Your browser doesn't support javascript.
loading
Mostrar: 20 | 50 | 100
Resultados 1 - 20 de 39
Filtrar
1.
Anticancer Res ; 44(6): 2271-2285, 2024 Jun.
Artículo en Inglés | MEDLINE | ID: mdl-38821615

RESUMEN

The gut microbiota has been implicated in many cancers through the secretion of blood-traveling metabolites or activation of oncogenic signaling. Currently, specific microbial signatures have been detected in the human breast, which are different from other microbial-rich compartments, such as the intestine and skin. Changes in the breast microbiome profile have been shown to positively or negatively correlate with breast cancer development, progression, and therapeutic outcomes. However, studies regarding the role and underlying mechanism of intratumoral microbiota in breast cancer have remained concealed. This review aimed to provide an overview of the role of the intratumoral microbiome in tumorigenesis and tumor progression, and how these intratumoral microbiota affect breast cancer. We also discuss the potential of using the intratumoral microbiome as a biomarker or treatment alternative in breast cancers.


Asunto(s)
Neoplasias de la Mama , Progresión de la Enfermedad , Microbiota , Femenino , Humanos , Neoplasias de la Mama/microbiología , Neoplasias de la Mama/patología , Neoplasias de la Mama/terapia , Carcinogénesis , Resultado del Tratamiento , Mama/microbiología , Mama/patología
2.
Biomolecules ; 14(1)2024 Jan 05.
Artículo en Inglés | MEDLINE | ID: mdl-38254674

RESUMEN

Triple-negative breast cancer (TNBC) is the most aggressive and fatal breast cancer subtype. Nowadays, chemotherapy remains the standard treatment of TNBC, and immunotherapy has emerged as an important alternative. However, the high rate of TNBC recurrence suggests that new treatment is desperately needed. Schisandrin B (Sch B) has recently revealed its anti-tumor effects in cancers such as cholangiocarcinoma, hepatoma, glioma, and multi-drug-resistant breast cancer. However, there is still a need to investigate using Sch B in TNBC treatment. Interleukin (IL)-1ß, an inflammatory cytokine that can be expressed and produced by the cancer cell itself, has been suggested to promote BC proliferation and progression. In the current study, we present evidence that Sch B can significantly suppress the growth, migration, and invasion of TNBC cell lines and patient-derived TNBC cells. Through inhibition of inflammasome activation, Sch B inhibits interleukin (IL)-1ß production of TNBC cells, hindering its progression. This was confirmed using an NLRP3 inhibitor, OLT1177, which revealed a similar beneficial effect in combating TNBC progression. Sch B treatment also inhibits IL-1ß-induced EMT expression of TNBC cells, which may contribute to the anti-tumor response.


Asunto(s)
Neoplasias de los Conductos Biliares , Lignanos , Compuestos Policíclicos , Neoplasias de la Mama Triple Negativas , Humanos , Neoplasias de la Mama Triple Negativas/tratamiento farmacológico , Proteína con Dominio Pirina 3 de la Familia NLR , Interleucina-1beta , Conductos Biliares Intrahepáticos , Ciclooctanos
3.
Anticancer Res ; 43(12): 5283-5298, 2023 Dec.
Artículo en Inglés | MEDLINE | ID: mdl-38030174

RESUMEN

Breast cancer (BC) is a common malignancy in women, with hormone receptor (HR)-positive subtype responsible for approximately 70% of cases. Currently, patients with metastatic HR-positive BC rely on endocrine therapy and cyclin-dependent kinase (CDK)-4/6 inhibitors for treatment. Currently, approved CDK4/6 inhibitors include palbociclib, ribociclib, and abemaciclib. However, clinical evidence of CDK-4/6 inhibitor resistance is emerging, suggesting that the gap in the knowledge of its resistance mechanism requires further investigation. This review discusses the mechanisms of CDK4/6 inhibitor resistance in BC, including both intrinsic and extrinsic mechanisms. We also discuss possible alternative strategies to overcome CDK4/6 inhibitor resistance in future clinical applications.


Asunto(s)
Neoplasias de la Mama , Humanos , Femenino , Neoplasias de la Mama/tratamiento farmacológico , Neoplasias de la Mama/patología , Inhibidores de Proteínas Quinasas/farmacología , Aminopiridinas/uso terapéutico , Aminopiridinas/farmacología , Proteínas Inhibidoras de las Quinasas Dependientes de la Ciclina , Quinasa 4 Dependiente de la Ciclina , Quinasa 6 Dependiente de la Ciclina
4.
Breast Cancer (Auckl) ; 17: 11782234231215183, 2023.
Artículo en Inglés | MEDLINE | ID: mdl-38024140

RESUMEN

Metaplastic breast carcinoma is an invasive carcinoma with a high differentiation rate of the neoplastic epithelium toward mesenchymal-like epithelium. It comprises of only less than 1% of all breast cancers. Although 80% to 90% of metaplastic breast carcinomas are triple-negative cancers, they usually have worse outcomes than other triple-negative breast cancers (TNBCs). Metaplastic carcinoma is also often refractory to cytotoxic chemotherapy. Here, we reported a case of a 61-year-old female patient, presenting with a solitary and pedunculated mass in the right axillary tail breast tissue, whose biopsy revealed metaplastic breast carcinoma with chondroid differentiation. She had failed neoadjuvant chemotherapy and immunotherapy. Although she received debulking surgery, the tumor regrew even faster before surgery. Despite receiving palliative chemotherapy, the patient died 11 weeks after surgery. This case draws attention to physicians that early recognition and surgery may be more beneficial than chemotherapy in combating metaplastic breast carcinoma.

5.
Int J Mol Sci ; 24(18)2023 Sep 13.
Artículo en Inglés | MEDLINE | ID: mdl-37762330

RESUMEN

Interleukin (IL)-8 plays a vital role in regulating inflammation and breast cancer formation by activating CXCR1/2. We previously designed an antagonist peptide, (RF16), to inhibits the activation of downstream signaling pathways by competing with IL-8 in binding to CXCR1/2, thereby inhibiting IL-8-induced chemoattractant monocyte binding. To evaluate the effect of the RF16 peptide on breast cancer progression, triple-negative MDA-MB-231 and ER-positive MCF-7 breast cancer cells were used to investigate whether RF16 can inhibit the IL-8-induced breast cancer metastasis. Using growth, proliferation, and invasiveness assays, the results revealed that RF16 reduced cell proliferation, migration, and invasiveness in MDA-MB-231 cells. The RF16 peptide also regulated the protein and mRNA expressions of epithelial-mesenchymal transition (EMT) markers in IL-8-stimulated MDA-MB-231 cells. It also inhibited downstream IL-8 signaling and the IL-8-induced inflammatory response via the mitogen-activated protein kinase (MAPK) and Phosphoinositide 3-kinase (PI3K) pathways. In the xenograft tumor mouse model, RF16 synergistically reinforces the antitumor efficacy of docetaxel by improving mouse survival and retarding tumor growth. Our results indicate that RF16 significantly inhibited IL-8-stimulated cell growth, migration, and invasion in MDA-MB-231 breast cancer cells by blocking the activation of p38 and AKT cascades. It indicated that the RF16 peptide may serve as a new supplementary drug for breast cancer.


Asunto(s)
Neoplasias de la Mama , Neoplasias de la Mama Triple Negativas , Humanos , Animales , Ratones , Femenino , Células MDA-MB-231 , Fosfatidilinositol 3-Quinasas/metabolismo , Interleucina-8/genética , Interleucina-8/farmacología , Transducción de Señal , Neoplasias de la Mama/patología , Proliferación Celular , Línea Celular Tumoral , Movimiento Celular , Transición Epitelial-Mesenquimal , Neoplasias de la Mama Triple Negativas/patología
6.
J Microbiol Immunol Infect ; 56(5): 1026-1035, 2023 Oct.
Artículo en Inglés | MEDLINE | ID: mdl-37586915

RESUMEN

BACKGROUND: Acinetobacter nosocomialis (A. nosocomialis) is a glucose non-fermentative, gram-negative bacillus that belongs to the Acinetobacter calcoaceticus-baumannii complex. In recent years, studies have found an increased clinical prevalence of A. nosocomialis. However, given the increasing trend of antibiotic resistance, developing new antibacterial agents is vital. Currently, research regarding bacteriophage therapy against A. nosocomialis is only limited. METHODS: Two A. nosocomialis bacteriophages, TCUAN1 and TCUAN2, were isolated from sewage. Experiments such as transmission electron microscopy (TEM), host-range analysis, and sequencing were performed to determine their biological and genomic characteristics. TCUAN2 were further subjected to in vivo experiments and their derived-endolysin were cloned and tested against their bacteria host. RESULTS: Transmission electron microscopy revealed that TCUAN1 and TCUAN2 belong to Myoviridae and Podoviridae, respectively. Both phages show a broad host spectrum and rapid adsorption efficiency. Further biological analysis showed that TCUAN2 possesses a shorter latent period and larger burst size compared to TCUAN1. Because TCUAN2 showed a better antibacterial activity, it was injected into A. nosocomialis-infected mice which resulted in a significant decrease in bacterial load levels in the blood and increased the mice's survival. Finally, genomic analysis revealed that the complete nucleotide sequence of TCUAN1 is 49, 691 bps (containing 75 open reading frames) with a G + C content of 39.3%; whereas the complete nucleotide sequence of TCUAN2 is 41, 815 bps (containing 68 open reading frames) with a G + C content of 39.1%. The endolysin gene cloned and purified from TCUAN2 also showed antibacterial activity when used with a chelator EDTA.


Asunto(s)
Acinetobacter baumannii , Bacteriófagos , Sepsis , Animales , Ratones , Bacteriófagos/genética , Antibacterianos/farmacología
7.
Nutrients ; 15(8)2023 Apr 15.
Artículo en Inglés | MEDLINE | ID: mdl-37111128

RESUMEN

Excessive alcohol consumption can lead to serious health complications, with liver and neurological complications being the most important. In Western nations, alcoholic liver disease accounts for 50% of mortality from end-stage liver disease and is the second most common cause of liver transplants. In addition to direct damage, hepatic encephalopathy may also arise from alcohol consumption. However, effective treatment for liver disease, as well as neurological injury, is still lacking today; therefore, finding an efficacious alternative is urgently needed. In the current study, the preventive and therapeutic effects of Schisandrin B (Sch B) against ethanol-induced liver and brain injuries were investigated. By using two treatment models, our findings indicated that Sch B can effectively prevent and ameliorate alcoholic liver diseases, such as resolving liver injuries, lipid deposition, inflammasome activation, and fibrosis. Moreover, Sch B reverses brain damage and improves the neurological function of ethanol-treated mice. Therefore, Sch B may serve as a potential treatment option for liver diseases, as well as subsequential brain injuries. Furthermore, Sch B may be useful in preventive drug therapy against alcohol-related diseases.


Asunto(s)
Lesiones Encefálicas , Lignanos , Ratones , Animales , Etanol/efectos adversos , Hígado , Lignanos/farmacología
8.
J Microbiol Immunol Infect ; 56(3): 477-489, 2023 Jun.
Artículo en Inglés | MEDLINE | ID: mdl-36964051

RESUMEN

BACKGROUND: In most developing or undeveloped countries, patients are often co-infected with multiple pathogens rather than a single pathogen. While different pathogens have their impact on morbidity and mortality, co-infection of more than one pathogen usually made the disease outcome different. Many studies reported the co-infection of Schistosoma with Salmonella in pandemic areas. However, the link or the underlying mechanism in the pathogenesis caused by Schistosoma-Salmonella co-infection is still unknown. METHODS: In this study, Salmonella typhimurium (S. typhimurium) was challenged to Schistosoma mansoni (S. mansoni)-infected mice. Further experiments such as bacterial culture, histopathological examination, western blotting, and flow cytometry were performed to evaluate the outcomes of the infection. Cytokine responses of the mice were also determined by ELISA and real-time quantitative PCR. RESULTS: Our results demonstrated that co-infected mice resulted in higher bacterial excretion in the acute phase but higher bacterial colonization in the chronic phase. Lesser egg burden was also observed during chronic schistosomiasis. Infection with S. typhimurium during schistosomiasis induces activation of the inflammasome and apoptosis, thereby leading to more drastic tissue damage. Interestingly, co-infected mice showed a lower fibrotic response in the liver and spleen. Further, co-infection alters the immunological functioning of the mice, possibly the reason for the observed pathological outcomes. CONCLUSION: Collectively, our findings here demonstrated that S. mansoni-infected mice challenged with S. typhimurium altered their immunological responses, thereby leading to different pathological outcomes.


Asunto(s)
Coinfección , Infecciones por Salmonella , Esquistosomiasis mansoni , Esquistosomiasis , Animales , Ratones , Esquistosomiasis mansoni/complicaciones , Esquistosomiasis mansoni/patología , Salmonella typhimurium , Bazo/patología , Coinfección/microbiología , Hígado/patología , Schistosoma mansoni/fisiología , Infecciones por Salmonella/patología , Fibrosis
9.
J Microbiol Immunol Infect ; 55(4): 634-642, 2022 Aug.
Artículo en Inglés | MEDLINE | ID: mdl-35717525

RESUMEN

BACKGROUND: Elizabethkingia anophelis is an opportunistic pathogen that infects newborns and immunocompromised patients. Because the infection is associated with high mortality as a result of its intrinsic resistance to antibiotics, alternative treatment methods are needed. Our previous study successfully isolated the world's first E. anophelis phage, TCUEAP1, which showed beneficial protection to E. anophelis-infected mice. More new bacteriophages are needed in order to provide sufficient choices to combat E. anophelis infections. METHODS: In the current study, two new phages infecting E. anophelis were isolated from wastewater and were designated as TCUEAP2 and TCUEAP3. Further experiments, namely, transmission electron microscopy (TEM), infection assay, host-range analysis, and sequencing were performed to determine their biological and genomic characteristics. RESULTS: TEM analysis revealed that both TCUEAP2 and TCUEAP3 possess an icosahedral head with a non-contractile tail, and belong to the Siphoviridae family. Further experiments revealed that TCUEAP3 has a longer latent period and higher burst size compared to TCUEAP2. Host range analysis showed that both TCUEAP2 and TCUEAP3 have a narrow host range, infecting only their respective hosts. The genomic size of phage TCUEAP2 was 42,403 bps containing 61 predicted open reading frames (ORFs), whereas the genome size of TCUEAP3 was 37,073 bps containing 40 predicted ORFs. CONCLUSION: Due to the distinct biological characteristics of TCUEAP2 and TCUEAP3, they may be satisfactory for clinical uses such as preparation of phage cocktails or decontamination in clinical settings.


Asunto(s)
Bacteriófagos , Infecciones por Flavobacteriaceae , Flavobacteriaceae , Animales , Genoma Viral , Genómica , Ratones
10.
J Microbiol Immunol Infect ; 55(4): 757-765, 2022 Aug.
Artículo en Inglés | MEDLINE | ID: mdl-35654701

RESUMEN

BACKGROUND: Schistosomiasis is one of the most devastating tropical diseases in the world. Currently, praziquantel (PZQ) represents the best pharmacological option for the treatment of schistosomiasis as it effectively kills the worm. However, the inability to reverse established liver damages often makes treatment futile. In the current study, we investigate whether combining the use of wogonin, a compound that was found to be liver-protective, with PZQ can attribute to the greatest beneficial effect in Schistosoma mansoni-infected mice. METHODS: To determine the protective effect of PZQ-wogonin treatment on S. manosni-infected mice, histopathological analysis was done to evaluate the granuloma size and fibrotic areas in the liver. Western blotting was performed to analyze several injuries-related markers including fibrotic markers, inflammasomes, and apoptotic markers. Scanning electron microscopy was done to evaluate the effect of wogonin on the worms, and the worm and egg burden was calculated. RESULTS: Our results showed that PZQ-wogonin treatment significantly improved liver histopathology of S. mansoni-infected mice. Further analysis showed that PZQ-wogonin combinations are more effective in reducing fibrosis, inflammation, and apoptosis in the liver than that of individual drug use. Furthermore, our results revealed that wogonin is anthelmintic; and it works better with PZQ in reducing hepatic egg burden, further lessen the disease progression. CONCLUSION: In general, this combinatorial strategy may represent a new and effective approach to schistosomiasis treatment.


Asunto(s)
Antihelmínticos , Esquistosomiasis mansoni , Esquistosomiasis , Animales , Flavanonas , Hígado , Ratones , Praziquantel , Schistosoma mansoni
11.
Parasitol Int ; 88: 102553, 2022 Jun.
Artículo en Inglés | MEDLINE | ID: mdl-35124287

RESUMEN

Cryptosporidium spp. is a group of protozoans that cause diarrheal disease in both humans and animals. In Taiwan, very little information is available about the epidemiology of Cryptosporidium spp. in domesticated animals, especially in Eastern Taiwan where agriculture is one of the main industries. Therefore, this study aimed to investigate the occurrence of Cryptosporidium spp. in livestock in Hualien Country of Eastern Taiwan and identify their genotypes. Excrements from dogs (n = 81), cattle (n = 156), and pigs (n = 142) were randomly collected from different pastures or farm in Hualien Country. Microscopic examination and nested PCR were performed on all samples and both showed identical results, with 4.94% (4/81) of dogs, 24.36% (38/156) of cattle, and 16.20% (23/142) of pigs being infected with Cryptosporidium species. Positive samples were then sequenced and analyzed. DNA sequencing revealed that all four positive samples isolated from dogs were Cryptosporidium canis (C. canis); 38 positive samples from cattle were identified as C. bovis (8/38), C. canis (1/38), C. ryanae (4/38), and C. scrofarum (25/38); and 22 positive samples isolated from pigs were identified as C. scrofarum while one was identified as C. suis. In addition, the infective rates of animals from indoor farms (57.14% of all positive samples) are much higher than the rates from pastures. This study provided evidence of the occurrence of Cryptosporidium spp. in Hualien country, and farming conditions largely affect their infection rates. Therefore, precautions should be made to control Cryptosporidium spp. transmission.


Asunto(s)
Enfermedades de los Bovinos , Criptosporidiosis , Cryptosporidium , Enfermedades de los Porcinos , Animales , Bovinos , Enfermedades de los Bovinos/epidemiología , Criptosporidiosis/epidemiología , Cryptosporidium/genética , Perros , Heces , Genotipo , Ganado , Prevalencia , Porcinos , Enfermedades de los Porcinos/epidemiología , Taiwán/epidemiología
12.
Parasitol Int ; 86: 102446, 2022 Feb.
Artículo en Inglés | MEDLINE | ID: mdl-34481947

RESUMEN

After many years of the excessive use of praziquantel against Schistosoma mansoni (S. mansoni), it has already led to the development of drug resistance. While schistosomiasis is still affecting millions of people every year, vaccination may be one realistic alternative way to control the disease. Currently, S. mansoni 14-kDa fatty acid-binding protein (Sm14) has shown promising results as a vaccine antigen. Yet, the use of an adjuvant may be necessary to further increase the effectiveness of the vaccine. Herein, we investigated the potential of using heat-killed Cutibacterium acnes (C. acnes) as an adjuvant for recombinant Sm14 (rSm14). Immunization of mice with C. acnes-adjuvanted rSm14 showed increased humoral immune responses, compared with mice immunized with rSm14 alone. Additionally, C. acnes-adjuvanted rSm14 vaccination provided higher protection to mice against S. mansoni infection and liver injuries. These results suggest that C. acnes increases the immunogenicity of rSm14, which leads to better protection against S. mansoni infection. Therefore, heat-killed C. acnes may be a promising adjuvant to use with rSm14.


Asunto(s)
Proteínas de Transporte de Ácidos Grasos/inmunología , Proteínas del Helminto/inmunología , Inmunogenicidad Vacunal , Propionibacteriaceae/química , Schistosoma mansoni/inmunología , Esquistosomiasis mansoni/prevención & control , Vacunas/inmunología , Adyuvantes Inmunológicos/administración & dosificación , Animales , Femenino , Masculino , Ratones , Ratones Endogámicos BALB C
13.
Int J Parasitol ; 52(5): 275-284, 2022 04.
Artículo en Inglés | MEDLINE | ID: mdl-34875254

RESUMEN

Schistosomiasis is a tropical parasitic disease, in which the major clinical manifestation includes hepatosplenomegaly, portal hypertension, and organs fibrosis. Clinically, treatment of schistosomiasis involves the use of praziquantel (PZQ) and supportive care, which does not improve the patient's outcome as liver injuries persist. Here we show the beneficial effects of using PZQ in combination with Schisandrin B (Sch B). Concomitant treatment with PZQ and Sch B resulted in a significant improvement of hepatosplenomegaly and fibrosis, compared with single-agent treatment. We also demonstrated that PZQ-Sch B treatment ameliorates injuries in the lungs and intestine better than the sole use of PZQ or Sch B. In addition, PZQ-Sch B treatment improves the survival of S. mansoni-infected mice, and the treatment combination yields better therapeutic outcomes, as indicated by a partial improvement in neurological function. These results were accompanied by a reduction in neurological injuries. Collectively, we suggest that PZQ-Sch B concomitant therapy may be useful to alleviate schistosomiasis-associated liver injuries and prevent systemic complications.


Asunto(s)
Antihelmínticos , Compuestos Policíclicos , Esquistosomiasis mansoni , Animales , Antihelmínticos/farmacología , Ciclooctanos , Lignanos , Ratones , Compuestos Policíclicos/farmacología , Compuestos Policíclicos/uso terapéutico , Praziquantel , Schistosoma mansoni , Esquistosomiasis mansoni/complicaciones , Esquistosomiasis mansoni/tratamiento farmacológico , Esquistosomiasis mansoni/parasitología
14.
J Microbiol Immunol Infect ; 55(2): 314-322, 2022 Apr.
Artículo en Inglés | MEDLINE | ID: mdl-34167886

RESUMEN

BACKGROUND/PURPOSE: Schistosomiasis is an important tropical disease caused by Schistosoma. Although the pathogenesis of liver fibrosis has been intensively studied, the choice of effective treatment is still inadequate. In this study, we aimed to investigate the potential of using Casticin to treat Schistosoma mansoni-induced liver fibrosis. METHODS: BALB/c mice were divided into three groups - control, infection, and treatment group. The infection and treatment group were percutaneously infected with 100-120 cercariae. Mice from the treatment group were treated with 20 mg/kg/day Casticin for 14 consecutive days to investigate the potential protective effects of Casticin. Mice were sacrificed and were used for histological, RNA, protein, and parasite burden analysis. RESULTS: Our results showed that hepatic fibrosis was significantly attenuated, as indicated by histology and reduction of fibrotic markers such as collagen AI, transforming growth factor ß (TGF-ß), and α-smooth muscle actin (α-SMA). Furthermore, Casticin treatment significantly reduced worm burden. Anthelmintic effect of Casticin was also observed by scanning electron microscopy. CONCLUSION: Collectively, our study suggested that Casticin may be a beneficial candidate in treating S. mansoni infection.


Asunto(s)
Antihelmínticos , Antiinfecciosos , Esquistosomiasis mansoni , Animales , Antihelmínticos/farmacología , Antihelmínticos/uso terapéutico , Antiinfecciosos/farmacología , Flavonoides , Humanos , Hígado/patología , Cirrosis Hepática/tratamiento farmacológico , Cirrosis Hepática/patología , Ratones , Ratones Endogámicos BALB C , Praziquantel/farmacología , Praziquantel/uso terapéutico , Schistosoma mansoni , Esquistosomiasis mansoni/tratamiento farmacológico , Esquistosomiasis mansoni/parasitología , Esquistosomiasis mansoni/patología
15.
BMC Public Health ; 21(1): 1861, 2021 10 15.
Artículo en Inglés | MEDLINE | ID: mdl-34654385

RESUMEN

BACKGROUND: In Australia, Chinese migrants are among the populations most affected by hepatitis B virus (HBV) infection but often experience late diagnosis or access to clinical care. This study aims to explore approaches to increase HBV testing in Australia's Chinese community and inform evaluation planning, specifically to i) assess the feasibility and acceptability of HBV educational programs, and ii) compare HBV testing uptake in people receiving a tailored education resource focussing on liver cancer prevention compared with a standard HBV education package. METHODS: This is a pre-post mixed-methods pilot and feasibility study. People of Chinese ethnicity and unsure of their HBV infection or immunity status were recruited from ten community sites in Melbourne, Australia in 2019-2020. Participants were randomised to receive an education package (comprised of a leaflet and in-person one-on-one educational session) with a focus on either 1) standard HBV-related information, or 2) liver cancer prevention. Participants completed a baseline questionnaire prior to receiving the intervention and were followed up at 6 months' time for a questionnaire and an opt-in semi-structured interview. Primary study outcomes included feasibility of study procedures, measured by recruitment, participation, and retention rates; acceptability of the education program assessed by acceptability scores; and HBV testing uptake rate in each arm. Secondary outcomes include HBV-related knowledge change, assessed by pre-post comparison; and factors affecting participants' testing behaviour analysed using qualitative data. RESULTS: Fifty-four participants received an education package; baseline and follow-up data from 33 (61%) were available. The study procedures of recruitment and retention were feasible; the acceptability of the education program was moderate with improved HBV-related knowledge observed. Four participants self-reported being tested: one (1/15, 7%) in the standard HBV information group and three (3/18, 17%) in the liver cancer prevention information group. Factors identified as affecting testing included perceived relevance and seriousness of HBV, healthcare access and costs of testing, and perceptions of the role of primary care providers in HBV-related care. CONCLUSION: A tailored education program targeting ethnic Chinese in Australia was feasible with moderate acceptability. A larger study is required to determine if a liver cancer prevention message would improve HBV testing uptake in Chinese community than standard HBV education message. Supports from healthcare providers, community-based testing programs, and public health education programs are likely needed to motivate diagnostic testing among Chinese people at risk of HBV infection.


Asunto(s)
Etnicidad , Hepatitis B , Australia , China , Estudios de Factibilidad , Hepatitis B/diagnóstico , Hepatitis B/prevención & control , Humanos , Proyectos Piloto
16.
Tzu Chi Med J ; 33(3): 203-211, 2021.
Artículo en Inglés | MEDLINE | ID: mdl-34386356

RESUMEN

Breast cancer (BC) is a frequently diagnosed cancer among women worldwide. Currently, BC can be divided into different subgroups according to the presence of the following hormone receptors: estrogen receptor, progesterone receptor, and human epidermal growth factor receptor 2. Each of these subgroups has different treatment strategies. However, the presence of new metastatic lesions and patient deterioration suggest resistance to a given treatment. Various lines of evidence had shown that cytokines are one of the important mediators of tumor growth, invasion, metastasis, and treatment resistance. Interleukin-10 (IL-10) is an immunoregulatory cytokine, and acts as a poor prognostic marker in many cancers. The anti-inflammatory IL-10 blocks certain effects of inflammatory cytokines. It also antagonizes the co-stimulatory molecules on the antigen-presenting cells. Here, we review the current knowledge on the function and molecular mechanism of IL-10, and recent findings on how IL-10 contributes to the progression of BC.

17.
Microbiol Spectr ; 9(1): e0034221, 2021 09 03.
Artículo en Inglés | MEDLINE | ID: mdl-34346748

RESUMEN

As the COVID-19 pandemic progresses, there is an increasing need for rapid, accessible assays for SARS-CoV-2 detection. We present a clinical evaluation and real-world implementation of the INDICAID COVID-19 rapid antigen test (INDICAID rapid test). A multisite clinical evaluation of the INDICAID rapid test using prospectively collected nasal (bilateral anterior) swab samples from symptomatic subjects was performed. The INDICAID rapid test demonstrated a positive percent agreement (PPA) and negative percent agreement (NPA) of 85.3% (95% confidence interval [95% CI], 75.6% to 91.6%) and 94.9% (95% CI, 91.6% to 96.9%), respectively, compared to laboratory-based reverse transcriptase PCR (RT-PCR) using nasal specimens. The INDICAID rapid test was then implemented at COVID-19 outbreak screening centers in Hong Kong as part of a testing algorithm (termed "dual-track") to screen asymptomatic individuals for prioritization for confirmatory RT-PCR testing. In one approach, preliminary positive INDICAID rapid test results triggered expedited processing for laboratory-based RT-PCR, reducing the average time to confirmatory result from 10.85 h to 7.0 h. In a second approach, preliminary positive results triggered subsequent testing with an onsite rapid RT-PCR, reducing the average time to confirmatory result to 0.84 h. In 22,994 asymptomatic patients, the INDICAID rapid test demonstrated a PPA of 84.2% (95% CI, 69.6% to 92.6%) and an NPA of 99.9% (95% CI, 99.9% to 100%) compared to laboratory-based RT-PCR using combined nasal/oropharyngeal specimens. The INDICAID rapid test has excellent performance compared to laboratory-based RT-PCR testing and, when used in tandem with RT-PCR, reduces the time to confirmatory positive result. IMPORTANCE Laboratory-based RT-PCR, the current gold standard for COVID-19 testing, can require a turnaround time of 24 to 48 h from sample collection to result. The delayed time to result limits the effectiveness of centralized RT-PCR testing to reduce transmission and stem potential outbreaks. To address this, we conducted a thorough evaluation of the INDICAID COVID-19 rapid antigen test, a 20-minute rapid antigen test, in both symptomatic and asymptomatic populations. The INDICAID rapid test demonstrated high sensitivity and specificity with RT-PCR as the comparator method. A dual-track testing algorithm was also evaluated utilizing the INDICAID rapid test to screen for preliminary positive patients, whose samples were then prioritized for RT-PCR testing. The dual-track method demonstrated significant improvements in expediting the reporting of positive RT-PCR test results compared to standard RT-PCR testing without prioritization, offering an improved strategy for community testing and controlling SARS-CoV-2 outbreaks.


Asunto(s)
Antígenos Virales/análisis , Enfermedades Asintomáticas , Prueba de COVID-19/métodos , COVID-19/diagnóstico , COVID-19/inmunología , SARS-CoV-2/aislamiento & purificación , Adulto , Técnicas de Laboratorio Clínico/métodos , Reacciones Falso Negativas , Reacciones Falso Positivas , Femenino , Hong Kong , Humanos , Masculino , Tamizaje Masivo/métodos , Persona de Mediana Edad , Pandemias , Reacción en Cadena de la Polimerasa , SARS-CoV-2/genética , Sensibilidad y Especificidad , Manejo de Especímenes , Factores de Tiempo , Adulto Joven
18.
Int J Mol Sci ; 22(13)2021 Jun 29.
Artículo en Inglés | MEDLINE | ID: mdl-34209998

RESUMEN

Acne vulgaris, which is mostly associated with the colonization of Cutibacterium acnes (C. acnes), is a common skin inflammatory disease in teenagers. However, over the past few years, the disease has extended beyond childhood to chronically infect approximately 40% of adults. While antibiotics have been used for several decades to treat acne lesions, antibiotic resistance is a growing crisis; thus, finding a new therapeutic target is urgently needed. Studies have shown that phage therapy may be one alternative for treating multi-drug-resistant bacterial infections. In the present study, we successfully isolated a C. acnes phage named TCUCAP1 from the skin of healthy volunteers. Morphological analysis revealed that TCUCAP1 belongs to the family Siphoviridae with an icosahedral head and a non-contractile tail. Genome analysis found that TCUCAP1 is composed of 29,547 bp with a G+C content of 53.83% and 56 predicted open reading frames (ORFs). The ORFs were associated with phage structure, packing, host lysis, DNA metabolism, and additional functions. Phage treatments applied to mice with multi-drug-resistant (MDR) C.-acnes-induced skin inflammation resulted in a significant decrease in inflammatory lesions. In addition, our attempt to formulate the phage into hydroxyethyl cellulose (HEC) cream may provide new antibacterial preparations for human infections. Our results demonstrate that TCUCAP1 displays several features that make it an ideal candidate for the control of C. acnes infections.


Asunto(s)
Acné Vulgar/terapia , Terapia de Fagos/métodos , Propionibacterium acnes/virología , Siphoviridae/clasificación , Secuenciación Completa del Genoma/métodos , Acné Vulgar/microbiología , Animales , Composición de Base , Celulosa/química , Modelos Animales de Enfermedad , Composición de Medicamentos , Farmacorresistencia Bacteriana Múltiple , Tamaño del Genoma , Genoma Viral , Voluntarios Sanos , Humanos , Inyecciones Intradérmicas , Ratones , Sistemas de Lectura Abierta , Filogenia , Propionibacterium acnes/fisiología , Siphoviridae/genética , Siphoviridae/aislamiento & purificación , Piel/virología
19.
Acta Trop ; 222: 106033, 2021 Oct.
Artículo en Inglés | MEDLINE | ID: mdl-34224719

RESUMEN

Sm28GST is one of the candidate antigens for Schistosoma mansoni vaccine. Already Sm28GST vaccine formulations have shown to be protective against S. mansoni infection. Currently, efforts have been put into finding an adjuvant to enhance the immunity induced by Sm28GST. In the present work, we investigated whether heat-killed Propionibacterium acnes can be served as a potential adjuvant for recombinant Sm28GST (rSm28GST) antigen. As the results showed, P. acnes successfully modulated the Th1 humoral immune response induced by rSm28GST. Stronger Th1 cytokines responses were also observed in mice immunized with P. acnes-adjuvanted rSm28GST. Immunization of mice with P. acnes-adjuvanted rSm28GST was able to reduce worm burden and hepatic egg burden by 54.20 and 73.61%. Reduced granuloma size and count, as well as improved liver histology, were seen in P. acnes-adjuvanted rSm28GST immunized mice. These data suggest that P. acnes may evoke a stronger rSm28GST-induced immune response, higher resistance to S. mansoni infection, and more profound protection against S. mansoni-induced liver damages.


Asunto(s)
Antígenos Helmínticos/inmunología , Glutatión Transferasa/inmunología , Propionibacterium acnes , Esquistosomiasis mansoni , Vacunas/inmunología , Adyuvantes Inmunológicos , Animales , Anticuerpos Antihelmínticos , Calor , Ratones , Schistosoma mansoni/inmunología , Esquistosomiasis mansoni/prevención & control , Células TH1/inmunología
20.
PLoS Negl Trop Dis ; 15(6): e0009554, 2021 06.
Artículo en Inglés | MEDLINE | ID: mdl-34161342

RESUMEN

Schistosomiasis is second only to malaria as the most devastating parasitic disease in the world. It is caused by the helminths Schistosoma mansoni (S. mansoni), S. haematobium, or S. japonicum. Typically, patients with schistosomiasis suffer from symptoms of liver fibrosis and hepatosplenomegaly. Currently, patients were treated with praziquantel. Although praziquantel effectively kills the worm, it cannot prevent re-infection or resolve liver fibrosis. Also, current treatment options are not ample to completely cure liver fibrosis and splenic damages. Moreover, resistance of praziquantel has been reported in vivo and in vitro studies. Therefore, finding new effective treatment agents is urgently needed. Schisandrin B (Sch B) of Schisandra chinensis has been shown to protect against different liver injuries including fatty liver disease, hepatotoxicity, fibrosis, and hepatoma. We herein investigate the potential of using Sch B to treat S. mansoni-induced liver fibrosis. Results from the present study demonstrate that Sch B is beneficial in treating S. mansoni-induced liver fibrosis and splenic damages, through inhibition of inflammasome activation and apoptosis; and aside from that regulates host immune responses. Besides, Sch B treatment damages male adult worm in the mice, consequently helps to reduce egg production and lessen the parasite burden.


Asunto(s)
Antiinflamatorios/farmacología , Lignanos/farmacología , Cirrosis Hepática/tratamiento farmacológico , Compuestos Policíclicos/farmacología , Esquistosomiasis mansoni/tratamiento farmacológico , Animales , Apoptosis/efectos de los fármacos , Ciclooctanos/farmacología , Inflamasomas/efectos de los fármacos , Cirrosis Hepática/parasitología , Masculino , Ratones , Ratones Endogámicos BALB C , Células RAW 264.7 , Schistosoma mansoni/efectos de los fármacos , Bazo/efectos de los fármacos , Bazo/parasitología
SELECCIÓN DE REFERENCIAS
DETALLE DE LA BÚSQUEDA