Suppression of Allergic Diarrhea in Murine Ovalbumin-Induced Allergic Diarrhea Model by PG102, a Water-Soluble Extract Prepared from Actinidia arguta

2009 ◽  
Vol 150 (2) ◽  
pp. 164-171 ◽  
Author(s):  
Donghyun Kim ◽  
Seon Hee Kim ◽  
Eun-Jin Park ◽  
Jiyoung Kim ◽  
Sang-Heon Cho ◽  
...  
Nutrients ◽  
2018 ◽  
Vol 10 (10) ◽  
pp. 1399 ◽  
Author(s):  
Hyun-keun Kim ◽  
Min Bae ◽  
Seonung Lim ◽  
Wonwoo Lee ◽  
Sunyoung Kim

Psoriasis is a chronic inflammatory disease with complex etiology involving multiple factors. Current treatment methods are highly limited and there is a strong need for the development of safer and efficacious agents. We have previously shown that a water-soluble extract derived from hardy kiwifruit Actinidia arguta, called PG102, shows potent anti-inflammatory effects. Based on its reported biological activities, the effects of PG102 were examined on imiquimod-induced psoriasis-like skin inflammation. Our results showed that topical application of PG102 ameliorates clinical symptoms of psoriasis, reducing skin thickness and Interleukin (IL)-17A level in draining lymph nodes without causing any adverse effects. Treatment with PG102 on cytokine-stimulated HaCaT cells suppressed hyperproliferation and downregulated the expression of various chemokines and antimicrobial peptides known to induce neutrophil infiltration. These anti-inflammatory activities of PG102 were mediated via inhibition of NF-κB and signal transducer of activation (STAT) signaling. We also found decreased neutrophil chemotaxis both in vitro and in vivo. Taken together, PG102 has potential as a safe and effective reagent for the treatment of psoriasis.


2019 ◽  
Vol 2019 ◽  
pp. 1-9 ◽  
Author(s):  
Hyun-keun Kim ◽  
Seonung Lim ◽  
Min-Jung Bae ◽  
Wonwoo Lee ◽  
Sunyoung Kim

IL-37 is an immunomodulatory cytokine that suppresses inflammation in various cell types and disease models. However, its role in keratinocytes has not been clearly understood, and there has been no report on the agents that can increase the expression of IL-37 in keratinocytes. In this study, we investigated the effects of silencing IL37 in HaCaT keratinocytes and the molecular mechanisms involved in the upregulation of IL-37 by PG102, a water-soluble extract from Actinidia arguta. It was found that knockdown of IL37 resulted in the augmented expression of antimicrobial peptides (AMPs) in response to cytokine stimulation. PG102 increased the expression of IL-37 at both mRNA and protein levels presumably by enhancing the phosphorylation of Smad3, ERK, and p38. Indeed, when cells were treated with specific inhibitors for these signaling molecules, the expression level of IL-37 was reduced. PG102 also promoted colocalization of phospho-Smad3 and IL-37. Our results suggest that IL-37 inhibits the expression of AMPs and that PG102 upregulates IL-37 through p38, ERK, and Smad3 pathways in HaCaT cells.


2021 ◽  
Vol 86 (2) ◽  
pp. 523-530
Author(s):  
Jiuliane Martins da Silva ◽  
Carlos Eduardo Barão ◽  
Erick Almeida Esmerino ◽  
Adriano Gomes Cruz ◽  
Tatiana Colombo Pimentel

2003 ◽  
Vol 228 (6) ◽  
pp. 749-758 ◽  
Author(s):  
Mirim Jin ◽  
Hyung Jin Jung ◽  
Jeong June Choi ◽  
Hyang Jeon ◽  
Jin Hwan Oh ◽  
...  

We isolated a water-soluble extract, PG101, from cultured mycelia of Lentinus lepideus. Treatment of human peripheral blood mononuclear cells (PBMCs) with PG101 increased levels of TNF-α, IL-1β, IL-10, and IL-12 by 100- to 1000-fold, whereas GM-CSF and IL-18 were activated by an order of magnitude. On the contrary, IFN-γ and IL-4 were not affected. The response to PG101 occurred in a dose- and time-dependent manner. From the human PBMCs treated with PG101, TNF-α was a first cytokine to be activated, detectable at 2 hr post-treatment followed by IL-1β at 6 hr post-treatment. IL-12 and IL-10 were the next to follow. GM-CSF and IL-18 both showed significant increases 24 hr after treatment. When PBMCs were sorted into various cell types, monocyte/macrophages, but not T and B cells, were the major target cell type responsive to PG101. Consistent with this result, the profile of cytokine expression upon PG101 treatment was comparable between PBMCs and a human promonocytic cell line (U937), whereas cell lines of T cell and myeloid origins did not respond to PG101. Data from a transient transfection assay involving specific reporter plasmids indicated that cellular transcription factor such as NF-κB, but not AP-1, was highly activated by PG101. Results from a gel retardation assay and the experiment involving a specific NF-κB inhibitor confirmed the involvement of NF-κB. Despite its significant biological effect on various cytokines, PG101 remained nontoxic in both rats and PBMCs even at a biological concentration approximately 20 times greater. PG101 demonstrates great potential as a therapeutic immune modulator.


Author(s):  
Agdylannah Felix Vieira ◽  
Ana Paula Trindade Rocha ◽  
Dyego Da Costa Santos ◽  
Hanna Mayara Brito Rodrigues Morais ◽  
Renata Duarte Almeida ◽  
...  

<p>Considering the need for new products to meet the portion of the population with lactase enzyme deficiency, the study processed and characterized the physical, physical-chemical and sensory parameters of a dulce de leche made with soy-based extract. The research was developed at the Food Engineering Laboratory of the Federal University of Campina Grande. The soybean milk used in the preparation of the product was the UHT type and pasteurized cow’s milk, both purchased commercially from the city of Campina Grande, PB. Three sweet formulations were prepared: the first one containing 100% whole bovine milk; the second one with 100% water-soluble soy extract and the last one with 50% water-soluble soy extract and 50% whole milk. There were significant differences in all physicochemical analyses, except for the ash one. Regarding the addition of the soybean water-soluble extract in the dulce de leche, this procedure altered the traditional flavor, resulting in less acceptance of the product and 90% of the judges declared that they would not buy that. Through the instrumental analyses, it was verified that the addition of water-soluble soybean extract changed statistically (p &lt;0.05) the characteristics of color and texture</p>


Sign in / Sign up

Export Citation Format

Share Document