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Probes for INS

ACD can configure probes for the various manual and automated assays for INS for RNAscope Assay, or for Basescope Assay compatible for your species of interest.

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Porcine reproductive and respiratory syndrome virus infection upregulates negative immune regulators and T-cell exhaustion markers

Journal of virology

2021 Aug 11

Chaudhari, J;Liew, CS;Riethoven, JM;Sillman, S;Vu, HLX;
PMID: 34379512 | DOI: 10.1128/JVI.01052-21

Porcine alveolar macrophage (PAM) is one of the primary cellular targets for PRRSV, but less than 2% of PAMs are infected with the virus during the acute stage of infection. To comparatively analyze the host transcriptional response between PRRSV-infected PAMs and bystanders PAMs that remained uninfected but were exposed to the inflammatory milieu of an infected lung, pigs were infected with a PRRSV strain expressing green fluorescent protein (PRRSV-GFP) and GFP+ (PRRSV infected) and GFP- (bystander) cells were sorted for RNA-sequencing (RNA-seq). Approximately 4.2% of RNA reads from GFP+ and 0.06% reads from GFP- PAMs mapped to the PRRSV genome, indicating that PRRSV-infected PAMs were effectively separated from bystander PAMs. Further analysis revealed that inflammatory cytokines, interferon-stimulated genes, and antiviral genes were highly upregulated in GFP+ as compared to GFP- PAMs. Importantly, negative immune regulators including NF-κB inhibitors (NFKBIA, NFKBID, NFKBIZ, and TNFAIP3), and T-cell exhaustion markers (PD-L1, PD-L2, IL10, IDO1, and TGFB2) were highly upregulated in GFP+ cells as compared to GFP- cells. By using in situ hybridization assay, RNA transcripts of TNF and NF-κB inhibitors were detected in PRRSV-infected PAMs cultured ex vivo and lung sections of PRRSV-infected pigs during the acute stage of infection. Collectively, the results suggest that PRRSV infection upregulates expression of negative immune regulators and T-cell exhaustion markers in PAMs to modulate the host immune response. Our findings provide further insight into PRRSV immunopathogenesis. Importance PRRSV is widespread in many swine producing countries, causing substantial economic loses to the swine industry. PAM is considered the primary target for PRRSV replication in pigs. However, less than 2% of PAM from an acutely infected pigs are infected with the virus. In the present study, we utilized a PRRSV-GFP strain to infect pigs and sorted infected- and bystander- PAMs from the pigs during the acute stage of infection for transcriptome analysis. PRRSV infected PAMs showed a distinctive gene expression profile and contained many uniquely activated pathways compared to bystander PAMs. Interestingly, upregulated expression of and NF-κB signaling inhibitors and T-cell exhaustion molecules were observed in PRRSV-infected PAMs. Our findings provide additional knowledge on the mechanisms that PRRSV employs to modulate the host immune system.
Calcifying nested stromal-epithelial tumor: a clinicopathologic and molecular genetic study of eight cases highlighting metastatic potential and recurrent CTNNB1 and TERT promoter alterations

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

2021 May 16

Papke, DJ;Dong, F;Zhang, X;Kozielski, R;Basturk, O;Fletcher, CDM;Zhao, L;
PMID: 33994539 | DOI: 10.1038/s41379-021-00822-w

Calcifying nested stromal-epithelial tumor (CNSET) is a rare hepatic tumor that occurs in children and young adults. With <40 cases in the literature, the mechanism for tumorigenesis and the biological behavior of CNSET remain uncertain. Here, we studied the clinicopathologic and molecular genetic features of eight CNSETs. Six patients (75%) were female, and the median age at presentation was 22.5 years (range 14-34 years). The median tumor size was 14 cm (range 2.7-18 cm). All tumors had fibrous stroma that contained organoid nests of epithelioid to spindled tumor cells with moderate amounts of palely eosinophilic cytoplasm and ovoid, vesicular nuclei. Five tumors showed calcifications, and one showed lymphovascular invasion. Necrosis was absent in all. Immunohistochemistry demonstrated nuclear β-catenin expression in five of five tested tumors and focal to diffuse nuclear WT-1 positivity in five of seven. Hepatocellular markers (HepPar-1, arginase-1, and albumin in situ hybridization) and neuroendocrine markers (synaptophysin, chromogranin, and INSM1) were uniformly negative. Next-generation sequencing demonstrated CTNNB1 alterations in all seven sequenced tumors. Sanger sequencing demonstrated TERT promoter mutations in all six sequenced tumors. Clinical follow-up was available for seven patients (median duration 4.4 years; range 1.2-6.2 years): four (57%) developed metastatic disease; all four developed lung metastases; and two also had abdominal metastases. All four patients with metastatic disease also had persistent or recurrent liver tumors. Three patients with metastases were alive with disease at the most recent follow-up and one died of disease. The other three patients with available follow-up did not develop metastasis or recurrence. One tumor treated with neoadjuvant chemotherapy showed no response, and another showed 90% tumor fibrosis; the latter patient remained disease-free at 6.2 years of follow-up. Our series demonstrates the presence of TERT promoter mutations and CTNNB1 alterations in all sequenced tumors and suggests that CNSET might perhaps be more aggressive than previously reported.
Single molecule RNA in situ detection in clinical FFPE tissue sections by vsmCISH

RNA (New York, N.Y.)

2023 Feb 22

Jiang, M;Wei, K;Li, M;Lin, C;Ke, R;
PMID: 36813533 | DOI: 10.1261/rna.079482.122

Although RNA plays a vital role in the process of gene expression, it is less used as an in situ biomarker for clinical diagnostics compared to DNA and protein. This is mainly due to technical challenges caused by the low expression level and easy degradation of RNA molecules themselves. To tackle this issue, methods that are sensitive and specific are needed. Here we present an RNA single molecule chromogenic in situ hybridization assay based on DNA probe proximity ligation and rolling circle amplification. When the DNA probes hybridize into close proximity on the RNA molecules, they form V shape structure and mediate the circularization of circle probes. Thus, our method was termed vsmCISH. We not only successfully applied our method to assess HER2 RNA mRNA expression status in invasive breast cancer tissue, but also to investigate the utility of albumin mRNA ISH for differentiating primary from metastatic liver cancer. The promising results on clinical samples indicates the great potential of our method to be applied in the diagnosis of disease using RNA biomarkers.
Viral replication site distribution for rabbit hemorrhagic disease virus 2 in formalin-fixed, paraffin-embedded tissues via in situ hybridization

Journal of veterinary diagnostic investigation : official publication of the American Association of Veterinary Laboratory Diagnosticians, Inc

2022 Nov 01

O'Toole, AD;Zhang, J;Williams, LBA;Brown, CC;
PMID: 36171733 | DOI: 10.1177/10406387221126999

We made 2 Z-based in situ hybridization (ISH) probes for the detection of rabbit hemorrhagic disease virus 2 (RHDV2; Lagovirus GI.2) nucleic acid in formalin-fixed, paraffin-embedded tissues from European rabbits (Oryctolagus cuniculus) that had died during an outbreak of RHD in Washington, USA. One probe system was made for detection of negative-sense RNA (i.e., the replicative intermediate RNA for the virus), and the other probe system was constructed for detection of genomic and mRNA of the virus (viral mRNA). Tissue sets were tested separately, and the viral mRNA probe system highlighted much broader tissue distribution than that of the replicative intermediate RNA probe system. The latter was limited to liver, lung, kidney, spleen, myocardium, and occasional endothelial staining, whereas signal for the viral mRNA was seen in many more tissues. The difference in distribution suggests that innate phagocytic activity of various cell types may cause overestimation of viral replication sites when utilizing ISH of single-stranded, positive-sense viruses.
Targeted RNA editing in brainstem alleviates respiratory dysfunction in a mouse model of Rett syndrome

Proceedings of the National Academy of Sciences of the United States of America

2022 Aug 16

Sinnamon, JR;Jacobson, ME;Yung, JF;Fisk, JR;Jeng, S;McWeeney, SK;Parmelee, LK;Chan, CN;Yee, SP;Mandel, G;
PMID: 35939700 | DOI: 10.1073/pnas.2206053119

Rett syndrome is a neurological disease due to loss-of-function mutations in the transcription factor, Methyl CpG binding protein 2 (MECP2). Because overexpression of endogenous MECP2 also causes disease, we have exploited a targeted RNA-editing approach to repair patient mutations where levels of MECP2 protein will never exceed endogenous levels. Here, we have constructed adeno-associated viruses coexpressing a bioengineered wild-type ADAR2 catalytic domain (Editasewt) and either Mecp2-targeting or nontargeting gfp RNA guides. The viruses are introduced systemically into male mice containing a guanosine to adenosine mutation that eliminates MeCP2 protein and causes classic Rett syndrome in humans. We find that in the mutant mice injected with the Mecp2-targeting virus, the brainstem exhibits the highest RNA-editing frequency compared to other brain regions. The efficiency is sufficient to rescue MeCP2 expression and function in the brainstem of mice expressing the Mecp2-targeting virus. Correspondingly, we find that abnormal Rett-like respiratory patterns are alleviated, and survival is prolonged, compared to mice injected with the control gfp guide virus. The levels of RNA editing among most brain regions corresponds to the distribution of guide RNA rather than Editasewt. Our results provide evidence that a targeted RNA-editing approach can alleviate a hallmark symptom in a mouse model of human disease.
Expanded Histopathology and Tropism of Ebola Virus in the Rhesus Macaque Model: Potential for Sexual Transmission, Altered Adrenomedullary Hormone Production and Early Viral Replication in liver

The American journal of pathology

2021 Oct 06

Liu, DX;Cooper, TK;Perry, DL;Huzella, LM;Hischak, AM;Hart, RJ;Isic, N;Byrum, R;Ragland, D;St Claire, M;Cooper, K;Reeder, R;Logue, J;Jahrling, PB;Holbrook, MR;Bennett, RS;Hensley, LE;
PMID: 34626576 | DOI: 10.1016/j.ajpath.2021.09.009

The pathogenesis of Ebola virus disease (EVD) is still incomplete, although the non-human primate model has been studied for more than 4 decades. To further investigate EVD pathogenesis, a natural history study has been conducted using 27 Chinese-origin rhesus macaques. Of them, 24 macaques were exposed intramuscularly to Kikwit Ebola virus (EBOV) and euthanized at pre-determined timepoints or when end stage clinical disease criteria were met, while 3 other sham-exposed macaques were euthanized at the study day 0. This study demonstrates for the first time that Ebola virus causes uterine cervicitis, vaginitis, posthitis, and medullary adrenalitis. Not only is Ebola virus detected in the interstitial stromal cells of the genital tract, but it is also present in the epididymal and seminal vesicular tubular epithelial cells, ectocervical and vaginal squamous epithelial cells, and seminal fluid. Furthermore, as early as day 3 after exposure, EBOV replicative intermediate RNA was detected in Kupffer cells and hepatocytes. These findings in the nonhuman model provide additional insight into potential sexual transmission, possible disruption of sympathetic hormone production, and early virus replication sites in human EVD patients.
Detection of rabbit hemorrhagic disease virus 2 in formalin-fixed, paraffin-embedded tissues via in situ hybridization

Journal of veterinary diagnostic investigation : official publication of the American Association of Veterinary Laboratory Diagnosticians, Inc

2021 Sep 23

O'Toole, AD;Zhang, J;Williams, LBA;Brown, CC;
PMID: 34554024 | DOI: 10.1177/10406387211047561

Formalin-fixed, paraffin-embedded tissues from European rabbits (Oryctolagus cuniculus) that succumbed to rabbit hemorrhagic disease virus 2 (RHDV2; Lagovirus GI.2) during the 2019 outbreak in Washington, USA, were utilized for in situ hybridization via RNAscope (ACDBio). This detection method was both sensitive and specific, with no staining in tissues from RHDV- (Lagovirus GI.1) and RHDV2-negative rabbits, and only slight background staining of RHDV-positive rabbits; RHDV2-positive tissues had bright-red cytoplasmic staining. Although much of the viral mRNA detection was consistent with previously described antigen detection via immunohistochemistry of the liver, lungs, and spleen, there was also significant glomerular staining in the kidneys, and endothelial staining within blood vessels of almost all organs. We validated the RNAscope technique for detection of RHDV2 mRNA in formalin-fixed, paraffin-embedded tissues, with increased sensitivity from previous techniques, and identified additional affected cell types that may contribute to the understanding of pathogenesis.
An RNA aptamer restores defective bone growth in FGFR3-related skeletal dysplasia in mice

Science translational medicine

2021 May 05

Kimura, T;Bosakova, M;Nonaka, Y;Hruba, E;Yasuda, K;Futakawa, S;Kubota, T;Fafilek, B;Gregor, T;Abraham, SP;Gomolkova, R;Belaskova, S;Pesl, M;Csukasi, F;Duran, I;Fujiwara, M;Kavkova, M;Zikmund, T;Kaiser, J;Buchtova, M;Krakow, D;Nakamura, Y;Ozono, K;Krejci, P;
PMID: 33952673 | DOI: 10.1126/scitranslmed.aba4226

Achondroplasia is the most prevalent genetic form of dwarfism in humans and is caused by activating mutations in FGFR3 tyrosine kinase. The clinical need for a safe and effective inhibitor of FGFR3 is unmet, leaving achondroplasia currently incurable. Here, we evaluated RBM-007, an RNA aptamer previously developed to neutralize the FGFR3 ligand FGF2, for its activity against FGFR3. In cultured rat chondrocytes or mouse embryonal tibia organ culture, RBM-007 rescued the proliferation arrest, degradation of cartilaginous extracellular matrix, premature senescence, and impaired hypertrophic differentiation induced by FGFR3 signaling. In cartilage xenografts derived from induced pluripotent stem cells from individuals with achondroplasia, RBM-007 rescued impaired chondrocyte differentiation and maturation. When delivered by subcutaneous injection, RBM-007 restored defective skeletal growth in a mouse model of achondroplasia. We thus demonstrate a ligand-trap concept of targeting the cartilage FGFR3 and delineate a potential therapeutic approach for achondroplasia and other FGFR3-related skeletal dysplasias.
A role of PIEZO1 in iron metabolism in mice and humans

Cell

2021 Feb 18

Ma, S;Dubin, AE;Zhang, Y;Mousavi, SAR;Wang, Y;Coombs, AM;Loud, M;Andolfo, I;Patapoutian, A;
PMID: 33571427 | DOI: 10.1016/j.cell.2021.01.024

Iron overload causes progressive organ damage and is associated with arthritis, liver damage, and heart failure. Elevated iron levels are present in 1%-5% of individuals; however, iron overload is undermonitored and underdiagnosed. Genetic factors affecting iron homeostasis are emerging. Individuals with hereditary xerocytosis, a rare disorder with gain-of-function (GOF) mutations in mechanosensitive PIEZO1 ion channel, develop age-onset iron overload. We show that constitutive or macrophage expression of a GOF Piezo1 allele in mice disrupts levels of the iron regulator hepcidin and causes iron overload. We further show that PIEZO1 is a key regulator of macrophage phagocytic activity and subsequent erythrocyte turnover. Strikingly, we find that E756del, a mild GOF PIEZO1 allele present in one-third of individuals of African descent, is strongly associated with increased plasma iron. Our study links macrophage mechanotransduction to iron metabolism and identifies a genetic risk factor for increased iron levels in African Americans.
AT2 cell-derived IgA trapped by the extracellular matrix in silica-induced pulmonary fibrosis

International immunopharmacology

2023 Jun 28

Chen, M;Wang, J;Yuan, M;Long, M;Sun, Y;Wang, S;Luo, W;Zhou, Y;Zhang, W;Jiang, W;Chao, J;
PMID: 37390644 | DOI: 10.1016/j.intimp.2023.110545

Pulmonary fibrosis is an interstitial lung disease caused by various factors such as exposure to workplace environmental contaminants, drugs, or X-rays. Epithelial cells are among the driving factors of pulmonary fibrosis. Immunoglobulin A (IgA), traditionally thought to be secreted by B cells, is an important immune factor involved in respiratory mucosal immunity. In the current study, we found that lung epithelial cells are involved in IgA secretion, which, in turn, promotes pulmonary fibrosis. Spatial transcriptomics and single-cell sequencing suggest that Igha transcripts were highly expressed in the fibrotic lesion areas of lungs from silica-treated mice. Reconstruction of B-cell receptor (BCR) sequences revealed a new cluster of AT2-like epithelial cells with a shared BCR and high expression of genes related to IgA production. Furthermore, the secretion of IgA by AT2-like cells was trapped by the extracellular matrix and aggravated pulmonary fibrosis by activating fibroblasts. Targeted blockade of IgA secretion by pulmonary epithelial cells may be a potential strategy for treating pulmonary fibrosis.
MHC class II-restricted antigen presentation is required to prevent dysfunction of cytotoxic T cells by blood-borne myeloids in brain tumors

Cancer cell

2022 Dec 30

Kilian, M;Sheinin, R;Tan, CL;Friedrich, M;Krämer, C;Kaminitz, A;Sanghvi, K;Lindner, K;Chih, YC;Cichon, F;Richter, B;Jung, S;Jähne, K;Ratliff, M;Prins, RM;Etminan, N;von Deimling, A;Wick, W;Madi, A;Bunse, L;Platten, M;
PMID: 36638785 | DOI: 10.1016/j.ccell.2022.12.007

Cancer immunotherapy critically depends on fitness of cytotoxic and helper T cell responses. Dysfunctional cytotoxic T cell states in the tumor microenvironment (TME) are a major cause of resistance to immunotherapy. Intratumoral myeloid cells, particularly blood-borne myeloids (bbm), are key drivers of T cell dysfunction in the TME. We show here that major histocompatibility complex class II (MHCII)-restricted antigen presentation on bbm is essential to control the growth of brain tumors. Loss of MHCII on bbm drives dysfunctional intratumoral tumor-reactive CD8+ T cell states through increased chromatin accessibility and expression of Tox, a critical regulator of T cell exhaustion. Mechanistically, MHCII-dependent activation of CD4+ T cells restricts myeloid-derived osteopontin that triggers a chronic activation of NFAT2 in tumor-reactive CD8+ T cells. In summary, we provide evidence that MHCII-restricted antigen presentation on bbm is a key mechanism to directly maintain functional cytotoxic T cell states in brain tumors.
LncRNA LIMp27 Regulates the DNA Damage Response through p27 in p53-Defective Cancer Cells

Advanced science (Weinheim, Baden-Wurttemberg, Germany)

2023 Jan 13

La, T;Chen, S;Zhao, XH;Zhou, S;Xu, R;Teng, L;Zhang, YY;Ye, K;Xu, L;Guo, T;Jamaluddin, MF;Feng, YC;Tang, HJ;Wang, Y;Xu, Q;Gu, Y;Cao, H;Liu, T;Thorne, RF;Shao, FM;Zhang, XD;Jin, L;
PMID: 36638271 | DOI: 10.1002/advs.202204599

P53 inactivation occurs in about 50% of human cancers, where p53-driven p21 activity is devoid and p27 becomes essential for the establishment of the G1/S checkpoint upon DNA damage. Here, this work shows that the E2F1-responsive lncRNA LIMp27 selectively represses p27 expression and contributes to proliferation, tumorigenicity, and treatment resistance in p53-defective colon adenocarcinoma (COAD) cells. LIMp27 competes with p27 mRNA for binding to cytoplasmically localized hnRNA0, which otherwise stabilizes p27 mRNA leading to cell cycle arrest at the G0/G1 phase. In response to DNA damage, LIMp27 is upregulated in both wild-type and p53-mutant COAD cells, whereas cytoplasmic hnRNPA0 is only increased in p53-mutant COAD cells due to translocation from the nucleus. Moreover, high LIMp27 expression is associated with poor survival of p53-mutant but not wild-type p53 COAD patients. These results uncover an lncRNA mechanism that promotes p53-defective cancer pathogenesis and suggest that LIMp27 may constitute a target for the treatment of such cancers.

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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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