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Somatostatin Analogues and delivery methods in the pipeline

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This is my live blog post covering new developments in the area of new Somatostatin Analogues and new delivery systems. 

Abstract

As most of you will be aware, there are currently two main types of Somatostatin Analogues (SSA) in use for the treatment of mainstream Neuroendocrine Tumours (NETs) – Octreotide and Lanreotide.  You can click on the links for information on both of these well-known NET treatments.  This post will focus on the not so well known and anything in the pipeline including different delivery systems.

Those who have read the Octreotide/ Lanreotide patient leaflets will know those SSAs are also used in the treatment of a condition known as Acromegaly. You can see why the drug is used for both as they control the release of excess secretions of various substances, a problem that has an effect on both conditions. In the case of Acromegaly, the condition is typically caused by pituitary tumours that oversecrete the growth hormone leading to elevated levels of IGF-1. Like NETs, Octreotide/Lanreotide is currently the mainstay non-surgical treatment for this condition. For those not aware of Acromegaly there is a nice infographic explaining it here.   

Delivery methods discussed in this post include: a smaller, faster and easier Octreotide injection, an Octreotide capsule, an Octreotide nasal spray.  Other somatostatin analogues includes Pasireotide which has already been approved for Cushing’s Syndrome and Acromegaly (core NET possibilities have been investigated) and a new kid in the pipeline called Veldreotide for Acromegaly but potential additional applications in Cushing’s syndrome and neuroendocrine tumors. Finally for those with an interest in Cushings, a drug currently in phase 3 trials called RECORLEV™ (Levoketoconazole) which is not actually a somatostatin analogue, rather it’s a cortisol synthesis inhibitor.

It’s important to understand that NETs and other conditions including Cushings and Acromegaly, very often share the same hormone inhibiting drugs, thus why any development for these type of drugs is of interest to all physicians and patients in the associated conditions.

It’s also useful to understand that many of these drugs/delivery mechanisms are driven by availability of funding and are subject to the vagaries of the market. One entry on the previous version of this article has been removed as the company manufacturing it went into administration (Solid Dose Injections).

Somatostatin Analogues – New Delivery Methods in the Pipeline

New delivery system for Octreotide LAR – “Q-Octreotide” (MDT201)

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MTD201 (Q-Octreotide)

Updated 14 Dec 2017. Midatech Pharma has reported good results from a pre-clinical study of Q-Octreotide, its treatment for the side effects of Neuroendocrine tumours. The company’s speciality is drug delivery systems and MTD201 (Q-Octreotide) is a sustained release version of Octreotide designed to treat the incapacitating symptoms of metastatic Neuroendocrine Tumours, such as severe diarrhea and flushing. Q-Octreotide compared favourably with the standard Octreotide product and current market leader Sandostatin for acromegaly and carcinoid syndrome.

Apparently, the delivery method (see picture) is smaller, faster, easier. This project is expected to commence a Pilot study to compare the pharmacokinetics of Q-Octreotide versus Sandostatin LAR in humans mid-2017, followed by potential regulatory filings in 2018/19 and possible market approvals in the United States and the European Union thereafter. More to follow when known but in the meantime, please see a useful Video about Q-Octreotide. Apologies for the use of the out of date term ‘carcinoid‘.

New Octreotide Delivery Method – Chiasma Capsule

mycappsa

Octreotide Capsules? Graphic from http://www.chiasmapharma.com/

Updated 14 Dec 2017. Acromegaly appears to be in the lead in terms of new delivery methods.  A pharma company called Chiasma is working on an oral version of Octreotide for this condition and they are currently at Phase 3 trials.   You can check out the technology here.

Clearly, we want drugs to be safe and the announcement is another reminder of why drugs take so long to be approved.  Chiasma’s investigational oral octreotide uses their proprietary TPE® (Transient Permeability Enhancer) technology to facilitate gastrointestinal absorption of the unmodified drug into the bloodstream safely (i.e. it keeps the drug safe until it reaches its destination).  Hopefully, the new trial can convince the FDA to finally approve.  The trial is currently only Acromegaly based and details are here.

This is potentially an exciting development given that both conditions use the same drugs (Octreotide and Lanreotide injections) so there is always the hope that NETs might be next in line if the capsule version is finally approved.  However, still very early days as the company does not anticipate the release of top line date from the Phase 3 trial until 2020. 

Intranasal administration of Octreotide Acetate 

intravail

Nasal Spray Octreotide?

Updated 14 May 2017.  Dauntless Pharmaceuticals, Inc., a privately held biopharmaceutical company focused on the development of specialty therapeutics, announced the outcome of a Phase 1 clinical study to assess the safety, tolerability, pharmacokinetics, and pharmacodynamics of DP1038, a novel formulation of octreotide acetate for intranasal administration, compared to subcutaneous Sandostatin® (octreotide acetate) injection in healthy volunteers.  DP1038 (octreotide acetate for intranasal administration) is being developed via the 505(b)(2) regulatory pathway for the treatment of acromegaly and neuroendocrine tumors.  DP1038 leverages patented technology for enhanced intranasal absorption developed by Aegis Therapeutics, LLC, a drug delivery and drug formulation company that has successfully licensed its technology to leading pharmaceutical and biopharmaceutical companies whose partners have multiple late stage clinical programs under development. The drug will most likely use an administration system patented by Aegis called Intravail® Aegis Therapeutics LLC announced last year that it has been awarded U.S. Patent No. 9,446,134 providing non-invasive metered nasal spray delivery of Octreotide (click here to view the announcement). The enabling Aegis Intravail formulation technology is broadly applicable to a wide range of small molecule and biotherapeutic drugs to increase non-invasive bioavailability by the oral, nasal, buccal, and sublingual routes and to speed attainment of therapeutic drug levels in cases where a non-invasive (i.e., non-injectable) form of the drug is unavailable or where speed of onset is important.  A description of Intravail delivery systems can be found by clicking here.

About the Phase 1 Trial
The Phase 1 trial was designed to assess the safety, tolerability, pharmacokinetics and pharmacodynamics of DP1038, a novel formulation of octreotide acetate for intranasal administration, compared to subcutaneous Sandostatin® (octreotide acetate) Injection in healthy volunteers. In Part 1 of the study, each of 12 subjects received three doses of DP1038 plus 100 micrograms of subcutaneous octreotide acetate in a randomized 4 x 4 Latin square design. DP1038 was well tolerated across all doses and demonstrated a consistent, dose-proportional pharmacokinetic profile with significant nasal bioavailability. In Part 2 of the study, a single dose of DP1038, which was selected to exhibit a similar pharmacokinetic profile to subcutaneous octreotide acetate, was evaluated in 20 subjects in a cross-over design to compare the pharmacodynamic effect to 100 micrograms of subcutaneous octreotide acetate. Subjects were given a GHRH-arginine challenge, a standard test to stimulate growth hormone release, followed by administration of DP1038 or subcutaneous octreotide acetate. DP1038 showed comparable growth hormone suppression to the subcutaneous reference product. The news announcing the output from the Phase 1 clinical trial can be found by clicking here. Clearly, this is very early days and the product would need to go through the normal drug approval and acceptance routes etc.  However, a Phase 1 trial using patients is very exciting.

New Somatostatin Analogues in the Pipeline

New Somatostatin AnaloguePasireotide

signiforlar-22

Updated 14 Dec 2017.  Not really new but I wanted to include it because it’s not very well-known. Pasireotide is also known as Signifor and SOM230.  This drug is already in the pipeline but only for Acromegaly and Cushing’s Syndrome.  I found it interesting that is able to function as a multireceptor-targeted SSA by binding with high affinity to 4 of the 5 somatostatin receptors (sstrs 1, 2, 3 and 5), with the highest affinity for sstr5, resulting in inhibition of adrenocorticotropic hormone (ACTH) secretion (Octreotide only binds to sstrs 2, 3 and 5). In fact, Signifor represents the first specific treatment for ACTH-secreting pituitary adenomas.  Moreover, it is the first approved medical treatment for Cushing’s disease.  If you’ve read my blog on NET Syndromes, you will see the connection – both involve pituitary tumours and this drug is designed to cater for scenarios where surgery has not solved the problem or is not an option. Interestingly Novartis describes it as a second generation SSA, inferring that Octreotide is first generation.  It comes in short and long acting (LAR) forms with a similar delivery system to Octreotide. It is a US FDA approved orphan drug and is also approved for use in the EU.  Novartis has also submitted additional regulatory applications for Signifor LAR worldwide.   You can read more by clicking here

However, there have been studies in its use for advanced NETs where Octreotide is not working or has not sufficiently controlled the effects of the syndrome.  You can read a full text article about the study results by clicking here (you will recognise some of the authors including Edward M Wolin, Christos Toumpanakis, John Ramage, Kjell Öberg).  My interpretation of the trial conclusion is that there does not appear to be any significant advantages of Pasireotide over Octreotide.  The attachment also confirmed studies are ongoing including a potential combination treatment of Pasireotide and Everolimus (Afinitor).  There does not appear to be a study comparing it to Lanreotide.

Jonathan R. Strosberg, MD, associate professor at H. Lee Moffitt Cancer Center, discussed pasireotide as a potential treatment for patients with neuroendocrine tumors (NETs). He said “Pasireotide is a somatostatin analog similar to octreotide (Sandostatin) and lanreotide (Somatuline). However, pasireotide targets 4 out of the 5 somatostatin receptor subtypes, which may provide it with an advantage over the other 3 agents. Thus far, there has not been enough evidence showing that pasireotide has a progression-free survival benefit over the other 2 therapies. It is also associated with hyperglycemia. Pasireotide may be an appropriate choice for patients in later lines of therapy. In the future, he envisions that patients could be selected for therapy based on their somatostatin receptor profile.”

New Somatostatin Analogue  – Veldoreotide (COR-005)

Updated 14 Dec 2017. There is another new drug in the pipeline currently known as Veldoreotide or COR-005 (although I can see the term ‘Somatoprim’ used on other searches). COR-005 is an investigational SSA in phase 2 development for treatment of patients with Acromegaly. Although the page on the manufacturer’s website does not mention NETs, an announcement of its progress has just been made at the Endocrine Society’s annual conference for 2016. The announcement states that the drug has “potential additional applications in Cushing’s syndrome and neuroendocrine tumors”.  COR-005 targets somatostatin receptors 2, 4 and 5. Read about the drug here.

COR-005 has received orphan drug designation (only for Acromegaly) in the US and EU. There is not enough data to understand how this might benefit NETs and what the differences would be.  Hopefully, an update will be available later which will result in an update to this post.

For those interested in Cushing’s Syndrome, (hypercortisolism or high levels of cortisol), the same manufacturer working on Veldoreotide is also working on a new drug in Phase 3 trials known as RECORLEV™ (Levoketoconazole). Not actually a somatostatin analogue, rather it’s a cortisol synthesis inhibitor

Summary

This information is provided for information only.  There is no intent to indicate at this point that these new drugs will eventually be approved for NETs.  However, it’s another indication that people are working on new treatments which might end up being available at some stage.

The pipeline for new treatments and methods of delivery continues to grow!

Thanks for reading

Ronny

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Remember ….. in the war on Neuroendocrine Cancer, let’s not forget to win the battle for better quality of life!

 

 


1 Comment

  1. Deanna Vickery, Mrs says:

    Always heartwarming to see the erstwhile ‘separate’ diseases gradually being pulled under the hormonal umbrella
    Interesting read thankyou Ronny

    Liked by 1 person

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