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EPIREGULIN creates a developmental niche for spatially organized human intestinal enteroids

JCI insight

2023 Feb 23

Childs, CJ;Holloway, EM;Sweet, CW;Tsai, YH;Wu, A;Vallie, A;Eiken, MK;Capeling, MM;Zwick, RK;Palikuqi, B;Trentesaux, C;Wu, JH;Pellon-Cardenas, O;Zhang, CJ;Glass, IA;Loebel, C;Yu, Q;Camp, JG;Sexton, JZ;Klein, OD;Verzi, MP;Spence, JR;
PMID: 36821371 | DOI: 10.1172/jci.insight.165566

Epithelial organoids derived from intestinal tissue, called 'enteroids', recapitulate many aspects of the organ in vitro, and can be used for biological discovery, personalized medicine, and drug development. Here, we interrogated the cell signaling environment within the developing human intestine to identify niche cues that may be important for epithelial development and homeostasis. We identify an EGF family member, EPIREGULIN (EREG), which is robustly expressed in the developing human crypt. Enteroids generated from the developing human intestine grown in standard culture conditions, which contain EGF, are dominated by stem and progenitor cells, feature little differentiation and no spatial organization. Our results demonstrate that EREG can replace EGF in vitro, and EREG leads to spatially resolved enteroids that feature budded and proliferative crypt domains and a differentiated villus-like central lumen. Multiomic (transcriptome plus epigenome) profiling of native crypts, EGF-grown and EREG-grown enteroids show that EGF-enteroids have an altered chromatin landscape that is dependent on EGF concentration, downregulate the master intestinal transcription factor CDX2, and ectopically express stomach genes, a phenomenon that is reversible. This is in contrast to EREG-grown enteroids, which remain intestine-like in culture. Thus, EREG creates a homeostatic intestinal niche in vitro, enabling interrogation of stem cell function, cellular differentiation, and disease modeling.
Successful lung transplantation using an allograft from a COVID-19-recovered donor: a potential role for subgenomic RNA to guide organ utilization

American Journal of Transplantation

2022 Jan 01

Saharia, KK;Ramelli, SC;Stein, SR;Roder, AE;
| DOI: 10.1016/j.ajt.2022.09.001

Although the risk of SARS-CoV-2 transmission through lung transplantation from acutely infected donors is high, the risks of virus transmission and long-term lung allograft outcomes are not as well described when using pulmonary organs from COVID-19-recovered donors. We describe successful lung transplantation for a COVID-19-related lung injury using lungs from a COVID-19-recovered donor who was retrospectively found to have detectable genomic SARS-CoV-2 RNA in the lung tissue by multiple highly sensitive assays. However, SARS-CoV-2 subgenomic RNA (sgRNA), a marker of viral replication, was not detectable in the donor respiratory tissues. One year after lung transplantation, the recipient has a good functional status, walking 1 mile several times per week without the need for supplemental oxygen and without any evidence of donor-derived SARS-CoV-2 transmission. Our findings highlight the limitations of current clinical laboratory diagnostic assays in detecting the persistence of SARS-CoV-2 RNA in the lung tissue. The persistence of SARS-CoV-2 RNA in the donor tissue did not appear to represent active viral replication via sgRNA testing and, most importantly, did not negatively impact the allograft outcome in the first year after lung transplantation. sgRNA is easily performed and may be a useful assay for assessing viral infectivity in organs from donors with a recent infection.
Modification of Diet to Reduce the Stemness and Tumorigenicity of Murine and Human Intestinal Cells

Molecular nutrition & food research

2022 Oct 01

May, S;Greenow, KR;Higgins, AT;Derrick, AV;Taylor, E;Pan, P;Konstantinou, M;Nixon, C;Wooley, TE;Sansom, OJ;Wang, LS;Parry, L;
PMID: 36045438 | DOI: 10.1002/mnfr.202200234

Black raspberries (BRBs) have colorectal cancer (CRC) chemo-preventative effects. As CRC originates from an intestinal stem cell (ISC) this study has investigated the impact of BRBs on normal and mutant ISCs.Mice with an inducible Apcfl mutation in either the ISC (Lgr5CreERT2 ) or intestinal crypt (AhCre/VillinCreERT2 ) are fed a control or 10% BRB-supplemented diet. This study uses immunohistochemistry, gene expression analysis, and organoid culture to evaluate the effect of BRBs on intestinal homeostasis. RNAscope is performed for ISC markers on CRC adjacent normal colonic tissue pre and post BRB intervention from patients. 10% BRB diet has no overt effect on murine intestinal homeostasis, despite a reduced stem cell number. Following Apc ISC deletion, BRB diet extends lifespan and reduces tumor area. In the AhCre model, BRB diet attenuates the "crypt-progenitor" phenotype and reduces ISC marker gene expression. In ex vivo culture BRBs reduce the self-renewal capacity of murine and human Apc deficient organoids. Finally, the study observes a reduction in ISC marker gene expression in adjacent normal crypts following introduction of BRBs to the human bowel.BRBs play a role in CRC chemoprevention by protectively regulating the ISC compartment and further supports the use of BRBs in CRC prevention.
Pulmonary stromal expansion and intra-alveolar coagulation are primary causes of COVID-19 death

Heliyon

2021 May 01

Szekely, L;Bozoky, B;Bendek, M;Ostad, M;Lavignasse, P;Haag, L;Wu, J;Jing, X;Gupta, S;Saccon, E;Sönnerborg, A;Cao, Y;Björnstedt, M;Szakos, A;
PMID: 34056141 | DOI: 10.1016/j.heliyon.2021.e07134

Most COVID-19 victims are old and die from unrelated causes. Here we present twelve complete autopsies, including two rapid autopsies of young patients where the cause of death was COVID-19 ARDS. The main virus induced pathology was in the lung parenchyma and not in the airways. Most coagulation events occurred in the intra-alveolar and not in the intra-vascular space and the few thrombi were mainly composed of aggregated thrombocytes. The dominant inflammatory response was the massive accumulation of CD163 + macrophages and the disappearance of T killer, NK and B-cells. The virus was replicating in the pneumocytes and macrophages but not in bronchial epithelium, endothelium, pericytes or stromal cells. The lung consolidations were produced by a massive regenerative response, stromal and epithelial proliferation and neovascularization. We suggest that thrombocyte aggregation inhibition, angiogenesis inhibition and general proliferation inhibition may have a roll in the treatment of advanced COVID-19 ARDS.
In situ validation of an intestinal stem cell signature in colorectal cancer. 

Gut, 62(7), 1012–1023.

Ziskin JL, Dunlap D, Yaylaoglu M, Fodor IK, Forrest WF, Patel R, Ge N, Hutchins GG, Pine JK, Quirke P, Koeppen H, Jubb AM (2013).
PMID: 22637696 | DOI: 10.1136/gutjnl-2011-301195.

OBJECTIVE: Wnt/Tcf, Lgr5, Ascl2 and/or Bmi1 signalling is believed to define the mouse intestinal stem cell niche(s) from which adenomas arise. The aim of this study was to determine the relevance of these putative intestinal stem cell markers to human colorectal cancer. DESIGN: 19 putative intestinal stem cell markers, including Ascl2 and Lgr5, were identified from published data and an evaluation of a human colorectal gene expression database. Associations between these genes were assessed by isotopic in situ hybridisation (ISH) in 57 colorectal adenocarcinomas. Multiplex fluorescent ISH and chromogenic non-isotopic ISH were performed to confirm expression patterns. The prognostic significance of Lgr5 was assessed in 891 colorectal adenocarcinomas. RESULTS: Ascl2 and Lgr5 were expressed in 85% and 74% of cancers respectively, and expression was positively correlated (p=0.003). Expression of Bmi1 was observed in 47% of cancers but was very weak in 98% of cases with expression. Both Ascl2 and/or Lgr5 were positively correlated with the majority of genes in the signature but neither was correlated with Cdk6, Gpx2, Olfm4 or Tnfrsf19. Lgr5 did not have prognostic significance. CONCLUSION: These data suggest that 74-85% of colorectal cancers express a Lgr5/Ascl2 associated signature and support the hypothesis that they derive from Lgr5(+)/Ascl2(+) crypt stem cells, not Bmi1(+) stem cells. However, Olfm4 was not found to be a useful marker of Lgr5(+) cells in normal colon or tumours. In this large series, Lgr5 expression is not associated with increased tumour aggressiveness, as might be expected from a cancer stem cell marker.
COVID-19 induces neuroinflammation and suppresses peroxisomes in the brain

Annals of neurology

2023 May 15

Roczkowsky, A;Limonta, D;Fernandes, JP;Branton, WG;Clarke, M;Hlavay, B;Noyce, RS;Joseph, JT;Ogando, NS;Das, SK;Elaish, M;Arbour, N;Evans, DH;Langdon, K;Hobman, TC;Power, C;
PMID: 37190821 | DOI: 10.1002/ana.26679

Peroxisome injury occurs in the central nervous system (CNS) during multiple virus infections that result in neurological disabilities. We investigated host neuroimmune responses and peroxisome biogenesis factors during SARS-CoV-2 infection using a multiplatform strategy.Brain tissues from COVID-19 (n=12) and other disease control (ODC) (n=12) patients, as well as primary human neural cells and Syrian hamsters, infected with a clinical variant of SARS-CoV-2, were investigated by ddPCR, RT-qPCR and immunodetection methods.SARS-CoV-2 RNA was detected in the CNS of four patients with COVID-19 with viral protein (NSP3 and spike) immunodetection in the brainstem. Olfactory bulb, brainstem, and cerebrum from patients with COVID-19 showed induction of pro-inflammatory transcripts (IL8, IL18, CXCL10, NOD2) and cytokines (GM-CSF and IL-18) compared to CNS tissues from ODC patients (p<0.05). Peroxisome biogenesis factor transcripts (PEX3, PEX5L, PEX11β and PEX14) and proteins (PEX3, PEX14, PMP70) were suppressed in the CNS of COVID-19 patients compared to ODCs (p<0.05). SARS-CoV-2 infection of hamsters revealed viral RNA detection in the olfactory bulb at days 4 and 7 post-infection while inflammatory gene expression was upregulated in the cerebrum of infected animals by day 14 post-infection (p<0.05). Pex3 transcript levels together with catalase and PMP70 immunoreactivity were suppressed in the cerebrum of SARS-CoV-2 infected animals (p<0.05).COVID-19 induced sustained neuroinflammatory responses with peroxisome biogenesis factor suppression despite limited brainstem SARS-CoV-2 neurotropism in humans. These observations offer insights into developing biomarkers and therapies, while also implicating persistent peroxisome dysfunction as a contributor to the neurological post-acute sequelae of COVID-19. This article is protected by
Temporal changes of genes associated with intestinal homeostasis in broiler chickens following a single infection with Eimeria acervulina

Poultry Science

2023 Jan 01

Cloft, S;Miska, K;Jenkins, M;Proszkowiec-Weglarz, M;Kahl, S;Wong, E;
| DOI: 10.1016/j.psj.2023.102537

Infection with the protozoan parasite Eimeria can cause the economically devastating disease coccidiosis, which is characterized by gross tissue damage and inflammation resulting in blunted villi and altered intestinal homeostasis. Male broiler chickens at 21 d of age were given a single challenge with Eimeria acervulina. Temporal changes in intestinal morphology and gene expression were investigated at 0, 3, 5, 7, 10, and 14 d post-infection (dpi). There were increased crypt depths for chickens infected with E. acervulina starting at 3 dpi and continuing to 14 dpi. At 5 and 7 dpi, infected chickens had decreased Mucin2 (Muc2), and Avian beta defensin (AvBD) 6 mRNA at 5 and 7 dpi and decreased AvBD10 mRNA at 7 dpi compared to uninfected chickens. Liver-enriched antimicrobial peptide 2 (LEAP2) mRNA was decreased at 3, 5, 7, and 14 dpi compared to uninfected chickens. After 7 dpi, there was increased Collagen 3a1 and Notch 1 mRNA compared to uninfected chickens. Marker of proliferation Ki67 mRNA was increased in infected chickens from 3 to 10 dpi. In addition, the presence of E. acervulina was visualized by in situ hybridization (ISH) with an E. acervulina sporozoite surface antigen (Ea-SAG) probe. In E. acervulina infected chickens, Ea-SAG mRNA was only detectable on 5 and 7 dpi by both ISH and qPCR. To further investigate the site of E. acervulina infection, Ea-SAG and Muc2 probes were examined on serial sections. The Muc2 ISH signal was decreased in regions where the Ea-SAG ISH signal was present, suggesting that the decrease in Muc2 by qPCR may be caused by the loss of Muc2 in the localized regions where the E. acervulina had invaded the tissue. Eimeria acervulina appears to manipulate host cells by decreasing their defensive capabilities and thereby allows the infection to propagate freely. Following infection, the intestinal cells upregulate genes that may support regeneration of damaged intestinal tissue.
Transmitted Fetal Immune Response in Cases of SARS-CoV-2 Infections during Pregnancy

Diagnostics

2022 Jan 19

González-Mesa, E;García-Fuentes, E;Carvia-Pontiasec, R;Lavado-Fernández, A;Cuenca-Marín, C;Suárez-Arana, M;Blasco-Alonso, M;Benítez-Lara, B;Mozas-Benítez, L;González-Cazorla, A;Egeberg-Neverdal, H;Jiménez-López, J;
| DOI: 10.3390/diagnostics12020245

(1) Background: Little is known about the effects of SARS-CoV-2 on the placenta, and whether the maternal inflammatory response is transmitted vertically. This research aims to provide information about the effects of SARS-CoV-2 infection on maternal and fetal immunity. (2) Methods: We have studied placental changes and humoral and cellular immunity in maternal and umbilical cord blood (UCB) samples from a group of pregnant women delivering after the diagnosis of SARS-CoV-2 infection during pregnancy. IgG and IgM SARS-CoV-2 antibodies, Interleukin 1b (IL1b), Interleukin 6 (IL6), and gamma-Interferon (IFN-γ), have been studied in the UCB samples. Lymphocyte subsets were studied according to CD3, CD8, CD4, CD34, and invariant natural Killer T cells (iNKT) markers. We used in situ hybridization techniques for the detection of viral RNA in placentas. (3) Results: During the study period, 79 pregnant women and their corresponding newborns were recruited. The main gestational age at the time of delivery was 39.1 weeks (SD 1.3). We did not find traces of the SARS-CoV-2 virus RNA in any of the analyzed placental samples. Detectable concentrations of IgG anti-SARS-CoV-2 antibodies, IL1b, IL6, and IFN-γ, in UCB were found in all cases, but IgM antibodies anti-ARS-CoV-2 were systematically undetectable. We found significant correlations between fetal CD3+ mononuclear cells and UCB IgG concentrations. We also found significant correlations between UCB IgG concentrations and fetal CD3+/CD4+, as well as CD3+/CD8+ T cells subsets. We also discovered that fetal CD3+/CD8+ cell counts were significantly higher in those cases with placental infarctions. (4) Conclusion: we have not verified the placental transfer of SARS-CoV-2. However, we have discovered that a significant immune response is being transmitted to the fetus in cases of SARS-CoV-2 maternal infection.
The SARS-CoV-2 B.1.1.529 Omicron virus causes attenuated infection and disease in mice and hamsters

Research square

2021 Dec 29

Diamond, M;Halfmann, P;Maemura, T;Iwatsuki-Horimoto, K;Iida, S;Kiso, M;Scheaffer, S;Darling, T;Joshi, A;Loeber, S;Foster, S;Ying, B;Whitener, B;Floyd, K;Ujie, M;Nakajima, N;Ito, M;Wright, R;Uraki, R;Li, R;Sakai, Y;Liu, Y;Larson, D;Osorio, J;Hernandez-Ortiz, J;ÄŒiuoderis, K;Florek, K;Patel, M;Bateman, A;Odle, A;Wong, LY;Wang, Z;Edara, VV;Chong, Z;Thackray, L;Ueki, H;Yamayoshi, S;Imai, M;Perlman, S;Webby, R;Seder, R;Suthar, M;Garcia-Sastre, A;Schotsaert, M;Suzuki, T;Boon, A;Kawaoka, Y;Douek, D;Moliva, J;Sullivan, N;Gagne, M;Ransier, A;Case, J;Jeevan, T;Franks, J;Fabrizio, T;DeBeauchamp, J;Kercher, L;Seiler, P;Singh, G;Warang, P;Gonzalez-Reiche, AS;Sordillo, E;van Bakel, H;Simon, V;
PMID: 34981044 | DOI: 10.21203/rs.3.rs-1211792/v1

Despite the development and deployment of antibody and vaccine countermeasures, rapidly-spreading SARS-CoV-2 variants with mutations at key antigenic sites in the spike protein jeopardize their efficacy. The recent emergence of B.1.1.529, the Omicron variant1,2, which has more than 30 mutations in the spike protein, has raised concerns for escape from protection by vaccines and therapeutic antibodies. A key test for potential countermeasures against B.1.1.529 is their activity in pre-clinical rodent models of respiratory tract disease. Here, using the collaborative network of the SARS-CoV-2 Assessment of Viral Evolution (SAVE) program of the National Institute of Allergy and Infectious Diseases (NIAID), we evaluated the ability of multiple B.1.1.529 Omicron isolates to cause infection and disease in immunocompetent and human ACE2 (hACE2) expressing mice and hamsters. Despite modeling and binding data suggesting that B.1.1.529 spike can bind more avidly to murine ACE2, we observed attenuation of infection in 129, C57BL/6, and BALB/c mice as compared with previous SARS-CoV-2 variants, with limited weight loss and lower viral burden in the upper and lower respiratory tracts. Although K18-hACE2 transgenic mice sustained infection in the lungs, these animals did not lose weight. In wild-type and hACE2 transgenic hamsters, lung infection, clinical disease, and pathology with B.1.1.529 also were milder compared to historical isolates or other SARS-CoV-2 variants of concern. Overall, experiments from multiple independent laboratories of the SAVE/NIAID network with several different B.1.1.529 isolates demonstrate attenuated lung disease in rodents, which parallels preliminary human clinical data.
Factors associated with myocardial SARS-CoV-2 infection, myocarditis, and cardiac inflammation in patients with COVID-19

Modern pathology : an official journal of the United States and Canadian Academy of Pathology, Inc

2021 Mar 17

Bearse, M;Hung, YP;Krauson, AJ;Bonanno, L;Boyraz, B;Harris, CK;Helland, TL;Hilburn, CF;Hutchison, B;Jobbagy, S;Marshall, MS;Shepherd, DJ;Villalba, JA;Delfino, I;Mendez-Pena, J;Chebib, I;Newton-Cheh, C;Stone, JR;
PMID: 33727695 | DOI: 10.1038/s41379-021-00790-1

COVID-19 has been associated with cardiac injury and dysfunction. While both myocardial inflammatory cell infiltration and myocarditis with myocyte injury have been reported in patients with fatal COVID-19, clinical-pathologic correlations remain limited. The objective was to determine the relationships between cardiac pathological changes in patients dying from COVID-19 and cardiac infection by SARS-CoV-2, laboratory measurements, clinical features, and treatments. In a retrospective study, 41 consecutive autopsies of patients with fatal COVID-19 were analyzed for the associations between cardiac inflammation, myocarditis, cardiac infection by SARS-CoV-2, clinical features, laboratory measurements, and treatments. Cardiac infection was assessed by in situ hybridization and NanoString transcriptomic profiling. Cardiac infection by SARS-CoV-2 was present in 30/41 cases: virus+ with myocarditis (n = 4), virus+ without myocarditis (n = 26), and virus- without myocarditis (n = 11). In the cases with cardiac infection, SARS-CoV-2+ cells in the myocardium were rare, with a median density of 1 cell/cm2. Virus+ cases showed higher densities of myocardial CD68+ macrophages and CD3+ lymphocytes, as well as more electrocardiographic changes (23/27 vs 4/10; P = 0.01). Myocarditis was more prevalent with IL-6 blockade than with nonbiologic immunosuppression, primarily glucocorticoids (2/3 vs 0/14; P = 0.02). Overall, SARS-CoV-2 cardiac infection was less prevalent in patients treated with nonbiologic immunosuppression (7/14 vs 21/24; P = 0.02). Myocardial macrophage and lymphocyte densities overall were positively correlated with the duration of symptoms but not with underlying comorbidities. In summary, cardiac infection with SARS-CoV-2 is common among patients dying from COVID-19 but often with only rare infected cells. Cardiac infection by SARS-CoV-2 is associated with more cardiac inflammation and electrocardiographic changes. Nonbiologic immunosuppression is associated with lower incidences of myocarditis and cardiac infection by SARS-CoV-2.
Murine Coronavirus Disease 2019 Lethality Is Characterized by Lymphoid Depletion Associated with Suppressed Antigen-Presenting Cell Functionality

The American journal of pathology

2023 Apr 05

Lee, YJ;Seok, SH;Lee, NY;Choi, HJ;Lee, YW;Chang, HJ;Hwang, JY;On, DI;Noh, HA;Lee, SB;Kwon, HK;Yun, JW;Shin, JS;Seo, JY;Nam, KT;Lee, H;Lee, HY;Park, JW;Seong, JK;
PMID: 37024046 | DOI: 10.1016/j.ajpath.2023.03.008

The disease severity of coronavirus disease 2019 (COVID-19) varies considerably from asymptomatic to serious, with fatal complications associated with dysregulation of innate and adaptive immunity. Lymphoid depletion in lymphoid tissues and lymphocytopenia have both been associated with poor disease outcomes in patients with COVID-19, but the mechanisms involved remain elusive. In this study, human angiotensin-converting enzyme 2 (hACE2) transgenic mouse models susceptible to severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) infection were used to investigate the characteristics and determinants of lethality associated with the lymphoid depletion observed in SARS-CoV-2 infection. The lethality of Wuhan SARS-CoV-2 infection in K18-hACE2 mice was characterized by severe lymphoid depletion and apoptosis in lymphoid tissues related to fatal neuroinvasion. The lymphoid depletion was associated with a decreased number of antigen-presenting cells (APCs) and their suppressed functionality below basal levels. Lymphoid depletion with reduced APC function was a specific feature observed in SARS-CoV-2 infection but not in influenza A infection and had the greatest prognostic value for disease severity in murine COVID-19. Comparison of transgenic mouse models resistant and susceptible to SARS-CoV-2 infection revealed that suppressed APC function could be determined by the hACE2 expression pattern and interferon-related signaling. Thus, we demonstrated that lymphoid depletion associated with suppressed APC function characterizes the lethality of COVID-19 mouse models. Our data also suggest a potential therapeutic approach to prevent the severe progression of COVID-19 by enhancing APC functionality.
Does SARS-CoV-2 infect cardiomyocytes directly? Yes, it does

Medical Research Journal

2021 Sep 07

Ryszewska, A;Niewiadomski, P;
| DOI: 10.5603/mrj.a2021.0038

Introduction: COVID-19 (Coronavirus disease 2019) appeared in Wuhan, China, at the ending of 2019. The SARS-CoV-2 virus which causes the illness has spread all over the world and caused a pandemic. The first target of the virus is the respiratory tract; however, the COVID-19 may present different types of course. It is known that the SARS-CoV-2 affects multiple organs, including the heart. Cardiac manifestations of COVID-19 include myocarditis, myocardial infarction, heart failure, acute coronar... Morey syndrome, arrhythmia. The authors know about the patients who had only cardiovascular complications due to the COVID-19. Several mechanisms of heart injury are considered and so is the direct infection. Aim of the study: The present review aimed to find out if the SARS-CoV-2 may infect the heart directly and in which mechanism. The review is an information collection considering the SARS-CoV-2 impact on the heart. Material and methods: The authors have made research using the PubMed search engine to find studies and case reports considering the cardiovascular implications of COVID-19. The signs and symptoms in patients with cardiac implications were studied. The authors have also checked if studies explaining does the SARS-CoV-2 affects the heart directly were conducted. Results: SARS-CoV-2 brings several cardiovascular signs such as changes in imaging tests and elevation of several laboratory markers. The changes may suggest myocarditis or mimic cardiac infarction. The SARS-CoV-2 may affect cardiomyocytes indirectly by causing hypoxia and cytokine storm. As the heart tissue presents a high level of ACE2 which is the target of the virus, the SARS-CoV may infect cardiomyocytes directly. The hypothesis was confirmed in endomyocardial biopsies, autopsy, and in vitro studies. Conclusions: The SARS-CoV-2 impacts several organs. The heart may be injured indirectly (hypoxia and cytokine storm) and directly (ACE2 present in the heart), which gives consequences in a clinical course. The direct injury was confirmed in a variety of ways. Less

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Description
sense
Example: Hs-LAG3-sense
Standard probes for RNA detection are in antisense. Sense probe is reverse complent to the corresponding antisense probe.
Intron#
Example: Mm-Htt-intron2
Probe targets the indicated intron in the target gene, commonly used for pre-mRNA detection
Pool/Pan
Example: Hs-CD3-pool (Hs-CD3D, Hs-CD3E, Hs-CD3G)
A mixture of multiple probe sets targeting multiple genes or transcripts
No-XSp
Example: Hs-PDGFB-No-XMm
Does not cross detect with the species (Sp)
XSp
Example: Rn-Pde9a-XMm
designed to cross detect with the species (Sp)
O#
Example: Mm-Islr-O1
Alternative design targeting different regions of the same transcript or isoforms
CDS
Example: Hs-SLC31A-CDS
Probe targets the protein-coding sequence only
EnEmProbe targets exons n and m
En-EmProbe targets region from exon n to exon m
Retired Nomenclature
tvn
Example: Hs-LEPR-tv1
Designed to target transcript variant n
ORF
Example: Hs-ACVRL1-ORF
Probe targets open reading frame
UTR
Example: Hs-HTT-UTR-C3
Probe targets the untranslated region (non-protein-coding region) only
5UTR
Example: Hs-GNRHR-5UTR
Probe targets the 5' untranslated region only
3UTR
Example: Rn-Npy1r-3UTR
Probe targets the 3' untranslated region only
Pan
Example: Pool
A mixture of multiple probe sets targeting multiple genes or transcripts

Enabling research, drug development (CDx) and diagnostics

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