Posted: 30 Mar 2013 07:24 AM PDT
Khidhir KG, Woodward DF, Farjo NP, et al. The prostamide-related glaucoma therapy, bimatoprost, offers a novel approach for treating scalp alopecias. Faseb J 2013;27(2):557-67. http://www.fasebj.org/content/
Balding causes widespread psychological distress but is poorly controlled. The commonest treatment, minoxidil, was originally an antihypertensive drug that promoted unwanted hair. We hypothesized that another serendipitous discovery, increased eyelash growth side-effects of prostamide F(2alpha)-related eyedrops for glaucoma, may be relevant for scalp alopecias. Eyelash hairs and follicles are highly specialized and remain unaffected by androgens that inhibit scalp follicles and stimulate many others. Therefore, we investigated whether non-eyelash follicles could respond to bimatoprost, a prostamide F(2alpha) analog recently licensed for eyelash hypotrichosis. Bimatoprost, at pharmacologically selective concentrations, increased hair synthesis in scalp follicle organ culture and advanced mouse pelage hair regrowth in vivo compared to vehicle alone. A prostamide receptor antagonist blocked isolated follicle growth, confirming a direct, receptor-mediated mechanism within follicles; RT-PCR analysis identified 3 relevant receptor genes in scalp follicles in vivo. Receptors were located in the key follicle regulator, the dermal papilla, by analyzing individual follicular structures and immunohistochemistry. Thus, bimatoprost stimulates human scalp follicles in culture and rodent pelage follicles in vivo, mirroring eyelash behavior, and scalp follicles contain bimatoprost-sensitive prostamide receptors in vivo. This highlights a new follicular signaling system and confirms that bimatoprost offers a novel, low-risk therapeutic approach for scalp alopecias.
Possible Mechanism For The Stimulation Of Hair Growth By Bimatoprost
Bimatoprost stimulates eyelash growth in vivo, human scalp hair growth in organ culture, and mouse pelage hair growth in vivo. In our hypothesis, these effects are due to bimatoprost binding to appropriate receptors on the plasma membrane of cells in the regulatory dermal papilla in the hair bulb (middle panel). This probably stimulates intracellular signaling pathways, which trigger alterations in the gene expression of paracrine signals and their extracellular release. Some of these factors would leave the dermal papilla, crossing the basement membrane, isolating it from the rest of the follicle, to stimulate the coordinated activity of the keratinocytes and melanocytes to produce increased hair growth and pigmentation. Red dots indicate FP and/or prostamide F2α receptors, blue arrows indicate direction of movement of paracrine factors.
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Sunday, March 31, 2013
Effective Hair Loss Treatment with Eyelash Growth Drug
Bimatoprost is known as the brand name Latisse. It was used for glaucoma for years and it was found that one of its side effects was eyelash growth. So it was approved for that purpose with the name Latisse. Emerging data show that this drug may also work to reverse hair loss in men and women.
Monday, March 18, 2013
Testosterone+ HCG Preserves Healthy Sperm in Men on Testosterone Replacement Therapy (Injections and gels)
Tung-Chin Hsieh,
Alexander W. Pastuszak, Kathleen
Hwang and Larry I. Lipshultz*,†
From the Division of Urology, University
of California-San Diego (TCH), San Diego, California, Scott Department of Urology, Baylor College of
Medicine (AWP, LIL), Houston, Texas, and Department of Urology (KH), Brown University School of Medicine, Providence, Rhode Island
Materials and Methods: We retrospectively reviewed
the records of hypogonadal men treated with testosterone replacement therapy
and concomitant low dose human chorionic gonadotropin (HCG). Testosterone replacement consisted of daily
topical gel or weekly intramuscular injection with intramuscular human chorionic gonadotropin (500 IU) every
other day.
Serum and free testosterone, estradiol, semen parameters and
pregnancy rates were evaluated before
and during therapy.
Results: A total of 26 men
with a mean age of 35.9 years were included in the study. Mean followup was 6.2 months. Of the men
19 were
treated with injectable
testosterone and 7 were treated with transdermal gel. Mean serum hormone levels before
vs during treatment were testosterone
207.2 vs 1,055.5
ng/dl
(p<0.0001),
free testosterone 8.1 vs 20.4 pg/ml (p = 0.02) and
estradiol 2.2 vs 3.7 pg/ml (p = 0.11). Pretreatment semen parameters were volume 2.9 ml, density 35.2 million per ml, motility 49.0% and forward progression 2.3. No differences in
semen
parameters were observed during greater
than 1 year of followup. No impact on semen parameters was observed as a function of
testosterone formulation. No
patient became azoospermic during
concomitant testosterone replacement and human chorionic gonadotropin therapy. Nine of 26 men
contributed to
pregnancy with the partner during followup.
Conclusions: Low dose human chorionic gonadotropin appears to maintain semen parameters in hypogonadal men on testosterone replacement therapy. Concurrent testosterone replacement and human
chorionic gonadotropin use may preserve fertility in
hypogonadal males who desire fertility
preservation while on testosterone replacement therapy.
***********************
http://www.ncbi.nlm.nih.gov/m/pubmed/15713727/
*************************
More information on HCG+TRT
***********************
Low-Dose Human Chorionic Gonadotropin
Maintains Intratesticular Testosterone in Normal Men with Testosterone-Induced
Gonadotropin Suppression
This study shows that HCG can keep intratesticular (inside
the testes) testosterone - ITT normal even when they are exposed to
testosterone injections. An HCG dose of 500 IU every other day increased ITT to levels higher than baseline. All other doses failed to achieve normalization of
baseline ITT. ITT is crucial for Leydig cells to work properly so that they do
not atrophy (lose volume due to inactivity)
http://www.ncbi.nlm.nih.gov/m/pubmed/15713727/
*************************
More information on HCG+TRT
Labels:
fertility,
HCG,
HCG+TRT,
sperm quality
Saturday, March 16, 2013
Most Men on Androgel and Testim Stop Using Them
Medication Adherence and Treatment
Patterns for Hypogonadal
Patients Treated with Topical
Testosterone Therapy: A Retrospective Medical Claims Analysis
Michael Jay Schoenfeld, MA, Emily Shortridge, PhD, Zhanglin Cui, PhD, and David Muram, MD
Eli Lilly and Company,
Indianapolis, IN, USA DOI:
10.1111/jsm.12114
A B S T R A C T
Introduction. There is limited information on adherence to topical
testosterone replacement therapy (TRT) among hypogonadal
men.
Aim. To determine adherence rates among
men treated with topical
testosterone gels and to examine factors
that may influence adherence, including age, presence of a specific diagnosis, and index dose.
Methods. Included were 15,435 hypogonadal men, from the Thomson Reuters MarketScan® Database, who had an initial
topical testosterone prescription
in 2009 and who were followed
for 12 months.
Main Outcome Measures. Adherence to testosterone was measured by medication possession ratio (MPR), with high adherence
defined as >0.8. Persistence was defined as the
duration of therapy from the index date to the earliest
of the following events: end date of the last prescription, date of the first gap of >30 days between
prescriptions, or end of the study period (12 months).
Results.
Adherence to topical
TRT was low. By 6 months, only
34.7% of patients
had continued on medication; at 12 months, only 15.4%. Adherence rates were numerically similar among men who received
AndroGel® or Testim® topical gels and did not differ among men of different age groups. Approximately 80% of patients initiated at the recommended dose of 50 mg/day. Over time, an increased proportion of
men used a higher dose. This change was
the result of dose escalation, rather than
of greater adherence
among men initiating
therapy
at a high dose.
Dose escalation was seen as early
as 1 month into therapy.
Approximately
50%
of men who discontinued treatment resumed therapy; most men used the same medication
and dose.
Conclusions. Discontinuation
rates are high among
hypogonadal men treated
with testosterone gels, irrespective of their age, diagnosis, and index dose. Further study, evaluating other measurable factors associated with low adherence among patients
receiving topical TRT, may lead to interventions designed to improve adherence
with therapy.
COMMENTS:
About 50% of patients who were followed over time resumed
TRT. It
is possible that some patients experienced alleviation of symptoms and were not sure they needed to remain on therapy. Once therapy
was discontinued and symptoms recurred in some patients, the benefits of
replacement therapy may have become clearer; thus,
prompting
these men
to restart
therapy at the same effective
dose.
An important
limitation of the study is that claims
data do not include important patient level data, such as symptoms, reasons
for discontinuation (e.g., application
method), side effects (e.g., skin reaction), testosterone levels, responses to therapy, and so forth.
While perception of efficacy has significant effect
on patient adherence, this study was
unable to assess
severity of symptoms or of symptomatic relief, once patients initiated therapy.
The study was unable to identify characteristics that were associated with the time patients would be on therapy
before treatment was interrupted or
who would resume
therapy after a brief
interruption. Most patients
who
resumed
therapy
did
so
by using
the same
topical TRT agent and the same dose they used prior to the interruption. It is possible
that these patients
perceived efficacy,
were proficient in the application method, and possibly had a prescription that
they
were able to use or refill
without the need
for an office visit.
Only a small percentage of patients
using topical
therapy resumed therapy
by using a different method
or a change
in the dosing regimen.
Lesson:
Patients on testosterone should have their blood levels and symptoms evaluated after a few weeks on therapy. Depending on these follow up results, dose adjustment or change of delivery method should be explored as well as other issues that may potentially affect efficacy and adherence (life style, other medications, body mass index, etc). Expectations should also be clearly described at the start of therapy (for more on what to expect, read this ) so that patients have realistic views. Stamina and sexual function are multifactorial and testosterone blood levels are only part of the puzzle.
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