Heme Lymph Flashcards

(150 cards)

1
Q

Oncogenes

A

Ras

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2
Q

Tumor suppressor

A

P53

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3
Q

Go G1 S and g2 M

A

M mitosis
Go resting phase of G1
G1has restriction point whihc activation of oncogenes overrides
S synthesis dna replication phase
G2 has dna replication checkpoint which tumor suppressor genes p53 override

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4
Q

Primary chemo

A

Chemo is the primary treatment in advanced cancer with no alternative treatment

Relieve tumor related symptoms, improve quality of life, prolong time to tumor progression

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5
Q

Curable cancer with primary chemo

A

Hodgkin and non Hodgkin lymphoma, choriocarcinoma, germ cell cancer, and acute myelogenous leukemia

Kids-burkitts, wilms, embryonal rhabdomyosarcoma, ALL

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6
Q

Neoadjuvant chemotherapy

A

For localized cancer in adjunct ro other methods whihc are less than completely effective

Reduce size of primary tumor to make surgery easier or spare vital organs

Chemo given for time after surgery as ADJUVAnT therapy

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7
Q

ADJUVAnT chemotherapy

A

After surgery

Reduce incidence of local adhd systemic recurrence and improve overall survival of patients

Prolong disease free survival and overal survival

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8
Q

What is the log kill hypothesis

A

Symptoms high number of cancer cells/death -Infrequent treatment, treatment started too late , prolongation of survival with eventual death

Diagnosis pretty high cancer cells- Combination chemotherapy, intensive treatment schedule, therapy continued after clinical evidence of cancer disappears, cure

Surgery lower number-Early surgery combines with intensive adjuvant therapy

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9
Q

Primary/inherent chemotherapeutic resistance

A

Drug resistance int he absence of prior exposure to available standard agents

Genomic instability of cancer p53

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10
Q

Acquired chemo drug resistance

A

Develops in response to exposure to a given cancer drug

Genetic change-amplification or suppression fo a particular gene

Increasing heterogeneity over time ->tumor continues to proliferate and is no resistant to treatment x

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11
Q

P-glycoproteins, PGP

A

On tissues with barrier functions including the kidney, liver and GI tract
Pharmacological barrier sites including the blood brain barrier and the placental blood barrier

High baseline expression of PGP correlates wit hprimary/inherent resistance to natural products

Can be overprexpressed leading to acquired drug resistance

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12
Q

Therapeutic index

A

TD50/ED50

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13
Q

Chemo therapeutic index

A

Close ED50 and TD50 when desired is low ED50 and high TD50

High doses are required ot maximize rapid cancer cell death

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14
Q

AE chemo

A
Non cancerous proliferating cells
—bone marrow precursors of blood cells(cytopenias, myelosuppression)
—intestinal epithelial cells
—oral mucosa
—gonadal cells
—hair follicles-alopecia
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15
Q

MOA alkylation agents

A

Transfer of alkyl groups to DNA leading to DNA cross linking

Arrest in late G1, early S phase

Individual drugs vary in how they do this-cisplastin versus cyclophosphamide

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16
Q

What cells are most susceptible to alkalyating agents

A

Replicating cells

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17
Q

Resistance alkalyating agents

A

Increased capability to repair DNA lesions through increased expression of activity of DNA repair enzymes

Decreased cellular transport of alkyating drug

Increased expression or activity of glutathione and glutathione associated proteins
—these are needed to conjugate the alkyating agents

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18
Q

Alkylation agents adverse effects

A
Primarily occur in rapidly growing tissue 
-bone marrow
—myelosuppression
-GI tract
—diarrhea
-reproductive system 

N/V
Blistering at the site of administration

Carcinogenic-increased risk of secondary malignancies AML

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19
Q

MOA antimetabolites

A

Methotrexate-folic acid metabolite

5-FU uracil analog

Cytosine arabinoside-cytosine deoxyriboside

Mimic and/or reduce the essential components needed for the formation of DNA, RNA and proteins
Arrest and/or DNA damage often occurs during S phase

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20
Q

Cells most susceptible to antimetabolites

A

Replicating

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21
Q

Resistance antimetabolites

A

Inhibition of metabolism intoactive metabolites-cytarabine and the active metabolite of art-ctp

Decrease drug transport
-methotrexate and the reduced folate carrier or folate receptor

Decreased formation of poly glutamate metabolites by folyl polyglutamate synthase (FPGS)
-important for methotrexate, pemetrexed and pralatrexate

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22
Q

Ae antimetabolites

A

Myelosuppression
N/v
GI toxicity(5-FU)

Hand foot syndrome

  • painful erythema and swelling of the hands and feet
  • pemetrxed
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23
Q

Natural products MOA

A

Tubules polymerization disrupted by vinblastine, vincristine, vinorelbine and enhanced by paclitaxel, docetaxel, and cabazitaxel

Topoisomerase inhibitors
Topoisomerase 1 topotecan, irinotecan
Topoisomerase 2-etoposide

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24
Q

Mechanism of resistance natural products

A

P-glycoproteins mediated drug efflux

Point mutations ind rug binding (topo 1 and 2)

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25
AE natural products
``` Myelosuppression N/v Neurotoxicity -vincristine Hypersensitivity -paclitaxel and docetaxel Diarrhea -topotecan and irnotecan ```
26
MOA antitumor antibiotics
Inhibition of topoisomerase 2, generation fo free radicals (DNA damage), DNA intercalated -anthracyclines (doxorubicin) Induce DNA cross links -mitomycin DNA fragmentation and single/double strand breaks due to free radical formation -bleomycin
27
Mechanism of resistance antitumor antibiotics
Point mutations in topo2, suppression of apoptotic signaling -doxorubicin Increased expression f multidrugresistant efflus pumps -doxorubicin and mitomycin Upregulation of bleomycin hydrolase enzyme -inhibits bleomycin iron binding and limits its cytotoxic effects
28
Antitumor ae
``` Myelosuppression N/v Free radical mediated cardiotoxicity -doxorubicin Blue fingernails, sclera, urine -mitoxantrone Pulmonary toxicity -bleomycin ```
29
Tyrosine kinase and growth factors receptor inhibitors MOA
Inhibit growth factor receptor signaling | Inhibit tyrosine kinase activity
30
Resistance tyrosine kinase and growth factors receptor inhibitors
Point mutations in drug binding sites
31
AE tyrosine kinase and growth factor receptor inhibitos
N/v Acneform skin rash and hypersensitivity -cetuximab
32
Immune checkpoint inhibitors
Nivolumab and pembrolizumab - PD1 inhibitors - melanoma, NSCLC, hodgkins Atezolizumab, avelumab, durvalumab -PD-L1 inhibitor-bladder cancer, NSCLC, meckel cell skinc ancer
33
Molecular background immune checkpoint inhibitors
T cell activated by dendritic cells within lymph node Activated T cell penetrates the tumor microenvironment -tumor microenvironment includes tumor cells, macrophages, and t regulatory cells The tumor may possess PD-L1; activated T cells may induce PD-L1 upregulation on tumor cells, macrophages and t reg cells through the release of interferon y An activated T cell inactivated when it binds PD-L1 -B7.1 and PD-1: receptors on T cell forPD-L1
34
Mechanism resistance immune checkpoint inhibitors
Primary or acquired Insufficient generation of anti tumor T cells Inadequate function of tumor specific T cells Impaired formation of T cell memory
35
AE immune checkpoint inhibitors
Fatigue, nausea, loss of appetite, itching Can allow the immune system to attack normal organs (serious problem) -lungs, intestines, liver kidneys
36
Point of immune checkpoint inhibitors
New class of chemo that boosts immune system mediated tumor clearance
37
The leukemia’s
ALL AML CML CLL
38
ALL
Acute childhood leukemia Most common ancer in kids Discovery of methotrexate increase survival
39
Treat all
6-merceptopurine, cyclophosphamide, vincristine, and danorubicin Enter remission with combination prednisone with vincristine
40
When circulating leukemia cells migrate to sanctuary sites located int he brain and testes
Intrathecal methotrexate to prevent CNS leukemia (prophylaxis) -major mechanism of relapse
41
AML
Most common leukemia in adults
42
Treat AML
Cytarabine most active Best used in combo with anthracycline But idarubicin is preferred
43
Intensive support care during period of induction of chemo with AML
Platelet transfusions to prevent bleeding G-CSF , filgrastim to shorten periods of neutropenia Antibiotics to combat infections
44
How get remission of aml
Allergenic bone marrow transplant | -preceded by high dose chemo and total body irradiation followed by immunosuppression
45
After remission
Consolidation chemo with high does cytarabine or hematopoietic cell transplant
46
At what age do ppl respond less to chemo for aml
60 tolerance to aggressive therapy and their resistance to infection are lower
47
CML
BCG-Abl fusion oncoprotein -Philadelphia chromosome t9:22 Get constitutive expression of Bcr-Abl fusion oncoprotein
48
How treat CML
Reduce granulocytes to normal levels, raise hemoglobin concentration to normal, relieve disease related symptoms,
49
Treat CML
Imatinib first line in previously untreated most exhibit a complete hematologic response Dasatinib and nilotinib initially approved for patients intolerant to imatinib Currently each shows clincial activity and now both are indicated as first line treatment of chronic CML Busulfan and other oral alkyating agents also are effective
50
CLL
High risk disease or the presence of disease related symptoms means treatment warranted
51
How treat CLL
Chlorambucil and cyclophosphamide alkylation gets agents - chlorambucil with prednisone - COP-cyclophosphamide combined with vincristine and prednisone - CHOP-cyclophosphamide combined with vincristine, prednisone and doxobrucin Bendamustine also approved -monotherapy or combination with prednisone
52
CLL
Fludarabine is also effective - monotherapy - combination with (cyclophosphamide) and with (mitoxantrone and dexamethasone) or it is combined with (rituximab) Rituximad is an anti-CD20 antibody -enhances chemotherapy and is effective when resistance to chemopay has emerged R CHOP Ofatumumab is fully human IgG1 antibody that binds to different CD20 epitope than rituximab - maintains activity in rituximab-resistant tumors - approved for CLL that is refractory to fludarabine therapy
53
Hodgkin’s lymphoma
A complete staging evaluation is needed before treatment plan can be formulated Biggest change is int he stage I and stage IIA disease - combined-modality therapy with a brief course of combination chemotherapy and involved field radiation - ABVD-doxorubicin , bleomycin, vinblastine, dacrabazine 50-60% of patients with Hodgkin’s lymphoma are cured of disease
54
Changes in treat for advanced stage II and IV Hodgkin’s lymphoma
MOPP-mechlorethamine, vincristine, procarbazine, and prednisone —high complete response rates (80-90%); cures in 60% of patients ABVD-doxorubicin, doxorubicin, bleomycin, vinblastine, mechlorethamine, vincristine, bleomycin, etoposide, and prednisone —alternative regimen, followed by involved radiation therapy Over 80% of previously untreated patients with advanced disease (stages III and IV) are expected to go into complete remission -complete remission=disappearance of all disease-related symptoms and objective evidence of disease
55
Non Hodgkin’s lymphoma- diffuse
Combination chemotherapy is the standard for patients with diffuse non Hodgkin’s lymphoma CHOP-cyclophosphamide, doxorubicin, vincristine, and prednisone —best treatment in terms of initial therapy CHOP+rituximab (R-CHOP) -clinical studies show increased response rate , disease free survival and overall survival versus CHOP alone
56
Non hodgkin lymphoma follicular
Initiation of chemotherapy at the onset of symptoms - watchful waiting - bendamustine+rituximab - R-CHOP
57
Multiple myeloma
Most patients symptomatic at time of initial diagnosis Requires treatment with cytotoxic chemotherapy MP protocol-melphalan+prednisone - standard regimen for 30 years - 40% of patients respond and the median duration of remission is 2-2.5 years
58
Stage I breast cancer
Small primary tumor and negative axillary lymph node dissections Treat with surgery alone 80% chance of a cure
59
Stage II breast cancer (1-3 nodes node +)
High risk of both local and systemic recurrence (micrometastasis) Postoperative use of systemic adjuvant combination chemotherapy reduces the relapse rate and prolongs survival CMF-cyclophosphamide, methotrexate, and 5-FU FAC-5-FU, doxorubicin, cyclophosphamide
60
Prostate cancer
Advanced prostate cancer becomes refractory Mitoxantrone and prednisone - approved for hormone refractory prostate cancer - provides palliative int hose experiencing significant. Bone pain Docetaxel+prednisone has become stand of care for hormone refractory prostate cancer*
61
Colorectal cancer
High risk stage II and III candidates for adjuvant chemo - FOLFOX-folinic acid (leucorvin)+5-FU+oxaliplatin - XELOX-capecitabine+oxalplatin - used for 6 months following surgical resection - reduces recurrence rate after surgery by 35% - improves patient survival compared with surgery alone
62
Metastatic colorectal cancer
FOLFIRI-folinic acid (leucovorin)+5-FU+irinotecan -ziv-aflibercept added if progression has been observed with oxaliplatin based chemo FOLFOX or FOLFIRI+(bevacizumab or cetuximab/panitumumab) results in sig improved clincial efficacy TAS-102 approved for the chemo refractory disease setting -limited by significant toxicities ,clincial efficacy and low response rates
63
Non small cell lung cancer
ADJUVAnT platinum based chemo provides survival benefit in patients with pathological stage IB II and IIIA Radiation can be used ot relieve pain, airway obstruction or bleeding -less aggressive , used in patients that cant tolerate more aggressive
64
Chemo non small cell lung cancer
Bevacizumab -used in combination with carboplatin and paclitaxel in patients with good performance status and non squamous histology, standard treatment option Patient not a good candidate for bevacizumab or squamous cell histology present(cisplastin or carboplatin)+ cetuximab Maintance chemo=pemetrexed used in patients that have stabilized after four cycles of platinum based first line chemo
65
Erlotinib NSCLC
First line in advanced NSCLC patients with sensitizing EGFR mutations
66
Afatinib NSCLC
First line of metastatic NSCLC whose tumors have EGFR exon 19 deletions or exon 21 mutations
67
Osimertinib NSCLC
Approved for the treatment of metastatic EGFR T790M mutant NSCLC following progression on or after EGFR TKI therapy Overcomes resistance fromt he T790M gatekeeper mutation -this mutation can happen de novo or after prior TKI therapy
68
Squamous cell
Platinum based chemo Cisplastin and gemcitabine combined with necitumumab Nivolumab-if progressed on or after standard platinum based
69
Small cell
Initially sensitive to platinum based combination regimes (Cisplastin+etoposide) or (cisplastin + irinotecan) Drug resistance develops in nearly all patients with extensive disease If diagnosed early it is curable using combined chemotherapy and radiation Topotecan used as a second line monotherapy in patients that have failed based regimen
70
Ovarian cancer stage I
Whole abdomen radiotherapy Cisplastin and cyclophosphamide
71
Ovarian stage III and IV
Carboplatin and paclitaxel
72
Recurrent ovarian cancer
Topotecan or liposomes doxorubicin
73
Testicular cancer
PEB-Cisplastin , etoposide, bleomycin High risk disease-high dose cisplastin+etoposide+bleomycin
74
Malignant melanoma
Curable with surgical resection when it presents locally Once metastasis has occurred it is onee of most difficult to treat Dacarbazine, temozolomide and cisplastin most active -low response rate Biological agents IFNa and IL2 have greater activity than traditional agents, treat with a high dose IL2
75
Malignant melanoma
Nivolumab and pembrolizumab
76
Brain cancer
Nitrosoureas most active - cross BBB - carmustine sued as a single agent - PCV-procarbazine+lomustine+vincristine Alkyating agent temozolomide -patients with new glioblastoma multiforme Oligodendroglioma chemosensitive -PCV regimen is treatment of choice Bevacizumab alone or in combination ith chemo has documented clincial activity in adult GBM
77
Drugs for neutropenia
Filgrastim Pegfilgrastim Sargramostim Plerixafor
78
Drugs for thrombocytopenia
Oprelvekin Romiplastin Eltrombopag
79
Iron therapy from food
Meat fish poultry well absorbed Poorly from veggies, grain, milks and eggs
80
Oral iron 200-400 mg for microcytic anemia
Ferrous in divided doses with only water/juice food inhibits absorption
81
AE iron therapy
Nausea, constipation, anorexia, heartburn, vomiting, and diarrhea and dark stools
82
Parenteral iron
For iron malabsorption, intolerance of oral therapy, noncompliance -iron dextran, sodium ferric gluconate complex and iron sucrose
83
When get iron effects
Reticulocytosis in a few days and increase Hb in a 2 weeks
84
Acute iron toxicity
Young kids Necrotizing gastroenteritis with vomiting, abdominal pain and bloody diarrhea->shock, lethargy, dyspnea Suggestion of improvementthen severe metabolic acidosis, coma, death
85
Treat acute iron toxicity
Deferoxamine (potent iron chelating)
86
Chronic iron toxicity
Hemochromatosis Deposits in heart, liver, pancrease->organ failure and death Hereditary hemochromatosis an dpatients who receive many red cell transfusions over a long period of time
87
B12
Animal products Fortified breakfast cereals -for vegetarians Need 2 microgram/day Body stores 2-5 mg -takes years to become deficient
88
Why take years to become b12 deficient
Normal body stores greatly exceed daily requirement
89
NO inhaled analgesia and B12
Inactivated cyanocobalamin | -normally rapidly replenished from body store
90
If body store of B12 depleted
Rapid onset neurological dysfunction (paresthesia s, weakness, spasticity) that may not fully reverse
91
Absorption b12
IF from parietal cells and absorbed in ileum
92
Pernicious anemia
Elderly Autoantibody blocks IF-Cbl interaction or IF-Cbl receptors in ileum Gastrectomy or gastritis H pylori
93
Treat b12 defiency
Oral b12 supplementation in pernicious anemia Parenteral therapy if neurological symptoms are present
94
Folate what in
Yeast, liver, kidney, green leafy
95
Usual cause of folate defiency
Inadequate dietar intake or alcoholism
96
Treat folate defiency
1 mg a day for 4 months
97
High doses folate
Hypotension, hypoglycemia
98
Treat megaloblastic anemia
Improve within a few days Should see reticulocytosis in 2-5 days HCG up in 2 months Neurological symptomslonger to improve an dmay be irreversible but not worsen
99
Folate supplementation for elderly?
Increases risk of masking megaloblastic anemia caused by b12 defiency
100
Epoetin alfa moa
165 aa erythrpopiesis stimulating glycoproteins - from recombinant DNA - identical aa sequence of isolated natural erythropoietin
101
Effects epoetin Alfa
Stimulated erythropoiesis Increase reticulocytosis count<10 days Increase RBC could and hemoglobin and hematocrit Usually include irona nd folate
102
Clincial epoetin Alfa
Anemia from chronic kidney disease, cancer chemo, zidovudine treatment for HIV Reduce allergenic rbc transfusions in patients undergoing elective surgery Use banned by international Olympic
103
Pharm epoetin alfa
Administered IV or subcutaneously | Half life of 4-13 horus
104
AE epoetin alfa
DAP>10 mmHg Death, MI, stroke, venous thromboembolism,, thrombosis of vascular access and tumor progression or recurrence -cough HA, muscle pain, spasm, joint or bone pain, spasms, vomiting, insomnia wight loss
105
Darbepoetin alfa
3x longer HL 21 hours
106
Hydroxyurea moa
Targets ribonucleotide reductase results in s phase cell cycle arrest Somehow. Boosts the levels of fetal hemoglobin mechanism unknown
107
Effects hydroxyurea
Lowers concentration of Hb S within a cell_> less polymerization of the abnormal hemoglobin
108
Celincal applciation hydroxyurea
Sickle cell!!!!!
109
Pharmacokinetics sickle cell
Orally Wide distribution. Concentrates in erythrocytes and leukocytes Has multiple metabolic pathways also excreted unchanged by kidney
110
AE hydroxyurea
Cough, hoarseness, fever, chills, low back pain, painful difficult urination
111
Eculizumab moa
Monoclonal antibody that specifically binds to complement protein C5 with high affinity Inhibits its cleavage to C5a and C5b Prevents generation of terminal complement complex C5b-9
112
Effects eculizumab
Inhibits terminal complement mediated intravascular hemolysis in PNH...RBC lack enough CD59 and CD55 to prevent MAC mediated destruction Inhibits complement mediated thrombotic miccroangiopathy in patients with atypical HUS
113
Clincial eculizumab
PNH Atypical HUS
114
Pharmacokinetics eculizumab
IV over 35 min Maintence dose EXPENSIVE 444,000/yr but so effective
115
AE eculizumab
Infections herpes influenza like ``` Meningococcal infections must have menigococcal vaccine Immunogenicity URI MSK pain Anemia, leukopenia HTN HA Insomnia fatigue UTI ```
116
Filgrastim moa
G-CSF made by recombinant DNA
117
Effects filgrastim
G-CSF regulates production neutrophils in bone marrow
118
Clincial filgrastom
Decrease infection from febrile neutropenia in patients with nonmyeloid malignancies receiving myelosuppression anticancer drugs or in those receiving a bone marrow transplant Mobilize hematopoietic progenitor cells into peripheral blood for collection by leukapheresis
119
Pharmacokinetics filgrastim
IV infusion continuous wait 24 hours after chemo since dividing cells most vulnerable
120
AE filgrastom
Well tolerated Allergic reaction Bone pain Splenic rupture Acute respiratory distress
121
Pegfilgrastim
Longer lasting version of filgrastim due to conjugation with monomethoxypolyethylene glycol
122
Sargramostim moa
Recombinant form of granulocytes macrophage | GM-CSF made in year
123
Effects sargramostim
In bone marrow to increase production of neutrophils, eosinophils and monocytes//macrophages
124
Clincial sargramostim
Accelerate recovery of myeloid cells after autologous bone marrow transplantation -allogenic too Mobilize HSC into peripheral blood for collection via leukapheresis Induction chemo with AML to shorten time to neutrophil recovery/decreased incidence of severe infections
125
Pharmacokinetics sargramostim
IV ro SC
126
AE sargramostim
Benzyl alcohol can cause fatal gasping syndrome in premature infants Causes fluid retention typically->edema but can cause pleural effusion, pericardial perfusion Sequesteration fo granulocytes in pulmonary circulation has caused dyspnea Occasional supraventricular tachycardia Renal hepatic
127
Filgrastim vs sargramostim vs cost benefit analysis
Filgrastim fewer ae so filgrastim/pegfilgrastim wine -filgrastim speed recovery from severe neutropenia but little evidence of impact on clincial outcomes
128
Plerixafor moa
Partial agonist of the CXCR4 receptos, important for the homing of hematopoietic stem cells to the bone marrow
129
Effects plerixafor
Mobilizes HSC from the bone to plasma
130
Clincial plerixafor
Not mobilizing stem cells for autologous transplant with just G CSF Expensive Lymphoma, multiple myeloma
131
Pharmacokinetics plerixafor
Sq
132
AE plerixafor
Hypersenstivity reaction is main concern Has potential to mobilize leukemia cells, contaminate apheresis product
133
Oprelvekin moa
Recombinant for IL-11 Unknown moa
134
Effects eprelvekin is-11
Increases platelet levels by promoting the formation and maturation of megakaruocytes
135
Clincial applications oprelvekin is-11
Can be sued to treat thrombocytopenia in patients undergoing myelosuppressive chemotherapy for non myeloid cancers...DOES NO HAVE A MAJOR CLINCIAL USE
136
Pharmacokinetics is-11
Given sq once/day
137
AE oprelvekin
Edema from volume expansion cardiac dysrhythmias, severe allergic reactions and bloodshot eyes
138
Romiplstim moa
Peptibody compose dof two disulfide bonded human IgG1 kappa heavy chain constant regions (an Fc fragment), each of which is covalently bound at residue 228 with two identical peptide sequences linked via polyglycine that bind to the TPO receptor No TPO homologous
139
Effects romiplostim
Increased the platelet count in | -health individuals, patients with ITP, patients with myelodysplastic syndrome
140
Clincial applications romiplostim
Excess platelet destruction due to idiopathic thrombocytopenic purpura 66 ITP cases/1,000,000 per year
141
Pharmacokinetics romiplostim
Administered weekly as a sq injection
142
AE romiplostim
Well tolerated most serious is allergic reaction
143
Eltrombopag moa
Potent, orally available non peptide TPO receptor agonist
144
Effects eltrombopag
Increases the platelet count in: Healthy individuals -patients with ITP -thrombocytopenia due to hepatitis C
145
Clincial eltrombopag
Excess platelet destruction due to idiopathic thrombocytopenic purpura Cirrhosis due to hepatitis C
146
Pharmacokinetics eltrombopag
Oral once day
147
AE eltrombopag
Hepatotoxicity if sued with interferon in patients with chronic hepatitis C
148
Drugs causing hemolytic. Anemia
Cephalosporins-most common cause, espicially ceftriaxone an cefetetan Penicillin, piperacillin
149
Drug induced thrombocytopenia
Heparin Quinidine quinine
150
Drugs causing aplastic anemia
Cancer chemo (alkylation agents, antimetabolstes, cytotoxic antibiotics Chloramphenicol-antibiotic Benzene-aplastic anemia