排序方式: 共有21条查询结果,搜索用时 234 毫秒
1.
Sathish Paramasivan Ahmed Bassiouni Arron Shiffer Matthew R. Dillon Emily K. Cope Clare Cooksley Mahnaz Ramezanpour Sophia Moraitis Mohammad Javed Ali Benjamin Bleier Claudio Callejas Marjolein E. Cornet Richard G. Douglas Daniel Dutra Christos Georgalas Richard J. Harvey Peter H. Hwang Amber U. Luong Rodney J. Schlosser Pongsakorn Tantilipikorn Marc A. Tewfik Sarah Vreugde Peter-John Wormald J. Gregory Caporaso Alkis J. Psaltis 《Allergy》2020,75(8):2037-2049
The sinonasal microbiome remains poorly defined, with our current knowledge based on a few cohort studies whose findings are inconsistent. Furthermore, the variability of the sinus microbiome across geographical divides remains unexplored. We characterize the sinonasal microbiome and its geographical variations in both health and disease using 16S rRNA gene sequencing of 410 individuals from across the world. Although the sinus microbial ecology is highly variable between individuals, we identify a core microbiome comprised of Corynebacterium, Staphylococcus, Streptococcus, Haemophilus and Moraxella species in both healthy and chronic rhinosinusitis (CRS) cohorts. Corynebacterium (mean relative abundance = 44.02%) and Staphylococcus (mean relative abundance = 27.34%) appear particularly dominant in the majority of patients sampled. Amongst patients suffering from CRS with nasal polyps, a statistically significant reduction in relative abundance of Corynebacterium (40.29% vs 50.43%; P = .02) was identified. Despite some measured differences in microbiome composition and diversity between some of the participating centres in our cohort, these differences would not alter the general pattern of core organisms described. Nevertheless, atypical or unusual organisms reported in short-read amplicon sequencing studies and that are not part of the core microbiome should be interpreted with caution. The delineation of the sinonasal microbiome and standardized methodology described within our study will enable further characterization and translational application of the sinus microbiota. 相似文献
2.
3.
Praetip Khammultri Pongsakorn Chasing Chirawat Chitpakdee Supawadee Namuangruk Taweesak Sudyoadsuk Vinich Promarak 《RSC advances》2021,11(40):24794
Most highly efficient thermally activated delayed fluorescence (TADF)-based organic light-emitting diodes (OLEDs) are multi-layer devices fabricated by thermal vacuum evaporation techniques, which are unfavorable for real applications. However, there are only a few reported examples of efficient solution-processed TADF OLEDs, in particular TADF polymer OLEDs. Herein, a series of solution-processable TADF conjugated polymers (PCTXO/PCTXO-Fx (x = 25, 50 and 75)) were designed and synthesized by copolymerization of 2-(4-(diphenylamino)-phenyl)-9H-thioxanthen-9-one-10,10-dioxide (TXO-TPA) as a red/orange emissive TADF unit, 9,9′-((fluorene-9,9-diyl)-bis(octane-8,1-diyl))-bis(3,6-di-tert-butylcarbazole) as host/hole-transporting unit and 2,7-N-(heptadecan-9-yl)carbazole as a conjugated linker and solubilizing group. They possessed a conjugated backbone with donor TPA-carbazole/fluorene moieties and a pendent acceptor 9H-thioxanthen-9-one-10,10-dioxide (TXO) forming a twisted donor–acceptor structure. These polymers in neat films displayed red/orange color emissions (601–655 nm) with TADF properties, proved by theory calculations and transient PL decay measurements. Their hole-transporting capability was improved when the content of 9,9′-((fluorene-9,9-diyl)-bis(octane-8,1-diyl))-bis(3,6-di-tert-butylcarbazole) within the polymers increased. All polymers were successfully employed as emitters in solution-processed OLEDs. In particular, the doped OLED fabricated with PCTXO exhibited an intense deep orange emission at 603 nm with the best electroluminescence performance (a maximum external quantum efficiency 10.44%, a maximum current efficiency of 14.97 cd A−1 and a turn-on voltage of 4.2 V).TADF conjugated polymers having 2-(4-(diphenylamino)-phenyl)-9H-thioxanthen-9-one-10,10-dioxide as a TADF unit showed red/orange color emissions and enabled OLED devices with a maximum external quantum efficiency of 10.44% and a maximum current efficiency of 14.97 cd A−1 相似文献
4.
Tantilipikorn P Fritz M Tanabodee J Lanza DC Kennedy DW 《American journal of rhinology》2002,16(5):255-260
BACKGROUND: Recent evidence suggests that endoscopically obtained cultures from the middle meatus give comparable results to antral puncture for acute sinusitis. The best method for obtaining middle meatal cultures remains somewhat controversial because it has been theorized that specimens obtained with a swab are contaminated easily. This study compares endoscopic culture results from two different methods: swab and aspiration. Specifically, this study sought to determine whether or not the culture contamination rate is higher using the swab versus an aspiration technique. METHODS: One hundred consecutive culture specimensfrom 81 chronic rhinosinusitis patients were compared. Fifty cultures were obtained using a swab technique (group I) and another 50 cultures were obtained by aspirating pathological material into a sterile suction trap (group II). The patient populations in each group were similar; there were no differences in terms of age, gender, comorbid medical conditions, or prior medical therapy. Cultures were considered contaminated if they yielded normal nasal flora or if rare or few Staphylococcus coagulase-negative colonies grew after no bacteria was identified in gram stain. Staphylococcus aureus, Staphylococcus coagulase-negative, and Pseudomonas aeruginosa were the three most common organisms in both groups. RESULTS: Gram-negative bacteria were noted in 21/60 (35%) positive cultures. Although the contamination rate of the suction aspiration group (14%) was less than the endoscopic swab group (10%), this did not approach statistical significance (p = 0.75). CONCLUSIONS: Data from this study suggest that endoscopically guided aspiration of pathological material is no better than properly obtained swabs in directing antimicrobial therapy for chronic rhinosinusitis. 相似文献
5.
Suppression of Cholangiocarcinoma Cell Growth and Proliferation by Atractylodes lancea (Thunb) DC. through ERK-Signaling Cascade
下载免费PDF全文
![点击此处可从《Asian Pacific journal of cancer prevention》网站下载免费的PDF全文](/ch/ext_images/free.gif)
Pongsakorn Martviset Luxsana Panrit Pathanin Chantree Phunuch Muhamad Kesara Na-Bangchang 《Asian Pacific journal of cancer prevention》2021,22(11):3633-3640
Objective: The study aimed to investigate the inhibitory effects of AL on the ERK signaling molecules (ERK, p-ERK, cyclin D, and eIF4B) and the growth and proliferation of CCA cells. Materials and methods: The viability of the three CCA cell lines CL-6, HuCCT1, and HuH28 was determined using MTT assay. The effect of Ras/ERK inhibitors on protein expression in the presence of AL extract was investigated. The protein extracted from each CCA cell following exposure to AL and/or Ras/ERK inhibitors were separated on 12.5% SDS-PAGE. The analysis of mRNA expression following 48 and 72 hours of AL exposure in comparison with 0 hours (non-exposed cells) was performed by using RT-PCR. Results: The potency of cytotoxic activity of AL (by MTT assay) was about three times higher than the standard drug 5-fluorouracil. The IC50 (concentration that inhibits cell growth by 50%) of AL for the CL-6, HuCCT-1 and HuH28 cell lines were 29.77±6.64, 35.45±4.96, and 35.32±6.69 µg/mL (mean+SD), respectively. The cells were exposed to AL extract at the IC50 for 0, 12, 24, 48, and 72 hours in the absence and presence of Ras/ERK inhibitors (salirasib and XMD8-92). Protein expression was determined by Western blot analysis. The results suggested the lack of significant inhibitory effect of AL on ERK at 48 and 72 hours of exposure in all CCA cell types. On the other hand, a significant inhibitory effect was observed with p-ERK expression in all CCA cell types. Cyclin D was significantly down-regulated at 72 hours of exposure in all cell types with different potencies. The expression of eIF4B was markedly inhibited in HuCCT-1 but slightly inhibited in CL-6 and HuH28 cells. Real-time PCR analysis revealed significant down-regulation of ERK following 72 hours of AL exposure in the HuCCT1 and HuH28, but not CL-6 cell. Conclusion: The ERK signaling cascade and downstream molecules are potential targets of action of AL in CCA. 相似文献
6.
Tantilipikorn P Auewarakul P 《Asian Pacific journal of allergy and immunology / launched by the Allergy and Immunology Society of Thailand》2011,29(2):113-119
There are complex interactions between airway allergy and viral infection. Available evidence suggests that viral respiratory infection can initiate, maintain and activate exacerbation of allergic conditions in respiratory tract. Innate and inflammatory responses to acute viral infection play important roles in its relationship to allergic reactions. On the other hand, biased immune responses toward Th2 caused by an allergic reaction may make the immune response ineffective in combating viral infection. It was previously shown that allergy can increase the expression level of rhinovirus receptors on mucosal epithelial cells. This suggests that airway allergy may increase the risk of rhinovirus infection. We have recently shown that allergy may also increase the expression level of influenza virus receptors. This suggests that airway allergy and viral infection may have a reciprocal interaction. The effect of allergy on the risk and outcome of viral infection needs to be further confirmed in clinical studies and its potential implication for clinical practice should be considered. 相似文献
7.
8.
9.
10.
Jate Lumyongsatien Waralak Yangsakul Chaweewan Bunnag Claire Hopkins Pongsakorn Tantilipikorn 《BMC ear, nose, and throat disorders》2017,17(1):14