Review
Immunology
Giorgio Santoni, Consuelo Amantini, Matteo Santoni, Federica Maggi, Maria Beatrice Morelli, Angela Santoni
Summary: NK cells play a crucial role in immune protection against viruses and tumors by killing target cells and secreting cytokines. Mechanotransduction, mediated by actin cytoskeleton, regulates NK cell functions such as adhesion, migration, and tissue infiltration. Further research on mechanotransduction may lead to new immunotherapeutic approaches tailored for NK cells.
FRONTIERS IN IMMUNOLOGY
(2021)
Review
Biochemistry & Molecular Biology
Takahiro Uchida, Shuhji Seki, Takashi Oda
Summary: Natural killer T (NKT) cells and NK cells have important roles in antitumor and antimicrobial functions. They are involved in various renal diseases, including acute kidney injury (AKI). NKT cells in mice are activated by specific ligands, cytokines, and bacterial components, leading to AKI. Both renal vascular endothelial cell injury (via perforin-mediated pathway) and tubular epithelial cell injury (via tumor necrosis factor-alpha/Fas ligand pathway) are independently involved in the pathogenesis of AKI. NK cells complement the functions of NKT cells in the development of infection-associated AKI. Human CD56(+) T cells, which are functional counterparts of murine NKT cells, and a subpopulation of CD56(+) NK cells damage intrinsic renal cells in vitro upon activation, possibly through mechanisms similar to those in mice. These cells are also thought to be involved in the acute exacerbation of pre-existing glomerulonephritis triggered by infection in humans, and their roles in sepsis-associated AKI are currently under investigation. In this review, we provide an overview of recent advances in the understanding of the association among infections, NKT and NK cells, and kidney injury, which is much more profound than previously considered. The important role of liver macrophages in the activation of NKT cells is also introduced.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2022)
Review
Immunology
Elena Ockfen, Liza Filali, Diogo Pereira Fernandes, Celine Hoffmann, Clement Thomas
Summary: This review article emphasizes the importance of actin dynamics within the immunological synapse between cytotoxic lymphocytes and cancer cells, presenting emerging evidence that actin dynamics in cancer cells can critically influence the outcome of cytotoxic lymphocyte interactions with cancer cells.
FRONTIERS IN IMMUNOLOGY
(2023)
Article
Allergy
Robert Ose, Benno Weigmann, Detlef Schuppan, Ari Waisman, Joachim Saloga, Iris Bellinghausen
Summary: CD56(+)CD3(+) iNKT cells promote allergen-specific gut and lung inflammation in PBMC-engrafted humanized mice, opening up new possibilities for therapeutic intervention in allergic diseases.
JOURNAL OF ALLERGY AND CLINICAL IMMUNOLOGY
(2021)
Article
Oncology
Rui Zhang, Qingxi Liu, Sa Zhou, Hongpeng He, Mingfeng Zhao, Wenjian Ma
Summary: In this study, a genetically modified bifunctional CAR-NK cell therapy was developed for the treatment of acute myeloid leukemia (AML). The bifunctional CD33/B16 CAR-NK cells showed superior killing efficiency towards AML cells compared to CAR-NK cells targeting CD33 only. In vivo studies also demonstrated effective clearance of leukemic cells and improved survival. These findings suggest a promising CAR-NK approach for AML treatment and potentially other tumors.
Article
Immunology
Yongwei Qin, Liangqiong Chen, Qiuwen Fei, Xiaoyi Shao, Wenxuan Lv, Junling Yang, Feifan Xu, Jiahai Shi
Summary: In this study, CD226 immunoregulation functions were evaluated using peripheral blood from tuberculosis patients and healthy donors. The results showed that a subset of T cells and NK cells expressing CD226 exhibited a distinct phenotype in TB patients. CD226+ subsets produced more IFN-gamma and CD107a than CD226- subsets in tuberculosis patients.
INTERNATIONAL IMMUNOPHARMACOLOGY
(2023)
Article
Cell Biology
Daniel Friedman, Poppy Simmonds, Alexander Hale, Leoma Bere, Nigel W. Hodson, Michael R. H. White, Daniel M. Davis
Summary: NK cells are more effectively stimulated to secrete various antibodies when encountering stiff targets compared to soft targets, which may impact NK cell recognition and response. Varying target stiffness can alter the mechanosensitivity of immune synapses, highlighting soft targets as a blind spot in NK cell recognition.
JOURNAL OF CELL SCIENCE
(2021)
Article
Immunology
Alexandros Karampatzakis, Petr Broz, Camille Rey, Bjorn Onfelt, Gabriela Dos Santos Cruz De Matos, Daniel Rycroft, Ashley Ambrose, Daniel M. Davis
Summary: The afucosylation of CD20 mAb increases NK cell cytotoxicity and IFN gamma secretion, as well as leading to faster killing of target cells and increased efficiency in serial killing by NK cells, due to the loss of CD16 causing disassembly of the immune synapse.
FRONTIERS IN IMMUNOLOGY
(2021)
Article
Oncology
Cecilia Pesini, Sandra Hidalgo, Maykel A. Arias, Llipsy Santiago, Carlota Calvo, Maitane Ocariz-Diez, Dolores Isla, Pilar M. Lanuza, M. Jose Agustin, Eva M. Galvez, Ariel Ramirez-Labrada, Julian Pardo
Summary: This study found that PD-1 is translocated to the cell membrane of NK cells after interaction with tumor cells, leading to reduced anti-tumor activity. This novel finding helps to understand the regulation of PD-1 on NK cell membrane and its functional consequences during the elimination of tumor cells.
Article
Biochemical Research Methods
Sagar N. Agnihotri, Giovanni Stefano Ugolini, Matthew Ryan Sullivan, Yichao Yang, Agustin De Ganzo, Ji Won Lim, Tania Konry
Summary: Most common cellular analysis methods employ a top-down approach, which destroys the cell and prevents correlation between genomics and functional assays. This study presents a bottom-up approach using single-cell tools, allowing functional phenotyping through observing cytotoxicity and probing underlying biology.
Article
Environmental Sciences
Yufan Zhang, Yifan Zhao, Yue Zhai, Jinyi He, Mengke Tang, Yalin Liu, Ye Yao, Peng Xue, Miao He, Qian Li, Yanyi Xu, Weidong Qu, Yubin Zhang
Summary: This study aimed to investigate the impact of cadmium (Cd) on natural killer (NK) cells. It was found that Cd treatment impaired the differentiation of NK progenitors in the bone marrow but activated the JAK3/STAT5 signaling to drive the proliferation of mature NK (mNK) cells. Cd treatment bidirectionally regulated the cytotoxicity of mNK cells to tumor cells through the modulation of Fas expression and granzyme B expression. Similar effects were observed in human mNK cells. This research extends our understanding of the immunotoxicity of Cd.
Article
Immunology
Lea Katharina Picard, Maren Claus, Frank Fasbender, Carsten Watzl
Summary: The engagement of CD56 can activate NK cells and induce degranulation, IFN-gamma secretion, and morphological changes, making CD56 a potential co-activating receptor in NK cells. This effect is dependent on cytokine stimulation and can be impaired by the inhibition of specific pathways. However, the absence of CD56 does not impact the cytotoxic activity of NK cells against tumor target cells.
EUROPEAN JOURNAL OF IMMUNOLOGY
(2022)
Review
Immunology
Natacha Omer, Wayne Nicholls, Bronte Ruegg, Fernando Souza-Fonseca-Guimaraes, Gustavo Rodrigues Rossi
Summary: Osteosarcoma, Ewing sarcoma, and rhabdomyosarcoma are common pediatric sarcomas with conventional therapies showing limited efficacy, calling for innovative treatments like immunotherapy. NK cells have shown cytotoxicity against these sarcomas in vitro, but further research is needed for clinical applications.
FRONTIERS IN IMMUNOLOGY
(2021)
Review
Immunology
Michela Calvi, Clara Di Vito, Alessandro Frigo, Sara Trabanelli, Camilla Jandus, Domenico Mavilio
Summary: This article introduces the classification, origin, and function of innate lymphoid cells (ILCs), and discusses the development process of NK cells and helper ILCs as well as their roles in physiological and pathological conditions.
FRONTIERS IN IMMUNOLOGY
(2022)
Article
Chemistry, Multidisciplinary
Songbo Zhao, Jiazhi Duan, Yalin Lou, Ruyun Gao, Shanshan Yang, Piming Wang, Chunhua Wang, Lin Han, Minghuan Li, Chunhong Ma, Xiaohong Liang, Hong Liu, Yuanhua Sang, Lifen Gao
Summary: A novel immunotherapy approach utilizing NK cells conjugated with magnetic nanoparticles has been developed for treating solid tumors, demonstrating improved tumor targeting and inhibition capabilities through magnetic field guidance.
Article
Genetics & Heredity
Hamdi Mbarek, Geethanjali Devadoss Gandhi, Senthil Selvaraj, Wadha Al-Muftah, Radja Badji, Yasser Al-Sarraj, Chadi Saad, Dima Darwish, Muhammad Alvi, Tasnim Fadl, Heba Yasin, Fatima Alkuwari, Rozaimi Razali, Waleed Aamer, Fatemeh Abbaszadeh, Ikhlak Ahmed, Younes Mokrab, Karsten Suhre, Omar Albagha, Khalid Fakhro, Ramin Badii, Said I. Ismail, Asma Althani
Summary: This study describes insights from Phase 1 of the Qatar Genome Program, where 6047 individuals from Qatar were whole genome sequenced. The results show that due to high consanguinity and founder effects in the Middle Eastern population, rare deleterious variants are more common in the Qatari population, while other variants seem to provide protection against diseases and have shaped the genetic architecture of adaptive phenotypes. These findings are valuable for advancing genetic studies in the Arab and neighboring Middle Eastern populations, as well as improving our understanding of global patterns of human variations, human history, and genetic contributions to health and diseases in diverse populations.
Article
Genetics & Heredity
Juan L. Rodriguez-Flores, Radja Messai-Badji, Amal Robay, Ramzi Temanni, Najeeb Syed, Monika Markovic, Eiman Al-khayat, Fatima Qafoud, Zafar Nawaz, Ramin Badii, Yasser Al-Sarraj, Hamdi Mbarek, Wadha Al-Muftah, Muhammad Alvi, Mahboubeh R. Rostami, Juan Carlos Martinez Cruzado, Jason G. Mezey, Alya Al Shakaki, Joel A. Malek, Matthew B. Greenblatt, Khalid A. Fakhro, Khaled Machaca, Ajayeb Al-Nabet, Nahla Afifi, Andrew Brooks, Said I. Ismail, Asmaa Althani, Ronald G. Crystal
Summary: This study developed a cost-effective genotyping microarray, QChip1, for comprehensive screening of Mendelian disorder risk variants in the Qatari population. The study found that Qatari individuals have specific population-private risk variants for Mendelian disorders, which are not commonly observed in Western populations or the broader Middle Eastern population. This highlights the importance of developing ancestry-specific screening tools for Mendelian disorders.
NPJ GENOMIC MEDICINE
(2022)
Article
Cell Biology
Maryam Aghadi, Ramy Elgendy, Essam M. Abdelalim
Summary: FOXA2 plays a crucial role in the development and function of human hepatocytes, and its loss leads to developmental defects and functional abnormalities. This study provides insights into the mechanisms of FOXA2 in liver cells and offers a valuable model for studying FOXA2-associated liver disorders.
CELL DEATH & DISEASE
(2022)
Article
Cell & Tissue Engineering
Bushra Memon, Ahmed K. Elsayed, Ilham Bettahi, Noor Suleiman, Ihab Younis, Eman Wehedy, Abdul Badi Abou-Samra, Essam M. Abdelalim
Summary: Transcriptomics analysis of IR-iPSCs revealed dysregulated gene networks and biological processes associated with insulin resistance (IR), indicating the inheritance of genetic defects in this population. IR-iPSCs exhibited increased lactate secretion and higher AKT phosphorylation upon insulin stimulation. Additionally, IR-iPSCs showed increased cellular oxidative stress and higher susceptibility to H2O2-induced apoptosis.
STEM CELL RESEARCH & THERAPY
(2022)
Article
Biochemistry & Molecular Biology
Asma A. Elashi, Salman M. Toor, Ilhame Diboun, Yasser Al-Sarraj, Shahrad Taheri, Karsten Suhre, Abdul Badi Abou-Samra, Omar M. E. Albagha
Summary: Maturity-onset diabetes of the young (MODY) is a rare monogenic form of diabetes mellitus. This study estimated the prevalence and genetic spectrum of MODY in the Middle Eastern population of Qatar through whole-genome sequencing, identifying known and potentially novel disease-causing mutations. The study found that MODY accounts for approximately 2.2-3.4% of diabetes patients in Qatar and highlighted the need for further research on the newly identified mutations.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2023)
Article
Biochemistry & Molecular Biology
Zeyaul Islam, Noura Aldous, Sunkyu Choi, Frank Schmidt, Borbala Mifsud, Essam M. Abdelalim, Prasanna R. Kolatkar
Summary: This study demonstrates that the cofactors FAD and PLP interact with Sox9 to induce an increase in pancreatic development markers, revealing the mechanism underlying their involvement in pancreas development.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2022)
Review
Biochemistry & Molecular Biology
Noura Aldous, Abu Saleh Md Moin, Essam M. Abdelalim
Summary: Recent studies have shown that pancreatic beta-cells are heterogeneous in their transcriptional profiles and insulin secretion abilities. Different sub-populations of beta-cells have been identified based on functionality and surface markers. Understanding the heterogeneity of beta-cells and their interactions with other endocrine cells is crucial for developing stem cell-derived therapies for diabetes.
CELLULAR AND MOLECULAR LIFE SCIENCES
(2023)
Letter
Endocrinology & Metabolism
Bushra Memon, Essam M. Abdelalim
Article
Biochemistry & Molecular Biology
Hanan Ehtewish, Areej Mesleh, Georgios Ponirakis, Alberto de la Fuente, Aijaz Parray, Ilham Bensmail, Houari Abdesselem, Marwan Ramadan, Shafi Khan, Mani Chandran, Raheem Ayadathil, Ahmed Elsotouhy, Ahmed Own, Hanadi Al Hamad, Essam M. Abdelalim, Julie Decock, Nehad M. Alajez, Omar Albagha, Paul J. Thornalley, Abdelilah Arredouani, Rayaz A. Malik, Omar M. A. El-Agnaf
Summary: Dementia is a progressive and debilitating neurological disease. Proteomic studies have revealed potential protein biomarkers for dementia. This pilot study used a high-throughput proximity extension immunoassay to quantify proteins in plasma and identified diagnostic biomarkers for dementia with high accuracy. Dysregulation of plasma proteins and correlation with cognitive performance suggest potential mechanisms and pathways in dementia pathogenesis.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2023)
Article
Nutrition & Dietetics
Nagham Nafiz Hendi, Marlene Chakhtoura, Yasser Al-Sarraj, Dania Saleh Basha, Omar Albagha, Ghada El-Hajj Fuleihan, Georges Nemer
Summary: The Middle East region has a high prevalence of vitamin D deficiency, particularly among elderly individuals. Genetic studies on vitamin D have focused mostly on European populations, therefore there is a lack of research on the genetic factors affecting elderly people in the Middle East. In this study, we identified novel genomic loci associated with vitamin D levels in elderly Lebanese individuals and confirmed the replication of numerous variants from a European study. Our findings provide new insights into the genetic mechanisms of vitamin D deficiency in elderly Middle Eastern populations and can aid in the development of personalized approaches for its management.
Article
Cell & Tissue Engineering
Noura Aldous, Ahmed K. Elsayed, Nehad M. Alajez, Essam M. Abdelalim
Summary: Recently, the importance of forkhead box A2 (FOXA2) in pancreatic cell development has been reported. However, the role of miRNAs in regulating pancreatic genes in the absence of FOXA2 expression is not well understood. This study aimed to identify dysregulated miRNAs and their targets in pancreatic progenitors (PPs) derived from induced pluripotent stem cells (iPSCs) with and without FOXA2 expression. The results showed that FOXA2 deficiency led to reduced expression of PP transcription factors and genes involved in pancreatic development and function. Furthermore, miRNA profiling revealed dysregulated miRNAs in FOXA2-deficient PPs, with predicted targets in downregulated genes. Overall, this study provides insights into the regulatory networks controlling pancreatic development and differentiation in the absence of FOXA2 expression.
STEM CELL REVIEWS AND REPORTS
(2023)
Article
Cell & Tissue Engineering
Idil I. Aigha, Essam M. Abdelalim
Summary: The aim of this study was to examine the effect of p53 inhibition on the generation of PDX1(+)/NKX6.1(+) pancreatic progenitor cells and pancreatic beta-cell generation. The results showed that inhibition of p53 increased the number of PDX1(+)/NKX6.1(+) cells and reduced the number of CHGA(+)/NKX6.1(-) cells. Furthermore, the use of a p53 inhibitor during differentiation of pancreatic progenitor cells led to a decrease in the generation of polyhormonal beta-cells.
STEM CELL REVIEWS AND REPORTS
(2023)
Article
Biochemistry & Molecular Biology
Salman M. Toor, Eman K. Aldous, Aijaz Parray, Naveed Akhtar, Yasser Al-Sarraj, Essam M. Abdelalim, Abdelilah Arredouani, Omar El-Agnaf, Paul J. Thornalley, Sajitha V. Pananchikkal, Ghulam Jeelani Pir, Raheem Ayadathil, Ashfaq Shuaib, Nehad M. Alajez, Omar M. E. Albagha
Summary: Transient ischemic attack (TIA) is a temporary neurologic deficit caused by ischemic insult to the brain, spinal cord, or retina. TIA is associated with a high risk of impending acute ischemic stroke (AIS), a condition characterized by focal infarction in the brain, spinal cord, or retina. This study investigated the differences in circulating microRNA profiles between AIS and TIA patients and identified a panel of differentially regulated microRNAs. Furthermore, a multivariate classifier was developed that could potentially be used as a biomarker to distinguish AIS and TIA patients. Understanding the molecular pathways in AIS compared to TIA may have important implications for therapeutic targeting in clinical translation.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2023)
Article
Cell Biology
Reem Ali, Abdallah Alhaj Sulaiman, Bushra Memon, Singdhendubala Pradhan, Mashael Algethami, Mustapha Aouida, Gordon Mckay, Srinivasan Madhusudan, Essam M. Abdelalim, Dindial Ramotar
Summary: This study demonstrates the involvement of glucose transporter GLUT3 in the uptake of arsenite, regulated by peroxiredoxin 1 (PRDX1). GLUT3 expression levels are low in the absence of PRDX1, but increase upon arsenite treatment, leading to elevated glucose uptake. Inhibition or deletion of GLUT3 confers resistance to arsenite, while overexpression sensitizes the cells. GLUT3 interacts with PRDX1 and forms nuclear foci, which redistribute upon arsenite exposure. These findings suggest GLUT3 and PRDX1 as novel targets for arsenite-based cancer therapy.