wk, HP diet-treated TG rats showed more progressive proteinuria and higher serum creatinine levels than NP diet-treated TG rats. In conclusion, our findings suggest that overexpression of Pit-1 in rats induces phosphate-dependent podocyte injury and damage to the glomerular barrier, which result in the progression of glomerular sclerosis in the kidney.
Collapse
Affiliation(s)
- Sahoko Sekiguchi
- Div. of Endocrinology and Metabolism, Dept. of Internal Medicine, Fujita Health Univ., Kutsukake, Toyoake, Aichi 470-1192, Japan.
| | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
25
|
Koda R, Zhao L, Yaoita E, Yoshida Y, Tsukita S, Tamura A, Nameta M, Zhang Y, Fujinaka H, Magdeldin S, Xu B, Narita I, Yamamoto T. Novel expression of claudin-5 in glomerular podocytes. Cell Tissue Res 2011; 343:637-48. [PMID: 21271259 DOI: 10.1007/s00441-010-1117-y] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2010] [Accepted: 12/08/2010] [Indexed: 12/18/2022]
Abstract
Tight junctions are the main intercellular junctions of podocytes of the renal glomerulus under nephrotic conditions. Their requisite components, claudins, still remain to be identified. We have measured the mRNA levels of claudin subtypes by quantitative real-time PCR using isolated rat glomeruli. Claudin-5 was found to be expressed most abundantly in glomeruli. Mass spectrometric analysis of membrane preparation from isolated glomeruli also confirmed only claudin-5 expression without any detection of other claudin subtypes. In situ hybridization and immunolocalization studies revealed that claudin-5 was localized mainly in glomeruli where podocytes were the only cells expressing claudin-5. Claudin-5 protein was observed on the entire surface of podocytes including apical and basal domains of the plasma membrane in the normal condition and was inclined to be concentrated on tight junctions in puromycin aminonucleoside nephrosis. Total protein levels of claudin-5 in isolated glomeruli were not significantly upregulated in the nephrosis. These findings suggest that claudin-5 is a main claudin expressed in podocytes and that the formation of tight junctions in the nephrosis may be due to local recruitment of claudin-5 rather than due to total upregulation of the claudin protein levels.
Collapse
Affiliation(s)
- Ryo Koda
- Department of Structural Pathology, Institute of Nephrology, Niigata University Graduate School of Medical and Dental Sciences, 1-757 Asahimachi-dori, Niigata 951-8510, Japan
| | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
26
|
Magdeldin S, Li H, Yoshida Y, Satokata I, Maeda Y, Yokoyama M, Enany S, Zhang Y, Xu B, Fujinaka H, Yaoita E, Yamamoto T. Differential proteomic shotgun analysis elucidates involvement of water channel aquaporin 8 in presence of α-amylase in the colon. J Proteome Res 2010; 9:6635-46. [PMID: 20939500 DOI: 10.1021/pr100789v] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
Aquaporin (AQP) family plays a pivotal role in fluid secretion and absorption, especially in the digestive system and secretory glands. Within this family, AQP8 was reported to be widely expressed in the epithelia of the digestive tract, liver, and pancreas. In two parallel experimental platforms with different analytical and comparative approaches, in-gel tryptic digestion with macro-embedded spreadsheet analysis and in-solution tryptic digestion with LC-MS alignment based approach, we compared wild-type and AQP8 knockout mice colon proteomes. Shared result between both experiments revealed down-regulation of α-amylase 2 in AQP8-deleted mice model. Verification on both transcriptional and translational levels confirmed the involvement of AQP8 in α-amylase 2 regulation. Given the profound role of AQP8 as a water and solutes transporter, it might be important in modulating α-amylase 2 synthesis by colonic epithelial cells as well. Here, we also proved the capability of our coupled approaches for selecting the most reliable and significant candidates, an applicable process for initial screening of biological biomarkers in complex specimens and tissue extracts.
Collapse
Affiliation(s)
- Sameh Magdeldin
- Department of Structural Pathology, Institute of Nephrology, Graduate School of Medical and Dental Sciences, Niigata University, Japan.
| | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
27
|
Yaoita E, Karasawa T, Nameta M, Yamamoto T, Uchiyama M, Nishimura H. Adherens junction proteins in glomerular podocytes of quail kidney. FASEB J 2010. [DOI: 10.1096/fasebj.24.1_supplement.813.15] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
| | - Tamaki Karasawa
- Dept. PediatricsNiigata Univ. Grad. Sch. Med. Dent.NiigataJapan
| | | | | | - Makoto Uchiyama
- Dept. PediatricsNiigata Univ. Grad. Sch. Med. Dent.NiigataJapan
| | | |
Collapse
|
28
|
Enany S, Yaoita E, Yoshida Y, Enany M, Yamamoto T. Molecular characterization of Panton-Valentine leukocidin-positive community-acquired methicillin-resistant Staphylococcus aureus isolates in Egypt. Microbiol Res 2010; 165:152-62. [DOI: 10.1016/j.micres.2009.03.005] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2009] [Revised: 03/23/2009] [Accepted: 03/29/2009] [Indexed: 11/16/2022]
|
29
|
Zhang Y, Yoshida Y, Nameta M, Xu B, Taguchi I, Ikeda T, Fujinaka H, Magdeldin S, Mohamed SM, Tsukaguchi H, Harita Y, Yaoita E, Yamamoto T. Glomerular proteins related to slit diaphragm and matrix adhesion in the foot processes are highly tyrosine phosphorylated in the normal rat kidney. Nephrol Dial Transplant 2010; 25:1785-95. [PMID: 20067908 DOI: 10.1093/ndt/gfp697] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
BACKGROUND Tyrosine phosphorylation of proteins has been a focus of extensive studies since it plays crucial roles in regulation of diverse biological reactions. To understand the involvement of tyrosine phosphorylation in kidney functions, a comprehensive proteomic study for tyrosine-phosphorylated proteins was performed in the normal rat kidney. METHODS Two-dimensional gel electrophoresis and immunoprecipitation using anti-phosphotyrosine antibodies were employed to detect tyrosine-phosphorylated proteins. The proteins were analysed by mass spectrometry and validated by immunological analyses using specific antibodies. RESULTS Most of tyrosine-phosphorylated proteins were confined to the glomerulus and predominantly localized along the glomerular capillary wall, especially in the foot processes of podocytes. Our systematic proteomic analysis identified nephrin, SHPS-1 (tyrosine-protein phosphatase non-receptor-type substrate 1), FAK1 and paxillin as major tyrosine-phosphorylated proteins and Neph1, talin and vinculin as minor tyrosine-phosphorylated proteins. In the present study, SHPS-1 was identified as a novel tyrosine-phosphorylated protein in the glomerulus and was also predominantly localized at the foot processes. Mass spectrometric analysis identified in vivo phosphorylation sites of SHPS-1 on Y460, Y477 and Y501. CONCLUSION This study identified tyrosine-phosphorylated proteins in normal rat kidney, which were prominently rich in the glomerulus and localized at the podocyte foot processes. These proteins were categorized as cell-to-cell or cell-to-matrix adhesion complex-related molecules, suggesting their pivotal roles in the glomerular ultrafiltration.
Collapse
Affiliation(s)
- Ying Zhang
- Department of Structural Pathology, Institute of Nephrology, Graduate School of Medical and Dental Sciences, Niigata University, Niigata, Japan
| | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
30
|
Katsuyama K, Fujinaka H, Yamamoto K, Nameta M, Yaoita E, Yoshida Y, Tomizawa S, Uchiyama M, Yamamoto T. Expression of the chemokine fractalkine (FKN/CX3CL1) by podocytes in normal and proteinuric rat kidney glomerulus. Nephron Clin Pract 2009; 113:e45-56. [PMID: 19590241 DOI: 10.1159/000228408] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2008] [Accepted: 04/09/2009] [Indexed: 11/19/2022] Open
Abstract
BACKGROUND/AIMS A chemokine fractalkine (FKN/CX3CL1) is induced primarily by endothelial cells and accumulates inflammatory cells via its receptor CX3CR1. Since glomerular preferential expression of FKN/CX3CL1 gene was reported in normal human kidney, we presumed FKN/CX3CL1 might play some roles in glomerular physiology. The purpose of this study is to examine the expression and localization of FKN/CX3CL1 in normal and proteinuric glomeruli. METHODS Normal and proteinuric rat kidneys were studied. The gene and protein expressions of FKN/CX3CL1 and CX3CR1 were examined by real-time RT-PCR, in situ hybridization and immunohistochemistry, Western blotting. RESULTS By real-time RT-PCR, glomerular preferential expression of FKN/CX3CL1 was confirmed, whereas CX3CR1 was detected in glomeruli and cortices. The localization of FKN/CX3CL1 gene and protein were demonstrated in glomerular cells including podocytes. In nephrotic puromycin aminonucleoside (PAN) nephrosis glomeruli, increased expression of FKN/CX3CL1 in podocyte was shown by immunohistochemistry. Western blotting showed that in nephrotic glomeruli, the membrane-anchored form of FKN/CX3CL1 was increased while the soluble form was decreased. CONCLUSION The expression of FKN/CX3CL1 in normal podocytes and the increased expression of the membrane-anchored form in nephrotic glomeruli strongly suggest that FKN/CX3CL1 may play roles in glomerular physiology such as maintaining glomerular filtration barrier.
Collapse
Affiliation(s)
- Koichi Katsuyama
- Department of Structural Pathology, Institute of Nephrology, Niigata University, Niigata, Japan
| | | | | | | | | | | | | | | | | |
Collapse
|
31
|
Nameta M, Yaoita E, Kato N, Zhao L, Zhang Y, Fujinaka H, Xu B, Yoshida Y, Yamamoto T. Mesangial Cells Connected by the N-Cadherin-Catenin System in the Rat Kidney. ACTA ACUST UNITED AC 2009; 112:e92-8. [DOI: 10.1159/000224797] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2008] [Accepted: 01/06/2009] [Indexed: 11/19/2022]
|
32
|
Karasawa T, Nameta M, Yaoita E, Yang Y, Kawachi H, Yamamoto T, Uchiyama M, Nishimura H. Glomerular podocytes in developing quail kidney. FASEB J 2009. [DOI: 10.1096/fasebj.23.1_supplement.778.15] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Tamaki Karasawa
- Department of PediatricsNiigata University Medical and Dental HospitalNiigataJapan
| | | | - Eishin Yaoita
- Niigata University Institute of NephrologyNiigataJapan
| | - Yimu Yang
- PhysiologyUniversity of Tennessee HSCMemphisTN
| | | | | | - Makoto Uchiyama
- Department of PediatricsNiigata University Medical and Dental HospitalNiigataJapan
| | | |
Collapse
|
33
|
Elewa S, Ikeda T, Ikei J, Zhang Y, Xu B, Nameta M, Fujinaka H, Yoshida Y, Yaoita E, Yamamoto T. Dietary supplementation with arachidonic acid but not eicosapentaenoic or docosahexaenoic acids alter lipids metabolism in C57BL/6J mice. Gen Physiol Biophys 2009; 28:266-75. [DOI: 10.4149/gpb_2009_03_266] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
|
34
|
Cuellar LM, Fujinaka H, Yamamoto K, Miyamoto M, Tasaki M, Zhao L, Tamer I, Yaoita E, Yoshida Y, Yamamoto T. Identification and localization of novel genes preferentially expressed in human kidney glomerulus. Nephrology (Carlton) 2008; 14:94-104. [PMID: 19019172 DOI: 10.1111/j.1440-1797.2008.01009.x] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
AIM To find novel genes abundantly and preferentially expressed in human glomerulus, we constructed a glomerular cDNA library and verified the reliability of our database by comparison with the Stanford Microarray Database (SMD), followed by reverse transcription polymerase chain reaction (RT-PCR) and in situ hybridization (ISH). METHODS RNA was extracted from normal human glomeruli, and the cDNA library was constructed by plasmid cloning. Out of 5 x 10(3) clones from the library, 91 UniGene clusters of more than three clones were identified as 'glomerular-abundant genes'. All these genes were referred to the SMD, and 18 genes were defined as 'glomerular preferential genes'. Four unknown genes -IFI27, CRHBP, FLJ10154 and SEMA5B- were selected for RT-PCR to compare expression in the glomerulus with that in the cortex and medulla, and for ISH to examine glomerular localization. Also, three unknown genes that were glomerular abundant but not listed in the SMD -DDX5, HSPC138, and MGC10940- were selected for RT-PCR and ISH. Finally, a kidney biopsy specimen of crescentic glomerulonephritis was used for ISH to examine glomerular expression for CRHBP mRNA. RESULTS Among the selected seven glomerular-abundant genes, six were confirmed as 'glomerular preferential genes' by RT-PCR. By ISH, all these genes were demonstrated in podocytes. The expression of CRHBP mRNA in a single living podocyte was not changed between normal and crescentic glomerulus. CONCLUSION Glomerular preferential expression and podocyte localization of these novel genes have been demonstrated for the first time. Because some of these genes were not listed in SMD, our database can be a useful tool to find novel human glomerular genes.
Collapse
Affiliation(s)
- Lino Muñoz Cuellar
- Department of Structural Pathology, Institute of Nephrology, Niigata University, Japan
| | | | | | | | | | | | | | | | | | | |
Collapse
|
35
|
Zhao L, Yaoita E, Nameta M, Zhang Y, Cuellar LM, Fujinaka H, Xu B, Yoshida Y, Hatakeyama K, Yamamoto T. Claudin-6 localized in tight junctions of rat podocytes. Am J Physiol Regul Integr Comp Physiol 2008; 294:R1856-62. [PMID: 18367650 DOI: 10.1152/ajpregu.00862.2007] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Tight junctions rarely exist in podocytes of the normal renal glomerulus, whereas they are the main intercellular junctions of podocytes in nephrosis and in the early stage of development. Claudins have been identified as tight junction-specific integral membrane proteins. Those of podocytes, however, remain to be elucidated. In the present study, we investigated the expression and localization of claudin-6 in the rat kidney, especially in podocytes. Western blot analysis and RT-PCR revealed that the neonatal kidney expressed much higher levels of claudin-6 than the adult kidney. Immunofluorescence microscopy showed intense claudin-6 staining in most of the tubules and glomeruli in neonates. The staining in tubules declined distinctly in adults, whereas staining in glomeruli was well preserved during development. Claudin-6 in glomeruli was distributed along the glomerular capillary wall and colocalized with zonula occludens-1. The staining became conspicuous after kidney perfusion with protamine sulfate (PS) to increase tight junctions in podocytes. Immunoelectron microscopy showed that immunogold particles for claudin-6 were accumulated at close cell-cell contact sites of podocytes in PS-perfused kidneys, whereas a very limited number of immunogold particles were detected, mainly on the basal cell membrane and occasionally at the slit diaphragm and close cell-cell contact sites in normal control kidneys. In puromycin aminonucleoside nephrosis, immunogold particles were also found mainly at cell-contact sites of podocytes. These findings indicate that claudin-6 is a transmembrane protein of tight junctions in podocytes during development and under pathological conditions.
Collapse
Affiliation(s)
- Linning Zhao
- Department of Structural Pathology, Institute of Nephrology, Niigata University Graduate School of Medical and Dental Sciences, 1-757 Asahimachi-dori, Niigata, Japan
| | | | | | | | | | | | | | | | | | | |
Collapse
|
36
|
Abstract
With the completion or almost completion of genome sequences of many organisms in combination with the tremendous development of mass spectrometric analysis of proteins, several comprehensive proteomic studies, targeting whole organisms, body fluids, organs, tissues, cells, cellular organelles, or functional protein complexes, have produced valuable resources that can be shared and retrieved. In the present review, we provide current concept of construction of protein databases with special emphasis on high-throughput identification of protein using mass spectrometry, annotations, computational tools, and search engines to retrieve information of the identified proteins. We then update the current status of available protein databases of kidney and urine proteomes.
Collapse
Affiliation(s)
- Yutaka Yoshida
- Department of Structural Pathology, Institute of Nephrology, Graduate School of Medical and Dental Sciences, Niigata University, Niigata, Japan
| | | | | | | | | |
Collapse
|
37
|
Miyamoto M, Yoshida Y, Taguchi I, Nagasaka Y, Tasaki M, Zhang Y, Xu B, Nameta M, Sezaki H, Cuellar LM, Osawa T, Morishita H, Sekiyama S, Yaoita E, Kimura K, Yamamoto T. In-depth proteomic profiling of the normal human kidney glomerulus using two-dimensional protein prefractionation in combination with liquid chromatography-tandem mass spectrometry. J Proteome Res 2007; 6:3680-90. [PMID: 17711322 DOI: 10.1021/pr070203n] [Citation(s) in RCA: 50] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
The kidney glomerulus plays a pivotal role in ultrafiltration of plasma into urine and also is the locus of kidney disease progressing to chronic renal failure. We have focused proteomic analysis on the glomerulus that is most proximal to the disease locus. In the present study, we aimed to provide a confident, in-depth profiling of the glomerulus proteome. The glomeruli were highly purified from the kidney cortex from a male, 68-year-old patient who underwent nephroureterectomy due to ureter carcinoma. The patient was normal in clinical examinations including serum creatinine and urea levels and liver function, and did not receive any chemotherapy and radiotherapy. The cortical tissue was histologically normal, and no significant deposition of immunoglobulins and complement C3 was observed. We employed a novel strategy of protein separation using 1D (SDS-PAGE) and 2D (solution-phase IEF in combination with SDS-PAGE) prefractionation prior to the shotgun analysis with LC-MS/MS. The protein prefractionation produced 90 fractions, and eventually provided a confident set of identified proteins consisting of 6686 unique proteins (3679 proteins with two or more peptide matches and 3007 proteins with one peptide match), representing 2966 distinct genes. All the identified proteins were annotated and classified in terms of molecular function and biological process, compiled into 1D and 2D protein arrays, consisting of 15 and 75 sections, corresponding to the protein fractions which were defined by MW and pI range, and deposited on a Web-based database (http://www.hkupp.org). The most remarkable feature of the glomerulus proteome was a high incidence of identification of cytoskeleton-related proteins, presumably reflecting the well-developed, cytoskeletal organization of glomerular cells related to their physiological functions.
Collapse
Affiliation(s)
- Masahito Miyamoto
- Department of Structural Pathology, Institute of Nephrology, Graduate School of Medical and Dental Sciences, Niigata University, Niigata, Japan
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
38
|
Shono A, Tsukaguchi H, Yaoita E, Nameta M, Kurihara H, Qin XS, Yamamoto T, Doi T. Podocin participates in the assembly of tight junctions between foot processes in nephrotic podocytes. J Am Soc Nephrol 2007; 18:2525-33. [PMID: 17675666 DOI: 10.1681/asn.2006101084] [Citation(s) in RCA: 40] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022] Open
Abstract
The predominant type of cellular junction between normal podocyte foot processes is the slit diaphragm. Under nephrotic conditions,however, foot process effacement leads to the loss of slit diaphragms and the new formationof tight junctions composed of the proteins coxsackievirus and adenovirus receptor (CAR) and zonula occludens 1 (ZO-1). Podocin, a protein that plays a key role in maintaining the integrity of the slit diaphragm, has also been localized to these tight junctions, but its function at this site is unknown. In this study, we confirmed that podocin colocalizes with CAR and ZO-1 at the tight junction between foot processes in nephrotic rats. Using primary cultures of rat podocytes, as well as cell lines that co-expressed podocin and CAR, we observed that podocin was recruited to sites of cell-cell contact and that it co-localized with CAR and ZO-1. Immunoprecipitation suggested that these three junctional proteins from a multi-protein complex. Consistent with this, we found that podociin facilitated the coalescence of preassembled lipid rafts containing CAR and restricted their lateral mobility, the latter likely a result of dynamic actin reorganization and subsequent tethering of CAR-podocin complexes to the cytoskeleton. In conclusion, in addition to serving as a structural protein of the slit diaphragm of normal podocytes, our data suggest that podocin may also serve as a scaffold that links tight junction proteins to the actin cytoskeleton in nephrotic foot processes.
Collapse
Affiliation(s)
- Akemi Shono
- Department of Clinical Biology and Medicine, The University of Tokushima Graduate School of Medical Sciences, 3-18-15 Kuramoto, Tokushima, 770-0042, Japan
| | | | | | | | | | | | | | | |
Collapse
|
39
|
Fujinaka H, Yamamoto T, Feng L, Nameta M, Garcia G, Chen S, El-shemi AA, Ohshiro K, Katsuyama K, Yoshida Y, Yaoita E, Wilson CB. Anti-perforin antibody treatment ameliorates experimental crescentic glomerulonephritis in WKY rats. Kidney Int 2007; 72:823-30. [PMID: 17622272 DOI: 10.1038/sj.ki.5002424] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
The depletion of CD8+ cells has been shown to prevent the initiation and progression of antiglomerular basement membrane (GBM) crescentic glomerulonephritis (GN) in Wistar-Kyoto (WKY) rats. In this study, we asked whether CD8+ cells produce their effects by perforin/granzyme-mediated or by Fas ligand (FasL)-mediated pathways. The glomerular mRNA expression of perforin and granzyme B corresponded with the number of CD8+ cells, whereas that of granzyme A, Fas, and FasL did not. The enhanced mRNA level of perforin and granzyme B was not evident in CD8+-depleted rats. The number of apoptotic cells in the glomeruli was significantly increased at day 3. Perforin mRNA was found in cells infiltrating the glomerulus by in situ hybridization and by using dual-staining immunohistochemistry perforin protein was found in glomerular CD8+ cells. We found that perforin was readily visualized at the inner surface of the glomerular capillaries by immunoelectron microscopy. Based on these results, we treated animals with a perforin antibody in vivo and found that it significantly reduced the amount of proteinuria, frequency of crescentic glomeruli, and the number of glomerular monocytes and macrophages, although the number of glomerular CD8+ cells was not changed. Our results suggest that CD8+ cells play a role in glomerular injury as effector cells in part through a perforin/granzyme-mediated pathway in the anti-GBM WKY rat model of crescentic GN.
Collapse
Affiliation(s)
- H Fujinaka
- Department of Structural Pathology, Institute of Nephrology, Graduate School of Medical and Dental Sciences, Niigata University, Niigata, Japan.
| | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
40
|
Zou J, Chang TH, Chang H, Yaoita E, Yoshida Y, Nameta M, Yamamoto T, Jin X. Time course of expression of intermediate filament protein vimentin, nestin and desmin in rat renal glomerular injury. Chin Med J (Engl) 2007; 120:1203-5. [PMID: 17637254] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/16/2023] Open
Affiliation(s)
- Jun Zou
- Department of Pharmacy, School of Medical Sciences, Xiamen University, Xiamen 361005, China
| | | | | | | | | | | | | | | |
Collapse
|
41
|
Fujinaka H, Nameta M, Kovalenko P, Matsuki A, Kato N, Nishimoto G, Yoshida Y, Yaoita E, Naito M, Kihara I, Tomizawa S, Yamamoto T. Periglomerular accumulation of dendritic cells in rat crescentic glomerulonephritis. J Nephrol 2007; 20:357-63. [PMID: 17557270] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/15/2023]
Abstract
BACKGROUND An increased number of major histocompatibility complex (MHC) class II-positive cells (OX-6+ cells) were observed in the glomerulus and periglomerular interstitium during the course of anti-glomerular basement membrane (anti-GBM) crescentic glomerulonephritis (GN) in WKY rats. This study aimed to demonstrate that periglomerular OX-6+ cells are dendritic cells (DCs) and to clarify their roles in the pathogenesis of this GN. METHODS Kidney sections were stained with the OX-6 and the rat DC marker OX-62 by immunohistochemistry, and periglomerular OX-6+ cells were observed by immunoelectron microscopy. Renal mRNA expression for CXCL12 was examined by reverse transcriptase polymerase chain reaction (RT-PCR) and in situ hybridization, and that for IL-1beta was examined by in situ hybridization. RESULTS Immunohistochemistry revealed that most periglomerular OX-6+ cells in this GN were ED-1-negative. OX-62+ cells were observed sparsely in normal kidney interstitium, and considerably more frequently in periglomerular interstitium in this GN. Immunoelectron microscopy confirmed the periglomerular OX-6+ED-1- cells had DC morphology. The increased expression of CXCL12 mRNA in the diseased glomerulus was shown by RT-PCR. By in situ hybridization, CXCL12 mRNA-expressing glomerular cells were the parietal and visceral epithelial cells, which were close to the site of periglomerular OX-6+ cell localization. The intense expression of IL-1beta mRNA by periglomerular cells was demonstrated by in situ hybridization. CONCLUSIONS The periglomerular distribution of OX-6+ED-1- DCs was demonstrated in anti-GBM crescentic GN in WKY rats. These DCs might be accumulated in periglomerular interstitium by CXCL12, and play a role in the initiation and progression of this GN by producing IL-1beta.
Collapse
Affiliation(s)
- Hidehiko Fujinaka
- Department of Structural Pathology, Institute of Nephrology, Niigata University Graduate School of Medical and Dental Sciences, Niigata - Japan.
| | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
42
|
Gao SY, Li CY, Shimokawa T, Terashita T, Matsuda S, Yaoita E, Kobayashi N. Rho-family small GTPases are involved in forskolin-induced cell-cell contact formation of renal glomerular podocytes in vitro. Cell Tissue Res 2007; 328:391-400. [PMID: 17265067 DOI: 10.1007/s00441-006-0365-3] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2006] [Accepted: 12/05/2006] [Indexed: 01/01/2023]
Abstract
Intercellular adhesions between renal glomerular epithelial cells (also called podocytes) are necessary for the proper function of the glomerular filtration barrier. Although our knowledge of the molecular composition of podocyte cell-cell contact sites has greatly progressed, the underlying molecular mechanism regulating the formation of these cell-cell contacts remains largely unknown. We have used forskolin, an activator of adenylyl cyclase that elevates the level of intracellular cAMP, to investigate the effect of cAMP and three Rho-family small GTPases (RhoA, Cdc42, and Rac1) on the regulation of cell-cell contact formation in a murine podocyte cell line. Transmission electron microscopy and the immunostaining of cell adhesion molecules and actin-associated proteins have revealed a structural change at the site of cell-cell contact following forskolin treatment. The activity of the Rho-family small GTPases before and after forskolin treatment has been evaluated with a glutathione-S-transferase pull-down assay. Forskolin reinforces the integrity of cell-cell contacts, resulting in the closure of an intercellular adhesion zipper, accompanied by a redistribution of cell adhesion molecules and actin-associated proteins in a continuous linear pattern at cell-cell contacts. The Rho-family small GTPases Rac1 and Cdc42 are activated during closure of the adhesion zipper, whereas RhoA is suppressed. Thus, cAMP promotes the assembly of cell-cell contacts between podocytes via a mechanism that probably involves Rho-family small GTPases.
Collapse
Affiliation(s)
- Shuang-Yan Gao
- Department of Anatomy and Embryology, School of Medicine, Ehime University, To-on City, Ehime, Japan
| | | | | | | | | | | | | |
Collapse
|
43
|
Nishimoto G, Sasaki G, Yaoita E, Nameta M, Li H, Furuse K, Fujinaka H, Yoshida Y, Mitsudome A, Yamamoto T. Molecular characterization of water-selective AQP (EbAQP4) in hagfish: insight into ancestral origin of AQP4. Am J Physiol Regul Integr Comp Physiol 2007; 292:R644-51. [PMID: 16990491 DOI: 10.1152/ajpregu.00362.2006] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Hagfish ( Eptatretus burgeri) are agnathous and are the earliest vertebrates still in existence. Pavement cells adjacent to the mitochondria-rich cells show orthogonal arrays of particles (OAPs) in the gill of hagfish, a known ultrastructural morphology of aquaporin (AQP) in mammalian freeze-replica studies, suggesting that an AQP homolog exists in pavement cells. We therefore cloned water channels from hagfish gill and examined their molecular characteristics. The cloned AQP [ E. burgeri AQP4 (EbAQP4)] encodes 288 amino acids, including two NPA motifs and six transmembrane regions. The deduced amino acid sequence of EbAQP4 showed high homology to mammalian and avian AQP4 (rat, 44%; quail, 43%) and clustered with AQP4 subsets by the molecular phylogenetic tree. The osmotic water permeability of Xenopus oocytes injected with EbAQP4 cRNA increased eightfold compared with water-injected controls and was not reversibly inhibited by 0.3 mM HgCl2. EbAQP4 mRNA expression in the gill was demonstrated by the RNase protection assay; antibody raised against the COOH terminus of EbAQP4 also detected (by Western blot analysis) a major ∼31-kDa band in the gill. Immunohistochemistry and immunoelectron microscopy showed EbAQP4 localized along the basolateral membranes of gill pavement cells. In freeze-replica studies, OAPs were detected on the protoplasmic face of the split membrane comprising particles 5–6 nm long on the basolateral side of the pavement cells. These observations suggest that EbAQP4 is an ancestral water channel of mammalian AQP4 and plays a role in basolateral water transport in the gill pavement cells.
Collapse
Affiliation(s)
- Goro Nishimoto
- Department of Structural Pathology, Institute of Nephrology, Graduate School of Medical and Dental Sciences, Niigata University, 1-757 Asahimachi-dori, Niigata 951-8510, Japan.
| | | | | | | | | | | | | | | | | | | |
Collapse
|
44
|
Abstract
A gentle method to isolate glomeruli simply by cutting renal cortices without forced sieving was devised in our previous study of primary podocyte culture. Yields of glomeruli isolated by this method, however, were too small to perform subculture or biological assays. In the present study, we tried an isolation method with magnetic beads and collagenase to increase the yields. Rat kidneys were perfused with magnetic particles. Renal cortices were digested with collagenase and filtered. Utilizing magnetic particles trapped within glomeruli, glomeruli were collected by attractive power of a magnet and cultured. The number of glomeruli isolated from one adult rat was more than 20,000 and the purity was more than 97%. About half of them were attached to culture dishes and exhibited cellular outgrowths, which were identified as podocytes by their distinct staining for podocyte markers. After 3 days of primary culture, the cellular outgrowths were subcultured. Approximately 60 podocytes were obtained per attached glomerulus. Their significant expression of podocytes markers was demonstrated by immunostaining and quantitative reverse transcriptase-polymerase chain reaction. The isolation method with magnetic beads and collagenase provides a number of glomeruli suitable for primary podocyte culture.
Collapse
Affiliation(s)
- K Katsuya
- Department of Structural Pathology, Institute of Nephrology, Niigata University Graduate School of Medical and Dental Sciences, Niigata, Japan
| | | | | | | | | |
Collapse
|
45
|
Yaoita E, Yamamoto T. [Structure and function of collecting duct]. Nihon Rinsho 2006; 64 Suppl 2:98-102. [PMID: 16523868] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/07/2023]
Affiliation(s)
- Eishin Yaoita
- Department of Structural Pathology, Institute of Nephrology, Niigata University Graduate School of Medical and Dental Sciences
| | | |
Collapse
|
46
|
Zou J, Yaoita E, Watanabe Y, Yoshida Y, Nameta M, Li H, Qu Z, Yamamoto T. Upregulation of nestin, vimentin, and desmin in rat podocytes in response to injury. Virchows Arch 2006; 448:485-92. [PMID: 16418842 DOI: 10.1007/s00428-005-0134-9] [Citation(s) in RCA: 110] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2005] [Accepted: 11/15/2005] [Indexed: 01/25/2023]
Abstract
Podocytes in the renal glomerulus express unusual intermediate filament (IF) proteins for epithelial cells. To gain insight into the role of IF proteins in podocytes, we investigated the expression of nestin, vimentin, and desmin in puromycin aminonucleoside (PAN) nephrosis. A Western blot analysis for nestin, vimentin, and desmin demonstrated their exclusive expression in glomeruli and showed their increase in expression in nephrotic glomeruli. Immunolocalization studies showed nestin and vimentin to be located predominantly in the podocytes in both normal and nephrotic glomeruli and that enhancement of desmin staining only occurred in podocytes. A ribonuclease protection assay showed high levels of vimentin and nestin expression in normal glomeruli and an upregulation of all three IF transcripts in nephrotic glomeruli. One day after the PAN injection, however, the vimentin transcripts were found to already have significantly increased, whereas those of nestin or desmin showed no such increase. These findings indicate that podocytes express three IF proteins, namely, vimentin, desmin, and nestin, which are differentially regulated in response to injury. An upregulation of IF proteins may increase the mechanical stability of cells, thus enabling podocytes to undergo morphological changes on the tensile glomerular capillary wall.
Collapse
Affiliation(s)
- Jun Zou
- Department of Structural Pathology, Institute of Nephrology, Niigata University Graduate School of Medical and Dental Sciences, Niigata, Japan
| | | | | | | | | | | | | | | |
Collapse
|
47
|
Li H, Kamiie J, Morishita Y, Yoshida Y, Yaoita E, Ishibashi K, Yamamoto T. Expression and localization of two isoforms of AQP10 in human small intestine. Biol Cell 2005; 97:823-9. [PMID: 15898950 DOI: 10.1042/bc20040091] [Citation(s) in RCA: 44] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
BACKGROUND INFORMATION AQP10 (aquaporin 10) is a new member of water channels and two different transcripts have been reported. The difference between these transcripts is in the presence or the absence of an insertion of 475 nt, which leads to a translation frame shift resulting in a different termination of amino acid translation and synthesis of a shorter form of AQP10. Thus an AQP10 molecule deduced from the transcript with an insertion has a distinct C-terminus, different from that translated from the transcript without the insertion. In the present study, we investigated the expression and localization of these AQP10 isoforms. RESULTS Two transcripts were expressed in human duodenum and jejunum. Western-blot analysis using antibodies for these AQP10 isoforms immunoblotted two bands of approx. 35 and 30 kDa respectively. Immunohistochemistry and immunoelectron microscopy demonstrated localization of the AQP10 with an insertion in the capillary endothelium in villi of the small intestine and the isoform without the insertion in the gastro-entero-pancrestic endocrine cells. CONCLUSION The different forms of localization of the AQP10 isoforms indicate that they may play different roles in the proximal portion of human small intestine.
Collapse
Affiliation(s)
- Huiping Li
- Department of Structural Pathology, Institute of Nephrology, Graduate School of Medical and Dental Sciences, Niigata University, 1-757 Asahimachi-dori, Niigata 951-8510, Japan
| | | | | | | | | | | | | |
Collapse
|
48
|
Yaoita E, Kurihara H, Yoshida Y, Inoue T, Matsuki A, Sakai T, Yamamoto T. Role of Fat1 in cell-cell contact formation of podocytes in puromycin aminonucleoside nephrosis and neonatal kidney. Kidney Int 2005; 68:542-51. [PMID: 16014031 DOI: 10.1111/j.1523-1755.2005.00432.x] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Abstract
BACKGROUND Fat1 is a member of the cadherin superfamily characterized by its 34 cadherin repeats in the extracellular domain. Fat1 was originally found as a component of the slit diaphragm of podocytes, but its function in podocytes remains obscure. To gain insight into its role in podocytes, we expanded our study of Fat1 expression to puromycin aminonucleoside (PAN) nephrosis, the neonatal kidney, and the primary podocyte culture, where slit diaphragms are absent or disappear. METHODS Expression of Fat1 was examined in isolated glomeruli of PAN nephrosis by the ribonuclease protection assay and Western blot analysis and in the neonatal kidney by in situ hybridization. Fat1 localization in glomeruli and in the primary culture was confirmed by immunofluorescence or immunoelectron microscopy. RESULTS In PAN nephrotic rats, glomerular expression of Fat1 increased rather than decreased at both transcript and protein levels in comparison with normal rats. Immunofluorescence microscopy revealed distinct staining for Fat1 along the glomerular capillary wall, where nephrin staining was weakened or disappeared. Immunoelectron microscopy demonstrated significant accumulation of immunogold particles for Fat1 at intercellular junctions newly formed between podocytes in the nephrosis. In the primary culture of podocytes, Fat1 was mainly localized at cell-cell contact sites and in tips of cellular processes. In the neonatal kidney, immature podocytes expressed Fat1 more intensely than mature podocytes as shown by in situ hybridization. Double-labeled immunostaining using anti-pan cadherin antibody revealed that Fat1 in podocytes colocalized with cadherin in immature glomeruli, indicating that junctional complexes of developing podocytes contain Fat1. CONCLUSION These findings suggest that Fat1 may be a fundamental component of intercellular junctions of podocytes, and may be involved in the initial step of cell contacts of podocytes.
Collapse
Affiliation(s)
- Eishin Yaoita
- Department of Structural Pathology, Institute of Nephrology, Niigata University Graduate School of Medical and Dental Sciences, Niigata, Japan.
| | | | | | | | | | | | | |
Collapse
|
49
|
Yoshida Y, Miyazaki K, Kamiie J, Sato M, Okuizumi S, Kenmochi A, Kamijo K, Nabetani T, Tsugita A, Xu B, Zhang Y, Yaoita E, Osawa T, Yamamoto T. Two-dimensional electrophoretic profiling of normal human kidney glomerulus proteome and construction of an extensible markup language (XML)-based database. Proteomics 2005; 5:1083-96. [PMID: 15668994 DOI: 10.1002/pmic.200401075] [Citation(s) in RCA: 52] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
To contribute to physiology and pathophysiology of the glomerulus of human kidney, we have launched a proteomic study of human glomerulus, and compiled a profile of proteins expressed in the glomerulus of normal human kidney by two-dimensional gel electrophoresis (2-DE) and identification with matrix-assisted laser desorption/ionization-time of flight mass spectrometry (MALDI-TOF MS) and/or liquid chromatography-tandem mass spectrometry (LC-MS/MS). Kidney cortices with normal appearance were obtained from patients under surgical nephrectomy due to renal tumor, and glomeruli were highly purified by a standard sieving method followed by picking-up under a phase-contrast microscope. The glomerular proteins were separated by 2-DE with 24 cm immobilized pH gradient strips in the 3-10 range in the first dimension and 26 x 20 cm sodium dodecyl sulfate polyacrylamide electrophoresis gels of 12.5% in the second dimension. Gels were silver-stained, and valid spots were processed for identification through an integrated robotic system that consisted of a spot picker, an in-gel digester, and a MALDI-TOF MS and / or a LC-MS/MS. From 2-DE gel images of glomeruli of four subjects with no apparent pathologic manifestations, a synthetic gel image of normal glomerular proteins was created. The synthetic gel image contained 1713 valid spots, of which 1559 spots were commonly observed in the respective 2-DE gels. Among the 1559 spots, 347 protein spots, representing 212 proteins, have so far been identified, and used for the construction of an extensible markup language (XML)-based database. The database is deposited on a web site (http://www.sw.nec.co.jp/bio/rd/hgldb/index.html) in a form accessible to researchers to contribute to proteomic studies of human glomerulus in health and disease.
Collapse
Affiliation(s)
- Yutaka Yoshida
- Department of Structural Pathology, Institute of Nephrology, Graduate School of Medical and Dental Sciences, Niigata University, Niigata, Japan.
| | | | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
50
|
Kuroda T, Yoshida Y, Kamiie J, Kovalenko P, Nameta M, Fujinaka H, Yaoita E, Endo T, Ishizuka S, Nakabayashi K, Yamada A, Nagasawa T, Yamamoto T. Expression of MMP-9 in mesangial cells and its changes in anti-GBM glomerulonephritis in WKY rats. Clin Exp Nephrol 2005; 8:206-15. [PMID: 15480897 DOI: 10.1007/s10157-004-0289-8] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2004] [Accepted: 04/09/2004] [Indexed: 10/26/2022]
Abstract
BACKGROUND Matrix metalloproteinase (MMP)-9, a member of the MMP family with specificity towards type IV collagen, is implicated in the turnover of the extracellular matrix in the kidney. To elucidate its physiological and pathophysiological significance, we examined the expression and localization of MMP-9 in the normal kidney and the changes in these features during the course of anti-glomerular basement membrane (GBM) glomerulonephritis induced in WKY rats, along with the changes in these features of tissue inhibitor of metalloproteinase 1 (TIMP-1) and MMP-2. METHODS The expression of MMP-9, TIMP-1 and MMP-2 mRNA was quantified by ribonuclease protection assay, and the gelatinolytic activities of MMP-9 and MMP-2 were evaluated by gelatin zymography. The localization of MMP-9 was visualized by immunohistochemistry and immunofluorescence microscopy. RESULTS The ribonuclease protection assay indicated the almost exclusive expression of MMP-9 mRNA in the glomerulus of normal kidneys. Immunohistochemistry and double-label immunofluorescence microscopy showed that MMP-9 was localized in the mesangial cells. During the course of anti-GBM glomerulonephritis, the expression of MMP-9 mRNA in glomeruli increased on day 1, peaked on days 3 to 7, and then decreased on day 14. The change in MMP-9 mRNA expression was accompanied by parallel changes in the gelatinolytic activity of the active form of MMP-9, TIMP-1 mRNA expression, and MMP-9 immunoreactivity in mesangial cells. In contrast, glomerular MMP-2 mRNA expression and its activity increased after the decline of MMP-9. CONCLUSIONS MMP-9 mRNA was predominantly expressed in the glomerulus in normal rat kidneys and MMP-9 was present in the mesangium. The MMP-9 mRNA expression increased in the glomerulus 3 to 7 days after the induction of anti-GBM glomerulonephritis in WKY rats, in parallel with the development of abnormal glomerular histology and injury, suggesting a role of MMP-9 in proteolysis of the GBM during glomerulonephritis. MMP-2 may participate in the later phase of the nephritis.
Collapse
Affiliation(s)
- Tadahide Kuroda
- Department of Structural Pathology, Institute of Nephrology, Graduate School of Medical and Dental Sciences, Niigata University, Niigata, Japan
| | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|