Article
Biochemical Research Methods
Samuel Long, Brian Berkemeier
Summary: Sensitive detection of viral nucleic acids is crucial for diagnosis and monitoring of infectious diseases. In this study, a step-by-step procedure was developed to quantitatively recover cell/tissue associated viral DNA and RNA, and quantify them using ultrasensitive PCR assays.
Article
Pathology
Natalie N. Kinloch, Gordon Ritchie, Winnie Dong, Kyle D. Cobarrubias, Hanwei Sudderuddin, Tanya Lawson, Nancy Matic, Julio S. G. Montaner, Victor Leung, Marc G. Romney, Christopher F. Lowe, Chanson J. Brumme, Zabrina L. Brumme
Summary: Quantitative viral load assays have been crucial in understanding viral diseases and could play a significant role in advancing COVID-19 control, but SARS-CoV-2 viral load tests are not widely available yet. Droplet digital RT-PCR is deemed an attractive platform for quantifying SARS-CoV-2 RNA, with the E-Sarbeco primer/probe set being identified as the most efficient for this purpose.
JOURNAL OF MOLECULAR DIAGNOSTICS
(2021)
Article
Microbiology
Tao-feng Lu, Bo Sun, Tai-yong Yu, Yan-jun Wu, Jie Zhou, Shu-guang Wu
Summary: Pig-to-human xenotransplantation is hindered by the risk of cross-species transmission of porcine endogenous retroviruses (PERVs). This study screened and analyzed the presence of PERVs in four miniature pig breeds in China and found that the Guizhou miniature pig (GZ) breed had a lower PERVs copy number, making it a potential ideal organ-source miniature pig breed for pig-to-human xenotransplantation research.
FRONTIERS IN MICROBIOLOGY
(2022)
Article
Cell Biology
Diego Carlos Andrade Pereira, Rafael Goncalves Teixeira-Neto, Valeriana Valadares Lopes, Heber Paulino Pena, Gustavo Fontes Paz, Carlos Henrique Xavier Custodio, Vinicius Silva Belo, Antonio Augusto da Fonseca Junior, Eduardo Sergio da Silva
Summary: In this study, qPCR and ddPCR were used to quantify the parasite load in spleen samples from dogs infected with Leishmania (L.) infantum. The results showed 100% agreement between the two methods. These tools are important for the detection of L. infantum in dogs and humans, and ddPCR, as a new tool, can provide more in-depth information about parasitic loads and the pathogenesis of leishmaniasis.
MOLECULAR AND CELLULAR BIOCHEMISTRY
(2023)
Article
Chemistry, Medicinal
Anna A. Shmidt, Tatiana V. Egorova
Summary: This review summarizes the successes and challenges in quality control of recombinant adeno-associated viral vectors (rAAV). It highlights the importance of titer quantification and impurity detection, as well as the lack of standardization in PCR applications for rAAV characterization.
Article
Chemistry, Multidisciplinary
Reza Nouri, Yuqian Jiang, Anthony J. Politza, Tianyi Liu, Wallace H. Greene, Yusheng Zhu, Jonathan J. Nunez, Xiaojun Lian, Weihua Guan
Summary: This study reported a new digital CRISPR-Cas13 assay (dCRISPR) using automated membrane-based partitioning to achieve absolute quantification of HIV-1 viral RNAs. The method does not require amplification and can rapidly quantify RNA samples over a wide range in a short period of time.
Article
Microbiology
Paloma Troyano-Hernaez, Pedro Herrador, Francisco Gea, Beatriz Romero-Hernandez, Gabriel Reina, Agustin Albillos, Juan Carlos Galan, Africa Holguin
Summary: The use of dried blood and plasma samples is an effective alternative for hepatitis C virus diagnosis and quantification. These samples show high sensitivity and specificity for up to 3 months of storage, with dried plasma samples being more reliable for shorter storage times. Dried blood samples can also be used for HCV core antigen detection, with increased sensitivity when adjusting cut-off values.
MICROBIOLOGY SPECTRUM
(2023)
Article
Microbiology
Paloma Troyano-Hernaez, Pedro Herrador, Francisco Gea, Beatriz Romero-Hernandez, Gabriel Reina, Agustin Albillos, Juan Carlos Galan, Africa Holguin
Summary: This study evaluated the performance of dried blood and plasma samples in the diagnosis of hepatitis C virus (HCV). The results showed that dried samples had 100% sensitivity and specificity in HCV RNA quantification, and maintained a high correlation for up to 3 months of storage. Additionally, dried samples could be used for HCV core antigen detection and sensitivity could be increased by adjusting cut-off values.
MICROBIOLOGY SPECTRUM
(2023)
Article
Spectroscopy
Fatima Batool, Haq Nawaz, Muhammad Irfan Majeed, Nosheen Rashid, Saba Bashir, Saba Akbar, Muhammad Abubakar, Shamsheer Ahmad, Muhammad Naeem Ashraf, Saqib Ali, Muhammad Kashif, Imran Amin
Summary: Hepatitis B is a liver disorder caused by the hepatitis B virus, and if left untreated, can lead to serious complications. This study utilized SERS to analyze PCR products of HBV-infected patients and healthy individuals, identifying specific spectral markers for HBV infection. Models were developed for classification and prediction of viral loads, demonstrating the potential of SERS in HBV research.
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
(2021)
Article
Virology
Ali M. Auzin, Serena Slavenburg, Cas Peters, Greet Boland, Janette Rahamat-Langendoen, Willem J. G. Melchers, Rob Schuurman
Summary: High correlation was observed between the Roche Cobas HBV Viral Load tests and the Xpert HBV Viral Load Assay, enabling rapid, random access, and accurate HBV VL assessment. Results demonstrated a mean difference of -0.107 log and a standard deviation of 0.271 log, with only six samples exceeding a 0.5 log difference between the two assays.
JOURNAL OF MEDICAL VIROLOGY
(2021)
Article
Microbiology
Cathinka Halle Julin, Anna Hayman Robertson, Olav Hungnes, Gro Tunheim, Terese Bekkevold, Ida Laake, Idunn Forland Aune, Marit Fodnes Killengreen, Torunn Ramsem Strand, Rikard Rykkvin, Dagny Haug Dorenberg, Kathrine Stene-Johansen, Einar Sverre Berg, Johanna Eva Bodin, Fredrik Oftung, Anneke Steens, Lisbeth Meyer Naess
Summary: The study revealed higher secondary attack rate for the Alpha variant, with older household contacts and contacts of primary cases with loss of taste/smell being more susceptible to infection. Children had lower viral loads and were often asymptomatic, while sleeping separately from the primary case reduced transmission risk.
Article
Biochemical Research Methods
L. A. Pereira, B. A. Lapinscki, M. C. Debur, J. S. Santos, R. R. Petterle, M. B. Nogueira, L. R. R. Vidal, S. M. De Almeida, S. M. Raboni
Summary: This study aimed to develop and standardize a universal absolute quantification for influenza A by reverse transcription-quantitative PCR (RT-qPCR), and identified some predictors associated with increased viral load, such as influenza subtype, gender, and asthma.
JOURNAL OF VIROLOGICAL METHODS
(2022)
Article
Immunology
Rena C. Patel, Patrick Oyaro, Katherine K. Thomas, Garoma Wakjira Basha, James Wagude, Irene Mukui, Evelyn Brown, Shukri A. Hassan, Eunice Kinywa, Fredrick Oluoch, Francesca Odhiambo, Boaz Oyaro, Leonard Kingwara, Enericah Karauki, Nashon Yongo, Lindah Otieno, Grace C. John-Stewart, Lisa L. Abuogi
Summary: This study investigated the impact of point-of-care viral load and targeted drug resistance mutation testing on viral suppression among pregnant and postpartum women living with HIV. The results showed that although the combined strategy significantly reduced turnaround time, it did not increase viral suppression rates, which were already quite high. Further research is needed to optimize sustained viral suppression among this population.
JOURNAL OF THE INTERNATIONAL AIDS SOCIETY
(2023)
Article
Biochemical Research Methods
C. Berengua, E. Miro, C. Gutierrez, M. Sanchez, A. Mulero, P. Ramos, M. del Cuerpo, A. Torrego, I. Garcia-Cadenas, V. Pajares, F. Navarro, R. Martino, N. Rabella
Summary: The purpose of this study was to compare the detection of HCMV in BAL fluid by viral culture and qPCR, and to establish a viral load threshold for identifying cases of pneumonitis. The results showed that 81.25% of the BAL samples had concordant results. Using a cut-off value of 1258 IU/mL of HCMV in BAL, pneumonia can be diagnosed with a sensitivity of 76% and a specificity of 100%.
JOURNAL OF VIROLOGICAL METHODS
(2023)
Article
Infectious Diseases
Ellen Vancutsem, Florence Crombe, Oriane Soetens, Magali Wautier, Corinna Dordelmann, Denis Pierard, Ingrid Wybo, Thomas Demuyser
Summary: Quantification of EBV DNA is crucial in transplantation settings for post-transplantation diagnosis. This study evaluated the performance of the AltoStar (R) EBV PCR Kit 1.5 on whole blood samples and found it to be reliable and accurate, with good sensitivity and linear range for EBV viral load determination.
DIAGNOSTIC MICROBIOLOGY AND INFECTIOUS DISEASE
(2024)
Article
Chemistry, Multidisciplinary
Qian Mao, Lei Yang, Xiumei Geng, Liao Chen, Bedanga Sapkota, Huijuan Zhao, Hongli Zhu
ADVANCED MATERIALS INTERFACES
(2017)
Article
Chemistry, Physical
Shuze Zhu, Xiumei Geng, Yang Han, Mourad Benamara, Liao Chen, Jingxiao Li, Ismail Bilgin, Hongli Zhu
NPJ COMPUTATIONAL MATERIALS
(2017)
Article
Chemistry, Physical
Xinyi Jin, Liao Chen, Yujing Liu, Tao Ye, Chong Hu, Jie Ren, Hongzheng Chen, Hanying Li
JOURNAL OF PHYSICAL CHEMISTRY C
(2019)
Article
Chemistry, Physical
Sebastian Sensale, Ceming Wang, Hsueh-Chia Chang
JOURNAL OF CHEMICAL PHYSICS
(2020)
Article
Multidisciplinary Sciences
Ceming Wang, Sebastian Sensale, Zehao Pan, Satyajyoti Senapati, Hsueh-Chia Chang
Summary: By utilizing the electric field of solid-state nanopores, the translocation time of short single-stranded DNA molecules can be prolonged, leading to improved recognition accuracy of their double-stranded duplexes. Wang et al. successfully slowed down and controlled DNA translocation speed by 5 orders of magnitude by generating a leakage field at the nanopore tip.
NATURE COMMUNICATIONS
(2021)
Article
Multidisciplinary Sciences
Sonu Kumar, Nalin Maniya, Ceming Wang, Satyajyoti Senapati, Hsueh-Chia Chang
Summary: This study proposes using a highly atheroprotective subset of HDL (PON1-HDL) as a biomarker for cardiovascular risk assessment. To overcome the complexity caused by interference from HDL-associated substances in existing methods, the researchers developed a new sensor platform (NGEMS) to quantitate PON1-HDL in plasma quickly and accurately within 60 minutes. Experimental results demonstrate the high accuracy of PON1-HDL in diagnosing cardiovascular diseases.
NATURE COMMUNICATIONS
(2023)
Article
Biology
Chenguang Zhang, Xiaoye Huo, Yini Zhu, James N. N. Higginbotham, Zheng Cao, Xin Lu, Jeffrey L. L. Franklin, Kasey C. C. Vickers, Robert J. J. Coffey, Satyajyoti Senapati, Ceming Wang, Hsueh-Chia Chang
Summary: Superparamagnetic nanobeads offer several advantages for immunocapture of nanocarriers in a bioassay, but their pull-down is difficult due to their superparamagnetic feature. This study presents a new method using an electrodeposited track-etched membrane to create a nano-edge structure that significantly enhances the trapping force of nanobeads. The resulting magnetic nanoporous membrane allows for high-throughput filtration and high capture rates of nanobeads.
COMMUNICATIONS BIOLOGY
(2022)
Article
Biochemical Research Methods
Chenguang Zhang, Gongchen Sun, Satyajyoti Senapati, Hsueh-Chia Chang
Article
Biology
Zeinab Ramshani, Chenguang Zhang, Katherine Richards, Lulu Chen, Geyang Xu, Bangyan L. Stiles, Reginald Hill, Satyajyoti Senapati, David B. Go, Hsueh-Chia Chang
COMMUNICATIONS BIOLOGY
(2019)
Article
Chemistry, Physical
Liao Chen, Hongli Zhu
Meeting Abstract
Chemistry, Multidisciplinary
Li Jiao, Liao Chen, Ming Su, Hongqi Dai
ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY
(2017)
Article
Chemistry, Multidisciplinary
Tao Ye, Xin-Yi Jin, Liao Chen, Chong Hu, Jie Ren, Yu-Jing Liu, Gang Wu, Lu-Jian Chen, Hong-Zheng Chen, Han-Ying Li
CHINESE CHEMICAL LETTERS
(2017)