Download

Intraperitoneal chemotherapy for epithelial ovarian cancer






Advertisement
/ 74 []
Download Presentation
Comments
leia
From:
|  
(1177) |   (0) |   (0)
Views: 27 | Added:
Rate Presentation: 0 0
Description:
Intraperitoneal chemotherapy for epithelial ovarian cancer. Hua-His Wu, MD OB/GYN, VGH-TPE. Epithelial ovarian cancer. Standard therapy A maximum cytoreductive surgery followed by combination chemotherapy with paclitaxel and carboplatin A chemo-sensitive tumor However, most recur
Intraperitoneal chemotherapy for epithelial ovarian cancer

An Image/Link below is provided (as is) to

Download Policy: Content on the Website is provided to you AS IS for your information and personal use only and may not be sold or licensed nor shared on other sites. SlideServe reserves the right to change this policy at anytime. While downloading, If for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.











- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -




Slide 1

Intraperitoneal chemotherapy for epithelial ovarian cancer

Hua-His Wu, MD

OB/GYN, VGH-TPE

Slide 2

Epithelial ovarian cancer

  • Standard therapy

    • A maximum cytoreductive surgery followed by combination chemotherapy with paclitaxel and carboplatin

  • A chemo-sensitive tumor

  • However, most recur

  • Intraperitoneal spreading

Slide 3

History of IP C/T

  • Weisberger 1955

    • Nitrogen mustard intraperitoneally for malignant ascites

  • Jones 1978

    • signicantly greater concentrations of certain chemotherapeutic drugs in the peritoneal cavity than in the blood.

  • SWOG/GOG

    • The first phase III trial

    • since 1980s, presented in 1996

    • In favor of IP arm

Slide 5

NCI announcement 2006

  • Encouraging the GO community to consider IP chemotherapy as the standard treatment for optimally debulked advanced ovarian cancer patients

  • Based on a meta-analysis of three US trials and other phase III studies

Slide 6

However, IP chemotherapy is still regarded as controversial issue.

Why

Slide 7

IP Chemotherapy

  • Principles

  • Pharmacology

  • Clinical aspects

  • Toxicities and QOL

  • Future directions

Slide 8

Principles of IP C/T

Slide 9

Basic pharmacologic concept of IP C/T

Slide 10

What is the ideal anticancer agent for IP C/T?

  • Very effective systemically against ovarian cancer

  • Penetrate deep into the tumor

  • Stays in the peritoneal cavity for prolonged period

  • Low incidence of systemic adverse effect but providing satisfactory drug concentrations in the inner core of tumor

(有效 夠深 留得久)

Slide 11

Basic concept of IP C/T

  • Penetration

  • Peritoneal dwelling

  • Solute transport model

  • Anatomy of the peritoneum and capillary vessels

  • Resistance to solute transport

Slide 12

Penetration of anticancer agents

  • Doxorubicin

    • 4-6 layers (Ozols et al; Durand et al)

  • Methotrexate

    • By osteosarcoma spheroids and autoradiographs (West et al)

    • Limited ability in avascular tumor mass & ≧ 250 μm in dia.

  • Vinblastine & 5-FU

    • In glioma spheroids (Nederman and Carlsson))

    • Penetration : 5-FU > vinblastine

  • Cisplatin

    • In mouse model (Los et al)

    • Concentration

      • in peripheral: IP > IV

      • In center : IP = IV

Slide 13

Peritoneal dwelling of anticancer drugs

  • Longer stay of anticancer agents

  • Higher drug concentration in the inner core

    Is a contrary phenomenon

Slide 14

Anatomy of the peritoneum

  • Primary interface between abdominal cavity & vessels

  • Parietal peritoneum (10%) & visceral peritoneum (90%)

  • The area is approximately to the body surface area (1.0 -2.0 cm2)

  • Components

    • Mesothelium

    • Basement membrane

    • Interstitium

    • Microcirculation

    • Visceral lymphatics

Slide 15

Mesothelium, Interstitium

  • Mesothelium

    • Monolayer of flattened cells about 0.5 mm thick

    • Tight junction ; Gap junction

    • Absence of tight junction in the subdiaphragmatic area  directly absorbed into the lymphatic system

  • Interstitium

    • The supporting structure

    • Distance varies

Slide 16

Blood vessels

  • Visceral peritoneum

    • Supplied by celiac and mesentary arteries with venous drainage via the portal vein

    • Rapid firstpass metabolism by the liver

  • Parietal peritoneum

    • Supplied by circumflex iliac, lumbar, intercostal, and epigastric arteries with venous drainage via the systemic circulation.

  • Effective peritoneal surface area

    • The density of the number of perfused capillaries

    • The number and the size of pores within the capillaies

Slide 17

Peritoneal lymphatics

  • Extensive in the subdiaphragmatic area

    • stoma exist,

    • basement membrane absent

    • Little resistance for the solute transport

  • Also present in parietal and visceral peritoneum

  • To maintain the relatively small volume of fluid (50-100 ml)

Slide 18

Mechanism of solute transport between peritoneal cavity and capillary lumen

Slide 19

Theoretical behaviors of anticancer agents

  • Larger molecular weight or water-insolubleanticancer drugs stay longer in the peritoneal cavity

  • Smaller molecular weight or water-soluble  can go into the inner core but stay shorter in the cavity

  • Small molecular weight agents that are metabolized in the liver to become active form should not be used for IP C/T.

  • Small molecular weight agents with already active form are suitable for IP C/T

Slide 20

Pharmacologic advantage for IP C/T

(Modified from Markman M, Semin Oncol 1991)

Slide 21

Choice of drugs

  • If the IP C/T is considered to be a regional therapy

     paclitaxel, mitoxantrone

  • If the IP C/T is hypothesized as a route of systemic chemotherapy

     platinum agents

Slide 22

Pharmacology of IP drugs

  • Cisplatin

  • Carboplatin

  • Paclitaxel

Slide 23

Cisplatin

  • P/V ratio: peak 21; AUC 12 (Howell, 1982)

  • The mode of administration did not affect systemic toxicity(Pretorius, 1981)

  • The amount of drug recovered in the urine and the drug levels within the tissues were similar

  • The peritoneal lining had 2.5-8 times higher levels of drug after IP administration

     IP C/T might increase the therapeutic index for small tumors confined to the peritoneal cavity

Slide 24

Carboplatin

  • After 4 hrs dwelling, P/V ratio:

    • Peak: 24; AUC 10 (Elferink, 1998)

  • Pharmacologic study after IP and IV (Miyagi, 2005)

    • 24-hr free platinum AUC in the serum is identical

    • 24-hr free platinum AUC in the peritoneal cavity was 17 times higher when which given via IP

       IP infusion of carboplatin is feasible not only as an IP regional therapy but also as a more reasonable route for systemic chemotherapy

  • The recommended dose of IP carboplatin was 400 mg/m2

    (Speyer and Sorich, 1992)

Slide 25

Paclitaxel

  • Dose-limiting toxicity: severe abdominal pain (when dose ≧175 mg/㎡)

  • P/V ratio: peak & AUC : 1000-fold

  • Paclitaxel persisted in peritoneum for more than 24-48 h after a single IP instillation

    (Markman, 1992)

  • Very slow peritoneal clearance

    (at dose level ≧ 60 mg/㎡, it can persist more than 1 wk with significant level  wkly IP Taxol )

  • Low plasma concentration

    (Francis, 1995)

Slide 26

IP agents and risk

(Makhija et al, 2001)

Slide 28

Strengths of IP C/T

  • Achieve dose intensification (as ‘high-dose’)

  • Treats both intraperitoneal tumor bed and extraperitoneal tumor via systemic recirculation

  • Reaches IP sites that may not be reached by IV route, especially when up to 2L dialysate are administered

  • Onion skinning effect– IP cisplatin can penetrate as far as 4mm into surface of IP tumors(by definition, <1cm in size) and up to 6 repeated administrations

Slide 30

Clinical aspects of IP C/T

  • Front-line chemotherapy

  • Consolidation

  • 2nd-line chemotherapy

Slide 31

Phase III trials of IP vs IV cisplatin-based chemotherapy

(Hamilton, 2006)

Slide 33

Main results

  • Eight randomized trials studied 1819 women receiving primary treatment for ovarian cancer.

  • Women were less likely to die if they received an intraperitoneal (IP) component to the chemotherapy (hazard ratio (HR) =0.79; 95% confidence interval (CI): 0.70 to 0.90)and the disease free interval (HR =0.79; 95%CI: 0.69 to 0.90) was also significantly prolonged.

  • There may be greater serious toxicity with regard to gastrointestinal effects, pain and fever but less ototoxicity with the intraperitoneal than the intravenous route.

Slide 34

Hazard ratio for time to recurrence (IP vs IV C/.T)

Slide 35

Hazard ratios for time to death (IP vs IV C/T)

Slide 36

GOG 104(Alberts et al, 1996)

OS

Slide 37

GOG 104: conclusions

  • As compared with IV cisplatin, IP cicplatin significantly improves survival and has significantly lower toxic effects in patients with stage III ovarian cancer and residual tumor mass of 2cm or less.

  • The only same “dose-intensity” in both arms phase 3 RCT

Slide 38

Shorts of GOG 104

  • GOG 111

    • Median survival from 24 months (P+C) to 38 months ( P+T)

Slide 39

GOG 114(Markman et al, 2001)

PFS

OS

Slide 40

GOG 114: conclusions

  • The 2nd phase 3 RCT to show IP cisplatin is superior to IV cisplatin in small volume residual advanced ovarian cancer

  • The 1st phase 3 trial in ovarian cancer to a median survival of >5 years

  • Trial demonstrated that IP cisplatin favorably impacts survival, even through IV paclitaxel is a component of regimen

Slide 41

Shorts of GOG 114

  • More complications in IP arm

    • Neutropenia, thrombocytopenia

    • G-I & metabolic toxicities

  • Carbopltin x 2 cycles ( AUC 9)

Slide 42

GOG 172(Armstrong et al, 2006)

PFS

OS

Slide 43

GOG 172residual tumor size & survival

Slide 44

GOG 172: conclusions

  • Significantly survival benefit in IP arm

  • The 65.6 months median survival is the longest survival reported to date from a randomized trial in advanced ovarian cancer

Slide 45

Shorts of GOG 172

  • The IP regimen uses higher and more frequent dosing than the IV regimen

  • Toxicities were greater on the IP arm

  • Fewer patients on the IP arm were able to complete 6 cycles of therapy

Slide 47

VGH-TPE: conclusions

  • Intravenous and intraperitoneal chemotherapy are associated with equivalent survival in patients with minimal residual stage III epithelial ovarian cancer after optimal cytoreductive surgery (<1m).

  • PEC or PAC regimens

Slide 48

NCI Clinical Announcement, 1/5/06Pooled survival benefit of IP regimens

  • Progression-free survival

    • HR=0.79 (95%CI: 0.70-0.90)

  • Overall survival

    • HR=0.79 (95%CI: 0.70-0.89)

Slide 49

New problems

  • The role of carboplatin

    • GOG 158 (non-inferiority test)

    • GOG 114 (moderately high dose IV Carboplatin before IP C/T)

    • Cross-trial GOG172 vs GOG 158

  • How many coursesof IP C/T is adequate?

  • Effect of Dose intensity?

    • IP regimen uses higher and more frequent dosing schedule than the IV regimen

Slide 50

Cross-trial comparison of GOG 172 and GOG 158

Slide 51

GOG 172: eligible patients in IP arm

  • Although fewer than half the patients assignedto the IP group received six cycles of IP treatment, the group as a whole had a significant improvement in survival as compared with the intravenous group. It is possible that most of the benefit of IP therapy occurs early, during the initial cycles, or that the benefit of IP therapy may be greater if more patients can successfully complete six cycles of treatment.

Slide 53

IP C/T as Consolidation

(Hamilton, 2006)

Slide 54

Potential IP consolidation regimens

  • Cisplatin alone (50 mg/m2)

  • Cisplatin + topotecan

  • Cisplatin + FUDR

Slide 56

IP C/T as 2nd-line C/T

  • Phase I or II studies

  • IP C/T is safe, feasible, and pharmacokinetically advantageous, but responses varied widely.

  • Critical factors for response

    • Tumor burden at initial treatment

    • Paltinum sensitivity

  • Few candidates for 2nd-line IP C/T

    • Those with stage IV, macroscopic, platinum-resistant, or extraperitoneal dz are less likely to be benefit

    • Extensive adhesion

    • 2nd-look op become rare recurrence is detected by palpable or imageable lesions and symptoms.

Slide 58

More Considerations

  • Catheter issues

  • Patient selection

  • Toxicity and QOL

Slide 59

Complications of Catheter

  • Blockade

  • Leakage

  • Infection

  • Diarrhea

  • Bowel perforation

  • Fistula formation

Slide 60

Catheter issuesTiming of placement

  • 34% discontinued IP C/T for catheter-specific complications (Walker et al, GO,2006)

  • Not associated with complication rate

  • Pre-operative counseling, if possible

  • Laparotomy, laparoscopy

  • Close the vaginal cuff

Slide 61

Catheter issuesTypes of Catheter

  • Tenckhoff peritoneal dialysis catheter

  • Subcutaneous port implantation

    • Port-A-cath

    • BardPort peritoneal catheter system

  • JP, CWV catheters

  • Veress needles

Slide 62

Tenckhoff tube

Slide 63

Bardport catheter system

Slide 64

Catheter issuesSite of port placement

  • Goal

    • To minimize patient discomfort, and

    • Facilitate ease of access

  • Port site

    • Superior and medial to the iliac crest, or

    • On the inferior thorax, at the midclavicular line, overlying the ribs.

Slide 65

Common port sites

2

1

Slide 66

Patient selection issues

  • Patient characteristics

    • eg.: renal function ; neuropathy (DM –associated)

  • Significant peritoneal adhesion

  • Ongoing abdominal infection, or indwelling IP catheter becomes infected or malfunction, will be unable to treated by this route of drug delivery

  • Size of residual tumor masses

    • <0.5 cm, 1cm, or 2 cm ?  Onion skinning

  • Lt colon or rectosigmoid colon resection ?

Slide 67

Toxicity and QOL

  • In GOG172, in IP more

    • Bone marrow suppressions,

    • constitutional,

    • G-I,

    • neurologic symptoms,

    • and infections

Slide 68

Who said all IP cisplatin therapy is more toxic than IV cisplatin therapy?

(GOG 104)

Slide 69

Quality of LifeGOG 172

Slide 70

How to reduce the toxicities from IP C/T?

  • IP cisplatin-related toxicites

    • Replacing cisplatin with carboplatin

    • GOG phase I study:

      IP carboplatin (AUC 6-7) + IV Taxol (175 mg/m2, 3hr)

  • IP Paclitaxel-related toxicities

    • IV Docetaxel: less neurotoxic than Taxol

      (SCOTROC trial)

    • IP Docetaxel  no dose-limiting toxicities

      (Morgan et al)

  • IP catheter-related toxicities

Slide 72

Conclusion

  • IP cisplatin-based C/T has been shown to have a survival benefit over IV cisplatin-based C/T for advance ovarian cancer patients with optimal debulking.

  • However, there are a number of unanswered questions that should be resolved before IP C/T becomes truly a standard care in the ovarian cancer.

Slide 73

Future Directions

Is IP administration of carboplatin replacable to IP cisplatin as a less toxic alternative?

Is IP administration of paclitaxel necessary or IP administration of docetaxelacceptable?

What is the optimal number of IP treatment?

What is the optimal timing for the IP catheter placement and what is the optimal type and material?

Is IP C/T for ovarian cancer with bulky residual tumor as effective as those for small residual tumor?

How effective is IP C/T for retroperitoneal lymph node metastasis?


Copyright © 2014 SlideServe. All rights reserved | Powered By DigitalOfficePro