Could venom-derived therapeutics resolve treatment resistance in refractory EAC?

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  Could venom-derived therapeutics resolve treatment resistance in refractory EAC? Abstract The incidence of esophageal adenocarcinoma is rising in Western countries. Despite advances in chemotherapy and immunotherapy, the prognosis remains poor, with an overall 5-year survival rate below 15%. A major challenge is the cancer’s poor and often unpredictable response to current treatments. Animal venoms represent a promising yet underexplored source of therapeutic agents, offering millions of structurally diverse and highly potent bioactive peptides that can modulate a wide array of molecular targets. However, only a small fraction of these peptides has been pharmacologically characterized. This review presents the therapeutic potential of venom-derived peptides in cancer treatment, summarizes the role of ion channels in esophageal adenocarcinoma (EAC), and discusses peptides targeting ion channels that may offer new opportunities for future EAC treatment. Freuville L, Matthys C, Gill...

Scorpion (Hottentotta tamulus) venom pre-exposure delays functional recovery in mice following peripheral nerve injury

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Scorpion (Hottentotta tamulus) venom pre-exposure delays functional recovery in mice following peripheral nerve injury

Abstract

Scorpion sting leads to profound challenges of central nervous system (CNS) impairments such as neuro-inflammation, unconsciousness, aberrant ion channels physiology, epilepsy and may become fatal due to heart failure. However persistence of Hottentotta tamulus venom in peripheral nerves and subsequent influence on regenerative process of injured peripheral nerve remains unknown. Current study reports the persistence of H. tamulus venom components 30-days following its intraperitoneal administration in sciatic nerves (SN) of mice pre-exposed through either a single-toxin exposure (STE) or multiple-toxin exposure (MTE). Of note, venom pre-exposure delays and compromises the sensori-motor functional recovery in STE and MTE mice following standard sciatic nerve crush injury. Histological investigations of regenerating SN and gastrocnemius muscles (GCM) 14-days post crush injury exhibited reduced myelination and limited numbers of motor axons in SNs and GCM of MTE mice, respectively. Consistently, a marked reduction in expression of regeneration-promoting markers including transcription factors (such as Atf-3 and c-Jun), regeneration associated genes (such as Sprr1a and Gap-43) and ion channel proteins encoding genes (such as Scn9a and Kcc2) was observed in lumber dorsal root ganglia (DRG) and regenerating SN 14-days post crush injury. Collectively, this study reports the persistence and regeneration-inhibiting effects of H. tamulus venom in peripheral nerve of pre-exposed mice leading to compromised functional recovery.

Article Source: Scorpion (Hottentotta tamulus) venom pre-exposure delays functional recovery in mice following peripheral nerve injury Khan A, Raza C, Zahid MT, Rehman HFu, Sharif S, et al. (2025) Scorpion (Hottentotta tamulus) venom pre-exposure delays functional recovery in mice following peripheral nerve injury. PLOS ONE 20(8): e0330600. https://doi.org/10.1371/journal.pone.0330600