RT Journal Article T1 Significance of the Overexpression of Substance P and Its Receptor NK-1R in Head and Neck Carcinogenesis: A Systematic Review and Meta-Analysis A1 González-Moles, Miguel Ángel A1 Ramos-García, Pablo A1 Esteban, Francisco K1 Substance P K1 NK-1R K1 Neurokinin K1 Tachykinin K1 Head and neck K1 Neoplasm K1 Squamous cell carcinoma K1 Systematic review K1 Meta-analysis K1 Receptores de neuroquinina-1 K1 Taquicininas K1 Cabeza K1 Cuello K1 Neoplasias K1 Carcinoma de células escamosas K1 Revisión sistemática K1 Metaanálisis K1 Neoplasias de cabeza y cuello AB The objective of our study has been, through a systematic review and meta-analysis, to increase the scientific evidence on the implications of SP and its receptor NK-1R in head and neck carcinogenesis. We searched studies published before May-2020 without date and publication language restrictions (PubMed, Embase, Web of Science, Scopus). We evaluated the quality of the studies included (QUIPS tool). We performed heterogeneity, sensitivity, small-study effects, and subgroup analyses. A total 16 studies and 1308 cases met inclusion criteria. Qualitative evaluation demonstrated that not all studies were performed with the same scientific rigor, finding the greatest risk of bias in the study confounding and prognostic factors measurement domains. Quantitative evaluation showed a greater SP/NK-1R overexpression in malignant head and neck lesions compared to benign lesions (p = 0.02), and that expression was observed in malignant salivary gland pathology. Likewise, we found a higher overexpression of NK-1R compared to SP (p = 0.02). In conclusion, the results of this systematic review and meta-analysis show evidence that the upregulation of SP and NK-1R are oncogenic events involved in head and neck carcinogenesis, probably acting in the early stages of malignization. In addition, there is evidence of a greater relevance of the upregulation of the NK-1R receptor compared to SP, which highlights the interest in deepening the development of targeted therapies on the receptor. Future studies assessing the relationships between SP/NK-1R among subjects with head and neck tumors could consider the recommendations given in this systematic review and meta-analysis to improve and standardize future research. PB MDPI YR 2021 FD 2021-03-17 LK http://hdl.handle.net/10668/4183 UL http://hdl.handle.net/10668/4183 LA en NO González-Moles MÁ, Ramos-García P, Esteban F. Significance of the Overexpression of Substance P and Its Receptor NK-1R in Head and Neck Carcinogenesis: A Systematic Review and Meta-Analysis. Cancers. 2021 Mar 17;13(6):1349 DS RISalud RD Apr 10, 2025