Publications by authors named "John Liao"

Background: For best efficacy, vaccines must provide long-lasting immunity. To measure longevity, memory from B and T cells are surrogate endpoints for vaccine efficacy. When antibodies are insufficient for protection, the immune response must rely on T cells.

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  • Denileukin diftitox (ONTAK) is a fusion protein that can deplete regulatory T cells, which are linked to poor outcomes in ovarian cancer, and this study aimed to assess its safety and effects when given directly into the abdomen of patients with advanced ovarian cancer.
  • A phase I trial included 10 patients who received ONTAK at escalating doses, revealing a maximum tolerated dose of 15 μg/kg with mostly mild side effects, though one patient experienced a severe reaction at the highest dose.
  • While some patients showed a decrease in CA-125 levels (a marker for ovarian cancer), there were no significant changes in the overall cancer response, although ONTAK successfully reduced regulatory T cells in both blood and
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Advanced gynecologic cancers have historically lacked effective treatment options. Recently, immune checkpoint inhibitors (ICIs) have been approved by the US Food and Drug Administration for the treatment of cervical cancer and endometrial cancer, offering durable responses for some patients. In addition, many immunotherapy strategies are under investigation for the treatment of earlier stages of disease or in other gynecologic cancers, such as ovarian cancer and rare gynecologic tumors.

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Bevacizumab has demonstrated significant benefit in recurrent ovarian, fallopian tube and peritoneal cancer (OC), but its optimal position within the sequence of systemic therapies remains controversial. Since rebound progression after bevacizumab has been observed in other cancers, and because bevacizumab is incorporated in several regimens used in the recurrent setting, the duration of treatment may impact survival. We sought to identify whether earlier bevacizumab exposure is associated with prolonged bevacizumab therapy and survival by conducting a multi-institution retrospective study of recurrent OC patients treated with bevacizumab from 2004-2014.

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Current screening methods for ovarian cancer (OC) have failed to demonstrate a significant reduction in mortality. Uterine lavage combined with ultra-deep sequencing for the detection of disseminated OC cells has emerged as a promising tool, but this approach has not been tested for early-stage disease or non-serous histologies. In addition, lavages carry multiple background mutations, the significance of which is poorly understood.

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  • The study evaluated the combination of pembrolizumab (an immune checkpoint inhibitor) and carboplatin (a chemotherapy) in patients with recurrent platinum-resistant ovarian cancer, showing generally low response rates but some signs of stability in disease.
  • Among 29 treated patients, only 10.3% achieved a partial response, but 51.7% had stable disease, indicating that while the treatment had limited effectiveness, some patients experienced no further progression.
  • The treatment was relatively well tolerated, with common side effects being mild lymphopenia and anemia, and notable immune responses were observed, particularly in PD-L1-positive patients who fared better overall.
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  • The study investigated a T-helper 1 selective vaccine targeting IGFBP-2 in advanced ovarian cancer patients to elicit strong immune responses and minimize regulatory T cell activity.
  • In a phase I trial involving 25 patients, the vaccine was well tolerated and yielded high levels of IFNγ secreting T cells in 50% of participants, with significant increases in certain T cell subsets.
  • The findings suggest that the IGFBP-2 vaccine effectively promotes desired type I T cell responses while avoiding regulatory T cell generation, indicating its potential for cancer immunotherapy.
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Objective: The presence of tumor infiltrating lymphocytes (TIL) and defects in homologous recombination (HR) are each important prognostic factors in ovarian carcinoma (OC). We characterized the association between HR deficiency (HRD) and the presence of TILs in a cohort of OC patients and the relative contribution to overall survival.

Methods: Patients with carcinoma of the ovary, fallopian tube, or peritoneum were prospectively enrolled.

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Solid organ transplant (SOT) recipients have an approximately 2-fold greater risk of developing and dying from a malignancy compared to the general population. Among the gynecologic cancers, including uterine, cervical, vaginal, vulvar, and ovarian, the HPV-related cancers are known to increase among women posttransplant compared to women in the general population, but less is known about the risk of uterine and ovarian cancers. This review provides an overview of the epidemiology of gynecologic cancers after solid organ transplantation, as well as the pathophysiology, management, and specific risk factors associated with these cancers.

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Objective: The aim of this study was to summarize developments in novel therapeutics for ovarian cancer presented at the Ovarian Cancer Research Symposium held at the University of Washington.

Methods: A symposium of the leaders in ovarian cancer research was convened to present and discuss current advances and future directions in ovarian cancer research.

Results: The fourth session was held on September 13, 2016, and focused on Novel Therapeutics for Ovarian Cancer.

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Objective: The use of robotic radical hysterectomy has greatly increased in the treatment of early stage cervical cancer. We sought to compare surgical and oncologic outcomes of women undergoing robotic radical hysterectomy compared to open radical hysterectomy.

Methods: The clinic-pathologic, treatment, and recurrence data were abstracted through an Institutional Review Board-approved protocol at 2 separate large tertiary care centers in Seattle, Swedish Medical Center and the University of Washington.

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Objectives: To assess a simple algorithm of CA125, HE4 and Symptom Index to predict ovarian cancer in women with a pelvic mass.

Methods: This was a prospective study of women referred to a gynecologic oncology clinic for surgical evaluation of a pelvic mass. Preoperatively, women completed a SI and had serum markers drawn.

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•We report an ovarian cancer patient with a prolonged response to immunotherapy.•Comprehensive genomic profiling may detect patients who benefit from immunotherapy.•Mutational burden thresholds for ovarian cancer may be lower than other cancers.

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Background: Granulocyte macrophage colony-stimulating factor (GM-CSF) stimulates immunity via recruitment of antigen presenting cells and tumor specific T-cell stimulation. Albumin-bound paclitaxel (nab-paclitaxel) followed by GM-CSF may enhance antitumor responses and prolong remissions in ovarian cancer. Immune phenotypes present before treatment may identify responders to chemo-immunotherapy.

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Objective: Bevacizumab was recently approved by the US Food and Drug Administration for use in recurrent platinum resistant epithelial ovarian cancer (EOC), fallopian tube cancer (FTC), or primary peritoneal cancer (PPC) when no more than two prior cytotoxic regimens have been used; due to concerns for gastrointestinal perforation. We sought to determine bevacizumab-related toxicities in heavily pretreated recurrent EOC.

Methods: We performed a retrospective chart review of patients with recurrent EOC, FTC, and PPC from 2001 to 2011.

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Background: Recent policy changes by insurance companies have been instituted to encourage vaginal hysterectomy (VH) as the preferred route for removal of the uterus. It is not known if advantages of VH for benign indications apply to women with gynecologic cancer.

Objective: The goal of this study was to assess trends in surgical approach to hysterectomy among gynecologic cancer patients and to evaluate outcomes by approach.

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Background: Ovarian cancer is immunogenic and residual tumor volume after surgery is known to be prognostic. Ovarian cancer often follows a recurring-remitting course and microscopic disease states may present ideal opportunities for immune therapies. We sought to establish the immune profile of a murine model of ovarian cancer that allows in vivo tumor imaging and the quantitation of microscopic disease.

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Objectives: To measure HE4 levels in urine from normal donors, patients with LMP tumors and ovarian cancer patients and to correlate levels with clinical factors in ovarian cancer patients.

Methods: Archived samples from controls, patients with LMP tumors and ovarian cancer were tested using commercial assays, including serially collected serum and urine samples from women treated for stage III/IV serous ovarian cancer.

Results: Five of 6 patients with stage I/II and 26 of 36 stage III/IV serous ovarian cancer patients had HE4-positive urines, similar to serum samples (4 of 5 stage I/II and 26 of 34 stage III/IV) when tested at the same level of specificity (95%).

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While therapeutic vaccines for ovarian cancer represent only a small fraction of active clinical trials, growing interest in this area and the accumulated data supporting the use of vaccines in cancer treatment portend further expansion of trials incorporating these strategies. This review explores the rationale for the use of vaccines for the treatment of ovarian cancer. It examines vaccine platforms that have been investigated and reviews the data from these studies.

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Objective: To evaluate patterns of recurrence for ovarian, fallopian tube, and primary peritoneal cancer patients undergoing extended treatment with bevacizumab (BEV).

Methods: A retrospective review of patients with primary ovarian, fallopian tube, or peritoneal cancer treated with BEV alone or in combination with other chemotherapy from 2001 to 2011 was performed. Qualified patients were identified by chemotherapy records.

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Objectives: Bevacizumab is a generally well-tolerated drug, but bevacizumab-associated gastrointestinal perforations (BAP) occur in 0 to 15% of patients with ovarian carcinoma. Our goal was to evaluate the clinical predictors of BAP in order to identify factors, which may preclude patients from receiving treatment.

Methods: We conducted a review of patients with recurrent epithelial ovarian carcinoma treated with bevacizumab between 2006 and 2009.

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Objectives: Vaginal dysplasia is associated with prior radiation therapy (RT) for gynecologic malignancies. We reviewed our institution's experience with VAIN in patients who were treated with radiation therapy for a gynecologic malignancy.

Methods: A retrospective review of patients treated for VAIN was performed.

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PDE4 inhibitors have the potential to alleviate the symptoms and underlying inflammation associated with dry eye. Disclosed herein is the development of a novel series of water-soluble PDE4 inhibitors. Our studies led to the discovery of coumarin 18, which is effective in a rabbit model of dry eye and a tear secretion test in rats.

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In the past decade we have witnessed important advances in the treatment of gynecological cancers and have recognized their potential immunogenicity. This has opened the door to explore immune therapy not only in HPV-induced cancers but also in ovarian and endometrial cancers. Here we will review the off-target immune effects of select chemotherapy drugs commonly used to treat gynecologic cancers and novel tools that can stimulate both the adaptive and innate immune mechanisms such as novel pleiotropic cytokines, Toll-like receptors, and powerful antibodies that can target inhibitory checkpoints, thereby activating effector cellular immune mechanisms and neutralizing suppressor cells.

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