The Diagnostic Predictive Value of Aspartate Aminotransferase/Platelet Ratio Index (APRI) in Assessing the Disease Severity of Filipino Dengue Patients in Pampanga, Philippines: A Multicenter Study

Introduction/Objective

Lack of good predictive biomarkers tied with its widely varying clinical manifestation make DENV infection a major public health concern especially in developing countries like the Philippines. Liver involvement is found to be a common manifestation among severe dengue patients hence enzymes such as aspartate aminotransferase (AST) is used in determining dengue severity. This study aims to evaluate the predictive value of AST/platelet ratio index (APRI) in assessing disease severity among Filipino dengue patients upon admission.

Methods/Case Report

Clinical data of 16 dengue patients from two hospitals in Pampanga were analyzed retrospectively. Results for NS1 antigen test, CBC, and AST along with signs and symptoms of patients upon admission were reviewed. ANCOVA was used to compare AST and APRI between the groups while ROC regression and Youden’s index were utilized in identifying severe dengue using AST and APRI.

Results (if a Case Study enter NA)

Among the 16 patients, 10 were male and 6 were females with a mean age of 17.9 years (range, 6 to 34). There was no evidence that AST (p=0.223) significantly differed between severe and non- severe dengue, with a mean of 131.0±24.5 and 78.5±24.5, respectively. Calculated APRI scores (p=0.604) did not show significant difference between SD and NSD, with a mean of 3.8± 4.1 and 3.7±4.1, respectively. The obtained AST cutoff for SD was 119 U/L; while the APRI cutoff for SD is 4.03. However, considering the age of patients as covariate, both AST [AUC = 0.55 (95% CI: 0.15 to 0.86)] and APRI [AUC = 0.69 (95% CI: 0.27 to 1.00)] was not able to differentiate patients with SD and NSD.

Conclusion

The parameters AST and APRI were not able to differentiate and predict severity between SD and NSD. A larger cohort with a more specific age group, and collection of samples throughout the course of illness are needed to further substantiate the results.

Placental neurokinin B mRNA expression increases at preterm labor

INTRODUCTION

Neurokinin B (NKB) is a neuropeptide belonging to the family of tachykinins-related peptides that elicits contractility of human myometrial strips in vitro. The present study evaluates whether placental mRNA and peptide expression of NKB change in women at preterm labor.

METHODS

A group of 26 women with singleton pregnancies were enrolled in the study. Placental tissue specimens were collected from pregnant women delivering after elective cesarean section, after labor at term, or after preterm labor. Changes in placental NKB mRNA and protein expression were evaluated by real-time quantitative RT-PCR analysis and by immunofluorescence respectively.

RESULTS

Placental mRNA expression of NKB was significantly higher after term and preterm labor (P<0.001) than cesarean section, and highest after preterm labor. Immunofluorescent staining in placentas from preterm or term labor was more intense than after cesarean section (P<0.001). In particular, NKB protein expression was higher in placentas collected after preterm labor than those collected after term labor.

DISCUSSION

Neurokinin B mRNA and protein are highly expressed in placenta at term and preterm labor; thus, the involvement of this neuropeptide in the events cascade leading to parturition may be suggested.

[Larvae of Anopheles (sub-genus Kerteszia) Theobald 1905 found in artificial breeding pens, in the State of Paraná, Brazil]

Discute-se encontro de larvas de duas espécies de anofelinos do subgênero Kerteszia - An. (Ker.) cruzii e An. (Ker.) bambusicolus - em criadouros artificiais, no Estado do Paraná, Brasil.