NZ202259A - Wound healing composition,preparation and uses - Google Patents
Wound healing composition,preparation and usesInfo
- Publication number
- NZ202259A NZ202259A NZ202259A NZ20225982A NZ202259A NZ 202259 A NZ202259 A NZ 202259A NZ 202259 A NZ202259 A NZ 202259A NZ 20225982 A NZ20225982 A NZ 20225982A NZ 202259 A NZ202259 A NZ 202259A
- Authority
- NZ
- New Zealand
- Prior art keywords
- amnion
- preparation
- culture medium
- medium
- ointment
- Prior art date
Links
- 238000002360 preparation method Methods 0.000 title claims description 21
- 230000029663 wound healing Effects 0.000 title claims description 11
- 239000000203 mixture Substances 0.000 title description 17
- 210000001691 amnion Anatomy 0.000 claims description 38
- 239000002609 medium Substances 0.000 claims description 24
- 239000002674 ointment Substances 0.000 claims description 21
- 239000001963 growth medium Substances 0.000 claims description 20
- 206010052428 Wound Diseases 0.000 claims description 19
- 208000027418 Wounds and injury Diseases 0.000 claims description 18
- 238000000034 method Methods 0.000 claims description 14
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 claims description 6
- 238000012258 culturing Methods 0.000 claims description 5
- 229910002092 carbon dioxide Inorganic materials 0.000 claims description 4
- 239000004480 active ingredient Substances 0.000 claims description 3
- 239000007864 aqueous solution Substances 0.000 claims description 3
- 239000001569 carbon dioxide Substances 0.000 claims description 3
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 claims description 2
- 238000005119 centrifugation Methods 0.000 claims description 2
- 230000001804 emulsifying effect Effects 0.000 claims description 2
- 238000001641 gel filtration chromatography Methods 0.000 claims description 2
- 239000007788 liquid Substances 0.000 claims description 2
- 229960003511 macrogol Drugs 0.000 claims description 2
- 239000012188 paraffin wax Substances 0.000 claims description 2
- 239000004599 antimicrobial Substances 0.000 claims 2
- 238000000746 purification Methods 0.000 claims 1
- 210000004027 cell Anatomy 0.000 description 7
- 208000025865 Ulcer Diseases 0.000 description 5
- 230000001464 adherent effect Effects 0.000 description 5
- 239000004033 plastic Substances 0.000 description 5
- 229920003023 plastic Polymers 0.000 description 5
- 150000003839 salts Chemical class 0.000 description 5
- UIIMBOGNXHQVGW-UHFFFAOYSA-M Sodium bicarbonate Chemical compound [Na+].OC([O-])=O UIIMBOGNXHQVGW-UHFFFAOYSA-M 0.000 description 4
- 230000002745 absorbent Effects 0.000 description 4
- 239000002250 absorbent Substances 0.000 description 4
- 231100000397 ulcer Toxicity 0.000 description 4
- JKMHFZQWWAIEOD-UHFFFAOYSA-N 2-[4-(2-hydroxyethyl)piperazin-1-yl]ethanesulfonic acid Chemical compound OCC[NH+]1CCN(CCS([O-])(=O)=O)CC1 JKMHFZQWWAIEOD-UHFFFAOYSA-N 0.000 description 3
- 239000007995 HEPES buffer Substances 0.000 description 3
- 239000002390 adhesive tape Substances 0.000 description 3
- 239000002870 angiogenesis inducing agent Substances 0.000 description 3
- 230000002421 anti-septic effect Effects 0.000 description 3
- 210000004379 membrane Anatomy 0.000 description 3
- 239000012528 membrane Substances 0.000 description 3
- 239000003104 tissue culture media Substances 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 206010063560 Excessive granulation tissue Diseases 0.000 description 2
- 229940064004 antiseptic throat preparations Drugs 0.000 description 2
- 238000003556 assay Methods 0.000 description 2
- 239000012298 atmosphere Substances 0.000 description 2
- 244000309466 calf Species 0.000 description 2
- 239000001913 cellulose Substances 0.000 description 2
- 229920002678 cellulose Polymers 0.000 description 2
- 210000001136 chorion Anatomy 0.000 description 2
- 230000001684 chronic effect Effects 0.000 description 2
- 239000006071 cream Substances 0.000 description 2
- 239000012153 distilled water Substances 0.000 description 2
- 239000000284 extract Substances 0.000 description 2
- 210000002950 fibroblast Anatomy 0.000 description 2
- 210000003953 foreskin Anatomy 0.000 description 2
- 210000001126 granulation tissue Anatomy 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 239000000047 product Substances 0.000 description 2
- 230000001737 promoting effect Effects 0.000 description 2
- 210000002966 serum Anatomy 0.000 description 2
- 235000017557 sodium bicarbonate Nutrition 0.000 description 2
- 229910000030 sodium bicarbonate Inorganic materials 0.000 description 2
- 238000003860 storage Methods 0.000 description 2
- UCSJYZPVAKXKNQ-HZYVHMACSA-N streptomycin Chemical compound CN[C@H]1[C@H](O)[C@@H](O)[C@H](CO)O[C@H]1O[C@@H]1[C@](C=O)(O)[C@H](C)O[C@H]1O[C@@H]1[C@@H](NC(N)=N)[C@H](O)[C@@H](NC(N)=N)[C@H](O)[C@H]1O UCSJYZPVAKXKNQ-HZYVHMACSA-N 0.000 description 2
- 238000012384 transportation and delivery Methods 0.000 description 2
- OMIGHNLMNHATMP-UHFFFAOYSA-N 2-hydroxyethyl prop-2-enoate Chemical compound OCCOC(=O)C=C OMIGHNLMNHATMP-UHFFFAOYSA-N 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 239000012591 Dulbecco’s Phosphate Buffered Saline Substances 0.000 description 1
- 108010010803 Gelatin Proteins 0.000 description 1
- WQZGKKKJIJFFOK-GASJEMHNSA-N Glucose Natural products OC[C@H]1OC(O)[C@H](O)[C@@H](O)[C@@H]1O WQZGKKKJIJFFOK-GASJEMHNSA-N 0.000 description 1
- 206010028980 Neoplasm Diseases 0.000 description 1
- JGSARLDLIJGVTE-MBNYWOFBSA-N Penicillin G Chemical compound N([C@H]1[C@H]2SC([C@@H](N2C1=O)C(O)=O)(C)C)C(=O)CC1=CC=CC=C1 JGSARLDLIJGVTE-MBNYWOFBSA-N 0.000 description 1
- 208000037581 Persistent Infection Diseases 0.000 description 1
- 239000004793 Polystyrene Substances 0.000 description 1
- 239000012506 Sephacryl® Substances 0.000 description 1
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 1
- 208000007536 Thrombosis Diseases 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 230000033115 angiogenesis Effects 0.000 description 1
- 230000002491 angiogenic effect Effects 0.000 description 1
- 239000003242 anti bacterial agent Substances 0.000 description 1
- 229940088710 antibiotic agent Drugs 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000036770 blood supply Effects 0.000 description 1
- 210000004204 blood vessel Anatomy 0.000 description 1
- 201000011510 cancer Diseases 0.000 description 1
- 150000001720 carbohydrates Chemical class 0.000 description 1
- 235000014633 carbohydrates Nutrition 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000000969 carrier Substances 0.000 description 1
- 230000001413 cellular effect Effects 0.000 description 1
- 210000003711 chorioallantoic membrane Anatomy 0.000 description 1
- 239000003636 conditioned culture medium Substances 0.000 description 1
- 239000000356 contaminant Substances 0.000 description 1
- 238000002316 cosmetic surgery Methods 0.000 description 1
- 210000004748 cultured cell Anatomy 0.000 description 1
- 210000003785 decidua Anatomy 0.000 description 1
- LOKCTEFSRHRXRJ-UHFFFAOYSA-I dipotassium trisodium dihydrogen phosphate hydrogen phosphate dichloride Chemical compound P(=O)(O)(O)[O-].[K+].P(=O)(O)([O-])[O-].[Na+].[Na+].[Cl-].[K+].[Cl-].[Na+] LOKCTEFSRHRXRJ-UHFFFAOYSA-I 0.000 description 1
- 235000020776 essential amino acid Nutrition 0.000 description 1
- 239000003797 essential amino acid Substances 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000004108 freeze drying Methods 0.000 description 1
- 239000000499 gel Substances 0.000 description 1
- 239000008273 gelatin Substances 0.000 description 1
- 229920000159 gelatin Polymers 0.000 description 1
- 235000019322 gelatine Nutrition 0.000 description 1
- 235000011852 gelatine desserts Nutrition 0.000 description 1
- 239000008103 glucose Substances 0.000 description 1
- -1 glucose) Chemical class 0.000 description 1
- 238000005469 granulation Methods 0.000 description 1
- 230000003179 granulation Effects 0.000 description 1
- 238000003306 harvesting Methods 0.000 description 1
- 230000035876 healing Effects 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 210000005260 human cell Anatomy 0.000 description 1
- 238000000338 in vitro Methods 0.000 description 1
- 239000012678 infectious agent Substances 0.000 description 1
- 230000036512 infertility Effects 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 230000009545 invasion Effects 0.000 description 1
- 235000015250 liver sausages Nutrition 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 235000010755 mineral Nutrition 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 239000002808 molecular sieve Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 239000002953 phosphate buffered saline Substances 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 229920002223 polystyrene Polymers 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000035755 proliferation Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- XYSQXZCMOLNHOI-UHFFFAOYSA-N s-[2-[[4-(acetylsulfamoyl)phenyl]carbamoyl]phenyl] 5-pyridin-1-ium-1-ylpentanethioate;bromide Chemical compound [Br-].C1=CC(S(=O)(=O)NC(=O)C)=CC=C1NC(=O)C1=CC=CC=C1SC(=O)CCCC[N+]1=CC=CC=C1 XYSQXZCMOLNHOI-UHFFFAOYSA-N 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- URGAHOPLAPQHLN-UHFFFAOYSA-N sodium aluminosilicate Chemical compound [Na+].[Al+3].[O-][Si]([O-])=O.[O-][Si]([O-])=O URGAHOPLAPQHLN-UHFFFAOYSA-N 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 229960005322 streptomycin Drugs 0.000 description 1
- 239000006228 supernatant Substances 0.000 description 1
- 230000001225 therapeutic effect Effects 0.000 description 1
- 210000001519 tissue Anatomy 0.000 description 1
- 230000036269 ulceration Effects 0.000 description 1
- 230000002792 vascular Effects 0.000 description 1
- 239000011782 vitamin Substances 0.000 description 1
- 235000013343 vitamin Nutrition 0.000 description 1
- 229940088594 vitamin Drugs 0.000 description 1
- 229930003231 vitamin Natural products 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K35/00—Medicinal preparations containing materials or reaction products thereof with undetermined constitution
- A61K35/12—Materials from mammals; Compositions comprising non-specified tissues or cells; Compositions comprising non-embryonic stem cells; Genetically modified cells
- A61K35/48—Reproductive organs
- A61K35/50—Placenta; Placental stem cells; Amniotic fluid; Amnion; Amniotic stem cells
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
- A61P17/00—Drugs for dermatological disorders
Landscapes
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Cell Biology (AREA)
- Developmental Biology & Embryology (AREA)
- Veterinary Medicine (AREA)
- Public Health (AREA)
- Engineering & Computer Science (AREA)
- General Health & Medical Sciences (AREA)
- Animal Behavior & Ethology (AREA)
- Pharmacology & Pharmacy (AREA)
- Medicinal Chemistry (AREA)
- Biomedical Technology (AREA)
- Dermatology (AREA)
- Virology (AREA)
- Epidemiology (AREA)
- Immunology (AREA)
- Biotechnology (AREA)
- Reproductive Health (AREA)
- Pregnancy & Childbirth (AREA)
- Bioinformatics & Cheminformatics (AREA)
- Zoology (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
- Organic Chemistry (AREA)
- Medicinal Preparation (AREA)
- Materials For Medical Uses (AREA)
- Medicines Containing Material From Animals Or Micro-Organisms (AREA)
Description
New Zealand Paient Spedficaiion for Paient Number £02259
202259,
Priority Oote(&}: ., 5........
Complete Specification Filed: i*?"*5?
class 4f
=.k„^2KsV^'2- B1 JUL 1983
Publication Date: ■ • • •
P.O« Jouirtslf No: • •«• \2ltk •««••■»
HQ BStlllftBS
Patents Form No. 5 Number
PATENTS ACT 1953 Dated
COMPLETE SPECIFICATION
WOUND HEALING COMPOSITION, METHOD OF PREPARING IT,
AND USES THEREOF
//We JOHNSON & JOHNSON PRODUCTS, INC. a corporation organised under the laws of the State of New Jersey, United States of America of 501 George Street, New Brunswick, New Jersey, United States of America do hereby declare the invention for which //we pray that a Patent may be granted to Rift/us, and the method by which it is to be performed, to be particularly described in and by the following statement:
" 1 " (followed by page la)
202259
fUZ. PATE?jT OFF'tCSj
* 1 8 APR 1934 !'la"
'-■-ic.rr.'LiD
This invention relates to compositions which are useful in the promotion of wound healing and, in particular, to the preparation of such compositions from amnion, for example human amnion.
Wound healing is affected adversely by poor general health and several local factors such as inadequate blood-supply and chronic infections. If direct closure of the wound is impracticable, a healthy granulating wound bed which will close either by marginal epithelialisation or 10 by autografting is desirable. The plethora of creams, powders, solutions and dressings used to promote wound healing indicates the incomplete state of ths knowledge on this subject.
Human amnion has been sporadically used, since at 15 least 1910, to promote the formation of granulation tissues, and lately as a biological dressing for open wounds, including burns end chronic ulceration of the legs. For example, an article by R.N. Matthews et al. in British Journal of Plastic Surgery, (1981) 76-78 discloses
the use of human amnion in the treatment of a severe head burn.
A problem in the use of amnion in promoting wound healing lies in that the supply of sterile amnion is necessarily restricted, being usually obtained from 25 Caesarean deliveries. Stored and desiccated membranes have not been found to offer significant improvements over conventional sterile dressings, but when applied fresh or following preservation in normal saline, amnion appears to offer advantages when compared to other types of 30 dressings.
An article by H. Burgos and W. Fage Faulk, in British Journal of Obstetrics and Gynaecology 1981, 8J3, 294-300 discloses a method of maintaining human amnion in culture, with a view to establishing an amnion bank for subsequent 35 therapeutic use.
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Attempts have also been made to obtain cell free extracts having the ability to stimulate blood vessel proliferation (i.e. angiogenesis) in model systems. For example, Tolbert et al_ disclose in U.S. Specification 5 No. 4,273,871 that they have investigated numerous normal human cell lines for the production of angiogenic factors, but that most such coll linos possessed only poor angiogenic activity, as measured, for example, by the chorioallantoic membrane assay of Auerback et al., Devel. 10 Biol. 41,, 391-394 (1974) , and of Folkman, Cancer Res. 34, 2109-13 and _36, 110-114 (1976). Alternatively, they have found such cell lines difficult to maintain in culture.
It was found, however, that cell lines of human foreskin fibroblasts were able to synthesise the desired 15 angiogenic factors in suitable quantities. Tolbert e£ al. describe a procedure for obtaining cell-free extracts comprising such factors by harvesting cultured cells,
followed by mechanically disrupting the harvested cells.
We have now found that culturing amnion in a culture 20 medium results in growth-promoting factors being released into the culture medium, and that these factors are useful as an aid to wound healing. The above-mentioned article by Burgos and Faulk nowhere suggests that used amnion growth medium, obtained as a waste product in their process, may 25 be used in the treatment of wounds. Similarly, none of the Examples of U.S. Specification No. 4,273,671 suggests that the medium used for culturing foreskin fibroblasts may be a useful source of extracellular angiogenic factors.
Indeed, it is explicitly stated that the culture medium '30 was discarded.
According to the present invention therefore, there is provided a substantially amnion-free composition for use in the treatment of wounds, comprising, or derived from, a culture medium in which amnion, preferably human amnion, 35 has been cultured.
We have found amnion-free compositions according to the present invention to be surprisingly stable to lyophilisation
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and to prolonged storage in the lyophilised state. This stability makes such compositions particuarly useful compared with intact amnion in that they can be stored conveniently and for very long periods until required. 5 In addition, procedures for the preparation of such compositions are very much simpler than procedures involving cellular disruption, such as those described in U.S. Specification 4,273,871.
Preferably the amnion is in the form of sterile 10 amniotic membrane obtained, for example, from a Caesarian delivery.
The amnion may be cultured in any suitable tissue culture medium, preferably buffered at a pH from 7.2 to 7.4. Examples of suitable tissue-culture media are those described by H.J. Morton, In Vitro 6, 89-108 (1970). Such media contain, in various combinations, known essential amino acids, mineral salts, carbon sources such as carbohydrates (e.g. glucose), and vitamins.
The amnion is incubated in an atmosphere containing 20 oxygen, and preferably also containing a relatively small concentration of carbon dioxide, which is preferably less than 5%, for exairple 2.5%.
The membrane may be cultured in one or more culture media, for example it nay be cultured initial.\y for 4 to 25 6 days in a first medium, such as Medium A (as described below), followed by culture in a second medium, such as Medium B (as also described below). Since contaminants from the amnion may be washed out by the culture medium during the first few days of culturing, it is preferred to •30 use subsequent changes of culture medium for treating wounds. Similarly, when two.media are used, it is the second medium which is preferred for use in accordance with the present invention.
After separation from the intact amnion, the culture 35 medium is preferably subjected to centrifugation to remove free cells, and is preferably lyophilised for convenience of storage. The lyophilisate may be sterilised, for
f -
M.Z. PATENT OFffiCBj ^ q ^ ^ ^
IS APR 5984 4 - A - ...
fccbvxd example by >f -irradiation, e.g. from a Cesium-90 source.
When required for use, the lyophilisate, in the form of a dry, or substantially dry powder, may be reconstituted by the addition of sterile distilled water.
We hove found that a preparation which is particularly active in the chorionll antoicmcmbrance assay mentioned above may be prepared by gel filtration chromatography of the reconstituted lyophilisnte on a molecular sieve of relatively large pore-size, such as Sephacryl 300. 10 According to a second aspect of the present invention,
there is provided a surgical dressing comprising substantially amnion-free growth promoting-factors derived from the culture of amnion, for example a surgical dressing which has been treated with the above-mentioned 15 substantially amnion-free composition. Such a dressing may be impregnated with the composition in a liquid medium, and then may be dried. Alternatively, for example, the composition may be absorbed in a wound-feeing layer of a surgical dressing. The dressing may also comprise an 70 antiseptic.
According to a further aspect of the present invention, there is provided an ointment, for example, a water-based cream, comprising ernnion-free growth promoting factors derived from \he culture of amnion. The ointment may be 25 based on well-known recipes such as described in the British Pharmacopoeia, 19G0, pages 696-702, for example emulsifying ointment, macrogol ointment, or paraffin ointment. It may also be absorbed as aqueous solution into a hydrophilic gel, ' based on for example, poly-2-hydroxyethyl acrylate, gelatin 30 or the polymers described in British Patent Specification No.1,524,099.
The ointment may also comprise other active ingredients, such as antiseptics. The inclusion of antiseptics in the ointment may reduce the dose of «5"-radiation which is re-35 quired to maintain the sterility of the made-up ointment.
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NZ. PATENT OFP.CS' '> p. o C o
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18 APR 1984
. 5 . RECEIVED
The ointment may be applied directly to the wound bed end should preferably be covered with a non-adherent wound dressing such as tulle gras dressing. If the non-adherent dressing chosen is not absorbent, it may be desirable to 5 cover it with a conventional absorbent material, such as pulped cellulose. This, in turn, may be covered with a conventional occlusive film. The occlusive film may be secured by adhesive tape.
A dressing comprising a non-adherent layer coated with 10 ointment, an absorbent layer and an occlusive film may be pre-packed in a sterileenvelope.
We also provide a method of treating a wound as an aid to healing said wound, comprising applying to the wound the substantially amnion-free composition in accordance with the 15 present invention. The composition may for example be applied alone, or in or on a suitable carrier. Examples of suitable carriers are the dressing and the ointment described above. Alternatively, the wound may be continuously or intermittently irrigated with the composition in in the method
the form of an aqueous solution, as/described by Westaby et al in Annals R.C.S. Eng. (1981) £2. PP 353-356.
Also provided by the present invention is a method of preparing a wound healing composition comprising culturing amnion in a culture medium, separating the medium from the 25 amnion, separating the medium from any free amnion cells and/or lyophilising the medium.
A composition according to the present invention, and a method for making the same will now be described by way of example.
EXAMPLE
Human amnions were collected aseptically from elective Caesarean sections in normal women at term. The membranes were transported in ice-cold minimal essential medium with Hank's salts supplemented with 5% foetal calf serum (FC5) or 35 newly born calf serum (NBCS) buffered to pH 7.4 with HEPES and arrived in the laboratory 1 to 2 hours after collection. These were immediately washed in four changes of Dulbecco's phosphate buffered saline
(PBS), pH 7.35 and cleaned of blood clots and decidua remaining on the chorionic surface by means of gauze-swabs and lung-grasping forceps. Gentle handling prevented the detachment of amnion from the attaching chorion. Large pieces of amnion (between 120 x 120 mm and 24 0^^ 240 mm) were cut with scissors and spread, chorion/aown into 243 x 243 x 16 mm polystyrene dishes, leaving the chorion-supported amnion in 150 to 200 ml of culture medium. Tissue culture medium 199 with Hank's salts supplemented with 10 per cent FCS or NBCS,
buffered to pH 7.2 to 7.4 with 4 mM sodium bicarbonate and 20 mM HEPES (Medium A) was used for the first 4 to 6 days and this was subsequently changed to Earle's salts with 10 mil sodium bicarbonate and 20 mM HEPES (Medium B). Antibiotics were added (pencillin G 100 units/ml and streptomycin 100 jjg/ml) and the cultures were incubated at 37°C in a humid atmosphere (98 per cent humitidy) of 0.5 per cent and 2.5 per cent C02 in air for medium containing Hank's and Earle's salts, respectively. -These CC>2 concentrations were adequate to maintain the media at pH 7.2 - 7.4. The medium was changed after 24 hours and then two or three times a week.
The removed medium B was pooled and then centrifuged at 30,000 g at 4lC to remove any free amnion cells. The clear supernatant was then lyophilised, and sterilised by ^-irradiation from a Cesium-90 source.
The lyophilisate was stored at -20°C until required for use, when it was reconstituted by addition of sterile distilled water.
A method of treatment of wound according to the present invention and surgical dressings for use in such treatment of wounds, will now be described, by way of example, with reference to the accompanying drawings in which
Fig. 1 is a plan view of a dressing,
Fig. 2 is a section on line A-A of Fig. 1, and
Fig. 3 is a sectional view of an alternative dressing
1 8 APR 1934
Referring to the drawings, a layer of tulle gras 1 was laid over the ulcer bed of each of a number of patients suffering from chronic ulcers. A layer of surgical gauze 3 saturated with reconstituted lyophilisate was laid over the tulle gras 1 and then the gauze 3, together with 5 a small area of surrounding tissue, was covered with a plastics sheet 5. A tube 7, having an end portion 9 provided with a number of perforations 11, was introduced between the tulle gras 1 and the gauze 3. The free end 13 of the tube 7 was left protruding from the edge of the 10 plastics sheet. The edge of the plastics sheet was then fixed to the patient's skin using adhesive tape 15, in order to form a fluid-tight seal between the plastics and the skin. In this way, the ulcer was enclosed in an envelope to which fluid access was available only via 15 the tube 7. To start the treatment, 50 ml of reconstituted lyophilisate was introduced into the interior of the envelope by means of a syringe 17 attached to the tube 1, after which the tube was clamped. Every 6 hours for the first 48 hours and every 12 hours for three days 20 thereafter, the contents of the envelope were removed by syringe, and replaced by 50 ml of fresh reconstituted lyophilisate.
A control group of patients was treated in identical fashion, except that the reconstituted lyophilisate was 25 prepared from Medium B which had been incubated in the absence of amnion.
On removal of the dressings of patients treated with aran ion-conditioned medium, a vascular neogenic (or granulation) response was observed. A successful auto-30 graft was then performed on each such patient.
In contrast, the ulcers of the control patients were found to lack sufficient granulation tissue to support a successful autograft.
A dressing for use in administering a wound-healing 35 composition in the form of an ointment is shown in Fig. 3. A wound bed 21 is covered with ointment 23 comprising the 1.
o r\ o n tz O
, , L. U C L. J '
^ '• '
reconstituted lyophilisate described above in a slow-release matrix. A non-adherent dressing 25 is laid over the ointment 23, and the non-adherent dressing is, in turn, covered v:ith a layer of absorbent cellulose pulp 27. 5 The entire dressing is protected from invasion by infectious agents by means of an occlusive, plastics film 29 which is attached to the patient's skin using adhesive tape 31.
202259
Claims (21)
1 . A substantially, amnion-free preparation for use in the treatment of wounds, comprising or derived from a culture medium in which amnion has been cultured and wherein said culture medium has been subjected to cent-rifugation to remove free cells.
2. A preparation according to Claim 1 comprising said culture medium in a lyophilised state.
3. A preparation according to Claim 2 which has been sterilised by '^'-irradiation.
4. A preparation according to any preceding claim, the active fraction of which has been subjected to purification by gel-filtration chromatography.
5. A preparation according to any preceding claim, the. culture medium having been buffered during the culture of said amnion at a pH from 7.2 to 7.4.
6. A preparation according to any preceding claim, the culture medium having contained carbon dioxide at a concentration of less than 5% by weight during the culture of said amnion.
7. A preparation according to Claim 6, said culture medium having contained carbon dioxide at a concentration of substantially 2.5% by weight.
8. A preparation according to any preceding claim wherein the amnion has previously been cultured in a preliminary culture medium for 4 to 6 days, and said preparation consists of, or is derived from a subsequent culture medium.
9. A preparation according to claim 8, wherein said preliminary culture medium is medium A as hereinbefore described, and said subsequent culture medium is medium B as hereinbefore described. N.2. PATENT I - 10 - 202259
10. A surgical dressing including a preparation according to any preceding claim.
11. A dressing according to claim 10 which has been impregnated with the preparation in liquid form and then dried.
12. A dressing according to Claim 10 wherein the preparation is absorbed in a wound-facing layer of the dressing.
13. A dressing according to any of claims 10 to 12 which also includes an antimicrobial agent.
14. An ointment comprising a preparation according to any of Claims 1 to 9.
15. An ointment according to Claim 14 which ointment is an emulsifying ointment, a macrogol ointment or a paraffin ointment, or is absorbed as an aqueous solution into a hydrophilic gel.
16. An oinment according to Claim 14 or 15 which also comprises one or more other active ingredients.
17. An ointment according to Claim 16 wherein said one or more other active ingredients consists of or includes an antimicrobial agent.
18. A method of preparing a wound healing preparation comprising culturing amnion in a culture medium, separating the medium from the amnion, and then separating the medium from any free amnion cells and/or lyophilising the medium.
19. A method of preparing a wound healing preparation, substantially as hereinbefore described with reference to the Example.
20. A substantially amnion-free preparation for use in the treatment of wounds, substantially as hereinbefore described with reference to the Example.
21. A surgical dressing according to claim 10 substantially as hereinbefore described with reference to the accompanying drawings. per; ATrrn.RM'FYS FOR THF a DDI i^amt
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB08133375A GB2110531B (en) | 1981-11-05 | 1981-11-05 | Wound healing composition prepared from amnion |
Publications (1)
Publication Number | Publication Date |
---|---|
NZ202259A true NZ202259A (en) | 1985-07-31 |
Family
ID=10525651
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
NZ202259A NZ202259A (en) | 1981-11-05 | 1982-10-21 | Wound healing composition,preparation and uses |
Country Status (7)
Country | Link |
---|---|
JP (1) | JPS5888316A (en) |
AT (1) | ATA402782A (en) |
AU (1) | AU9010382A (en) |
DE (1) | DE3240909A1 (en) |
GB (1) | GB2110531B (en) |
NZ (1) | NZ202259A (en) |
ZA (1) | ZA828111B (en) |
Families Citing this family (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB8708009D0 (en) * | 1987-04-03 | 1987-05-07 | Clayton Found Res | Injectable soft tissue augmentation materials |
GB8803697D0 (en) * | 1988-02-17 | 1988-03-16 | Deltanine Research Ltd | Clinical developments using amniotic membrane cells |
WO1991000098A1 (en) * | 1989-06-23 | 1991-01-10 | Kishinevsky Selskokhozyaistvenny Institut Imeni M.V.Frunze | Anti-inflammatory preparation and method of obtaining it |
EP0735135A3 (en) * | 1995-03-31 | 1997-12-29 | DIZG Deutsches Institüt für Zell- und Gewebeersatz gGmbH | Cell sheets and transport system for cell sheets |
DE19925549B4 (en) * | 1999-06-04 | 2004-12-23 | Lts Lohmann Therapie-Systeme Ag | Process for the aseptic preparation of wound dressings and use thereof |
EP1549328A4 (en) * | 2002-09-18 | 2009-07-08 | Emiliano Ghinelli | Use of a human amniotic membrane composition for prophylaxis and treatment of diseases and conditions of the eye and skin |
EP1556063A2 (en) * | 2002-10-04 | 2005-07-27 | TissueTech, Inc. | Retinal pigment epithelial cell cultures on amniotic membrane and transplantation |
CN103361300B (en) * | 2005-03-31 | 2015-04-01 | 斯丹姆涅恩有限公司 | Conditioned medium for making highly-purified amnion-derived cell compositions |
GB0514567D0 (en) * | 2005-07-15 | 2005-08-24 | Univ Nottingham | Surgical membrane |
US8871198B2 (en) * | 2006-03-29 | 2014-10-28 | Stemnion, Inc. | Methods related to wound healing |
US20090004161A1 (en) | 2007-06-26 | 2009-01-01 | Palladino Linda O | Methods for treating pustular conditions of the skin |
US20120121547A1 (en) * | 2010-09-16 | 2012-05-17 | Wagner Donald J | Methods and compositions for treating chronic wounds |
-
1981
- 1981-11-05 GB GB08133375A patent/GB2110531B/en not_active Expired
-
1982
- 1982-10-21 NZ NZ202259A patent/NZ202259A/en unknown
- 1982-11-03 AU AU90103/82A patent/AU9010382A/en not_active Abandoned
- 1982-11-04 AT AT0402782A patent/ATA402782A/en not_active IP Right Cessation
- 1982-11-04 ZA ZA828111A patent/ZA828111B/en unknown
- 1982-11-04 JP JP57192628A patent/JPS5888316A/en active Pending
- 1982-11-05 DE DE19823240909 patent/DE3240909A1/en not_active Ceased
Also Published As
Publication number | Publication date |
---|---|
GB2110531B (en) | 1985-05-01 |
DE3240909A1 (en) | 1983-05-11 |
ATA402782A (en) | 1985-06-15 |
JPS5888316A (en) | 1983-05-26 |
ZA828111B (en) | 1984-06-27 |
AU9010382A (en) | 1983-05-12 |
GB2110531A (en) | 1983-06-22 |
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