Conventional And Unconventional Medicine In Treating Rare Diseases-�HAEMOPHILIA
Dr. V. Chandrasekhar, MD, FICP
Professor in General Medicine, Kakatiya Medical College,
Superintendent, Mahatma Gandhi Memorial Hospital,
Warangal, Telangana
What Is Rare Disease?
A rare disease is a health condition of a particularly low prevalence that affects a small number of people compared with other prevalent diseases in the general population.
There is no universally accepted definition of rare diseases and the definitions usually vary across different countries
However, the common considerations in the definitions are primarily, disease prevalence and to varying extent - severity and existence of alternative therapeutic options
Definitions Of Rare Disease In Different Countries
Indian Scenario
Haemophilia, Thalassemia, Sickle-cell Anaemia & Primary Immuno Deficiency (PID) in children
Auto-Immune diseases
Lysosomal Storage Disorders such as Pompe disease, Hirschsprung disease, Gaucher’s disease, Cystic Fibrosis, Hemangiomas and certain forms of Muscular Dystrophies.
HAEMOPHILIA
Prevalence of Hemophilia A
India
Brazil
USA
Canada
China
6
Prevalence of Hemophilia A and Hemophilia B
Case detection rate (prevalence) of Hemophilia A (HA) and Hemophilia B (HB) in five countries reporting the highest global number of patients
7
How is it inherited?
What Happens In Haemophilia?
Are there different types of haemophilia?
Severity of haemophilia A or B is based on the amount of factor present in the blood
Identification of Patients with Hemophilia
Classification Of Hemophilia Based On Diagnosis
Patients with mild hemophilia the plasma factor VIII or factor IX concentration is 0.06-0.04 IU/mL (or 6-40%)
Patients with moderate hemophilia the plasma factor VIII or factor IX concentration is 0.02-0.05 IU/mL (or 2-5%)
Patients with severe haemophilia have no measurable factor VIII or factor IX <0.01 1U/mL (or <1%)
Some important sites of bleeding
How Is Haemophilia Diagnosed?
Approximate Frequency Of Bleeding at Different Sites
Site Of Bleeding | Approximate Frequency % |
Hemarthrosis More common into hinged joints: ankles, knees, and elbows Less common into multi-axial joints: shoulders, wrists, hips | 70-80 |
Muscle | 10-20 |
Other major bleeds | 5-10 |
Central nervous system | <5 |
Haemophilia A is an X-linked genetic disorder
PWHA, people with haemophilia A
Parents
Children
Unaffected father (XY)
Carrier mother (XX)
+
Unaffected son (XY)
Affected son (XY)
Carrier daughter (XX)
Unaffected daughter (XX)
Parents
Children
Affected father (XY)
Unaffected mother (XX)
+
Unaffected son (XY)
Carrier daughter (XX)
Unaffected son (XY)
Carrier daughter (XX)
How Is Haemophilia Treated?
Certain types of surgery may become necessary, including:
Joint replacement
Removal of an uncontrollable, expanding hematoma (partially clotted blood under the skin that resembles a bruise)
Overview Of Prevention And Treatment
Veins must be treated with care during injections they are the lifelines for a person with hemophilia
Prevention of bleeding can be achieved by pro- phylactic factor replacement
Regular exercise and other measures to stimulate normal psychomotor development should be encouraged to promote strong muscles, develop balance and coordination, and improve fitness
Patients should avoid activities likely to cause
trauma
Drugs that affect platelet function, particularly
acetylsalicylic acid (ASA) and non-steroidal anti-inflammatory drugs (NSAIDs), except certainCOX-2 inhibitors, should be avoided
Good oral hygiene is essential to prevent periodontal disease and dental caries, which predispose to gum bleeding
Comprehensive Care
Comprehensive care promotes physical and psychosocial health and quality of life while decreasing morbidity and mortality
Priorities in the improvement of health and quality of life of people with hemophilia include:
Management of complications including:
products
Adjunctive Management
Adjunctive therapies are important, particularly where clotting factor concentrates are limited or not available, and may lessen the amount of treatment product required
Protection (splint), rest, ice, compression, and elevation(PRICE)may be used as adjunctive management for bleeding in muscles and joints
Physiotherapy/rehabilitation is particularly important for functional improvement and recovery after musculoskeletal bleeds and for those with hemophilic arthropathy
Antifibrinolytic drugs (e.g., tranexamic acid,epsilon aminocaproic acid) are effective as adjunctive treatment for mucosal bleeds and dental extractions
Certain COX-2 inhibitors may be used judiciously for joint inflammation after an acute bleed and in chronic arthritis
Prophylaxis prevents bleeding and joint destruction and should be the goal of therapy to preserve normal musculoskeletal function
Patients with repeated bleeding in joints, short-term prophylaxis for 4-8 weeks can be used to interrupt the bleeding cycle.
Treatment For Hemophilia
Factor Replacement Concentrates And Viral Inactivation
Recombinant Clotting Factors
Plasma Derived Factor Concentrates
Treatment For Hemophilia
Types of Products Currently used For Replacement Therapy- Hemophilia A
Type of Product | Comments |
Intermediate-purity plasma-derived FVIII concentrates | Purification from cryoprecipitate through multiple precipitation; single-step viral inactivation |
High-purity plasma-derived FVIII concentrates | Purification through ion-exchange, heparin ligand or monoclonal antibody chromatography; single- or double-step viral inactivation |
Full-length recombinant FVIII concentrates | From BHK-cultured cells in the presence of HSA, stabilized in sucrose; SD viral inactivation – From CHO-cultured cells without HSA, stabilized in trehalose; SD viral inactivation |
B-domain deleted recombinant FVIII concentrate | From CHO-cultured cells without HSA and animal protein; SD viral inactivation and nanofiltration |
Treatment For Hemophilia
Types of Products Currently used For Replacement Therapy- Hemophilia B
Type of product | Comments |
High-purity plasma-derived FIX concentrates | Purification through immunoaffinity or ion exchange plus carbohydrateor heparin-ligand chromatography; single- or double-step viral inactivation |
Recombinant FIX concentrate | From CHO-cultured cells, without HSA; nanofiltration |
Hemophilia with inhibitors (by-passing agents) | |
APCC | Plasma-derived; batch-controlled surface activation of prothrombin complex; vapour heat viral inactivation |
rFVIIa | From BHK cultured cell; FVII autoactivation during chromatographic purification; SD viral inactivation |
Guidelines for Treatment Of Hemophilia- By World Federation Of Hemophilia
Factor Replacement Therapy Protocols
Protocol | Definition |
Episodic (on-demand treatment) | Treatment given at the time of clinically evident bleeding |
Primary prophylaxis | Regular continuous treatment initiated in the absence of documented osteochondral joint disease, determined by physical examination and imaging studies, and started before the second clinically evident large joint bleed and age 3 years |
Secondary prophylaxis | Regular continuous treatment started after 2 or more bleeds into large joints and before the onset of joint disease documented by physical examination and imaging studies |
Tertiary prophylaxis | Regular continuous treatment started after the onset of joint disease documented by physical examination and plain radiographs of the affected joints |
Intermittent (periodic) prophylaxis | Treatment given to prevent bleeding for periods not exceeding 45 weeks in a year |
Treatment Of Mild Hemophilia Using DDAVP
McDaniel M. Treatment of Hemophilia A and B. National Hemophilia Foundation. 2013:1-9.
Step 1
Step 2
Step 3
Step 4
DDAVP causes (Von Willebrand Factor) to
be released from the
stores in the endothelial
cells that line the blood vessels.
VWF then binds to FVIII as it is released from the liver, protecting it from degradation
Circulating FVIII and VWF levels may rise approximately three-fold in responsive patients
Transient rises in plasma levels of FVIII in mild to moderate Hemophilia A patients
Treatment Of Hemophilia
Use Of Antifibrinolytic Agents
McDaniel M. Treatment of Hemophilia A and B. National Hemophilia Foundation. 2013:1-9.
Antifibrinolytics are particularly effective in areas where fibrinolysis appears to contribute to prolongation of bleeding, as in mucous membranes (nose, mouth, and throat) and with dental procedures
These agents can be given alone or as an adjunct therapy with DDAVP or factor VIII concentrates
The few that are currently available are Aminocaproic acid and Tranexamic acid
Guidelines for Treatment Of Hemophilia- By World Federation Of Hemophilia
(If not effective)
Strategies For Pain Management In Patients With Hemophilia
COX-2 inhibitor (e.g., celecoxib, meloxicam,
Nimesulide
Paracetamol/acetaminophen plus codeine
(3–4 times per day)
Morphine: use a slow release product with an escape of a rapid release. Increase the slow release product if the rapid release product is used more than 4 times per day
OR
OR
Evolution of Hemophilia Therapy
Current and Future Approaches to Hemophilia Care
Molecules in Development
Moroctocog alfa : Science behind the Molecule
The Content of this Presentation is only intended for registered healthcare professionals.
The medical information in this Presentation is provided as an information resource only, and is not to be used or relied on for any diagnostic or treatment purpose. Pfizer (including its parent, subsidiary and affiliate entities) makes no representation or warranties of any kind, expressed or implied; as to the content used in the Presentation and/or the accuracy, completeness of its content.
Clinical Particulars
Moroctocog alfa (AF-CC) XYNTHOPHILIA. LPDXYN022019 Pfizer Products India Private Limited. Accessed on 16th May 2019
Therapeutic Indications
Posology and Method of Administration
The required dosage is determined using the following formula:
Required units = body weight (kg) x desired factor VIII rise (IU/dL or % of normal) x 0.5 (IU/kg per IU/dL)
Dosing for Bleeding and Surgery
Moroctocog alfa (AF-CC) XYNTHOPHILIA. LPDXYN022019 Pfizer Products India Private Limited. Accessed on 16th May 2019
Type of Hemorrhage | Factor VIII Level Required (% or IU/dL) | Frequency of Doses (h)/ Duration of Therapy (d) |
Minor Early hemarthrosis, superficial muscle or soft tissue and oral bleeds | 20-40 | Repeat every 12 to 24 hours as necessary until resolved. At least 1 day, depending upon the severity of the hemorrhage |
Moderate Hemorrhages into muscles. Mild head trauma capitus. Minor operations including tooth extraction. Hemorrhages into the oral cavity. | 30-60 | Repeat infusion every 12 - 24 hours for 3 - 4 days or until adequate hemostasis is achieved. For tooth extraction a single infusion plus oral antifibrinolytic therapy within 1 hour may be sufficient |
Major Gastrointestinal bleeding. Intracranial, intraabdominal or intrathoracic hemorrhages. Fractures. Major operations. | 60-100 | Repeat infusion every 8 - 24 hours until threat is resolved or in the case of surgery, until adequate local hemostasis is achieved, then continue therapy for at least another 7 days. |
Pharmacokinetic Properties: Moroctocog alfa versus Advate
Moroctocog alfa (AF-CC) XYNTHOPHILIA. LPDXYN022019 Pfizer Products India Private Limited. Accessed on 16th May 2019
Results: Pharmacokinetics, pharmacokinetic equivalence and stability
Recht M, Nemes L, Matysiak M, Manco‐Johnson M, Lusher J, Smith M, Mannucci P, Hay C, Abshire T, O’BRIEN A, Hayward B. Clinical evaluation of moroctocog alfa (AF‐CC), a new generation of B‐domain deleted recombinant factor VIII (BDDrFVIII) for treatment of haemophilia A: demonstration of safety, efficacy, and pharmacokinetic equivalence to full‐length recombinant factor VIII. Haemophilia. 2009 Jul;15(4):869-80.
Mean (±SE) factor VIII activity-versus-time profiles following a 50 IU kg-1 infusion of FLrFVIII or BDDrFVIII based on the central laboratory potency assessment
Complementary and Alternative Therapies
Types of Complementary Treatments
Complementary and Alternative Therapies
Warangal Chapter�
FACTOR VIII PATIENTS�
accidents / surgery / dental /
pedicure / vaccination
FACTOR IX PATIENTS�Factor IX per episode - 1kg x 60IV – OD�
Factor VIII Prophylaxis:�
Experiences:
No bleeding, No hemophilia arthopathy, no complications.
No bleeding, No hemophilia arthopathy, no complications.
Challenges�
Thank you!
Thank you!
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