Identification of Inflammatory Mediators in Saliva Samples From Hospitalized Newborns: Potential Biomarkers?

Saliva measurements serve as a noninvasive tool for clinically monitoring newborns (NB) and children, a vulnerable population with promising potential for both research and clinical practice. Saliva acts as a repository for various inflammatory biomarkers involved in diverse biological functions. Particularly for children, it offers numerous advantages when compared to plasma and urine sampling. Nevertheless, there is a significant knowledge gap regarding detectable levels of cytokines in the saliva of newborns and children, as well as studies aiming to assess the relationship of this content with physiological and pathological processes.

OBJECTIVES

To characterize the levels of 11 inflammatory mediators (IFNg, IL1b, IL2, IL4, IL6, IL8, IL10, IL12, IL17, TNF, and VEGF) in saliva samples from NB on the first and second day of hospitalization in the Neonatal Intensive Care Unit (NICU).

METHOD

Exploratory study, descriptive, nested within a primary clinical, observational, and prospective study, conducted in the NICU of a public hospital in São Paulo, Brazil. Demographic data and vital signs were recorded in the clinical records of 90 NB, and five saliva samples from 5 NB were collected between the first and second day of life (D1-D2) at approximately 8-hr intervals (8-9 am, 4-5 pm, and 11-12 pm). Saliva samples were used for the measurement of 11 cytokines (IFNg, IL1b, IL2, IL4, IL6, IL8, IL10, IL12, IL17, TNF, and VEGF).

RESULTS

Five NBs participated in this exploratory study, and the vital signs showed variability from the first (D1) to the second day (D2) of hospitalization, variability similar to that of the total population of the primary study. The presence and levels of the 11 cytokines were detected in the saliva samples, as well as a statistical correlation between 10 cytokines (IFNg, IL1b, IL2, IL4, IL6, IL10, IL12, IL17, TNF, and VEGF) and vital signs.

CONCLUSIONS

The novelty of measuring inflammatory mediators in saliva samples from hospitalized NBs in the NICU is highlighted, providing support and new perspectives for the development of clinical and experimental research and an opportunity for developing and implementing new salivary biomarkers in different population segments.

Practice of immersion in hot water to relieve pain in neonatology: an integrative review

OBJECTIVES

to identify immersion use in hot water to relieve pain in newborns.

METHODS

an integrative literature review, carried out in the PubMed, VHL, EMBASE, Scopus, CINAHL, Cochrane and SciELO databases, with investigations in English, Spanish, French or Portuguese, published between 2002 and 2022. The Health Sciences Descriptors (DeCS) and Medical Subject Headings (MeSH) were used to answer the following question: what are the uses of hot water immersion in relieving pain in newborns?

RESULTS

nine studies were included, mainly Brazilian, experimental, with a predominance of strong and moderate levels of evidence. Hydrotherapy and bath use (immersion and bandaging) was observed, promising interventions in reducing pain scores, assessed using scales, physiological and endocrine parameters.

CONCLUSIONS

hot water proved to be a promising non-pharmacological intervention in relieving pain in infants in different contexts.

Painful procedures and pain management in newborns admitted to an intensive care unit

OBJECTIVE

To characterize painful procedures, analgesic strategies, vital signs, and pain scores in hospitalized newborns.

METHOD

This is a primary, observational, prospective clinical study, developed in a Brazilian public hospital. Demographic data, painful procedures, pain relief measures, vital signs, and pain scores were collected from the clinical records of 90 newborns admitted to the intensive care unit and evaluated between admission and the third day of admission. For statistical analysis, the software Statistic Package for the Social Sciences and the R Software were used.

RESULTS

Newborns underwent 2,732 painful procedures, 540 non-pharmacological and 216 pharmacological strategies. The most frequently performed procedure was the heel prick (20.96%). The most commonly recorded non-pharmacological strategy was dim lighting (28.33%) and continuous fentanyl (48.83%) was the main pharmacological measure adopted. Pain score and vital signs show variability in the period evaluated.

CONCLUSION

Despite the high number of painful procedures, pain assessment records do not reflect procedural pain and the use of analgesic strategies was insufficient.