WO2015047729A1 - METHODS OF USE OF SECRETORY IgA - Google Patents

METHODS OF USE OF SECRETORY IgA Download PDF

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Publication number
WO2015047729A1
WO2015047729A1 PCT/US2014/054903 US2014054903W WO2015047729A1 WO 2015047729 A1 WO2015047729 A1 WO 2015047729A1 US 2014054903 W US2014054903 W US 2014054903W WO 2015047729 A1 WO2015047729 A1 WO 2015047729A1
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Prior art keywords
dermatitis
individual
iga
ulcerative
inflammation
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PCT/US2014/054903
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English (en)
French (fr)
Inventor
Mark E. Cook
Jordan Marshall SAND
Lisa Ann KRUGNER-HIGBY
James Mukasa NTAMBI
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Wisconsin Alumni Research Foundation
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Priority to EP14772520.4A priority Critical patent/EP3049436B1/en
Priority to BR112016006244-2A priority patent/BR112016006244B1/pt
Priority to ES14772520T priority patent/ES2913336T3/es
Priority to CA2924276A priority patent/CA2924276C/en
Priority to CN201480052460.7A priority patent/CN105612177B/zh
Publication of WO2015047729A1 publication Critical patent/WO2015047729A1/en

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    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07K—PEPTIDES
    • C07K16/00—Immunoglobulins [IGs], e.g. monoclonal or polyclonal antibodies
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K39/00—Medicinal preparations containing antigens or antibodies
    • A61K39/395—Antibodies; Immunoglobulins; Immune serum, e.g. antilymphocytic serum
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K39/00—Medicinal preparations containing antigens or antibodies
    • A61K2039/505—Medicinal preparations containing antigens or antibodies comprising antibodies
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07K—PEPTIDES
    • C07K2317/00—Immunoglobulins specific features
    • C07K2317/10—Immunoglobulins specific features characterized by their source of isolation or production
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07K—PEPTIDES
    • C07K2317/00—Immunoglobulins specific features
    • C07K2317/50—Immunoglobulins specific features characterized by immunoglobulin fragments
    • C07K2317/52—Constant or Fc region; Isotype

Definitions

  • the present disclosure is related to methods of use of secretory IgA to treat certain inflammatory conditions in humans and animals, particularly dermatitis, including atopic and ulcerative dermatitis.
  • Dermatitis is a general term that describes an inflammation of the skin.
  • Atopic dermatitis for example, is a pruritic inflammatory skin disorder that affects human children and adults, as well as animals. It is believed that in atopic dermatitis, exposure to irritants and allergens involves both immunological and inflammatory pathways, resulting in skin lesions and pruritus. In humans, atopic dermatitis is sometimes called atopic eczema.
  • Atopic dermatitis in infants, also called infantile eczema causes an increase in the tendency to develop asthma and allergic reaction later in life, a progression called the atopic march.
  • atopic dermatitis also presents as pruritus, evidenced by scratching, and chewing, rubbing, or licking the face and feet.
  • Hot spots in dogs also known as moist dermatitis, are localized spots of skin inflammation that are a source of great agitation for dogs, causing the dog to become fixated on the itchy spot, bothering it constantly until a wound develops. Often hot spots become infected and require treatment with antibiotics.
  • cats can also suffer from atopic dermatitis and hot spots.
  • UD Ulcerative dermatitis
  • B6 C57BL/6
  • a method of preventing and/or treating inflammation in a barrier surface structure in an individual in need thereof comprises orally administering to the individual an anti-inflammatory amount of secretory IgA.
  • a method of preventing and/or treating ulcerative dermatitis in a C57BL/6 background laboratory mouse comprises orally administering to the C57BL/6 background laboratory mouse an anti-inflammatory amount of secretory IgA.
  • a dog or cat food additive comprising an excipient and secretory IgA.
  • Figure 1 shows the specificity of created anti-murine IgA egg antibodies using horseradish peroxidase (HRP)-conjugated anti-murine IgA egg antibody in an ELISA.
  • HRP horseradish peroxidase
  • Mouse IgA was attached to plates which were then tested using one of three treatments: 1) HRP-conjugated anti-murine IgA egg antibody only (HRP; dotted line), 2) HRP-conjugated anti-murine IgA egg antibody plus anti-murine IgA egg antibody that was unlabeled (HRP with competition; solid line), and 3) HRP-conjugated anti-murine IgA egg antibody plus unlabeled control nonspecific egg antibody (HRP with control antibody; dashed line).
  • HRP HRP-conjugated anti-murine IgA egg antibody only
  • HRP with competition HRP with competition
  • HRP-conjugated anti-murine IgA egg antibody plus unlabeled control nonspecific egg antibody HRP with control antibody; dashed line
  • Figure 2 shows the base luminal secretory IgA in control and SCDT " mice quantified using an ELISA involving the anti-murine IgA egg antibodies described in Figure 1. There is a statistically significant increase in the amount of luminal IgA in the SCDT " mice. * P ⁇ 0.07.
  • FIG 3 shows ulcerative dermatitis (UD) scores for SCD ⁇ ⁇ mice fed a semipurified casein-based diet supplemented with crude swine intestinal mucosa containing SIgA.
  • the reported numbers are an average of the weekly total UD score/number of days/ the number of animals.
  • There is a significant decrease in UD scores from week one to week six in the mice consuming crude swine intestinal mucosa. * P ⁇ 0.05.
  • Figure 4 shows scratching data for the control animals and SCD ⁇ ⁇ mice fed a semipurified casein-based diet supplemented with crude swine intestinal mucosa.
  • the presented data are an average of the weekly total number of scratches/the number of days/ the number of animals. There is no significant difference between the control or crude swine intestinal mucosa.
  • Figure 5 shows UD scores for SCD ⁇ ⁇ mice fed a semipurified casein-based diet supplemented with purified swine secretory IgA.
  • SIgA Secretory IgA
  • SIgA is an immunoglobulin with diverse antigen binding activity. When SIgA is released from the intestinal mucosa to the external environment, it forms immune complexes with pathogens and commensal gut flora, food antigens and allergens, thereby preventing them from binding to and penetrating the intestinal mucosa. SIgA acts as an anti-inflammatory molecule by blocking immune cell-antigen interactions. In fact, SIgA deficiency is the most common human immunodeficiency. Reported clinical manifestations of SIgA deficiency in humans include respiratory infections, gastrointestinal disorders, and allergic disorders including atopic dermatitis.
  • SIgA in the intestinal tract is linked to skin disorders.
  • dermatitis it was particularly unknown if orally administered SIgA, which is located in the lumen of the intestine, would effectively bind microbial and/or food antigens related to dermatitis, preventing their leakage into the circulation and interaction with immune cells in the skin. It has been unexpectedly shown by the inventors herein that orally administered SIgA can be used to prevent and reverse ulcerative dermatitis as well as other inflammatory conditions.
  • a mouse model for the induction of dermatitis that leads to ulcerative dermatitis was used to study the effects of secretory IgA on dermatitis.
  • stearoyl CoA-desaturase global knock-out mice placed on a semipurified casein-based diet develop nearly 100% dermatitis.
  • the inventors discovered that feeding purified swine SIgA extracted from the intestinal contents of swine or a dried mucosal preparation containing SIgA to SCD ⁇ ⁇ mice on a dermatitis-inducing diet resulted in a reduction in the development of ulcerative dermatitis. The reduction in ulcerative dermatitis was dose-dependent. While 100% of the control mice developed dermatitis, only 50%) of the mice fed 0.33 grams and 14% of the mice lgram of SIgA/Kg diet developed dermatitis.
  • mice that had already developed ulcerative dermatitis were fed 1 gram SIgA (or mucosa containing SIgA, with the same LPS-binding capacity as 1 gram pure SIgA).
  • SIgA or mucosa containing SIgA, with the same LPS-binding capacity as 1 gram pure SIgA.
  • the symptoms of ulcerative dermatitis were dramatically reduced or eliminated in all four of the treated mice that had ulcerative dermatitis.
  • barrier surface structures in an individual are those cells, secretions, and matrices that prevent the translocation of environmental antigens to systemic processes. Barrier surface structures are found in the eye, ear, skin, intestine, airways, reproductive tract, and urinary tract. SIgA is an anti-inflammatory immunoglobulin secreted from these barrier structures to the surface of the environment or into the associated milieu (e.g., intestinal lumen content and urine). Research shows that dysfunction in one barrier surface structure can induce inflammation in another due to antigen translocation and/or immune interaction at another barrier surface structure.
  • a method of preventing and/or treating inflammation in a barrier surface structure in an individual in need thereof comprising orally administering to the individual an anti-inflammatory amount of secretory IgA.
  • the SIgA can be administered directly to the intestinal barrier surface structure thereby protecting the intestinal barrier surface structure or another barrier surface structure (e.g., the skin).
  • the secretory IgA can be orally administered as a pharmaceutical composition or as a food composition.
  • the term individual includes humans and animals, including non-human mammals and non-mammalian species. Exemplary non-human mammals include dogs, cats, mice and rats including laboratory animals, nonhuman primates, pigs, sheep, cattle, and horses. Exemplary non-mammalian species include chickens, turkeys, and ducks that have dermatitis, as well as amphibians and fish with ulcerative skin disease.
  • the term anti-inflammatory amount means an amount of orally administered SIgA that can prevent and/or reduce inflammation of a barrier surface structure in the target species.
  • the term prevent inflammation means to reduce the incidence of at least one symptom of an inflammatory disorder characterized by inflammation of a barrier surface structure in an individual at risk of developing the inflammatory disorder, that is, an individual not evidencing all of the symptoms of the inflammatory disorder at the time of SIgA administration. For example, an individual may evidence scratching without further evidence of inflammatory disorders.
  • the individual Upon SIgA treatment, the individual will exhibit relief from the worst evidence of pruritus (itching) and the worst consequences such as self-trauma and ulcerative dermatitis would be prevented.
  • an animal at risk of developing an inflammatory disorder characterized by inflammation of a barrier surface structure with accompanying pruritus is a C57BL/6 background laboratory mouse, or a dog or cat that is prone to developing hot spots. Because C57BL/6 background laboratory mice and dogs/cats prone to hot spots are known to be extremely susceptible to barrier surface inflammation, treatment of such animals in the absence of visible signs of inflammation may be warranted to prevent future inflammatory flare-ups.
  • the term "treat” or "reduce” inflammation means a visible and/or measurable reduction in at least one symptom of the inflammatory disorder characterized by inflammation of a barrier surface structure. For example, for an individual with ulcerative dermatitis, a reduction in symptoms means a lessening of the severity and/or frequency of ulcerative lesions and/or pruritus.
  • Anti-inflammatory amounts of secretory IgA can be determined by one of ordinary skill in the art. Exemplary amounts are 0.01 to 25 g/kg food, specifically 1 to 10 g/Kg food or 1 to 1000 mg/Kg body weight.
  • Inflammatory disorders are conditions that involve inflammation that can affect many barrier surface structures of the body.
  • Inflammatory disorders characterized by inflammation of a barrier surface structure include dermatitis; disorders characterized by gastrointestinal inflammation such as inflammatory bowel disease, ulcerative colitis, Crohn's disease; and lymphocytic or eosinophilic gastroenteritis; ocular inflammatory disorders; and inflammatory airway disorders such as asthma and allergy.
  • Dermatitis an inflammation of the skin, while chronic dermatitis is persistent dermatitis with symptoms that generally lasts weeks, months or years.
  • Chronic dermatitis includes atopic dermatitis (also called atopic eczema), chronic actinic dermatitis, ulcerative dermatitis, allergic contact dermatitis, irritant contact dermatitis, and psoriasis.
  • atopic dermatitis also called atopic eczema
  • chronic actinic dermatitis ulcerative dermatitis
  • allergic contact dermatitis irritant contact dermatitis
  • psoriasis psoriasis.
  • the individual with dermatitis suffers from skin lesions that are resistant to healing.
  • Atopic dermatitis is a pruritic, inflammatory skin disorder that affects human children and adults, as well as animals. Atopic dermatitis leads to scratching, redness, flaky skin, raised bumps, rashes, and open lesions. In humans, atopic dermatitis often appears on the arms, the hands, the feet, the upper chest and behind the knees, although it can appear in other locations. Atopic dermatitis in humans often appears in childhood and persists through adulthood. A serious problem in patients with atopic dermatitis is that scratching the rash can lead to breaking of the skin barrier, allowing for bacterial infections such as Staphylococcus aureus. Treatments for atopic dermatitis include topical steroids, topical
  • immunosuppressants e.g., tacrolimus and similar compounds
  • antihistamines e.g., tacrolimus and similar compounds
  • antibiotics to treat infections.
  • Infantile eczema is a type of atopic dermatitis that occurs in infants. In some cases, infantile eczema continues through childhood, adolescence, and adulthood. Infantile eczema is generally characterized by an itchy dry rash on the face and scalp. Children with infantile eczema have a high sensitivity to itching and have an increased risk of developing other inflammatory conditions such as asthma and allergies.
  • Atopic dermatitis is also problematic in animals, particularly dogs and cats.
  • Atopic dermatitis usually begins in dogs from 1-3 years of age and, while prevalent in certain breeds, can affect any breed of dog and mixed breed dogs. It is estimated that atopic dermatitis affects 10% of dogs. The disorder is evidenced by itching, licking and face- rubbing, including licking of the paws.
  • "Hot spots" are localized areas of red, moist, hot, irritated skin lesions. Clinically, the lesions appear to be the result of self-trauma. Extreme self-trauma to the affected spot can lead to skin infections, requiring treatment with antibiotics.
  • prednisone oral prednisone
  • many dogs are prednisone-intolerant.
  • prednisone treatment in dogs can lead to excessive thirst, excessive urination, diarrhea, and weight fluctuations.
  • the individual is a prednisone-intolerant dog or a dog for which prednisone is contraindicated due to its side effects.
  • the dog is co-administered a medication that is incompatible with steroid administration.
  • corticosteroid drugs such as prednisone cannot be co-administered with nonsteroidal anti-inflammatory drugs (NSAIDS) such as carprofen or meloxicam because the corticosteroids vastly increase the risk of gastrointestinal bleeding due to the NSAIDS.
  • NSAIDS nonsteroidal anti-inflammatory drugs
  • Chronic actinic dermatitis known as photosensitivity dermatitis or actinic reticuloid syndrome (PD/AR)
  • PD/AR actinic reticuloid syndrome
  • Chronic actinic dermatitis is generally found in men over the age of 50, but women and younger individuals can also be affected.
  • Diagnosis of chronic actinic dermatitis can be challenging because the wavelengths of light involved do not cause sunburn, so individuals can have problems on cloudy days and through clothing and windows.
  • Topical treatments such as topical steroids are the current treatments for this disorder.
  • Ulcerative dermatitis is a severe form of atopic dermatitis characterized by ulcerative skin lesions.
  • UD has been noted as a problem in laboratory mice, particularly C57BL/6 (B6) background mice, than can lead to euthanasia of affected animals, due to enlargement of the ulcer or extreme self-trauma to the affected areas.
  • the individual is a laboratory mouse with a C57BL/6 background.
  • the individual is a cat with feline ulcerative dermatitis, a turkey with focal ulcerative dermatitis, a chicken with gangrenous dermatitis, a pig with porcine ulcerative dermatitis, ulcerative dermatitis in reptiles, and fish and frogs such as Xenopus frogs.
  • Both allergic and irritant contact dermatitis are conditions in which the skin becomes red, sore, itchy and/or inflamed after contact with a substance.
  • Allergic contact dermatitis is caused when the skin comes in contact with a substance with which the individual has become particularly sensitive.
  • Exemplary allergens include fabrics or clothing, adhesives, nickel or other metals, poisonous plants and latex.
  • Irritant contact dermatitis is generally caused by contact with soaps and detergents, laundry soaps and softeners, solvents, and other chemicals. Irritant contact dermatitis can look like a burn.
  • the inflammatory disorder characterized by inflammation of a barrier surface structure is further characterized by chronic gastrointestinal inflammation such as inflammatory bowel disease, ulcerative colitis, and Crohn's disease.
  • Inflammatory bowel disease IBD is a general term for chronic inflammation of all or part of the digestive tract. Ulcerative colitis and Crohn's disease are the most common forms of IBD in humans. IBD is also found in pets such as dogs and cats, and farmed animals (e.g., cattle, sheep chickens, turkeys, ducks, fish species and horses), and is generally characterized by diarrhea and/or vomiting.
  • the individual is a dog or a cat with inflammatory bowel disease.
  • Ulcerative colitis is chronic inflammation of the colon including necrotizing enterocolitis in newborns. Ulcers form where the inflammation has killed the cells that line the colon. Ulcerative colitis can occur in children, but generally begins between ages 15 and 30. The most common symptoms are abdominal pain and bloody diarrhea. The cause of ulcerative colitis is unknown.
  • Crohn's disease is an inflammatory bowel disease that causes inflammation of the lining of the digestive tract, leading to abdominal pain, severe diarrhea and, in extreme cases, malnutrition. The inflammation can penetrate deep into the tissue. There is no known cure for Crohn's disease, and it is commonly treated with anti- inflammatories and immune system suppressors, for example.
  • SIgA serotonin-containing dermatitis
  • Additional populations where prevention of inflammatory disorders is indicated are selective serum IgA- deficient individuals and individuals with allergies, particularly humans with gluten allergies, also called gluten sensitivity.
  • Selective IgA Deficiency is the most common of the primary immunodeficiencies. It is defined as the total absence or severe deficiency of IgA. Blood serum levels for IgA deficient persons are usually found to be 7 mg/dl or less, while serum IgA in normal adults ranges from 90 to 450 mg/dl.
  • the disorder is called "selective" because other serum immunoglobulins, such as IgM and IgG, are present at normal or even increased levels.
  • Recurrent infections, allergies such as asthma and food allergies, and autoimmune diseases are common in selective serum IgA-deficient individuals. Humans with an autoimmune disease are another population for which orally administered SIgA is expected to be beneficial.
  • SIgA used in the methods described herein can be isolated and/or pure SIgA.
  • SIgA can be isolated from humans or animals who have been exposed to a variety of antigens.
  • Isolated or pure SIgA can be isolated or purified from the intestinal luminal fluid or the intestinal mucosa of a pig or a cow, sheep, chicken, turkey, horse, or a human (e.g., from a human cadaver or from the intestinal contents of a living human donor).
  • intestinal luminal fluid is the fluid found within the intestinal lumen of an animal.
  • the lumen is the interior cavity of the intestine where digested food passes through and nutrients are absorbed.
  • the composition of intestinal luminal fluid varies depending on the diet, fed/fasted state and the disease state of the organism.
  • Intestinal luminal fluid contains, for example, lipids; proteins including SIgA; bacteria; ions such as sodium, potassium and calcium; and solid undigested materials.
  • SlgA can be purified to about 98% purity from intestinal luminal fluid.
  • intestinal mucosa refers to the inner wall (luminal lining) of the intestine.
  • the intestine includes an outer wall called the serosa, middle muscle layers, and an interior called the mucosa.
  • isolated protein includes protein molecules that are separated from at least a fraction of the other protein or non-protein molecules present in the natural source of the protein.
  • An isolated protein is free of a substantial amount of the cellular material or other contaminating polypeptides from the cell, tissue, or bodily fluid source from which the protein is derived.
  • Isolated SlgA may have a concentration of SlgA twice the concentration in the source material, that is, twice the concentration of SlgA in source intestinal mucosa or luminal fluid. In other embodiments, isolated SlgA has a concentration three, four, five, ten or more-fold compared to the concentration in the source intestinal mucosa.
  • secretory IgA is isolated from a source that is intestinal mucosa of a pig or a cow, wherein the concentration of secretory IgA in the isolated secretory IgA is at least twice the concentration in the source material, wherein the source material is dried intestinal mucosa, an aqueous preparation of intestinal mucosa, or a dry preparation of proteins prepared from intestinal mucosa.
  • an isolated SlgA preparation is a dry preparation sourced from intestinal mucosa, wherein 5% or more of the proteinaceous material in the isolated SlgA comprises IgA. Without being held to theory, it is believed that there are 5-10 g of SlgA for every 100 g of mucosal protein. In other embodiments, greater than 10, 20, 30, 40, 50, 60, 70, 80, 90 or 95% of the proteinaceous material in the isolated SlgA comprises IgA.
  • SlgA pure with reference to SlgA means that SlgA is isolated and that the SlgA components (IgA and secretory components) comprise greater than 75%, specifically greater than 85% and more specifically greater than 95% of the protein in the sample.
  • Pure SlgA can be prepared from intestinal mucosa or intestinal luminal fluid.
  • the pure SlgA preparation is pasteurized.
  • Pasteurization is a process of heating a liquid to a specific temperature for a defined length of time and then substantially immediately cooling the liquid.
  • the goal of pasteurization is to reduce the number of viable pathogens in a liquid.
  • Exemplary conditions for pasteurization are 50- 100°C for 5-30 seconds or 120-150°C for 1-8 seconds, for shelf stable pasteurization.
  • pasteurization of the SIgA isolated from pig intestinal mucosa can be important in the use of the SIgA preparations to increase feed efficiency in chicks.
  • the pure SIgA composition has secretory IgA
  • LPS lipopolysaccharide binding activity.
  • An indirect ELISA can demonstrate the LPS binding activity.
  • LPS is coated on a microtiter plate. Either intestinal SIgA or serum IgA (a control) is added at various dilutions to the LPS bound on the microtiter plate. After unbound SIgA is removed by washing, the amount of SIgA that bound to the plate bound LPS is detected using an anti-IgA antibody conjugated to an enzyme like horseradish peroxidase plus substrate.
  • the pure, pasteurized SIgA is in the form of a
  • composition comprising a pharmaceutically acceptable excipient.
  • a process for purifying a SIgA composition comprises treating the intestinal luminal fluid of a pig or cow with polyethylene glycol having a molecular weight of 3000 to 30,000, and isolating the precipitated SIgA.
  • the SIgA is enriched at least two-fold compared to the concentration of SIgA in the intestinal luminal fluid.
  • the method further comprises resuspending the precipitated SIgA is in a solution of polyethylene glycol having a molecular weight of 3000 to 30,000 to produce re-precipitated SIgA, and isolating the re-precipitated SIgA.
  • Resuspension and precipitation can be repeated until a pure SIgA composition as described herein is produced.
  • the precipitated SIgA composition is pasteurized as described above.
  • Precipitated pure SIgA can be subjected to additional treatments/purification steps, such as filter sterilization, precipitations using ice cold ethanol (lower than 0°C to dissolve the PEG and leave only the pure protein), desalting. Other procedures for purification such as sodium sulfate precipitations and gamma carrageenan, and size exclusion chromatography.
  • pure or isolated SIgA is prepared from the intestinal mucosa of a pig or a cow.
  • the preparation of pure or isolated SIgA includes lysing the intestinal mucosa, removing debris by centrifugation, for example, and then proteins in the supernatant are sequentially precipitated using various concentrations of polyethylene glycol (3.5-15% w/v) having a molecular weight of 3000 to 30,000, such that the SIgA will be isolated from other proteins in the mucosa preparation.
  • SIgA is in the form of the dried intestinal mucosa of a pig, chicken, turkey, sheep, or cow, wherein the intestinal mucosa is not hydro lyzed.
  • the dried intestinal mucosa contains an amount of SIgA effective to increase growth rate and/or improve feed efficiency in an animal. While pig intestinal mucosa has been used previously as a source of amino acids in animal feeds, the intestinal mucosa was hydro lyzed to reduce the constituent proteins to amino acids or stabilized to reduce microbial growth. Reducing the protein to amino acids or even small peptides destroys the bioactivity of SIgA in the mucosa. Stabilizing mucosa using denaturing agents such as acid (e.g., hydrochloric acid or phosphoric acid) or sodium bisulfite can denature the bioactivity of SIgA.
  • denaturing agents such as acid (e.g., hydrochloric acid or phosphoric acid) or sodium bisulfite can denature the bioactivity of SIgA.
  • Unhydrolyzed and unstabilized, dried pig, chicken, turkey, sheep or cow intestinal mucosa is a useful source of functional SIgA.
  • Unhydrolyzed and unstabilized, dried pig, chicken, turkey, sheep or cow intestinal mucosa can be used, for example, as a supplement in animal feed compositions.
  • the term "unhydrolyzed” means that a preparation has not been treated with enzymes, heat (greater than 90°C) or chemicals under conditions expected to reduce the constituent proteins to amino acids.
  • the term “unhydrolyzed” means that a preparation has not been treated with enzymes, heat (greater than 90°C) or chemicals under conditions expected to reduce the constituent proteins to amino acids.
  • the term “unhydrolyzed” means that a preparation has not been treated with enzymes, heat (greater than 90°C) or chemicals under conditions expected to reduce the constituent proteins to amino acids.
  • the term “unhydrolyzed” means that a preparation has not been treated with enzymes, heat
  • unstabilized means that chemical additives have not been used, at concentrations that inhibit SIgA bioactivity, to inhibit microbial growth.
  • the dried intestinal mucosa is lyophilized, drum dried, or spray dried.
  • SIgA is administered in a food composition.
  • a concentration of greater than 0.1 mg/ Kg basal animal or human food is expected to produce beneficial results.
  • basal food composition refers to a food composition combinable with additives such as the SIgA compositions described herein.
  • Basal food compositions can be suitable for ingestion by a human or an animal.
  • Exemplary food compositions suitable for ingestion by a human include a nutritionally complete formula, a dairy product, a chilled or shelf stable beverage, a soup, a dietary supplement such as a vitamin, a meal replacement, a nutritional bar, confectionery, or other food composition.
  • basal animal food composition refers to an animal food combinable with additives such as the SIgA compositions described herein.
  • Basal animal food compositions may include components such as proteins, grains, flavor compositions, vitamins, minerals, preservatives, and the like.
  • the basal animal food composition is for an avian, porcine, bovine, ovine, capra, fish, reptile, mollusk, invertebrate animal, horse, dog, or cat.
  • the secretory IgA is in the form of a pure, optionally pasteurized secretory IgA composition isolated from the intestinal luminal fluid of a pig.
  • the pure, pasteurized secretory IgA composition comprises greater than 0.1 mg/ Kg basal food composition.
  • the basal animal food composition is for a dog or a cat and wherein the animal food composition includes an anti- inflammatory amount of SIgA.
  • the SIgA is added to a basal food composition in the form of dried intestinal mucosa from a pig or a cow, wherein the dried intestinal mucosa is unhydrolyzed.
  • the concentration is 1 mg/Kg to 10 grams/Kg of the dried intestinal mucosa to the basal animal food composition.
  • the basal food composition is for a dog or a cat and wherein the animal food composition has antiinflammatory efficacy.
  • a dog or cat food additive comprising an excipient and secretory IgA.
  • compositions comprising pure, pasteurized SIgA and a pharmaceutically acceptable excipient.
  • pharmaceutical composition means therapeutically effective amounts of the compound together with a pharmaceutically acceptable excipient, such as diluents, preservatives, solubilizers, emulsifiers, and adjuvants.
  • pharmaceutically acceptable excipients are well known to those skilled in the art.
  • Ulcerative dermatitis affects laboratory mice with a C57BL/6J (B6) background, causing excoriation of the face, ears or dorsal cervicothoracic skin, accompanied by pruritus.
  • SCDT mice, lacking stearoyl Co-A denaturase-1, have decreased expression of genes encoding enzymes used to synthesize lipids and increased expression of genes encoding enzymes that oxidize fatty acids. It has been shown (Krugner-Higby et al,
  • Semipurified diets are derived from single-source components so that the lipid, protein or carbohydrate source can be changed by varying a single component.
  • the NIH AIN76A diet includes corn oil as the lipid source, casein as the protein source, and sucrose and corn starch as the major carbohydrate sources.
  • the AIN76A composition is given in Table 1 :
  • Table 1 Composition of NIH AIN76A diet
  • Control mice are wild type mice with functioning SCD that, when switched to the AIN diet, rarely develop UD.
  • Mucosa is homogenized with up to 50% (of total volume) water to dilute the material and encourage cell lysis. Mucosa can then be filtered using an 800 ⁇ filter and/or centrifuged at 4000 x g for 10 minutes. Mucosa is homogenized using a standard two-stage dairy homogenizer at a final pressure of 2000 psi. Mucosa is pasteurized at 160°F for 20 seconds. Mucosa is spray dried at 2000 psi and 350°F in a standard spray dryer (4-stories in height). Material is tested for activity using ELISA(s) (described below).
  • Luminal fluid from commercially slaughtered pigs was collected. Luminal fluid was combined with 3.5% PEG 8000 w/v (polyethylene glycol 6000-8000 molecular weight) and centrifuged at 14,000 x g, 4°C for 10 minutes. The clarified liquid was collected and filtered through glass wool to remove any remaining fats. The clarified liquid was combined with 8.5% PEG 8000 w/v and centrifuged at 14,000 x g, 4°C for 10 minutes. The supernatant was poured off and the pellet within the tube was resuspended in 12% PEG 8000 w/v in deionized water. The mixture was centrifuged at 14,000 x g, 4°C for 10 minutes. The supernatant was poured off and the remaining pellet was frozen at -80°C and then lyophilized.
  • PEG 8000 w/v polyethylene glycol 6000-8000 molecular weight
  • IgA purity Luminal fluid (fluid collected from within the intestinal tract through a series of rollers that express intestinal contents without disruption of the mucosal lining) demonstrated greater than 90% purity after purification. There was between 193 and
  • Pasteurization was used to eliminate live bacteria from the IgA preparations.
  • a commercial grade pasteurizer from the University of Wisconsin-Madison Dairy Pilot Plant heated the luminal fluid containing IgA to 160°F for 20 seconds, and the material was cooled quickly there-after. There was almost no loss in the amount of IgA and no decrease in the antigen-binding activity of the IgA after pasteurization.
  • Example 1 Developing a capture murine slgA for the purpose of quantifying mouse intestinal lumen slgA: Specificity of anti-murine IgA antibodies
  • murine IgA was purchased from (Bethyl Laboratories, Montgomery TX) and was emulsified with Freund's complete adjuvant and injected into laying hens. Hens were given one week to recover from the vaccination. Commercial murine IgA was emulsified with Freund's incomplete adjuvant and injected into the same laying hens seven days later. Hens were monitored for anti-murine IgA production. Once production was verified using an ELISA, anti-murine IgA egg antibodies were purified using the same PEG procedure as was used for purifying swine SlgA. Anti-murine IgA antibodies were then conjugated to horseradish peroxidase (HRP).
  • HRP horseradish peroxidase
  • Murine IgA was dissolved in coating buffer (1.59 g Na 2 C0 3 , 2.93 g NaHC0 3 , 0.2 g NaN 3 , pH
  • the plates were blocked with protein free blocking buffer (Pierce, Rockford IL) for 1 hour.
  • HRP HRP-labeled anti-murine IgA egg antibodies
  • HRP-labeled and unlabeled anti-murine IgA egg antibodies HRP with competition
  • control or nonspecific egg antibodies HRP-labeled anti-murine
  • IgA egg antibodies HRP with control antibody.
  • the three antibody treatments were added to the plates in 10-fold dilutions from 1 :10-1 : 1,000,000,000 to determine the amount of murine IgA present.
  • the plates were incubated at 21°C for 1 hour. The plates were then washed three times with PBS-0.05% Tween. Plates were washed 6 times with washing buffer.
  • HRP-substrate hydrogen peroxide
  • substrate buffer diethanolamine 97 mL, 100 mg MgCl 2 , 0.2 g NaN 3 , 800 mL ddH 2 0, pH 9.8
  • SCD1 "7" and control C57BL/6 mice were examined for the secretory IgA content of their luminal fluid.
  • three mice were euthanized and the luminal fluid was extracted.
  • a capture ELISA was used to detect murine IgA in the extracted luminal fluid.
  • Unlabeled anti-murine IgA egg antibody from Example 1 was dissolved in coating buffer (1.59 g Na 2 C0 3 , 2.93 g NaHC0 3 , 0.2 g NaN 3 , pH 9.6, 1000 mL total volume) overnight to allow for attachment of the antibody to the Nunc Maxisorp® F plate (Thermo- Fisher Scientific, Rochester NY). The plates were blocked with protein free blocking buffer (Pierce, Rockford IL) for 1 hour.
  • the plates were washed three times with PBS-0.05% Tween (Fisher- Scientific, Pittsburgh PA). Luminal fluid samples from six different mice (3 SCD1 ⁇ ⁇ and 3 control) were added to the plate in 10-fold dilutions from 1 : 10-1 : 1 ,000,000,000 to determine the amount of IgA present. The plates were incubated at 21°C for 1 hour. The plates were washed 3 times with PBS-0.05% Tween. Chicken anti-murine IgA egg antibody labeled with HRP was added in blocking buffer (5 ⁇ ⁇ 2° antibody: 12.5 mL blocking buffer) for 60 minutes. The plates were washed 6 times with washing buffer.
  • Substrate was then added in substrate buffer (diethanolamine 97mL, lOOmg MgCl 2 , 0.2g NaN 3 , 800mL ddH 2 0, pH 9.8), incubated for 15 minutes, and the plates were read at 450nm.
  • substrate buffer diethanolamine 97mL, lOOmg MgCl 2 , 0.2g NaN 3 , 800mL ddH 2 0, pH 9.8
  • histology of the intestines of the ulcerative dermatitis model mice shows an increase in inflammation and decreased submucosal and muscular thickness in the duodenum (data not shown). Without being held to theory, it is believed that the increased IgA in the intestines of the mice with ulcerative dermatitis is due to the increased secretory IgA in the intestines.
  • Example 3 Evaluation of oral administration of crude swine intestinal mucosa as an ulcerative dermatitis prevention and treatment
  • antigens e.g., dietary, microbial or casein
  • SCDT mice on the NIH AIN76A diet
  • mice Six mice were used in the control group and in the test group fed crude swine intestinal mucosa. In the control group there were five mice with no evidence of ulcerative dermatitis, and one control mouse with ulcerative dermatitis. In the test group, there were five mice with no evidence of ulcerative dermatitis, and one mouse with ulcerative dermatitis. Control mice were fed the NIH AIN76A diet supplemented with acidified PBS (phosphate- buffered saline) and test mice were fed the NIH AIN76A diet supplemented with 1 g/kg crude swine oral mucosa in acidified PBS. The mice were monitored daily and weighed weekly.
  • PBS phosphate- buffered saline
  • Table 2 shows the effects of orally administered crude swine intestinal mucosa in the prevention and treatment of ulcerative dermatitis.
  • mice without ulcerative dermatitis at the beginning of the 4 week study 4/5 mice on the control diet developed ulcerative dermatitis, compared with 2/5 mice on the test diet.
  • crude swine intestinal mucosa can prevent ulcerative dermatitis in the mouse model.
  • mice consuming either control (no addition of mucosa material) or crude swine intestinal mucosa were monitored daily for scratching. Each mouse was observed for one minute to determine if they were scratching and how many times during that one minute time frame they did scratch. The reported data is an average of the weekly total number of scratches/the number of days/ the number of animals. As shown in Figure 4, while there was no significant difference between the control animals and the animals fed crude swine intestinal mucosa the first 7 weeks, mice fed mucosa appeared to have less scratching (approximately 30% less) than the controls on week 8.
  • mice were treated with purified swine intestinal secretory IgA.
  • the incidence of ulcerative dermatitis was monitored for 12 weeks. The data is shown in Table 3 :
  • mice with ulcerative dermatitis were fed the NIH AIN76A diet supplemented with lg/kg diet purified swine secretory IgA.

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