I Made Diraswantara, Wiwik Susanah Rita

The Extraction and Phytochemical Test of Toxic Extract of Xestospongia testudinaria Sponge

Introduction

The extraction and phytochemical test of toxic extract of xestospongia testudinaria sponge. Toxic extract of Xestospongia testudinaria sponge investigated. Details methanol extraction, BSLT toxicity (LC50 31.62 ppm), and phytochemicals: alkaloids, steroids, polyphenols, saponins.

Abstract

This research aims toextraction and phytochemical test of the toxic extract of the Xestospongia testudinaria sponge collected from Sanur beach, Bali, Indonesia. Extraction of the sponges was carried out by methanol at room temperature. Toxicity screening test was done based on Bhrine Shrimp Lethality Test (BSLT). The compounds of the toxic extract were performed by phytochemical test. Based on the results, it was found that the methanol extract of X. testudinaria sponges has toxic activity with LC50 of 31.62 ppm. The toxic extract contained alkaloid, steroid, polyphenol, and saponin compounds.

Review

This paper presents a focused study on the *Xestospongia testudinaria* sponge, specifically targeting the extraction and preliminary phytochemical characterization of its toxic components. The research addresses a relevant area within marine natural product chemistry, given the well-established potential of marine organisms, particularly sponges, as sources of novel bioactive compounds. The authors successfully demonstrate the toxicity of the methanol extract using the Brine Shrimp Lethality Test (BSLT) and provide an initial profile of the major phytochemical classes present, laying foundational work for further investigation into the species' chemical ecology and pharmacological potential. Methodologically, the study employs standard techniques for extraction and initial toxicity screening. The use of methanol at room temperature is a common and appropriate approach for broad-spectrum extraction of polar and semi-polar compounds. The determination of an LC50 value of 31.62 ppm provides a quantitative measure of the extract's toxicity, which is a key result. Furthermore, the identification of compound classes such as alkaloids, steroids, polyphenols, and saponins via phytochemical tests offers valuable preliminary insights into the chemical landscape of *X. testudinaria*, indicating the presence of diverse secondary metabolites known for their biological activities. The findings presented in this abstract are significant as a preliminary step in exploring the bioactivity of *X. testudinaria*. The demonstrated toxicity and the presence of diverse phytochemicals strongly suggest that this sponge is a rich source of potentially bioactive molecules. This work serves as an excellent starting point for subsequent research, which should ideally focus on the isolation and structural elucidation of the specific compounds responsible for the observed toxicity. Further studies could then explore the specific biological activities of these isolated compounds in more targeted assays, thereby contributing to the discovery of new therapeutic agents or providing deeper understanding of the ecological role of these compounds in the marine environment.

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