AIF-1 and RNASET2 Play Complementary Roles in the Innate Immune Response of Medicinal Leech
Basic science / preclinical published in Journal of innate immunity (2019)
Abstract
Recent studies demonstrated that allograft inflammatory factor-1 (AIF-1) and RNASET2 act as chemoattractants for macrophages and modulate the inflammatory processes in both vertebrates and invertebrates. The expression of these proteins significantly increases after bacterial infection; however, the mechanisms by which they regulate the innate immune response are still poorly defined. Here, we evaluate the effect of bacterial lipopolysaccharide injection on the expression pattern of these genes and the interrelation between them during innate immune response in the medicinal leech, an invertebrate model with a simple anatomy and a marked similarity with vertebrates in inflammatory processes. Collectively, prokaryotic-eukaryotic co-cultures and in vivo infection assays suggest that RNASET2 and AIF-1 play a crucial role in orchestrating a functional cross-talk between granulocytes and macrophages in leeches, resulting in the activation of an effective response against pathogen infection. RNASET2, firstly released by granulocytes, likely plays an early antibacterial role. Subsequently, AIF-1+ RNASET2-recruited macrophages further recruit other macrophages to potentiate the antibacterial inflammatory response. These experimental data are in keeping with the notion of RNA-SET2 acting as an alarmin-like molecule whose role is to locally transmit a "danger" signal (such as a bacterial infection) to the innate immune system in order to trigger an appropriate host response.
Abstract sourced from PubMed (NCBI) for the cited record. See the original publication for the authoritative version.
Resumen
Recent studies demonstrated that allograft inflammatory factor-1 (AIF-1) and RNASET2 act as chemoattractants for macrophages and modulate the inflammatory processes in both vertebrates and invertebrates.
Por qué esto importa para la hirudoterapia
Utilizando la sanguijuela medicinal como modelo inmunológico invertebrado, este estudio examinó cómo las proteínas quimioatrayentes AIF-1 y RNASET2 responden al lipopolisacárido bacteriano, y se encontró, a través de cocultivos procariotas-eucariotas y ensayos de infección in vivo, que RNASET2 es liberada tempranamente por los granulocitos como una señal antibacteriana de tipo alarmina y que posteriormente se reclutan macrófagos positivos para AIF-1 para amplificar la respuesta inflamatoria. Para ASH, esto respalda la narrativa científica más amplia de que Hirudo medicinalis es un modelo tratable cuyos procesos inflamatorios muestran una notable similitud con los de los vertebrados, lo que ayuda a explicar la bien caracterizada biología inmunológica innata y de moléculas bioactivas de la sanguijuela. La salvedad es que se trata de un trabajo básico sobre mecanismos preclínicos en la propia sanguijuela, no de un estudio sobre ningún efecto terapéutico humano, y no formula ninguna afirmación clínica.
Citación
AIF-1 and RNASET2 Play Complementary Roles in the Innate Immune Response of Medicinal Leech.
Baranzini N et al. · Journal of innate immunity, 2019
Contexto clínico relacionado
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Añadido a la biblioteca ASH: March 18, 2026 · Última actualización del sitio: June 18, 2026