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Chemotherapy for the Family PhysicianDr. Jan-Willem Henning MBChB FRCPCMedical OncologistTom Baker Cancer Centre
+Objectives
Case Based
List the different classes of systemic therapies
To review an approach to all (some) of these agents
Understand (not memorize) side effects
Manage some of the side effects
Appreciate the advances of systemic therapies
+Why Chemotherapy?
+Cancer:
If left untreated-lethal Disease
+Cancer:
Hallmarks of Cancer Growth
+Case
45 year women stage IIB (Lymph node +) right-sided Breast Cancer
Post Segmental and SLND procedure
Tumour: Estrogene Receptor postive ER (+)/PgR (+)
HER-2 Overexpressed (IHC-3+)
FEC-DH followed by Tamoxifen
Whole Breast and local-regional Irradiation
What kind of doctors see breast cancer patients?
family physicians radiologists pathologists general surgeons plastic surgeons medical oncologists radiation oncologists geneticists
They ask for your advice!
neurologists neurosurgeons cardiologists psychiatrists gynecologists emergency physicians respirologists orthopedic surgeons
+History of Chemotherapy
+
Cytotoxics/Chemotherapies
Alkylators & Platinums
Antimetabolites
Topoisomerase I & II Inhib.
Antimicrotubule Agents
Proteosome inhibitors
Corticosteroids
Systemic Treatment of Cancer
Hormones:AntiestrogensAromatase InhibitorsProgestinsGnRH Analogues(Anti)-AndrogensOctreotide
Immunologics:Interferon, IL-2BCGVaccineMonoclonal AntibodiesThalidomide
New Approaches:Host: Bisphosphonates/RANK-Ligand Anti-angiogenesisDifferentiation: retinoids (ATRA)Molecular Targeted Therapy
Tyrosine kinase inhibitors EGFR, BCR-ABL
Farnesyl transferase inhibitorsOncolytic viruses
+Let’s simplify matters
Chemotherapy
Hormonal agent
Targeted Agents: “Nibs and Mabs”
Immunologic agent
Supportive Medications
+Reasons To Give Chemotherapy
(systemic)
Improve Amount of Life Cure
e.g. Lymphoma, AML, Germ Cell & Ovarian ca, Ewing’s sarcoma Adjuvant therapy for breast
and colorectal ca Limited SCLC
Lengthen Survival e.g. above, Bladder, NSCLC
Improve Quality of Life Palliate symptoms
e.g. Breast, Bladder, Lung ca Delay symptom onset (disease-free
survival) e.g. Adjuvant Therapy
Organ Preservation e.g. Sarcoma, H&N ca, Breast, Anal & Bladder ca Less morbid surgery
+Reasons To Give Chemotherapy
(systemic)
We use our own language:
-Curative Intent
-Adjuvant/Neo-adjuvant
-Conversion therapy
-Palliative
+ Cell Cycle NonspecificCell Cycle Specific
+
Alkylators & Platinums: cyclophosphamide, chlorambucil, busulfan, thiotepa, CCNU cisplatin, carboplatin
Antimetabolites: methotrexate, 5-fluorouracil, Ara-C, gemcitabine, 6-MP, fludarabine,
Cladribine (2CDA), Pentostatin
Topoisomerase I Inhibitors: irinotecan, topotecan
Topoisomerase II Inhibitors: etoposide, teniposide, anthracyclines, mitoxantrone, actinomycin-D,
amsacrine
Chemotherapy Classification
+ Chemotherapy Classification
Antimicrotubule Agents vinca alkaloids: vincristine, vinblastine, vinorelbine taxanes: paclitaxel, docetaxel
Proteosome inhibitors bortezomib (Velcade®)
Corticosteroids: prednisone, dexamethasone
Miscellaneous: bleomycin: DNA intercalation, Fe2+ complex, O2 radicals L-asparaginase: depletes asparaginase, inhibits protein synth suramin: inhibits PDGF, FBF,TGF, EGF, ILGF and others
+Chemotherapy Side-
Effects
Alopecia Fatigue Mucositis Nausea and Vomiting Diarrhea or constipation Cystitis Neutropenia (F.N.) Anemia and
Thrombocytopenia Skin-HFS
Allergic Reactions
Capillary Leak Syndrome
Peripheral Neuropathy
Nail Changes
Myalgia's and Arthralgia's
Acute (All) Acute (Taxane common)
+Chemotherapy Side-Effects
• Late
1. Premature menopause/infertility
2. Secondary Malignancies (Leukemia)
3. Cardiomyopathy
4. Pulmonary Fibrosis (Pneumonitis)
+
+Medical Emergency:Febrile Neutropenia
+NCI CTCAE Grading Systemfor NeutropeniaNeutropenia: • Absolute blood neutrophil count (ANC) <2 SDs below normal1
• Normal neutrophil levels vary with age & race2
• Normal: 1.8-7.0 x 109/L, mean = ~4.0 x 109/L
6
1. Lima et al. Ann Hematol 2006;85:705-9.2. Sievers, Dale. Types of severe chronic neutropenia. www.neutropenia.ca 2006. 3. Adapted from NCI CTCAE v4.03. http://evs.nci.nih.gov
CTCAE = common terminology criteria for adverse events; LLN = lower limit of normal;NCI = National Cancer Institute; SD = standard deviation
Grade ANC (x 109/L)3
Grade 1Mild
<LLN to 1.5
Grade 2Moderate
<1.5 to 1.0
Grade 3Severe
<1.0 to 0.5
Grade 4Life-threatening, disabling
<0.5
+NCI CTCAE Grading System for Febrile Neutropenia
7
Adapted from NCI CTCAE v4.03. http://evs.nci.nih.gov
NCI = National Cancer Institute; CTCAE = common terminology criteria for adverse events
Grade ANC (x 109/L)3
Grade 1Mild
--
Grade 2Moderate
--
Grade 3Severe
ANC <1.0 x 109/L with a single temperature of >38.3C (101 F)
or sustained temperature of ≥38C (100.4 F) for >1 hour
Grade 4Life-threatening, disabling
Life-threatening consequences;urgent intervention indicated
+Clinical Signs of Infection in Patients with Neutropenia• Signs and symptoms of infection are often absent or muted in the
absence of neutrophils• Fever remains an early sign• Examples of clinical presentations suggestive of infection• Sinus/nasal tenderness• Abdominal pain• Diarrhea• Respiratory tract symptoms• Wounds or lesions• Urinary tract symptoms• Central nervous system symptoms
9
Baden et al. www.NCCN.org V1.2013
+
0
1
2
3
4
ANC
(109 /L
)
7-14 days post chemotherapy*
Highest Risk of Infection is During the Nadir Period
11
Adapted from: Crawford et al. N Engl J Med 1991;325:164-70.
*On average 3 weeks post radiation, case dependent
ANC decrease and nadir duration are dependent upon therapy, dose and route of administration
Recovery period also dependent on regimen and
patient status
0
1
2
3
4
ANC
(109 /L
)
7-14 days post chemotherapy*
Highest Risk of Infection is During the Nadir Period
11
Adapted from: Crawford et al. N Engl J Med 1991;325:164-70.
*On average 3 weeks post radiation, case dependent
ANC decrease and nadir duration are dependent upon therapy, dose and route of administration
Recovery period also dependent on regimen and
patient status
+Risk of Infection Increases with Duration and Severity of NeutropeniaIncidence of serious infection in patients with neutropenia (n=52)
10
Adapted from Crawford et al. Cancer 2004;100:228-37.
10%
30%
45%50%
65%
28%
50%
72%
85%
100%
0
25
50
75
100
≤ 1 wks 2 wks 3 wks 4 wks ≥ 6 wks
Patie
nts
(%)
Duration of neutropenia
ANC nadir <1.0 x 10 /LANC nadir <0.1 x 10 /L
Note: Based on data from Bodey et al. (n=52 patients with acute leukemia)
9
9
+Case
45 year women stage IIB (Lymph node +) right-sided Breast Cancer
Post Segmental and SLND procedure
Tumour: Estrogene Receptor postive ER (+)/PgR (+)
HER-2 Overexpressed (IHC-3+)
FEC-DH followed by Tamoxifen (Herceptin=Trastuzumab)
Whole Breast and local-regional Irradiation
+ Monoclonal Antibodies“Mabs”
HER-2 is a cell surface signaling protein
<10,000 HER2 proteins on normal breast cell
HER-2 gene amplification results in marked
overexpression of HER2 proteins
2,000,000 HER2 proteins on cancer cell
+Single Agent Trastuzumab
Her-2+ MBC Setting: Prior to 2012/2013
+Cytotoxic Mechanisms of MoAbs
Effector cells/Complement
Apoptosis Radiation/Radionuclide
Toxin/Drug
+Examples of Monoclonal
Antibodies
Remember “mabs”
Rituximab (Rituxan) Lymphoma
Trastuzumab (Herceptin) Breast
Pertuzumab (Perjeta) Breast
Cetuximab (Erbitux) Colon, Heand&Neck
Panitumumab (Vectibix) Colon
Bevacizumab (Avastin) Colon, GBM, Lung
Ipilumumab (Yervoy) Melanoma
+Potential side-effects of MoAbs
Drug Specific
Reversible Cardiomyopathy
Myalgia’s
Allergic Reactions
Electrolyte abnormalities: Mg, K, Calcium
Bevacizumab (Avastin): Hypertension, Trombotic events-CVA/MI, Wound dehiscence, Fistula’s, Bleeding, Proteinuria.
+Common effects you may
see/manage: Acneiforme Rash
Rash Management
Acneiforme Rash
Associated with tumor response.
Sunscreen, topical combination steroid-antibiotic cream, oral minocycline.
Resolves afterwards
Cetuximab
+Common effects you may
see/manage: Hypertension
Hypertension: Reported 17-80%
Both MoAbs and Tyrosine Kinase Inhibitors (“nibs”)
Also related with tumor response and improved OS if HTN optimized
Sunitinib in RCC and Bevacizumab (Colon and Lung)
Recommendation: Treat as per HTN guidelines
CCB (Norvasc) , ACE-Inhibitor, Diuretic.
Trastuzumab Emtansine: First in Class HER2 Antibody-Drug Conjugate (ADC)
Highly potent cytotoxic agent**24-270-fold more potent than taxanes
Cytotoxic agent: DM1
Monoclonal antibody: Trastuzumab
Target expression: HER2
Systemically stable
Linker: MCC
T-DM1
+
The New Era T-DM1 (Trastuzumab-Emtansine) for HER-2 + MBC in the
Second Line
+Overall Survival: Confirmatory
Analysis
Unstratified HR=0.70 (P=0.0012)Verma et al. N Eng J Med 2012;367:1783-91
496 471 453 435 403 368 297 240 204 159 133 110 86 63 45 27 17 7 4495 485 474 457 439 418 349 293 242 197 164 136 111 86 62 38 28 13 5
Cap + LapT-DM1
No. at risk:Time (months)
78.4% 64.7%
51.8%
85.2%
0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 360.0
0.2
0.4
0.6
0.8
1.0
Prop
ortio
n su
rvivi
ng
Median (mos) No. eventsCap + Lap 25.1 182T-DM1 30.9 149
Stratified HR=0.682 (95% CI, 0.55, 0.85) P=0.0006
Efficacy stopping boundary P=0.0037 or HR=0.727 Data cut-off Jan 14, 2012
+ Adverse Events for T-DM1 Grade ≥3 AEs With Incidence ≥2%
ALT, alanine aminotransferase; AST, aspartate aminotransferase.
Adverse Event
Cap + Lap (n=488) T-DM1 (n=490)
All Grades, % Grade ≥3, % All Grades, % Grade ≥3, %Diarrhea 79.7 20.7 23.3 1.6Hand-foot syndrome 58.0 16.4 1.2 0.0Vomiting 29.3 4.5 19.0 0.8Neutropenia 8.6 4.3 5.9 2.0Hypokalemia 8.6 4.1 8.6 2.2Fatigue 27.9 3.5 35.1 2.4Nausea 44.7 2.5 39.2 0.8Mucosal inflammation 19.1 2.3 6.7 0.2Thrombocytopenia 2.5 0.2 28.0 12.9
Increased AST 9.4 0.8 22.4 4.3
Increased ALT 8.8 1.4 16.9 2.9
Anemia 8.0 1.6 10.4 2.7
Verma et al. N Eng J Med 2012;367:1783-91
Data cut-off Jan 14, 2012
+Many more examples in almost
all Tumor Sites
+ Intracellular Pathways leading to developing the TKI’s-“Nib’s”
+Imatinib targets the cause of CML
Imatinib: a specific inhibitor of a small family of tyrosine kinases, including Bcr-Abl
+One step closer moving away from chemo and now curing
CML
+Tyrosine Kinase Inhibitors
“Nib’s”
Imatinib (Gleevec) CML, GIST
Sunitinib (Sutent) RCC, Neuro-Endocrine
Sorafenib (Nexavar) HCC, RCC
Pazopanib (Votrient) RCC, GIST
Erlotinib (Tarceva) and Gefitinib (Iressa) Lung
Regorafinib (Stivarga), Colon, GIST
Vemurafenib (Zelboraf) Melanoma
…and many others “nibs”
+TKI Toxcicities
Common
Rashes (response)
Fatigue (asthenia)
Diarrhea
Anorexia
HTN
Electrolyte abnormalities
Liver Transaminitis
Myelosuppression
Rare
Cardiac: MI, CHF, pQTC
Thyroid
Impaired Wound Healing
Nephrotic syndrome/AKI
Myopathy
Bleeding (hemoptysis/intra-tumoral)
+Case
45 year women stage IIB (Lymph node +) right-sided Breast Cancer
Post Segmental and SLND procedure
Tumour: Estrogene Receptor postive ER (+)/PgR (+)
HER-2 Overexpressed (IHC-3+)
FEC-DH followed by Tamoxifen
Whole Breast and local-regional Irradiation
+Hormonal Therapies
Antiestrogens (SERM’s and Blockers)
Aromatase Inhibitors
Progestins
GnRH Analogues
(Anti)-Androgens
Octreotide
+Summary
Improvement in better chemotherapies: Does not kill patient faster than the cancer
Better Supportive Medications
New agents (mabs/nibs) alone or in combination with chemotherapy has increased OS
More options available
Still more novel treatments to come
$$$