Classifications

• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
  • A61K47/00—Medicinal preparations characterised by the non-active ingredients used, e.g. carriers or inert additives; Targeting or modifying agents chemically bound to the active ingredient
  • A61K47/06—Organic compounds, e.g. natural or synthetic hydrocarbons, polyolefins, mineral oil, petrolatum or ozokerite
  • A61K47/26—Carbohydrates, e.g. sugar alcohols, amino sugars, nucleic acids, mono-, di- or oligo-saccharides; Derivatives thereof, e.g. polysorbates, sorbitan fatty acid esters or glycyrrhizin
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
  • A61K9/00—Medicinal preparations characterised by special physical form
  • A61K9/0012—Galenical forms characterised by the site of application
  • A61K9/0014—Skin, i.e. galenical aspects of topical compositions
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
  • A61K9/00—Medicinal preparations characterised by special physical form
  • A61K9/0012—Galenical forms characterised by the site of application
  • A61K9/0019—Injectable compositions; Intramuscular, intravenous, arterial, subcutaneous administration; Compositions to be administered through the skin in an invasive manner
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
  • A61K9/00—Medicinal preparations characterised by special physical form
  • A61K9/10—Dispersions; Emulsions

Definitions

• aspects of the present disclosure relate generally to cellular compositions, and in particular aspects to liquid compositions useful for diluting or suspending cells previously subjected to cryopreservation.
• compositions to humans and animals in the treatment of various pathologies or disorders has become increasingly prevalent and bears hope to improve a multitude of therapies.
• the nature of the cellular composition as it is administered to the patient is important. Additives to the compositions must be biologically acceptable to the patient. As well, the state of the cells in the composition, as well as their viability before, during and after the administration protocol, are of high importance.
• cells suspended in liquid media often tend to aggregate or clump. Clumping has been observed as a particular problem in some cases after cells have been cryopreserved and then thawed. This can frustrate attempts to recover, retain and deliver high therapeutic doses of cells. As well, administration of highly clumped cellular preparations may pose risks to the patient that could be ameliorated with effective ways to minimize or reduce cell clumping.
• aqueous media containing trehalose find advantageous use in conjunction with the preparation of cell suspensions, preferably mammalian cell suspensions.
• Trehalose has been discovered to beneficially inhibit cell clumping, allowing for the preparation of improved cell suspensions for therapeutic or other uses.
• the cells can be cells previously subjected to cryopreservation and thawing.
• the thawed cells can be combined with an aqueous medium containing trehalose to prepare a cell suspension.
• a method for preparing a cell suspension includes the steps of (i) thawing cryopreserved cells to provide thawed cells; and (ii) combining the thawed cells with an aqueous medium containing trehalose.
• the combining step includes affecting a dilution of the thawed cells from a first, higher density of cells per milliliter (cells/mL) to a second, lower density of cells/mL.
• the dilution can be cause at least a 30% reduction in the density in cells/mL, or at least a 50% reduction in the density in cells/mL.
• the dilution can be from first density of greater than 3 million cells/mL to a second density of less than 2.5 million cells/mL, for example in the range of about 250,000 to about 2.5 million cells/mL.
• liquid compositions for preparing a trehalose-containing cell suspension.
• the liquid compositions include a sterile aqueous medium containing trehalose at a concentration in the range of about 0.5% to about 20% by weight, more preferably about 0.5% to about 10% by weight, and/or having an osmolarity in the range of about 200 to about 600.
• the compositions can include about 0.9% sodium chloride and are desirably also buffered, for example with phosphate buffer, and have a pH of about 6 to about 8.
• kits for preparing a cell suspension that include liquid trehalose compositions as described above and elsewhere herein, in combination with a container, for example a bag, for combining the liquid trehalose composition with cells.
• the kits can also include a container (e.g. a vial or bag) containing the cells to be combined with the liquid trehalose composition and/or a filter through which the prepared cell suspension can be passed prior to administration of the cell suspension into a patient. Additional embodiments, as well as features and advantages thereof, will be apparent from the descriptions herein.
• Trehalose also known as mycose or tremalose, is an alpha-linked
• an aqueous medium e.g. solution
• the aqueous medium can contain any suitable concentration of trehalose for these purposes.
• the aqueous medium contains trehalose at a concentration of about 1% to about 20% by weight, or about 1% to about 10% by weight, or about 2% to about 7% by weight, or about 2.5% to about 5% by weight, or about 3% to about 4% by weight.
• the aqueous medium can also include other components.
• it can include sodium chloride at a physiologically acceptable level, for example at a level in the range of about 0.5% to about 1.5%, e.g. about 0.9% (isotonic).
• the aqueous medium can also include a buffer, for example phosphate buffer, and can have a pH in the range of about 6 to 8, or about 6.8 to 7.8, or about 7 to 7.5.
• the aqueous medium can also have an osmolarity in the range of 200 to 600 milliosmols per kilogram (mosm/kg), or 250 to 500 mosm/kg, or 250 to 400 mosm/kg.
• the aqueous medium can be combined with the cells to prepare a trehalose- containing cell suspension having a suitable concentration of trehalose.
• This concentration of trehalose in certain embodiments, is in the range of about 1% to about 10% by weight trehalose or about 2% to about 7% by weight, or about 2.5% to about 5% by weight, or about 3% to about 4% by weight.
• the concentration of trehalose can be effective to inhibit clumping of the cells as compared to a corresponding cell suspension without the trehalose. Inhibition of clumping can be observed by the formation of fewer and/or smaller clumps of cells in the prepared cell suspension, for example at a time point at least ten minutes after preparation of the cell suspension, at least twenty minutes after preparation of the cell suspension, or at least after 60 minutes after preparation of the cell suspension.
• the capacity of the trehalose to inhibit clumping for significant periods of time following preparation of the cell suspension can, for example, provide sufficient time to administer the prepared cell suspension to a patient, for example by injecting or infusing the cell suspension into the bloodstream of a patient by venous or arterial access and/or by local implantation of the cell suspension.
• the suspension can be administered to the patient over a relatively prolonged period of time, for example at least 10 minutes, at least 20 minutes, or at least 60 minutes.
• the cell composition that is used in the preparation of the trehalose-containing cell suspensions disclosed in this document can be any suitable cell composition.
• the cell composition will be one that has been cryopreserved.
• Such cryopreservation can in certain aspects involved freezing the cell composition at a temperature of -60°C or lower, of -80°C or lower, and in certain aspects at a temperature of about -196°C (e.g. in liquid nitrogen).
• Cryopreserved cell compositions will typically include a cryoprotectant agent, for example dimethyl sulfoxide (DMSO), glycerol, lactose-egg yolk extender, trehalose and/or other such agents.
• DMSO dimethyl sulfoxide
• glycerol glycerol
• lactose-egg yolk extender lactose-egg yolk extender
• trehalose trehalose and/or other such agents.
• the cryopreserved cell compositions will be trehalose-free or essentially trehalose-free (i.e. containing less than about 0.1% trehalose).
• the cell density of the cryopreserved or other cell composition to be used can vary. In some forms, the cell density will be at least about 1 million cells/mL, at least 2 million cells/mL, or at least 5 million cells/mL, and typically in the range of 1 million cells/mL to 100 million cells/mL, more typically in the range of 1 million cells/mL to 20 million cells/mL.
• the cells can be sealed within a suitable container such as a cryobag or cryovial, constructed to withstand the conditions of the cryopreservation while maintaining the integrity of the container seal.
• the cells can be skin cells, skeletal muscle cells, cardiac muscle cells, lung cells, mesentery cells, adipose cells, or stem cells such as mesenchymal stem cells.
• Adipose cells may be from omental fat, properitoneal fat, perirenal fat, pericardial fat, subcutaneous fat, breast fat, or epididymal fat.
• the cells comprise stromal cells, stem cells, or combinations thereof.
• stem cells is used in a broad sense and includes traditional stem cells, adipose derived stem cells, progenitor cells, preprogenitor cells, reserve cells, and the like.
• Exemplary stem cells include embryonic stem cells, adult stem cells, pluripotent stem cells, neural stem cells, liver stem cells, muscle stem cells, muscle precursor stem cells, endothelial progenitor cells, bone marrow stem cells, chondrogenic stem cells, lymphoid stem cells, mesenchymal stem cells, hematopoietic stem cells, central nervous system stem cells, peripheral nervous system stem cells, and the like. Additional illustrative cells which can be used include hepatocytes, epithelial cells, Kupffer cells, fibroblasts, neurons, cardiomyocytes, myocytes, chondrocytes, pancreatic acinar cells, islets of
• osteocytes osteocytes, myoblasts, satellite cells, endothelial cells, adipocytes, preadipocytes, biliary epithelial cells, and progentior cells of any of these cell types.
• mesenchymal stem cells can be obtained from any suitable tissue. These include as examples MSCs derived from dental tissue (such as those harvested from dental pulp, periodontal ligaments, or other dental tissues), testicle tissue, bone marrow; peripheral blood, placental tissue, uterine tissue (including endometrial regenerative cells), umbilical cord blood, umbilical cord tissue, or skin tissue (including full thickness skin tissue). These or other MSCs can be used in aspects of the present disclosure.
• the MSCs can be generally an adherent cell population expressing markers CD90 and CD 105 (>90%) and lacking expression of CD34 and CD45 and MHC class II ( ⁇ 5%) as detected by flow cytometry.
• the cells used in the embodiments herein can be from any suitable species of animal, for example a mammal, such as a human, canine (e.g. dog), feline (e.g. cat), equine (e.g. horse), porcine, ovine, caprine, or bovine mammal.
• a mammal such as a human, canine (e.g. dog), feline (e.g. cat), equine (e.g. horse), porcine, ovine, caprine, or bovine mammal.
• the cell composition used to prepare the trehalose-containing cell suspension can be combined with trehalose in a variety of ways.
• the cell composition can be combined with an aqueous liquid medium, such as an aqueous solution, containing the trehalose.
• the cell composition can be added to the medium containing trehalose, the medium containing trehalose can be added to the cell composition, or both.
• the combination of the two materials can be conducted so as to preserve the viability of the cells to the extent practicable. A gradual combination, optionally with gentle agitation, can be conducted for these purposes.
• a cryopreserved cell composition When a cryopreserved cell composition is used, it is typically thawed prior to combining it with the trehalose-containing medium. Any suitable thawing technique can be used.
• the cell composition is thawed by immersion of a container, such as a bag or vial, containing the cryopreserved cells into a liquid bath, e.g. heated to about 37 °C. After the cell composition has thawed (e.g. by the observation of a lack of ice crystals in the composition), the cell composition can be combined with the trehalose-containing medium.
• the container for the cryopreserved cells is provided with a sterile access port or member, such as a septum, and after thawing, the thawed cell composition including the cells and the medium in which they were stored is drawn from the container with a needle and syringe or other suitable transfer device. At least the cell component thereof is thereafter combined with the trehalose-containing medium, and in some forms the cells and the storage medium are combined with the trehalose-containing medium. In cases where the storage medium is not included in the combination step with the trehalose-containing medium, the cells can for example be washed with another physiologically-acceptable medium, and then combined with the trehalose-containing medium.
• a sterile access port or member such as a septum
• the cell composition combined with the trehalose-containing medium can, and will typically, include cell components that have been released by dead cells into the liquid medium suspending the cells, including for example DNA.
• This DNA can be a contributing factor to the tendency of the cells to form clumps, and the presence of the trehalose in the prepared cell suspension can inhibit the DNA-facilitated clumping of the cells.
• the combination of the cells (and optionally their storage or wash medium) with the trehalose-containing medium can be conducted in any suitable container or vessel.
• the combination is conducted in a second container (other than the cryostorage or other container in which the cells were stored or held).
• This second container can include an input port or other input member, for example a septum, for sterile transfer of materials such as the cells and/or the trehalose-containing medium into the second container.
• combining the cell composition and trehalose-containing medium can include delivering both of these into the second container, for example in either order or simultaneously.
• the second container can be provided as a pre-manufactured container already containing the trehalose-containing medium in sterile condition, and the cell composition can be added to the pre-manufactured container.
• the second container can be a bag and/or can have an outlet port spaced from the input port or other member for delivery of the cells from the bag or other container, e.g. for delivery into a patient.
• the second container can be a bag having a septum for sterile input of materials and a valved port for outlet of materials, e.g. as occurs in common saline bags for patient treatment in medical care.
• the cells can be sterilely delivered into the bag by needle through the septum, and the prepared trehalose- containing cell suspension can be sterilely delivered to the patient through the valved port.
• the prepared trehalose-containing cell suspension can have any suitable density of the cells.
• the prepared trehalose-containing cell suspension will have a cell density of at least 100,000 cells/mL, at least 200,000 cells/mL, at least 500,000 cells/mL, at least 1 million cells/mL, or at least 2 million cells/mL.
• the cell density in such prepared cell suspension will have a cell density in the range of 100,000 cells/mL to 100 million cells/mL, more typically in the range of 100,000 cells/mL to 10 million cells/mL, and even more typically 100,000 cells/mL to 5 million cells/mL.
• the prepared trehalose-containing cell suspension can have a cell density in the range of about 0.5 million cells/mL to about 3 million cells/mL.
• the prepared trehalose-containing cell suspension can have a suitable concentration of trehalose, desirably a concentration that inhibits clumping of cells in the cell suspension.
• the prepared trehalose-containing cell suspension will have a trehalose concentration of at least about 0.5%, at least 1%, at least 2%, or at least 3% by weight.
• the trehalose concentration in such prepared cell suspensions will be in the range of about 0.5% to about 20%, more typically in the range of about 1% to about 15%, more typically in the range of about 2% to about 10%, and in certain embodiments about 2.5% to about 8%.
• the prepared trehalose-containing cell suspension will have a trehalose concentration of about 3% to about 4%. It has been discovered that even at relatively low or moderate concentrations as identified herein, trehalose can inhibit cell clumping in the prepared cell suspensions.
• the prepared trehalose-containing cell suspensions can be put to any suitable use, including for example research or therapeutic uses.
• the cell suspension may as examples be administered to a human or animal patient to treat or prevent a disease or condition such as degenerative bone disease, osteoarthritis, rheumatoid arthritis, polyarthritis, systemic lupus erythematosus, inflammatory bowel disease, atopy, hepatitis, chronic steroid responsive meningitis- arteritis, beagle pain syndrome, degenerative myelopathy, chronic renal failure disease, dilated and mitral cardiomyopathy, keratoconjunctivitis sicca, immune mediated non-erosive arthritis, immune mediated hemolytic anemia, immune mediated thrombocytopenia, Evans syndrome, intervertebral disc disease, muscle fibrosis secondary to disease or trauma, refractory corneal ulcer, diabetes mellitus, spinal trauma, eosinophilic granuloma complex, hypertrophic
• rhabdomyolysis corneal ulcer, eczema, multiple sclerosis, muscular dystrophy, spinal injury, diabetes mellitus, hepatitis, myocardial infarction, congestive heart failure, or muscle fibrosis.
• the cell suspension can be administered to a patient in any suitable manner.
• the cell suspension is delivered systemically into the bloodstream of a patient, for example by delivery into a vein or artery.
• the cell suspension is delivered topically to the patient (e.g. in the treatment of atopy or other skin disorders).
• the cell suspension is delivered to a local implant site in a patient. Any of these or any combination of these modes of administration may be used in the treatment of a patient.
• a first amount of a trehalose-containing cell suspension herein can be delivered systemically into the bloodstream of a patient, and a second amount of a trehalose-containing cell suspension herein (e.g.
• a trehalose-containing cell suspension as described herein can be made in some embodiments, while in others multiple separate administrations of trehalose-containing cell suspensions as described herein may be made over time (e.g. weekly or monthly administrations).
• the cell suspension can be filtered prior to administration to the patient, e.g. to remove any clumps of cells that may be present.
• the cell suspension can be passed through an in-line filter positioned in tubing through which the cell suspension is passed into the blood stream of the patient, e.g. into a vein or artery of the patient.
• a filter can, in certain variants, have a particle size cutoff of about 200 micrometers (i.e. exclude from passage particles having a maximum cross-sectional dimension of greater than about 200 micrometers) or lower, or a particle size cutoff of about 170 micrometers or lower, or a particle size cutoff of about 100 micrometers or lower, while allowing the passage of singly suspended cells through the filter.
• Additional embodiments herein include products useful in preparing trehalose-containing cell suspensions as described herein.
• an aqueous medium containing trehalose useful for preparing trehalose- containing cell suspensions.
• the aqueous medium containing trehalose can contain those components, and in amounts, as specified herein.
• the aqueous medium containing trehalose can be provided in sterile form in a container that is included in the kit. That container may be a vial, bag or other container.
• the container has the features of the "second container" discussed hereinabove in which the trehalose-containing cell suspension can be prepared, including for example having an inlet port or other member (e.g.
• Kits disclosed herein may include the container containing the trehalose-containing aqueous medium along with one or more additional components, for example including but not limited to a liquid transfer device such as a syringe and attached or attachable needle, and potentially also a container containing the cell composition to be used to prepare the trehalose- containing cell suspension.
• the container containing the cell composition can include the composition in a cryopreserved state (e.g. shipped frozen with the kit) or in a non-cryopreserved (e.g. thawed where the cells were previously
• Kits disclosed herein may also include at least one filter, for example a filter as described above, through which a prepared trehalose-containing cell suspension can be passed prior to administration into a patient, and/or tubing through which the cell suspension can be passed during administration to the patient.
• a filter for example a filter as described above, through which a prepared trehalose-containing cell suspension can be passed prior to administration into a patient, and/or tubing through which the cell suspension can be passed during administration to the patient.
• the cells used in this Example were purified mesenchymal stem cell populations obtained from canine uterine tissue (from passage 5). The cells were frozen in cryovials in 2% DMSO in VetStarch. The frozen cell samples were provided as 2 mL aliquots with a cell density of 10 million cells/mL. Cells from 3 different canine donors were included n the testing, labeled herein as Donorl ; Donor2 and Donor3.
• Cryo vials containing the cells were thawed in a 37°C water bath until ice crystals just thawed.
• Cells were drawn out of the vial through a needle septum of the vial with an 18 gauge needle and slowly added to the bag through a needle septum of the bag so as not to lyse the cells.
• the vial was then washed with saline and this wash volume was also carefully injected into the bag through the needle septum.
• the bags were then monitored and the condition of the cells was observed for between 10 to 80 minutes.
• the cells were carefully removed from the bag with a syringe and 18 gauge needles. This volume was carefully placed in a 50mL conical flask. It was mixed to ensure even distribution of cells, then mixed 1 : 1 with trypan blue and counted to determine viability. The volume was then centrifuged at 400g for 5 minutes, supernatant aspirated, and resuspended in 2mL complete media. lmL of this cell suspension was then plated into a T25 flask. 24 hours later, the plates were observed and the condition of the cells noted.

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• 2015
  • 2015-09-29 CN CN201580062294.3A patent/CN107106488A/zh active Pending
  • 2015-09-29 WO PCT/US2015/052950 patent/WO2016069173A2/en not_active Ceased
  • 2015-09-29 JP JP2017536231A patent/JP2017531446A/ja active Pending
  • 2015-09-29 CA CA2962239A patent/CA2962239C/en active Active
  • 2015-09-29 BR BR112017006533A patent/BR112017006533A2/pt not_active Application Discontinuation
  • 2015-09-29 US US14/869,006 patent/US20160089401A1/en not_active Abandoned
  • 2015-09-29 AU AU2015339886A patent/AU2015339886B2/en active Active
  • 2015-09-29 EP EP15854446.0A patent/EP3201319A4/en not_active Withdrawn
• 2021
  • 2021-05-07 US US17/302,633 patent/US20210252155A1/en not_active Abandoned

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