biology

Senecavirus

Senecavirus is a biology topic covered in the lgStudy science library. This page brings together a partial reference excerpt, illustrations, worked examples, real-world applications and a short study plan, so you can understand Senecavirus rather than just read about it. In short: Senecavirus is a genus of viruses in the order Picornavirales, in the family Picornaviridae. Mammals of the order Artiodactyla (even-toed ungulates) serve as natural hosts, with senecaviruses reported in cows, pigs and dolphins.

Key takeaways

Senecavirus belongs to biology; place it in that map before memorising details.
Learn the definition first, then one example that makes the definition concrete.
Connect Senecavirus to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of Senecavirus from memory before moving on to harder problems.

Reference excerpt

Senecavirus is a genus of viruses in the order Picornavirales, in the family Picornaviridae. Mammals of the order Artiodactyla (even-toed ungulates) serve as natural hosts, with senecaviruses reported in cows, pigs and dolphins. The genus contains two species. Senecavirus is a replication-competent oncolytic picornavirus. It has selective tropism for cancers with neuroendocrine features including small cell lung cancer (SCLC) and several pediatric solid tumors including retinoblastoma, neuroblastoma, and medulloblastoma. A Phase I clinical trial of Senecavirus in adults with neuroendocrine tumors showed that senecavirus is apparently safe to administer at doses up to 1E11 vp/kg. It has potential antineoplastic activity.

Taxonomy The genus contains the following species, listed by scientific name and followed by the exemplar virus of the species:

Senecavirus cetus; Cetacean picornavirus 1 Senecavirus valles; Senecavirus A1, also called Seneca Valley virus

Structure Viruses in Senecavirus are non-enveloped, with icosahedral, spherical, and round geometries, with T=pseudo3 symmetry. The diameter is around 30 nm. Genomes are linear and non-segmented, around 7.3kb in length.

Life cycle Viral replication is cytoplasmic. Entry into the host cell is achieved by attachment of the virus to host receptors, which mediates endocytosis. Replication follows the positive stranded RNA virus replication model. Positive stranded RNA virus transcription is the method of transcription. The virus exits the host cell by lysis, and viroporins. Pig and maybe also cow serve as the natural host. The receptor for Seneca Valley virus has been identified as anthrax toxin receptor 1.

Discovery and origin The complete genome sequence of senecavirus was completed in 2008. An infectious clone of senecavirus was reported in 2012. Senecavirus has been proposed to attack cancer stem cells. Diagnostic monoclonal antibodies have been generated against senecavirus. While the sequence of SVV's protein-coding genome is most similar to members in the Cardiovirus genus, the non-coding RNA internal ribosome entry site (IRES) is most similar to those of the Pestivirus genus, including classical swine fever virus, and Hepacivirus genus, including Hepatitis C virus. The SVV IRES RNA shares similarities in sequence, structure, and function with the hepatitis C virus IRES. Subdomain IIa of the SVV and HCV IRES shares a similar structure and ligand-binding function as seen in its crystal structure. This subdomain IIa region is classified as a ligand-responsive RNA switch which adopts well-defined ligand-free and bound conformations without breaking or forming any base pairs in its secondary structure upon interconversion between the two states. This RNA switch from the SVV IRES has been incorporated into triangular RNA nanostructures.

Clinical trials The initial isolate is being developed as an anti-cancer therapeutic by virtual company Neotropix, Inc. under the name NTX-010. Phase I

Safety study of senecavirus in patients with solid tumors with neuroendocrine features. This study was published in 2011 and the data show that the virus was well tolerated by 30 patients and some signs of anti-tumour activity were observed. The data warranted further investigation of the virus in a phase II trial in small cell lung cancer. Phase II

Senecavirus after chemotherapy in treating patients with extensive-stage small cell lung cancer Senecavirus and cyclophosphamide in young patients with neuroblastoma, rhabdomyosarcoma, or rare tumors with neuroendocrine features

Virus replication Senecavirus uses the anthrax toxin receptor 1 (ANTXR1) protein as a receptor. A high-resolution structure of senecavirus with this receptor has been published.

Illustrations

Worked examples

Example 1 — a first encounter with Senecavirus

Start with the simplest possible case. Write down what Senecavirus claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In biology, the smallest case is usually a single object, a single equation or a single measurement. Check that every symbol or term in your sentence has a meaning in that case.

Example 2 — changing one variable

Take the situation from Example 1 and change exactly one quantity: double it, halve it, or set it to zero. Predict what should happen to Senecavirus before you calculate. Comparing your prediction with the result is the fastest way to find out whether you understand the idea or only the words.

Example 3 — an exam-style question

Typical questions about Senecavirus ask you to (a) state it precisely, (b) apply it to given data, and (c) explain a limitation. Practise writing all three answers in under five minutes; the third part is what separates a full-mark answer from an average one.

Applications of Senecavirus

In research: Senecavirus appears in biology research whenever the underlying quantities have to be modelled precisely. Papers usually cite it as a starting assumption and then explore where it breaks down.
In technology and industry: Engineering practice reuses Senecavirus in design rules, simulations and safety margins. Knowing the idea lets you read a specification sheet and understand why the numbers look the way they do.
In the classroom: Senecavirus is common in secondary-school and first-year university syllabi. It links to neighbouring topics Picornaviridae, Virotherapy, Virus genera, so understanding it makes those chapters shorter.
In everyday life: Look for Senecavirus outside the textbook — in sport, cooking, traffic, electronics or the sky above you. An example you found yourself is remembered far longer than one you were given.

Ask Teacher Smith questions about this articleOpens your AI tutor with a question about “Senecavirus” →

Affiliate

Preply — study more efficiently by working with a personal tutor. 50% off.

How to study Senecavirus in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what Senecavirus means in your own words.
Compare your version with the excerpt and mark what you missed.
Work through the three examples above with pen and paper.
Explain Senecavirus out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Senecavirus in simple terms?

Why does Senecavirus matter?

Because it connects several biology ideas at once: it gives you a definition you can apply, a quantity you can calculate, and a way to check whether a result is plausible.

How should I study Senecavirus?

Read the excerpt, restate it from memory, then work through the examples and applications listed on this page. The five-step study plan above takes about twenty minutes.

What does this page cover?

It gives you a compact reference excerpt plus original lgStudy explanations, examples, applications and study material on Senecavirus.