Phuong Thi Nguyen

Ms. Phuong Thi Nguyen


Research Focus & Metrics

Academic Career Length

7Years (2020-Present)

(Calculated once Scilit publication data is synced: current year − year of first publication + 1)

Representative Publications

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14 February 2023 in Heliyon
Verified
Journal Article
Open access
PNPhuong Thi Nguyen
Phuong Thi Nguyen
HPHan N. Phan
Han N. Phan
TDThang Duc Do
Thang Duc Do
GDGiap Dang Do
Giap Dang Do
LNLong Hoang Ngo
Long Hoang Ngo
KNKhoa Thi Nguyen
Khoa Thi Nguyen
Polysaccharide and alcohol extracts of Anoectochilus formosanus Hayata have attracted great attention as they exhibit noteworthy properties such as prebiotic and anti-hyperglycemic effects. However, the antioxidant and wound-healing activities of the polysaccharide extract as well as the antibacterial and cytotoxic effects of the ethanol extracts have not been thoroughly uncovered. Therefore, our study investigated these bioactivities of the two extracts prepared from Anoectochilus formosanus to broaden understandings of medical benefits of the plant. The monosaccharide composition was analyzed by HPAEC-PAD. The antioxidant and wound-healing activities of the polysaccharide extract were evaluated by ABTS and scratch assays, respectively. The broth dilution method was used to determine the antibacterial ability of the ethanol extract. Additionally, the cytotoxic and mechanistic effects of this extract against hepatocellular carcinoma HUH-7 cells was assessed by MTT assay, qRT-PCR and Western blotting methods. The polysaccharide extract possessed an effective free radical scavenging ability in an ABTS assay (IC50 = 44.92 μg/ml). The extract also ameliorated wound recovery in a fibroblast scratch assay. Meanwhile, the ethanol extract was able to inhibit the growth of Staphylococcus aureus (MIC = 2500 μg/ml), Bacillus cereus (MIC = 2500 μg/ml), Escherichia coli (MIC = 2500 μg/ml), and Pseudomonas aeruginosa (MIC = 1250 μg/ml). Additionally, it repressed the viability of HUH-7 cells (IC50 = 53.44 μg/ml), possibly through upregulating the expression of caspase 3 (CASP3), CASP8, and CASP9 at both mRNA and protein levels. The polysaccharide extract of A. formosanus exhibited the antioxidant and wound-healing properties whereas the ethanol extract showed the antibacterial activity and cytotoxicity against HUH-7 cells. These findings specify notable biological effects of the two extracts which could be of potential use in human healthcare.

1 April 2020 in Fitoterapia
Verified
Journal Article
Closed access
TDThuc-Huy Duong
Thuc-Huy Duong
NHNguyễn Huy Hùng Huy
Nguyễn Huy Hùng Huy
TLThanh-Trung Le
Thanh-Trung Le
TTThanh-Nha Tran
Thanh-Nha Tran
JSJirapast Sichaem
Jirapast Sichaem
HLHoang-Duy Le
Hoang-Duy Le

1 September 2022 in Letters in Applied Microbiology
Verified
Journal Article
Closed access
PNPhuong Thi Nguyen
Phuong Thi Nguyen
NTN.-A. Vu Thi
N.-A. Vu Thi
XDX.-N. Nguyen Diep
X.-N. Nguyen Diep
TNThanh Ngoc Nguyen
Thanh Ngoc Nguyen
LBLe Minh Bui
Le Minh Bui

29 October 2024 in Antioxidants
Verified
Journal Article
Open access
PDF file
TDThuc-Huy Duong
Thuc-Huy Duong
JSJirapast Sichaem
Jirapast Sichaem
PTPhuong-Mai To
Phuong-Mai To
NPNhi Phan
Nhi Phan
PNPhuong Thi Nguyen
Phuong Thi Nguyen
JSJirapast Sichaem
Jirapast Sichaem
This study focused on bio-guided isolation based on antioxidant activities from Dicranopteris linearis spores and Averrhoa bilimbi branches. The total phenolic content (TPC), total flavonoid content (TFC), and antioxidant activities of the extracts were determined. For D. linearis spores, the ethyl acetate (EA) extract exhibited the highest TPC (120.13 ± 0.04 mg GAE/g) and TFC (21.94 ± 0.30 mg QE/g), along with strong DPPH antioxidant activity (96.3 ± 0.3% inhibition, IC50 of 39.4 ± 0.3 µg/mL). For A. bilimbi branches, the n-hexane–ethyl acetate (HEA) extract showed the highest TPC (165.21 ± 0.24 mg GAE/g) and TFC (26.20 ± 0.01 mg QE/g), with significant DPPH antioxidant activity (89.6 ± 0.7% inhibition, IC50 of 39.7 ± 1.9 µg/mL). Phytochemical investigation led to the identification of ten compounds (D1–D10) from D. linearis spores and twelve compounds (A1–A12) from A. bilimbi branches. Notably, compound A1 was identified as a new natural compound. The chemical structures were elucidated through NMR spectroscopy and comparison with existing literature. The antioxidant activities of selected compounds (D3–D5, D8–D10, and A1–A11) were evaluated using DPPH and ABTS free radical scavenging assays. Among them, compound A3 exhibited the strongest antioxidant activities (IC50 of 7.1 ± 0.1 µg/mL for DPPH and 14.8 ± 0.1 for ABTS, respectively). The results of this study highlight the potential of D. linearis and A. bilimbi for use in natural product-based antioxidant applications.

22 January 2024 in Polish Journal of Food and Nutrition Sciences
Verified
Journal Article
Open access
PDF file
PNPhuong Thi Nguyen
Phuong Thi Nguyen
QLQuang Thai Le
Quang Thai Le
LTLinh Thi Mai Tran
Linh Thi Mai Tran
KTKim Nhung Ta
Kim Nhung Ta
KNKhoa Thi Nguyen
Khoa Thi Nguyen
Purified and crude proteases have been broadly applied to obtain hydrolysates from soy protein isolate (SPI) with the improved functional and biological properties. However, the use of fruit juices containing native proteases to produce SPI hydrolysates with better bioactivities receives less...

3 January 2023 in TẠP CHÍ KHOA HỌC ĐẠI HỌC MỞ THÀNH PHỐ HỒ CHÍ MINH - KỸ THUẬT VÀ CÔNG NGHỆ
Verified
Journal Article
Open access
PDF file
PNPhuong Thi Nguyen
Phuong Thi Nguyen
NVNgô Nguyên Vũ
Ngô Nguyên Vũ
Pycnoporus sanguineus được giới thiệu là một loài nấm mang một loạt các hoạt tính sinh học và kháng khuẩn được coi là hoạt tính nổi bật nhất. Trong khi đó, hoạt tính kháng viêm và kháng oxy hóa của nấm P. sanguineus vẫn chưa được quan tâm nghiên cứu. Có một vài nghiên cứu nói về khả năng kháng oxy hóa và kháng viêm của P. sanguineus thông qua đánh giá tiềm năng của cao chiết và hợp chất từ hệ sợi nấm mà chưa có nghiên cứu chứng minh các hoạt tính của cao chiết nấm tiền quả thể. Do vậy, nghiên cứu được thực hiện nhằm đánh giá khả năng kháng oxy hóa bằng phương pháp DPPH và kháng viêm của P. sanguineus tiền quả thể trên mô hình tế bào Raw264.7 kích thích bởi lipopolysaccharide. Kết quả cho thấy, hoạt tính kháng oxy hóa của cao chiết P. sanguineus rất tốt với IC50 là 30.0 ± 0.54 µg/ml. Cao chiết P. sanguineus cũng thể hiện hoạt tính kháng viêm tốt, tại nồng độ cao chiết 12.5 và 25 µg/ml, nồng độ nitric oxide tạo ra giảm đáng kể so với đối chứng không sử dụng cao chiết. Như vậy, với tiềm năng kháng oxy hóa và kháng viêm, nấm P. sanguineus giai đoạn tiền quả thể phân lập tại Việt Nam có thể làm nguồn nguyên liệu để cô lập các hợp chất có hoạt tính kháng oxy hóa và kháng viêm trong tương lai.