Waldenström’s Macroglobulinemia
Steven T. Rosen, M.D.Provost and Chief Scientific Officer
Director, Comprehensive Cancer Center and
Beckman Research Institute
Irell & Manella Cancer Center Director’s Distinguished Chair
March 15, 2018
Disclosures
Consultant for:
Celgene; AbbVie; Novartis; Seattle Genetics; Bristol
Myers Squibb and Company; Exicure
On the Speaker’s Bureau for:
Celgene; Pharmacyclics ▪ Imbruvica; Prime Oncology;
Exicure; NeoGenomics,
Waldenström’s Macroglobulinemia – first
described by Jan Gosta Waldenström in 1944.
• 72 year old W.M. – history of fatigue,
malaise, anemia (Hgb 10.7 gm/dl) and
thrombocytopenia (108 k/ul)
– Splenomegaly without adenopathy
– Dx with CLL and hemolytic anemia seven
years before – treated with rituximab,
cytoxan and prednisone
Case
Case continued
• PET/CT Scan Splenomegaly
• Bone Marrow: lymphoplasmacytic infiltrate; IgM kappa,
CD20+, CD5-, CD23-
– MYD88 mutated p.L265P, c. 794T>C
CXCR4 mutated p.5338, c. 1013G>C
– IgM: 674mg/dl (38-271mg/dl) LDH: 512 U/L (WNL)
Case continued
Treatment:
– Ibrutinib 420 mg daily + Rituximab 325 mg/m2 monthly q 2 months
Results:
– Clinical CR at 3 months. Remission>3 years
Complications:
– Reactivation of Hepatitis
– Ecchymosis and Epistaxis
– Carbuncles
– Atrial Fibrillation
Bone Marrow, Left Posterior Iliac Crest, Aspirate
Smears, Touch Imprints, Core Biopsy and Clot Sections:
Bone Marrow, Left Posterior Iliac Crest, Aspirate
Smears, Touch Imprints, Core Biopsy and Clot Sections:
Differential Diagnosis of WM
• Lymphoplasmacytic lymphoma – small B cell lymphoma
with plasmacytic differentiation which does not meet
criteria for other small B neoplasms
– Waldenstrom macroglobulinemia is LPL with marrow
involvement and IgM paraprotein
• Marginal zone lymphoma – abundant, clear cytoplasm
• CLL/SLL – usually CD5+, proliferation centers
• IgM MGUS 1.8-2% annual progression rate: 40-90%
progress to WM
Relative Frequencies of B-cell Lymphoma Subtypes:
LPL 1.4%
LP L
Manifestations of WM Disease
Adenopathy,
splenomegaly
≤20% at diagnosis;
50-60% at relapse.
Hb>>> PLT> WBC
Hyperviscosity Syndrome:
Epistaxis, Headaches
Impaired vision
>6,000 mg/dL or >4.0 CP
Treon S., Hematol Oncol. 2013; 31:76-80.
IgM Neuropathy (22%) - (anti-MAG, anti-GM1)
Cryoglobulinemia (10%)
Cold Agglutinemia (5%)
Acquired von Willebrand Disease
Schnitzler Syndrome
Hepcidin
Fe Anemia
Bone Marrow
Hyperviscosity Related Retinal Changes in WM
• Retinal vein dilatation seen IgM >3,000 mg/dL
• Retrograde flow and hemorrhages >6,000 mg/dL
Stone and Bogen, Blood 2012: 119(10):2205-8; Menke et al,
Arch Opthal 2006; 124(11):1601-6.
Photomicrograph (Left) courtesy of Marvin Stone M.D.
Genetics
• No specific chromosomal or oncogene abnormalities are
recognized in LPL
• Deletion of 6q21-q23 (40-70%) most common
aberration; trisomy 4
• Multiple other reported abnormalities including
translocations, trisomies etc.
• Familial predisposition (20-25%)
• Ashkenazi Jews (20%)
• Rare in African Americans (5%)
Kyle et al, Blood 2003; 102(10): 3759-64; Treon et al,
Ann Oncol 2006; 17(3): 488-94; Hanzis et al,
Clin Lymph Myeloma 2011; 11(1):88-92.
Overall Survival Trends in WM (SEER)
N=5,784
2001-2010 Median OS 8.2 y
1991-2000 Median OS 6.0 y
long-rank P<0.001
Castillo et al, BJH 2015; 169:81-89.; Olszlewski et al, ASH 2015; Abstract 882
NCCN Guidelines for Initiation of Therapy in WM
• Hb ≤10 g/dL on basis of disease
• PLT <100,000 mm3 on basis of disease
• Symptomatic hyperviscosity
• Moderate/severe peripheral neuropathy
• Symptomatic cryoglobulins, cold agglutinins,
autoimmune-related events, amyloid.
Kyle RA, et al. Semin Oncol. 2003;30(2):116-120;
Anderson et al, JNCCN 2012; 10(10):1211-9.
NCCN Guidelines Version 2.2016 Waldenström’s Macroglobulinemia/Lymphoplasmacytic Lymphoma
Primary Therapy of WM with Rituximab
Regimen ORR VGPR/CR TTP (mo)
Rituximab x 4 25-30% 0-5% 13
Rituximab x 8 40-45% 5-10% 16-22
Rituximab/thalidomide 70% 10% 30
Rituximab/cyclophosphamide
i.e. CHOP-R, CVP-R, CPR,
CDR
70-80% 20-25% 30-36
Rituximab/nucleoside analogues
i.e. FR, FCR, CDA-R
70-90% 20-30% 36-62
Rituximab/Proteasome Inhibitor
i.e. BDR, VR, CaRD
70-90% 20-40% >42-48
Rituximab/bendamustine 90% 30-40% 69
Reviewed in Dimopoulos et al, Blood 2014; 124(9):1404-
11; Treon et al, Blood 2015; How I Treat WM
Rituximab induced IgM Flare in WM Patients
Treon SP, et al. Ann Oncol. 2004;15(10):1481-1483.
P denotes patient-required plasmapheresis
for hyperviscosity.
14,000
12,000
00 2 4 6 8 10
Weeks
Seru
m I
gM
(m
g/d
L)
10,000
8000
6000
4000
2000
12 14
WM 1WM 2WM 3WM 4WM 5WM 6WM 7WM 8WM 9WM 10WM 11
P
P
P
PP
P
P
Bendamustine-R vs. CHOP-R: Subset Analysis
Rummel et al, Lancet. 2013 Apr 6;381(9873):1203-10.
WM
Nucleoside Analogues in WM
• Risk of Transformation or MDS/AML is 10-15%;
• Risk of secondary malignant events in 1/3 patients
with FCR;
• Stem cell collection impacted by nucleoside
analogues: avoid in ASCT candidates;
• Consider Impact on future therapy (Bendamustine)
Treon et al, Blood 2008; 113(16):3673-8; Leleu et al, JCO 2009; 27(2):
250-5; Thomas et al, Proc. 5th International Workshop on WM 2008; Treon
et al, Clin Lymphoma 2011; 11(1):133-5. Tdeschi et al, ASH 2015; Abstract
3958.; Vos et al, BJH 2015.
100
0
25
50
75
Aliv
e o
r w
ith
ou
t p
rog
ress
ion
(%
)
0 20 40 60 80 100
Time from treatment initiation (months)
120
Observation vs. Maintenance Rituximab in WM
No Rituximab Maintenance
Rituximab Maintenance
PFS100
0
25
50
75
Aliv
e (
%)
0 20 40 60 80 100
Time from treatment initiation (months)
120
OS
No Rituximab Maintenance
Rituximab Maintenance
N = 248
Observation Maintenance p=
Median OS
116 months >120 months 0.0095
Observation Maintenance p=
Median PFS
28.6 months 56.3 months 0.0001
Treon et al, BJH 2011;154(3):357-362.
N=246
Comparative outcomes of immunochemotherapy
regimens in Waldenström macroglobulinaemia
British Journal of Haematology, 2017, 179, 106-115
Comparative outcomes of immunochemotherapy
regimens in Waldenström macroglobulinaemia
British Journal of Haematology, 2017, 179, 106-115
Comparative outcomes of immunochemotherapy
regimens in Waldenström macroglobulinaemia
British Journal of Haematology, 2017, 179, 106-115
Dexamethasone, rituximab and cyclophosphamide for
relapsed and/or refractory and treatment‐naïve patients
with Waldenström macroglobulinemia
British Journal of Haematology, 2017, 179, 98-105
NCCN Guidelines Version 2.2016 Waldenström’s Macroglobulinemia/Lymphoplasmacytic Lymphoma
MYD88 L265P Somatic Mutation in WM
MYD88L265P confirmed by AS-
PCR in 95% WM patients, 50-
80% IGM MGUS.
C to G at position 38186241
at 3p22.2Acquired UPD at 3p22.
Treon et al, NEJM 367:826, 2012
MYD88 L265P by AS-PCR is a Useful
Molecular Diagnostic Marker for WM
WM WM
HD IGG IGM CLL MM MZL WM ----MGUS----
0% 0% 54% 4% 0% 10% 93%
Xu et al, Blood 2013; 121 (11): 2051-8.
MYD88
Treon et. Al. “MYD88 L265P Somatic Mutation in
Waldenstrom’s Macroglobulinemia.” N Engl Med 2012.
WHIM-like CXCR4 C-tail Mutations in WM
Warts, Hypogammaglobulinemia, Infection,
and Myelokathexis
B • 30-40% of WM
patients
• > 30 Nonsense and
Frameshift Mutations
• Almost always occur
with MYD88L265P
Hunter et al, Blood 2013; Rocarro et al, Blood 2014; Poulain et al,
ASH 2014; Schmidt et al, BJH 2014.
MYD88 and CXCR4 Mutation Status Impacts
Clinical Presentation of WM Patients
Treon et al, Blood 2014; 123(18):2791-6.
MYD88 WT L265P L265P L265P
CXCR4 WT WT FS NS
MYD88 WT L265P L265P L265P
CXCR4 WT WT FS NS
Summary of key findings by MYD88 and CXCR4 mutation
status
Summary of key findings by MYD88 and CXCR4 mutation
status
Summary of key findings by MYD88 and CXCR4 mutation
status
Multicenter study of Ibrutinib in
Relapsed/Refractory WM (>1 prior therapy)
Study O
Opened May 2012 R. Advani L. Palomba
420 mg po qD
Ibrutinib
Progressive Disease (PD) or
Unacceptable Toxicity Stable Disease or Response
Continue
Stop Ibrutinib
Event Monitoring
Event Monitoring
Screening
Registration
www.clinicaltrials.gov
NCT01614821
Baseline Characteristics for Study Participants (n=63)
Median Range
Age (yrs) 63 44-86
Prior therapies 2 1-9
Hemoglobin (mg/dL) 10.5 8.2-13.8
Serum IgM (mg/dL) 3,520 724-8,390
B2M (mg/dL) 3.9 1.3-14.2
BM Involvement (%) 60 3-95
Adenopathy >1.5 cm 37 (59%) N/A
Splenomegaly >15 cm 7 (11%) N/A
Treon et al, NEJM 2015; 372:1430
Serum IgM and Hb Levels Following Ibrutinib
0
1000
2000
3000
4000
5000
6000
7000
8000
9000
Basel
ine
Cyc
le 2
Cyc
le 3
Cyc
le 6
Cyc
le 9
Cyc
le 1
2
Cyc
le 1
5
Cyc
le 1
8
Cyc
le 2
1
Seru
m I
gM
(m
g/d
L)
BestIgMResponse:3,520to880mg/dL;p<0.001
N=63
BestHemoglobinResponse:10.5to13.8;p<0.001
8
9
10
11
12
13
14
15
16
Bas
eline
Cyc
le 2
Cyc
le 3
Cyc
le 6
Cyc
le 9
Cyc
le 1
2
Cyc
le 1
5
Cyc
le 1
8
Cyc
le 2
1
N=63
He
mo
glo
bin
(g
/dL
)
Serum IgM Hb
Best Hemoglobin Response:10.5 to 13.8; p<0.001
Best IgM Response: 3,520 to 880 mg/dL; p<0.001
Treon et al, N Engl J Med. 2015; 372(15):1430-40.
Best Clinical Responses to Ibrutinib
Median duration of treatment: 19.1 (range 0.5-29.7) months
(N=) (%)
VGPR 10 16
PR 36 57
MR 11 17
ORR: 91% Major RR (> PR): 73%
Median time to > MR: 4 weeks
Median time to > PR or better: 8 weeks
Treon et al, N Engl J Med. 2015; 372(15):1430-40.
Progression-free and Overall Survival for 63
Previously WM Patients Treated with Ibrutinib
2 yrs (69%) 2 yrs (95%)
PFS OS
Treon et al, N Engl J Med. 2015; 372(15):1430-40.
Ibrutinib Related Adverse Events in Previously
Treated WM Patients
0 5 10 15 20
Mucositis
Hypertension
Pre/Syncope
Dehydration
Epistaxis
Post-procedure bleed
Diarrhea
Skin Infection
Lung Infection
Arrythmia
Thrombocytopenia
Anemia
Neutropenia
Grade 2
Grade 3
Grade 4
Toxicities >1 patient; N=63
Treon et al, N Engl J Med. 2015; 372(15):1430-40.
Responses to Ibrutinib are Impacted by MYD88
(L265P and non-L265P) and CXCR4 Mutations
MYD88MUT
CXCR4WT
MYD88MUT
CXCR4WHIM
MYD88WT
CXCR4WT
p-value
N= 36 21 5
OverallRR
100% 85.7% 60% <0.01
MajorRR
91.7% 61.9% 0% <0.01
2 patients subsequently found to have other MYD88 mutations not picked up by AS-PCR
Treon et al, N Engl J Med. 2015; 372(15):1430-40;
NEJM 2015; Letter, August 6, 2015.
Kinetics of Major Responses Following Ibrutinib
Therapy in Genotyped WM Patients
Treon et al, NEJM 372: 1430, 2015
MYD88L265P
CXCR4WT
MYD88L265P
CXCR4WHIM
MYD88WT
CXCR4WTMajo
r R
esp
on
ses (
%)
3 6 9 12 15 18 21 24
Cycle
Ibrutinib in Rituximab-Refractory Patients with
WM: INNOVATE Study Design
Dimopoulos M et al, ASH 2015 (abstract 2745, poster presentation)
INNOVATE: Best Response to Ibrutinib
Dimopoulos M et al, ASH 2015 (abstract 2745, poster presentation)
INNOVATE: Median Hemoglobin and IgM Levels
During Early Follow-up
Dimopoulos M et al, ASH 2015 (abstract 2745, poster presentation)
BCL-2 is overexpressed in primary WM patient cells by next generation
sequencing (RNAseq) in MYD88 and CXCR4 mutated and unmutated
patients
BCWM1 BCWM2 WMCL1 PB B-Cell Memory B-Cell WM L265P+ WM L265P+WHIM+ WM WT
BCL2 by Healthy Donor B-Cells, WM Cell Lines, and Primary Patient Samples
Nor
mal
ized
Rea
d C
ount
s
5000
1500
025
000
3500
0
Healthy Donor
CD19+CD27-
Healthy Donor
CD19+CD27+
WM CD19+
MYD88L265P
CXCR4WT
WM CD19+
MYD88L265P
CXCR4WHIM
WM CD19+
MYD88WT
CXCR4WT
p<0.001 for healthy donor samples versus any MYD88L265PCXCR4WT or WHIM
Castillo et al, ICML 2015; Hunter et al, ASH 2015; Abstract 128
Venetoclax (ABT-199) Shows Pre-clinical and
Clinical Activity in WM
Cao et al, BJH 2015; Gericitano et al, ASH 2015. Abstract 254.
N=4
ORR=100%; all
major responders
PFS: 18, 25, 38+,
40+ months.
0
5
10
15
20
25
30
35
40
45
50
WM5 WM6 WM7
DMSO
IB
ABT
ABT+IB
0
10
20
30
40
50
60
70
80
90
WM1 WM2 WM3 WM4
DMSO
IB
ABT
ABT+IB
Untreated
* *
* *
*CXCRWHIM
%
%
%
%
%
%
%
%
%
%
%
%
%
%
%
%
%
%
%
%
%
SDF-1
CXCR4
Ser346/7
Β-arrestins
GRK 2/3
CXCR4 Signaling in WM Patients with WHIM Mutations
Busillo et al, JBC 2010
Mueller et al, PLOS ONE 2013
Cao et al, Leukemia 2014
Rocarro et al, Blood 2014
Cao et al, BJH 2015
ERK
AKTSURVIVAL
DRUG RESISTANCE
Plerixafor
Ulucuplomab
Y
Peripheral Neuropathies in WM
• 20-30% of WM patients; associated with low sIgM
• Usually a sensory IgM demyelinating neuropathy related
to antibodies targeting:
– Myelin Associated Glycoprotein
– Ganglioside M1
– Sulfatide
• Amyloid neuropathy is rare and associated with axonal
degeneration
• Bing-Neel Syndrome (1%) – CNS involvement
Treon et al, ASCO 2010; Photomicrograph Courtesy Todd Levine, MD
MAG IgM
Baldini et al, Am J Hematol 1994; 45(1):25-31; Treon et al,
J Clin Oncol 2010; 28:15S (Abstract 8114).
Photomicrograph courtesy of Todd Levine, M.D.
Symptomatic Improvement of WM Related PN
Treon et al, J Clin Oncol 28:15s, 2010 (suppl; abstr 8114)
N=148
Severe Cryoglobulinemia in a WM PatientP
re-P
here
sis
Po
st-
Ph
ere
sis
Treon and Merlini, Williams Hematology 8th ed., Ch 111, 2010.
Transformed Waldenström macroglobulinaemia: clinical presentation
and outcome. A multi‐institutional retrospective study of 77 cases from
the French Innovative Leukemia Organization (FILO)
Progression‐free survival and overall survival from histological transformation (HT).
British Journal of Haematology, 2017, 179, 439-448
• WM can present with broad symptomatology. Asymptomatic
patients should be observed.
• Treatment options include rituximab alone and in combination.
Objectives as well risks of therapy should be considered when
making treatment choices.
• MYD88 and CXCR4 mutations are common in WM. MYD88
activates BTK and HCK in WM cells.
• Ibrutinib represents a novel treatment option for WM. MYD88
and CXCR4 mutation status impacts ibrutinib responses.
• Inhibitors for MYD88, CXCR4 and BCL2 pathways represent
novel treatment approaches for WM.
Summary