Evidence map›Paper›PMID 31792921›Full record

ReviewMolecular diagnosis & therapy2020

Leading RNA Interference Therapeutics Part 2: Silencing Delta-Aminolevulinic Acid Synthase 1, with a Focus on Givosiran.

Pedro Renato de Paula Brandão, Simoneide S Titze-de-Almeida, Ricardo Titze-de-Almeida

Registry-linked trialAbstract readReview
PubMed Publisher
In one paragraph

Review in Molecular diagnosis & therapy, 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. It is linked to trial NCT03338816 (ENVISION), which is not on this map. Cited by 38 papers, 2 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
38citing papers in PubMed, 2 pooled it
4.6field-weighted citation impact, top 4% of its field
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

NCT03338816 phase3completednot on this map

ENVISION: A Phase 3 Randomized, Double-blind, Placebo-Controlled Multicenter Study With an Open-label Extension to Evaluate the Efficacy and Safety of Givosiran in Patients With Acute Hepatic Porphyrias

TypeinterventionalSponsorAlnylam PharmaceuticalsRan2017 to 2021Enrolled94ConditionsAcute Hepatic Porphyria, Acute Intermittent Porphyria, Porphyria, Acute Intermittent, Acute PorphyriaArmsGivosiran, Placebo
3 · Its place in the literature

Who cites it

38 citing papers in PubMed, 2 syntheses or guidelines pooled it, 73 citations in OpenAlex.

  1. Pooled it
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  12. Unleashing the potential of catalytic RNAs to combat mis-spliced transcripts.Frontiers in bioengineering and biotechnology · 2023
    Review
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  15. Current Advances in RNA Therapeutics for Human Diseases.International journal of molecular sciences · 2022
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4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

3 authors at 1 institution in 2 countries.

Pedro Renato de Paula BrandãoTechnology for Gene Therapy Laboratory, Central Institute of Sciences, University of Brasília/FAV, Brasília, DF, Brazil.
Simoneide S Titze-de-AlmeidaTechnology for Gene Therapy Laboratory, Central Institute of Sciences, University of Brasília/FAV, Brasília, DF, Brazil.
Ricardo Titze-de-AlmeidaTechnology for Gene Therapy Laboratory, Central Institute of Sciences, University of Brasília/FAV, Brasília, DF, Brazil. ricardotitze.unb@gmail.com.ORCID 0000-0002-5019-4742
Universidade de Brasília · BR

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

In November 2019 givosiran became the second small interfering RNA (siRNA)-based drug to receive US Food and Drug Administration (FDA) approval, it has been developed for the treatment of acute intermittent porphyria (AIP), a disorder characterized by life-threatening acute neurovisceral attacks. The porphyrias are a group of disorders in which enzymatic deficiencies in heme production lead to toxic accumulation of delta-aminolevulinic acid (ALA) and porphobilinogen (PBG), which are involved in the neurovisceral attacks. Givosiran acts as a conventional siRNA to trigger RNA interference (RNAi)-mediated gene silencing on delta-ALA synthase 1 (ALAS1), thus returning ALA and PBG metabolites to the physiological level to attenuate further neurotoxicity. Givosiran makes use of a new hepatic-delivery system that conjugates three GalNac (N-acetylgalactosamine) molecules to the siRNA passenger strand. GalNac binds to the liver asialoglycoprotein receptor, favoring the internalization of these GalNac-conjugated siRNAs into the hepatic cells. In a phase I study, subcutaneous monthly administration of givosiran 2.5 mg/kg reduced > 90% of ALA and PBG content. This siRNA is being analyzed in ENVISION (NCT03338816), a phase III, multicenter, placebo-controlled randomized controlled trial. In preliminary results, givosiran achieved clinical endpoints for AIP, reducing urinary ALA levels, and presented a safety profile that enabled further drug development. The clinical performance of givosiran revealed that suppression of ALAS1 by GalNac-decorated siRNAs represents an additional approach for the treatment of patients with AIP that manifests recurrent acute neurovisceral attacks.

Indexed as

Gene SilencingGenetic TherapyRNA InterferenceAcetylgalactosamineClinical Trials as TopicDrug DevelopmentHemeHumansNitric Oxide Synthase Type IPorphyria, Acute IntermittentPyrrolidinesRNA, Small InterferingTreatment OutcomeAcetylgalactosaminegivosiranHemeNitric Oxide Synthase Type INOS1 protein, humanPyrrolidinesRNA, Small Interfering

Identifiers

PMID31792921
OpenAlexW2994359976

What OpenQuestion holds

Textmetadata
Read underepoch 390

Registered trials

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.