Add tick cement to the list of natural adhesives pursued for medical applications

In past posts, we have reported on multiple naturally-occurring substances or methods for strong adhesion that are being investigated for their potential to be exploited for medical or surgical adhesion. These include adhesives from remora, mussels, geckos, crab shells, barnacles, Australian burrowing frogs, spider webs, porcupine quills, sandcastle worms, etc.

Researchers from MedUni Vienna and Vienna University of Technology are now investigating 300 different ticks for the “cement” used by the parasites to attach to hosts. The goal is to study the composition of the natural tick “dowel” used by the mouthparts of ticks and determine how it might serve as a template for new tissue adhesives.

The Vienna research also notes other natural adhesives are similarly being investigated for medical and surgical use:

Other potential “adhesive donors” are sea cucumbers, which shoot sticky threads out of their sac; species of salamander, which secrete extremely fast-drying adhesive out of skin glands, if attacked; or insect larvae, which produce tentacles or crabs, which can remain firmly “stuck,” even under water.

The incentive for studying natural adhesives is that they have been driven by evolution to provide strong adhesion without toxicity in various wet or dry conditions that are challenging for existing synthetic or existing natural glues (e.g., fibrin glues, cyanoacrylates, etc.). Surgical glues currently in use have some limitation arising from lesser strength, ease of use, toxicity, and other shortcomings. New glues will gain wider adoption, capturing procedure volume used with sutures, clips and other closure methods, particularly in internal use, if they are stronger and/or provide tighter seals (without needing to be combined with sutures on the same incision/wound) and do not cause the toxicity that some high strength medical glues do (e.g., synthetics like cyanoacrylates; “super glues”). The biologically-derived glues (or the surfaces structures of gecko feet) avoid the toxicities of synthetics and have often proven to have very high tensile strength. (The fast-curing cement used by barnacles has been shown to have a remarkable tensile strength of 5,000 pounds per square inch.)

Edit: See also, Biomimetic Glue, based on shellfish natural adhesive.


MedMarket Diligence tracks the technologies, clinical practices, companies, and markets associated with medical and surgical sealants and glues, with the most recent coverage in, “Worldwide Markets for Medical and Surgical Sealants, Glues, and Hemostats, 2015-2022,” (report #S290).

Medical and Surgical Sealants, Glues, and Hemostats, to 2022

There are several different classes of surgical sealants, glues and hemostatic products used to prevent or stop bleeding, or to close a wound or reinforce a suture line. These include fibrin sealants, surgical sealants, mechanical hemostats, active hemostats, flowable hemostats, and glues. Both sealants and medical glues are increasingly used either as an adjunct to sutures or to replace sutures.

Medical Sealants

Fibrin sealants are made of a combination of thrombin and fibrinogen. These sealants may be sprayed on the bleeding surface, or applied using a patch. Surgical sealants might be made of glutaraldehyde and bovine serum albumin, polyethylene glycol polymers, and cyanoacrylates.

Sealants are most often used to stop bleeding over a large area. If the surgeon wishes to fasten down a flap without using sutures, or in addition to using sutures, then the product used is usually a medical glue.

Source: MedMarket Diligence, LLC; Report #S290.

Hemostatic Products

The surgeon and the perioperative nurse have a variety of hemostats from which to choose, as they are not all alike in their applications and efficacy. Selection of the most appropriate hemostat requires training and experience, and can affect the clinical outcome, as well as decrease treatment costs. Some of the factors that enter into the decision-making process include the size of the wound, the amount of hemorrhaging, potential adverse effects, whether the procedure is MIS or open surgery, and others.

Active hemostats contain thrombin products which may be derived from several sources, such as bovine pooled plasma purification, human pooled plasma purification, or through human recombinant manufacturing processes. Flowable-type hemostats are made of a granular bovine or porcine gelatin that is combined with saline or reconstituted thrombin, forming a flowable putty that may be applied to the bleeding area.
Mechanical hemostats, such as absorbable gelatin sponge, collagen, cellulose, or polysaccharide-based hemostats applied as sponges, fleeces, bandages, or microspheres, are not included in this analysis.

Source: MedMarket Diligence, LLC; Report #S290.

Medical Glues

Sealants and glues are terms which are often used interchangeably, which can be confusing. In this report, a medical glue is defined as a product used to bond two surfaces together securely. Surgeons are increasingly reaching for medical glues to either help secure a suture line, or to replace sutures entirely in the repair of soft tissues. Medical glues are also utilized in repairing bone fractures, especially for highly comminuted fractures that often involve many small fragments. This helps to spread out the force-bearing surface, rather than focusing weight-bearing on spots where a pin has been inserted.

Thus, the surgeon has a fairly wide array of products from which to choose. The choice of which surgical hemostat or sealant to use depends on several factors, including the procedure being conducted, the type of bleeding, severity of the hemorrhage, the surgeon’s experience with the products, the surgeon’s preference, the price of the product and availability at the time of surgery. For example, a product which has a long shelf life and does not require refrigeration or other special storage, and which requires no special preparation, usually holds advantages over a product which must be mixed before use, or held in a refrigerator during storage, then allowed to warm up to room temperature before use.

Source: MedMarket Diligence, LLC; Report #S290.


From “Worldwide Market for Medical and Surgical Sealants, Glues, and Hemostats, 2015-2022.” See details at link. Order online.

Regional Markets for Surgical Sealants, 2015 and 2022

The fastest growth in the sales of surgical sealants over the next decade will be in the Asia-Pacific region, driven primarily by very strong healthcare market growth in China, and reaching a CAGR (2016-2022) of at least 13.97%. The growth rate in China would be even higher, but will be dampened for the time being by the lack of surgeons trained in the proper use of these products, as well as the limitations of reaching a dispersed patient population. Nonetheless, the A/P share of the global sealants market will double in the next seven years!

Below illustrates the geographic distribution of surgical sealants (fibrin and others) in 2015.

Regional Markets for Sealants, Fibrin and Other Sealant Products,
2015 & 2022, USD Millions

2015screen-shot-2016-11-11-at-8-52-44-am

2022

screen-shot-2016-11-11-at-8-53-17-am

Source: MedMarket Diligence, LLC; Report #S290.


Report #S290 may be purchased online for PDF download or print delivery; in single, site, or global licenses.

Wound closure and healing via sealants, glues, hemostats in development

Natural tissue healing is a highly complex dance of processes that need to be working properly in order for the body to heal. Mammals have developed the ability to heal wounds rapidly through a cascade of processes that starts with hemostasis (blood clotting) to slow or stop the loss of blood. From the moment of injury, platelets start to aggregate, as well as starting to release cytokines, chemokines and hormones. Vasoconstriction takes place as the body tries to limit the loss of blood, and several vasoactive mediators come into play, including, norepinephrine, epinephrine, prostaglandins, serotonin, and thromboxane. Activated platelets lead to formation of a clot. Next, the inflammatory steps kick in, targeting and killing microbes and launching a natural internal debridement process, which serves to clean up any damaged tissue so that reconstruction may occur. Last in the cascade are the proliferative and maturation phases. These involve the deposition of new tissue matrix materials, and are intended to lead to reconstruction of tissue organelles and cellular structure. These healing steps actually overlap one another, and do not have strict times when each process begins or ends.

A delicate physiological balance must be maintained during the healing process to ensure timely repair or regeneration of damaged tissue. Wounds may fail to heal or have a greatly increased healing time when unfavorable conditions are allowed to persist. An optimal environment must be provided to support the essential biochemical and cellular activities required for efficient wound healing and to remove or protect the wound from factors that impede the healing process.

Factors affecting wound healing may be considered in one of two categories depending on their source. Extrinsic factors impinge on the patient from the external environment, whereas intrinsic factors directly affect the performance of bodily functions through the patient’s own physiology or condition. Factors which strongly affect wound healing include smoking, diabetes, age, oxygenation, stress, obesity, certain medications, alcoholism and nutrition.

Timescales for Development of
Sealants, Glues and Hemostat Products

screen-shot-2016-10-31-at-2-55-14-pm

Source: MedMarket Diligence, LLC; Report #S290.

While product development continues apace, and companies are launching their products in new countries, launches of actual new products has been relatively slow. This is due most likely to the highly technical (read: expensive) nature of the product development, as well as the cost and time involved in running clinical trials, and the strong patent protection which has been erected, especially by the leading companies. The need for the products is there, but the required clinical testing is putting a brake on the markets.

In July 2015, HyperBranch announced the product launch of Adherus® AutoSpray Dural Sealant in the US. FDA clearance to market the product was obtained in March 2015. The absorbable sealant is intended for use in brain surgery and is applied over the sutures for dura repair to prevent cerebrospinal fluid from leaking out of the incision site. The Adherus® AutoSpray Dural Sealant is made of two solutions: a PEG ester solution and a polyethylenimine (PEI) solution. When mixed together, the solutions combine to form a sealant gel that is applied to the incision site. According to the company, the sealant is fully absorbed in about 90 days.

Cohera Medical launched its TissuGlu® in select US cities in November 2015. At this point, TissuGlu® is available in ten cities in the USA, while B. Braun is the distributor for the product in Germany, Spain and Portugal.

Sanyo Chemical launched its first medical device, Hydrofit, in February 2014. The company obtained the approval of the medical device under the Pharmaceutical Affairs Law in December 2011, filing it as a novel surgical hemostatic agent intended for anastomosing the arterial blood and artificial blood vessel in surgical procedures. According to the company, the product will be produced by Sanyo and marketed by Terumo.

In 2014, Cohera Medical, Inc. launched Sylys Surgical Sealant, which can be used in gastrointestinal surgery to decrease anastomotic leak. In the same year, Baxter also gained the FDA permission for Tisseel® fibrin sealant, which, according to the company, is used in almost all types of surgical procedures.

Mallinckrodt will invest in the commercial launch and ongoing market development of both PreveLeak and Raplixa in FY 2016. According to the company, both products are faster to prepare and easier to use and store than competing products. PreveLeak, a surgical sealant, is allegedly more flexible than hemostasis glue products. It is indicated for use in vascular reconstructions to achieve adjunctive hemostasis by sealing areas of leakage. PreveLeak is currently marketed in Europe through distributors.

In an example of a delayed launch, CryoLife has been working towards launch of PerClot in the US, but ran into litigation trouble with Medafor, a wholly-owned subsidiary of CR Bard. In November 2015, CryoLife announced that it had entered into a resolution with Medafor to end the patent dispute in the US District Court for the District of Delaware between the companies regarding PerClot. Under terms of the resolution, all parties agreed to end the litigation, jointly dismissing all claims and counterclaims with prejudice and waiving all appeal rights in this case.  Each party is to pay its own attorneys’ fees and costs associated with the litigation.  However, the court’s preliminary injunction entered March 31, 2015 with respect to CryoLife’s marketing and sale of PerClot in the US will remain in effect until the expiration of Medafor’s US Patent No. 6,060,461 (the “‘461 Patent”) on February 8, 2019. CryoLife management says that this will not upset their plans, as CryoLife does not expect to receive FDA market approval for PerClot before 2018, if then.


From “Sealants, Glues, Hemostats to 2022” (#S290).

Medical, Surgical Sealants — Fibrin and Others

screen-shot-2016-10-26-at-2-23-29-pmFibrin is the result of the combination of solutions of thrombin and fibrinogen. This forms a clot just as in the body during the coagulation cascade. The thrombin then breaks the fibrinogen molecules into smaller bits of another blood protein, called fibrin. Fibrin molecules arrange themselves into a lattice with strands cross-linked by the blood component, Factor XIII. This resulting cross-linked net helps to stabilize the clot.

Numerous variants of fibrin sealant exist, including autologous products. Other, non-fibrin sealant types are thrombin, collagen & gelatin-based sealants.

Fibrin sealants are used in the US in a wide array of applications; they are used the most in orthopedic surgeries, where the penetration rate is thought to be 25-30%. Fibrin sealants can, however, be ineffective under wet surgical conditions. The penetration rate in other surgeries is estimated to be about 10-15%.

Fibrin-based sealants were originally made with bovine components. These components were judged to increase the risk of developing bovine spongiform encephalopathy (BSE), so second-generation commercial fibrin sealants (CSF) avoided bovine-derived materials. The antifibrinolytic tranexamic acid (TXA) was used instead of bovine aprotinin. Later, the TXA was removed, again due to safety issues. Today, Ethicon’s (JNJ) Evicel is an example of this product, which Ethicon says is the only all human, aprotinin free, fibrin sealant indicated for general hemostasis. Market growth in the sealants sector is driven by the need for improved biocompatibility and stronger sealing ability—in other words, meeting the still-unsatisfied needs of physician end-users.

The current market penetration of sealant products in the US stands at about 25% of eligible surgeries, with their largest volume of use in orthopedics.

Selected Fibrin and Other Sealant Types*

screen-shot-2016-10-26-at-2-10-21-pm

*Market status on each detailed in report S290.

Source: MedMarket Diligence, LLC; Sealants, Glues, Hemostats to 2022.

 

Components used in surgical sealants

While fibrin is a biological sealant that has been harnessed by several companies to provide tissue sealing, a wide variety of other components and component combinations have been developed for sealant use.

Below are sealant formulations from selected participants in the market for surgical sealants:

Sealant Components by Manufacturer

CompanySealant component(s)
AdhesysPolyurethane
CoheraUrethane & lysine
EndomedixDextran and chitosan biopolymers
Gecko BiomedicalProprietary, light-activated, synthetic elastomer
GrifolsFibrin sealant
BaxterHuman fibrinogen and thrombin
EthiconFibrin sealant
BardHydrogel
TakedaFibrin sealant
The Medicines CompanyFibrin sealant, and synthetic sealant
CryoLifeBovine serum albumin and glutaraldehyde adhesive
HyperbranchActivated polyethylene glycol polyethlyeneimine
Integra LifesciencePolyethylene glycol hydrogel
LifeBondPolymer hydrogel matrix
Ocular TherapeutixPolyethylene glycol and trilysine
SealantisAlga-mimetic tissue adhesives

Source: MedMarket Diligence, LLC; Report #S290.

The Demand for Sealants, Glues, and Hemostats in 2016

The following is drawn from “Worldwide Markets for Medical and Surgical Sealants, Glues, and Hemostats, 2015-2022.” Report #S290.

The need for surgical sealants, glues and hemostats is directly related to the clinical caseload and procedure volumes, as well as to the adoption of these products for multiple uses, such as the use of one product for sealing, hemostasis and anti-adhesion. It is fair to say that use of these products has become routine in the surgical suite and in other clinical locations. Procedure volumes are in turn driven by demographic forces, including global aging populations, while regulatory changes will continue to influence uptake of these products.

wound-prevalance

Source: MedMarket Diligence, LLC; Report #S290.

Medical Sealants

Fibrin sealants are made of a combination of thrombin and fibrinogen. These sealants may be sprayed on the bleeding surface, or applied using a patch. Surgical sealants might be made of glutaraldehyde and bovine serum albumin, polyethylene glycol polymers, and cyanoacrylates.

Sealants are most often used to stop bleeding over a large area. If the surgeon wishes to fasten down a flap without using sutures, or in addition to using sutures, then the product used is usually a medical glue.

Hemostatic Products

The surgeon and the perioperative nurse have a variety of hemostats from which to choose, as they are not all alike in their applications and efficacy. Selection of the most appropriate hemostat requires training and experience, and can affect the clinical outcome, as well as decrease treatment costs. Some of the factors that enter into the decision-making process include the size of the wound, the amount of hemorrhaging, potential adverse effects, whether the procedure is MIS or open surgery, and others.

Active hemostats contain thrombin products which may be derived from several sources, such as bovine pooled plasma purification, human pooled plasma purification, or through human recombinant manufacturing processes. Flowable-type hemostats are made of a granular bovine or porcine gelatin that is combined with saline or reconstituted thrombin, forming a flowable putty that may be applied to the bleeding area.

Medical Glues

Sealants and glues are terms which are often used interchangeably, which can be confusing. In this report, a medical glue is defined as a product used to bond two surfaces together securely. Surgeons are increasingly reaching for medical glues to either help secure a suture line, or to replace sutures entirely in the repair of soft tissues. Medical glues are also utilized in repairing bone fractures, especially for highly comminuted fractures that often involve many small fragments. This helps to spread out the force-bearing surface, rather than focusing weight-bearing on spots where a pin has been inserted.

Thus, the surgeon has a fairly wide array of products from which to choose. The choice of which surgical hemostat or sealant to use depends on several factors, including the procedure being conducted, the type of bleeding, severity of the hemorrhage, the surgeon’s experience with the products, the surgeon’s preference, the price of the product and availability at the time of surgery. For example, a product which has a long shelf life and does not require refrigeration or other special storage, and which requires no special preparation, usually holds advantages over a product which must be mixed before use, or held in a refrigerator during storage, then allowed to warm up to room temperature before use.

 

Recent Merger and Acquisition Activity in Sealants, Glues and Hemostats

Growth in sealants, glues, and hemostats markets has been strong enough for long enough to have attracted a lot of players. With growth slowing as the untapped potential is reducing more rapidly, consolidation has now appeared in the natural order of things.

Recent Merger and Acquisition Activity in Sealants, Glues and Hemostats

Original Company/ ProductAcquiring or Collaborating CompanyDate of Acquisition/Collaboration DealFinancial Details (where revealed)
Bristol-Myers Squibb/ Recothrom¨ Thrombin topical hemostatThe Medicines Company2012/2014$105 million collaboration fee
Cohera Medical/TissuGlu¨Collaboration with B. Braun Surgical S.A. to distribute in Germany, Spain and Portugal.Jan. 2015B. Braun Surgical S.A. will exclusively market and sell TissuGlu in the territories of Germany, Spain and Portugal through its existing Closure Technologies commercial teams.
Profibrix/ FibroCapsThe Medicines Company2013$90 million, with $140 million contingent upon milestones
Medafor/Arista¨ AH Absorbable Hemostatic ParticlesCR Bard (Bard Davol)2013$200 million upfront payment
Tenaxis Medical, with ArterX (among other products)The Medicines Company2014$58 million in upfront payments
The Medicines Company/ PreveLeakª (formerly known as ArterX), Raplixaª(formerly known as FibroCaps) fibrin sealant, Recothrom¨ Thrombin topical (Recombinant) sealantMallinckrodt plc2016The entire deal has a potential value of $410 million.
Xcede Technologies, Inc./Resorbable Hemostatic PatchCollaboration with Cook BiotechJan-16Signed three collaboration agreements with Cook Biotech, including a Development Agreement, a License Agreement and a Supply Agreement to complete development, seek regulatory clearance and produce XcedeÕs resorbable hemostatic patch.

Source: MedMarket Diligence, LLC; Report #S290.

To request a set of report excerpts, click here.

Sealants, Glues, Hemostats to 2022

 

Below is our bubble chart giving the segment size (bubble size and horizontal axis position) and growth (vertical axis position) of the products detailed in our 2014 report #S192.

Source: MedMarket Diligence, LLC; Report #S192 (published Oct. 2014)

Given the interest by companies actively involved in sealants, glues, and hemostats, we are publishing Report #S290 (June 2016), “Worldwide Markets for Medical and Surgical Sealants, Glues, and Hemostats, 2015-2022.”

From Skitch