Publications by authors named "Thitinan Kitisin"

Tryptophol (TOH), a fungal quorum-sensing molecule, that possesses anti-fungal activities for controlling the growth of human pathogenic fungi. In the present study, we developed TOH-containing emulgel formulations and examined the antifungal activities and potential use as topical treatments on the skin. The results showed that TOH-containing emulgel at 1000 μM has excellent physical characteristics as homogenous, stability, and inhibits the growth of 30 species of human pathogenic fungi in vitro.

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Background And Purpose: Subcutaneous infections caused by present as chronic eumycetomatous manifestations in both immunocompromised and immunocompetent individuals. Serious adverse effects/toxicities from the long-term use of antifungal drugs and antifungal resistance have been reported in patients with infections. The present study aimed to determine the anti- activities of fungal quorum sensing molecule known as tryptophol (TOH) and to develop a TOH-containing emulgel for treating eumycetoma.

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Cryptococcosis in the central nervous system (CNS) can present with motor declines described as Parkinsonism. Although several lines of evidence indicate that dopaminergic (DA) neuron degeneration and α-synuclein accumulation contribute to the hallmark of Parkinsonism and Parkinson's disease (PD), little is known about cryptococcal infections associated with neuronal degeneration. In this study, the effects of and infections on dopaminergic neuron degeneration, α-synuclein accumulation, and lifespan in were investigated.

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Background: Cryptococcosis is a life-threatening infection is primarily caused by two sibling species Cryptococcus neoformans and Cryptococcus gattii. Several virulence-related factors of these cryptococci have been widely investigated in Caenorhabditis elegans, representing a facile in vivo model of host-pathogen interaction. While recent studies elucidated cryptococcal virulence factors, intrinsic host factors that affect susceptibility to infections by cryptococci remain unclear and poorly investigated.

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Article Synopsis
  • Candida albicans can lead to infections that vary from mild skin issues to severe illnesses, especially in those with weakened immune systems.
  • The study uses Caenorhabditis elegans to explore how this fungus affects host longevity and immunity, revealing that C. albicans reduces the lifespan of the worm by impairing insulin signaling pathways.
  • Additionally, the research highlights how C. albicans enhances its virulence through the repression of key transcription factors, linking infection to both aging processes and immune responses.
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Exfoliative erythroderma is rare but serious condition, which requires close supervision. We report a rare case of 28-year-old man with kissing lesions of Paederus dermatitis at his right side of neck. The rash caused by beetle was improved after treatments.

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Soil fungal communities play an important role in regulating biogeochemical transformations, yet soil-related fungal pathogens are emerging threats to humans. Our previous studies have revealed the pathogenic Scedosporium species in soils samples from public parks with high human activities in Thailand. However, measurement and survey of soil fungal communities in other areas with high human/animal activities, such as the pigsty, are poorly determined.

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Candida albicans is an opportunistic fungal infectious agent that can cause cutaneous candidiasis in humans. Biofilms formation of C. albicans is thought to be the major cause of antifungal drug resistance.

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Article Synopsis
  • Central venous catheters (CVCs) are prone to severe complications from fungal colonization, specifically by an opportunistic pathogen, but a quorum-sensing molecule called tryptophol (TOH) has shown potential in controlling this issue.
  • In experiments, TOH demonstrated a dose-dependent ability to inhibit pathogen growth and significantly reduced biofilm formation and fungal cell viability on catheter surfaces.
  • Coating catheters with TOH not only mitigated cerebral and lung damage associated with infections but also enhanced survival rates in experimental models, suggesting it as a viable strategy for preventing catheter-related infections.
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Saponins are secondary metabolite compounds that can be found in sea cucumbers (Holothuroidea spp.). However, little is known about how saponin-rich extracts from Holothuria leucospilota can delay and prolong the lifespan of the whole organism.

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Article Synopsis
  • The study focuses on establishing a human neuroblastoma cell line (SH-SY5Y) as a model to investigate Zika virus (ZIKV) infections in adult neurons, addressing the lack of effective models for this purpose.
  • The researchers found that ZIKV efficiently infects SH-SY5Y cells, causing significant changes in cell viability, morphology, and cytotoxicity, which were different from those observed in non-human primate Vero cells.
  • The findings suggest that ZIKV particles not only replicate in the cytoplasm but are also present in the nucleoplasm, indicating potential implications for understanding neuropathological effects in adult humans infected with ZIKV.
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Skin infection from pathogenic dermatophyte, Epidermophytonfloccosum, can cause serious health complications, especially in immuno-compromised patients. Proteolytic enzymes secreted from E. floccosum are required for host tissue degradation, facilitating fungal invasion.

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Growing rates of fungal infections and increasing resistance against standard antifungal drugs can cause serious health problems. There is, therefore, increasing interest in the potential use of medicinal plants as novel antifungal agents. This study investigates the antifungal properties of crude plant extracts from ten medicinal plant species.

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