PMID- 36889765 OWN - NLM STAT- MEDLINE DCOM- 20230310 LR - 20230310 IS - 1550-8080 (Electronic) IS - 0091-7370 (Linking) VI - 53 IP - 1 DP - 2023 Jan TI - Review: Mammalian Target of Rapamycin (mTOR) Pathway Is Critical in Developing Most Renal Cell Tumors. PG - 3-13 AB - OBJECTIVE: Various renal cell carcinomas (RCC) are derived from different segments of the renal tubular origin, which determines their morphological and immunohistochemical phenotype and their molecular signaling pathway as a therapeutic target. Most of these tumors utilize the mammalian target of rapamycin (mTOR) pathway to activate pathways involving metabolic and nutritional supplies. METHODS: Overexpressed mTOR signals are reported in more than 90% of the most common types of RCC. Many new renal tumor entities have been reported in recent years. RESULTS: Among them, somatic mutations in tuberous sclerosis complex (TSC) result in loss of its normal inhibitory control over mTOR, thus promoting mTOR-associated proliferative activities in several new renal neoplastic entities including RCC with fibromyomatous stroma (RCCFMS), eosinophilic vacuolated tumor, eosinophilic solid & cystic RCC, and low-grade oncocytic tumor. CONCLUSIONS: This short review provides a comprehensive correlation of tumor morphology and immunohistochemical phenotype with renal tubular differentiation and their shared mTOR. These essential pieces of knowledge are vital in the diagnosis and clinical management of renal cell neoplasms. CI - (c) 2023 by the Association of Clinical Scientists, Inc. FAU - Zhang, Kevin J AU - Zhang KJ AD - Division of Hematology and Oncology, Beth Israel Deaconess Medical Center, Boston, MA, USA Ping.Zhang@beaumont.edu. FAU - Qu, Zhenhong AU - Qu Z AD - Division of Pathology, Beaumont Health, Royal Oak, MI, USA. FAU - Pszenica, Elan AU - Pszenica E AD - William Beaumont School of Medicine, Oakland University, Rochester, MI, USA. FAU - Hafron, Jason M AU - Hafron JM AD - Department of Urology, Beaumont Health, Royal Oak, MI, USA. FAU - Zhang, Ping L AU - Zhang PL AD - Division of Pathology, Beaumont Health, Royal Oak, MI, USA. FAU - Brown, Robert E AU - Brown RE AD - Department of Pathology, University of Texas Health Science Center at Houston-UTHealth Medical School, Houston, TX, USA Robert.Brown@uth.tmc.edu. LA - eng PT - Journal Article PL - United States TA - Ann Clin Lab Sci JT - Annals of clinical and laboratory science JID - 0410247 RN - 0 (Tuberous Sclerosis Complex 2 Protein) RN - EC 2.7.11.1 (TOR Serine-Threonine Kinases) RN - EC 2.7.1.1 (MTOR protein, human) SB - IM MH - Humans MH - *Carcinoma, Renal Cell/genetics/pathology MH - Tuberous Sclerosis Complex 2 Protein/genetics MH - Mutation MH - *Kidney Neoplasms/pathology MH - TOR Serine-Threonine Kinases/metabolism OTO - NOTNLM OT - mTOR OT - mutations OT - renal cell neoplasm OT - treatment resistance OT - tuberous sclerosis complex EDAT- 2023/03/09 06:00 MHDA- 2023/03/11 06:00 CRDT- 2023/03/08 20:33 PHST- 2023/03/08 20:33 [entrez] PHST- 2023/03/09 06:00 [pubmed] PHST- 2023/03/11 06:00 [medline] AID - 53/1/3 [pii] PST - ppublish SO - Ann Clin Lab Sci. 2023 Jan;53(1):3-13.