PMID- 34502182 OWN - NLM STAT- MEDLINE DCOM- 20211029 LR - 20211029 IS - 1422-0067 (Electronic) IS - 1422-0067 (Linking) VI - 22 IP - 17 DP - 2021 Aug 27 TI - Identification of Activated Protein Kinase Calpha (PKCalpha) in the Urine of Orthotopic Bladder Cancer Xenograft Model as a Potential Biomarker for the Diagnosis of Bladder Cancer. LID - 10.3390/ijms22179276 [doi] LID - 9276 AB - Bladder cancer has a high recurrence rate; therefore, frequent and effective monitoring is essential for disease management. Cystoscopy is considered the gold standard for the diagnosis and continuous monitoring of bladder cancer. However, cystoscopy is invasive and relatively expensive. Thus, there is a need for non-invasive, relatively inexpensive urinary biomarker-based diagnoses of bladder cancer. This study aimed to investigate the presence of activated protein kinase Calpha (PKCalpha) in urine samples and the possibility of PKCalpha as a urinary biomarker for bladder cancer diagnosis. Activated PKCalpha was found to be present at higher levels in bladder cancer tissues than in normal bladder tissues. Furthermore, high levels of activated PKCalpha were observed in urine samples collected from orthotopic xenograft mice carrying human bladder cancer cells compared to urine samples from normal mice. These results suggest that activated PKCalpha can be used as a urinary biomarker to diagnose bladder cancer. To the best of our knowledge, this is the first report describing the presence of activated PKCalpha in the urine of orthotopic xenograft mice. FAU - Kawano, Takahito AU - Kawano T AD - Center for Advanced Medical Innovation, Kyushu University, 3-1-1 Maidashi, Higashi-ku, Fukuoka 812-8582, Japan. FAU - Tachibana, Yoko AU - Tachibana Y AD - Center for Advanced Medical Innovation, Kyushu University, 3-1-1 Maidashi, Higashi-ku, Fukuoka 812-8582, Japan. FAU - Inokuchi, Junichi AU - Inokuchi J AUID- ORCID: 0000-0002-6791-905X AD - Department of Urology, Graduate School of Medical Sciences, Kyushu University, 3-1-1 Maidashi, Higashi-ku, Fukuoka 812-8582, Japan. FAU - Kang, Jeong-Hun AU - Kang JH AUID- ORCID: 0000-0001-9229-3063 AD - Division of Biopharmaceutics and Pharmacokinetics, National Cerebral and Cardiovascular Center Research Institute, 6-1 Shinmachi, Kishibe, Suita, Osaka 564-8565, Japan. FAU - Murata, Masaharu AU - Murata M AD - Center for Advanced Medical Innovation, Kyushu University, 3-1-1 Maidashi, Higashi-ku, Fukuoka 812-8582, Japan. FAU - Eto, Masatoshi AU - Eto M AUID- ORCID: 0000-0002-3312-9930 AD - Center for Advanced Medical Innovation, Kyushu University, 3-1-1 Maidashi, Higashi-ku, Fukuoka 812-8582, Japan. AD - Department of Urology, Graduate School of Medical Sciences, Kyushu University, 3-1-1 Maidashi, Higashi-ku, Fukuoka 812-8582, Japan. LA - eng GR - 19K09692/Japan Society for the Promotion of Science/ GR - 19H04488/Japan Society for the Promotion of Science/ GR - 21K12685/Japan Society for the Promotion of Science/ GR - JP20hm0102067/Japan Agency for Medical Research and Development/ PT - Journal Article DEP - 20210827 PL - Switzerland TA - Int J Mol Sci JT - International journal of molecular sciences JID - 101092791 RN - 0 (Biomarkers, Tumor) RN - EC 2.7.11.13 (Protein Kinase C-alpha) SB - IM MH - Animals MH - Biomarkers, Tumor/urine MH - Cell Line, Tumor MH - Early Detection of Cancer MH - Female MH - Humans MH - Mice MH - Mice, Nude MH - Protein Kinase C-alpha/isolation & purification/*urine MH - Urinary Bladder Neoplasms/diagnosis/*metabolism/urine MH - Xenograft Model Antitumor Assays PMC - PMC8430461 OTO - NOTNLM OT - bladder cancer OT - cystoscopy OT - orthotopic xenograft mice OT - protein kinase Calpha OT - urinary biomarker COIS- The authors declare no conflict of interest. EDAT- 2021/09/11 06:00 MHDA- 2021/10/30 06:00 PMCR- 2021/08/27 CRDT- 2021/09/10 01:07 PHST- 2021/07/26 00:00 [received] PHST- 2021/08/26 00:00 [revised] PHST- 2021/08/26 00:00 [accepted] PHST- 2021/09/10 01:07 [entrez] PHST- 2021/09/11 06:00 [pubmed] PHST- 2021/10/30 06:00 [medline] PHST- 2021/08/27 00:00 [pmc-release] AID - ijms22179276 [pii] AID - ijms-22-09276 [pii] AID - 10.3390/ijms22179276 [doi] PST - epublish SO - Int J Mol Sci. 2021 Aug 27;22(17):9276. doi: 10.3390/ijms22179276.