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07-05-2012, 06:49 AM
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#1
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Senior Member
Join Date: Mar 2006
Posts: 4,782
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Latest&greatest from Slamon group--Dacomitinib(small molecule irreversble panher TKI
like lapatinib it is a small molecule, not a large antibody so it should cross blood brain barrier. Unlike lapatinib it binds irreversibly (stubbornly, won't let go) to part of her receptor INSIDE the cell) so harder to become resistant to via feedback mechanisms, sounds like it should end up to be an oral medicationand should block the upregulation of other her family members which can cause resistance to herceptin and lapatinib.
Only used in petri dishes so far--article recommends progressing towards clinical trials.
Mol Cancer Ther. 2012 Jul 3. [Epub ahead of print]
Dacomitinib (PF-00299804), a irreversible pan-HER inhibitor, inhibits proliferation of HER2-amplified breast cancer cell lines resistant to trastuzumab and lapatinib.
Kalous O, Conklin D, Desai AJ, O'Brien NA, Ginther C, Anderson L, Cohen DJ, Britten CD, Taylor I, Christensen JG, Slamon DJ, Finn RS.
Source
1Department of Medicine, Geffen School of Medicine at UCLA.
Abstract
The human epidermal growth factor (HER) family of receptors have been pursued as therapeutic targets in breast cancer and other malignancies. Trastuzumab and lapatinib are standard treatments for HER2-amplified breast cancer, but a significant number of patients do not respond or develop resistance to these drugs. Here we evaluate the in vitro activity of dacomitinib (PF-00299804), an irreversible small molecule pan-HER inhibitor, in a large panel of human breast cancer cell lines with variable expression of the HER family receptors and ligands and with variable sensitivity to trastuzumab and lapatinib. Forty-seven human breast cancer and immortalized breast epithelial lines representing the known molecular subgroups of breast cancer were treated with dacomitinib to determine IC50 values. HER2-amplified lines were far more likely to respond to dacomitinib than nonamplified lines (RR = 3.39, p < 0.0001). Furthermore, HER2 mRNA and protein expression were quantitatively associated with response. Dacomitinib reduced the phosphorylation of HER2, EGFR, HER4, AKT, and ERK in the majority of sensitive lines. Dacomitinib exerted its anti-proliferative effect through a combined G0/G1 arrest and an induction of apoptosis. Dacomitinib inhibited growth in several HER2-amplified lines with de novo and acquired resistance to trastuzumab. Dacomitinib maintained a high activity in lines with acquired resistance to lapatinib. This study identifies HER2-amplified breast cancer lines as most sensitive to the anti-proliferative effect of dacomitinib and provides a strong rationale for its clinical testing in HER2-amplified breast cancers resistant to trastuzumab and lapatinib.
PMID: 22761403 [
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07-06-2012, 08:11 AM
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#2
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Senior Member
Join Date: Aug 2010
Location: New York, New York
Posts: 1,580
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Re: Latest&greatest from Slamon group--Dacomitinib(small molecule irreversble panher
This super-fantastic promising!
Karen
__________________
World Trade Center Survivor (56th Floor/North Tower): 14 years and still just like yesterday.
Graves Disease, became Euthyroid via Radioactive Iodine, June 2001.
Thyroid Eye Disease. 2003. Decompression surgery in 2009; eyelid lowering surgery in 2010.
Diagnosed: June 2010, liver mets. ER-/PR+10%; HER2+++.
July 2010: Begin Taxol/Herceptin. Eliminate sugar from diet. No surgery or radiation.
January 2011: NED
April 2011: Progression in liver only. Other previous affected areas eradicated. Stop Taxol/Herceptin after 32 infusions.
May 2011: Brain MRI: clear.
May 2011: Begin Tykerb daily, Xeloda twice per day for one week on, one week off, and Herceptin.
November 2011: Progression in liver. All other tumors remain eradicated.
December 2011: BEGIN TRIAL #09-093 Taxol, MCC-DM1 (T-DM1), Perjeta.
Trial requires scans every six weeks, bloodwork and infusions weekly.
Brain MRI: clear.
January 2012: NED. Liver mets, good riddance!
March 2012: NED. Developed SMA (rare blood clot) in intestinal artery and loss of sight in right eye due to optical nerve neuropathy. Resolved when Taxol removed this month.
Continue Protocol of T-DM1 weekly and Perjeta every 3 weeks.
May 2012: NED.
June 2012: Brain MRI: clear.
June-December 2012: NED.
December 2012: TRIAL CONCLUDED; ENTER TRIAL EXTENSION #09-037. CT, Brain MRI, bone scan: clear. NED.
January-March 2013: NED.
June 2013: Brain MRI: clear. CEA upticking; CT shows new met on liver.
July 3, 2013: DISASTER STRIKES during liver ablation: sloppy surgeon cuts intercostal artery and I bleed out, lose 3.5 liters of blood, have major hemothorax, and collapsed lung requiring emergency resuscitative thoracotomy, lung surgery, rib rearrangement and cutting deep connective tissue, transfusion. Ablation incomplete. This life-saving procedure would end up causing me unforgiving pain with every movement I make, permanently, otherwise known as forever.
July 26, 2013: Try Navelbine/Herceptin. Body too weak after surgery and transfusion. Fever. CEA: Normal.
August 16, 2016: second dose Navelbine/Herceptin; CEA: Normal. Will skip doses. Watching and waiting.
September 2013: NED, Herceptin only. CEA: Normal. Started Arimidex.
October-November 2013: NED. Herceptin and Arimidex. CEA, CA125, 15-3: Normal.
December 2013: Something brewing. PET lights up on little spot on liver; CEA upward trend, just outside normal. PET and triphasic liver scan confirm Little Met. Restart Perjeta with Herceptin, stay on Arimidex. Genomic sequencing completed for future treatments, if necessary.
January 2014: Ablate Little Met on the 6th. Happy New Year.
March 2014: Brain MRI: clear. PET/CT reveal liver mets return; new lung mets. This is not funny.
March 2014: BEGIN TRIAL #10-005 A(11)-Temsirolimus plus Neratinib.
April 2014: Genomic testing indicated they could work, they did not. Very strange drug combo for me, felt weird.
April 2014: Started Navelbine and Herceptin. Needed something tried and true, but had significant progression.
June 2014: Doxil and Herceptin.
July 2014: Progression. Got nothing out of it. Brain: NED.
July 2014: Add integrative medical hematologist-oncologist to my team. Begin supplements. These are tumor-busting, immune system boosters. Add glutathione, lysine and taurine IV infusions every three weeks.
July 2014: Begin Gemzar, Herceptin & Perjeta. Happy.
August 2014: ECHO perfect.
January 2015: Begin weekly Vitamin D Analog infusions. 25 mcg. via port.
February 2015: CT: stable.
April 2015: Gem working, but not 100%. Looking into immunotherapy. Finally, treatments for the 21st century!
April 2015: Penn Medicine. Dendritic cell immunotherapy.
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07-15-2012, 11:48 PM
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#3
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Senior Member
Join Date: Jan 2010
Location: Thousand Oaks, California.
Posts: 199
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Re: Latest&greatest from Slamon group--Dacomitinib(small molecule irreversble panher
This is super exciting, Like Karen I am also on TDM-1 and hoping that it keeps doing its magic, but it is always great to see other things coming down the pipe line. Thanks for sharing.
__________________
Breastfeeding when diagnosed with Her2+ May 2008
Oct 2008 Double mastectomy 22/28 lymph nodes positive
Decline chemotherapy (decision I regret)
Nov 2009 Mets to lungs and bones.
Dec 2009 Start Taxotere and Herceptin, T1, T3 heal completely and lungs are clear, T2 and first rib have lytic lesions. First rib becomes sclerotic. Considered stable.
May 2011, Onc calls progression and I cross over from comparison arm of clinical trial to TDM-1
Brain scan in Sept 2011 showed small tumor in right cerebellum, did Novalis radiation.
Feb 2013 < 1cm tumor in left frontal lobe. Did Novalis in March and latest scan shows no sign of brain metastasis.
Aug 2013 did 36th round of TDM-1 Due to TDM-1 side effects, shortness of breath, and difficulty getting my balance when getting out of bed, agreed with my oncologist to stop TDM-1.
Took a six week break, bone scan showed small uptake on left first rib. CT showed hypodensities in liver (too small to biopsy) and small nodule in lungs (mediastinal).
Started Navelbine weekly. Did one round with Herceptin.
Skipped next 2 rounds, due to neutropenia. Next chemo 7th Nov - have had 3 Neupogen shots, so WBC should look better... Did not tolerate Navelbine well.
December 2013 scans show no sign of active cancer.
March 2014 - currently only on Herceptin - brain MRI clear, PET/CT two nodules in right lung show uptake
May 2014 - stop Herceptin.
Sept 22, 2014 Brain MRI clear :) PET/CT Progression in lungs.
Sept 2014, Xeloda, Tykerb and Herceptin.
Nov 2014 - Decide to take a break from all treatment.
May 2015 - Brain met radiated with Novalis
July 2015 - Have progression in right lung.
Sept 2015 - Perjeta and Herceptin alone after a 9 month break from all treatment.
Nov 2015 - Thoracentesis 1500ml removed from right lung.
Dec 2015 - Two tiny 1mm brain mets radiated in right cerebellum.
Feb 2016 - Thoracentesis 2200ml drained from right lung
Feb 2016 - Stopped Perjeta and Herceptin and started back on Kadcyla as I had no previous progression on it. After 1 cycle of Kadcyla markers begin to drop. On second cycle add Keytruda.
March 2016 - Thoracentesis 1650ml drained from right lung.
April 2016 – Thoracentesis 1500 ml drained from right lung.
June 2016 – CT scan shows progression in right lung, as well as moderate pleural effusion requiring Thoracentesis.
June 2016 – Decide to stop Keytruda, and will do chemosensitivity test through Rational Therapeutics. Plan to continue on Kadcyla for next two cycles.
July 2016 - Start weekly Abraxane with Herceptin. WBRT with hippocampal sparing, Taking Namenda. 15 sessions over 3 weeks.
Aug - Dec 2016 - 2 infusions of Navelbine, very hard on my body and still dealing with anasarca (generalized edema) 1 infusion of Havalen
My doctor wants to put me on hospice.
Dec 23rd 2016 - I am granted compassionate use of Neratanib.
May 31st 2017 - still on Neratinib, feeling good.
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07-16-2012, 07:41 AM
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#4
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Senior Member
Join Date: Feb 2009
Posts: 1,526
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Re: Latest&greatest from Slamon group--Dacomitinib(small molecule irreversble panher
Yep more good news. Just frustrating it takes so long to get to trials and then so long to get approved. Feels like beating her2 bc is now within our grasp, just need the final push!
Ellie
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