Chemistry: molecular biology and microbiology – Measuring or testing process involving enzymes or... – Involving nucleic acid
Reexamination Certificate
2000-06-01
2004-06-08
Fredman, Jeffrey (Department: 1655)
Chemistry: molecular biology and microbiology
Measuring or testing process involving enzymes or...
Involving nucleic acid
C435S091200, C536S023500, C536S024310, C536S024330
Reexamination Certificate
active
06746839
ABSTRACT:
1. BACKGROUND OF THE INVENTION
Asthma
Asthma is a chronic lung disease characterized by coughing, chest tightness, shortness of breath, and wheezing due to a reversible obstruction of airflow resulting from inflammation and hyper-responsiveness of the airways. An asthma attack is a dangerous overreaction by the immune systems, the lungs pump out mucus and inflammatory molecules, clogging and swelling constricted airways; in severe cases, all airflow is cut off and the attack may be fatal.
In sensitized individuals, inhalation of allergens may produce inflammation of the airway lining, and precipitate a flare-up of asthma. Asthma may also occur as a result of other inflammatory stimuli, such as respiratory tract infections. Individuals who have become sensitized to specific foods may have severely and possibly life-threatening reactions after ingestion of these substances. Asthma, once thought of as a “simple” hypersensitivity reaction, is now known to be a complex condition with a probable spectrum of causes and contributing factors, with airway inflammation as its central attribute.
Allergies contribute to both the incidence and severity of asthmatic symptoms. An allergy (also known as immediate hypersensitivity) is defined as an abnormal sensitivity to a substance which is normally tolerated and generally considered harmless, and for which the triggering event is dose-independent, as opposed to a dose-dependent idiosyncratic reaction to a substance. While all immune responses occur as a result of exposure to foreign substances, allergic reactions are distinct from the protective or enhanced “immunity” conferred by immunizations or natural infection. Only about a quarter of the children with asthma outgrow the condition when their airways reach adult size; for the rest, the condition is a lifelong ordeal. The condition persists, according to a research report published by the American Lung Association, in 85 percent of women and in 72 percent of men. (Journal of Allergy and Clinical Immunology Vol. 96:5 11/96). Asthma is typically characterized as either acute or chronic, although chronic diseases can have acute manifestations.
There were 4,964 deaths from asthma recorded in 1993 in the United States alone. The incidence of asthma mortality in children doubled from 1980 to 1993. Among persons between the ages of 15 and 24 years, the number of deaths rose from 2.5 cases per million in 1980 to 5.2 cases per million in 1993. In 1993, asthma accounted for 342 deaths and approximately 198,000 hospitalization in persons under 25 years of age.
African-Americans account for 21 percent of deaths due to asthma. African-American children are four times more likely to die of asthma than Caucasian children. African-American males between the ages of 15 and 24 have the highest risk of mortality.
A positive family history tends to be one of the strongest risk factors associated with asthma. Positive identification though, can be difficult. Asthma may coexist with other conditions such as congenital abnormalities, infectious conditions, and cystic fibrosis. Additional indicators are considered when the history is atypical or the response to good medical management is poor. Physicians with less experience in the management of this disease may treat these symptoms as an infection, not realizing that the underlying cause is asthma.
The identification of asthma in children relies heavily on the parents' observations for clinical clues. Correct identification requires an asthma and allergy specialist who recognizes the uniqueness of childhood asthma. More subtle signs of asthma, such as chest tightness, may be overlooked, particularly by children. Recurrent or constant coughing spells may be the only common observable symptoms of asthma in young children. Although, demonstration of a favorable clinical response to bronchodilator therapy can help confirm the presence of asthma.
Genetics of the IL-1 Gene Cluster The IL-1 gene cluster is on the long arm of chromosome 2 (2q13) and contains at least the genes for IL-1&agr; (IL-1A), IL-1&bgr; (IL-1B), and the IL-1 receptor antagonist (IL-1RN), within a region of 430 Kb (Nicklin, et al. (1994) Genomics, 19: 382-4). The agonist molecules, IL-1&agr; and IL-1&bgr;, have potent pro-inflammatory activity and are at the head of many inflammatory cascades. Their actions, often via the induction of other cytokines such as IL-6 and IL-8, lead to activation and recruitment of leukocytes into damaged tissue, local production of vasoactive agents, fever response in the brain and hepatic acute phase response. All three IL-1 molecules bind to type I and to type II IL-1 receptors, but only the type I receptor transduces a signal to the interior of the cell. In contrast, the type II receptor is shed from the cell membrane and acts as a decoy receptor. The receptor antagonist and the type II receptor, therefore, are both anti-inflammatory in their actions.
Inappropriate production of IL-1 plays a central role in the pathology of many autoimmune and inflammatory diseases, including rheumatoid arthritis, inflammatory bowel disorder, psoriasis, and the like. In addition, there are stable inter-individual differences in the rates of production of IL-1, and some of this variation may be accounted for by genetic differences at IL-1 gene loci. Thus, the IL-1 genes are reasonable candidates for determining part of the genetic susceptibility to inflammatory diseases, most of which have a multifactorial etiology with a polygenic component.
Certain alleles from the IL-1 gene cluster are known to be associated with particular disease states. For example, IL-1RN (VNTR) allele 2 has been shown to be associated with osteoporosis (U.S. Pat. No. 5,698,399), nephropathy in diabetes mellitus (Blakemore, et al. (1996) Hum. Genet. 97(3): 369-74), alopecia areata (Cork, et al., (1995) J. Invest. Dermatol. 104(5 Supp.): 15S-16S; Cork et al. (1996) Dermatol Clin 14: 671-8), Graves disease (Blakemore, et al. (1995) J. Clin. Endocrinol. 80(1): 111-5), systemic lupus erythematosus (Blakemore, et al. (1994) Arthritis Rheum. 37: 1380-85), lichen sclerosis (Clay, et al. (1994) Hum. Genet 94: 407-10), and ulcerative colitis (Mansfield, et al. (1994) Gastoenterol. 106(3): 637-42)).
In addition, the IL-1A allele 2 from marker −889 and IL-1B (TaqI) allele 2 from marker +3954 have been found to be associated with periodontal disease (U.S. Pat. No. 5,686,246; Kornman and diGiovine (1998) Ann Periodont 3: 327-38; Hart and Kornman (1997) Periodontol 2000 14: 202-15; Newman (1997) Compend Contin Educ Dent 18: 881-4; Kornman et al. (1997) J. Clin Periodontol 24: 72-77). The IL-1A allele 2 from marker −889 has also been found to be associated with juvenile chronic arthritis, particularly chronic iridocyclitis (McDowell, et al. (1995) Arthritis Rheum. 38: 221-28). The IL-1B (TaqI) allele 2 from marker +3954 of IL-1B has also been found to be associated with psoriasis and insulin dependent diabetes in DR3/4 patients (di Giovine, et al. (1995) Cytokine 7: 606; Pociot, et al. (1992) Eur J. Clin. Invest. 22: 396-402). Additionally, the IL-1RN (VNTR) allele 1 has been found to be associated with diabetic retinopathy (see U.S. Ser. No. 09/037472, and PCT/GB97/02790). Furthermore allele 2 of IL-1RN (VNTR) has been found to be associated with ulcerative colitis in Caucasian populations from North America and Europe (Mansfield, J. et al., (1994) Gastroenterology 106: 637-42). Interestingly, this association is particularly strong within populations of ethnically related Ashkenazi Jews (PCT W097/25445).
IL-13 and Asthma
IL13 is a cytokine produced by different T-cell subsets and dendritic cells. It shares many biological activities with IL 4 as both cytokines share the IL 4R alpha chain, which is important in signal transduction, and the IL-13 alpha 1 chain which amplifies this signal (DeWaal, M R and J E deVries “Interleukin 13, pp 427-442 in “The Cytokine Handbook” A. Thomas, Ed, (3rd ed) Academic Press, 1998). IL 13 inhibits inflammatory cytokine production (such as IL-1 beta, TNF alpha, IL
Barnes Peter J.
di Giovine Francesco S.
Duff Gordon W.
Lim Samson
Chakrabarti Arun Kr.
Elrifi Ivor R.
Fredman Jeffrey
Interleukin Genetics Inc.
Kozakiewicz Cynthia A.
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