diagnosis and management of immunodeficiency in adulthood n.
Download
Skip this Video
Loading SlideShow in 5 Seconds..
Diagnosis and Management of Immunodeficiency in Adulthood PowerPoint Presentation
Download Presentation
Diagnosis and Management of Immunodeficiency in Adulthood

Loading in 2 Seconds...

play fullscreen
1 / 40

Diagnosis and Management of Immunodeficiency in Adulthood - PowerPoint PPT Presentation


  • 99 Views
  • Uploaded on

Diagnosis and Management of Immunodeficiency in Adulthood. Teresa Tarrant, MD Assistant Professor of Medicine Division of Rheumatology, Allergy, and Immunology. The Immune System:. http:// stemcells.nih.gov/info/scireport/chapter6.asp. T cell deficiencies Fungi Viruses Pneumocystis

loader
I am the owner, or an agent authorized to act on behalf of the owner, of the copyrighted work described.
capcha
Download Presentation

PowerPoint Slideshow about 'Diagnosis and Management of Immunodeficiency in Adulthood' - ciaran-shaw


An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -
Presentation Transcript
diagnosis and management of immunodeficiency in adulthood

Diagnosis and Management of Immunodeficiency in Adulthood

Teresa Tarrant, MD

Assistant Professor of Medicine

Division of Rheumatology, Allergy, and Immunology

the immune system
The Immune System:

http://stemcells.nih.gov/info/scireport/chapter6.asp

pattern of infections clinical immunology
T cell deficiencies

Fungi

Viruses

Pneumocystis

B-cell deficiencies

S. pneumococcus

H.influenzae

Enteroviruses

Complement deficiencies

Bacteremia

Meningitis

C5-9: Neisseria

C1/2/4: SLE

Phagocytic disorders

Staph skin infections

Cepacia

Infections of the reticuloendothelial system

Abscesses

Humoral Immunodeficiencies

Pattern of infections: Clinical Immunology

The type of infectious agent and the location of the infection may give valuable insight into the nature of the immunologic defect. . .

clinical scenario recurrent infections
32 yo previously healthy female who has a 3 year history of sinus drainage and recurrent sinus infections. . .

Differential:

Allergies

Chronic sinusitis

Allergic fungal sinusitis

Antibiotic resistance

Mechanical derangement

Clinical Scenario: Recurrent infections
clinical scenario recurrent infections1
32 yo previously healthy female who has a 3 year history of sinus drainage, recurrent sinus infections, who developed bilateral otitis media requiring tympanostomy and IV antibiotics. . . .

Differential

Allergies

Chronic sinusitis

Allergic fungal sinusitis

Antibiotic resistance

Mechanical derangement

Humoral immune deficiency

CF

Primary Ciliary Dyskinesia

Clinical Scenario:Recurrent infections
slide6

Clinical Scenario:Recurrent infections

  • Now it’s the same 32 yo female . . . who develops fevers, increased sputum, and an infiltrate seen on CXR
  • Differential
    • Humoral immune deficiency
    • CF
    • Primary Ciliary Dyskinesia
differential for humoral immune deficiency in adults
Drugs

Antimalarials, captopril, carbamazepine, steroids, gold, penicillamine, phenytoin, sulfasalazine

Systemic disorders

Chronic medical conditions

CF

Sickle Cell

Hypercatabolism of Ig

Excessive loss of Ig

Nephrosis, burns, diarrhea, lymphangiectasia

ID

HIV, EBV

Malignancy

CLL

Immunodeficiency with thymoma (Good’s syndrome)

NHL

CVID

IgA deficiency

IgG Subclass deficiency

Differential for Humoral Immune Deficiency in Adults
common variable immunodeficiency
Common Variable Immunodeficiency
  • Definition: a disease characterized by low levels of immunoglobulins and recurrent sinopulmonary infections.
  • It is a relatively commonimmunodeficiency with variable levels of immunoglobulins and clinical course between patients
slide9
CVID
  • Heterogeneous group of disorders of humoral immunodeficiency with associated bacterial infections, autoimmune disease, and malignancy
  • Bimodal distribution
    • Major peak 25-45 yo
    • Second peak 5-15 yo
  • M=F
  • Prevalence estimated at 1:25,000-50,000
slide10

CVID: Pathogenesis

  • Some molecular defects identified
    • TACI mutation (~20% of CVID)
  • Most cases are sporadic
  • Familial inheritance has been demonstrated
    • X-linked
    • Autosomal recessive
    • Autosomal dominant
cvid genetic
CVID: Genetic
  • Mutations in the genes encoding the tumor necrosis factor (TNF) superfamily receptors
    • TACI mutation
      • Transmembrane activator and calcium-modulating ligand interactor
    • BAFF-R mutation
      • B cell activation factor of the TNF family receptor
  • Small number of patients with CD19 deficiency
taci mutation
TACI mutation
  • TACI is expressed on the surface of B cells
  • TACI interacts with
    • BAFF (activation factor)
    • APRIL (proliferation ligand)

Bacchelli et al. Clin Exp Immunol 2007; 149:1365-2249

  • TACI-deficient mice show ↑ B cells, impaired isotype switching and develop autoimmune manifestations with (SLE)-like symptoms, lymphoproliferation,splenomegaly, and lymphoma
slide13

CVID: Pathogenesis

  • Familial inheritance
    • IgA deficiency
      • Kindreds with IgA deficiency and CVID
      • 15% of patients with CVID have a first degree relative with IgA deficiency
      • Individuals with IgA deficiency who develop CVID
    • MHC haplotypes shown to correlate with CVID and IgA deficiency
slide14

CVID: Pathogenesis

  • Environmental triggers
    • Viral infection
    • Drugs
      • Antimalarials, captopril, carbamazepine, steroids, gold, penicillamine, phenytoin, sulfasalazine
cvid clinical manifestations
CVID: Clinical Manifestations
  • Infectious Disease
    • Recurrent pyogenic sinopulmonary infections
    • Chronic enteroviral infections
    • Meningoencephalitis
    • Chronic Giardia Lamblia
    • Recurrent HSV and/or VZV
slide16

CVID: Clinical Manifestations

  • GI manifestations
    • Sprue-like syndrome (wt loss, diarrhea, vitamin deficiency, hypoalbuminemia)
    • Nodular follicular hyperplasia of the intestines
    • Gastric atrophy, achlorydria
    • Colitis
    • MALT lymphoma
    • Giardiasis
slide17

Nodular Lymphoid Hyperplasia of the Duodenum

Nodules develop through lymphocyte proliferation in the lamina propria and submucosa, but are not directly linked to increased malignant potential.

slide18

CVID: Clinical Manifestations

  • Autoimmune manifestations (22-50%)
    • Pernicious anemia
    • Vitiligo
    • Autoimmune thrombocytopenia
    • Autoimmune hemolytic anemia
    • Autoimmune thyroiditis
    • Alopecia areata
    • Keratoconjunctivitis sicca
    • Inflammatory Arthritis
slide19

CVID: Clinical Manifestations

  • Hematologic manifestations
    • Granulomatous disease
      • Noncaseating epithelioid granulomas of liver, lung, spleen, skin, gut
    • Amyloidosis
    • Tonsilar tissue normal or enlarged
    • Lymphadenopathy
    • 25% splenomegaly
slide20

CVID: Clinical Manifestations

  • Malignancy
    • 300+ fold increase in lymphomas in women between 50-60 yo
    • 50 fold increase in gastric carcinoma
    • Thymoma
    • MALT lymphoma
    • Lymphoreticular malignancy
slide21

CVID: Clinical Manifestations

  • Pulmonary manifestations
    • Pneumonia
    • Asthma
    • Bronchiectasis
    • Lymphoid interstitial pneumonia (LIP)
    • Pulmonary Fibrosis

Best predictor of improved pulmonary outcome is early diagnosis and aggressive treatment.

J. de Gracia, et al., Int Immunopharmacol 4 (2004), 745–753.

laboratory evaluation of humoral immune deficiency
Laboratory evaluation of Humoral Immune Deficiency
  • Targetted H&P for recurrent infections and autoimmunity
  • Quantitative serum Ig (age and sex matched controls)
  • Measurement of Ab production
    • Pneumococcal polysaccharide
    • HIB polysaccharide
    • Tetnus toxoid
  • Measurement of quantitative Ag-specific Ig titer pre- and post-immunization
    • 4 week post-immunization level within protective range and >4 fold rise from baseline
  • Peripheral blood lymphocyte subset analysis
quality not quantity
Quality not Quantity
  • Measurement of Antigen-specific (i.e. tetanus, HIB, pneumococcal) IgG titer pre- and post-immunization
    • 4 week post-immunization level within protective range and/or >4 fold rise from baseline
slide24

Immunoglobulin Defects

  • <2 SD below the mean in IgG and another Ig class or <5th percentile of total IgG for a given age
  • Poor or absent response to immunization
    • <Two-fold increase in Ag-specific titer
cvid clinical surveillance
CVID: Clinical Surveillance
  • PFT’s
  • High resolution CT of the chest to evaluate for bronchiectasis
  • Stool O&P, bacterial cx, C. difficile for changes in GI sx
  • CBC q6 mo for autoimmune cytopenias
  • Low threshold for lymphoma
slide26

Treatment of CVID

  • IVIG
    • Higher doses to keep trough IgG levels >500 mg/dl decreases infections, hospitalizations, need for abx therapy and improves pulmonary function
    • 0.2-0.6 g/kg/mo or 300-500 mg/kg/q2-4 weeks IV
    • IV and subcutaneous routes equally effective
    • Pre-existing chronic lung disease is not improved by IVIG

Stiehm, E et al. Pediatr Infect Dis J, 1997. 16 (7): 696-707.

slide27
IVIG
  • First licensed in 1981 for primary antibody deficiencies as an improved, less painful alternative to IM injections of IG
  • Subtle differences in Ab titers, IgA depletion, and IgG subclass that vary between lots as well as manufacturers
    • Gammagard-SD, Polygam-SD: IgA def patients
  • Preparations with high titer specific IG against infectious pathogens
    • Cytogam: High titered IVIG for CMV
    • Respigam: High titered IVIG for RSV
  • Increased toxicity with live virus vaccines (MMR)
    • Do not administer within 3 months of vaccination
  • T ½ 15-30 days
side effects of ivig
Side Effects of IVIG
  • Mild side effects occur in approximately 10% of infusions
  • Side effects often preventable with ASA (15 mg/kg/dose) or acetominophen (15 mg/kg/dose) with diphenhydramine (1mg/kg/dose).
  • Occasionally, hydrocortisone (6mg/kg/dose, max=100mg) 1hr prior

Stiehm, E et al. Pediatr Infect Dis J, 1997. 16 (7): 696-707.

infectious disease transmission with ivig
Infectious Disease Transmission with IVIG
  • Hepatitis C has been reported after administration of certain lots of IVIG
    • Cases appeared after Hep C Ab+ patients were excluded as donors
    • Hypothesis is that Hep C Ab neutralizes virus in donor pools
    • Consequently new pasteurization +/- solvent/detergent processing and testing for HCV RNA to reduce viral transmission
  • Several IVIG lots were recalled after donors developed Creutzfeldt-Jakob disease
    • No cases were reported of CJD transmission
  • No cases have been reported of HIV transmission
subcutaneous igg vivaglobulin
Subcutaneous IgG (Vivaglobulin)
  • Ochs HD et al; Subcutaneous IgG Study Group. Safety and efficacy of self-administered subcutaneous immunoglobulin in patients with primary immunodeficiency diseases.J Clin Immunol. 2006 May;26(3):265-73.
  • Moller G et al: Subcutaneous immunoglobulin replacement in patients with primary antibody deficiencies: safety and costs. Lancet. 1995 Feb 11;345(8946):365-9.
selective iga deficiency
Selective IgA deficiency
  • Severe deficiency or total absence of the IgA class of immunoglobulins
  • Estimated prevalence 1:500-1:1000 persons
  • Spectrum of clinically affected
    • Asymptomatic
    • Recurrent infections: sinopulmonary, diarrhea
selective iga deficiency1
Selective IgA deficiency
  • Higher incidence of autoimmunity
    • RA
    • SLE
    • ITP
  • Atopy
    • Asthma
    • Food allergy
selective iga deficiency2
Selective IgA Deficiency
  • Treatment
    • Supportive
  • Risk of anaphylaxis to blood products
    • Formation of IgG or IgE anti-IgA antibodies
  • Subset with IgG2 subclass deficiency
igg subclass deficiency
IgG Subclass Deficiency
  • The IgG class of antibodies is composed of four different subtypes of IgG molecules
    • IgG1, IgG2, IgG3, and IgG4
  • Patients who lack, or have very low levels of, one or two IgG subclasses, but whose other immunoglobulin levels are normal, are said to have a selective IgG subclass deficiency.
igg subclass deficiency1
IgG Subclass Deficiency
  • The clinical significance of abnormal IgG subclass levels in patients with recurrent infections is unclear
  • A low level of at least 1 IgG subclass has been found in approximately 2% of a given population, and Impaired antibody production may not be seen among adult patients with IgG3 subclass deficiency
  • A low level of 1 or more IgG subclasses alone is generally not considered sufficient for a diagnosis of immunodeficiency
  • In individuals with recurrent infections and 1 or more low levels of IgG subclasses, a demonstrable impairment in antibody response to vaccination or natural exposure is considered the most important determinant of disease

Bonilla F et al, Ann Allergy Asthma Immunol. 2005 May;94(5 Suppl 1):S1-63.

putting it all together
Putting it all together. . .
  • H&P:
    • Pattern of recurrent infections
  • Rule out secondary causes of immune dysfunction
    • Medications
    • Other chronic diseases
    • Protein wasting states
  • Laboratory assessment: quality not quantity.
    • Measurement of antigen-specific Ig titers pre- and post-immunization
primary humoral immunodeficiency
Primary Humoral Immunodeficiency
  • Referral to a Clinical Immunologist
  • IVIG or SQ Ig only where there is demonstrable impairment in IgG production of antigen-specific antibody titers (quality not quantity)
  • Supportive antibiotics
  • Vaccinations: Prevnar, HIB, influenza
  • Surveillance for associated clinical conditions
key references
Key References
  • Immune Deficiency Foundation website: http://www.primaryimmune.org/
  • Orange JS et al. Use of intravenous immunoglobulin in human disease: a review of evidence by members of the Primary Immunodeficiency Committee of the American Academy of Allergy, Asthma and Immunology. J Allergy Clin Immunol. 2006 Apr;117(4 Suppl):S525-53.
  • Bonilla F et al. Practice parameter for the diagnosis and management of primary immunodeficiency. Ann Allergy Asthma Immunol. 2005 May;94(5 Suppl 1):S1-63.
additional references
Additional References
  • Conley, ME et al. Diagnostic criteria for primary immunodeficiencies. Clin Immunol 1999. 93 (3): 190-7.
  • Stiehm, E et al. Human intravenous immunoglobulin in primary and secondary antibody deficiencies. Pediatr Infect Dis J, 1997. 16 (7): 696-707.
  • Spickett, GP et al. Common variable immunodeficiency: how many diseases? Immunol Today, 1997. 18 (7): 325-8.
  • Rosen, FS et al. Medical progress: the primary immunodeficiencies. NEJM 1995. 333 (7): 431-40.
  • Spickett, GP. Current persepctives on common variable immunodeficiency (CVID). Clin & Exper Immunol 2001. 31 (4): 536-42.
  • Middleton, E (ed) et al. Allergy Principles and Practice. 5th Ed. Mosby 1998. 724-5.
  • Ballow, M. Primary immunodeficiency disorders: antibody deficiency. Curr Rev Allergy and Clin Immunol 2002. 109 (4): 581-91.
  • Bacchelli et al.Clin Exp Immunol 2007; 149:1365-2249.
additional references1
Additional References
  • Cunningham-Rundles, C et al. Common variable immunodeficiency: clinical and immunological features of 248 patients. Clin Immunol 1999. 92: 34-48.
  • Sweinberg SK et al. Retrospective analysis of the incidence of pulmonary disease in hypogammaglobulinemia. J Allergy and Clin Immunol 1991. 88 (1) 96-104.
  • Buckley, RH et al. The use of intravenous immne globulin in immunodeficiency diseases. NEJM 1991. 325 (2): 110-116.
  • Punnonen, J et al. IL-4 synergizes with IL-10 and anti-CD40 MoAbs to induce B-cell differentiation in patients with common variable immunodeficiency. Scand J Immunol 1997. 45: 203-12.
  • Farrington, M et al. CD40 ligand expression is defective in a subset of patients with common variable immunodeficiency. PNAS 1994. 91: 1099-1103.
  • Schaffer, FM et al. Individuals with IgA deficiency and common variable immunodeficiency shar polymorphisms of major histocompatibility complex class III genes. PNAS 1989. 86: 8015-9.
  • Massimo, M et al. Alterations of the X-linked lymphoproliferative disease gene SH2D1A in common variable immunodeficiency. Blood 2001. 98 (5): 1321-5.